WO2016187863A1

WO2016187863A1 - Mineral concentrating machine

Info

Publication number: WO2016187863A1
Application number: PCT/CN2015/080031
Authority: WO
Inventors: 张宝祥
Original assignee: 张宝祥
Priority date: 2015-05-28
Filing date: 2015-05-28
Publication date: 2016-12-01

Abstract

Disclosed is a mineral concentrating machine (200), comprising: a separation barrel (210), the sorting barrel (210) being an internal hollow roller, a central axis of the roller being transversely arranged, and a sorting chamber (215), through which raw ore pulp can pass, being arranged in the roller; a magnetic field generation device (220), the magnetic field generation device (220) being arranged along the circumference of the separation barrel (210) so as to generate a magnetic field around the sorting chamber (215); a rack (230), configured to support the separation barrel; a driving device (240), configured to drive the separation barrel (210) to rotate around its own central axis; and a blanking mechanism (270), a feeding mechanism (250) and a discharge mechanism (260), wherein the discharge mechanism (260) comprises a first discharge hole (261) configured to convey selected minerals, and a second discharge hole (262) configured to convey remaining materials, the blanking mechanism (270) is arranged at the upper part of an inner cavity of the separation barrel (210) so to enable the selected materials to fall into a first material receiving device (263) connected to the first discharge hole (261), and the feeding mechanism (250) is configured to feed the minerals into the sorting chamber (215) of the separation barrel (210).

Description

Mineral selection machine

Technical field

This invention relates to the sorting and selection of materials and, more particularly, to a mineral sorting apparatus.

Background technique

Mineral resources are an important support for the development of the national economy and one of the essential factors for the survival and development of human society. However, with the depletion of rich mineral resources, the characteristics of ore minerals are becoming more and more conspicuous, making the mineral processing technology particularly important in the development and utilization of mineral resources. Most minerals in mineral resources have low useful components and complex mineral composition. They must be separated by mineral processing to increase the content of useful mineral components to meet the requirements of the next smelting and processing technology.

As a mature industrial technology, mineral processing has a history of nearly one hundred years. However, in the case of the gradual reduction of rich mineral resources, the existing mineral processing techniques and means have serious problems of wasting mineral resources.

Since various types of metal minerals exist in an interrelated form, a high content of minerals is accompanied by one or more other minerals of relatively low content. For example, iron ore may be accompanied by minerals such as sulfur ore, copper ore, and silicon ore. At present, China's mineral processing industry only selects and purifies one mineral with relatively high content. Other minerals with relatively low content are discarded as tailings waste. No people or enterprises have all kinds of metals contained in tailings. The operation of re-purification of minerals has resulted in the loss and waste of a large number of available and valuable metal minerals, and the accumulation of a large number of tailings has also polluted the surrounding environment.

At present, there is no effective means of resource remediation and resource recovery in tailings treatment. China's tailings are mostly stored in tailings dams by natural accumulation method. They not only encroach on a large amount of land, pollute the mining area and the surrounding environment, but also pose a safety hazard, and also cause a large number of valuable metals and The loss of non-metallic resources has become a serious constraint to the development of mines. Therefore, an effective technology is urgently needed to comprehensively utilize and reduce tailings resources, turn waste into treasure, and turn harm into profit, thereby improving the ecological environment, improving resource utilization, and promoting sustainable development of the mining industry.

The existing process and equipment cannot realize the effective re-extraction of various valuable resources in the tailings, resulting in a large amount of useful and valuable metal materials being discharged into the tailings along with the non-metal materials, resulting in high energy consumption. The useful metal recovery rate is low, and the recycled grade is low, resulting in a large amount of metal waste and secondary pollution to the surrounding environment.

Summary of the invention

In order to solve the above problems, there is an urgent need for a beneficiation apparatus capable of improving beneficiation efficiency and properly treating tailings. The inventor proposed a mineral selection machine through years of scientific experiments and research.

According to an aspect of the invention, there is provided a mineral sorting machine comprising: a sorting cylinder, the sorting cylinder being an inner hollow drum, the central axis of the drum being laterally arranged and having an internal supply a sorting chamber through which the slurry passes; a magnetic field generating device disposed around the circumference of the sorting cylinder to generate a magnetic field surrounding the sorting chamber; a frame for supporting the sorting cylinder; driving Means for driving the sorting cylinder to rotate about its own central axis; and a blanking mechanism, a feeding mechanism and a discharging mechanism, wherein the discharging mechanism includes a first discharging port for conveying the selected mineral And a second discharge port for conveying the remaining material, the blanking mechanism is disposed at an upper portion of the inner cavity of the sorting cylinder, so that the selected material falls into the first receiving device connected to the first discharge port, and the feeding device The mechanism is used to supply the slurry formed by the water and the mineral material into the sorting chamber of the sorting cylinder.

Preferably, the magnetic generating means may be constituted by a plurality of pairs of magnetic plates which are arranged around the entire circumference of the sorting cylinder. The center axis of the sorting cylinder is arranged substantially horizontally.

Preferably, the sorting cylinder can be made of stainless steel or a wear resistant plastic material.

In one embodiment, the diameter of the sorting cylinder may range from 0.5 meters to 10 meters, and the length of the sorting cylinder may range from 3 to 15 meters.

In one embodiment, in the finishing machine, the mineral feeding end of the feeding mechanism is disposed on the left side of the sorting cylinder, and the discharging mechanism is disposed at the other end of the sorting cylinder.

Preferably, the water supply pipe of the finishing machine is made of a metal material disposed at a predetermined distance in the sorting chamber near the wall of the sorting cylinder, preferably, the water supply pipe is substantially parallel to the central axis of the sorting cylinder.

Alternatively, a sorting device is provided in the sorting chamber of the finishing machine to realize the sorting of minerals, and the sorting device is a thin rod disposed in the sorting chamber of the sorting cylinder, and the thin rod is divided into The central axis of the cylinder is extended in a parallel direction, and a gap is formed between the separator and the inner wall of the sorting cylinder for the passage of the slurry.

Preferably, the length of the sorter is greater than the length spanned by the magnetic field generating means in the direction of the axis of the sorting cylinder.

Preferably, the distance of the sorter from the bottom of the sorting cylinder and the vertical distance from the inner wall of the sorting cylinder can be adjusted.

With the method according to the invention, it is possible to efficiently select mineral materials of economic value from a large number of discarded ores or tailings.

The invention has low energy consumption, high metal recovery rate, high metal recycling grade, and simultaneous separation and discharge of logistics and water, thereby fundamentally solving the problem of environmental pollution.

DRAWINGS

In order to more clearly illustrate the technical solutions of the present disclosure, specific embodiments of the present application are described below with reference to the accompanying drawings.

Figure 1 shows a schematic view of a mineral sorting machine in accordance with one embodiment of the present invention;

Figure 2 shows a schematic end view of a picker according to the embodiment of Figure 1;

Figure 3 shows a schematic view of a finishing machine in accordance with one embodiment of the present invention.

detailed description

The invention will now be further described with reference to the accompanying drawings. The embodiments described in this disclosure are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. The scope of the invention is not limited by the specific embodiments described below.

In the following disclosure, it is to be understood that the illustrated embodiments and examples are illustrative only. Unless specifically stated herein, various terms and phrases associated with the elements, components, devices, and processes referred to in this disclosure are consistent with the definitions and meanings that are generally understood by those of ordinary skill in the art. It should be noted that the shapes and positions of the various devices, devices, conduits, components, components, and the like shown in the figures are merely schematic, and it should be understood that the various elements shown in the figures are The situation can be taken in a variety of forms and forms without departing from the spirit and scope of the invention.

The invention discloses a mineral sorting machine, which has the characteristics of high efficiency, energy saving and environmental protection.

It can be understood that the mineral dressing machine involved in the present disclosure can be used not only for beneficiation such as magnetite ore, hematite, but also for beneficiation of manganese ore, non-ferrous metals and rare metals. Ore that may utilize the apparatus of the present disclosure includes, but is not limited to, magnetite, hematite, vein tungsten, sand tin, beach sand, pyrrhotite, ilmenite, wolframite, strontium iron Mines, coltan, monazite and brown earth mines, etc.

Further, according to the experimental results of the inventors, the apparatus of the present invention is not only applicable to the above-described magnetic minerals. The apparatus according to the present invention is also useful for screening other magnetic materials, and can also be used to screen materials capable of inducing magnetism, and can also screen other materials as long as they can produce motion changes in the apparatus of the present invention and can be attached to the sorting. The blank wall reaches the blanking area.

In one embodiment in accordance with the present invention, as shown in the schematic views of Figures 1 and 2, a mineral sorting machine 200 is provided that includes a sorting cylinder 210 that is internal a hollow drum having a central axis of the drum disposed laterally and having a sorting chamber 215 for the passage of raw ore slurry therein; a magnetic field generating device 220 disposed around the circumference of the sorting cylinder 210 to create a surrounding Selecting a magnetic field of the chamber; a frame 230 for supporting the sorting cylinder; a driving device 240 for driving the sorting cylinder 210 to rotate about its central axis; and a blanking mechanism 270 and a feeding mechanism 250 And a discharge mechanism 260, wherein the discharge mechanism includes a first discharge port 261 for conveying the selected mineral, and a second discharge port 262 for conveying the remaining material, the blanking mechanism 270 is disposed in the branch The upper portion of the inner cavity of the cylinder is selected such that the selected material falls into the first receiving device 263 connected to the first discharge port 261, and the feeding mechanism is used for supplying the slurry formed by the water and the mineral material into the sorting cylinder 210. Do not chamber 215.

In the mineral dressing machine shown in Figs. 1 and 2, the magnetic generating device 220 is composed of a plurality of pairs of permanent magnet magnetic plates. It can be understood that an electromagnet can also be used instead of a permanent magnet.

In the present embodiment, the center axis of the sorting cylinder is substantially horizontally arranged.

In other embodiments, the central axis of the sorting cylinder can also be appropriately tilted as appropriate. For example, if a faster discharge rate is required or for ease of discharge, the center axis of the sorting cylinder can be arranged such that the discharge end is slightly lower than the feed end. In some cases, such as for minerals that are too fast or minerals that are more fluid, it is also possible to arrange the sorting cylinders such that the discharge end is slightly above the feed end.

Figure 2 shows an end elevational view of the mineral sorter 200 shown in Figure 1, in which the construction of the interior of the sorting cylinder is more clearly shown, such as brackets, drives, feed mechanisms and Parts such as the discharge mechanism.

As shown more clearly in FIG. 2, the magnetic field generating device 220 is disposed around the sorting chamber 215 of the sorting cylinder 210 in the circumferential direction. Preferably, the magnetic field generating device 220 includes a plurality of pairs of magnetic plates arranged around the circumference of the sorting cylinder 210. Preferably, the magnetic field generating means 220 is arranged over the entire circumference of the sorting cylinder, and may also be arranged on a partial circumference. The frame 230 includes a plurality of sets of rollers for supporting the sorting cylinder to enable the sorting cylinder to rotate. The blanking mechanism 270 is disposed at an upper portion of the sorting chamber 215, and during the operation, the selected material falls into the first receiving device 263 connected to the first discharge port 261.

During the operation of the mineral dressing machine, the slurry formed by mixing the selected mineral material with water is supplied into the sorting cylinder 210, and the driving device 240 drives the sorting cylinder 210 to rotate under the magnetic field generated by the magnetic field generating device 220. The mineral material in the sorting chamber of the sorting cylinder 210 moves upward from the bottom of the chamber while following the rotation of the cylinder wall, and then falls due to the action of gravity, and the mineral material is repeatedly stirred inside the sorting cylinder 210, so that The first mineral entrained therein is separated during the agitation and attached to the inside of the barrel wall. The first mineral attached to the wall of the cylinder moves upwards as the sorting cylinder rotates, reaching the blanking zone above the inner chamber of the sorting cylinder. The selected mineral (first mineral) is dropped to the first pick-up device 263 by the blanking mechanism 270 in the blanking zone, and then the first mineral exits the sorting cylinder 210 via the first outlet 261. The tailings located at the bottom of the sorting chamber fall into the second receiving tank through the second discharge port of the sorting cylinder, leaving the sorting cylinder.

The workflow of the device according to the present invention will be specifically described below by taking the selection of magnetite as an example. Cheng. The magnetite ore is mainly deposited metamorphic magnetite ore. Most of the iron minerals in the ore are magnetite, mainly composed of fine-grained inlays, and the gangue minerals are mainly silicate minerals such as quartz or amphibole. In some cases, there are more iron silicates.

At the time of beneficiation, the ore may be preliminarily selected using the apparatus according to the present disclosure. During the primary selection process:

First, the granular or powdery raw mineral to be screened is supplied to the sorting chamber 215 of the sorting cylinder 210 by the feeding mechanism 250, while the raw ore is moved from the inlet to the outlet inside the sorting cylinder. Water is supplied through the water supply pipe 251 of the supply device 250. The first material in the raw ore material is attached to the inner wall of the sorting cylinder by the magnetic field distributed along the circumference of the sorting chamber 215.

The sorting cylinder 210 is driven to rotate so that the mineral material moves upward from the bottom along the inner wall of the sorting cylinder while advancing and then falls due to the action of gravity. The sorting cylinder continues to rotate, so that the mineral material repeats the above ascending and falling process in the sorting chamber, so that the first mineral in the mixed mineral material is separated during the stirring and tumbling process, and the magnetic field acts during the stirring process. The lower ones combine to form a first mineral cluster or a mineral chain. Preferably, the magnetic field lines of the magnetic field are substantially perpendicular to the direction of advancement of the mineral material.

Under the action of the magnetic field, the first mineral material is attached to the inner wall of the sorting and moves upward with the rotation of the sorting cylinder to reach the blanking area above the sorting chamber 215.

The first mineral falls to the first pick-up device 263 through the blanking mechanism 270 in the blanking zone, and the selected first mineral is conveyed out of the sorting cylinder via the outlet of the first pick-up device 263.

The ingredients other than the first mineral in the raw ore material enter the second take-up device via the second discharge port in the lower portion of the sorting chamber, and then exit the mineral picker.

Preferably, after the first mineral material is screened by the mineral dressing machine, the above-mentioned material selection process may be repeated in another mineral sorting machine after grinding to perform fine sorting.

In the above beneficiation process, both the raw ore and the selected minerals are flowed and transported in the form of pulp. Pipes or conveyor belts can be used to transport a variety of materials.

In the present embodiment, the sorting cylinder 210 is laterally disposed and may be made of stainless steel or other wear resistant plastic material. The sorting cylinder can also be made of other wear-resistant materials that do not obstruct the magnetic lines of force. production.

The sorting cylinders can be manufactured in different sizes depending on the amount of processing. For example, the diameter of the sorting cylinder can range from 0.5 meters to 10 meters. The length of the sorting cylinder can be in the range of 3 to 15 meters. It can be understood that, depending on the type of material to be selected and the rotational speed, the size of the sorting cylinder can be determined according to the specific situation, as long as the mineral material in the sorting chamber of the sorting cylinder is subjected to a sufficiently large magnetic field. It can be adsorbed onto the inner wall of the sorting cylinder.

As shown in FIG. 1, the feed supply end of the supply mechanism 250 is disposed on the left side of the sorting cylinder 210, and the discharge mechanism 260 is disposed at the other end of the sorting cylinder 210. The water supply pipe 251 extends from the right end to the left end, that is, the water supply pipe 251 extends from the discharge end of the sorting cylinder to the feed end, and preferably, the water outlet of the water supply pipe is at the feed end. In other embodiments, the portion of the water supply tube within the sorting chamber can have a plurality of openings spaced apart by a distance.

In the mineral sorting machine shown in Fig. 1, the water supply pipe 251 is made of a metal material and disposed at a predetermined distance in the sorting chamber near the wall of the sorting cylinder, and the water supply pipe can also utilize the water supply pipe at the same time. The influence of the magnetic field in the changing magnetic field assists in the precise sorting of the slurry. The water supply pipe 251 is substantially parallel to the central axis of the sorting cylinder 210. During the rotation of the sorting cylinder, the slurry which is tumbling and stirring in the sorting chamber and the selected mineral material pass through the inner wall and the branch of the sorting cylinder. A gap between the selectors; preferably, one or more water supply tubes 251 are disposed near the barrel wall at a lower portion of the inner chamber of the sorting cylinder. The water supply pipe does not rotate with the sorting cylinder and can be fixed to the bracket outside the sorting cylinder. Preferably, for different minerals to be selected, the position of the water supply pipe in the sorting chamber can be adjusted according to the nature of the mineral to be selected.

The water supply pipe 251 may be plural, preferably 2-5, and further preferably 2.

The distance of the water supply pipe from the bottom of the sorting cylinder and the vertical distance from the inner wall of the sorting cylinder can be adjusted. For different mineral and grade requirements, the vertical distance of the water supply pipe from the bottom of the sorting chamber and the inner wall of the sorting cylinder can also be adjusted accordingly.

Through the magnetic field provided on the circumference of the sorting cylinder and the water supply pipe, the selected mineral (the first mineral, in this embodiment, iron ore) in the slurry is subjected to a magnetic field during the ascending and falling process, and is repeatedly Stir and combine with each other during agitation to form a magnetic group and/or a magnetic chain. After being pooled into a large enough magnetic group and/or flux linkage, it is attached to the inner wall of the sorting cylinder and continues upward with the rotation of the sorting cylinder. Move to the blanking area above the sorting chamber.

In other embodiments in accordance with the present disclosure, a separate sorter can be provided to achieve the selection of minerals. In the case where the sorter is separately provided, the water supply pipe can be set to other suitable forms and set at other positions as needed. For example, the water supply pipe can be placed on the same side as the slurry inlet, as shown on the left side in FIG. In the case where a separate sorter is provided, the water supply pipe may be made of a non-magnetic material such as plastic or a flexible material.

In one embodiment, as shown in FIG. 3, the sorter is a thin rod disposed in a sorting chamber of the sorting cylinder, the thin rod extending in a direction parallel to the central axis of the sorting cylinder. The sorter may be, for example, a metal rod disposed to extend in the direction of the axis of the sorting cylinder, and a gap through which the slurry passes is formed between the metal rod and the inner wall of the sorting cylinder.

The slurry can be accurately selected by the sorter; the sorter is substantially parallel to the central axis of the sorting cylinder, and during the rotation of the sorting cylinder, the slurry which is tumbling and stirring in the sorting chamber and the selected mineral material are selected. Pass through the gap between the inner wall of the sorting cylinder and the sorter.

The length of the sorter is substantially the same as the length of the sorting cylinder, preferably the length of the sorter is greater than the length spanned by the magnetic field generating means in the axial direction of the sorting cylinder.

Preferably, one or more sorters may be provided adjacent the wall of the sorting cylinder at a lower portion of the sorting chamber.

Preferably, the number of metal bars of the sorter is from 2 to 5, more preferably two.

The distance of the metal rod of the sorter from the bottom of the sorting cylinder and the vertical distance from the inner wall of the sorting cylinder can be adjusted. For different mineral and grade requirements, the vertical distance between the bottom of the sorting chamber and the inner wall of the sorting cylinder is also different.

Preferably, the metal rod is a metal tube having one end connected to the water inlet and the other end being provided with a water outlet.

The following smart selection steps in the present embodiment will be specifically described with reference to the drawings.

After the primary mineral material is ground, it is supplied to the finishing machine 300, or after the grinding and fineness sorting, the mineral material is supplied to the finishing machine.

The slurry 10 formed by mixing the mineral material and the water moves from the inlet to the outlet inside the finishing cylinder of the finishing machine, wherein the central axis of the finishing cylinder is substantially horizontally arranged;

While the slurry flows, the selective selection cylinder 310 is rotated about its own central axis, so that the slurry moves upward from the bottom of the drum along the inner wall of the finishing cylinder while advancing and then due to the weight Falling by the force, continuously rotating the cylinder, so that the slurry repeats the above ascending and falling process in the selected cylinder, and continuously stirs and rolls in the inner cavity of the selected cylinder;

A magnetic field is applied to the slurry by a magnetic field generating device disposed along the circumference of the finishing cylinder such that the selected mineral particles in the slurry are attached to the inner wall of the finishing cylinder, wherein the magnetic field lines of the magnetic field are substantially opposite to the direction in which the slurry advances. vertical;

The slurry is precisely sorted by a sorter 330 disposed at a predetermined distance from the selected barrel lumen adjacent the wall of the selected barrel; the sorter 330 is substantially parallel to the central axis of the selected barrel 310, in the selective barrel During the rotation, the slurry which is tumbling and stirring in the inner cylinder of the selected cylinder and the selected mineral material pass through the gap between the inner wall of the finishing cylinder and the sorter; preferably, in the lower part of the inner chamber of the selected cylinder One or more sorters 330 are disposed adjacent the wall of the barrel.

By the magnetic field provided on the circumference of the sorting cylinder and the sorter, the selected mineral (the first mineral, in this embodiment, the iron ore) in the slurry can be subjected to a magnetic field during the ascending and falling process. They are repeatedly stirred and combined with each other during the agitation process to form magnetic groups and/or magnetic chains. After being pooled into a large enough magnetic group and/or flux linkage, they are attached to the inner wall of the sorting cylinder and continue upward with the rotation of the cylinder. Move to the blanking area above the sorting chamber.

The first mineral is dropped to the first receiving device by the blanking mechanism in the blanking zone, and exits the sorting cylinder via the first discharge opening of the receiving tank.

The material other than the selected mineral in the slurry enters the second receiving device at the bottom of the sorting chamber and exits the mineral dressing machine via the second discharge port.

Preferably, the sorter is made of a magnetically permeable material such as magnetic metal or carbon fiber. For example, the sorter may be a metal rod made of iron or the like. Preferably, the sorter can be a hollow metal tube which can also be used for water supply at the same time.

Preferably, the magnetic plate may be curved to fit snugly against the inner or outer edge of the sorting cylinder.

In one embodiment, the magnetic plate may be embedded in the wall of the sorting cylinder.

In one embodiment, the magnetic plate in the magnetic field generating device has a curved surface that matches the outer wall of the sorting cylinder, is disposed on the outer wall of the sorting cylinder and fits snugly on the sorting cylinder. With such an arrangement, the magnetic field generated by the magnetic plate in the sorting chamber can be made stronger, so that a better sorting effect can be produced.

The driving device 240 is used to drive the sorting cylinder to rotate. In one embodiment, the drive device The motor includes a motor, a transmission gear, and a rack disposed on an outer circumference of the sorting cylinder. It is to be understood, however, that the drive means can be any other suitable means or mechanism capable of driving the rotation of the sorting cylinder.

In the mineral sorting machine according to the present invention, the rotation speed of the sorting cylinder may be 5-20 rpm, preferably 8 to 15 rpm.

A blanking mechanism 270 is disposed in the upper portion of the sorting chamber and can extend from the outside of the sorting cylinder into the sorting chamber through a support suspension (not shown). In one embodiment, the blanking mechanism 270 includes a scraper 271 that abuts the inner wall of the sorting cylinder 210. The squeegee 271 abuts against the inner wall of the sorting cylinder so that the selected mineral material attached to the inner wall of the sorting cylinder can be separated from the wall of the cylinder and dropped into the first splicing device 263 by gravity.

Preferably, the length of the sorter is substantially the same as the length of the magnetic field of the cartridge.

Preferably, the magnetic field acting area in the sorting cylinder is greater than 6 square meters.

Preferably, in the mineral sorter according to the present invention, the circumferential magnetic field strength of the sorting cylinder may be between about 3000 gs (Gauss) and 6000 gs when the primary selection is performed. When fine beneficiation is performed, the magnetic field strength in the sorting cylinder can be between 0 and 2000 gs.

Of course, the strength of the magnetic field in the mineral selection machine can be selected according to the actual situation. In the case of using an electromagnetic device to generate a magnetic field, the magnetic field strength of the mineral selection machine for mineral primary selection can be as high as 20,000 gs.

In the mineral sorting machine according to the present invention, when the mineral material is rotated in the sorting chamber, the magnetic field strength to which the mineral material is subjected may vary unevenly from 0 to 5000 GS, and depending on the arrangement of the magnetic plates, The magnetic lines of force around the periphery of the barrel vary in both the lateral and longitudinal directions.

[Beneficial effect]

By using the mineral sorting machine according to the invention, at least the following beneficial effects can be achieved:

In the actual test of the applicant, "non-magnetic iron" in the raw material can be selected.

It can make the deposition metamorphic ultra-poor iron ore Tfe (all iron) at 5.6%; mfe (magnetic iron) at 86% to select up to 66% of iron fine powder; tailings sand has only 1.1% Tfe grade; and the ore ratio is less than 20:1.

You can choose the "world problem" ultra-lean vanadium-titanium magnetite tailings. The ultra-lean vanadium-magnesium magnetite tailings re-selected iron fine powder to reach more than 65% Tfe, and the ore ratio is less than 25:1.

Can choose the metal iron in the sulfuric acid slag; can be as high as Tfe 85%, far higher than the current The highest data of the most advanced mineral processing technology in the country is 63.3%.

The iron concentrate can be further purified, and about 65% of the iron fine powder can reach 71.5% by using the mineral dressing machine according to the present invention. Almost close to the theoretical value of ferroferric oxide 72.4%.

Some examples will be exemplified below to illustrate the beneficial effects and great economic benefits of the mineral sorter according to the present invention.

Example 1

The tailings sand of the ultra-lean vanadium magnetite from the ultrabasic rock mass from a certain area of Hebei Province was subjected to tailings screening using the apparatus according to the present invention.

According to the test report of the inspection department: the mineral content of the above-mentioned mine tailings is as follows (total 100%): pyroxene minerals accounted for 47.59% in the tailings sand, amphibole minerals accounted for 18.53%, feldspar minerals accounted for 14.51%, ilmenite minerals It accounts for 5.87%, montmorillonite minerals account for 5.19%, chlorite minerals account for 1.75%, and illite minerals account for 6.55%. It can be seen that the tailings sand does not contain a single mineral of magnetite.

In the prior art tailings treatment process, there is almost no way to select iron fine powder that meets the industrial specifications from the above-mentioned ultra-lean vanadium magnetite tailings. Because of the common mineralogy, crystallization chemistry theory and the mineral processing experience in the prior art, although pyroxene and amphibole contain iron, they are "lattice iron", which is iron in silicate, which is fundamentally used in physical beneficiation. impossible. Ilmenite does contain iron, but iron Fe in feTiO3 accounts for only 36.8%, titanium Ti accounts for 36.6%, and the rest is 26.6% oxygen. Only 5.87% of the ilmenite in the tailings sand is theoretically almost impossible to select the iron powder that meets the industrial requirements.

However, by using the mineral sorting machine according to the present invention, the inspection report of the authority indicates that the iron obtained after the above tailings is selected in the first beneficiation test using the above-described mineral sorting machine of the present invention The fine powder Tfe reached 57.55%.

In the second test, the iron fine powder Tfe was selected to be 65.78%.

Example 2

A 32-ton sample was taken from the tailings of a mine to conduct a beneficiation test.

With the mineral dressing machine according to the invention, the beneficiation test results of the tailings sand of the same type of deposit industry are:

The Tfe content was 8.52%; the refined powder grade was 65.67%; the tailings Tfe grade was 3.61%; the ore dressing metal recovery rate was 60.98%, and the yield was 7.9%.

In contrast: with the same tailings sand, the best indicators obtained in the prior art beneficiation process are:

The Tfe grade of tailings sand is 7.91%; the grade of refined powder is also 65.76%, but the recovery rate of ore dressing metal is 21.23%, and the yield is 2.46%.

It can be seen that the recovery rate of the ore dressing metal obtained by the mineral sorting machine according to the present invention is 39.75% higher than the best index of 21.23%, and the yield is 5.44% higher than the current best indicator of the country at 2.46%. This means that the Tfe content in the same tailings tailings is basically the same, and the selected iron fines are 65.67%. However, the mineral-selecting machine of the present invention can produce more iron than the 100 tons of tailings. The refined powder is 5.44 tons, and the sales revenue is more than 5,000 yuan, which is 39.75% more than the existing technology.

It can be seen that the mineral dressing machine according to the invention has very good technical effects.

The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or within the technical scope of the present disclosure. Alternatives are intended to be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

A mineral selection machine, the selection machine comprising:

a sorting cylinder, the sorting cylinder is an inner hollow drum, the central axis of the drum is arranged laterally and has a sorting chamber for the passage of raw ore slurry inside;

a magnetic field generating device disposed around a circumference of the sorting cylinder to generate a magnetic field surrounding the sorting chamber;

a frame for supporting the sorting cylinder;

a driving device for driving the sorting cylinder to rotate about its own central axis;

Blanking mechanism, feeding mechanism and discharging mechanism,

Wherein the discharging mechanism comprises a first discharging port for conveying the selected minerals, and a second discharging port for conveying the remaining materials, the blanking mechanism is arranged on the upper part of the inner cavity of the sorting cylinder, so that the selected one is selected The material falls into a first receiving device connected to the first discharge port, and the feeding mechanism is used to supply the slurry formed by the water and the mineral material into the sorting chamber of the sorting cylinder.
The dressing machine according to claim 1, wherein said magnetic generating means is constituted by a plurality of pairs of magnetic plates which are arranged around the entire circumference of the sorting cylinder.
The dressing machine according to claim 2, wherein the center axis of the sorting cylinder is substantially horizontally arranged.
A dressing machine according to any one of claims 1 to 3, characterized in that the sorting cylinder is made of stainless steel or a wear-resistant plastic material.
The dressing machine according to claim 4, wherein said sorting cylinder has a diameter in the range of 0.5 to 10 meters, and said sorting cylinder has a length in the range of 3 to 15 meters.
The dressing machine according to claim 5, wherein the supply feeding end of the feeding mechanism is disposed on the left side of the sorting cylinder, and the discharging mechanism is disposed at the other end of the sorting cylinder.
The finishing machine according to claim 5 or 6, wherein the water supply pipe is made of a metal material and is disposed in the sorting chamber at a predetermined distance from the wall of the sorting cylinder, preferably, the water supply pipe It is substantially parallel to the central axis of the sorting cylinder.
A finishing machine according to claim 5 or 6, wherein said sorting chamber A sorter is provided to realize the sorting of minerals, the sorter being a thin rod disposed in the sorting chamber of the sorting cylinder, the thin rod extending in a direction parallel to the central axis of the sorting cylinder A gap is formed between the sorter and the inner wall of the sorting cylinder for the passage of the slurry.
The dressing machine according to claim 5 or 6, wherein the length of the sorter is larger than the length spanned by the magnetic field generating means in the axial direction of the sorting cylinder.
The dressing machine according to claim 5 or 6, wherein the distance of the sorter from the bottom of the sorting cylinder and the vertical distance from the inner wall of the sorting cylinder can be adjusted.