Method for comprehensively recovering valuable metals through oxygen pressure treatment of tin anode mud

A technology of tin anode slime and valuable metals, applied in the field of hydrometallurgy, can solve the problems of high pollution, low recovery rate of valuable metals, low energy consumption, etc., and achieve the effect of complete separation

Active Publication Date: 2016-07-06
CENT SOUTH UNIV
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Problems solved by technology

[0007] Aiming at the shortcomings of high energy consumption, high pollution, and low recovery rate of valuable metals existing in the existing tin anode slime treatment technology, the purpose of the present invention is to provide a kind of tin anode slime as raw material, through oxygen pressure alkali leaching, sulfuric acid oxidation leaching , chloride leaching and other pro

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  • Method for comprehensively recovering valuable metals through oxygen pressure treatment of tin anode mud

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Embodiment 1

[0056] 100Kg of tin anode slime that has been stored for more than 10 days and crushed to less than 0.4mm after drying (the specific components are Sn: 46.77%, Pb: 5.64%, Cu: 3.3%, Ag: 0.119%, As: 10.13%, Sb: 15.08%, Bi: 5.09%, In: 0.21%) added to 1.0m 3 In the high-pressure reactor, control the concentration of sodium hydroxide at 3mol / L, temperature at 200°C, oxygen partial pressure at 1.5MPa, liquid-solid ratio at 8:1, reaction time at 4h, and stirring speed at 500rpm during leaching. After the reaction, cool the slurry to 70°C, open the autoclave safely after the pressure is released, and separate the liquid and solid while it is hot, wash the filter residue with hot water for 2 to 3 times, and obtain a leaching solution with a tin content of 4.14 and arsenic content of 0.46 The leaching rates of slag, tin and arsenic can reach 95.91% and 97.90% respectively, and the leaching rates of other valuable metals are very low or not leached. The leaching solution is evaporated a...

Embodiment 2

[0062] 100Kg of tin anode slime that has been stored for more than 10 days and crushed to less than 0.4mm after drying (the specific components are Sn: 37.94%, Pb: 5.92%, Cu: 3.9%, Ag: 0.15%, As: 7.25%, Sb: 15.73%, Bi: 4.8%, In: 0.34%) added to 1.0m 3 In the high-pressure reactor, the concentration of sodium hydroxide is controlled at 2.5mol / L during leaching, the temperature is 200°C, the oxygen partial pressure is 1.5MPa, the liquid-solid ratio is 7:1, the reaction time is 4h, and the stirring speed is 500rpm. After the reaction is over, cool the slurry to 70°C, open the autoclave safely after the pressure is released, and separate the liquid and solid while it is hot, wash the filter residue with hot water for 2 to 3 times, and obtain a leaching solution with a tin content of 5.23 and an arsenic content of 0.317 The leaching rates of slag, tin and arsenic can reach 94.21% and 98.98% respectively, a small amount of copper is leached, and other valuable metals are hardly leac...

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Abstract

The invention discloses a method for comprehensively recovering valuable metals through oxygen pressure treatment of tin anode mud. According to the method, the tin anode mud serves as a raw material, oxygen pressure alkaline leaching, sulfuric acid oxidation leaching, chlorination leaching, separation technology and other wet metallurgy methods are adopted, effective separation and recovery of valuable metals such as tin, arsenic, antimony, copper, bismuth, indium and the like in the tin anode mud can be realized, lead and precious metals are enriched in slag, and subsequent fire process recovery is facilitated. According to the method, arsenic is efficiently removed from the source, the arsenic removal rate is over 95 percent, the precious metals are hardly lost in the wet smelting process, comprehensive recovery and utilization of the valuable metals can be realized, the method has the characteristics such as high raw material adaptability, simplicity in operation, high efficiency in cleaning, low energy consumption, less pollution, high metal recovery rate and the like, and the industrial production requirements are met.

Description

technical field [0001] The invention relates to a method for comprehensively recovering valuable metals from tin anode slime by oxygen pressure treatment, in particular to the realization of arsenic and arsenic in tin anode slime through oxygen pressure alkali leaching, sulfuric acid oxidation leaching and chlorination leaching by using tin anode slime as a raw material. The stepwise separation and recovery of various valuable metals and the enrichment of lead and precious metals belong to the technical field of hydrometallurgy. Background technique [0002] Tin anode slime is the refining slag produced by the anode during the electrolytic refining process of crude tin or solder. It mainly contains tin, arsenic, antimony, bismuth, copper, lead, silver, indium and other metals, and has a high value of metal recovery. [0003] The existing treatment methods of coarse tin electrolytic anode slime mainly include the following types. [0004] One: oxidation roasting - acid leach...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B25/06C22B61/00C22B30/02C22B30/06C22B15/00C22B58/00C22B11/00C22B13/00
CPCC22B7/007C22B7/008C22B11/021C22B13/025C22B15/0071C22B25/06C22B30/02C22B30/06C22B58/00C22B61/00Y02P10/20
Inventor 刘维焦芬覃文庆蔡练兵梁超
Owner CENT SOUTH UNIV
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