A system for treating wolframite with sulfuric acid to prepare tungstate solution

A technology of sulfuric acid solution and wolframite, which is applied in the field of tungsten smelting, can solve the problems of less processing research, high equipment requirements, corrosion, etc., and achieve the effects of simple equipment, reduced energy consumption, and reduced consumption

Active Publication Date: 2018-09-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

"Research on New Technology of Wolframite Extraction by Acid Method" researched by Zhao Zhongwei's research group at Central South University uses sulfuric acid instead of hydrochloric acid to treat wolframite, but it uses side-grinding and leaching when processing wolframite, which requires high equipment and Adding hydrochloric acid or NaCl to increase the decomposition rate does not essentially solve the problem of Cl - The problem of corrosion and HCl volatilization, and there are few studies on the further treatment of subsequent solution and tungstic acid

Method used

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  • A system for treating wolframite with sulfuric acid to prepare tungstate solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] A wolframite (WO 3 The mass percent content is 56%), wolframite and water 1:1 are wet-milled in a vibrating mill for 10 minutes, and the particle size is 4 .

[0071] 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

[0073] A wolframite (WO 3 The mass percent content is 56%), wolframite and water 1:1 are wet-milled in a vibrating mill for 10 minutes, and the particle size is 4 .

[0074] 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

[0076] A wolframite (WO 3 The mass percent content is 56%), wolframite and water 1:1 were wet-milled in a vibrating mill for 20 minutes, and the particle size was 4 .

[0077] 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 25°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 system for preparing tungstate solution by treating wolframite through sulphuric acid. The system comprises a wolframite transformation device, a transformation material dissolving-out device and a transformation filtrate treating device. The wolframite transformation device comprises a transformation reaction container and a transformation filter, the transformation reaction container is provided with a sulphuric acid solution inlet, a wolframite inlet and a transformation reaction solution outlet. The transformation filter is provided with a transformation reaction solution inlet, a transformation reaction solution outlet and a transformation material outlet. The transformation material dissolving-out device comprises a mixing reactor and a dissolving-out filter. The mixing reactor is provided with a transformation material inlet, an ammonium salt or sodium salt solution inlet and a dissolving-out solution outlet. The dissolving-out filter is provided with a dissolving-out solution inlet, a filter residue outlet and an ammonium tungstate solution or sodium tungstate solution outlet. The transformation filtrate treating device comprises a transformation filtrate crystallization container and a crystallization filter. The transformation filtrate crystallization container is provided with an ammonium salt adding inlet. The crystallization filter is provided with an ammonium ferrous sulfate crystal outlet and a crystallization mother liquor outlet which is communicated with the sulfuric acid solution inlet. The system is high in decomposition rate, low in energy consumption, free of pollution, low in cost and convenient to operate.

Description

technical field [0001] The invention relates to a method for processing tungsten mineral raw materials and preparing a tungstate solution, in particular to a method for preparing a tungstate solution by treating wolframite with sulfuric acid, and belongs to the technical field of tungsten smelting. Background technique [0002] Industrially, the main minerals containing tungsten are wolframite and scheelite. Although wolframite reserves are small, accounting for less than 30% of the total reserves, wolframite resources are easy to mine, and the difficulty of dressing and smelting is small, which has inherent advantages compared with scheelite. [0003] There are mainly the following types of processing technology for wolframite: [0004] Soda high-pressure leaching method, tungsten mineral raw materials and soda (Na 2 CO 3 ) solution, so that tungsten enters the solution in the form of sodium tungstate, while iron, calcium, and manganese enter the slag phase in the form o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G41/00C01G49/14
CPCC01G41/00C01G49/14
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 CENT SOUTH UNIV
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