CN213327755U - Device for extracting rare metal oxide from slag ball waste generated in rock wool production process by using red mud - Google Patents

Abstract

The utility model relates to a to the technical field of the utilization device of the slag ball waste material that red mud production rock wool in-process produced, particularly, be a device that draws rare metal oxide with the slag ball waste material that red mud production rock wool in-process produced. The device comprises a slag ball waste material to-be-treated bin, wherein a discharge port of the to-be-treated bin is in butt joint with a feed end of an automatic belt conveyor, the automatic belt conveyor is connected with a magnetic separator, a nonmagnetic material outlet of the magnetic separator is in butt joint with the feed end of the automatic belt conveyor, the device also comprises a two-stage hammer crusher, an ultra-strong dry magnetic separator, a separation tank, an acidolysis tank and the like.

Description

Device for extracting rare metal oxide from slag ball waste generated in rock wool production process by using red mud

Technical Field

The utility model relates to a to the technical field of the utilization device of the slag ball waste material that red mud production rock wool in-process produced, particularly, be a device that draws rare metal oxide with the slag ball waste material that red mud production rock wool in-process produced.

Background

By the patent number: 2015106684305 and 201710949843X 'process method for producing inorganic fiber by red mud', slag ball waste is generated in the production process of rock wool by red mud, wherein the slag balls account for about 3% of the waste, and mainly come from slag balls which are rejected by a cotton collecting device and are thrown out by a four-roller centrifuge during fiber centrifugation and fall into a pit, one production line can generate kiloton-grade slag ball waste every year, and the slag ball waste cannot be degraded and is treated in a stacking or burying way, so that the environment is polluted. Currently, the most effective approach is through patent numbers: 2019216996504A rock wool slag ball recycling system, which can mix slag ball waste material generated in the process of producing rock wool from red mud and red mud to a ball-making working section, and make the ball-shaped material become raw material for producing rock wool to recycle.

The raw material slag balls are slag ball waste materials generated in the method for producing inorganic fibers (rock wool) from red mud, which is described as follows, and the method for producing the inorganic fibers (rock wool) from the red mud is introduced as follows, and the method adopts a self-developed complete set of 'a process method for producing the inorganic fibers from the red mud', and the main production process comprises the following process steps:

(1) the technological process of producing inorganic fiber with red mud is to produce inorganic fiber with red mud as main material in the amount up to 70% and with Si, Ca, Fe, Al, Na and Mg as resource.

(2) By the patent number: 201721091999.0A ball making system in the process of producing inorganic fiber by red mud comprises a proportioning machine, a crushing mixer, a ball press and a ball bin box body, wherein the proportioning machine comprises a red mud bin and an auxiliary material bin. Pressing the ingredients into ball blocks;

(3) the batching that will make the ball piece is through gathering the natural solidification of ball piece material, storing, turnover multi-functional in the patent number of an organic whole: 201821987578.0A ball turnover bin, ball partition turnover bin, through the solidification, turnover, shade dry, storage phase of accomplishing the ball, can stagger the production cycle of other whole feed bins, improves the availability factor of turnover bin, realizes the turnover. Red mud batching ball in ball turnover storehouse, through patent number: 201920930289.5 'distributing mechanism and distributing system for electric melting furnace', the distributing mechanism for electric melting furnace can make the material distribute around the three-phase electrode of the electric melting furnace more uniformly, the furnace charge preheat evenly, the feeding quantity and position have higher precision, and can also realize the manual control and automatic control of the production flow. The electric arc furnace has the advantages that the electric arc furnace is stable in combustion and balanced in three-phase current through quantitative and timely reasonable feeding, labor is saved through automatic operation, the product quality is stable, and the electric melting furnace is safe to operate.

(4) The main materials of the ball block are as follows through published patent numbers: 201910532713.5 "a furnace and method for electric melting and producing rock wool by electric melting red mud" and patent number: 2019209302984A "electric melting furnace" is high temperature melting, the melting section of the process of producing rock wool by using the electric melting furnace to replace a cupola furnace, when the electric melting furnace is used to produce rock wool by using red mud as main material, the method uses the patent number: 201920930354.4A preheating ignition device for electric melting furnace is characterized in that a high-power nickel-chromium resistance wire is added at the point of discharge of a three-phase graphite electrode to preheat the point of discharge and serve as an ignition device, and the ignition device can be used for stabilizing and excessively drying the furnace, preheating furnace burden and igniting electric arc of the three-phase electrode in the electric melting furnace. The electric melting furnace has high arc striking speed, can stably and successfully strike the arc at one time, has balanced three-phase current and can be automatically or manually controlled. The three-phase graphite electrode and the working lining of the rock wool molten liquid operate under the condition of long-term erosion of high-temperature and high-alkali molten liquid, 4-6kg of carbon can be consumed in molten liquid per ton of rock wool products, the iron in red mud in furnace materials can be just used as a reducing agent, and the elemental iron can be reduced while the rock wool is produced by utilizing the red mud. The ball main material is melted in a high-temperature electric melting furnace to form molten liquid, the upper part of the molten liquid is inorganic fiber solution, the inorganic fiber solution is subjected to wire throwing treatment by a centrifugal machine to form inorganic fiber cotton, and finally various rock wool products are manufactured. And (4) iron solution is arranged at the lower part of the molten liquid, and iron extraction treatment is carried out.

(5) By the patent number: 201920930312.0 'an electric melting furnace door', designing a furnace door frame and a liftable furnace door cover matching with the position of a fluid outlet, making the flow of rock wool melt and iron liquid outlet controllable, thereby keeping the falling amplitude of the melt liquid level in the furnace controlled in the reasonable height range capable of keeping continuous rock wool production, making the rock wool melt slowly flow out, and making the rock wool melt stably produce for a long time through a four-roller centrifuge; because the density of the iron liquid is different from that of the rock wool, the rock wool liquid is on the top and the iron liquid is on the bottom, when the iron liquid reaches a certain degree, simple substance iron can be extracted simultaneously, the iron liquid outlet is lower than the rock wool molten liquid outlet, so that iron discharge is controllable, thereby realizing that 'cotton can be produced during iron discharge and iron can be discharged during cotton production', without stopping production, the uniform arc discharge power of a three-phase electrode of the electric melting furnace can be kept unchanged, constant temperature heating is maintained, and the electric melting furnace is ensured not to be influenced by load change and to be stably operated during iron discharge; the melt flow port can be plugged at any time through the matching of the furnace door frame and the furnace door cover, so that the phenomenon that the molten liquid leaks due to the hole leakage phenomenon is avoided.

(6) The rock wool molten liquid melted by the electric melting furnace is subjected to wire throwing treatment by a high-speed centrifugal machine, and is treated by the following steps: 201921702405.4A system for curing rock wool boards by electric heating wind circulation is characterized by rapid temperature rise and drop and no time delay, the temperature of hot wind in curing subareas can be adjusted according to needs, and the system has the effects of full utilization of waste heat, constant temperature, continuity and stability, and can produce rock wool series products with stable quality. The red mud is used for producing rock wool, the patent technologies of a high-efficiency electric melting furnace and an electric heating curing furnace are adopted, the heat efficiency is up to more than 75%, and the comprehensive energy consumption of each ton of rock wool products is 117.4 kg of standard coal. The red mud is used as a main material, and the electric melting furnace is used for producing rock wool, so that the investment cost, the operation cost, the environmental protection cost, the energy conservation and emission reduction, the product quality and other aspects are superior to those of a cupola furnace, other melting furnaces and other curing furnaces for producing rock wool products.

(7) In the whole production process flow, each ton of red mud can be used for producing more than 70 percent of rock wool and 3 percent of cotton dust, the leftover materials can be fully and repeatedly utilized, 10 percent of simple substance iron, 12 percent of loss on ignition and about 3 percent of slag ball waste materials. About 3 percent of slag ball waste is naturally enriched with lanthanide rare metal oxides such as titanium, scandium and the like in the red mud in the process of melting the red mud at high temperature by the electric melting furnace, and then the rare metal oxides in the slag ball waste are further extracted, so that the comprehensive utilization rate of the red mud resource can reach 100 percent. Has no secondary pollution to the environment, and achieves the purpose of completely squeezing the red mud.

Scandium, titanium and lanthanide physicochemical properties and resources:

(1) scandium resource: scandium is a typical rare-earth element, is only lower than lanthanum, cerium, rubidium and yttrium in rare-earth elements, is positioned at the fifth position, is higher than some common metals such as lead, mercury, molybdenum, gold, silver and the like, but has extremely dispersed geological distribution. There are many known scandium-containing minerals, most of which exist in the form of a homomimetic substitution. However, independent scandium minerals are few, and only a few scandium-yttrium stone, scandium-hydroscandite, silicoscanite, rare-earth titanosilicate ore and the like exist, and the mineral sources are small, rare in nature and often cannot be used as industrial raw materials for extracting scandium. Therefore, scandium is industrially obtained by comprehensively treating nonferrous rare metal ores and recovering the associated element scandium. The red mud is solid waste discharged in the production process of alumina, has large discharge amount, is strong alkaline, contains various components, contains a large amount of valuable metals, particularly rare earth metal elements, and has great recycling value. 75-80% of the worldwide scandium reserves are associated in bauxite, and in the process of producing alumina, when the bauxite is in alkaline dissolution, lanthanide elements such as Fe, Ca, Si, Mg, Ti, Sc and the like are remained in red mud to be enriched due to the large dissolution of alumina,more than 98% of lanthanide elements such as Ti, Sc and the like in the bauxite are enriched in the red mud, and TiO of the bauxite is enriched in the red mud₂、Sc₂O₃The content of the oxide of the lanthanide can reach more than 100g/t, even as high as 200 g/t. Although the red mud is industrial waste residue of an alumina plant, the content of lanthanoid such as titanium, scandium and the like is high and is close to an industrial grade. Therefore, research on the extraction process of lanthanides such as titanium, scandium and the like in the red mud is developed, so that the red mud can be effectively utilized, the extraction sources of the lanthanides such as titanium, scandium and the like can be expanded, the large-scale comprehensive utilization of the red mud becomes a main way for obtaining the lanthanides such as titanium, scandium and the like, and the comprehensive utilization of the red mud and the industrial development of the lanthanides such as titanium, scandium and the like can be positively influenced. Therefore, the research of extracting lanthanides such as titanium, scandium and the like from the slag ball waste has important significance for protecting the environment, particularly improving the comprehensive utilization rate of mineral resources.

(2) Physicochemical properties of scandium: scandium is similar to lanthanoid in nature, belongs to one of 17 rare earth elements, has extremely dispersed distribution, and is a typical rare dispersed metal. Physical properties of scandium: scandium has an atomic number of 21, belongs to transition metals in transition group III with rare earth metals of the lanthanide series in the periodic table. The pure metal scandium is silvery white and slightly yellow, has metallic luster, is very soft, and can be rolled into thin sheets without annealing. Scandium has an atomic weight of 44.956, an atomic radius of 0.1641nm, and no 4f electrons, and the lanthanide contraction thereof fails to reduce the size of the atom to a corresponding size, resulting in a significant difference in properties between scandium and rare earth elements, which hardly allows scandium to enter the rare earth family, but since it is associated with rare earth elements in nature and is somewhat similar in properties, scandium is also conventionally called a rare earth-like element. The crystal density at room temperature was 2.989g/cm3, and the liquid density (melting point: 1541 deg.C) was 2.80g/cm³The melting point is 1541 ℃, the boiling point is 2842 ℃, the electrical resistivity of scandium is 50-60u Ω · cm, and the thermal conductivity is 0.157W/(cm · K) under the state of atmospheric pressure room temperature. Chemical properties of scandium: scandium metal is an active metal, is easy to react with acid, is easy to combine with oxygen, carbon dioxide, water and the like in the air to lose metallic luster and turn into dark gray, but is slowly eroded by water. At room temperature, the metal scandium surface is emptiedThe oxygen in the gas oxidizes to form an oxide film which can prevent further oxidation, so that scandium is stable at 200 ℃ in air, but is strongly oxidized at a temperature of more than 250 ℃, and is strongly oxidized at 200 ℃ in pure oxygen and is more rapidly oxidized in moist oxygen. Electronic configuration of scandium atom [33]Is [ Sc ]]3d14s2 easily loses 3d14s2 electrons to form trivalent ions, and is colorless in water to easily form a compound. Scandium has an ionic radius of 8.1X 10^-11m, lutetium (8.5 x 10) less than the minimum ionic radius of the lanthanide^-11m). Since the hydroxide is extremely weak in alkalinity because of its extremely small ionic radius, when scandium and a rare earth element are mixed together, they can be separated from the rare earth element by the "fractional precipitation" method using a dilute alkali solution such as ammonia or the fractional decomposition method using scandium nitrate. Application of scandium: with the rapid development of high-tech and new material development and application, scandium has more and more extensive applications and rapidly increases the demand. Because scandium and its compounds have various excellent physical and chemical properties, scandium products are widely applied in the fields of national defense, metallurgy, electronics, chemical engineering, glass, aerospace, nuclear energy, superconductors, electric light sources and the like. In conclusion, scandium has wider and higher application, and particularly has increasingly prominent application in the development of high technology, new materials and advanced science. On the other hand, scandium and compounds thereof are extremely expensive and have low yield, and the development and popularization of new application of scandium and compounds thereof are also seriously influenced. The cost becomes a key factor for the development and application of scandium science and technology. Therefore, if a method for easily separating and purifying the scandium from the red mud can be researched, the yield of the scandium can be improved, and the scandium must play an important role in material civilization construction of human beings.

(3) Physical and chemical properties and resources of titanium: the atomic number of titanium is 22, and the relative atomic mass is 47.87. The arrangement of the extra-nuclear electrons in the sub-layer is 1S 22S 22P 63S 23P 63 d 24S 2. The density of titanium is 4.506-4.516 g/cc, higher than aluminum and lower than iron, copper and nickel. The melting point is 1668 +/-4 ℃, the titanium has plasticity, the elongation of the high-purity titanium can reach 50-60%, the reduction of area can reach 70-80%, but the strength is low, so the titanium is not suitable for being used as a structural material. At normal temperature, the corrosion speed of the sulfuric acid with the concentration of about 40 percent to titanium is the fastest, and when the concentration is more than 40 percent and reaches 60 percentThe corrosion rate becomes slower, and 80% reaches the fastest speed. The heated dilute acid or 50% concentrated sulfuric acid can react with titanium to produce titanium sulfate, and the heated concentrated sulfuric acid can be reduced by titanium to produce TiO₂. The classified extraction can be carried out when scandium and lanthanide are extracted due to the high titanium content in the red mud. ② the titanium has higher content in the earth crust, and ninth, the percentage is 0.56 percent. The pure titanium has a density of 4.54X 10³kg/m³The hardness is poor, and the Mohs hardness is only about 4, so the ductility is good. Titanium has good thermal stability, and the biggest disadvantage of titanium is difficult to refine. Mainly because titanium has a very strong chemical bonding ability at high temperatures and can be combined with oxygen, carbon, nitrogen and many other elements. ③ titanium oxide titanium dioxide, which is snow white powder, is the best white pigment, commonly called titanium white.

(4) Physical and chemical properties of lanthanide series elements: the general names of 15 elements of lanthanum 57 to lutetium 71 in the periodic table of elements include lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), and 17 elements in total, yttrium (Y) and scandium (Sc), which are closely related to 15 elements of the lanthanide series, and are called rare earth elements. They are all members of the rare earth elements. The lanthanoid is represented by the symbol Ln. Also called rare earth elements. The chemical properties of the 15 element compounds are very similar, the solubility of oxide and hydroxide in water is small, the alkalinity is strong, chloride, nitrate and sulfate are easy to dissolve in water, and oxalate, fluoride, carbonate and phosphate are difficult to dissolve in water. Lanthanides are very widely used.

Research on a process for extracting scandium, titanium and lanthanide from red mud.

1) At present, the main process for recovering rare earth metals from red mud is summarized as a process for treating red mud and acid leaching by a reduction smelting method, and a single mature process is not available at present. (1) A reduction smelting method: firstly roasting the red mud, then leaching the roasted red mud by hydrochloric acid, adding alkali, and finally separating to obtain titanium, scandium and rare earth metal, which is also only corresponding to the red mud obtained by a sintering method. (2) The acid leaching process comprises the following steps: red mud is sulfated and roasted. ② leaching the waste acid washing liquor to treat the red mud. Thirdly, leaching the red mud by using a sodium carbonate solution. And fourthly, directly leaching the red mud by using sulfuric acid with the concentration of 50 percent. Fifthly, leaching the red mud by concentrated hydrochloric acid.

2) The problems that exist are that: the key point is whether an economic, energy-saving, environment-friendly and generally applicable process can be found for realizing the industrialized recovery of scandium, titanium and rare earth metals in the red mud. Reduction smelting method: the difficulty of directly extracting the trace rare earth element scandium with the content of only 0.0001 percent order of magnitude from the red mud is conceivable, and finally, scandium is extracted by methods such as extraction and the like, so that the treatment capacity of waste water is large, the energy consumption is high, and no economic benefit exists. Acid leaching process: the acid consumption in the acid leaching process of the red mud is too large, which is not beneficial to environmental protection, and if the direct acid leaching separation and extraction of the rare earth metal are difficult, even if the experiment is successful, the method also is not desirable in view of the economic benefit problem of industrial production. Throughout the research results at home and abroad, all the process technologies aim at a certain red mud, have certain limitations and cannot be generally applied.

In recent years, with the increasing demand of industry for titanium and scandium, the process for extracting titanium and scandium by solvent extraction method has been developed continuously, and various novel extracting agents and extracting systems appear in succession. However, scandium is similar to lanthanoid in nature, belongs to one of 17 rare earth elements, is extremely dispersed in distribution, and is a typical rare dispersion metal. The method has very similar physical and chemical properties, single scandium is difficult to obtain from red mud by adopting general chemical methods such as fractional crystallization, fractional precipitation and the like, and the scandium extraction process is still in a continuous perfect stage. The expansion of the production scale of scandium and rare earth elements is limited by the reasons of high production cost, low content of scandium and rare earth elements and the like.

In the prior art, the process method for producing rock wool by using red mud does not relate to the technology and the process method for extracting titanium, scandium and rare metal oxides by recycling slag ball waste materials generated in the process of producing rock wool by using red mud. The method only aims at extracting the simple substance iron while producing the rock wool by using the red mud, and in the process of producing the rock wool by using the red mud, the cost of producing the rock wool by using the red mud is not increased, titanium, scandium and rare metal oxides in the red mud are naturally enriched by slag balls thrown out in the processes of high-temperature melting of red mud ingredients by an electric melting furnace and fiber forming by a centrifugal machine and throwing and cotton collecting waste materials thrown out by a cotton collecting device, the slag ball waste materials account for about 3 percent of the total amount of the red mud and the ingredients, one production line can generate kiloton-grade slag ball waste materials every year, the rare metal oxides in the red mud are naturally enriched in the slag ball waste materials in the process of producing the rock wool, and titanium, scandium and lanthanide element oxides in the slag ball waste materials are higher than hundreds of the red mud content. The slag ball waste has significance in recycling titanium, scandium and rare metal oxides, and industrial production of extracting titanium, scandium and rare metal oxides by using red mud can be really realized.

Therefore, in order to realize the industrialization of the recovery of rare metals in the red mud, the key point is to find a process method which is economic, energy-saving, environment-friendly, high in additional value, clean in dry pressing of the red mud and universally applicable, and find a new possible way for the comprehensive utilization of the red mud and the extraction of titanium and scandium in China. The utility model provides a device for extracting rare metal oxide from slag ball waste generated in the process of producing rock wool by red mud, and realizes industrial production of the process method.

SUMMERY OF THE UTILITY MODEL

In view of the distribution characteristics of rare metal oxides such as scandium and the like and the development trend of the scandium extraction field, the comprehensive utilization of the red mud is intensively researched, scandium-titanium and the rare metal oxides are naturally enriched in slag ball waste materials in the process of producing rock wool by the red mud, the scandium-metal oxides are extracted in a grading manner as a main process line, and the comprehensive recovery of the extracted titanium and the rare metal is considered. In order to extract titanium scandium and rare metal oxide in these slag ball waste materials, the utility model provides a slag ball waste material that produces with red mud production rock wool in-process draws rare metal oxide's device.

The technical scheme of the utility model is that:

a device for extracting rare metal oxide from slag ball waste generated in the process of producing rock wool by using red mud comprises a slag ball waste to-be-treated bin, wherein a discharge port of the to-be-treated bin is butted with a feed end of an automatic belt conveyor, the automatic belt conveyor is connected with a magnetic separator, a nonmagnetic material outlet of the magnetic separator is butted with the feed end of the automatic belt conveyor, the automatic belt conveyor is connected with a two-stage hammer crusher, a slag ball crushed aggregate outlet of the two-stage hammer crusher is butted with the automatic belt conveyor, the automatic belt conveyor is connected with a bin of a super-dry magnetic separator, the bin of the super-dry magnetic separator is butted with a feeding device, the feeding device is matched with a magnetic roller, a nonmagnetic material outlet of the super-dry magnetic separator is butted with the feed end of the automatic belt conveyor, the automatic belt conveyor is connected with a slag ball crushed aggregate bin, a discharge port of the slag ball crushed aggregate turnover bin is arranged at the lower end and is communicated with a feed port of a single-tube spiral, this single-tube screw feeder docks with stainless steel net box, and this stainless steel net box is hung by driving formula electron lifting hook balance, still includes separation tank and acidolysis pond, stainless steel net box arrange separation tank and acidolysis pond in proper order.

Further, the volume of the silo to be treated is generally selected to be 50-500m³The bin to be treated is in a hopper shape, is supported by a steel bracket, and is open at the upper part; further, the discharge gate sets up in pending feed bin side below, establishes the electromagnetic shaker near this discharge gate, prevents that pellet waste material from arching in the pending feed bin, realizes the even ejection of compact of pending feed bin discharge gate pellet waste material.

Furthermore, the feeding device realizes the uniform dispersion of the crushed slag balls by means of gravity and vibration of the crushed slag balls in a vibration mode, so that the adhered or wrapped magnetic substances are basically in a dispersion state.

Further, a brush matched with the magnetic roller is arranged; the magnetic material brushed by the brush is automatically separated from the magnetic material outlet, the brush brushes the magnetic material adsorbed on the surface of the magnetic roller, then the magnetic material is automatically separated from the magnetic material outlet, and the slag ball crushed aggregates containing titanium, scandium and lanthanide oxides are automatically separated from the nonmagnetic material outlet of the super-dry magnetic separator.

Furthermore, the volume of the slag ball crushed aggregates turnover bin is generally selected to be 10-100m³The turnover bin is in a bucket shape, is supported by the steel support, is opened above the turnover bin, and is fed by the belt conveyor from the upper side, the discharge port of the turnover bin is arranged at the lower end and is communicated with the feed port of the single-tube type spiral feeder, and uniform discharging below the turnover bin can be realized by regulating and controlling the single-tube type spiral feeder.

Furthermore, the single-tube spiral feeder detects the weight of the slag ball crushed aggregates passing through a weighing bridge frame, and a digital speed measuring sensor is arranged at the tail part of the single-tube spiral feeder; the digital speed measuring sensor continuously measures the running speed of the feeder, the pulse output of the speed sensor is in direct proportion to the speed of the feeder, the speed signal and the weight signal are sent to the feeder controller together, and a microprocessor in the controller processes the speed signal and the weight signal to generate and display the accumulative amount/instantaneous flow. The flow is compared with the set flow, and the output signal of the controller controls the frequency converter to change the driving speed of the conveyor, so that the flow of the crushed slag balls on the single-tube type spiral feeder is changed, the set flow of the crushed slag balls is approached and maintained, and the requirement of quantitative conveying is met.

Furthermore, the stainless steel net cage is an acid-base-resistant and high-temperature-resistant stainless steel net cage, a 316L thickened stainless steel pipe is welded into a rectangular box frame with an upper opening, and two balance hoisting points are arranged on the box frame; furthermore, the periphery and the bottom surface of the stainless steel box body frame are welded to the inner side of the stainless steel frame by using 316L large-hole stainless steel nets; so as to be convenient for supporting outside the stainless steel net box; preferably, the bottom of the net cage is additionally provided with a support and an inclined pull rod, so that the mechanical strength of the net cage is increased, and the deformation of the stainless steel net is prevented when the internal pressure of the net cage is large; further preferably, the rectangular box frame is preferably 2m long, 0.6m wide and 1m high; preferably, the diameter of the meshes of the 316L stainless steel used for the periphery of the box frame is 0.5-1cm, the diameter of the meshes is 2-3mm, the diameter of the meshes of the bottom surface of the box is 0.5-1cm, and the diameter of the meshes is 3-5 mm. Welding the periphery and the bottom surface of the stainless steel box body frame to the inner side of the large-hole stainless steel net by using 316L small-hole stainless steel nets so as to prevent the small-hole stainless steel nets from seriously deforming when the internal pressure of the net cage is high; preferably, the stainless steel meshes of the small holes on the periphery of the box frame and the bottom of the box are 150-200 meshes, and the diameter of the mesh is 0.1-0.5 mm.

Furthermore, the separation tank is formed by welding 316L stainless steel plates which have acid and alkali corrosion resistance, high temperature resistance, high tensile strength and compressive strength, easy welding and low overheating sensitivity. The separation tank is a rectangular box body with an upper opening welded by 316L stainless steel plates, the general size of the rectangular box body is preferably 5m long, 1m wide and 1.3m high, the thickness of the 316L stainless steel plates on four sides is 2-5mm, and the thickness of the 316L stainless steel plates on the bottom is 5-10 mm. Further preferably, the electric heating devices are uniformly arranged below the rectangular box body of the separation tank, and can provide required temperature for the whole rectangular box body.

Furthermore, an automatic weighing device I is further arranged below the 316L stainless steel separation tank body, is high-speed and high-precision online weight detection equipment and is mainly used for detecting the weight of the leachate in the separation tank body including the tank body on line, can automatically, quickly, dynamically, accurately and real-timely detect the weight of the leachate, and is combined with an electronic computer to increase the function of a weighing display controller by utilizing the intelligence of the electronic computer, so that quick and accurate digital display is realized. The automatic weighing device I is added with the functions of reasoning, judgment, self diagnosis, self adaptation, self organization, memory, printing and the like on the basis of the original functions.

Furthermore, the electronic crane hook scale comprises an electronic crane hook scale and a crane, an upper hook of the electronic crane hook scale is hooked with a crane hook, and the crane can drag the hook to move up and down and left and right. Preferably, the driving type electronic hook scale is a wireless transmission type electronic hook scale, and comprises a weighing sensor, a scale body and a weighing display, wherein a microprocessor is adopted for sampling and data processing, the weighing sensor and the scale body are independent unit elements, the weighing display is another independent unit element, and no electric wire or other mechanical connection exists between the two unit elements. Preferably, the weighing sensor and the scale body unit element are hung on a lifting hook of the hoisting machine, a 6V/4AH sealed rechargeable battery is arranged in the weighing sensor and the scale body unit element, and the rechargeable primary battery can be continuously used for 40 hours; the weighing display unit element is arranged on a ground operation platform, and the distance between the operation platform and the hoisting machinery site can reach 100 m. When weighing, the weight electric signal is transmitted in the form of code carrier wave through the weighing sensor and the radio transmission device on the scale body unit, the receiving device on the weighing display controller unit receives the signal and sends the signal to the microprocessor for processing, and the microcomputer network displays the weight of the object to be weighed or prints and records. The reading can be stabilized within 3-5 seconds when weighing. Preferably, the range of the traveling type electronic hook scale is 1.5T-2T, the error sensing quantity is 0.1kg, the built-in antenna of the electronic hook scale has the use temperature of less than or equal to 90 ℃ within 20 ℃, the battery voltage is automatically indicated when the electronic hook scale is started or shut down, overload and battery low voltage alarm are carried out, the use safety is ensured, any weight value is corrected, and the division value selection is displayed. Further preferably, the electronic hanging scale has an automatic peeling function, the electronic hanging scale is guaranteed to be used in various occasions, the electronic hanging scale enters a power saving mode after being statically loaded for 5 minutes when being used, the electronic hanging scale can be automatically shut down after being statically loaded for 30 minutes, and battery damage caused by human negligence is avoided. Further preferably, the electronic hanging scale adopts a palm type remote controller, is convenient to operate, and can operate the travelling crane within a distance range of 10 meters to enable the lifting hook to move up, down, left and right. The electronic hanging scale takes care of when in use: when the electronic hanging scale works in a high-temperature environment, the distance between the bottom surface of a lifting hook of a scale body and a hung heat source is required to be more than 1.6m, and the temperature of a lifted object is not more than 180 ℃. A travelling electronic crane scale I is supported by a workshop steel frame, is arranged above a 316L stainless steel separation tank box body, and monitors the leaching amount of suspended 1 unit of slag ball crushed aggregates, calcium, scandium and lanthanide in hydrochloric acid leaching liquid at any time.

Furthermore, the acidolysis tank is a rectangular box body with an upper opening welded by 316L stainless steel plates, the thickness of the 316L stainless steel plates on four sides is 3-5mm, and the thickness of the 316L stainless steel plates on the bottom is 5-10 mm; more preferably, the rectangular box body of the acidolysis tank is suitable for being 3m long by 1m wide by 1.3m high, and is designed by mainly considering that the liquid-solid ratio L/S of the high-concentration sulfuric acid leachate and the waste residue acidified by hydrochloric acid is 3: 1. Namely, the acidolysis tank is welded by 316L stainless steel plates which require acid-base-resistant corrosion-resistant property, high temperature resistance, high tensile strength and compressive strength, easy welding and low overheating sensitivity. Furthermore, the electric heating devices are uniformly arranged under the rectangular box body welded by the stainless steel plates of the acidolysis tank, so that the whole bottom surface of the rectangular box body can be uniformly heated.

Further, still be provided with automatic weighing device under 316L stainless steel acid hydrolysis pond box, automatic weighing device is a quick, the online check weighing equipment of high accuracy, and the mainly used on-line measuring acid hydrolysis pond box includes the inside leachate weight of box, can be automatic, quick, dynamic, accurate, real-time detection, and with the electronic computer combination of automatic weighing device I, utilize electronic computer's intelligence to increase the function of weighing display controller, realize quick accurate digital display. The automatic weighing device is added with the functions of reasoning, judgment, self diagnosis, self adaptation, self organization, memory, printing and the like on the basis of the original functions.

Furthermore, the parameter requirements of the driving type electronic hook scale are the same as those of the driving type electronic hook scale; the travelling electronic hook scale is supported by a workshop steel frame and is arranged above a 316L stainless steel acidolysis tank box body to monitor the leaching amount of titanium and silicon residues leached in high-concentration sulfuric acid leachate at any time.

The utility model discloses a device for extracting rare metal oxide from slag ball waste materials generated in the process of producing rock wool by red mud specifically as follows: the device comprises a slag ball waste material bin to be treated, wherein a discharge port of the bin to be treated is butted with a feed end of an automatic belt conveyor I, the automatic belt conveyor I is connected with a magnetic separator I, a nonmagnetic material outlet of the magnetic separator I is butted with a feed end of an automatic belt conveyor II, the automatic belt conveyor II is connected with a two-stage hammer crusher, a slag ball crushed material outlet of the two-stage hammer crusher is butted with an automatic belt conveyor III, the automatic belt conveyor III is connected with a bin of a super-dry magnetic separator, the bin of the super-dry magnetic separator is butted with a feeding device, the feeding device is matched with a magnetic roller, a nonmagnetic material outlet of the super-dry magnetic separator is butted with a feed end of an automatic belt conveyor IV, the automatic belt conveyor IV is connected with a slag ball crushed material turnover bin, a discharge port of the slag ball turnover bin is arranged at the lower end and is communicated with a feed port of a single-tube type spiral feeder, the single-tube type spiral feeder is butted with a stainless steel mesh box, the stainless steel mesh box is lifted by a travelling type electronic hook scale I, and the stainless steel mesh box is arranged in a separation pool; still include the acidolysis pond, the stainless steel net box that comes out by the separation tank is placed in the acidolysis pond again by driving formula electron hook balance II, and this acidolysis pond is used for continuing the acidolysis to the residue that the separation tank was handled and is accomplished, obtains titanium, silicon oxide.

The process method for extracting rare metal oxide from slag ball waste generated in the process of producing rock wool by red mud matched with the device comprises the following steps:

the method comprises the following steps of firstly, completely separating iron from slag ball waste, and fully extracting iron from the slag ball waste by a magnetic separation iron extraction method;

step two, feeding the crushed slag balls into a crushed slag turnover bin;

step three, putting the crushed slag balls into a standard stainless steel net box and sending the crushed slag balls into a separation tank;

step four, extracting scandium and lanthanide metal oxides from hydrochloric acid leachate;

and step five, separating titanium and silicon oxide in an acidolysis tank.

Further, in the step one, the slag ball waste is subjected to a treatment method of magnetic separation iron extraction twice, so that the slag ball waste is subjected to sufficient iron extraction treatment.

Further, in the third step, the crushed slag balls are conveyed into a crushed slag turnover bin, then are weighed and then enter a standard stainless steel net cage, and then are conveyed into a separation tank.

Further, the step of completely separating iron from the slag ball waste comprises the following detailed steps:

(1) sending the collected slag ball waste into a slag ball waste bin to be treated by using a forklift, and then sending the slag ball waste into a magnetic separator through an automatic belt conveyor to carry out primary iron extraction and rough separation; the separation of iron and slag balls for the first time is realized, iron is automatically separated from the magnetic material outlet and is stacked by a forklift for sale, and after the slag ball waste is magnetically separated and deironized by the magnetic separator, the remaining slag ball waste is automatically separated from the nonmagnetic material outlet of the magnetic separator. Titanium, scandium and lanthanide oxides in the slag ball waste after the first magnetic separation are hundreds of times higher than those in the red mud content.

(2) The slag ball waste after the first magnetic separation contains a small amount of iron and is enriched with high-content titanium, scandium and lanthanide oxides. Feeding the slag ball waste subjected to the first magnetic separation into a hopper of a two-stage hammer crusher through an automatic belt conveyor, crushing the slag ball waste by the two-stage hammer crusher, and controlling the granularity to be 1-2 mm to obtain slag ball crushed materials; specifically do, the sediment ball waste material gets into broken intracavity from the feed inlet of doublestage hammer crusher's hopper, and first group tup is constantly stirred downwards anticlockwise, patts the material, smashes mutually, reaches the hammer powder material, and the effect of material powder material gets into the second and organizes the tup and pat repeatedly, and two sets of tups carry out high-speed patting formula to the material and smash, discharge in following the tup gap after the material crushing to certain fineness to guarantee the fineness of ejection of compact granularity. Among them, the two-stage hammer crusher is also called a two-stage crusher, a two-stage sieve-bottom-free crusher, etc. Although the double-stage pulverizer has no sieve bottom, the upper and lower two-stage rotors are adopted for pulverization, the discharge particle size is more uniform and ultrafine, and the particle size can be controlled to be 1-2 mm. Double-rotor upper and lower two-stage pulverizer: the two sets of rotors which are mutually connected in series enable the materials crushed by the upper rotor to be crushed again by the hammer heads of the lower rotor which rotates at a high speed, and the materials in the inner cavities collide with each other at a high speed and are crushed mutually, so that the effects of hammering the powder materials and feeding the powder materials are achieved, and the materials are directly discharged.

(3) Carrying out magnetic separation for the second time to extract iron, and sending the crushed slag balls containing a small amount of iron into a bin of an ultra-strong dry magnetic separator for fine separation through an automatic belt conveyor; the crushed slag balls fall into a uniform-speed feeding device through a bin, the materials and the magnetic substances are subjected to gravity and vibration in a vibration mode before entering a magnetic separation area through the feeding device, the adhered or wrapped magnetic substances basically realize a dispersion state and can be uniformly conveyed to the magnetic separation area, under the effect of gravity and magnetic field power in the magnetic separation district of equipment, the magnetic difference that utilizes the material has different movement tracks to realize the separation, magnetic substance is adsorbed in the rotation of magnetism roller surface and is reachd the concentrate district, the brush takes off the magnetic material brush that adsorbs on the magnetism roller surface, iron exports self-separation from the magnetic material, the sediment ball crushed aggregates that contain titanium, scandium and lanthanide oxide exports self-separation from the non-magnetic material of super dry-type magnet separator, fall into the top of automatic band conveyer feed end, send into these sediment ball crushed aggregates into sediment ball crushed aggregates turnover storehouse for use through automatic band conveyer. Through secondary strong magnetic separation of iron, the slag ball crushed material has no iron component basically, because the iron is dissolved in hydrochloric acid, the purpose is to prevent interference during scandium extraction; because the oxides of titanium, scandium and lanthanide have no magnetism in the slag ball crushed aggregates, the oxides are automatically separated from the nonmagnetic material outlet of the super-strong dry magnetic separator and fall above the feeding end of the automatic belt conveyor, and the slag ball crushed aggregates are sent into a slag ball crushed aggregate turnover bin for standby application through the automatic belt conveyor. The content of scandium and lanthanide element oxides of the slag ball crushed materials after the iron is removed through the second time of fine selection is more than one hundred times of that of the red mud. Through two times of magnetic separation, the content of the slag ball crushed material can reach 10-20% only by considering titanium metal oxide, and the content of scandium and rare metal oxide can reach 0.3%.

And further, in the second step, the crushed slag balls are sent to a crushed slag turnover bin, and the detailed steps are as follows:

feeding the crushed slag balls subjected to iron extraction twice into a crushed slag ball turnover bin, feeding from the upper side through an automatic belt conveyor, wherein a discharge hole of the crushed slag ball turnover bin is formed in the lower side of the crushed slag ball turnover bin, the discharge hole of the crushed slag ball turnover bin is communicated with a feed inlet of a single-tube type spiral feeder, and stainless steel mesh boxes of the single-tube type spiral feeder are butted; through the regulation and control to single tube formula screw feeder, realize the even ejection of compact below the turnover storehouse, adopt single tube screw feeder can design into horizontal transport according to the operation requirement, the slope is carried, vertical transport etc. its feed is stable, and is with low costs, the environmental protection, the programmed operation of being convenient for. When the single-tube type spiral feeder is required to work, the crushed slag balls fall into a feed inlet of the single-tube type spiral feeder by means of gravity, the crushed slag balls control the discharge amount by controlling the rotation speed of the single-tube type spiral feeder, and the purposes of adjustable loading amount of the stainless steel mesh box and limited standard loading are achieved.

Step three, putting the crushed slag balls into a standard stainless steel net box and sending the crushed slag balls into a separation tank; the method comprises the following specific steps:

the crushed slag balls are transferred to the crushed slag in the transfer binLoading the crushed slag balls into a stainless steel net cage for automatic weighing by a single-shaft screw conveyor, hoisting the stainless steel net cage by a crane type electronic hook scale lifting hook, sending the stainless steel net cage into a separation tank with hydrochloric acid leaching liquid, and adding titanium and Silicon (SiO)₂) And calcium and lanthanide rare earth elements are subjected to fractionation. Further preferably, the solid-to-liquid ratio L/S of the hydrochloric acid leachate to the slag ball crushed aggregates in the separation tank is 3-5:1, and the size of the separation tank is designed by mainly considering the parameter that the solid-to-liquid ratio L/S of the hydrochloric acid leachate to the slag ball crushed aggregates is 3-5: 1. Further preferably, in the fractionation process, the temperature required by the process reaction of leaching calcium, scandium and lanthanide elements by hydrochloric acid at the early stage is 60-90 ℃; extracting calcium chloride in the middle stage, wherein the required temperature is increased to 240-280 ℃; and after the later hydrochloric acid leaching solution is added with a sodium hydroxide solution to generate a hydroxide precipitate and remove brine, the ignition temperature of the hydroxide precipitate is 600-800 ℃. Further preferably, the weight of the slag ball crushed aggregates filled in each stainless steel net cage is 0.5-1T, and is 1 unit weight; therefore, the "1 unit" of the shot waste is defined as 0.5 to 1T. Two stainless steel net cages can be accommodated simultaneously under the condition of sufficient space in the separation tank. Further preferably, in order to increase the contact area between the leachate and the crushed slag balls in the stainless steel net box, shorten the leaching time and improve the reaction speed and the leaching rate, a leachate permeable layer is additionally arranged in the stainless steel net box along the length direction, so that the crushed slag balls in the net box can be fully contacted with the leachate. Further preferably, each production line has at least 6-8 stainless steel net cages for normal turnover.

Further preferably, the concentration of the lixiviant hydrochloric acid in the separation pool is 5-7mol/L, the liquid-solid ratio L/S is 3-5:1, the reaction temperature is 60-90 ℃, and the reaction time is 2-3 h; under the condition of slow stirring, the leaching rate of scandium can reach more than 98%, and in the process of leaching scandium by hydrochloric acid, calcium and lanthanide rare earth elements are also leached together and enter the hydrochloric acid leaching solution. Research results show that the factors influencing the leaching rate of the rare earth in the separation tank are the leaching temperature, the hydrochloric acid concentration, the ingredient liquid-solid ratio and the leaching time in turn. Most of scandium, calcium and rare earth element metals enter hydrochloric acid leaching solution in the form of ions due to titanium and Silicon (SiO)₂) Insoluble in low concentration hydrochloric acid, and can be enriched in the residueHydrochloric acid is used for enriching titanium and Silicon (SiO)₂) The residue of (2) is precipitated from the hydrochloric acid leach liquor, i.e. containing Silicon (SiO)₂) And the separated residue after hydrochloric acid leaching of the titanium metal oxide is put into an acidolysis tank together with a stainless steel net cage. Titanium and Silicon (SiO) are achieved₂) And scandium, lanthanide metal oxides.

Further preferably, in order to reduce the leaching time in the leaching process, a wireless controller is used for controlling a stainless steel net cage of a lifting hook of a travelling electronic hook scale, and the stainless steel net cage slowly and repeatedly moves up and down in the hydrochloric acid leaching solution every 5-10 minutes to drive the slag ball crushed aggregates with the number of 1 unit in the stainless steel net cage to repeatedly move up and down in the hydrochloric acid leaching solution, so that the slow stirring process is replaced.

The hydrochloric acid leaching solution reaches the limit of a saturated state. In the actual production process, the crushed materials of the slag balls contained in the stainless steel net box with 1 unit are repeatedly leached in the separation tank and the hydrochloric acid leaching solution under the conditions until the hydrochloric acid leaching solution reaches a saturated state. That is to say, the 1 unit slag ball crushed aggregates and the stainless steel net box at the Nth time are leached under the condition of hydrochloric acid leaching liquid, the weight of the whole box body of the weighing separation tank is not increased, or the leaching rate of scandium, lanthanide and calcium of the 1 unit slag ball crushed aggregates does not reach the requirement of more than 98%, and at the moment, the hydrochloric acid leaching liquid is proved to reach the saturated state. In the process of leaching scandium oxide with hydrochloric acid, lanthanide rare earth elements and calcium are also leached together and enter the hydrochloric acid leaching solution in the form of ions.

Further, step four, extracting scandium and lanthanide rare earth element metal oxides from the hydrochloric acid leaching solution, and the detailed steps are as follows:

(1) extraction of calcium chloride: extracting calcium chloride from the saturated hydrochloric acid leachate, drying and dehydrating the calcium chloride at 200 ℃ to obtain dihydrate, and heating to 260 ℃ to obtain white porous anhydrous calcium chloride. Part of the hydrated calcium chloride undergoes hydrolysis reaction in the heating dehydration process, so that the product often contains a small amount of CaO impurity, and CaCl extracted from the hydrochloric acid leaching solution₂The purity can reach more than 90 percent, and the product can be preparedFor industrial production of high-purity CaCl₂The raw materials of (1).

(2) Extraction of scandium and lanthanide metal oxides: extracting CaCl from the residue in a separation tank₂The hydrochloric acid leachate is a hydrochloric acid leachate containing scandium and lanthanide and having higher purity and existing in an ion mode, and CaCl is extracted₂The hydroxide precipitation method adopted in the hydrochloric acid leachate is suitable for separating scandium and lanthanide metal oxides.

Further preferably: separating hydrochloric acid leachate from scandium and lanthanide rare earth elements: extracting with CaCl₂Slowly adding 5-10% of sodium hydroxide solution into the hydrochloric acid leachate, slowly stirring to generate a large amount of hydroxide precipitates, continuously slowly adding the sodium hydroxide solution into the hydrochloric acid leachate, slowly stirring until the sodium hydroxide solution is added into the separation tank and no precipitate is generated, wherein the upper layer of liquid in the separation tank is a salt hydrate, the upper layer of brine is taken out, and the lower layer is the hydroxide precipitate of scandium and lanthanide rare earth elements. Separating scandium and lanthanide rare earth elements in the precipitate: burning the hydroxide precipitate at the temperature of 600 plus 800 ℃ to remove water, wherein scandium oxide is firstly separated out, and lanthanide rare earth oxide is separated out at the later stage; the total content of scandium and lanthanide rare earth elements in the hydroxide precipitate reaches 10-20%.

Further, step five, separating titanium and silicon oxide in an acidolysis tank, and the detailed steps are as follows:

silicon (SiO)₂) The separated residue after hydrochloric acid leaching with titanium metal oxide is placed into an acidolysis tank together with a stainless steel net cage, titanium enters the high-concentration sulfuric acid leaching solution in the form of ions in the process of leaching titanium from the high-concentration sulfuric acid leaching solution, silicon does not react with the high-concentration sulfuric acid solution, and Silicon (SiO)₂) The residue can be directly separated from the high-concentration sulfuric acid leachate through a stainless steel net box, and the residue after acid hydrolysis mainly contains SiO₂SiO after the residue is treated₂Accounts for more than 90 percent, and can be mixed with the red mud for recycling.

Furthermore, the factors influencing the separation and leaching rate of titanium oxide in the titanium and silicon residues in the acidolysis tank are as follows: dipping in waterThe leaching agent is controlled to use 90-95% high-concentration sulfuric acid (H) in the steps of outlet temperature, sulfuric acid concentration, ingredient liquid-solid ratio and leaching time₂SO₄) The leaching rate of titanium can reach more than 95% under the condition of slowly stirring, wherein the liquid-solid ratio L/S is 2-4:1, the reaction temperature is 50-70 ℃, the reaction time is 1-2 h.

Further, hydrolyzing the titanium sulfate salt solution (the titanium sulfate exists only in the extremely concentrated sulfuric acid) formed by the high-concentration sulfuric acid leachate which is saturated in the acidolysis tank, preparing the metatitanic acid by a titanium sulfate hydrolysis method, wherein the hydrolysis takes the formed crystal nucleus as a crystal center to induce and promote the deposition and growth of the hydrate ions of the titanium on the surface of the titanium, finally forming the metatitanic acid, and calcining the metatitanic acid at the temperature of 950-1200 ℃ to prepare the titanium dioxide (TiO)₂)。

Further preferably, the reaction temperature of the process of leaching titanium by high-concentration sulfuric acid at the early stage is 50-70 ℃; and the metatitanic acid is calcined at the later stage at 950 ℃ and 1200 ℃. In the process of leaching titanium by using high-concentration sulfuric acid solution, silicon does not react with the high-concentration sulfuric acid solution, and Silicon (SiO)₂) The residue is directly precipitated from the high-concentration sulfuric acid solution, i.e. containing Silicon (SiO)₂) The oxide slag is directly separated to obtain titanium and Silicon (SiO)₂) The purpose of the separation is. Repeatedly leaching titanium and silicon residues with 1 unit in the acidolysis tank and the high-concentration sulfuric acid solution under the conditions. In each '1 unit' residue stainless steel net cage, in order to reduce the leaching time in the leaching process, a wireless controller can be used for controlling a lifting hook 316L stainless steel net cage of a crane type electronic hook scale II, and the lifting hook slowly and repeatedly moves up and down in the sulfuric acid leaching solution every 5-10 minutes to drive the '1 unit' residue in the 316L stainless steel net cage to repeatedly move up and down in the sulfuric acid leaching solution, so that the slow stirring process is replaced. Until the high-concentration sulfuric acid leaching liquid reaches a saturated state. That is to say, the Nth leaching of the titanium and silicon residues with the leaching rate of 1 unit is performed under the condition of high-concentration sulfuric acid leaching liquid, the weight of the whole box body is not increased by weighing, that is to say, the leaching rate of the titanium and silicon residues does not reach the requirement of more than 95%, and the high-concentration sulfuric acid leaching liquid is proved to reach the saturated state at the moment.

The beneficial effects of the utility model reside in that: the utility model provides an utilize slag ball waste material that red mud production rock wool in-process produced to draw rare metal oxide's device, including pending feed bin, magnet separator, superstrong dry-type magnet separator, separation tank, acidolysis pond etc, the device is under the condition that produces high added value with red mud production rock wool in-process, separates according to step by step, the principle of hierarchical enrichment, can effectively draw rare earth element, and waste water treatment volume is few, accords with the requirement of energy-conservation and environmental protection, and whole process does not produce new pollution, and has realized the abundant comprehensive utilization of red mud.

And the treatment method of the device has low cost and high added value. The slag ball waste enrichment stage has no new production cost, is easy to realize industrial production, and can store a large amount of slag ball waste enriched with titanium, scandium and rare metal oxides. The method solves the problem of too large acid consumption in the process of acid leaching of red mud in the past, and the cost is low for enriching titanium, scandium and rare metal oxides by using slag ball waste in the process of producing rock wool by using red mud, but the later separation process has lower cost and high added value compared with other extraction methods.

The device has the advantages of short flow, small equipment investment and low cost for extracting titanium, scandium and rare metal oxides.

The process of each step matched with the device is easy to realize, the industrial circulating reciprocating production can be realized, the red mud can reach a state of being dry and completely squeezed, the supply of products and byproducts is not in demand, the red mud is comprehensively utilized in a primary classification manner to produce rock wool series products and elementary substance iron, slag ball waste materials generated in the process of producing rock wool by utilizing the red mud are unintentionally enriched with rare metal oxides such as titanium, scandium and the like, and then the slag ball waste materials are subjected to a classification extraction method to finally obtain the system process of rare metal oxides such as scandium, titanium and the like. And the raw material storage capacity is large, so that the industrialization and large-scale production of comprehensive utilization of the red mud are facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural view of the device of the present invention.

Wherein, 1-a storage bin to be treated, 11-a discharge port, 12-a vibrator, 21-an automatic belt conveyor I, 22-an automatic belt conveyor II, 23-an automatic belt conveyor III, 24-an automatic belt conveyor IV, 3-a magnetic separator I, 31-a nonmagnetic material outlet, 4-a two-stage hammer crusher, 41-a crushed slag ball material outlet, 5-a super-strong dry magnetic separator, 6-a feeding device, 7-a magnetic roller, 71-a hair brush, 72-a nonmagnetic material outlet, 73-a magnetic material outlet, 8-a crushed slag ball material turnover bin, 81-a crushed slag ball turnover bin discharge port, 9-a single-pipe spiral feeder, 91-a separation tank, 92-an acid hydrolysis tank, 93-an electric heating device and 10-a stainless steel net cage, 101-traveling type electronic hook scale.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

The following aspects of necessity, rationality and innovativeness arising from the technical solution of the present invention are explained:

production and component content of red mud:

the red mud is industrial solid waste discharged after alumina is extracted from bauxite, and is named because the red mud has a large iron oxide content and is similar to red soil in appearance. The chemical component in bauxite with red mud is mainly Al₂0₃、SiO₂、Fe₂O₃、TiO₂. The red mud is classified into Bayer because the aluminum-silicon ratio in bauxite is different and the refining method of alumina is different, thus the red mud is classified into BayerProcess red mud and sintering process red mud. For low alumina-silica ratio soil ores, Bayer process technology is generally adopted to refine alumina: NaOH reacts with Al in bauxite under the conditions of high temperature and high pressure₂0₃Reacting to generate water-soluble sodium aluminate (NaO)₂·Al₂O₃) After the solution is separated from the residue, Al (OH) is added₃As seed crystal, stirring for a long time, and adding NaO₂·Al₂O₃Decompose to separate out Al (OH)₃Cleaning, and calcining at 950-1200 ℃ to obtain Al₂O₃And (5) finishing. The residue after the separation from the solution is the Bayer process red mud. SiO in ore₂Conversion to sodalite (Na)₈Al₆Si₆O₂₄(OH₂) Sodium aluminosilicate (Na) hydrate₂O·Al₂O₃·2SiO₂·χH₂O), and is discharged together with the red mud. To remove TiO₂、SiO₂Of equal impurities, accelerating Al₂O₃Elution of (2), reduction of Al₂O₃And loss of NaOH, quicklime (CaO) was added to the manufacturing batch. TiO 2₂Reacting with CaO to generate calcium titanate (CaTiO)₃)；SiO₂With Al₂O₃Reacting with CaO to generate hydrated calcium aluminosilicate (CaO. Al)₂O₃·2SiO₂·χH₂O) and hydrated garnet (3 CaO. Al)₂O₃·3SiO₂·χH₂O). These produced minerals also become part of bayer process red mud. 75-80% of scandium reserves in the world are accompanied in bauxite, in the process of producing alumina by Bayer process, when the bauxite is in alkaline dissolution, lanthanide elements such as Fe, Ca, Si, Mg, Ti, Sc and the like are remained in red mud to be enriched due to the large dissolution of alumina, more than 98% of lanthanide elements such as Ti, Sc and the like in the bauxite are enriched in the red mud, and Sc thereof is enriched in the red mud₂O₃The content of the oxide of the lanthanide can reach more than 100g/t, even as high as 200 g/t; TiO 2₂The content of the red mud is higher.

Table 1: the contents of all elements in the red mud, the contents of main chemical components% of the Bayer process alumina red mud are as follows:

the process method for producing inorganic fibers by utilizing red mud comprises the following steps:

(1) the method mainly comprises the following steps: rock wool produced by red mud is used as a main material, the red mud is used for burdening and stirring, and is then prepared into a spherical block shape for solidification at high pressure, the spherical block material is melted at high temperature by an electric melting furnace to form molten liquid, the electric melting furnace adopts a graphite electrode, the graphite electrode is always in a consumption state when the electric melting furnace runs, about 3-5kg of the graphite electrode is consumed by each ton of molten liquid, and carbon of the graphite electrode just plays a role of a reducing agent on iron, so that the upper part of the molten liquid in the melting state is inorganic fiber melt, and the inorganic fiber is generated by a centrifugal machine through spinning to prepare rock wool series products; except for the oxide of partial iron in the red mud entering the inorganic fiber, the lower part of the molten liquid is iron melt, and the redundant iron is reduced into simple substance iron for iron extraction treatment. The electric melting furnace is designed to produce iron without affecting cotton discharge, the cotton discharge does not affect iron discharge, and the electric melting furnace is suitable for long-term continuous operation and convenient for automatic control. No tailings, tail gas, dust and waste water are produced in the production process, no secondary pollution is caused to the environment, the comprehensive utilization of the red mud is realized, and rock wool series products with high added values can be produced. In the process of producing rock wool by using red mud, Si, Ca, Fe, Al, Na and Mg element resources in the red mud are fully utilized, so that more than 70 percent and 3 percent of cotton dust and leftover materials of rock wool can be produced, 10 percent of simple substance iron, 12 percent of loss on ignition and about 3 percent of slag ball waste materials can be fully recycled.

Table 2: rock wool produced by red mud with main chemical component content

Composition of ingredients	SiO2	Fe2O3	FeO	Al2O3	CaO	Na2O	K2O	MgO	TiO2
										Red mud rock wool	35-37	3-4	11	17-20	17-22	3-5	0.1-0.3	1-2	1.4

(2) And (4) conclusion: through the analysis of the chemical composition content of rock wool produced by red mud, in the process of producing rock wool by using red mud, rock wool melt is melted at high temperature by an electric heating furnace, slag balls thrown out in the fiber forming process of the rock wool melt by a centrifugal machine and falling into a pit and slag ball waste materials thrown out by a cotton collecting device and elemental iron in the red mud automatically reduced from the bottom of the high-temperature electric melting furnace are graded, classified and layered in the process of producing rock wool by using red mud, and titanium, scandium and rare metal oxides are gradually enriched in the generated slag ball waste materials of about 3 percent. And then the slag ball waste enriched with titanium, scandium and rare metal oxides is subjected to fractional extraction, which is a scheme for extracting titanium, scandium and rare metal oxides in optimized industrial production.

(3) The significance of extracting the titanium and scandium rare metal oxides from the slag ball waste is as follows:

the above simply shows that in the process of producing rock wool by using red mud, the Si, Ca, Fe, Al, Na and Mg element resources in the red mud are fully utilized, and each ton of red mud can be used for producing over 70 percent and 3 percent of cotton dust of rock wool, fully and repeatedly utilizing leftover materials, 10 percent of simple substance iron, 12 percent of loss on ignition and about 3 percent of slag ball waste materials. The following is an important introduction: iron oxide in the red mud is reduced into iron and extracted, and titanium, scandium and rare metal oxides are enriched in the slag ball waste without being reduced. The production of slag ball waste materials enriched with rare metal oxides such as titanium, scandium and the like is as follows: a process method for producing inorganic fiber by utilizing red mud relates to the field of rock wool production by utilizing red mud. The method mainly comprises the following steps: red mud is used as a main material, added with ingredients, mixed evenly and pressed into spherical materials; naturally airing and curing; melting the spherical materials at high temperature through an electric melting furnace to form molten liquid; the upper part of the molten liquid is inorganic fiber solution, and the inorganic fiber is generated by spinning of a centrifugal machine; and (4) iron solution is arranged at the lower part of the molten liquid, and iron extraction treatment is carried out. Realizes the comprehensive utilization of the red mud and can produce rock wool series products with high added value. Meanwhile, through research and analysis on the components of the rock wool produced by the red mud, see table 3, it can be known that the rock wool does not contain titanium, scandium and lanthanide oxides, according to the law of conservation of material, rare metal oxides in the red mud are naturally enriched in slag ball waste materials which are thrown out in the processes of high-temperature melting of red mud ingredients by an electric melting furnace and fiber forming by a centrifugal machine and fall into a pit and slag ball waste materials which are thrown out by a cotton collecting device, titanium, scandium and lanthanide oxides in the slag ball waste materials are higher than hundreds of times of the content of the red mud, the slag ball waste materials which are enriched in titanium, scandium and lanthanide oxides are all naturally and unintentionally enriched in the process of producing the rock wool by the red mud, and any cost for producing the rock wool by the red mud is not increased. The slag ball waste accounts for about 3 percent of the total amount of the ingredients, and one production line can generate kiloton slag ball waste every year. The content analysis of the slag ball waste shows that the content of only two rare metal oxides of scandium and titanium in each ton of slag ball waste can respectively reach 0.03 percent and 6-10 percent, and the contents are shown to be considerable wealth!by classification and extraction! Therefore, the development of a new process method for recovering scandium, titanium and lanthanide oxides from the red mud of alumina has important industrial, scientific and national defense significance.

Table 3: the slag ball waste material produced in the process of producing rock wool by utilizing red mud comprises the following main chemical components in percentage by weight:

composition of ingredients	SiO2	Fe	CaO	TiO2	Sc2O3Isolanthanides
						Slag ball waste	3-5	80-85	5	6-10	0.03

Example 1

Production of rock wool from red mudThe device for extracting rare metal oxide from slag ball waste produced in the process specifically comprises the following steps: comprises a slag ball waste material to-be-treated storage bin 1, wherein the volume of the to-be-treated storage bin is generally 50-500m³The bin to be treated is in a hopper shape, is supported by a steel bracket, is open at the upper part, and is provided with a discharge port 11 at the lower part, and the discharge port 11 is butted with the feed end of an automatic belt conveyor I21; discharge gate 11 sets up in 1 side below of feed bin to be treated, establishes electromagnetic shaker 12 near this discharge gate 11, prevents that pellet waste from arching in the feed bin to be treated 1, realizes the even ejection of compact of pellet waste of feed bin discharge gate to be treated.

The discharge port 11 of the bin to be treated is butted with the feed end of an automatic belt conveyor I21, the automatic belt conveyor I21 is connected with a magnetic separator I3, the nonmagnetic material outlet 31 of the magnetic separator I is butted with the feed end of an automatic belt conveyor II 22, the automatic belt conveyor II 22 is connected with a double-stage hammer crusher 4, the crushed slag ball outlet 41 of the double-stage hammer crusher 4 is butted with an automatic belt conveyor III 23, the automatic belt conveyor III 23 is connected with the bin of a super-dry magnetic separator 5, the bin of the super-dry magnetic separator is butted with a feeding device 6, the feeding device 6 adopts a vibrating mode, crushed slag balls are uniformly dispersed through gravity and vibration, and the adhered or wrapped magnetic substances are basically dispersed.

The feeding device 6 is matched with the magnetic roller 7, and a brush 71 matched with the magnetic roller 7 is arranged; the magnetic material brushed by the brush 71 is automatically separated from the magnetic material outlet, the brush brushes the magnetic material adsorbed on the surface of the magnetic roller, then the magnetic material is automatically separated from the magnetic material outlet 73, and the slag ball crushed aggregates containing titanium, scandium and lanthanide oxides are automatically separated from the nonmagnetic material outlet 72 of the super-dry magnetic separator. The nonmagnetic material outlet 72 of the super-strong dry magnetic separator is butted with the feeding end of an automatic belt conveyor IV 24, the automatic belt conveyor IV 24 is connected with a crushed aggregate turnover bin 8, and the volume of the crushed aggregate turnover bin 8 is generally 10-100m³The turnover bin is in a hopper shape, is supported by a steel bracket and is opened above the turnover bin, the materials are fed from the upper part by a belt conveyor, and a discharge hole 81 of the crushed material turnover bin for slag balls is arranged at the lower end of the turnover binThe material outlet is communicated with a feed inlet of the single-tube type spiral feeder 9, so that uniform material discharging below the turnover bin can be realized through regulation and control of the single-tube type spiral feeder.

The discharge hole 81 of the crushed slag material turnover bin is arranged at the lower end and is communicated with the feed hole of a single-tube type spiral feeder 9, the single-tube type spiral feeder 9 detects the weight of the crushed slag materials passing through a weighing bridge, and the tail part of the single-tube type spiral feeder is provided with a digital speed sensor; the digital speed measuring sensor continuously measures the running speed of the feeder, the pulse output of the speed sensor is in direct proportion to the speed of the feeder, the speed signal and the weight signal are sent to the feeder controller together, and a microprocessor in the controller processes the speed signal and the weight signal to generate and display the accumulative amount/instantaneous flow. The flow is compared with the set flow, and the output signal of the controller controls the frequency converter to change the driving speed of the conveyor, so that the flow of the crushed slag balls on the single-tube type spiral feeder is changed, the set flow of the crushed slag balls is approached and maintained, and the requirement of quantitative conveying is met.

The single-tube type spiral feeder 9 is in butt joint with a stainless steel net box 10, the stainless steel net box 10 is an acid-base-resistant and high-temperature-resistant stainless steel net box, a 316L thickened stainless steel tube is welded into a rectangular box frame with an opening at the upper part, and two balance hoisting points are arranged on the box frame; furthermore, the periphery and the bottom surface of the stainless steel box body frame are welded to the inner side of the stainless steel frame by using 316L large-hole stainless steel nets; so as to be convenient for supporting outside the stainless steel net box; preferably, the bottom of the net cage is additionally provided with a support and an inclined pull rod, so that the mechanical strength of the net cage is increased, and the deformation of the stainless steel net is prevented when the internal pressure of the net cage is large; further preferably, the rectangular box frame is preferably 2m long, 0.6m wide and 1m high; preferably, the diameter of the meshes of the 316L stainless steel used for the periphery of the box frame is 0.5-1cm, the diameter of the meshes is 2-3mm, the diameter of the meshes of the bottom surface of the box is 0.5-1cm, and the diameter of the meshes is 3-5 mm. Welding the periphery and the bottom surface of the stainless steel box body frame to the inner side of the large-hole stainless steel net by using 316L small-hole stainless steel nets so as to prevent the small-hole stainless steel nets from seriously deforming when the internal pressure of the net cage is high; preferably, the stainless steel meshes of the small holes on the periphery of the box frame and the bottom of the box are 150-200 meshes, and the diameter of the mesh is 0.1-0.5 mm.

This stainless steel net box 10 is hoisted by driving formula electron lifting hook balance I101, still includes separation tank and acidolysis pond, stainless steel net box arrange separation tank and acidolysis in the pond in proper order.

The stainless steel net box is arranged in the separation tank; the separation tank 91 is formed by welding 316L stainless steel plates with acid and alkali corrosion resistance, high temperature resistance, high tensile and compressive strength, easy welding and low overheating sensitivity. The separation tank is a rectangular box body with an upper opening welded by 316L stainless steel plates, the general size of the rectangular box body is preferably 5m long, 1m wide and 1.3m high, the thickness of the 316L stainless steel plates on four sides is 2-5mm, and the thickness of the 316L stainless steel plates on the bottom is 5-10 mm. Further preferably, the electric heating devices 93 are uniformly arranged under the rectangular box body of the separation tank, so as to provide required temperature to the whole bottom surface of the rectangular box body. Still be provided with automatic weighing device I under 316L stainless steel separation tank box, automatic weighing device I is a high speed, high accuracy examine heavy equipment on line, and the leachate weight that mainly used on-line measuring separation tank box includes the box is inside can automatic, quick, dynamic, accurate, real-time detection, utilizes the intelligence of electronic computer to increase the function of weighing display controller with electronic computer combination, realizes quick accurate digital display. The automatic weighing device I is added with the functions of reasoning, judgment, self diagnosis, self adaptation, self organization, memory, printing and the like on the basis of the original functions.

The traveling type electronic hook scale I is composed of an electronic hook scale and a traveling crane, an upper hook of the electronic hook scale is hung with a hook of the traveling crane, and the traveling crane can drag the hook to move up and down and left and right. Preferably, the driving type electronic hook scale i is a wireless transmission type electronic hook scale, and comprises a weighing sensor, a scale body and a weighing display, wherein a microprocessor is adopted for sampling and data processing, the weighing sensor and the scale body are independent unit elements, the weighing display is another independent unit element, and no electric wire or other mechanical connection exists between the two unit elements. Preferably, the weighing sensor and the scale body unit element are hung on a lifting hook of the hoisting machine, a 6V/4AH sealed rechargeable battery is arranged in the weighing sensor and the scale body unit element, and the rechargeable primary battery can be continuously used for 40 hours; the weighing display unit element is arranged on a ground operation platform, and the distance between the operation platform and the hoisting machinery site can reach 100 m. When weighing, the weight electric signal is transmitted in the form of code carrier wave through the weighing sensor and the radio transmission device on the scale body unit, the receiving device on the weighing display controller unit receives the signal and sends the signal to the microprocessor for processing, and the microcomputer network displays the weight of the object to be weighed or prints and records. The reading can be stabilized within 3-5 seconds when weighing. Preferably, the range of the traveling type electronic hook scale is 1.5T-2T, the error sensing quantity is 0.1kg, the built-in antenna of the electronic hook scale has the use temperature of less than or equal to 90 ℃ within 20 ℃, the battery voltage is automatically indicated when the electronic hook scale is started or shut down, overload and battery low voltage alarm are carried out, the use safety is ensured, any weight value is corrected, and the division value selection is displayed. Further preferably, the electronic hanging scale is ensured to be used in various occasions by automatic peeling, the electronic hanging scale enters a power saving mode after being statically loaded for 5 minutes when being used, and the electronic hanging scale can be automatically shut down after being statically loaded for 30 minutes, so that the battery damage caused by human negligence is avoided. The palm type remote controller is convenient to operate, and the crane can be operated within a distance of 10 meters to enable the lifting hook to move up, down, left and right. The electronic hanging scale takes care of when in use: when the electronic hanging scale works in a high-temperature environment, the distance between the bottom surface of a lifting hook of a scale body and a hung heat source is required to be more than 1.6m, and the temperature of a lifted object is not more than 180 ℃. A travelling electronic crane scale I is supported by a workshop steel frame, is arranged above a 316L stainless steel separation tank box body, and monitors the leaching amount of suspended 1 unit of slag ball crushed aggregates, calcium, scandium and lanthanide in hydrochloric acid leaching liquid at any time.

The stainless steel net box from the separation tank is placed in the acidolysis tank by a travelling electronic hook scale II, the acidolysis tank is welded into a rectangular box body with an upper opening by adopting 316L stainless steel plates, the thickness of the 316L stainless steel plates on four sides is 3-5mm, and the thickness of the 316L stainless steel plates on the bottom surface is 5-10 mm; more preferably, the rectangular box body of the acidolysis tank is suitable for being 3m long by 1m wide by 1.3m high, and is designed by mainly considering that the liquid-solid ratio L/S of the high-concentration sulfuric acid leachate and the waste residue acidified by hydrochloric acid is 3: 1. Namely, the acidolysis tank is welded by 316L stainless steel plates which require acid-base-resistant corrosion-resistant property, high temperature resistance, high tensile strength and compressive strength, easy welding and low overheating sensitivity. Furthermore, the electric heating devices 93 are uniformly arranged under the rectangular box body formed by welding the stainless steel plates in the acidolysis tank, so that the whole bottom surface of the rectangular box body can be uniformly heated. Still be provided with the automatic weighing device under 316L stainless steel acid hydrolysis pond box, the automatic weighing device is a quick, the online check weighing equipment of high accuracy, and the mainly used on-line measuring acid hydrolysis pond box includes the inside leachate weight of box, can be automatic, quick, dynamic, accurate, real-time detection, and with the electronic computer combination of automatic weighing device I, the intelligence that utilizes electronic computer increases the function of weighing display control ware, realizes quick accurate digital display. The automatic weighing device is added with the functions of reasoning, judgment, self diagnosis, self adaptation, self organization, memory, printing and the like on the basis of the original functions.

The acidolysis tank is used for continuously acidolyzing the residues treated by the separation tank to obtain titanium and silicon oxides.

The parameter requirement of the driving type electronic hook scale II is the same as that of the driving type electronic hook scale I101; the travelling electronic hook scale is supported by a workshop steel frame and is arranged above a 316L stainless steel acidolysis tank box body to monitor the leaching amount of titanium and silicon residues leached in high-concentration sulfuric acid leachate at any time.

Example 2

A device for extracting rare metal oxide from slag ball waste generated in the process of producing rock wool by using red mud comprises the following steps:

1. the slag ball waste realizes the complete separation of iron:

(1) and (4) sending the collected slag ball waste into a slag ball waste bin to be treated by using a forklift. The volume of the material bin to be treated is generally selected to be 50-500m³The utility model discloses a waiting to handle feed bin, including waiting to handle feed bin, steel support, the feed bin is equipped with the discharge gate below, and the discharge gate is equipped with the electromagnetic valve, and the electromagnetic valve is equipped with the discharge gate, and the discharge gate is equipped with the electromagnetic valve, and the. The slag ball waste material is sent into a magnetic separator I for roughing through an automatic belt conveyor I to carry out the first-time separation of iron and slag ballsAnd (4) separating iron from the magnetic material outlet automatically, and stacking the iron for sale by using a forklift. After the slag ball waste is magnetically separated and deironized by the magnetic separator 1, the residual slag ball waste is automatically separated from a nonmagnetic material outlet of the magnetic separator I, and titanium, scandium and lanthanide oxides in the slag ball waste after the first magnetic separation are hundreds of times higher than the content of red mud.

(2) Crushing the slag balls after the first magnetic separation iron extraction. And the slag ball waste after the first magnetic separation contains a small amount of iron and slag ball waste enriched with high-content titanium, scandium and lanthanide oxides, and is sent into a hopper of a two-stage hammer crusher through an automatic belt conveyor II, and the slag ball waste is crushed by the two-stage hammer crusher. Among them, the two-stage hammer crusher is also called a two-stage crusher, a two-stage sieve-bottom-free crusher, etc. Although the double-stage pulverizer has no sieve bottom, the upper and lower two-stage rotors are adopted for pulverization, the discharge granularity is more uniform and is ultrafine, and the granularity can be controlled to be about 2 millimeters. The slag ball waste material gets into broken intracavity from the feed inlet, and first group tup is constantly turned downwards anticlockwise, beats the material, smashes mutually, reaches the hammer powder material, and the effect of material powder material gets into the second and organizes the tup and pat repeatedly, and two sets of tups carry out high-speed patting formula to the material and smash, discharge in the tup gap after the comminuted reaches certain fineness to guarantee the fineness of ejection of compact granularity. Double-rotor upper and lower two-stage pulverizer: the two sets of rotors which are mutually connected in series enable the materials crushed by the upper rotor to be crushed again by the hammer heads of the lower rotor which rotates at a high speed, and the materials in the inner cavities collide with each other at a high speed and are crushed mutually, so that the effects of hammering the powder materials and feeding the powder materials are achieved, and the materials are directly discharged.

(3) And carrying out magnetic separation for the second time to extract iron. And sending the crushed slag balls containing a small amount of iron into a bin of a super-strong dry magnetic separator for fine separation through an automatic belt conveyor III. The crushed slag balls fall into a uniform-speed feeding device through a bin, and the materials and the magnetic substances are subjected to gravity and vibration in a vibration mode before entering a magnetic separation area through the feeding device, so that the adhered or wrapped magnetic substances are basically in a dispersion state. And can be even send to the magnetic separation region, receive gravity and magnetic field effect in the magnetic separation district of equipment under, utilize the magnetism difference of material to have different movement tracks to realize the separation, magnetic substance is adsorbed and is rotated to reach the concentrate district on the magnetic roll surface, and the brush takes off the magnetic material brush that adsorbs on the magnetic roll surface, and iron exports autosegregation from the magnetic material. Through secondary strong magnetic separation of iron, the slag ball crushed material has no iron component basically, because the iron is dissolved in hydrochloric acid, the purpose is to prevent interference during scandium extraction; because the oxides of titanium, scandium and lanthanide have no magnetism in the slag ball crushed aggregates, the oxides are automatically separated from the nonmagnetic material outlet of the super-strong dry magnetic separator and fall above the feeding end of the automatic belt conveyor, and the slag ball crushed aggregates are sent into a slag ball crushed aggregate turnover bin for standby application through the automatic belt conveyor. The content of scandium and lanthanide element oxides of the slag ball crushed materials after the iron is removed through the second time of fine selection is more than one hundred times of that of the red mud. Through two times of magnetic separation, the content of the slag ball crushed material can reach 10-20% only by considering titanium metal oxide, and the content of scandium and rare metal oxide can reach 0.3%.

2. Feeding the crushed slag balls into a crushed slag ball turnover bin:

and feeding the crushed slag balls subjected to iron extraction twice into a crushed slag ball turnover bin. The volume of the turnover bin for the crushed slag balls is generally 10-100m³The turnover bin is in a bucket-shaped design, is supported by a steel bracket, is open on the upper side, is fed from the upper side by a belt conveyor, is provided with a discharge port below, and is communicated with a feed inlet of the single-tube type spiral feeder, so that uniform discharge below the turnover bin can be realized by regulating and controlling the single-tube type spiral feeder; ② a single-tube type spiral feeder. The single-tube screw feeder detects the weight of the crushed slag balls through a weighing bridge frame, a digital speed sensor is arranged at the tail part of the single-tube screw feeder and continuously measures the running speed of the single-tube screw feeder, the pulse output of the speed sensor is in direct proportion to the speed of the single-tube screw feeder, a speed signal and a weight signal are sent to a controller of the single-tube screw feeder together, and a microprocessor in the controller processes the speed signal and the weight signal to generate and display accumulative amount/instantaneous flow. The flow is compared with the set flow, the output signal of the controller controls the frequency converter to change the driving speed of the conveyor, so that the flow of the crushed slag balls on the single-tube type spiral feeder is changed, and the set flow of the crushed slag balls is approached and maintained, thereby realizing the purpose ofThe quantitative conveying requirement is met. The single-tube spiral feeder can be designed into horizontal conveying, inclined conveying, vertical conveying and the like according to the use requirement, and is stable in feeding, low in cost, environment-friendly and convenient for programmed operation. When the single-tube type spiral feeder is required to work, the crushed slag balls fall into a feed inlet of the single-tube type spiral feeder by means of gravity, the crushed slag balls control the discharge amount by controlling the rotation speed of the single-tube type spiral feeder, and the purposes of adjustable loading amount of the stainless steel mesh box and limited standard loading are achieved.

Putting the crushed slag balls into a standard stainless steel net box and sending the crushed slag balls into a separation tank:

and (3) loading the crushed slag balls in the crushed slag turnover bin into stainless steel net cages by a single-shaft screw conveyor for automatic weighing, wherein the weight of the crushed slag balls loaded into each stainless steel net cage is 0.5-1T and is 1 unit. Then the stainless steel net cage is lifted by a lifting hook of a travelling electronic hook scale and sent into a separation tank with hydrochloric acid leaching liquid, and titanium, silicon (SiO2), calcium and lanthanide rare earth elements are separated by grades. Stainless steel net cage. Acid and alkali-resistant high temperature resistant stainless steel net cage adopts 316L thickening stainless steel pipe to weld into the open rectangle box frame in top, will be provided with two balanced hoisting points on the box frame, and the general size of rectangle box frame is suitable at long 2m wide 0.6m high 1m, mainly designs according to the size of separation tank, can become simultaneously under two stainless steel net cages of holding under the sufficient condition in space in the separation tank. The periphery and the bottom surface of the stainless steel box body frame are welded to the inner side of the stainless steel frame through 316L large-hole stainless steel nets, so that the stainless steel net box is convenient to support outside, and in order to increase the mechanical strength of the net box, particularly the bottom of the net box, support and inclined pull rods can be additionally arranged, so that the deformation of the stainless steel nets when the pressure in the net box is large is prevented. The diameter of the meshes of the 316L stainless steel used for the periphery of the box body frame is 0.5-1cm, the diameter of the meshes is 2-3mm, the diameter of the meshes of the bottom surface of the box body is 0.5-1cm, and the diameter of the meshes is 3-5 mm. And the periphery and the bottom surface of the stainless steel box body frame are welded to the inner side of the large-hole stainless steel net through 316L small-hole stainless steel nets, so that the small-hole stainless steel nets are prevented from seriously deforming when the pressure in the net cage is high. The stainless steel meshes of 150 meshes and 200 meshes are arranged around the box frame and on the bottom surface of the box, and the diameter of the mesh is 0.1-0.5 mm. In order to increase the contact area between the leaching solution and the crushed slag balls in the stainless steel net cage, shorten the leaching time and improve the reaction speed and the leaching rate, a leaching solution permeable layer is additionally arranged in the middle of the stainless steel net cage along the length direction so as to ensure that the crushed slag balls in the net cage are fully contacted with the leaching solution. The stainless steel net cage has at least 6-8 production lines for normal circulation. The designed capacity can hold 0.5-1T crushed slag balls. Therefore, the "1 unit" of the shot waste is defined as 0.5 to 1T. And a separation tank. The separation tank is formed by welding 316L stainless steel plates which have the advantages of acid and alkali corrosion resistance, high temperature resistance, high tensile and compressive strength, easy welding and low overheating sensitivity. A316L stainless steel plate is welded into a rectangular box body with an upper opening, and the general size of the rectangular box body is preferably 5m in length, 1m in width and 1.3m in height. The thickness of the four 316L stainless steel plates is 2-5mm, and the thickness of the bottom 316L stainless steel plate is 5-10 mm. The size of the separation tank is designed by mainly considering the liquid-solid ratio L/S of the hydrochloric acid leaching solution and the slag ball crushed material to be 5: 1. An electric heating device is uniformly arranged below a rectangular box body formed by welding stainless steel plates in the separation tank, and the bottom surface of the whole rectangular box body can be uniformly heated at the temperature of 60-90 ℃ required by the reaction in the early scandium leaching process by hydrochloric acid; in the extraction of calcium chloride in the middle stage, uniform heating is needed to be carried out when the calcium chloride is heated to 260 ℃ by a heating device under a box body; after the later hydrochloric acid leaching solution is added with sodium hydroxide solution to generate hydroxide precipitate and remove brine, the hydroxide precipitate is heated through the lower part of the box body, so that the burning temperature is 600-. And thirdly, an automatic weighing device. Still be provided with automatic weighing device I under 316L stainless steel separation tank box, automatic weighing device is a high speed, high accuracy on-line check weighing equipment, and the leachate weight that mainly used on-line measuring separation tank box includes the box is inside can automatic, quick, dynamic, accurate, real-time detection, utilizes electronic computer's intelligence to increase the function of weighing display controller with electronic computer combination, realizes quick accurate digital display. The automatic weighing device is added with the functions of reasoning, judgment, self diagnosis, self adaptation, self organization, memory, printing and the like on the basis of the original functions. Fourthly, the driving type electronic crane scale. The wireless driving type electronic hook scale 1 comprises an electronic hook scale and a driving vehicle, wherein an upper hook of the electronic hook scale is hung with a driving hook, and the driving vehicle can drag the hook to move up and down and left and right. The travelling electronic hook scale is a wireless transmission electronic hook scale and consists of a weighing sensor, a scale body and a weighing display. And a microprocessor is adopted for sampling and data processing. The weighing sensor and the scale body of the scale are independent units, and the weighing display controller is another independent unit. There is no electrical wire or other mechanical connection between the two elements. The weighing sensor and the scale body unit element are hung on a lifting hook of a hoisting machine, a 6V/4AH sealed rechargeable battery is arranged in the weighing sensor and the scale body unit element, and the rechargeable primary battery can be continuously used for 40 hours; the weighing display unit element is arranged on a ground operating platform. The distance between the operating platform and the hoisting machinery can reach 100 m. When weighing, the weight electric signal is transmitted in the form of code carrier wave by means of weighing sensor and radio transmission device on the scale body unit, and the receiving device on the weighing display unit receives the signal and sends it to microprocessor for processing, and the microcomputer network can display the weight of the weighed material or print record. The reading can be stabilized within 3-5 seconds when weighing. The measuring range is 1.5T-2T, and the error sensing quantity is 0.1 kg. The built-in antenna of the travelling electronic hook scale has the use temperature range of less than or equal to 90 ℃ at 20 ℃, and can automatically indicate the voltage of the battery, alarm the overload and the low voltage of the battery when the crane is started or shut down, ensure the use safety, correct any weight value and select the division value. Automatic peeling ensures that the electronic hanging scale is used in various occasions. When the device is used, the device is statically loaded for 5 minutes and enters a power saving mode. The battery can be automatically shut down after 30 minutes of static load, and the battery damage caused by human negligence is avoided. The palm type remote controller is convenient to operate, and the crane can be operated within a distance of 10 meters to enable the lifting hook to move up, down, left and right. The driving type electronic hook scale takes care of when in use: when the electronic hanging scale works in a high-temperature environment, the distance between the bottom surface of a lifting hook of a scale body and a hung heat source is required to be more than 1.6m, and the temperature of a lifted object is not more than 180 ℃. The wireless driving type electronic crane scale 1 is supported by a workshop steel frame, is arranged above a 316L stainless steel separation tank box body, and monitors the leaching amount of suspended 1 unit of calcium, scandium and lanthanide in hydrochloric acid leachate at any time.

Factors influencing the leaching rate and the separation of titanium, silicon (SiO2), scandium and lanthanide metal oxides:

(1) research results show that the factors influencing the leaching rate of the rare earth in the separation tank are the leaching temperature, the hydrochloric acid concentration, the ingredient liquid-solid ratio and the leaching time in turn. When the concentration of the hydrochloric acid serving as a leaching agent is 6mol/L, the liquid-solid ratio L/S is 5:1, the reaction temperature is 60-90 ℃, the reaction time is 2-3h, the leaching rate of scandium can reach more than 98% under the condition of slow stirring, and calcium and lanthanide rare earth elements are leached together and enter the hydrochloric acid leaching solution in the process of leaching scandium by hydrochloric acid. Most of scandium, calcium and rare earth element metals enter the hydrochloric acid leaching solution in the form of ions. Because titanium and silicon (SiO2) are insoluble in low-concentration hydrochloric acid and are enriched in the residues, the residues insoluble in low-concentration hydrochloric acid and enriched in titanium and silicon (SiO2) are separated out from the hydrochloric acid leachate, namely, the separated residues which are leached by hydrochloric acid containing silicon (SiO2) and titanium metal oxide are put into an acidolysis tank together with a stainless steel net cage. The purpose of separating titanium, silicon (SiO2) and scandium and lanthanide metal oxides is achieved.

(2) The hydrochloric acid leaching solution reaches the limit of a saturated state. In the actual production process, the crushed slag balls contained in the stainless steel net cage of 1 unit are repeatedly leached in the separation tank and the hydrochloric acid leaching solution under the conditions for many times, in order to reduce the leaching time in the leaching process, a wireless controller can be used for controlling the wireless crane electronic hook scale 1 lifting hook stainless steel net cage, the wireless crane electronic hook scale 1 lifting hook stainless steel net cage slowly and repeatedly moves up and down in the hydrochloric acid leaching solution every 5-10 minutes, and the crushed slag balls of 1 unit in the stainless steel net cage are driven to repeatedly move up and down in the hydrochloric acid leaching solution instead of the slow stirring process. Until the hydrochloric acid leaching liquid reaches a saturated state. That is to say, the 1 unit slag ball crushed aggregates and the stainless steel net box at the Nth time are leached under the condition of hydrochloric acid leaching liquid, the weight of the whole box body is not increased through the weighing separation tank, in other words, when the leaching rate of scandium, lanthanide and calcium of the 1 unit slag ball crushed aggregates does not reach the requirement of more than 98%, the hydrochloric acid leaching liquid is proved to be in a saturated state at the moment. In the process of leaching scandium oxide with hydrochloric acid, lanthanide rare earth elements and calcium are also leached together and enter the hydrochloric acid leaching solution in the form of ions.

4. Extracting calcium, scandium and lanthanide metal oxides from hydrochloric acid leaching solution:

(1) and (3) extracting calcium chloride. Extracting calcium chloride from the saturated hydrochloric acid leachate, drying and dehydrating the calcium chloride at 200 ℃ to obtain dihydrate at 200 ℃, and heating to 260 ℃ to obtain white porous anhydrous calcium chloride. In the process of heating and dehydrating the hydrated calcium chloride, partial hydrolysis reaction occurs, so that the product often contains a small amount of CaO impurities. CaCl2 extracted from hydrochloric acid leaching solution: the purity can reach more than 90 percent, and the CaCl2 can be used as a raw material for industrial production of high-purity CaCl 2.

(2) Extraction of scandium and lanthanide metal oxides. The hydrochloric acid leachate containing scandium and lanthanide which is higher in purity and exists in an ionic mode is left in the separation tank after the CaCl2 is extracted, and a hydroxide precipitation method is adopted in the hydrochloric acid leachate to be suitable for separating scandium and lanthanide metal oxides. .

Firstly, separating hydrochloric acid leachate from scandium and lanthanide rare earth elements. Slowly adding 5-10% sodium hydroxide solution into the hydrochloric acid leachate, slowly stirring to generate a large amount of hydroxide precipitate, and slowly adding sodium hydroxide solution into the hydrochloric acid leachate, and slowly stirring until no precipitate is generated in the separation tank after the sodium hydroxide solution is added. At this time, the upper layer liquid in the separation tank is mainly salt hydrate, the upper layer brine is taken out, and the lower layer is the hydroxide precipitate of scandium and lanthanide rare earth elements.

Separating the precipitate from scandium and lanthanide rare earth elements: the total content of scandium and lanthanide rare earth elements in the precipitate can reach 10-20%. The hydroxide precipitates are burnt to remove water at the temperature of 600 ℃ and 800 ℃, scandium oxide is firstly separated out, and lanthanide series rare earth oxide is separated out later.

Separating titanium and silicon oxides in an acidolysis tank:

the factors influencing the separation and leaching rate of titanium oxide in the titanium and silicon residues in the acidolysis tank are as follows in sequence: leaching temperature, sulfuric acid concentration, ingredient liquid-solid ratio and leaching time. The acidolysis tank is formed by welding 316L stainless steel plates which are required to have acid and alkali resistance, corrosion resistance, high temperature resistance, high tensile and compressive strength, easy welding and low overheating sensitivity. A316L stainless steel plate is welded into a rectangular box body with an upper opening, and the general size of the rectangular box body is preferably 3m in length, 1m in width and 1.3m in height. The thickness of the four 316L stainless steel plates is 3-5mm, and the thickness of the bottom 316L stainless steel plate is 5-10 mm. The method is mainly designed by considering the liquid-solid ratio L/S of the high-concentration sulfuric acid leachate to the waste residue acidified by hydrochloric acid as 3:1 parameter. Firstly, an electric heating device is uniformly arranged below a rectangular box body formed by welding stainless steel plates in an acidolysis tank, the bottom surface of the whole rectangular box body can be uniformly heated, and the reaction temperature in the process of leaching titanium by using high-concentration sulfuric acid in the early stage is 60 ℃; and the metatitanic acid is calcined at the later stage at 950 ℃ and 1200 ℃. And secondly, an automatic weighing device II is also arranged below the 316L stainless steel acidolysis tank body, is a quick and high-precision online weight detection device, is mainly used for online detection of the weight of the leachate in the acidolysis tank body including the tank body, can automatically, quickly, dynamically, accurately and real-timely detect the weight of the leachate, is combined with an electronic computer of the automatic weighing device I, and utilizes the intelligence of the electronic computer to increase the function of a weighing display and realize quick and accurate digital display. The automatic weighing device is added with the functions of reasoning, judgment, self diagnosis, self adaptation, self organization, memory, printing and the like on the basis of the original functions. And thirdly, the parameter requirement of the wireless driving type electronic hook scale II is the same as that of the wireless driving type electronic hook scale I, but not the same. And the wireless driving type electronic hook scale II is supported by a workshop steel frame and is arranged above the box body of the 316L stainless steel acidolysis tank to monitor the leaching amount of titanium and silicon residues leached in the high-concentration sulfuric acid leachate at any time.

(1) When the leaching agent is prepared by using 90-95% high-concentration sulfuric acid (H2SO4), the liquid-solid ratio L/S is 3:1, the reaction temperature is 60 ℃, the reaction time is 1H, and the titanium leaching rate can reach more than 95% under the condition of slow stirring, silicon does not react with the high-concentration sulfuric acid solution in the process of leaching titanium by using the high-concentration sulfuric acid solution, silicon (SiO2) residues are directly separated out from the high-concentration sulfuric acid solution, namely, silicon (SiO2) oxide crushed slag is directly separated out, SO that the aim of separating titanium and silicon (SiO2) is fulfilled. Repeatedly leaching titanium and silicon residues with 1 unit in the acidolysis tank and the high-concentration sulfuric acid solution under the conditions. In each '1 unit' residue stainless steel net cage, leachedIn order to reduce the leaching time, a wireless controller can be used for controlling a lifting hook 316L stainless steel net cage of a wireless crane electronic hook scale II, and the lifting hook slowly and repeatedly moves up and down in the sulfuric acid leaching solution every 5-10 minutes to drive 1 unit of residues in the 316L stainless steel net cage to repeatedly move up and down in the sulfuric acid leaching solution, so that the slow stirring process is replaced. Until the high-concentration sulfuric acid leaching liquid reaches a saturated state. That is to say, the Nth leaching of the titanium and silicon residues with the leaching rate of 1 unit is performed under the condition of high-concentration sulfuric acid leaching liquid, the weight of the whole box body is not increased by weighing, that is to say, the leaching rate of the titanium and silicon residues does not reach the requirement of more than 95%, and the high-concentration sulfuric acid leaching liquid is proved to reach the saturated state at the moment. In the process of leaching titanium from the high-concentration sulfuric acid leaching solution, titanium enters the high-concentration sulfuric acid leaching solution in the form of ions, silicon does not react with the high-concentration sulfuric acid solution, and Silicon (SiO)₂) The residue can be directly separated from the high-concentration sulfuric acid leachate through a stainless steel net box. The residue after acid hydrolysis mainly contains SiO₂SiO after the residue is treated₂Accounts for more than 70 percent, and can be mixed with the red mud for reutilization.

(2) And hydrolyzing the titanium sulfate salt solution (the titanium sulfate exists only in the extremely concentrated sulfuric acid) formed by the high-concentration sulfuric acid leachate which reaches a saturated state in the acidolysis tank. The metatitanic acid is prepared by a titanium sulfate hydrolysis method, wherein the hydrolysis method takes formed crystal nuclei as crystal centers, induces and promotes the deposition growth of titanium hydrate ions on the surfaces of the crystal nuclei, and finally forms the metatitanic acid. Then calcining metatitanic acid at 950-₂)。

Although the present invention has been described in detail by referring to the drawings in conjunction with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and substance of the present invention, and these modifications or substitutions are intended to be within the scope of the present invention/any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (26)

1. A device for extracting rare metal oxide from slag ball waste generated in the process of producing rock wool by using red mud is characterized by comprising a slag ball waste to-be-treated bin, wherein a discharge port of the to-be-treated bin is butted with a feed end of an automatic belt conveyor, the automatic belt conveyor is connected with a magnetic separator, a nonmagnetic material outlet of the magnetic separator is butted with the feed end of the automatic belt conveyor, the automatic belt conveyor is connected with a two-stage hammer crusher, a slag ball crushed material outlet of the two-stage hammer crusher is butted with the automatic belt conveyor, the automatic belt conveyor is connected with a bin of a super-strong dry magnetic separator, the bin of the super-strong dry magnetic separator is butted with a feeding device, the feeding device is matched with a magnetic roller, a nonmagnetic material outlet of the super-strong dry magnetic separator is butted with the feed end of the automatic belt conveyor, and the automatic belt conveyor is connected with a slag ball crushed material bin, this sediment ball crushed aggregates turnover storehouse discharge gate setting is at the lower extreme and with the feed inlet switch-on of single-tube screw feeder, this single-tube screw feeder and stainless steel mesh box butt joint, this stainless steel mesh box is hoisted by driving formula electron hook balance, still includes separation tank and acidolysis pond, stainless steel mesh box arrange separation tank and acidolysis in the pond in proper order.

2. The apparatus as claimed in claim 1, wherein the silo to be treated has a volume of 50-500m³The bin to be treated is in a hopper shape, is supported by a steel bracket, and is open at the upper part; further, the discharge gate sets up in pending feed bin side below, establishes the electromagnetic shaker near this discharge gate.

3. The apparatus as claimed in claim 1, wherein the feeding device is configured to vibrate the pieces of ground slag in a manner to achieve uniform dispersion of the pieces of ground slag by gravity and vibration.

4. A device according to claim 1, 2 or 3, characterized in that a brush is provided which cooperates with the magnetic roller.

5. The apparatus as claimed in claim 1, 2 or 3, wherein the volume of the slag ball milling material turnover bin is 10-100m³The turnover bin is in a bucket shape, is supported by a steel support, is opened above the turnover bin, and is fed from the upper part by a belt conveyor, and a discharge port of the crushed slag turnover bin is arranged at the lower end and is communicated with a feed port of the single-tube type spiral feeder.

6. The device as claimed in claim 1, 2 or 3, wherein the single-tube screw feeder measures the weight of the passing slag ball through a weighing bridge, and a digital speed sensor is arranged at the tail part of the single-tube screw feeder.

7. The device as claimed in claim 1, 2 or 3, wherein the stainless steel net cage is an acid-base-resistant and high-temperature-resistant stainless steel net cage, a 316L thickened stainless steel pipe is welded into a rectangular box frame with an upper opening, and two balance lifting points are arranged on the box frame.

8. The apparatus of claim 7, wherein the stainless steel tank frame is welded to the inside of the stainless steel frame with a 316L large-meshed stainless steel net on the periphery and bottom.

9. The device as claimed in claim 7, wherein the bottom of the net cage is additionally provided with a support and a diagonal draw bar.

10. The apparatus of claim 7, wherein the rectangular box frame has dimensions of 2m long by 0.6m wide by 1m high.

11. The device as claimed in claim 7, wherein the periphery of the frame of the box body is welded to the inside of the large-meshed stainless steel net by 316L small-meshed stainless steel nets, wherein the diameter of the 316L stainless steel nets is 0.5-1cm, the diameter of the nets is 2-3mm, the diameter of the meshes on the bottom surface of the box body is 0.5-1cm, and the diameter of the nets is 3-5 mm.

12. The device as claimed in claim 7, wherein the stainless steel meshes with 150 meshes and 200 meshes are arranged around the frame and on the bottom of the box body, and the diameter of the stainless steel meshes is 0.1-0.5 mm.

13. The apparatus of claim 1, 2 or 3, wherein the separation tank is formed by welding 316L stainless steel plates into a rectangular box with an open top, the rectangular box generally having the dimensions of 5m long by 1m wide by 1.3m high, 2-5mm thick stainless steel plates with 316L four sides and 5-10mm thick stainless steel plates with 316L bottom.

14. The apparatus of claim 13, wherein the electric heating means are uniformly disposed under the rectangular box of the separation tank.

15. The apparatus of claim 13, wherein an automatic weighing device is further provided under the 316L stainless steel separation tank box.

16. The apparatus as claimed in claim 13, wherein the electronic crane-type crane scale comprises an electronic crane scale and a crane, an upper hook of the electronic crane scale is hooked with a crane hook, and the crane can drag the hook to move up and down and left and right.

17. The apparatus of claim 13, wherein the traveling type electronic hook scale is a wireless transmission type electronic hook scale, and comprises a weight sensor, a scale body and a weight display, wherein the microprocessor is adopted for sampling and data processing, the weight sensor and the scale body are independent units, the weight display is another independent unit, and no electric wire or other mechanical connection exists between the two units.

18. The device of claim 13, wherein the load cell and the scale body unit are hung on a lifting hook of a lifting machine, a 6V/4AH sealed rechargeable battery is arranged in the device, and the rechargeable primary battery can be continuously used for 40 hours; the weighing display unit element is arranged on a ground operation platform, and the distance between the operation platform and the hoisting machinery site reaches 100 m; when weighing, the weight electric signal is transmitted in the form of code carrier wave through the weighing sensor and the radio transmission device on the scale body unit, the receiving device on the weighing display controller unit receives the signal and sends the signal to the microprocessor for processing, the microcomputer network displays the weight of the object to be weighed or prints the record, and the reading can be stably carried out within 3-5 seconds when weighing.

19. The device of claim 13, wherein the range of the traveling electronic hook scale is 1.5T-2T, the error sensing amount is 0.1kg, the built-in antenna of the electronic hook scale is less than or equal to 90 ℃ within the use temperature range of 20 ℃, the battery voltage is automatically indicated when the crane is started or shut down, the overload and battery low voltage alarm is given, the value of any weight is corrected, and the division value is displayed for selection.

20. The apparatus as claimed in claim 13, wherein the electronic steelyard has an automatic peeling function, and when the apparatus is used, the apparatus is in a power saving mode after being statically loaded for 5 minutes, and can be automatically turned off after being statically loaded for 30 minutes.

21. The apparatus of claim 13, wherein the electronic steelyard is automatically operated by a hand-held remote controller within a distance of 10m to operate the crane to move the hook up, down, left, and right.

22. The apparatus of claim 13, wherein the traveling electronic hook scale, supported by the shop steel frame, is disposed above the 316L stainless steel separation cell housing.

23. The device as claimed in claim 13, wherein the acidolysis tank is a rectangular box body with an open top welded by 316L stainless steel plates, the thickness of the 316L stainless steel plates on four sides is 3-5mm, and the thickness of the 316L stainless steel plates on the bottom is 5-10 mm.

24. The apparatus as claimed in claim 13, wherein the rectangular box of the acidolysis cell has dimensions of 3m long by 1m wide by 1.3m high.

25. The apparatus as claimed in claim 13, wherein the acidolysis cell is provided with electric heating devices uniformly under a rectangular box body formed by welding stainless steel plates.

26. The device as claimed in claim 13, wherein an automatic weighing device is further arranged below the box body of the 316L stainless steel acidolysis tank.

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