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Method for recovering metal from copper-smelting electrostatic precipitation ash and application

A technology for electric dust collection and soot, applied in the directions of alkali metal compounds, alkali metal carbonates, chemical instruments and methods, etc., can solve the problems of low recovery rate, poor environmental conditions, pollution, etc., and achieve low impurity content and good benefits. , the effect of less environmental pollution

Inactive Publication Date: 2018-05-18
GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, due to the different sources of copper raw materials in various companies, the composition of raw materials is very different, the copper smelting process is different, and the control technology is different, resulting in complex components of copper soot and large fluctuations in phase composition, it is difficult to have a unified treatment method, and conventional wet methods Or fire treatment technology is difficult to eliminate arsenic, which increases the difficulty of subsequent recycling, and there are generally low recovery rates, poor environmental conditions and pollution problems

Method used

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  • Method for recovering metal from copper-smelting electrostatic precipitation ash and application
  • Method for recovering metal from copper-smelting electrostatic precipitation ash and application

Examples

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Effect test

Embodiment 1

[0034] This embodiment provides a method for recovering metals from copper smelting electric dust collection soot, which mainly includes:

[0035] Mix copper smelting electric dust collection soot and sodium carbonate at a mass ratio of 1:1.2, and roast at a temperature of 650°C for 2 hours to obtain a roasted product.

[0036] The roasted product was pulverized and ground to 80 mesh. The roasted product was mixed with water at a solid-to-liquid ratio of 1g:5mL, reacted at a temperature of 80°C for 2 hours, and the stirring intensity was 250rpm, and filtered to separate the solid and liquid to obtain arsenic-removed slag and arsenic-removed liquid.

[0037] Use a vacuum rotary evaporator to evaporate and concentrate the arsenic-removing liquid, crystallize for the first time under the conditions of a temperature of 95°C and a vacuum of 0.05 MPa, and evaporate until the remaining volume is 30% of the initial volume. The crystallized liquid was placed in a water bath at 75° C. ...

Embodiment 2

[0044] This embodiment provides a method for recovering metals from copper smelting electric dust collection soot, which mainly includes:

[0045] Mix copper smelting electric dust collection soot and sodium carbonate at a mass ratio of 1:1.4, and roast at a temperature of 600°C for 2 hours to obtain a roasted product.

[0046] The roasted product was pulverized and ground to 90 mesh. The roasted product was mixed with water at a solid-to-liquid ratio of 1g:5mL, reacted at a temperature of 90°C for 2 hours, and the stirring intensity was 250rpm, and filtered to separate the solid and liquid to obtain arsenic-removing slag and arsenic-removing liquid.

[0047] Use a vacuum rotary evaporator to evaporate and concentrate the arsenic-removing liquid, crystallize for the first time under the conditions of a temperature of 95°C and a vacuum of 0.05 MPa, and evaporate until the remaining volume is 30% of the initial volume. The crystallized liquid was placed in a water bath at 75° C...

Embodiment 3

[0054] This embodiment provides a method for recovering metals from copper smelting electric dust collection soot, which mainly includes:

[0055] Mix copper smelting electric dust collection soot and sodium carbonate at a mass ratio of 1:0.8, and roast at a temperature of 650°C for reaction 3 to obtain a roasted product.

[0056] The roasted product was pulverized and ground to 80 mesh. The roasted product was mixed with water at a solid-to-liquid ratio of 1g:4mL, reacted at a temperature of 75°C for 4 hours, with a stirring intensity of 250rpm, and filtered to separate the solid and liquid to obtain arsenic-removing slag and arsenic-removing liquid.

[0057] The arsenic-removing solution was evaporated and concentrated by a vacuum rotary evaporator, crystallized for the first time under the conditions of a temperature of 90°C and a vacuum of 0.1 MPa, and evaporated until the remaining volume was 25% of the initial volume. The crystallized liquid was placed in a water bath a...

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Abstract

The invention provides a method for recovering metal from copper-smelting electrostatic precipitation ash and an application and relates to the technical field of solid waste. The method comprises steps as follows: the copper-smelting electrostatic precipitation ash and an alkali are mixed and roasted; after a roasted product and water are subjected to mixing, infiltration and filtration, a filtrate and filtration residues are purified respectively, and products such as sodium arsenate, artificial lead-bismuth-silver ore, high-purity copper, zinc sulfate and the like are obtained finally. Themethod is easy and convenient to operate, high in controllability, high in comprehensive recovery rate and clean in process.

Description

technical field [0001] The invention relates to the technical field of solid waste, and in particular to a method and application for recovering metal from copper smelting electric dust collection soot. Background technique [0002] After the flue gas produced in the smelting process of copper concentrate passes through the waste heat boiler, after passing through the vortex dust collector, smoke exhaust machine and electric dust collector, the electric dust collector containing copper, zinc, lead and other valuable metal elements is obtained. soot. Due to the influence of raw materials, process methods, and process conditions, the composition of electric dust collection soot is complex, and the phase composition fluctuates greatly, so it is difficult to have a unified treatment method. For the treatment of electric dust collection soot, the fire method was the main method in the early days, and the domestic copper factories directly returned to smelting treatment. This not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B1/02C22B3/04C22B30/04C01G28/02C01D7/00
CPCC01D7/00C01G28/023C01P2006/80C22B1/02C22B3/04C22B7/006C22B7/02C22B30/04Y02P10/20
Inventor 王文祥李慧颖王晓阳莫越坚方红生
Owner GUANGDONG POLYTECHNIC OF ENVIRONMENTAL PROTECTION ENG
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