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A method for extracting tungsten by decomposing wolframite or black and white tungsten mixed ore under pressure with hydrochloric acid-phosphoric acid

A technology of black and white tungsten and wolframite, applied in the field of hydrometallurgy, can solve the problems of increasing tungsten ore processing procedures and production equipment, increasing the cost of tungsten ore decomposition, and achieving low decomposition cost, simple operation and reduced production cost Effect

Active Publication Date: 2020-03-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the additional treatment measures for wolframite adopted in the above patents undoubtedly increase the processing procedures and production equipment of tungsten ore, which also increases the decomposition cost of tungsten ore.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This embodiment relates to a method for extracting tungsten from wolframite, comprising the following steps:

[0041] 1) The particle size is 60μm, WO 3The grade is 60% wolframite powder and the mixed acid solution of phosphoric acid and hydrochloric acid is mixed according to the mass volume 1:5, the concentration of phosphoric acid in the mixed acid solution is 170g / L, the concentration of hydrochloric acid is 100g / L, and the reaction system is stirred After uniformity, pressurize the system to 3.6MPa, maintain the temperature of the reaction system at 220°C, stop the pressurization after 4.0 hours of reaction, and lower the reaction system to room temperature;

[0042] 2) Filter the reacted system to obtain a filtrate, then use 25% TBP+10% sec-octanol+kerosene as the organic phase to extract the filtrate for 10 minutes at 40°C, and obtain a raffinate after the extraction is completed; Oxygen is added to the raffinate, and 40% TBP+kerosene is used as the organic phas...

Embodiment 2

[0044] This embodiment relates to a method for extracting tungsten from wolframite, comprising the following steps:

[0045] 1) The particle size is 120μm, WO 3 The grade of 36% wolframite powder and the mixed acid solution of phosphoric acid and hydrochloric acid are mixed according to the mass volume 1:6, the concentration of phosphoric acid in the mixed acid solution is 120g / L, the concentration of hydrochloric acid is 70g / L, and the reaction system is stirred After uniformity, pressurize the system to 2.8MPa, maintain the temperature of the reaction system at 200°C, stop the pressurization after 4.0 hours of reaction, and lower the reaction system to room temperature;

[0046] 2) Filter the reacted system to obtain a filtrate, then use 40% sec-octanol + kerosene as the organic phase to extract the filtrate at 40°C for 10 minutes, and obtain a raffinate after the extraction is completed; add an oxidant to the raffinate Hydrogen peroxide, and then use 40% TBP+kerosene as th...

Embodiment 3

[0048] This embodiment relates to a method for extracting tungsten from wolframite, comprising the following steps:

[0049] 1) The particle size is 200μm, WO 3 The grade of 20% wolframite powder and the mixed acid solution of phosphoric acid and hydrochloric acid are mixed according to the mass volume 1:8, the concentration of phosphoric acid in the mixed acid solution is 80g / L, the concentration of hydrochloric acid is 50g / L, and the reaction system is stirred After uniformity, pressurize the system to 1.6MPa, maintain the temperature of the reaction system at 150°C, stop the pressurization after 5.0 hours of reaction, and lower the reaction system to room temperature;

[0050] 2) Filter the reacted system to obtain a filtrate, then use 40% N235+kerosene as the organic phase to extract the filtrate at 40°C for 10 minutes, and obtain a raffinate after the extraction is completed; finally add oxidant chlorine to the raffinate, Then use 40% TBP+kerosene as the organic phase to...

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Abstract

The invention relates to a method for extracting tungsten by decomposing wolframite or black-and-white tungsten mixed ore under pressure with hydrochloric acid-phosphoric acid. During the process of extracting tungsten from China, the reaction system is pressurized so that the temperature is higher than 100°C. The present invention can directly extract tungsten from wolframite or the mixed ore of black and white tungsten without adding additional calcium-containing compounds to transform wolframite during the process of extracting tungsten by applying pressure, which simplifies the production process. Reduced production costs.

Description

technical field [0001] The invention belongs to the extraction of metal tungsten in the field of hydrometallurgy, and in particular relates to a method for decomposing wolframite or black and white tungsten mixed ore by pressing. Background technique [0002] China's tungsten resource reserves rank first in the world, among which scheelite accounts for more than 2 / 3 of the tungsten resource reserves. Chinese invention patents 201010605095.1, 201010605107.0, 201010605103.2, 201010605110.2, 201010605094.7 propose a new method of synergistically decomposing tungsten ore using sulfuric acid-phosphoric acid. The decomposition of scheelite is realized, and a new smelting process is provided for the extraction of scheelite. [0003] However, when sulfuric acid-phosphoric acid synergistic decomposition technology is used to directly leach wolframite and black and white tungsten mixed ore, which account for 1 / 3 of my country's tungsten resource reserves, the leaching rate of tungsten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B34/36C22B3/06C22B3/26C22B3/28C22B3/40C22B3/38C22B3/44
CPCC22B3/06C22B3/44C22B34/36C22B3/262C22B3/282C22B3/3846C22B3/409Y02P10/20
Inventor 陈星宇赵中伟刘旭恒李江涛何利华
Owner CENT SOUTH UNIV
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