CN110479480B - Deep processing technology for high-purity ultra-white potassium feldspar material - Google Patents
Deep processing technology for high-purity ultra-white potassium feldspar material Download PDFInfo
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- CN110479480B CN110479480B CN201910715208.4A CN201910715208A CN110479480B CN 110479480 B CN110479480 B CN 110479480B CN 201910715208 A CN201910715208 A CN 201910715208A CN 110479480 B CN110479480 B CN 110479480B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
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- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
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Abstract
The invention relates to a deep processing technology of a high-purity ultra-white potassium feldspar material, which is implemented by the following key steps: selecting and configuring mineral resources; only screening and no washing are carried out from the stage after coarse breaking to the stage before sanding, so that the loss of fine powder is reduced; rinsing after sanding, if the mica content is high, breaking and sanding are only performed for one-time hydraulic classification rinsing, so that light substances such as mica are floated and separated, and enough upwelling water flows float the mica and the light substances out; the method adopts a secondary grading and falling back precipitation mode to recycle most of fine powder by grading and falling to the ground, so that the powder is kept to be not lost or to be lost to the minimum extent, and the loss of a substance, namely the silicon, the aluminum, the potassium, the sodium and the calcium, which shows the whiteness index is kept to be small. Repeated tests are carried out, and the water-powder slurry ratio is accurately configured; and during magnetic separation, the ultrasonic waves before electric separation vibrate and separate weak magnetic objects. The method has the advantages that high-grade and high-purity ultra-white product materials can be made, and meanwhile, a full physical treatment mode is adopted in the whole process, so that zero emission is realized, no pollution is caused, and the method is environment-friendly.
Description
Technical Field
The invention belongs to the technical field of deep processing of potassium feldspar, and particularly relates to a deep processing technology of a high-purity ultra-white potassium feldspar material.
Background
The potassium feldspar is aluminosilicate mineral of alkali metal or alkaline earth metal such as potassium, sodium, calcium, etc., and is also called feldspar mineral. Potash feldspar (K2O-Al2O3-6SIO2) is usually called orthoclase, belongs to monoclinic system, and is generally meat red, white or gray. The potassium feldspar series mainly comprises orthoclase, microcline feldspar, diaclase feldspar and aluminosilicate minerals.
The potassium feldspar material is mainly used for ceramic glaze materials and green body materials, and accounts for about 30 percent; the basic material for manufacturing the glass accounts for 45-50%, and the high-quality potassium feldspar material has wide requirements in the aspects of manufacturing high-end ceramics, electronic devices and the like, is high-temperature resistant in the aspect of coating large-scale equipment such as ships and wind power equipment and has unique antioxidant effect. Is a material support that is not separable from current and future high-end manufacturing and precision manufacturing.
The special technical process comprises five processes of mineral resource selection, coarse crushing and mineral separation, fine crushing and mineral separation, slurry mixing and modulation and separation of magnetic substances and particles, and solves the technical problem of producing the high-purity ultra-white potassium feldspar material. The technical work indicates that the super white is a material product with the index of whiteness of more than or equal to 85 percent, the high purity indicates that the ferric oxide is less than 0.1 percent, and the whiteness is more than or equal to 80 percent. By-product detection report sheet
For decades, most of potassium feldspar powder materials in China are still in a rough machining state, enterprises producing product materials with the whiteness of about 40% account for more than 70%, enterprises producing products with the whiteness of 65-75% are less than 20%, enterprises capable of producing super-special-grade products with the whiteness of more than or equal to 12%, iron of less than 0.1% and the whiteness of more than or equal to 80% are few, and the long-term, stable and large-scale production can not be realized easily due to the fact that the super-fine-grade products are produced partially and periodically through the excellent raw ore quality and the wet magnetic separation process. The method can produce an ultra-special material product with the potassium content of more than or equal to 12 percent, the iron content of less than 0.1 percent, the whiteness of more than or equal to 85 percent and the whiteness of 92 percent basically.
The production of high-purity and ultra-white products is opposite in the aspect of the overall deep processing technology, and is contradictory in a certain stage mode, and in experiments, ultra-white products cannot be produced when high-purity products are required. The method has high purity, is necessarily exhaustive, and can reduce and remove metal substances and other 'harmful substances' in ore bodies through deep washing and fine selection; and the deep washing mode cannot be carried out in a certain link to keep the proper whiteness of the beneficial components of the minerals. If the essential characteristics of the minerals are not analyzed, and a plurality of tests are not carried out, the unification of high-purity and ultra-white products is difficult to understand. The washing and dressing process is used alone, and a product with high purity and super-whiteness unified cannot be produced.
The deep processing in the general meaning in the industry focuses on the deep processing on mechanical equipment, and the deep processing in the real meaning must start from mineral resources, research on occurrence of the mineral resources and research on composition structure characteristics of mineral substances.
The applicant researches some advanced deep processing enterprises, and exhaustively exhausts the modes of connecting flat-plate magnetic separation equipment, ultralow-temperature vertical-ring magnetic separation equipment and intermittent electromagnetic slurry machines in series and in parallel, the equipment processes already represent the most advanced processes and equipment in China at present, but ideal reduction and removal of metal substances cannot be realized, and the content of the ferric oxide product is 0.15-0.17%, and the whiteness is 58.8-77.6%. The same mineral resource has no high purity, ferric oxide is reduced to below 0.1%, and whiteness is not reduced to above 80%, because the most basic mineral characteristics and rules are ignored when the minds are stared on the equipment, and the links are careless or have no research capability, so that the opportunity of effectively reducing harmful substances is lost, and the luxury arraying equipment has a very common effect.
In the aspect of material ultra-whiteness technical processing, the deep processing thought cannot be completely carried out in a forward direction, and deep washing operation is carried out. The effect of deep washing and concentration is the high purity of the material product, but the deep washing capability is pursued once, especially when the ore is crushed to 50-5 mm, the strong washing cannot be carried out, a part of beneficial substances are lost, the due effect of the mineral composition is damaged, and the formation of the ultra-white material is damaged. When the ore is crushed to be less than 50mm, the smaller the granularity is, the larger the free surface value of the object is, a considerable amount of fine powder is formed in the crushing and is attached to the surface of the object or is accumulated among the blocks and gravels, the fine powder on the surface of the ore blocks and gravels is washed by strong water, the fine powder is not returned once, soil impurities are separated as early as the block size of more than 80mm and the color sorting vibration screening of 3-30 mm, and the washed fine powder is basically a silicon-aluminum-potassium-calcium-sodium substance in the hydraulic washing of 50-3 mm block and particle time period, so that the whiteness is reduced to a certain degree. Therefore, a deep processing method capable of ensuring the high purity of the potassium feldspar and maintaining the whiteness of the potassium feldspar is needed.
Disclosure of Invention
The invention aims to solve the problems, provides a deep processing technology of a high-purity ultra-white potassium feldspar material, solves the problems that the deep processing of the potassium feldspar material is based on finding a method for minerals, high grade is achieved, and a high-purity ultra-white product material is produced, and simultaneously adopts a full physical treatment mode in the whole process, so that zero emission is realized, no pollution is caused, and the environment is protected.
In order to achieve the purpose, the invention provides the following technical scheme:
a deep processing technology of a high-purity ultra-white potassium feldspar material comprises the following steps:
s1: selection and configuration of mineral resources:
selecting mineral resources with main mineral elements of potassium oxide more than 12%, silicon oxide more than or equal to 64%, aluminum oxide more than or equal to 15%, sodium 1-2.5% and calcium less than 2%, wherein the occurrence form of iron substance minerals is in an amorphous grid state; the production of the product is completed by adopting one ore or two kinds of ore;
s2: rough crushing and color sorting processing of a mine source:
a) coarse crushing: the coarse broken gravel degree is controlled to be 30-80 mm, and when the number of mica in the ore is large, the ore can be broken to 10-35 mm for air separation;
b) color selection: ore dressing by combining manual hand dressing and color dressing equipment for removing impurities, and removing over 60 percent of non-potassium feldspar gravel particles in the ore; before the color sorting equipment operates, removing soil and fine mica sheets by using a 3mm roller screen, wherein the color sorting needs to be coarsely broken to the specification of 10-30 mm or 30-50 mm;
s3: sanding and fine breaking in a factory:
conveying the ore to a sand blasting machine through a belt, carrying out magnetic separation through a hanging permanent magnet in the belt conveying process, transferring the ore to fine breaking, sanding and coarse grain breaking of less than 5mm, removing metal objects and carrying out fine breaking;
s4: and (3) hydraulic classification rinsing:
floating, overflowing and separating mica and other light substances from the surface layer of the water surface by utilizing water flow upwelling, removing, recovering all fine mineral powder settled in the water body by adopting a secondary sedimentation mode, and levigating the fine mineral powder and large materials together by the next procedure;
s5: grinding and screening:
conveying the coarse sand to a mill for de-granulation, wherein the de-granulation size is selected between 100-300 meshes according to the requirement;
s6: standard slurry preparation:
controlling the slurry water powder at 75 percent: 25, putting the mixture into a pool, stirring the mixture evenly, and pushing the mixture to magnetic separation equipment through a slurry pump;
s7: vertical ring magnetic separation:
performing the work of separating the first round of magnetic metal objects from the slurry by adopting vertical ring magnetic separation; transferring the slurry with the magnetic substances removed into an intermittent electric slurry separation machine, carrying out electromagnetic separation in a parallel and mass production mode, and separating and removing the magnetic metal substances in a second round;
s8: ultrasonic vibration separation:
pushing the slurry subjected to the secondary magnetic separation to separate magnetic substances into an ultrasonic vibrator, separating most of magnetic substances into slurry liquid through vertical ring magnetic separation and primary electric separation, and vibrating and separating the rest weak magnetic substances and a small amount of fine metal substances attached to the powder into a free state through ultrasonic vibration;
s9: selecting an intermittent electromagnetic slurry machine:
the method of generating strong magnetism to adsorb metal magnetic substances by electrifying and abandoning the magnetic substances into a special container to be transferred by power failure is repeated and circulated, so that the metal substances are separated and reduced; two devices with the same power are connected in series, 2.5T electromagnetic intermittent strong magnetic separation is continuously carried out twice, and the magnetic separation process is ended;
s10: and (3) filtering and dehydrating:
pushing the slurry subjected to the magnetic separation for three times to dehydration filtering equipment for dehydration treatment to enable the powder to be dried from the slurry to the powder, and pushing the slurry to a cold field for water vapor release regulation;
s11: drying and packaging:
conveying the powder in the wet powder cooling field into drying equipment through a belt for drying, cooling and packaging;
s12: and (5) warehousing and storing or shipping.
Furthermore, after the step S2 and before the step S3, the fine ore is screened and not washed after coarse breaking until the step before sanding, so as to reduce the loss of fine powder.
Further, in the step S2, in the process of belt operation, a fan is arranged to blow away mica sheets larger than 3mm at the belt operation transition, and about 60-70% of the mica sheets can be blown away from the ore.
Further, in the step S9, the intermittent electromagnetic slurry separator adopts one high-power vertical-ring magnetic separator and four parallel-serial electric slurry separators, that is, two are connected in parallel and two are connected in series.
Further, in step S8, an ultrasonic vibrator is provided to separate the weak magnetic substance from the powder particle substance, thereby improving the iron removal effect.
Preferably, in the step S7, 2.5T vertical ring strong magnetic separation is used for the neutral ring magnetic separation.
Compared with the prior art, the invention has the beneficial effects that:
the key point of the invention is to select and allocate mineral resources, the determination of high potassium grade is guaranteed in the first step, strong water washing of fine ore is forbidden between coarse breaking and sanding, mica and light impurities are removed by wind power, water slurry concentration is accurately prepared in the slurry mixing procedure after grinding, and ultrasonic vibration is carried out between two kinds of magnetic separation to separate magnetic substances, thereby solving the problem that the deep processing of potassium feldspar materials is based on the method found in minerals to produce high-grade and high-purity ultra-white product materials. The whole process adopts a full physical mode for treatment, no chemical addition is needed, and all equipment in a factory adopts environment-friendly certificate permission; in the process, the sand making equipment is completely and independently closed for negative pressure dust removal, the grinding equipment enters a slurry liquid state for operation, the dehydrated tail mud is stored in a closed mode for secondary utilization, and water circulation treatment is zero in emission, pollution-free and environment-friendly.
Detailed Description
In order to make the technical solutions of the present invention better understood and implemented by those skilled in the art, the present invention is further described with reference to the following specific examples, which are provided for illustration only and are not intended to limit the present invention.
The invention provides a deep processing technology of a high-purity ultra-white potassium feldspar material, which is implemented according to the following steps:
firstly, selecting mineral resources and resource allocation
The grade of the potassium feldspar material is determined by the proportion of three main mineral elements of silicon, aluminum and potassium. Wherein, the contents of silicon and aluminum are matched proper contents, and the content of potassium oxide is an element which plays a leading role in product positioning. The deep processing and washing process is a process of removing harmful impurities, mineral resources with different contents are effectively configured under specific conditions, and the production and processing of the high-end potassium feldspar material are different from the general deep processing, namely, the high-end potassium feldspar material is not prepared from local materials and used for reading dishes and cooking, but is lost selectively and is not lost. The method selects a high-quality mine resource with high potassium substance element content and reasonable silicon, aluminum and potassium composition matching, and is the basis for producing and processing the high-end potassium feldspar material. From the technical point of view, mineral resources with the potassium element grade of more than or equal to 12 percent, silicon 63-70 percent, aluminum of more than or equal to 15 percent, sodium of 1-2.5 percent and calcium of less than 2 percent are selected, the occurrence form of iron substance minerals is just an amorphous grid state, and the iron substance minerals have high iron content and are high potassium minerals occurring in a crystal lattice state, and can also be considered in limited ore matching. The selection of the ore source is that the raw ore which has high content of potassium elements and moderate proportion of potassium, sodium, silicon and aluminum elements and can be effectively separated and removed by a magnetic separation method is selected, and the method is the most basic condition for producing and processing the high-end potassium feldspar material and the first technical procedure of the production and processing process.
Mineral resources are selected, mineral element composition is not only seen, a certain geological mineral exploration capability is required, and the comprehensive team capability can be achieved. The quality of mineral elements in mineral resources is determined and known, and comprehensive balance argument is carried out on occurrence of mineral resource symptoms and mining conditions.
The method not only detects the grade of the ore, but also performs a multi-stage repeated washing test on the ore, and performs a plurality of washing tests by using production equipment, so that the ore can be used as a raw material for producing high-end materials, the process and the capacity are evaluated, a research conclusion is formed, and the first process procedure is completed. The washing and selecting process only starts from mineral analysis test, and the technical process is called to enter the deep processing procedure.
The production of a product can be completed by ore of one mineral resource independently, or can be completed by selecting or purchasing more than two ore configurations, generally completed by one ore or two ore configurations.
Second, rough crushing and color sorting processing of ore source
Coarse crushing and color sorting are placed in a mineral source area, so that the burden of factory processing on the aspect of environmental protection is reduced, and the operation is convenient. After mineral resources are selected, under general conditions, rough crushing is carried out on rough ores to be about 30-80 mm gravels, and fine crushing is facilitated.
Whether the color separation is carried out or not can be determined according to the doping degree of the foreign rock of the surrounding rock and the mineral composition state in the raw ore mining. If color separation is required, the color separation is determined according to the mineral composition state, particularly the occurrence state of mica in the ore, so as to be divided into 3-30 mm specification color separation or crushed to other specification color separation, and the color separation is determined according to the test result. Coarse crushing is the first step in the processing procedure of the powder material of the mineral product, is a pre-step of grinding into powder, and color sorting is to remove over 60 percent of non-potassium feldspar gravel particles in the ore by applying the color difference of the mineral, generally, the color sorting is carried out by sieving to filter out the clay sand below 3mm, so that the purity of the ore is better, and actually, two steps of bulk color sorting and clay sand filtering are carried out. In fact, the ore passes through three ways of crushing, vibrating, color sorting and screening, and the external impurities in the ore are basically removed. In order to obtain better effect, manual color selection is carried out before color selection, and mechanical equipment color selection and manual color selection are the best mode for removing miscellaneous stone and sundries. If the mine is not electrified, the gravel blocks crushed to 3-30 mm can be transported to a factory for color sorting.
The effect of removing more than 85% of miscellaneous stones is difficult to achieve by color selection of mechanical equipment, and manual supplementary selection is performed before color selection according to mineral composition and color selection effect so as to achieve the best ore concentrate degree.
Thirdly, fine breaking by sanding in factory
The ore transported in the factory is transported to a sand blasting machine through a belt, the hanging permanent magnet is used for removing the scattered metal objects lost and dropped into the ore in the construction process in the belt transportation process, the procedure operation of gravel-to-sand is safely carried out, and the operation is carried out from gravel minerals with the particle size of less than 30mm to coarse sand with the particle size of less than 3 mm.
Fourthly, water power classification rinsing
The method is a key process flow which is the most contradictory process flow of high purity quality and ultra-white index requirements and must be weighed. The purpose of rinsing is to remove light substances such as mica and the like, and to reduce the loss of fine powder to the maximum extent. In principle, the upwelling of water flow is utilized to separate and remove the mica and other light matter body drifts, and all fine powder which is precipitated in a water body is precipitated and recovered except the loss of trace fine powder of top-layer drifts, so that a two-stage precipitation mode is adopted in the process, the fine powder is recovered to the maximum extent, the grade of silicon and potassium is not increased by recovering the fine powder, and the influence on the whiteness of the product is reduced to the maximum extent.
If the mica content in the mineral is very low, the rinsing can be avoided in the process.
The mineral composition is such that the mica content is high, and rinsing is necessary, as required for high purity product quality. The rinsing of the key process aims at maximally drifting and separating light substances such as mica and the like and at least losing fine powder.
By lengthening the precipitation distance, separating the flow in boxes, slowing down the flow speed, and adopting a twice precipitation mode, the loss of fine powder is very small. Through setting up reasonable container volume, adjust water pressure and guarantee to gush buoyancy on water, the rinsing separation mica and other light material effects are obvious.
Fifthly, fine grinding and sieving
From fine sand to fine grinding, wet and dry methods are adopted depending on whether the fine grinding is carried out or not, if rinsing is needed, wet grinding processing is carried out, the advantage of grinding by using the ball mill is that continuous operation can be carried out, a ball milling lining and a grinding ball are carried out by using a non-metal body, mechanical iron is basically not added into powder, and the defects that the ball mill is high in energy consumption and low in efficiency and needs a screening process to be complicated are overcome; if rinsing is not needed after fine crushing, vertical grinding is adopted for grain separation, and the advantages of low energy consumption, high efficiency, material passing rate of about 97% in one-time passing, no need of screening and simple process are achieved. However, the vertical mill can only mill dry materials but cannot mill wet materials. Therefore, milling is a simple process, but what way to do is determined by the trade-off between the mineral constituent materials and whether the post-granulation rinse process is required.
Sixthly, standard slurry preparation
The slurry mixing is the most basic condition for determining the effect of the magnetic separation process, is a key process, and the accuracy of the process directly determines the effect of all subsequent magnetic separation and the effect of the whole process. The water-powder ratio is not determined by accurate calculation tests for the hydraulic classification rinsing slurry and the ball milling water material, and the effects of electric separation and magnetic separation iron removal and the productivity effect are directly determined by the slurry water-powder ratio before the working procedure of powder-forming magnetic separation. No matter magnetic separation or electric separation, the powder must be mixed into slurry by water with proper proportion, so that the magnetic separation can be successfully carried out, particularly, the slurry has less concentrated water, the aluminum substance fine powder of the potassium feldspar powder has certain viscosity, the moving resistance of the magnetic object is large, the magnetic object can not move to a specified place within a specified time and is shut down, and the magnetic separation effect is seriously influenced because the magnetic object can only continuously mix with the powder along with wave flow by flow. If the powder is more and less, the thick liquid viscosity is large, the motion resistance of the magnetic object is large, the magnetic operation time is limited, and the magnetic attraction effect is inevitably reduced. According to the test results, the percentage of gouache is 75: 25 is preferred.
Seven, vertical ring magnetic separation
Magnetic separation is a core means for deep processing of non-metal materials. By utilizing the uninterrupted running characteristic of annular magnetic force, the magnetic separation can be carried out by 2.5T gradient high-power operation, and magnetic substances are separated. 2.5T vertical ring high-intensity magnetic separation is a continuous magnetic separation magnetic property process. It features strong magnetic separation of magnetic substance, continuous working and obvious effect. The disadvantage is that the rotating wheel rotates repeatedly on the central line of the container, and the magnetic object which is a little far away is not in time due to the relative 'far distance', and is also flagging and passing the field.
Eighthly, ultrasonic vibration separation treatment
After 2.5T vertical ring magnetic separation and the first electric separation, most of magnetic substances are separated out of slurry liquid. The remaining weakly magnetic material, still mixed in the slurry, also has a small amount of fine metallic material attached to the particles with the fine alumina material. Through ultrasonic vibration, the fine metal objects attached to the powder are separated into free states by vibration, and convenient conditions are provided for improving magnetic separation of magnetic objects by next step of electromagnetic separation.
After the vertical ring magnetic separation, carrying out one-time ultrasonic vibration separation, or carrying out one-time vibration separation again between two times of electromagnetic separation, and determining the effect of the electromagnetic separation after one-time ultrasonic vibration.
Nine, intermittent electromagnetic slurry machine selection (short for electric selection)
An intermittent electromagnetic slurry machine is a method for transferring metal magnetic substances by generating strong magnetism through electrification by an electromagnetic principle and abandoning the magnetic substances into a special container in power failure, and the method is repeatedly circulated, thereby realizing the purposes of separating and removing the metal substances and improving the purity of the materials. The magnetic force of the slurry machine is set at 1.5T, the slurry machine is in strong magnetic operation, and tests show that the separation and washing effect of the 1.5T slurry machine is not obviously different from the 5.0T superconducting magnetic separation effect, so that the magnetic substances in the potash feldspar ore body can be completely separated under the operation of 1.5T, and the key point is that the slurry preparation is proper.
The process adopts the scheme of once 2.5T vertical ring magnetic separation and twice 1.5T electromagnetic slurry machine magnetic separation, and achieves the best effect. Two devices with the same power are connected in series, 1.5T electromagnetic intermittent strong magnetic separation is continuously carried out twice, and the magnetic separation process is ended.
Ten, dehydration and filtration
Through the washing and selecting processes, the treatment from raw ore to fine sand is completed, the fine sand with impurities is rinsed to the fine sand, and then the metal element substances in the powder are removed through three times of magnetic separation processing.
Eleven, drying and packaging:
conveying the powder in the wet powder cooling field into drying equipment through a belt for drying, cooling and packaging;
and twelfth, storing in a warehouse or shipping.
The key five procedures of the invention are as follows:
1. selecting mineral resources and configuring the mineral resources;
2. only screening and no washing are carried out in the stage from coarse breaking to sanding, so that the loss of fine powder is reduced (the loss in the stage is not returned);
3. if the content of mica is high in the rinsing after sanding, the sand breaking and sanding are only performed once hydraulic grading rinsing, so that light substances such as mica are floated and separated, and enough upwelling water flows float the mica and the light substances out; a secondary grading fallback precipitation mode is adopted, most of fine powder is graded to fall to the ground to return to the back, the powder is kept to be not lost or to be lost to the minimum extent, and the loss of the substance of silicon-aluminum-potassium-sodium-calcium which shows the whiteness index is kept to be small;
4. repeated tests are carried out to accurately configure the water-powder slurry ratio;
5. during magnetic separation, ultrasonic waves before electric separation vibrate and separate weak magnetic objects, and play an important role in improving the electromagnetic separation effect.
The five key processes are well done, other processes are not different from general deep processing, and high-grade, high-purity and ultra-white effects can be produced.
The invention cleans ore by putting the ore in the gravel block with more than 50mm to clean the impurities in the ore, which can clean the soil impurities in the ore and avoid the loss of the substances such as silicon, aluminum, potassium, calcium, barium, strontium and the like in the ore body as much as possible. In order to remove mica in the ore to the maximum extent, a wind power separation method can be adopted in a 3-30 mm block grain time period, the mica can be separated, and a considerable amount of fine powder can be reserved to fall back into the silt.
Through multiple tests, the results of whether the block particles of 50-5 mm are subjected to hydraulic flushing or not are compared, and the whiteness of the material of the product which is not flushed, ground again, washed and selected is higher than that of the product which is washed by 4-10%.
From the whole process, the key points are that the determination of high-potassium grade is guaranteed in the first link of selecting mineral resources and configuring, the strong washing of fine ore is forbidden between coarse breaking and sanding, mica and light impurities are removed by wind power, the water slurry concentration is accurately prepared in the slurry mixing procedure after grinding, and the ultrasonic vibration separation of magnetic substances is carried out between two kinds of magnetic separation. Other procedures are the same as the deep processing of the industry.
In the aspect of environmental protection, the whole system process ensures the whole physical treatment mode in the whole process, each process is processed in a factory, and each link of each equipment has no dust, zero emission and no pollution.
The details of the present invention not described in detail are prior art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A deep processing technology for a high-purity ultra-white potassium feldspar material is characterized by comprising the following steps:
s1: selection and configuration of mineral resources:
selecting mineral resources with main mineral elements of potassium oxide more than 12%, silicon oxide more than or equal to 64%, aluminum oxide more than or equal to 15%, sodium 1-2.5% and calcium less than 2%, wherein the occurrence form of iron substance minerals is in an amorphous grid state; the production of the product is completed by adopting one ore or two kinds of ore;
s2: rough crushing and color sorting processing of a mine source:
a) coarse crushing: the coarse broken gravel degree is controlled to be 30-80 mm, and when the number of mica in the ore is large, the ore can be broken to 10-35 mm for air separation;
b) color selection: ore dressing by combining manual hand dressing and color dressing equipment for removing impurities, and removing over 60 percent of non-potassium feldspar gravel particles in the ore; before the color sorting equipment operates, removing soil and fine mica sheets by using a 3mm roller screen, wherein the color sorting needs to be coarsely broken to the specification of 10-30 mm or 30-50 mm;
s3: sanding and fine breaking in a factory:
conveying the ore to a sand blasting machine through a belt, carrying out magnetic separation through a hanging permanent magnet in the belt conveying process, transferring the ore to fine breaking, sanding and coarse grain breaking of less than 5mm, removing metal objects and carrying out fine breaking;
s4: and (3) hydraulic classification rinsing:
floating, overflowing and separating mica and other light substances from the surface layer of the water surface by utilizing water flow upwelling, removing, recovering all fine mineral powder settled in the water body by adopting a secondary sedimentation mode, and levigating the fine mineral powder and large materials together by the next procedure;
s5: grinding and screening:
conveying the coarse sand to a grinding machine, and carrying out grinding and grain breaking, wherein the grain breaking size is selected between 100-300 meshes according to the requirement;
s6: standard slurry preparation:
controlling the slurry water powder at 75 percent: 25, putting the mixture into a pool, stirring the mixture evenly, and pushing the mixture to magnetic separation equipment through a slurry pump;
s7: vertical ring magnetic separation:
performing the work of separating the first round of magnetic metal objects from the slurry by adopting vertical ring magnetic separation; transferring the slurry with the magnetic substances removed into an intermittent electric slurry separation machine, carrying out electromagnetic separation in a parallel and mass production mode, and separating and removing the magnetic metal substances in a second round;
s8: ultrasonic vibration separation:
pushing the slurry subjected to the secondary magnetic separation to separate magnetic substances into an ultrasonic vibrator, separating most of magnetic substances into slurry liquid through vertical ring magnetic separation and primary electric separation, and vibrating and separating the rest weak magnetic substances and a small amount of fine metal substances attached to the powder into a free state through ultrasonic vibration;
s9: selecting an intermittent electromagnetic slurry machine:
the method of generating strong magnetism to adsorb metal magnetic substances by electrifying and abandoning the magnetic substances into a special container to be transferred by power failure is repeated and circulated, so that the metal substances are separated and reduced; two devices with the same power are connected in series, 2.5T electromagnetic intermittent strong magnetic separation is continuously carried out twice, and the magnetic separation process is ended;
s10: and (3) filtering and dehydrating:
pushing the slurry subjected to the magnetic separation for three times to dehydration filtering equipment for dehydration treatment to enable the powder to be dried from the slurry to the powder, and pushing the slurry to a cold field for water vapor release regulation;
s11: drying and packaging:
conveying the powder in the wet powder cooling field into drying equipment through a belt for drying, cooling and packaging;
s12: and (5) warehousing and storing or shipping.
2. The deep processing technology of high-purity ultra-white potassium feldspar material in claim 1, wherein after the step S2 and before the step S3, the fine ore is screened and not washed from the coarse crushing stage to the sand blasting stage, so as to reduce the loss of fine powder.
3. The deep processing technology for the high-purity ultra-white potassium feldspar material according to claim 1, wherein in the step S2, in the process of belt operation and transfer, a fan is arranged to blow away mica sheets larger than 3mm at the belt operation transfer position, and about 60-70% of the mica sheets can be blown away from the ore.
4. The deep processing technology for the high-purity ultra-white potassium feldspar material according to claim 1, wherein in the step S9, the intermittent electromagnetic slurry machine adopts one high-power vertical ring magnetic separation device to match with four electric slurry separation machines connected in parallel and in series, namely two electric slurry separation machines are connected in parallel and two electric slurry separation machines are connected in series.
5. The deep processing technology for the high-purity ultra-white potassium feldspar material according to claim 1, wherein in the step S7, 2.5T vertical ring strong magnetic separation is adopted for vertical ring magnetic separation, and 1.5T strong magnetic separation is adopted for an electromagnetic slurry machine.
6. The deep processing technology of high-purity ultra-white potassium feldspar material of claim 1, wherein in the step S8, a 500 hz ultrasonic vibrator is selected to separate the weak magnetic substances from the particle surface.
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| CN105921258A (en) * | 2016-04-29 | 2016-09-07 | 洛南县大秦钾矿有限公司 | Method for impurity removal and whitening of potassium feldspar |
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| CN109179433A (en) * | 2018-08-31 | 2019-01-11 | 贺州市骏鑫矿产品有限责任公司 | A kind of purification method of whitening of potassium feldspar |
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