Comprehensive recovery method for arsenic in arsenic sulfide residues and smoke leaching liquid in copper smelting

A recovery method and technology for arsenic sulfide, applied in chemical instruments and methods, arsenic oxide/arsenic hydroxide/oxyacid arsenic, arsenic compounds, etc. Complex problems, to achieve the effect of high resource utilization

Inactive Publication Date: 2018-07-06
DONGYING FANGYUAN NONFERROUS METALS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Arsenic sulfide slag and smoke leachate are treated separately, which cannot produce greater economic benefits, and the treatment process requires a large amount of chemicals, the process is complicated, and some processes have occupational health hazards
T

Method used

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  • Comprehensive recovery method for arsenic in arsenic sulfide residues and smoke leaching liquid in copper smelting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Copper sulfide

[0047] At a temperature of 60°C, a time of 5 hours, a stirring speed of 83r / min, and a liquid-to-solid ratio of 5:1 (L:kg) between the soot leaching solution and arsenic sulfide slag, the arsenic sulfide slag and soot leaching solution were subjected to atmospheric pressure sulfidation copper precipitation treatment, and filtered to obtain Copper sulfide and post-sulfide solution. The composition of copper sulfide and post-sulfurization solution is shown in the following table:

[0048] name

Cu

As

Zn

h 2 SO 4

Liquid after vulcanization (g / L)

13.23

40.53

46.92

73.63

Copper sulfide (wt%)

45.58

7.97

2.96

-

[0049] 2. Arsenic reduction

[0050] At a temperature of 65°C and a time of 3 hours, under the above conditions, introduce sulfur dioxide into the vulcanized solution obtained in step 1, the amount of sulfur dioxide introduced is 0.86 times of the arsenic content in the vulcaniz...

Embodiment 2

[0058] 1. Copper sulfide

[0059] The composition of copper sulfide and post-sulfurization solution is shown in the following table:

[0060] name

Cu

As

Zn

h 2 SO 4

Liquid after vulcanization (g / L)

12.23

45.35

48.25

80.24

Copper sulfide (wt%)

48.35

6.78

2.87

-

[0061] 2. Arsenic reduction

[0062] 3. Concentrated crystallization

[0063] At a temperature of 80°C, a time of 6 hours, and a vacuum of -0.02 MPa, under the above conditions, the arsenic-containing mother liquor obtained in step 2 is concentrated and crystallized, and filtered to obtain mixed sulfate crystals and concentrated liquid. The composition of the concentrated liquid is shown in the following table:

[0064] name

Cu

As

Zn

h 2 SO 4

Concentrated liquid (g / L)

38

4.56

3.27

596

[0065] 4. Sulfate redissolution

[0066] At a temperature of 40°C, a time of 3 hours, and a stirring speed...

Embodiment 3

[0069] 1. Copper sulfide

[0070] At a temperature of 60°C, a time of 5 hours, a stirring speed of 83r / min, and a liquid-to-solid ratio of 6:1 (L:kg) between the soot leaching solution and arsenic sulfide slag, the arsenic sulfide slag and soot leaching solution were subjected to atmospheric pressure sulfide copper precipitation treatment, and filtered to obtain Copper sulfide and post-sulfide solution. The composition of copper sulfide and post-sulfurization solution is shown in the following table:

[0071] name

Cu

As

Zn

h 2 SO 4

Liquid after vulcanization (g / L)

11.73

38.96

40.76

63.63

Copper sulfide (wt%)

44.27

8.23

3.27

-

[0072] 2. Arsenic reduction

[0073] At a temperature of 65°C and a time of 3 hours, under the above conditions, introduce sulfur dioxide into the vulcanized solution obtained in step 1, the amount of sulfur dioxide introduced is 1 times the content of arsenic in the vulcanized so...

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Abstract

The invention provides a comprehensive recovery method for arsenic in arsenic sulfide residues and a smoke leaching liquid in copper smelting. The smoke leaching liquid and the arsenic sulfide residues are subjected to normal-pressure vulcanization copper precipitation treatment to obtain solid state copper sulphide and a vulcanized liquid; the vulcanized liquid is discharged into a reaction tankII, and sulfur dioxide is introduced into the reaction tank II to make the vulcanized liquid converted into an arsenic-containing mother liquid; the arsenic-containing mother liquid is discharged intoa reaction tank III, the arsenic-containing mother liquid is subjected to concentration and crystallization, and filtration is performed to obtain a sulfate mixed crystal and a concentrated liquid; the sulfate mixed crystal is added into a reaction tank IV, copper sulfate and zinc sulfate in the sulfate mixed crystal are dissolved into water, and filtration is performed to obtain arsenic oxide and a solution of the copper sulfate and the zinc sulfate. The method provided by the invention has the advantages that the process collocation is reasonable, parameters in each process are strictly controlled, the arsenic can be safely disposed, and valuable elements such as copper, lead and zinc are recycled and effectively utilized, the purposes of environmental protection, economy, energy conservation and a high resource utilization rate are achieved, and harmlessness and resource utilization maximization of the arsenic are realized.

Description

technical field [0001] The invention relates to the field of copper smelting recovery, in particular to a comprehensive recovery method for copper smelting arsenic sulfide slag and arsenic leachate from smoke and dust. Background technique [0002] Copper, gold, silver and other non-ferrous metal ores usually contain arsenic. Arsenic enters the smelter along with the concentrate, and enters the flue gas, waste water, and waste residue in the form of sulfide or salt during the non-ferrous metallurgical process, and produces hazardous waste containing arsenic. During the copper smelting process, arsenic mainly enters the smelting flue gas, part of it enters the dirty acid produced by flue gas purification, and part of it enters the smelting soot. At present, the arsenic in the sewage acid adopts the process of sulfide precipitation to produce arsenic sulfide slag. The arsenic in the soot is leached by acid and solidified to produce calcium arsenate. Both arsenic sulfide slag...

Claims

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Application Information

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IPC IPC(8): C01G28/00C01G3/10C01G9/06C22B7/00C22B7/04
CPCC01G3/10C01G9/06C01G28/005C22B7/00C22B7/04Y02P10/20
Inventor 王海滨雒庆堂李象征张建凯
Owner DONGYING FANGYUAN NONFERROUS METALS
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