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A method of processing tungsten-containing materials

A material and raw material technology, which is applied in the field of processing tungsten-containing materials, can solve the problems of corrosion of iron equipment, general operating environment, and high price of decomposers, achieve good recovery rate, good operating environment, and improve the effect of decomposition

Inactive Publication Date: 2017-06-13
江钨世泰科钨品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The "sodium carbonate decomposition method" for decomposing tungsten-containing materials uses sodium carbonate as the decomposing agent. Decompose scheelite); the decomposing agent is expensive and rarely used, and the tungsten content of the external slag is less than 1%

Method used

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  • A method of processing tungsten-containing materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1. The process of crushing solid tungsten-containing materials

[0043] (1) Strict ore blending system: m (SiO2) =0.5×m (WO3) ^0.5, where m (SiO2) After the ore blending is completed, the mass fraction of silicon dioxide in the material (%); m (WO3) After the ore blending is completed, the material contains tungsten trioxide mass fraction (%).

[0044] (2) Place the tungsten-containing material in a pulverizing device (preferably a ball mill), and grind until the particle size is less than 75 microns and greater than 95%.

[0045] 2. Slurry mixing process

[0046] Add decomposition agent sodium hydroxide or sodium hydroxide solution (preferably sodium hydroxide) to the mixing tank, and its addition amount is 2.5 times of the theoretical value. Turn on the stirring, and add a small amount of water while adding the decomposing agent, so as to prevent the stirring from being invalid due to excessive viscosity, 1m 3 The final mixing volume of crushed tungsten-containi...

Embodiment 2

[0053] 1. The process of crushing solid tungsten-containing materials

[0054] (1) Strict ore blending system: m (SiO2) ≥0.6×m (WO3) ^0.5, where m (SiO2) After the ore blending is completed, the mass fraction of silicon dioxide in the material (%); m (WO3) After the ore blending is completed, the material contains tungsten trioxide mass fraction (%).

[0055] (2) Place the tungsten-containing material in a pulverizing device (preferably a ball mill), and grind until the particle size is less than 50 microns and greater than 95%.

[0056] 2. Slurry mixing process

[0057] Add decomposition agent sodium hydroxide or sodium hydroxide solution (preferably sodium hydroxide) to the mixing tank, and its addition is 2.1 times of the theoretical value. Turn on the stirring, and add a small amount of water while adding the decomposing agent, so as to prevent the stirring from being invalid due to excessive viscosity, 1m 3 The final mixing volume of crushed tungsten-containing mate...

Embodiment 3

[0064] 1. The process of crushing solid tungsten-containing materials

[0065] (1) Strict ore blending system: m (SiO2) ≥0.65×m (WO3) ^0.5, where m (SiO2) After the ore blending is completed, the mass fraction of silicon dioxide in the material (%); m (WO3) After the ore blending is completed, the material contains tungsten trioxide mass fraction (%).

[0066] (2) Place the tungsten-containing material in a crushing device (preferably: a ball mill), and grind it until the particle size is less than 45 microns and greater than 97%.

[0067] 2. Slurry mixing process

[0068] Add decomposition agent sodium hydroxide or sodium hydroxide solution (preferably sodium hydroxide) to the mixing tank, and its addition is 2.3 times of the theoretical value. Turn on the stirring, and add a small amount of water while adding the decomposing agent, so as to prevent the stirring from being invalid due to excessive viscosity, 1m 3 The final mixing volume of crushed tungsten-containing ma...

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Abstract

A method for processing tungsten-containing materials, through ore blending, the ratio of the 0.5 power of the mass percentage of tungsten trioxide contained in the raw material to the mass percentage of silicon dioxide in the raw material is less than or equal to 0.5 to 0.8; the solid tungsten-containing material is placed in a crushing device Crush to the ideal particle size; then add the decomposition agent sodium hydroxide or sodium hydroxide solution, stir, add a small amount of water while adding the decomposition agent, and control the volume of the slurry to be 0.9 to 1.2 times that of the tungsten-containing material; control the decomposition temperature to 120 ~ 200°C, after the decomposition temperature is reached, the holding time is 2-5h; control the solution temperature after unloading at 50-100°C, add cinchonine solution dropwise, the solution of washing the press filter residue has no white precipitate, which is the washing end point, and the filter plate is unloaded to remove the slag . According to the invention, the impurity silicon dioxide in the ore can be turned from waste to treasure, and after the silicon dioxide reaches a high grade during ore blending, it becomes an inhibitor of alkaline earth metal, so that the tungsten content of the decomposed slag is less than 1%.

Description

technical field [0001] The invention relates to a method for treating materials containing tungsten. The present invention also relates to a method for obtaining sodium tungstate solution with low impurity content. In addition, the present invention also relates to a method for preparing ammonium paratungstate. [0002] In this specification, the term "tungsten-containing material" refers to tungsten ore, tungsten-containing scrap after ore dressing, and tungsten-containing slag after decomposition of tungsten ore, etc., such as: scheelite, wolframite, black and white mixed ore, ore Decomposed slag containing tungsten. [0003] The term "mineral blending" refers to the mixing of tungsten-containing materials in a certain proportion for different batches according to the test results. Background technique [0004] Tungsten is a refractory non-ferrous metal and an important strategic resource. It is widely used because of its excellent properties such as high melting point,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/00
Inventor 林国荣李继红
Owner 江钨世泰科钨品有限公司
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