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Comprehensive treatment method for copper smelting smoke dust and black copper sludge

A comprehensive treatment, black copper slime technology, applied in the field of metallurgy, can solve problems such as copper recovery, low metal recovery rate, entering flue gas, etc., to achieve the effect of improving resource utilization, easy industrial application, and simplified treatment process

Active Publication Date: 2019-10-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the traditional technology processes black copper slime, most of them only consider the recovery of copper, and directly return the black copper slime to the copper smelting system, resulting in a vicious cycle of As, Pb, Sb, Bi, etc. in the copper smelting system, and some As, Pb , Sb, Bi, etc. enter the flue gas, causing adverse effects on the ecological environment
There are also many researchers who use acid leaching or alkaline leaching to treat black copper sludge, but there are generally problems such as cumbersome treatment process and low metal recovery rate. At the same time, highly toxic gas arsine may be produced, which has certain safety. Hidden danger

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The main components and contents of black copper mud and arsenic-containing dust are shown in Table 1 and Table 2:

[0019] The main component and content wt% of table 1 black copper mud

[0020] Cu As Sb Bi Pb Ni 42 22.5 6.2 2.3 0.7 0.5

[0021] Table 2 Main components and content wt% of arsenic-containing smoke dust

[0022] As Pb Fe Cu Zn 25.3 20.2 9.8 0.4 7.5

[0023] According to the mass ratio M 黑铜泥 :M 含砷烟尘 :M 硫酸钠 = 1:1:10 ratio Mix the three materials evenly, heat to 1000°C for high-temperature melting, keep warm for 5 hours, and separate layers after melting. After the reaction, the materials are divided into two layers, and the upper layer is a mixture containing arsenic and sodium. material; the lower layer is blister copper with yellow metallic luster, which is used for electrolytic refining of copper. Through detection and analysis, the recovery rate of blister copper is 90.7%, and the copper...

Embodiment 2

[0025] Black copper mud, arsenic-containing smoke and dust are consistent with embodiment 1.

[0026] According to the mass ratio M 黑铜泥 :M 含砷烟尘 :M 硫酸钠 =2:1:3 ratio Mix the three materials evenly, heat to 1200°C for high-temperature melting, keep warm for 2 hours, and separate layers after melting. After the reaction, the materials are divided into two layers, and the upper layer is a mixture containing arsenic and sodium. material; the lower layer is blister copper with yellow metallic luster, which is used for electrolytic refining of copper. Through detection and analysis, the recovery rate of blister copper is 90.5%, and the copper content in the blister copper is 99.3%.

Embodiment 3

[0028] The main components and contents of black copper mud and arsenic-containing dust are shown in Table 3 and Table 4:

[0029] The main component and content wt% of table 3 black copper mud

[0030] Cu As Sb Bi Pb Ni 51.5 17.9 1.9 1.8 0.6 0.6

[0031] Table 4 Main components and content wt% of arsenic-containing smoke dust

[0032] As Pb Cu Zn Bi 8.4 26.9 3.1 11.7 2.2

[0033] According to the mass ratio M 黑铜泥 :M 含砷烟尘 :M 硫酸钠 = 1:5:12 ratio Mix the three materials evenly, heat to 1300°C for high-temperature melting, keep warm for 1 hour, and separate layers after melting. After the reaction, the materials are divided into two layers, and the upper layer is a mixture containing arsenic and sodium. material; the lower layer is blister copper with yellow metallic luster, which is used for electrolytic refining of copper. Through detection and analysis, the recovery rate of blister copper is 90.1%, and the coppe...

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Abstract

The invention discloses a comprehensive treatment method for copper smelting smoke dust and black copper sludge. The comprehensive treatment method for the copper smelting smoke dust and the black copper sludge includes: preforming high temperature smelting on the black copper sludge, the arsenic-containing smoke dust and sodium sulfate which are mixed evenly to obtain a melt, and layering the melt after cooling, thereby obtaining a mixed material containing arsenic and natrium on the upper layer and crude copper on the lower layer, wherein the crude copper can be used for electrolytic refining of copper. The comprehensive treatment method for the copper smelting smoke dust and the black copper sludge achieves synergistic treatment for the copper smelting smoke dust and the black copper sludge, is short in technical process and simple to operate, and improves recovery rate of resources.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for comprehensively treating copper smelting dust and black copper sludge. Background technique [0002] During the copper smelting process, arsenic-containing smoke will be produced, in which the arsenic content is between 5% and 30%, and it also contains valuable metals such as copper, lead, and zinc. The components of this type of soot are very complex and difficult to handle. Copper smelting enterprises mostly use the method of ore blending and smelting, which leads to an increase in the amount of smoke and dust in the copper smelting system, and the working condition of the furnace also deteriorates. Due to the closed circulation and accumulation of impurities in the copper smelting system, it has a great impact on the product quality of cathode copper. In the copper electrolytic refining process, when the impurities in the electrolyte accumulate to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B15/00C22B30/04
CPCC22B7/001C22B7/02C22B15/0028C22B30/04Y02P10/20
Inventor 刘旭恒赵中伟陈星宇李江涛何利华刘旭黄家豪
Owner CENT SOUTH UNIV
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