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A kind of method that copper scum produces copper sulfate

A copper scum and copper sulfate technology, applied in the chemical industry, can solve the problems of copper not being comprehensively utilized and exhaust gas being difficult to handle

Active Publication Date: 2017-09-26
YUNNAN CHIHONG ZINC & GERMANIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses anthracite as a reducing agent and fuel, the tail gas is difficult to treat, and copper has not been comprehensively utilized

Method used

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  • A kind of method that copper scum produces copper sulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Grind 1 ton of broken copper scum (Cu15.0wt%, Pb75.0wt%) with a ball mill to a particle size of 200, and put it into a hopper for leaching.

[0053] (2) Mix the copper scum powder obtained in step (1) with dilute sulfuric acid solution containing 130g / l of sulfuric acid initial acid according to the liquid-solid ratio of 5:1, and blow in oxygen, at a temperature of 65°C and an oxygen partial pressure of 0.3MPa , The total pressure is 0.8MPa, the leaching time is 3 hours, and the pH value of the end point is controlled to 2 to obtain the leaching material liquid. The leaching material liquid is filtered at 80°C to obtain the leaching liquid and leaching residue respectively. The leaching rate is 92% and the slag rate is 85%;

[0054] (3) Add 2% hydrogen peroxide to the copper sulfate solution leaching solution obtained in step (2) for 2 hours to remove the Fe 2+ Oxidized to Fe 3+ , and then the solution was heated by steam at 80°C and concentrated to a specific grav...

Embodiment 2

[0059] (1) Grind 200g of broken copper scum (Cu10.0wt%, Pb80.0wt%) with a ball mill to a particle size of 400, and put it into a hopper for leaching.

[0060] (2) Mix the copper scum powder obtained in step (1) with a dilute sulfuric acid solution containing 130g / l of initial sulfuric acid, according to the liquid-solid ratio of 7:1, and blow in oxygen, at a temperature of 75°C and an oxygen partial pressure of 0.6MPa , The total pressure is 1.5MPa, the leaching time is 3 hours, and the pH value of the end point is controlled to 2.5 to obtain the leaching material liquid, and the leaching material liquid is filtered at 85°C to obtain the leaching liquid and leaching residue respectively, the leaching rate is 95%, and the slag rate is 96%;

[0061] (3) First add hydrogen peroxide with a volume ratio of 3% to the copper sulfate solution leaching solution obtained in step (2) and react for 1 hour to remove the Fe therein. 2+ Oxidized to Fe 3+ , and then the solution was heated b...

Embodiment 3

[0066] (1) Grind 20g of broken copper scum (Cu3.0wt%, Pb85.0wt%) with a ball mill to a particle size of 200, and put it into a hopper for leaching.

[0067] (2) Mix the copper scum powder obtained in step (1) with a dilute sulfuric acid solution containing 200g / l of sulfuric acid initial acid according to the liquid-solid ratio of 10:1, and blow in oxygen, at a temperature of 85°C and an oxygen partial pressure of 0.8MPa , The total pressure is 2.0MPa, the leaching time is 3 hours, and the pH value of the end point is controlled to be 3 to obtain the leaching material liquid. The leaching material liquid is filtered at 80°C to obtain the leaching liquid and leaching residue respectively. The leaching rate is 96%, and the slag rate is 97%;

[0068] (3) First add 4% hydrogen peroxide by volume to the copper sulfate solution leaching solution obtained in step (2) and react for 1 hour to remove the Fe therein. 2+ Oxidized to Fe 3+ , and then the solution was heated by steam at 85...

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Abstract

The invention discloses a method for producing copper sulfate from copper scum, which comprises the steps of pretreatment, leaching, iron removal, calcium / magnesium removal, and crystallization and concentration. The method specifically comprises the following steps: crushing and grinding the raw material copper scum, adding a sulfuric acid solution, introducing oxygen or oxygen-enriched air to react, filtering, adding oxydol into the leach solution to react, concentrating, regulating the pH value to 2-4, carrying out hydrolysis reaction to obtain a ferric hydroxide precipitate, carrying out pressure filtration to obtain a filtrate a and a filter residue b, heating the filtrate a, concentrating, cooling, and filtering to obtain a filtrate c and a filter residue d; and concentrating and crystallizing the filtrate c, and carrying out vacuum centrifugal separation to obtain the target substance. The method overcomes the defect of comprehensive recovery in the existing copper scum treatment process. According to the method, the raw material copper scum containing 10-40% of copper and 30-50% of bismuth is subjected to oxygen pressure leaching by the dilute sulfuric acid solution, the obtained leach solution is subjected to iron / calcium / magnesium removal, and the concentrated crystal is dried to obtain the YS / t94-2007 top-grade chalcanthite product.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and in particular relates to a method for producing copper sulfate from copper scum. Background technique [0002] Copper scum is the product of crude lead melting and copper removal, which contains 3-15% copper, 75-85% lead, 1-2% zinc, 1-2% antimony, 300-2000g / t silver and other elements (iron , calcium, magnesium, sulfur, etc.). Due to the different slag removal methods and equipment, the forms of copper scum are also different, and there are common forms such as loose fine particles and lumps. [0003] The known treatment processes using copper scum can be divided into blast furnace method, reverberatory furnace method, electric furnace method, rotary furnace method, acid leaching method, ammonia leaching method and the like. Blast furnaces process copper dross, the ratio of Cu / Pb in copper matte is low (nearly 2 to 3), the recovery rate of copper is low, and a large amount of copp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B15/00
CPCY02P10/20
Inventor 吴红林贾著红孙成余罗永光张候文邹利明王瑞山罗凌艳廖为新邓远久张梅李加平
Owner YUNNAN CHIHONG ZINC & GERMANIUM