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Method of purifying ammonium tungstate solution

A solution purification, ammonium tungstate technology, applied in the direction of improving process efficiency, can solve the problem of ammonium tungstate solution purification methods need to be improved, and achieve the effect of simplifying operation, shortening process flow and improving efficiency

Active Publication Date: 2012-09-26
CHONGYI ZHANGYUAN TUNGSTEN +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] Therefore, the current purification methods for ammonium tungstate solution still need to be improved.

Method used

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  • Method of purifying ammonium tungstate solution

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Effect test

Embodiment 1

[0030] At room temperature, take 300ml containing WO 3Ammonium tungstate solution with a concentration of 230g / l and a phosphorus concentration of 0.22g / l is placed in a 500ml beaker, and an industrial ammonium sulfide solution of 1%-3.5% of the volume of the ammonium tungstate solution is added and stirred evenly, and then added to the above mixture respectively 1 to 1.4 times the theoretical amount of basic magnesium carbonate, magnesium sulfate heptahydrate, magnesium oxide, magnesium carbonate, magnesium hydroxide for deep phosphorus removal (for basic magnesium carbonate, magnesium sulfate heptahydrate, magnesium oxide, magnesium carbonate, hydroxide Magnesium, the amount of magnesium salt of 1 times the theoretical amount is respectively: 0.2069g, 0.5245g, 0.0858g, 0.1795g, 0.1235g), the pH value of the reaction solution=9-10, and the reaction time of phosphorus removal is 120min; After analysis, the experimental results are as follows:

[0031] 1. The effect of basic m...

Embodiment 2

[0052] Take 300ml of ammonium tungstate solution in a 500ml beaker, add 1 times the theoretical amount of industrial ammonium sulfide and 1 times the theoretical amount of magnesium carbonate respectively, the solution pH=9.0, react at room temperature for 2 hours, filter the ammonium tungstate solution obtained The concentration is 0.10g / L, and the removal rate of phosphorus is 54.55%.

Embodiment 3

[0054] Take 300ml of ammonium tungstate solution in a 500ml beaker, add 1 times the theoretical amount of industrial ammonium sulfide, 1.1 times the theoretical amount of light magnesium oxide, the solution pH=9.0, react at room temperature for 2 hours, filter the obtained ammonium tungstate The concentration of phosphorus in the solution was 0.016g / L, and the removal rate of phosphorus was 92.73%.

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Abstract

The invention provides a method of purifying ammonium tungstate solution. The method comprises the following steps of contacting the ammonium tungstate solution and magnesium salt so as to remove phosphorus in a form of magnesium ammonium phosphate sediments. By utilizing the method, the phosphorus in the ammonium tungstate solution can be effectively removed.

Description

technical field [0001] The invention belongs to the field of wolframite smelting. More specifically, the present invention relates to a method for purifying ammonium tungstate solution. Background technique [0002] The current tungsten smelting process mainly adopts alkali decomposition → calcium salt phosphorus removal → anion exchange → ammonium tungstate solution vulcanization and impurity removal → evaporation and crystallization to produce APT process, in which Na 2 WO 4 The phosphorus concentration in the solution is 0.5-1g / l, and the phosphorus concentration in the ammonium tungstate solution obtained through calcium salt dephosphorization-anion exchange is still about 0.2g / l. [0003] Therefore, the current purification methods for ammonium tungstate solution still need to be improved. Contents of the invention [0004] The present invention aims to solve at least one of the above-mentioned technical problems. [0005] The present invention is accomplished bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/44C22B34/36
CPCY02P10/20
Inventor 万林生孙丽徐国钻李红超赵立夫
Owner CHONGYI ZHANGYUAN TUNGSTEN
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