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Method for separating tungsten and molybdenum from tungsten and molybdenum sulfide concentrate

A technology of molybdenum concentrate and tungsten sulfide, applied in the field of separation of tungsten and molybdenum, can solve the problems of technical confidentiality and so on

Active Publication Date: 2017-08-11
HUNAN RARE EARTH METAL MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the promotion of the use of molybdenum products, the purity requirements of molybdenum products are getting higher and higher, and the tungsten in molybdenum products needs to be separated deeply; at present, the separation technology of tungsten and molybdenum in China is often extensive, and the tungsten in molybdenum products is still difficult to separate. Thorough separation, the technical problem of how to improve the separation factor of tungsten and molybdenum, is still in the research and development stage in China; while foreign companies in Germany, Japan, the United States and other countries developed earlier, but kept the technology secret

Method used

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  • Method for separating tungsten and molybdenum from tungsten and molybdenum sulfide concentrate
  • Method for separating tungsten and molybdenum from tungsten and molybdenum sulfide concentrate
  • Method for separating tungsten and molybdenum from tungsten and molybdenum sulfide concentrate

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Embodiment 1

[0054] A method for separating tungsten and molybdenum from tungsten and molybdenum sulfide concentrates in this embodiment comprises the following steps:

[0055] Dissolution: Weigh 50 grams of tungsten and molybdenum sulfide concentrate raw materials and place them in a glass, in which MoS 2 82.5%, WS 2 17.5%; according to the solid-liquid ratio of tungsten-molybdenum sulfide concentrate and the first ammonia solution is 1:15, add the first ammonia solution, stir at room temperature for 5 minutes, dissolve until clear, wherein, the molar concentration of the first ammonia solution is 1.25mol / L.

[0056] The first extraction: use 3mol / L sulfuric acid solution to adjust the feed liquid to a pH of 2, add it to the No. 1 organic extractant at a volume ratio of 1:1 for secondary extraction, and the extraction time is 30 minutes to obtain a molybdenum-containing extract and raffinate. The No. 1 organic extractant used is a mixture of di-isooctyl phosphate and kerosene, measure...

Embodiment 2

[0067] A method for separating tungsten and molybdenum from tungsten and molybdenum sulfide concentrates in this embodiment comprises the following steps:

[0068] Dissolution: Weigh 40 grams of tungsten and molybdenum sulfide concentrate raw materials and place them in a glass, in which MoS 2 79.4%, WS 2 20.2%; according to the solid-liquid ratio of tungsten-molybdenum sulfide concentrate and the first ammonia solution is 1:25, add the first ammonia solution, stir at room temperature for 5 minutes, dissolve until clear, wherein, the molar concentration of the first ammonia solution is 1.25mol / L.

[0069] The first extraction: Use 3mol / L sulfuric acid solution to adjust the feed liquid to pH 3, and add it to No. 1 organic extractant at a volume ratio of 1:2 for secondary extraction. The extraction time is 30 minutes to obtain molybdenum-containing extracts and raffinate. The No. 1 organic extractant used is a mixture of di-isooctyl phosphate and kerosene, measured accordin...

Embodiment 3

[0080] A method for separating tungsten and molybdenum from tungsten and molybdenum sulfide concentrates in this embodiment comprises the following steps:

[0081] Dissolution: Weigh 50 grams of tungsten and molybdenum sulfide concentrate raw materials and place them in a glass, in which MoS 2 82.5%, WS 2 17.5%; according to the solid-liquid ratio of tungsten-molybdenum sulfide concentrate and the first ammonia solution is 1:15, add the first ammonia solution, stir at room temperature for 5 minutes, dissolve until clear, wherein, the molar concentration of the first ammonia solution is 1.25mol / L.

[0082] The first extraction: use 3mol / L sulfuric acid solution to adjust the feed liquid to pH 3, and add it to No. 1 organic extractant at a volume ratio of 1:1 for secondary extraction. The extraction time is 30 minutes, and the molybdenum-containing extract and raffinate. The No. 1 organic extractant used is a mixture of di-isooctyl phosphate and kerosene, measured according ...

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Abstract

The invention relates to a method for separating tungsten from tungsten-molybdenum sulfide concentrate. Dissolve the tungsten and molybdenum sulfide concentrate with ammonia water, adjust the pH and use No. 1 organic extractant for two-stage extraction, and extract the extract with ammonia water to obtain ammonium molybdate solution. After adding hydrogen peroxide and sulfuric acid to the raffinate, it is extracted with No. 2 organic extractant, and the raffinate is neutralized with ammonia water to obtain an ammonium molybdate solution. The ammonium molybdate solution was evaporated and recrystallized twice to obtain ammonium molybdate crystals. The method has the advantages of simple and reasonable process, conditions and easy control, short process flow, low equipment investment, high product yield, etc., and has great practical value, and the mass percentage of W / Mo in the obtained ammonium molybdate crystal is less than 0.05%, The molybdenum recovery rate is greater than 90%.

Description

technical field [0001] The invention relates to the field of rare metals, in particular to a method for separating tungsten and molybdenum from tungsten and molybdenum sulfide concentrates. Background technique [0002] my country is a big producer and consumer of tungsten and molybdenum. Tungsten and molybdenum are widely used in various fields of industry. Molybdenum is not only used in petroleum catalysts, enamel pigments and medicines, but also in the preparation of hard alloys, super alloys, various Stainless steel and chemical products and other products. With the promotion of the use of molybdenum products, the purity requirements of molybdenum products are getting higher and higher, and the tungsten in molybdenum products needs to be separated deeply; at present, the separation technology of tungsten and molybdenum in China is often extensive, and the tungsten in molybdenum products is still difficult to separate. Thorough separation, the technical problem of how to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/14C22B3/38C22B3/40C22B3/28C22B34/34C22B34/36
CPCC22B3/14C22B34/34C22B34/36C22B3/26C22B3/402Y02P10/20
Inventor 刘荣丽王志坚易师邹龙
Owner HUNAN RARE EARTH METAL MATERIAL RES INST