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A method for recovering tungsten from tungsten smelting slag

A technology of smelting slag and ore pulp, which is applied in the field of solid waste recycling, can solve the problems of low grade and recovery rate, high material viscosity, difficult to recycle tungsten, etc., and achieve the effect of high recovery rate, easy acquisition and high grade

Active Publication Date: 2020-05-29
有研资源环境技术研究院(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Tungsten smelting slag is made of tungsten concentrate as raw material, which is produced by caustic soda pressure cooking. The slag has a fine particle size (-400 mesh accounts for 100%) and tungsten minerals are brittle. A large amount of muddy tungsten minerals are produced, which have a large specific surface area and are covered with chemicals on the surface. The characteristics of these minerals make it impossible to effectively recover fine tungsten by conventional gravity separation and flotation processes.
According to literature records, some scholars use disc concentrator and centrifugal concentrator to recover fine-grained tungsten, but the grade and recovery rate are low. The ultra-fine tungsten in the particle size range has exceeded the range of gravity recovery, and this part of tungsten is basically difficult to recover; some scholars have carried out research on the recovery of fine tungsten by means of flotation, and the fine tungsten cannot be recovered effectively. Because tungsten smelting slag is produced after caustic soda pressure cooking, the material has a high viscosity, and it is difficult for the flotation agent to fully act on every ore particle, especially the ultra-fine tungsten within the particle size range of -10um

Method used

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  • A method for recovering tungsten from tungsten smelting slag
  • A method for recovering tungsten from tungsten smelting slag
  • A method for recovering tungsten from tungsten smelting slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Mineral raw materials:

[0019] The material used is tungsten smelting slag (black and white tungsten mixed), the material particle size is -37 microns, the tungsten content is 1.67% (black tungsten 0.81%, scheelite 0.86%), the gangue mineral calcium oxide content is 51.42%, and the fluorite content Calcite is 18.45%, calcite is 5.87%, chlorite content is 3.92%, and other minerals account for 18.67%.

[0020] 2. Drugs and operating conditions:

[0021] a. Rough selection

[0022]

[0023] b.Sweep

[0024] Sodium fluorosilicate 375g / t

[0025] 731 oxidized paraffin soap 300g / t

[0026] BY-2 15g / t

[0027] c. Featured

[0028] Sodium fluorosilicate 75g / t

[0029] BY-2 10g / t

[0030] 3. Specific operation:

[0031] After the tungsten smelting slag is naturally dried, it is divided evenly by the stacking cone method. First, water is added to adjust the concentration to 10%, and it is placed in a high-speed slurry mixing drum with a stirring speed of 2000r / min...

Embodiment 2

[0034] 1. Mineral raw materials:

[0035] The material used is scheelite smelting slag, the material particle size is -37 microns, the tungsten content is 1.56%, the gangue mineral calcium oxide content is 51.77%, the fluorite content is 15.87%, the calcite content is 8.23%, and the chlorite content is 10.34%. , other minerals accounted for 12.23%.

[0036] 2. Drugs and operating conditions:

[0037] rough selection

[0038]

[0039] scan

[0040] Sodium Fluosilicate 300g / t

[0041] 731 oxidized paraffin soap 300g / t

[0042] BY-2 15g / t

[0043] Featured

[0044] Sodium fluorosilicate 75g / t

[0045] BY-2 10g / t

[0046] 3. Specific operation:

[0047] After the tungsten smelting slag is naturally dried, it is divided evenly by the stacking cone method. First, water is added to adjust the concentration to 10%, and it is placed in a high-speed slurry mixing drum with a stirring speed of 2000r / min to stir for 30-60 minutes, so that the fine-grained tungsten and fine-gra...

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PUM

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Abstract

The invention belongs to the technical field of solid waste recycling, and relates to a method for recovering tungsten from tungsten smelting slag. The method comprises the specific steps: after naturally airing the tungsten smelting slag, uniformly dividing the aired tungsten smelting slag by adopting a coning method, adding water until the concentration of a solution is adjusted to be 10% at first, and putting in a high-speed ore pulp mixing drum with the rotating speed of stirring being 2,000 r / min for stirring for 30-60 minutes, so that fine-grain tungsten and fine-grain gangue are pre-dispersed; placing pre-dispersed ore pulp in a flotation machine for flotation tests, adding ore pulp regulator sulfuric acid, a tungsten dispersant maleic acid-acrylic acid (MA-AA) copolymer, gangue inhibitor sodium fluorosilicate, flocculant starch, tungsten collector 731 oxidized paraffin wax soap and a foaming agent BY-2, and conducting roughing to obtain tungsten rough concentrates; and after performing two-time flotation operation on the tungsten rough concentrates, obtaining tungsten concentrates, and at the same time, conducting two-time scavenging operation on roughed ore pulp to obtaintailings. Through the adoption of the method, tungsten in the tungsten smelting slag can be effectively recovered; the method is particularly suitable for recovering fine-grain (-10 micros) tungsten in the tungsten smelting slag; the process of recovering tungsten through flotation is mature; and industrial production is easily realized.

Description

technical field [0001] The invention belongs to the technical field of solid waste recovery and utilization, and in particular relates to a method for recovering tungsten from tungsten smelting slag. Background technique [0002] Tungsten smelting slag is made of tungsten concentrate as raw material, which is produced by caustic soda pressure cooking. The slag has a fine particle size (-400 mesh accounts for 100%) and tungsten minerals are brittle. A large number of muddy tungsten minerals are produced, which have a large specific surface area and the surface is covered with chemicals. These mineral characteristics make it impossible to effectively recover fine tungsten by conventional gravity separation and flotation processes. According to literature records, some scholars use disc concentrator and centrifugal concentrator to recover fine-grained tungsten, but the grade and recovery rate are low. The ultra-fine tungsten in the particle size range has exceeded the range of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/018B03D3/06B03D101/00B03D101/02B03D101/06
CPCB03D1/018B03D3/06B03D2201/002B03D2201/007B03D2201/02B03D2201/06
Inventor 杨俊彦郑其闫国庆王力军车小奎张建东
Owner 有研资源环境技术研究院(北京)有限公司