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Process for extracting tungsten by tungsten wastes

A process method and technology for tungsten waste, applied in the field of tungsten waste pressing and sintering, can solve the problems of low tungsten conversion rate, etc., and achieve the effects of high production volume, good development, high structural strength and high temperature performance

Inactive Publication Date: 2017-05-31
HUNAN SHUNTAI TUNGSTEN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a process for extracting tungsten by using tungsten waste to solve the problem of low conversion rate of tungsten in the existing process for extracting tungsten

Method used

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  • Process for extracting tungsten by tungsten wastes
  • Process for extracting tungsten by tungsten wastes
  • Process for extracting tungsten by tungsten wastes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] 1) The proportion of ingredients is raw material: auxiliary material = 45:55. Get 100g tungsten waste material, wherein comprise the tungsten-containing catalyst of 50% (weight ratio) and the tungsten-containing grinding material of 50% (weight ratio), promptly the add-on of tungsten-containing catalyst is 50g, the add-on of tungsten-containing grinding material is 50g, so that the chemical composition of the raw material is WO 3 Accounted for 14.5%, SiO 2 41.5%, Al 2 o 3 It accounts for 24.1%, and the rest is phosphorus, arsenic, copper, chromium, cobalt, nickel, fluorine and carbon. According to WO 3 According to the stoichiometric calculation of theoretical consumption, add 4 times of soda ash to the tungsten waste, the addition coefficient of soda ash is 0.457; then add 1 times of caustic soda, the addition coefficient of caustic soda is 0.345; add 0.05 times of saltpeter again, Addition coefficient of saltpeter is 1.

[0072] 2) The raw materials and auxiliar...

Embodiment 2

[0076] 1) The proportion of ingredients is raw material: auxiliary material = 60:40. Get 200g tungsten waste material, wherein comprise the tungsten-containing catalyst of 55% (weight ratio) and the tungsten-containing grinding material of 45% (weight ratio), promptly the add-on of tungsten-containing catalyst is 110g, the add-on of tungsten-containing grinding material is 90g, so that the chemical composition of the raw material is WO 3 34.5%, SiO 2 35.1%, Al 2 o 3 It accounts for 20%, and the rest is phosphorus, arsenic, copper, chromium, cobalt, nickel, fluorine and carbon. According to WO 3 According to the stoichiometric calculation of the theoretical consumption, add 5 times of soda ash to the tungsten waste, the addition coefficient of soda ash is 0.457; then add 1 times of caustic soda, the addition coefficient of caustic soda is 0.345; add 0.05 times of saltpeter again, Addition coefficient of saltpeter is 1.

[0077] 2) The raw materials and auxiliary materials...

Embodiment 3

[0081] 1) The proportion of ingredients is raw material: auxiliary material = 50:50. Get 300g tungsten scrap, including 50% (weight ratio) of iron-containing tungsten scrap and 50% (weight ratio) of tungsten-containing abrasive, that is, the addition of tungsten-containing scrap is 150g, and the addition of tungsten-containing abrasive The amount is 150g, so that the chemical composition of the raw material is WO 3 Accounting for 25.2%, SiO 2 38.5%, Al 2 o 3 It accounts for 22.3%, and the rest is phosphorus, arsenic, copper, chromium, cobalt, nickel, fluorine and carbon. According to WO 3 According to the stoichiometric calculation of the theoretical consumption, add 4.5 times of soda ash to the tungsten waste, the soda ash addition coefficient is 0.457; then add 1 times of caustic soda, the caustic soda addition coefficient is 0.345; then add 0.05 times of saltpeter, Addition coefficient of saltpeter is 1.

[0082] 2) The raw materials and auxiliary materials are mixed ...

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Abstract

The invention provides a process for extracting tungsten by tungsten wastes. The process comprises the following steps: raw materials-tungsten wastes are mixed with accessories to obtain a mixture; the mixture is pressed by forming equipment to obtain a pre-burnt material; the pre-burnt material is put in a heating furnace for sintering to obtain a sintered material; the sintered material is dipped in water to obtain leaching liquid; the leaching liquid is used for extracting tungsten; the method uses the tungsten wastes as the raw materials, and uses soda, caustic soda flakes and niter as the accessories; the content of the raw materials is 45-60%; and the content of the accessories is 40-55%. The process is high in generation quantity of sodium tungstate in the sintered material through the matching ratio and the chemical components of the raw materials, extracts pure compounds of tungsten to reduce the content of insoluble tungsten in the sintered material so as to improve the conversion ratio of tungsten through a sintering process, a water leaching process and an extracting process, can reach the conversion ratio of tungsten above 98%, and controls the content of insoluble tungsten within 0.5%.

Description

technical field [0001] The invention relates to the technical field of tungsten waste pressing and sintering, in particular to a process method for extracting tungsten from tungsten waste. Background technique [0002] Tungsten and its alloys are widely used in iron and steel industry, equipment industry, information industry, electrical industry and many other fields, and are one of the mineral resources in my country's internationally advantageous regions. Tungsten scrap is waste grinding material containing tungsten, which is a very important secondary resource for tungsten extraction. Because of its unique properties, tungsten waste is a kind of rare metal mineral resource. Recovering tungsten from tungsten waste is an extremely important industrial material in modern industry, national defense and high-tech applications. It plays a very important role in our national economy. Using tungsten waste to recycle tungsten resources can not only improve the comprehensive uti...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B34/36C22B1/16
CPCC22B1/16C22B7/006C22B34/36C22B34/365Y02P10/20
Inventor 眭成赵泽安李斌
Owner HUNAN SHUNTAI TUNGSTEN IND
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