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Method for separating tin and stibium from tin-lead anode slime

A technology of anode slime and tin-lead, which is applied in the field of antimony and tin separation, can solve problems such as poor operating environment, high acid consumption, and large acid mist, and achieve the effects of high added value, production cost saving, and environmental protection.

Inactive Publication Date: 2009-08-26
CHENZHOU YUTENG CHEM IND
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  • Application Information

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Problems solved by technology

It solves the separation problem of tin, antimony and copper well; however, a large amount of hydrochloric acid is used, the acid consumption is large, the acid mist is large, and the operating environment is poor

Method used

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  • Method for separating tin and stibium from tin-lead anode slime

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Embodiment Construction

[0008] The attached drawing shows a method for separating tin and antimony from tin-lead anode slime. First, tin-lead anode slime is oxidized and acid-leached with hydrochloric acid and sodium chloride to make most of tin, antimony, bismuth, copper, etc. Into the acid leaching solution, it is separated from lead, silver, etc., and then tin in the acid leaching solution is selectively precipitated in the form of ammonium chlorostannate with ammonium chloride, so as to realize the separation of tin from antimony, bismuth, and copper; The filtrate is copper-immersed with sodium sulfide, and the copper-immersed liquid is hydrolyzed to obtain crude antimony oxychloride. The separation of tin and antimony is completed, and the hydrolyzed liquid is discharged after treatment. The specific process conditions are as follows:

[0009] 1. Oxidative acid leaching

[0010] Use hydrochloric acid and sodium chloride to leach the tin-lead anode slime material. Most of the main components of the m...

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Abstract

The invention relates to a method for separating tin and stibium from tin-lead anode slime. The method comprises the following steps: firstly performing oxidizing leaching on the tin-lead anode slime with hydrochloric acid and sodium chloride to cause most the tin, the stibium, bismuth and copper and the like to enter leaching solution and separate from the lead and the silver, then selectively precipitating the tin in the leaching solution in the form of ammonium chlorostannate by ammonium chloride to realize separation of the tin from the stibium, the bismuth and the copper; then depositing copper in filtrate by sodium sulfide, then hydrolyzing the solution after copper deposition to obtain crude antimony oxychloride, and finishing separation of the tin and the stibium. Compared with the prior art, the method helps reduce hydrochloric acid consumption by over 40% and reduce about half of the production cost.

Description

Technical field [0001] The present invention relates to a method for recovering and separating these metals from anode slime containing lead, gold, silver, tin, antimony, bismuth and copper, in particular to a method for separating tin and antimony from anode slime containing tin and lead Background technique [0002] As we all know, the high content of valuable metals in tin-lead anode mud is of great value for recycling. From the literature that has been mastered, almost all the impurities in crude lead are concentrated in electrolytic tin-lead anode slime; the content of tin, antimony, and copper is relatively high, and the phases of antimony and copper are mainly metal antimony and metal copper In addition, the anode mud contains high silver, bismuth, and arsenic, and the composition is more complex. It is a silver-containing polymetallic material; the metals contained in it are similar in nature, and can only form lead-tin and lead-antimony, which are difficult to separate. ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B25/06C22B30/02
CPCY02P10/20
Inventor 谢志刚蔡练兵朱明刘维刘劲夫肖定荣杨建军曹勇
Owner CHENZHOU YUTENG CHEM IND
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