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Method for processing arsenic-antimony fume by using replacement-reduction method so as to recover arsenic and antimony

A technology of arsenic recovery and reduction method, applied in the direction of improving process efficiency, can solve problems such as hindering process development, and achieve the effects of simple and easy operation, low economic cost and effective recovery

Active Publication Date: 2014-02-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Alkaline separation of arsenic and antimony Due to the toxicity of arsenic, the treatment or return of its leaching solution is a major problem in the actual production process, which hinders the further development of this process

Method used

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  • Method for processing arsenic-antimony fume by using replacement-reduction method so as to recover arsenic and antimony
  • Method for processing arsenic-antimony fume by using replacement-reduction method so as to recover arsenic and antimony

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] like figure 1 Shown, this replacement-reduction process handles the method for reclaiming arsenic and antimony from arsenic and antimony dust, and its concrete steps are as follows:

[0022] (1) Recovering arsenic by replacement method: the mass ratio of arsenic and antimony fume to arsenic and antimony dust (arsenic and antimony dust includes the following mass percentage components: arsenic content is 5%, antimony content is 30%) and antimony powder is 3: 1 Add antimony powder, and then replace and react at a temperature of 500°C for 30 minutes. During this process, the volatilized dust of antimony trioxide is collected. After the reaction is completed, crude arsenic will be obtained. The antimony powder has a purity of 95% and a particle size of 40 For this purpose, antimony trioxide volatilized dust is collected by bag dust collection;

[0023] (2) Recovery of antimony by reduction method: add reducing agent to the volatile dust of antimony trioxide collected in st...

Embodiment 2

[0026] like figure 1 Shown, this replacement-reduction process handles the method for reclaiming arsenic and antimony from arsenic and antimony dust, and its concrete steps are as follows:

[0027] (1) Recover arsenic by replacement method: add arsenic and antimony fume to arsenic and antimony dust (arsenic and antimony fume includes the following components in mass percentage: arsenic content is 20%, antimony content is 60%) according to the mass ratio of arsenic and antimony fume to antimony powder is 10: 1. Add antimony powder, and then replace and react at 800°C for 120 minutes. During this process, collect the volatilized dust of antimony trioxide. After the reaction is completed, crude arsenic will be obtained. The purity of antimony powder is 99%, and the particle size is 100 For this purpose, antimony trioxide volatilized dust is collected by bag dust collection;

[0028] (2) Recovery of antimony by reduction method: add reducing agent to the volatile dust of antimony...

Embodiment 3

[0031] like figure 1 Shown, this replacement-reduction process handles the method for reclaiming arsenic and antimony from arsenic and antimony dust, and its concrete steps are as follows:

[0032] (1) Recovering arsenic by replacement method: the mass ratio of arsenic and antimony fume to arsenic and antimony dust (arsenic and antimony dust includes the following mass percentage components: arsenic content is 15%, antimony content is 45%) and antimony powder is 9: 1. Add antimony powder, and then replace and react at 600°C for 90 minutes. During this process, the purity of the antimony powder is 97%, and the particle size is 80 mesh. Collect the volatile dust of antimony trioxide. After the reaction is completed, crude arsenic will be obtained , in which the volatile fumes of antimony trioxide are collected by bag dust collection;

[0033] (2) Recovery of antimony by reduction method: add reducing agent to the volatile dust of antimony trioxide collected in step (1) accordin...

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Abstract

The invention relates to a method for processing arsenic-antimony fume by using a replacement-reduction method so as to recover arsenic and antimony, belonging to the field of non-ferrous metallurgy technologies. The method comprises the steps of recovering arsenic by using a replacement method firstly: adding antimony powder into arsenic-antimony fume, and then simultaneously carrying out a displacement reaction on the obtained mixture for 30-120 min at the temperature of 500-800 DEG C and collecting antimony trioxide volatile fume, so that after the reaction is completed, crude arsenic is obtained; recovering antimony by using a reduction method: adding a reducing agent into the antimony trioxide volatile fume obtained in the last step, and then carrying out a reduction reaction on the obtained mixture for 30-180 min at the temperature of 800-1000 DEG C, so that crude antimony is obtained finally, wherein the mass ratio of antimony trioxide to the reducing agent is 10:(1-3). According to the invention, by fully using the characteristic that antimony trioxide is easily volatile at low temperature, arsenic in arsenic-antimony fume is replaced with antimony powder, and antimony trioxide is volatilized, so that crude arsenic is obtained, and then antimony trioxide is subjected to reduction smelting so as to obtain crude antimony, therefore, the method disclosed by the invention is simple in process and has better industrial application prospects.

Description

technical field [0001] The invention relates to a method for recovering arsenic and antimony from arsenic and antimony dust by a replacement-reduction method, and belongs to the technical field of nonferrous metallurgy. Background technique [0002] In the process of heavy metal smelting and recovery of precious metals, the dust produced has a high content of arsenic and antimony, which has a good industrial recovery value. In order to comprehensively utilize valuable metals and reduce environmental pollution, it is of great significance to increase the research on the separation technology of arsenic and antimony. [0003] At present, there are two methods for the separation of arsenic and antimony: fire method and wet method. In fire separation, the most commonly used method is vacuum distillation, which separates arsenic and antimony by using its different boiling point properties. Although this method can efficiently separate arsenic and antimony, it has high technical ...

Claims

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Application Information

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IPC IPC(8): C22B30/02C22B30/04C22B7/02
CPCY02P10/20
Inventor 李磊廖彬王华邱在军
Owner KUNMING UNIV OF SCI & TECH
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