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Method for preparing APT from tungsten containing waste

A technology of tungsten waste and slurry, which is applied in the field of resource utilization of tungsten waste, which can solve the problems of high secondary slag treatment cost, large loss of raw and auxiliary materials, and low recovery rate, so as to avoid caking furnace and improve production efficiency , the effect of a large amount of processing

Inactive Publication Date: 2020-02-28
XIAMEN TUNGSTEN +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, during the treatment process of this method, the roasting equipment is seriously blocked, the slag contains high tungsten, the recovery rate is low, and the cost of secondary slag treatment is high. Moreover, APT is produced through traditional metallurgical processes, resulting in a lot of waste water and loss of raw and auxiliary materials. Big
[0004] Therefore, the existing tungsten waste treatment technology needs to be improved

Method used

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  • Method for preparing APT from tungsten containing waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Take 500g of tungsten-containing waste (95% by mass of tungsten, 1.0% by mass of cobalt, 3% by mass of oil, and 1.5% by mass of moisture), and dry the tungsten waste at a drying temperature of 150 ℃, the drying time is 6h, to obtain a drying material with an oil content of 0.3wt% and a moisture content of 0.1wt%;

[0042] (2) The dried material is crushed by the crushing equipment and passed through a 200-mesh screen to obtain crushed material with a particle size of more than 200 mesh;

[0043] (3) Add ammonia water to the crushed material, the concentration of ammonia water is 400g / L, adjust the slurry, and the solid-liquid ratio is 1t:4m 3 , And then send the obtained mixed slurry into the high-pressure oxygen leaching equipment for the high-pressure oxygen leaching reaction. The reaction conditions include speed 800r / min, temperature 200℃, oxygen pressure 3.0MPa, reaction time 24h, and oxygen is always blown during the reaction to ensure oxygen The partial pressure d...

Embodiment 2

[0045] (1) Take 500 g of tungsten-containing waste (80% by mass of tungsten, 4.5% by mass of cobalt, 5% by mass of oil, and 1% by mass of moisture), and dry the tungsten waste at a drying temperature of 120 ℃, the drying time is 12h, to obtain a drying material with an oil content of 0.3wt% and a moisture content of 0.2wt%;

[0046] (2) The dried material is crushed by crushing equipment, and passed through a 325-mesh screen to obtain crushed material with a particle size of more than 325-mesh;

[0047] (3) Add ammonia water to the crushed material, the concentration of ammonia water is 300g / L, adjust the slurry, and the solid-liquid ratio is 1t:5m 3 , And then send the obtained mixed slurry into the high-pressure oxygen leaching equipment for the high-pressure oxygen leaching reaction. The reaction conditions include the speed of 600r / min, the temperature of 180°C, the oxygen pressure of 2.2MPa, and the reaction time of 12h. The partial pressure does not change, the holding time i...

Embodiment 3

[0049] (1) Take 500 g of tungsten-containing waste (60% by mass of tungsten, 8.8% by mass of cobalt, 6% by mass of oil, and 0.2% by mass of moisture), and dry the tungsten waste at a drying temperature of 180 ℃, the drying time is 4h, the drying material with the oil content of 0.2wt% and the moisture content of 0.1wt% is obtained;

[0050] (2) The dried material is crushed by the crushing equipment and passed through a 140-mesh screen to obtain crushed material with a particle size of more than 140 mesh;

[0051] (3) Add ammonia water to the crushed material, the concentration of ammonia water is 100g / L, adjust the slurry, and the solid-liquid ratio is 1t:10m 3 , And then send the obtained mixed slurry into the high-pressure oxygen leaching equipment for the high-pressure oxygen leaching reaction. The reaction conditions include the speed of 400r / min, the temperature of 150℃, the oxygen pressure of 1.8MPa, and the reaction time of 8h. The partial pressure does not change, the hold...

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Abstract

The invention discloses a method for preparing APT from tungsten containing waste. The method comprises the steps that (1) the tungsten containing waste and ammonium hydroxide are mixed, so that mixedslurry is obtained; (2) the mixed slurry is subjected to high-pressure oxygen leaching treatment, so that reacting slurry is obtained; (3) the reacting slurry is subjected to solid-liquid separation,so that filter residues and filtrate are obtained; (4) the filtrate is concentrated, so that roughwrought APT is obtained. Thus, according to the method, tungsten in the tungsten containing waste canbe converted into the APT, the tungsten resource in the tungsten containing waste is effectively utilized, the recovery rate of tungsten reaches up to 95% or above, and the tungsten content in the tungsten containing waste is not limited.

Description

Technical field [0001] The invention belongs to the field of resource utilization of tungsten waste materials, and specifically relates to a method for preparing APT by using tungsten waste materials. Background technique [0002] Tungsten is an important strategic resource and is known as "industrial teeth". With the increasing exploitation of tungsten ore, the reserves of tungsten ore resources are shrinking day by day, and the recovery of tungsten secondary resources is particularly important. However, due to the complex and diverse components of tungsten waste, it is difficult to determine the existence of tungsten, and it is difficult to handle it. The methods for recycling tungsten waste in the prior art mainly include "zinc smelting method", "salt salt smelting method" and "roasting alkali leaching method". [0003] However, these recycling methods have various drawbacks. For example, the "zinc melting method" is based on the fact that zinc and the binder phase metals (co...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B34/36
CPCC22B7/006C22B7/008C22B34/36Y02P10/20
Inventor 王世良胡庆民周孔臣贺石强
Owner XIAMEN TUNGSTEN
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