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Method for recovering antimony, tin and lead from tin slag

A technology of tin slag and antimony tin, which is applied in the field of recycling antimony, tin and lead, can solve the problems of loss of tin and indium resources, increase of production cost, decrease of direct recovery rate, etc., and achieve good environmental benefits and reduce pollution

Inactive Publication Date: 2022-08-02
柳州华锡有色设计研究院有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before this, there has been no good way to comprehensively recover tin and indium from the slag, so the slag has to be piled up or returned to the blast furnace or reverberatory furnace for treatment, which reduces the direct yield of lead and antimony and increases the production cost, and at the same time loses tin, Indium resources

Method used

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  • Method for recovering antimony, tin and lead from tin slag
  • Method for recovering antimony, tin and lead from tin slag
  • Method for recovering antimony, tin and lead from tin slag

Examples

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Embodiment 1

[0035] An example of the method for step-by-step recovery of antimony, tin and lead from tin slag according to the present invention, comprises the steps:

[0036] 1. Potential control two-stage countercurrent reduction and leaching of antimony

[0037] The leaching conditions of antimony are:

[0038] (1) Tin slag slurrying

[0039] Tin slag particle size: 0.075~0.125mm, slurry agent: water, liquid-solid ratio: 0.5:1, slurry time: 0.5-2 hours;

[0040] (2) One stage of leaching

[0041] The first stage leaching conditions of the tin slag after slurrying are: leaching agent composition and concentration: the leaching solution is adjusted to a hydrochloric acid content of 200g / L, the amount of sodium chloride added is 1-20wt% of the tin slag, and the amount of hydrazine hydrate added is adjusted to the leaching potential It is 250~350mv, liquid-solid ratio: 4:1, reaction temperature: 80~90℃, reaction time: leaching at 80℃ for 1.5 hours, leaching at 90℃ for 1.5 hours, process...

Embodiment 2

[0052] Another example of the method for reclaiming antimony, tin and lead in steps from tin slag according to the present invention, comprises the steps:

[0053] 1. Potential control two-stage countercurrent reduction and leaching of antimony

[0054] The leaching conditions of antimony are:

[0055] (1) Tin slag slurrying

[0056] Tin slag particle size: 0.075-0.125mm, slurry agent: water, liquid-solid ratio: 0.5:1, slurrying time: 0.5-2 hours;

[0057] (2) One stage of leaching

[0058] The leaching conditions for the first stage of the tin slag after slurrying are: leaching agent composition and concentration: the leaching solution is adjusted to a hydrochloric acid content of 250g / L, the amount of sodium chloride added is 1-20wt% of the tin slag, and the amount of hydrazine hydrate added is adjusted to the leaching potential 250-350mv, liquid-solid ratio: 5:1, reaction temperature: 80-90°C, reaction time: leaching at 80°C for 1.5 hours, leaching at 90°C for 1.5 hours,...

Embodiment 3

[0069] Another example of the method for reclaiming antimony, tin and lead in steps from tin slag according to the present invention, comprises the steps:

[0070] 1. Potential control two-stage countercurrent reduction and leaching of antimony

[0071] The leaching conditions of antimony are:

[0072] (1) Tin slag slurrying

[0073] Tin slag particle size: 0.075-0.125mm, slurry agent: water, liquid-solid ratio: 0.5:1, slurrying time: 0.5-2 hours;

[0074] (2) One stage of leaching

[0075] The first stage leaching conditions of the tin slag after slurrying are: leaching agent composition and concentration: the leaching solution is adjusted to a hydrochloric acid content of 300g / L, the amount of sodium chloride added is 1-20wt% of the tin slag, and the amount of hydrazine hydrate added is adjusted to the leaching potential 250-350mv, liquid-solid ratio: 6:1, reaction temperature: 80-90°C, reaction time: leaching at 80°C for 1.5 hours, leaching at 90°C for 1.5 hours, process...

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PUM

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Abstract

The invention relates to a method for recovering antimony, tin and lead from tin slag, which comprises the following steps of: carrying out potential control two-stage countercurrent reduction on tin slag powder containing tin, antimony, lead, indium and arsenic oxides by using a mixed solution of hydrochloric acid, sodium chloride and hydrazine hydrate as a leaching solution to leach antimony, neutralizing and hydrolyzing a first-stage leaching solution to produce crude antimony white, and leaching lead from a second-stage leaching residue by using a sodium chloride solution, and cooling and crystallizing the liquid after lead immersion to obtain crude lead chloride, and washing the slag after lead immersion with sodium to obtain high-indium tin concentrate containing 49.52-55.69 wt% of tin and 1.04-1.2 wt% of indium. The purity of crude antimony white is 93.58 wt%, the purity of crude lead chloride is 99.67 wt%, the direct recovery rate of tin is 98.68 wt%, the direct recovery rate of antimony is 84.616 wt%, the direct recovery rate of lead is 95.136 wt%, and the direct recovery rate of indium is 95.3 wt%. The method has the advantages of being short in process, good in separation effect, good in working environment and the like.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for recovering antimony, tin and lead from tin slag. Background technique [0002] The crude alloy blowing process of the pyrometallurgical smelting process of brittle sulfur, lead and antimony ore produces a detinned blowing smelting slag called tin slag. The slag contains tin, antimony, lead, indium and arsenic as high as 10-15wt%, 20 ~40wt%, 10~30wt%, 0.1~0.3wt%, 1~3wt%. Before this, there has been no good way to comprehensively recover tin and indium from the slag, and the slag has to be stored or returned to the blast furnace or reverberatory furnace for treatment, which reduces the direct yield of lead and antimony, increases the production cost, and at the same time loses tin, Indium resources. SUMMARY OF THE INVENTION [0003] The object of the present invention is to provide a method for recovering antimony, tin, and lead from tin slag, which can rec...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B25/06C22B30/02C22B13/00C22B58/00C22B1/11
CPCC22B7/04C22B25/06C22B25/04C22B7/007C22B30/02C22B13/045C22B58/00C22B1/11Y02P10/20
Inventor 赵鹏吴伯增邓久帅魏宗武胡明振林成旭覃祚明农永萍覃伟明
Owner 柳州华锡有色设计研究院有限责任公司