Centrifugal extracting method for preparing ammonium tungstate solution from soda leach liquor of tungsten contained material

A technology of leaching solution and ammonium tungstate, applied in tungsten compounds, chemical instruments and methods, inorganic chemistry, etc., to achieve the effect of reducing wastewater discharge

Active Publication Date: 2009-06-03
CENT SOUTH UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the acidic extraction method and the Russian alkaline extraction method, and provide a method for preparing ammonium tungstate solution by centrifugal extraction from the tungsten-containing material soda leaching solution. The method has a short process flow and consumes chemical reagents. Small, good for environmental protection

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  • Centrifugal extracting method for preparing ammonium tungstate solution from soda leach liquor of tungsten contained material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Composition of tungsten-containing material soda leachate: WO 3 10.0g / L, Na 2 CO 3 20.5g / L, P 0.02g / L, As 0.01g / L, Si0.03g / L;

[0030] Organic phase: pre-prepared organic phase composed of 60% N263+20% 2-octanol+20% sulfonated kerosene (volume percentage concentration), wherein N263 is the product code of domestic quaternary ammonium salt extractant, which is a kind of methyl trimethyl Alkyl ammonium chloride, wherein the carbon atoms in the three alkyl groups are 8-10. Before extraction, the organic phase is contacted with sodium carbonate solution several times to convert the methyltrialkylammonium chloride in the organic phase into the carbonate of methyltrialkylammonium, and the extractant is in the organic phase The volume percentage concentration is 60%, and this organic phase is used as the organic phase of extraction.

[0031]Operation: The above-mentioned organic phase and tungsten-containing material soda leachate are subjected to 7-stage countercurrent ...

Embodiment 2

[0034] Composition of tungsten-containing material soda leachate: WO 3 150.0g / L, Na 2 CO 3 80.3g / L, P 0.020g / L, As 0.011g / L, Si 0.032g / L.

[0035] Organic phase: an organic phase whose composition is 10% methyl trinonyl ammonium chloride + 10% sec-octanol + 80% sulfonated kerosene (volume percentage concentration) is prepared in advance. Before extraction, the organic phase is contacted with sodium carbonate solution several times to convert the methyltrinonylammonium chloride in the organic phase into the carbonate of methyltrialkylammonium, and the extractant is in the organic phase The volume percentage concentration is 10%, and this organic phase is used as the organic phase of extraction.

[0036] Operation: The above-mentioned organic phase and tungsten-containing material soda leachate are subjected to 15-stage countercurrent extraction under the condition of a flow ratio of 10 / 1. The extraction equipment is an annular centrifugal extractor, and the negative tungst...

Embodiment 3

[0039] Composition of tungsten-containing material soda leachate: WO 3 100.2g / L, Na 2 CO 3 90.5g / L, P 0.13g / L, As 0.04g / L, Si 0.24g / L.

[0040] Organic phase: an organic phase whose composition is 60% methyl trioctyl ammonium chloride + 20% sec-octanol + 20% sulfonated kerosene (volume percentage concentration) is prepared in advance. Before the extraction, the organic phase is contacted with sodium carbonate solution several times to convert the methyl trioctyl ammonium chloride in the organic phase into the carbonate of methyl trialkyl ammonium, and the extractant is in the organic phase The volume percent concentration is 60%, and this organic phase is used as the organic phase of extraction.

[0041] Operation: The above organic phase and tungsten-containing material soda leachate are subjected to three-stage countercurrent extraction under the condition of a flow ratio of 1.5 / 1. The extraction equipment is an annular centrifugal extractor, and the negative tungsten o...

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Abstract

The invention discloses a centrifugal extracting method for preparing ammonium tungstate solution from soda leach liquor of tungsten contained material. The method takes the trialkyl methyl ammonium carbonate as extractant containing tungsten materials directly from the leaching solution of soda extraction tungsten; then the impurities of phosphorus, arsenic, silicon, such as stripping more than stay in solution with separation of tungsten, tungsten negative organic phase after washing with detergent as ammonium bicarbonate and ammonium carbonate extraction of the mixed solution to obtain high-purity tungsten perchlorate solution, anti-organic phase after extraction with sodium hydroxide solution using renewable, recycled back to the organic phase after extraction, extraction, extraction operations are carried out the centrifugal extractor. The invention achieves the invention sodium perchlorate solution to the transformation of tungsten, and the invention removes the phosphorus, arsenic, silicon and other impurities, stripping more than the use of liquid can be returned to leaching. The extraction and anti-extraction process of the invention has a fastseparation, short process, and small chemical reagent consumption, waste water emissions from small, easy to achieve industrialization.

Description

technical field [0001] The invention relates to a tungsten hydrometallurgical method, in particular to a method for preparing ammonium tungstate solution by centrifugal extraction from tungsten-containing material soda leaching solution. Background technique [0002] Tungsten is an important rare metal element and has a wide range of uses in industry. Industrially, tungsten is extracted from various tungsten-containing materials, including tungsten mineral resources (such as scheelite, wolframite, black and white tungsten mixed ore, etc.), secondary resources of tungsten (such as waste tungsten-containing catalysts, etc.) And various intermediate materials in the production process of tungsten industry. [0003] Soda high-pressure leaching method and soda sintering-water leaching method are two mature methods for leaching tungsten from tungsten-containing materials in industry. The leaching solution obtained by the above two leaching methods is a mixed solution of sodium t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G41/00
Inventor 张贵清张启修张斌肖连生张宏伟关文娟
Owner CENT SOUTH UNIV
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