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Tungsten-contained material treating method

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

Inactive Publication Date: 2015-08-19
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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  • Tungsten-contained material treating method

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 tungsten-contained material treating method aims at enabling a specific value of the 0.5 order power of mass percent of tungsten trioxide to the mass percent of silicon dioxide in raw materials to be smaller or equal to 0.5-0.8 by ore blending; the method comprises the following steps: placing tungsten-contained material solid in crushing equipment for crushing to ideal particle size; then adding a decomposer, namely, sodium hydroxide or a sodium hydroxide solution, stirring, adding a small quantity of water while adding the decomposer, and controlling a mixing volume to be 0.9-1.2 times that of the tungsten-contained material; controlling decomposition temperature to be 120-200 DEG C, preserving the temperature for 2-5hours after the decomposition temperature is achieved; controlling solution temperature to be 50-100 DEG C after unloading, dropwise adding a cinchonine solution, washing the solution of pressure filter residue till no white precipitate exists, as a washing end point, unloading a pressure filter plate and roughing slag. According to the method, the waste of impurity silicon dioxide in ore is made profitable, after achieving a grade during ore blending, the silicon dioxide becomes an inhibitor of alkaline earth metal, and the tungsten content of decomposed slag is smaller 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 Applications(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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