WO2020197009A1 - Tungsten concentrate extraction system using continuous process method - Google Patents

Abstract

The present invention relates to a system for extracting tungsten concentrate on the basis of a continuous process method, the system comprising: a storage means which is equipped with a storage bin (10) and a cushion bin (15) for storage of mineral raw materials; a crushing means (20) for crushing the mineral raw materials fed from the storage bin (10) with a crusher (22); a grinding means (30) for grinding the mineral raw materials fed from the crushing means (20) with a ball mill grinder (32); a classification means (40) for classifying the mineral raw materials fed from the grinding means (30) to an input pipe (41) and feeding same to a classification pipe (42) or a return pipe (43); a beneficiation means (50) for beneficiating tungsten concentrate from the mineral raw materials fed to the classification pipe (42) of the classification means (40); and a control means (60) for controlling the storage means, the crushing means (20), the grinding means (30), the classification means (40), and the beneficiation means (50) with a set algorithm. Accordingly, by continuously monitoring and controlling the system on the basis of modularity of a process of crushing, grinding, or beneficiating mineral raw materials, the present invention has an effect of increasing the recovery rate and quality of tungsten materials in an economical manner.

Description

Continuous process method of tungsten concentrate extraction system

The present invention relates to a tungsten concentrate extraction system, and more specifically, to a tungsten concentrate extraction system of a continuous process method for generating rare resources through a series of processes of crushing, crushing, and classifying raw minerals.

Tungsten material is an important component that exhibits ultra-high strength, high toughness, and heat resistance in the fields of automobiles, semiconductors, aerospace, defense, electricity/electronics, and cutting tools, and its usage is increasing year by year. On the other hand, tungsten is a very scarce resource among the materials that make up the crust, and has a high dependence on China, resulting in rapid supply-demand imbalance and price volatility. In order to produce tungsten materials, intermediates that have been mined, sorted, and highly concentrated in mines are required.

As prior art documents that can be referenced in connection with this, the following Korean Patent Publication No. 1436001 (Prior Document 1), Korean Patent Application Publication No. 1774846 (Prior Document 2), and the like are known.

Prior Literature 1 is called "photorefinement system" and the publication date is 2014.10.22. Prior Document 2 is named "Method of recovering tungsten from low-grade tungsten ore", and the publication date is 2017.09.05.

Prior Document 1 is a classifier for sorting crushed gemstones; An oxygen mixing vessel in which minerals contained in the raw stone powder are adsorbed on activated carbon; An activated carbon sorter for separating activated carbon; A smelting tank for smelting the remaining material after the activated carbon is burned; A water collecting system for sedimenting raw stone powder; A concentration tank for receiving and storing the precipitated raw stone powder; And the like. Accordingly, it is expected to increase productivity by performing the entire process as one system.

Prior Document 2 is a step of preparing a mixture by adding soda ash to a tungsten ore and grinding it; Adding the mixture to boiling water and reacting to leach water; Solid-liquid separation, recovering the liquid, and transferring to a water leaching step; And recovering the liquid when 95% or more of the tungsten ore is leached into a liquid phase. And the like. Accordingly, the effect of recovering from ultra-low-grade tungsten ore as a liquid is expected.

However, according to the activated carbon method of Prior Document 1 or the high-temperature water leaching method of Prior Document 2, the process flexibility corresponding to the conditions of the raw material ore was insufficient, and thus the facility had to be stopped occasionally, showing room for improvement.

It is an object of the present invention to improve the conventional problems as described above, in the extraction of a trace amount of rare metal tungsten material (WO3) mixed in the raw material mineral scheelite, modularization of the process of crushing, grinding and beneficiation of the raw mineral It is to provide a continuous process method of tungsten concentrate extraction system for continuously monitoring and controlling based on.

Another object of the present invention is to apply to the processing of metals, nonmetallic minerals, grains, as well as all types of materials.

In order to achieve the above object, the present invention provides a system for extracting tungsten concentrate based on a continuous process method, comprising: a storage means having a storage bin and a cushion bin for storing raw minerals; Crushing means for crushing the raw material transported from the storage bin with a crusher; Pulverizing means for pulverizing the raw material transported from the crushing means with a ball mill grinder; Classification means for classifying the raw minerals transferred from the pulverizing means to the input tube and transferring them to a classification tube or a transfer tube; Beneficiation means for beneficiation of tungsten concentrate from the raw material transferred to the classification pipe of the classification means; And a control means for controlling the storage means, crushing means, pulverizing means, classifying means, and beneficiation means with a set algorithm.

According to the detailed configuration of the present invention, the pulverizing means includes a feed water regulator connected to the upstream side of the ball mill pulverizer, a transfer unit connected to the downstream side of the ball mill pulverizer, a load detector and a speed detector for detecting the operating state of the ball mill pulverizer. It features.

According to a detailed configuration of the present invention, the classifying means includes a cyclone classifier for classifying a slurry of raw minerals to a set particle size, and a particle size controller for adjusting the particle size of raw minerals transferred to the classification pipe.

According to a detailed configuration of the present invention, the beneficiation means includes a sample inspector for inspecting the physical properties of the raw mineral at the downstream side of the classifying means, a flotation detector for beneficiation of tungsten concentrate from the downstream side of the sample inspector, and the concentration and concentration at the upstream side of the flotation detector. It characterized in that it comprises a process detector for detecting the flow rate.

According to the detailed configuration of the present invention, the control means is based on a controller equipped with a microcomputer circuit and a display, and controls the crushing means, the crushing means and the classifying means at a variable speed in response to the input amount of the raw mineral by the storage means. It is characterized.

As described above, according to the present invention, there is an effect of improving quality as well as the recovery rate of tungsten material in an economical manner by continuously monitoring and controlling the process of crushing, crushing, and beneficiation of raw material minerals.

In addition, according to the physical properties of all materials including minerals (Mohs hardness, compressive strength, abrasion, work index, etc.), it is possible to freely adjust the pulverization performance such as pulverization particle size and production capacity and maximize performance.

1 is a piping block diagram showing the overall system according to the present invention

Figure 2 is a block diagram showing an enlarged crushing means according to the present invention

3 is a block diagram showing an enlarged classifying means according to the present invention

Figure 4 is a block diagram showing an enlarged view of the beneficiation means according to the present invention

5 is a block diagram showing the circuit connection of the control means according to the present invention

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention proposes a system for extracting tungsten concentrate based on a continuous process method. A system that extracts trace amounts (about 0.5 wt%) of rare tungsten (WO3) contained in the raw material mineral Schellite (CaWO ₄ ), but is not limited thereto.

The storage means according to the present invention has a structure equipped with a storage bin 10 and a cushion bin 15 for storing raw minerals. In FIG. 1, the contents stored in the storage bin 10 on the upstream side and the cushion bin 15 on the downstream side have differences in physical properties such as particle size, but all are referred to as raw minerals. The storage bin 10 has a stationary structure, while the cushion bin 15 is installed in a movable structure. The movable structure can induce vibration and agitation of raw minerals by the application of external force. The cushion bin 15 is provided with a rotary feeder 16 to facilitate adjusting the amount of conveyance. The rotary feeder 16 is configured to be operated at VSD (variable speed).

At this time, the storage bin 10 and the cushion bin 15 of the storage means are preferably equipped with a weight detector (18). These signals are input to the controller 62 and displayed via a remote/locally installed display 64.

On the other hand, in the wet process system of the present invention, a water supply unit 12 including a storage tank and a pump is essentially provided. A plurality of water supply pipes 13 are connected to the water supply unit 12 to supply raw water through a plurality of processes to be described later. The raw water for the process can control the amount of water supply through the water supply regulator 14 equipped with a plurality of valves.

In addition, according to the present invention, the crushing means 20 has a structure in which the raw mineral transferred from the storage bin 10 is crushed with a crusher 22. The crushing means 20 crushes raw minerals transferred to the conveyor 21 through the storage bin 10 and the hopper with a plurality of crushers 22. The crusher 22 is illustrated as a jaw crusher and a roll crusher, but is not limited thereto. A screen sorter 23 is installed on the downstream side of the crusher 22 to transfer raw minerals of about 5 mm or less to the cushion bin 15. It is preferable to install the crusher 22 and the screen separator 23 in a modular structure in preparation for capacity fluctuations.

On the other hand, the crusher 22 of the crushing means 20 is equipped with a load detector 25 and a speed detector 26. The load detector 25 detects the motor current of the crusher 22 to generate a signal, and the speed detector 26 detects the number of rotations of the motor to generate a signal. These signals are input to the controller 62 and displayed via the remote/local display 64.

In addition, according to the present invention, the pulverizing means 30 has a structure in which the raw mineral transferred from the crushing means 20 is pulverized with a ball mill grinder 32. The pulverizing means 30 pulverizes the raw minerals of about 5 mm or less, which are fed to the ball mill pulverizer 32 on the conveyor 31, into fine particles of 75 μm or less having a size of about 1/66 or less. The ball mill pulverizer 32 is configured in a cylindrical shape and rotates horizontally, and a media for pulverizing raw materials is charged therein. The medium may use a ball and a rod in addition to it. In the horizontally rotating ball mill grinder 32, the raw material minerals and the medium are pulverized vertically while revolving, rotating, and falling together along the wall surface by rotational centrifugal force. In the case of the tungsten concentrate extraction system, it is recommended to fill about 30 to 50% of the internal volume of the ball mill 32 as a medium. The ball mill grinder 32 is configured to be operable at VSD (variable speed).

According to the detailed configuration of the present invention, the pulverizing means 30 includes a water supply regulator 14 connected to the upstream side of the ball mill pulverizer 32, a transfer unit 33 connected to the downstream side of the ball mill pulverizer 32, and a ball mill. It characterized in that it comprises a load detector (35) and a speed detector (36) for detecting the operating state of the crusher (32).

1 and 2, the water supply regulator 14 and the transfer unit 33 of the crushing means 30 are exposed. The water supply regulator 14 is connected from the water supply pipe 13 to the input terminal of the ball mill grinder 32. The transfer unit 33 is illustrated as a pump in a wet process, but a blower or a fan may be applied in the dry process. The ball mill grinder 32 and the transfer unit 33 are preferably installed in a modular structure in preparation for capacity fluctuations. The ball mill grinder 32 and the transfer unit 33 are also configured to be operable by VSD (variable speed). The load detector 35 generates a signal by detecting the motor current of the ball mill grinder 32 and the transfer unit 33, and the speed detector 36 detects the number of rotations of each motor to generate a signal. These signals are input to the controller 62 and displayed via a remote/local display 64.

In addition, according to the present invention, the classification means 40 has a structure in which the raw minerals transferred from the crushing means 30 to the input pipe 41 are classified and transferred to the classification pipe 42 or the conveying pipe 43. . In FIG. 3, a classification means 40 including an input pipe 41, a classification pipe 42, and a transfer pipe 43 is shown. The raw material mineral discharged from the pulverizing means 30 is a slurry (liquid) in a solid state of about 30 to 50%, and must be sorted into an appropriate particle size in the classification means 40 in order to efficiently beneficate in a subsequent process.

According to the detailed configuration of the present invention, the classification means 40 includes a cyclone classifier 45 for classifying the slurry of raw minerals into a set particle size, and a particle size controller for controlling the particle size of the raw minerals transferred to the classification pipe 42 ( 47).

1 and 3, the cyclone classifier 45 and the particle size adjuster 47 of the classifying means 40 are revealed. The input pipe 41 is connected from the cyclone classifier 45 to the input end of the cyclone classifier 45, and the classifier pipe 42 is a particle size controller 47 and a subsequent process at one output end of the cyclone classifier 45. It is connected, and the conveyance pipe 43 is connected from the other output terminal of the cyclone classifier 45 to the input terminal of the ball mill grinder 32. The cyclone classifier 45 is also configured to be operable with VSD (variable speed). In addition, a load detector and a speed detector may be configured in the cyclone classifier 45.

The general cyclone's particle size classification method is operated only by fixing the size of the body and the nozzle diameter, so if it is necessary to adjust the classification particle size, the process is shut down and the nozzle is replaced. In that case, it causes many other problems, such as the cost of opportunity loss due to process interruption, trial and error, and precipitation of various minerals in the facility. In the present invention, the cyclone classifier 45 and the particle size adjuster 47 are installed in a modular structure, and may be set to select particles of a raw material mineral to be within 75 μm. The size of the appropriate particle size of the raw material has a great influence on the recovery rate and quality (purity) in the subsequent beneficiation process. That is, if the particle is too small, it floats on the water and flows away, and if it is too large, the flotation does not work well.

According to the classification means 40 of the present invention, it is possible to efficiently control the classification and particle size (thickness of particles) of the target raw mineral, and accordingly, the production capacity is increased by reducing investment cost and efficient system operation, thereby recovering rare materials. It contributes to increase, manpower reduction, and operation cost reduction.

On the other hand, it is also possible to further install a valve that opens and closes the pipeline on the downstream side of the classification means 40.

In addition, according to the present invention, the beneficiation means 50 is a structure for beneficiation of tungsten concentrate from the raw material transferred to the classification pipe 42 of the classification means 40. The beneficiation means 50 performs beneficiation of a rare mineral (tungsten concentrate) existing as fine particles according to the characteristics of the raw material in connection with the classification means 40. Particles of rare minerals "single-separated" by the ball mill pulverizer 32 from the raw minerals are classified into the optimal size, and the optimal conditions are maintained by a method such as flotation or specific gravity selection in a subsequent beneficiation process.

According to the detailed configuration of the present invention, the beneficiation means 50 is a sample inspector 51 for inspecting the physical properties of the raw mineral at the downstream side of the classification means 40, and the tungsten concentrate is beneficiated at the downstream side of the sample inspector 51. It is characterized in that it comprises a flotation detector (55) and a process detector (58) for detecting the concentration and flow rate upstream of the flotation detector (55).

1 and 4, a sample inspector 51, a flotation optical machine 55, and a process detector 58 of the beneficiation means 50 are exposed. The sample inspector 51 is installed in a path flowing from the classification means 40 to the beneficiation means 50 and inspects physical properties including the particle size of the raw mineral. The output end of the sample inspector 51 is connected to the transfer unit 33 through the collection pipe 52. The flotation ore 55 extracts tungsten concentrate in multiple stages using the raw water of the water supply pipe 13. A reagent supply device 53 may be selectively installed upstream of the flotation optical device 55. The process detector 58 is installed on the upstream side of the reagent supply device 53, and automatically monitors whether the raw material mineral has an appropriate concentration and flow rate. A water supply regulator 14 branching from the water supply pipe 13 is installed on the upstream side of the process detector 58.

In addition, according to the present invention, the control means 60 has a structure in which the storage means, the crushing means 20, the crushing means 30, the classifying means 40, and the beneficiation means 50 are controlled by a set algorithm. The control means 60 is based on a microprocessor, a memory, and a controller 62 of a microcomputer circuit equipped with an input/output interface. In addition to its own remote display 64, the controller 62 has a local display 64 for each process. The crushing means 20, the crushing means 30, the classifying means 40, and the beneficiation means 50 are connected to the input/output interface of the controller 62. A driving unit 66 for applying operating power is connected to the output interface of the controller 62.

According to the detailed configuration of the present invention, the control means 60 is based on a controller 62 equipped with a microcomputer circuit and a display 64, and the crushing means 20 corresponding to the input amount of the raw material by the storage means. , The grinding means 30, the classification means 40 is characterized in that it controls the variable speed. The controller 62 controls the rotational speed of the crushing means 20, the crushing means 30, and the classification means 40 within the limits of the rotational critical speed, thereby optimizing the crushing particle size and production quantity according to the characteristics of the raw mineral. Adjust under the conditions of.

As an example of operation, the controller 62 monitors the operating states of the crusher 22, the ball mill 32, and the cyclone classifier 45 together with the weight and input amount of the storage means in real time and outputs them to the display 64. . The controller 62 lowers the speed and adjusts the residence time when the load of the crusher 22, the ball mill grinder 32, and the cyclone classifier 45 is excessive. Of course, the speed of the crusher 22, the ball mill pulverizer 32, the cyclone classifier 45, and the flotation mineralizer 55 is also performed in proportion to the increase or decrease in the weight and the amount of the storage means. In addition, the controller 62 also adjusts the amount of raw water injected into the pulverizing means 30, the beneficiation means 50, and the like.

Of course, the overall automatic control status including the amount of storage in the cushion bin 15, VSD control of the rotary feeder 16 and the conveyor 21, 31, and the load/discharge amount of the ball mill 32 can be displayed on the remote/local display ( 64).

In the present invention, in addition to minerals, the amount of storage of raw materials such as all solid substances and the amount of feed to the next process can be monitored and automatically controlled in one modular structure. Solid substances include not only metallic minerals, but also non-metallic minerals, construction materials such as grain, feed, rocks, aggregates, and other solid substances. When the target material changes, it is easy to immediately start mass production by changing the main parts of the crushing means 20, the crushing means 30, the classifying means 40, and the beneficiation means 50 to a module replacement method.

In addition, according to physical properties such as Mohs hardness, compressive strength, abrasion, work index, etc. of all materials including minerals, grinding performance such as grinding particle size and production capacity can be freely adjusted and performance can be maximized.

It is apparent to those of ordinary skill in the art that the present invention is not limited to the disclosed embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such variations or modifications will have to belong to the claims of the present invention.

It is used as a continuous process method to generate rare resources through a series of processes of crushing, crushing and classifying tungsten raw material minerals.

Claims (5)

In the system for extracting tungsten concentrate based on the continuous process method: Storage means having a storage bin 10 and a cushion bin 15 for storage of raw minerals; Crushing means (20) for crushing the raw material transported from the storage bin (10) with a crusher (22); Crushing means (30) for pulverizing the raw material transported from the crushing means (20) with a ball mill pulverizer (32); Classification means 40 for classifying the raw minerals transferred from the crushing means 30 to the input pipe 41 and transferring them to the classification pipe 42 or the transfer pipe 43; Beneficiation means (50) for beneficiation of tungsten concentrate from the raw material transferred to the classification pipe (42) of the classification means (40); And Control means (60) for controlling the storage means, crushing means (20), crushing means (30), classifying means (40), and beneficiation means (50) with a set algorithm; Tungsten concentrate extraction system. The method according to claim 1, The pulverizing means 30 is a water supply regulator 14 connected to the upstream side of the ball mill pulverizer 32, a transfer unit 33 connected to the downstream side of the ball mill pulverizer 32, and the operation state of the ball mill pulverizer 32 A continuous process method of tungsten concentrate extraction system, comprising: a load detector (35) and a speed detector (36) for detecting. The method according to claim 1, The classification means 40 includes a cyclone classifier 45 for classifying the slurry of raw minerals into a set particle size, and a particle size controller 47 for adjusting the particle size of the raw minerals transferred to the classification pipe 42. Tungsten concentrate extraction system of continuous process method. The method according to claim 1, The beneficiation means 50 includes a sample inspector 51 for inspecting the physical properties of the raw mineral at the downstream side of the classifying means 40, a flotation optical machine 55 for beneficiation of tungsten concentrate from the downstream side of the sample inspector 51, and floating A continuous process method of tungsten concentrate extraction system comprising a process detector 58 that detects concentration and flow rate upstream of the beneficiation machine 55. The method according to claim 1, The control means 60 is based on a controller 62 equipped with a microcomputer circuit and a display 64, and crushing means 20, crushing means 30, and classification according to the input amount of raw minerals by the storage means. Tungsten concentrate extraction system of a continuous process method, characterized in that the means (40) is controlled at a variable speed.

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