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Pretreatment method of tungsten mineral materials

A mineral raw material and pretreatment technology, applied in the field of tungsten smelting, to achieve the effect of low roasting temperature, wide adaptability and lower roasting temperature

Active Publication Date: 2014-12-24
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Because of this, there are no appropriate measures in the prior art to strengthen the leaching performance of tungsten mineral raw materials in ammonium carbonate solution system

Method used

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  • Pretreatment method of tungsten mineral materials

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Experimental program
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Effect test

Embodiment 1

[0048] A certain scheelite (WO 3 The mass percentage content is 49.53%, the Fe mass percentage content is 0.57%), according to tungsten to generate Ca 3 WO 6 Add calcium carbonate 1.1 times the theoretical amount, and add calcium fluoride with 2% scheelite content, mix and grind, and pass through a 325-mesh sieve (particle size 3 WO 6 .

Embodiment 2

[0050] A certain scheelite (WO 3 The mass percent composition is 49.53%, and the Fe mass percent composition is 0.57%), according to generating Ca 3 WO 6 1.1 times of the theoretical amount is mixed with calcium carbonate, ground and mixed to obtain raw meal, and passed through a 325-mesh sieve. Then, in the roasting furnace, under the air atmosphere, roast at 800°C for 2.0h to obtain the clinker. The X-ray diffraction analysis results show that the tungsten-containing phase in the clinker contains Ca 3 WO 6 and CaWO 4 .

Embodiment 3

[0052] A certain scheelite (WO 3 The mass percent composition is 49.53%, and the Fe mass percent composition is 0.57%), according to generating Ca 3 WO 6 1.3 times the theoretical amount is added to calcium carbonate, and calcium fluoride with 7% scheelite content is added, and the raw meal is obtained after grinding and mixing, and passed through a 200-mesh sieve. Then, in the roasting furnace, under oxidative atmosphere, roast at 850°C for 1.5h to obtain the clinker. The X-ray diffraction analysis results show that the only tungsten-containing phase in the clinker is Ca 3 WO 6 .

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Abstract

Disclosed is a pretreatment method of tungsten mineral materials. The pretreatment method of the tungsten mineral materials is characterized by including the following steps of raw material preparation and clinker sintering, the raw material preparation includes that the tungsten mineral materials (scheelite, wolframite, scheelite and wolframite mixed mineral and / or tungsten fine silt) are mixed with a certain quantity of calcic substances and mineralizer to be finely ground to obtain raw materials, and the clinker sintering includes that the prepared raw materials are calcinated under special conditions to obtain clinker. The pretreatment method of the tungsten mineral materials has the advantages that the adaptability is wide, and the method is suitable for all tungsten mineral materials, especially scheelite; (2) added calcic substances are cheap and easy to obtain; (3) the calcination temperature is low, the operation is simple, and the industrial application is easy; (4) tungsten in the obtained clinker is good in leaching performance, fully leaching can be achieved by a sodium carbonate solution or an ammonium carbonate salt solution at low temperature, especially when leaching is performed by the ammonium carbonate salt solution, the economical circulation of the solution during APT production can be achieved, and thereby, discharging of wastewater during production can be eliminated.

Description

technical field [0001] The invention relates to a pretreatment method for tungsten mineral raw materials, belonging to the technical field of tungsten smelting. Background technique [0002] At present, the technical route for preparing APT in industry mainly includes: using caustic soda or soda to cook and decompose tungsten mineral raw materials at high temperature → crude sodium tungstate solution → solution purification and transformation → pure ammonium tungstate solution → evaporation crystallization → APT → product washing. In the process of APT preparation, because the solution is difficult to circulate economically, the consumption of auxiliary materials is large, and a large amount of waste water is generated, causing serious environmental pollution. [0003] In recent years, attention has been paid to the leaching system using ammonium carbonate solution as the tungsten mineral raw material. Unfortunately, the existing industrial tungsten mineral raw materials ar...

Claims

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Application Information

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IPC IPC(8): C22B34/36C22B3/14C22B1/02
CPCY02P10/20
Inventor 李小斌崔源发周秋生李建圃齐天贵徐双刘桂华林国荣彭志宏李继红徐向明徐旺
Owner CENT SOUTH UNIV
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