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Method for removing vanadium from tungstate solution

A technology of tungstate and solution, applied in the field of metallurgy, can solve the problems of large consumption and increased cost

Inactive Publication Date: 2011-01-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above methods for separating vanadium are all carried out under the condition of low pH value, and the alkali content of the general tungsten leaching solution is relatively high, so a large amount of acid must be consumed in order to achieve the separation conditions, which increases the cost of process operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Na 2 WO 4 Solution 100mL, including: WO 3 : 20g / L, V 2 o 5 : 1.998g / L. According to molar ratio Fe:V=6, to Na 2 WO 4 FeCl was added to the solution 3 solution, and 2ml of 2.2mol / L NaOH solution was added to adjust the pH value of the solution to 8, and filtered after stirring for 30 minutes; the vanadium removal rate was 95.04% and the tungsten loss rate was 5.18%.

Embodiment 2

[0026] (NH 4 ) 2 WO 4 Solution 100mL, including: WO 3 : 75.94g / L, V 2 o 5 : 1.0651g / L. According to the molar ratio Fe: V = 8, to (NH 4 ) 2 WO 4 Fe(NO 3 ) 3 solution, and add 20ml of ammonia water to adjust the pH value of the solution to 9.52, and filter after stirring for 60 minutes; the vanadium removal rate is 95.84%, and the tungsten loss rate is 5.11%.

Embodiment 3

[0028] Na 2 WO 4 Solution 100mL, including: WO 3 : 100.85g / L, V 2 o 5 : 0.1151g / L. According to the molar ratio Fe: V = 13.83, toward Na 2 WO 4 Fe was added to the solution 2 (SO 4 ) 3 solution, and add 1.5ml of 2.2mol / L NaOH solution to adjust the pH value of the solution to 11.59, and filter after stirring for 100 minutes; it is detected that the vanadium removal rate is 95.24%, and the tungsten loss rate is 0.67%.

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Abstract

The invention relates to the field of metallurgy, in particular to tungstenic hydrometallurgy. The invention provides a method for removing vanadium from tungstate solution, characterized in that ferric hydroxide is used for adjusting the pH value of the solution to 8-12, and vanadium is removed from the tungstate solution containing vanadium by means of adsorption or combination of adsorption and precipitation. The vanadium removal rate reaches to over 90 percent. The method has the advantages of no introduction of harmful ions, simple and convenient operation, fast vanadium removal and low cost.

Description

technical field [0001] The invention relates to the field of metallurgy, and relates to a method for removing vanadium from tungstate solution in tungsten hydrometallurgy. Background technique [0002] The removal of impurities during tungsten smelting plays a vital role in improving the quality of tungsten products. As an element with similar chemical properties to tungsten, vanadium is easily associated with tungsten ore, and it is difficult to completely separate tungsten and vanadium. In recent years, the reduction of high-grade high-quality tungsten ore raw materials and the increase of low-grade ore with high impurity content and refractory ore have made the problem of separating impurity elements from tungstate increasingly important, and the separation of vanadium as an impurity element has also become is particularly important. [0003] At present, there are relatively few reports on the separation of vanadium from tungstate at home and abroad, and the main method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/46C22B3/24C22B34/36
CPCY02P10/20
Inventor 赵中伟肖露萍霍广生陈爱良李洪桂
Owner CENT SOUTH UNIV
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