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Comprehensive treatment method for high-arsenic lead zinc flue dust ash

A high-arsenic, lead-zinc, and comprehensive treatment technology, applied in the direction of improving process efficiency, can solve the problems of arsenic-containing wastes that are far apart, valuable metals are not fully utilized, and environmental pollution is not fundamentally eliminated, and achieve good results. Promote the application value, reduce the total amount of processing, and the effect of easy operation

Active Publication Date: 2017-03-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the solid arsenic-containing waste generated in the smelting process and the arsenic-containing sediment formed by waste acid are hoarded and stored, which has not fundamentally eliminated the pollution to the environment, and a large amount of valuable metals has not been fully utilized. The discharge status of arsenic-containing waste It is still far from the requirements of the environmental protection department. With the accumulation of arsenic waste, its effective treatment has become an urgent problem to be solved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A. Take 500 grams of high arsenic, lead and zinc soot, and add a sulfuric acid solution with a mass concentration of 8% in the reactor according to a liquid-solid mass ratio of 5:1 and increase the temperature to 60°C. Add under stirring conditions with a stirring speed of 300rpm High arsenic, lead and zinc fume ash, leaching dissociated fume ash for 1.0 hour, and then separating to obtain leaching residue and leaching liquid;

[0027] B. In the leaching solution of step A, according to the copper content in the leaching solution, add Na in the theoretical required amount of precipitated copper 2 S, react for 30 minutes at room temperature and stirring at a stirring speed of 400 to obtain CuS precipitation residue and precipitation liquid;

[0028] C. In the precipitated liquid separated in step B, according to the ratio of organic phase to water phase volume ratio of 1:1, add chloroform organic phase containing 0.6 mol / L of diantipyrine to extract zinc, and the extraction te...

Embodiment 2

[0035] A. Take 500 grams of high arsenic, lead and zinc soot, and add a 5% sulfuric acid solution with a mass concentration of 5% to the reactor at a liquid-to-solid mass ratio of 8:1 and add it under stirring conditions at a stirring speed of 500rpm. High arsenic, lead and zinc fume ash, leaching dissociated fume ash for 2.0 hours, and then separated to obtain leaching residue and leaching liquid;

[0036] B. In the leaching solution of step A, according to the copper content in the leaching solution, add Na in the theoretical required amount of precipitated copper 2 S, react for 30 minutes at room temperature and stirring at a stirring speed of 200 to obtain CuS precipitation residue and precipitation liquid;

[0037] C. In the precipitated liquid separated in step B, according to the volume ratio of the organic phase to the water phase at a ratio of 1:1, add the chloroform organic phase containing 0.4mol / L of diantipyrine to extract zinc, and the extraction temperature Room temp...

Embodiment 3

[0044] A. Take 500 grams of high arsenic, lead and zinc soot, and add a sulfuric acid solution with a mass concentration of 7% to the reactor according to a liquid-solid mass ratio of 6:1, and heat to 70°C, and add it under stirring conditions at a stirring speed of 400rpm Soot, leaching dissociated soot for 1.5 hours, and then separating to obtain leaching residue and leachate;

[0045] B. In the leaching solution of step A, according to the copper content in the leaching solution, add Na in the theoretical required amount of precipitated copper 2 S, react for 30 minutes at room temperature and stirring at a stirring speed of 300 to obtain CuS precipitate and precipitated liquid;

[0046] C. In the precipitated liquid obtained by the separation in step B, add the organic phase of chloroform containing 0.5 mol / L of diantipyrine to extract zinc according to the volume ratio of the organic phase to the water phase at a ratio of 1:1. At room temperature, the stirring speed is 400 rpm,...

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Abstract

The invention discloses a comprehensive treatment method for high-arsenic lead zinc flue dust ash. According to the method, high-arsenic lead zinc flue dust ash is leached with a dilute sulfuric acid solution, the zinc and the arsenic in the residue are separated to obtain lead-rich residue, the leaching liquid is subjected to copper precipitation with sodium sulfide, the valuable element zinc is extracted and separated with an organic phase, CaO is added to make the arsenic in the solution generate calcium arsenate so as to be precipitated and removed, the extraction organic phase is subjected to back extraction with an acetate solution, the back extraction liquid is precipitated with ammonium carbonate, and separation, washing, drying and calcination are performed to obtain the active zinc oxide product. According to the present invention, the comprehensive treatment method has characteristics of simple process, simple equipment, easy and safe operation, secondary resource comprehensive utilization, circular economy achieving, energy saving, emission reducing, and good promotion and application value, and is the effective resource utilization process technology route for producing the high added value chemical industry product by using the industrial waste.

Description

Technical field [0001] The invention belongs to the field of solid waste utilization in the metallurgical industry, and specifically relates to a method for recycling valuable metals in high-arsenic lead-zinc smoke dust obtained by dust collection during a copper smelting process. Background technique [0002] In the metallurgical industry's pyrotechnic processing of solid materials, a certain amount of smoke and dust is often carried along with the flue gas. According to environmental protection requirements, the flue gas must be purified to obtain solid materials (dust collection ash). The main components and materials of the dust collection ash closely related. [0003] Smelting is the most important smelting process for pyrometallurgical copper smelting. The high-arsenic, lead, and zinc fume dust is the dusty fume generated in the copper smelting process and collected by the electric precipitator. Because it contains more harmful impurities, It is not suitable to return to the...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B13/00C22B19/30C22B19/20C22B15/00C22B30/04
CPCC22B7/007C22B7/02C22B13/045C22B15/0071C22B15/0089C22B19/22C22B19/30C22B30/04Y02P10/20
Inventor 李国斌郑峰伟孙成苏毅夏举佩罗康碧李沪萍胡亮梅毅
Owner KUNMING UNIV OF SCI & TECH
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