Comprehensive recovery method for oxygen pressure alkaline leaching calcium salt tin precipitation of tin-containing material

Abstract

The invention discloses a comprehensive recovery method for oxygen pressure alkaline leaching calcium salt tin precipitation of a tin-containing material. The method is characterized by comprising thefollowing steps of: 1, crushing the tin-containing material to obtain a crushed material; 2, adding bottom water, the crushed material and caustic soda flakes into a slurrying kettle to form a leachate, and performing a reaction for 1 hour to obtain a reaction material; 3, adding the reaction material in the slurrying kettle into an autoclave for reaction; 4, carrying out filter pressing to obtain a filtrate and filter residues; 5, after rinsing the filter residues, leaching and extracting indium in the filter residues by using an acid method; 6, adding hydrogen peroxide into the filtrate tooxidize and remove antimony; and 7, making antimony-containing slag into antimony white to recover antimony; and adding lime into the tin-containing filtrate, and carrying out filter pressing to obtain calcium stannate filter residues and alkaline filtrate. According to the method, the comprehensive recovery rate and the comprehensive recovery benefit of the tin-containing material are improved, so that valuable metals in the tin-containing material are productized, the product income is increased, and the environmental pollution is reduced.

Description

technical field [0001] The invention belongs to the field of machinery, and in particular relates to a comprehensive recovery method for tin-precipitation by oxygen pressure alkali leaching, calcium salt and tin-precipitation. Background technique [0002] At present, the comprehensive recovery of tin-containing materials, especially tin anodes, is not ideal in our country. The main method is to use atmospheric pressure acid leaching, the leaching rate is not high, and various valuable metals have not been completely separated, making it commercialized and non-toxic. Harmful, so the comprehensive recycling efficiency and benefits are not ideal. [0003] Specifically, at present, tin-containing materials, especially tin anode slime, are generally leached by acid method in China. Because 4-valent tin and 5-valent antimony are insoluble in acid, the leaching rate is not high. Moreover, during acid leaching, all soluble materials will be immersed in the solution, and it is time...

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Problems solved by technology

[0002] At present, the comprehensive recovery of tin-containing materials, especially tin anodes, is not ideal in our country. The main method is to use atmospheric pressure acid leaching, the leaching rate is not high, and various valuable metals have not been completely separated, making it commercialized and non-toxic. Harmful, so the overall recovery efficiency and benefits are not ideal

[0003] Specifically, at present, tin-containing materials, especially tin anode slime, are generally leached by acid method in China. Because 4-valent tin and 5-valent antimony are insoluble in acid, the leaching rate is not high

In addition, during acid leaching, all kinds of soluble metals will be immersed in the solution, and it is time-consuming and cost-intensive to separate various valuable metals.

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