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Method for treating electrolytic anode slime of soldering tin

A technology of anode slime and solder, applied in the field of tin anode slime, can solve problems such as tin smelting system hazards and achieve effective separation

Inactive Publication Date: 2020-05-22
TONGREN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The anode slime of solder electrolysis contains tin, antimony, bismuth, silver, etc. Due to the high content of antimony and bismuth and no suitable treatment process, if the tin materials with high content of antimony and bismuth are returned to the tin smelting system, it will cause harm to the tin smelting system

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  • Method for treating electrolytic anode slime of soldering tin

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Embodiment Construction

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0018] refer to figure 1 , a method for processing solder electrolytic anode slime, comprising the steps of:

[0019] S1. Roasting and defluorination: Roasting the solder electrolysis anode slime in the air for 2-3 hours, the roasting temperature is controlled at 500-600°C, and the roasting slag and fluorine-containing flue gas are obtained;

[0020] S2. Vacuum reduction smelting: the roasted slag obtained in step S1 is placed in a vacuum furnace, and after filling the reduced coal into the vacuum furnace, vacuum reduction smelting is carried out. During the vacuum reduction smelting process, the temperature in the vacuum furnace is 900 ~ 1100°C, the vacuum degree i...

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Abstract

The invention discloses a method for treating electrolytic anode slime of soldering tin. The method comprises the following steps: roasting and defluorinating, specifically, the electrolytic anode slime of the soldering tin is roasted in air to obtain roasting slag and fluorine-containing flue gas; vacuum reduction smelting, specifically, the obtained roasting slag is put into a vacuum furnace, after reducing coal is filled into the vacuum furnace, vacuum reduction smelting is performed, and reducing slag and an alloy are obtained after the vacuum reduction smelting is finished; and vacuum distillation and condensation, specifically, the obtained alloy is subjected to vacuum distillation in a vacuum furnace, antimony and bismuth in the alloy in the vacuum furnace are volatilized to generate volatilized gas, the volatilized gas is introduced into a condensation pipe to be condensed and collected to obtain a bismuth-antimony material, after antimony and bismuth in the alloy are volatilized, the alloy is changed into a tin-rich alloy, and effective separation of antimony, bismuth and tin in the electrolytic anode slime of the soldering tin is realized. According to the method, the effective separation of antimony, bismuth and tin in the electrolytic anode slime of the soldering tin can be realized in the process, the whole process is clean and environmentally friendly, and popularization and application are facilitated.

Description

technical field [0001] The invention relates to the technical field of tin anode slime, in particular to a method for treating solder electrolytic anode slime. Background technique [0002] Tin anode slime can be divided into coarse tin electrolytic anode slime and solder electrolytic anode slime. The coarse tin electrolytic anode slime is mainly treated by oxidation roasting method and reduction smelting-electrolysis method. Solder electrolytic anode slime is mainly treated by wet acid leaching, and wet acid leaching is mainly direct acid leaching and oxidative acid leaching. Direct acid leaching is to immerse tin into the solution by acid leaching, and the solution uses displacement or precipitation to separate tin. The anode slime of solder electrolysis contains tin, antimony, bismuth, silver, etc. Due to the high content of antimony and bismuth and no suitable treatment process, if the tin materials with high content of antimony and bismuth are returned to the tin smelt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B5/10C22B1/02C22B9/02C22B25/02C22B25/06C22B30/02C22B30/06C22B11/02
CPCC22B1/02C22B5/10C22B7/001C22B9/02C22B11/021C22B25/02C22B25/06C22B30/02C22B30/06Y02P10/20
Inventor 李学鹏王娟
Owner TONGREN UNIV