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Method for processing scheelite concentrate through sulfuric acid to prepare tungstate solution

A technology of sulfuric acid solution and scheelite, which is applied in the field of tungsten smelting to achieve the effect of reducing energy consumption, easy mass production and stable recovery rate

Inactive Publication Date: 2016-09-07
江钨高技术开发应用有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, there is no precedent in the prior art for treating scheelite with only sulfuric acid

Method used

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  • Method for processing scheelite concentrate through sulfuric acid to prepare tungstate solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] A scheelite (WO 3 The mass percent content is 52.07%), scheelite and water 1:1 were wet-milled in a vibration mill for 5 minutes, and the particle size was 4 .

[0066] Prepare the ammonium carbonate solution with a final theoretical excess of 100g / L containing 5% NH 3 ·H 2 O, add the above transformation material into the solution, the liquid-solid ratio is 3:1, the temperature is 30°C, react for 2 hours, filter to obtain ammonium tungstate solution, and the tungsten content in the filter residue is <1%.

Embodiment 2

[0068] A scheelite (WO 3 The mass percent content is 52.07%), scheelite and water 1:1.2 were wet-milled in a vibration mill for 5 minutes, and the particle size was 4 .

[0069] Prepare a theoretical concentration of sodium carbonate solution, add the above transformation materials into the solution, the liquid-solid ratio is 3:1, the temperature is 30°C, react for 2 hours, filter to obtain sodium tungstate solution, and the tungsten content in the filter residue is <3%.

Embodiment 3

[0071] A scheelite (WO 3 The mass percent content is 52.07%), scheelite and water 1:1.3 were wet-milled in a vibration mill for 10 minutes, and the particle size was 4 .

[0072] Prepare the final ammonium carbonate solution with a theoretical excess of 150g / L containing 5% NH 3 ·H 2 O, add the above transformation material into the solution, the liquid-solid ratio is 3:1, the temperature is 35°C, react for 1h, and filter to obtain ammonium tungstate solution, the tungsten content in the filter residue is <1%.

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Abstract

The invention discloses a preparation method of tungstate solution. The preparation method is characterized by comprising the following steps: a traditional hydrochloric acid decomposition process is discarded to prevent bad Cl- corrosion and the HCl volatilization problem; sulfuric acid is adopted to treat scheelite, so that WO3 and Ca are separated in a precipitation form; the scheelite is transformed to obtain transformed filtrate and a transformed material; after the transformed filtrate is replenished with the sulfuric acid, the transformed filtrate is returned into the scheelite transformation process; the transformed material is dissolved out, and is mixed with a common accessory easy to get for reaction under normal temperature or high temperature and normal pressure or high pressure; a liquid phase generated in the dissolving process is comprehensively used in a no-pollutant discharge manner; and a solid phase is separated and washed to obtain dissolved slag and tungstate solution. The method prepares the tungstate solution by treating the scheelite with sulfuric acid, and is high in resolution ratio, low in energy consumption, free of pollution, low in cost, convenient for operation and environmentally friendly.

Description

technical field [0001] The invention relates to a method for processing tungsten mineral raw materials and preparing tungstate solution, in particular to a method for preparing tungstate solution by treating scheelite concentrate with sulfuric acid, belonging to the technical field of tungsten smelting. Background technique [0002] Industrially, the main minerals containing tungsten are wolframite and scheelite. However, wolframite reserves are small, coupled with years of continuous mining, they have been basically exhausted. At present, scheelite and black and white tungsten mixed ore have large reserves and are mainly circulated in the market. [0003] For the treatment process of scheelite, it is mainly divided into two types in industry: one is the alkali decomposition process, and the scheelite (CaWO 4 ) into insoluble calcium salts into the slag phase, while tungsten is converted into soluble tungstates; one is the acid decomposition process, in which the calcium i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/36C22B3/08C01G41/00
CPCC01G41/00C22B3/08C22B34/36Y02P10/20
Inventor 李小斌崔源发周秋生罗建新齐天贵李建圃刘桂华徐双彭志宏申雷霆
Owner 江钨高技术开发应用有限公司
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