A kind of stripping germanium method from germanium-containing fluorosilicate solution

A fluosilicic acid and extraction technology, applied in the field of hydrometallurgy, can solve the problems of poor organic phase regeneration ability, large amount of washing liquid, and large amount of wastewater, and achieve the effects of improving regeneration ability, reducing production cost, and reducing loss rate
CN104789801BInactive Publication Date: 2017-06-16GUIZHOU HONGDA ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUIZHOU HONGDA ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD
Publication Date
2017-06-16
Estimated Expiration
Not applicable · inactive patent
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Abstract

The invention relates to the technical field of hydrometallurgy, in particular to a method for back extraction of germanium from a germanium-contained fluosilicic acid solution. The germanium-contained fluosilicic acid solution is extracted with an N235-kerosene system serving as an organic phase, a sodium hydroxide solution containing ammonium ions is adopted for treating the organic phase, sulfuric acid is added to a back extraction solution to adjust the PH value, then, germanium hydrolysis treatment is performed, obtained precipitate is calcined, germanium is obtained, and the quality of germanium concentrate is further improved, so that in the germanium concentrate, the content of germanium is larger than or equal to 7%, the content of F is smaller than 0.5%, and the content of Si is smaller than 4%; the extraction rate of germanium in germanium-contained fluosilicic acid is increased, and the extraction cost of germanium in the germanium-contained fluosilicic acid solution is reduced.
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Description

technical field

[0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for stripping germanium from a germanium-containing fluorosilicate solution. Background technique

[0002] The raw material containing germanium and high silicon is treated by acid leaching with fluoride, and then produced by tannin precipitation method, which has high production cost and low yield. Therefore, some researchers applied N to the germanium-containing fluorosilicate solution obtained after the germanium-containing high-silicon raw material was treated with fluoride acidic leaching. 235 Ge was extracted under the condition of adding Ge complexing agent, and NaOH solution was used for alkaline stripping. The extraction rate of Ge in this process is all above 90%, but its stripping is not complete, and the purity of stripped germanium is low, and then causes, N 235 The regeneration of the organic phase is not good, and the extraction rate is getting l...

Claims

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