Method for producing copper sulfate from copper-bismuth scum

A technology of copper bismuth slag and copper sulfate, applied in the chemical industry, can solve the problems such as the lack of comprehensive utilization of copper and bismuth to carry out technical research and other problems

Active Publication Date: 2015-07-08
YUNNAN CHIHONG ZINC & GERMANIUM
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Problems solved by technology

[0007] The above process only carried out the research on copper-bismuth slag atmospheric pressure copper immersion tech

Method used

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  • Method for producing copper sulfate from copper-bismuth scum

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Effect test

Embodiment 1

[0046] (1) Grind 1 ton of crushed copper-bismuth slag (Cu 15.0wt%, Bi35.0wt%, Ag1.0wt%) with a ball mill to a particle size of 200, and put it into a hopper for leaching.

[0047] (2) Mix the copper-bismuth slag powder obtained in step (1) with a dilute sulfuric acid solution containing 120g / l of sulfuric acid initial acid, according to the liquid-solid ratio of 3:1, and blow in oxygen, at a temperature of 70°C and an oxygen partial pressure of 0.3MPa , The total pressure is 0.9MPa, the leaching time is 3 hours, and the pH value of the end point is controlled to 1.5 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 77%, and the slag rate is 82%;

[0048] (3) Add 1% hydrogen peroxide to the leaching solution of the copper sulfate solution obtained in step (2) for 90 minutes to remove the Fe 2+ Oxidized to Fe 3+ , and then the solution was heated by s...

Embodiment 2

[0052] (1) Grind 10kg of crushed copper-bismuth slag (Cu 30.0wt%, Bi45.0wt%, Ag1.1wt%) with a ball mill to a particle size of 300, and put it into a hopper for leaching.

[0053] (2) Mix the copper-bismuth slag powder obtained in step (1) with a dilute sulfuric acid solution containing 150 g / l of initial sulfuric acid at a liquid-to-solid ratio of 7:1, and blow in oxygen, at a temperature of 85°C and an oxygen partial pressure of 0.5 MPa. , The total pressure is 1.6MPa, the leaching time is 6 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 80°C to obtain the leaching liquid and leaching residue respectively, the leaching rate is 84%, and the slag rate is 68%;

[0054] (3) Add 2% hydrogen peroxide to the leaching solution of the copper sulfate solution obtained in step (2) for 30 minutes to remove the Fe 2+ Oxidized to Fe 3+ , and then the solution was heated by steam at 80°C ...

Embodiment 3

[0058] (1) Grind 100g of broken copper-bismuth slag (Cu 35.0wt%, Bi30.0wt%, Ag1.4wt%) with a ball mill to a particle size of 400, and put it into a hopper for leaching.

[0059] (2) Mix the copper-bismuth slag powder obtained in step (1) with a dilute sulfuric acid solution containing 160g / l of sulfuric acid initial acid, according to the liquid-solid ratio of 8:1, and blow in oxygen, at a temperature of 80°C and an oxygen partial pressure of 0.4MPa , The total pressure is 1.2MPa, the leaching time is 4 hours, and the pH value of the end point is controlled to 2.0 to obtain the leaching material liquid. The leaching material liquid is filtered at 85°C to obtain the leaching liquid and leaching residue respectively. The leaching rate is 85% and the slag rate is 63.5%;

[0060] (3) Add hydrogen peroxide to the copper sulfate solution leaching solution obtained in step (2) to remove the Fe therein. 2+ Oxidized to Fe 3+ , and then the solution was heated by steam at 80°C and conc...

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Abstract

The invention discloses a method for producing copper sulfate from copper-bismuth 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-bismuth 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-bismuth scum treatment process. According to the method, the raw material copper-bismuth 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 bismuth slag. Background technique [0002] Precious metals use pyrotechnics to treat lead anode slime. In the later stage of oxidation blowing precious lead, a silver-separated slag mainly containing bismuth and copper will be produced, also known as copper-bismuth slag. [0003] The known methods of using copper bismuth slag are: 1) direct production of refined bismuth method: directly as the raw material for the production of rough bismuth, mixed with anthracite, soda ash, etc. in proportion to reduce smelting to produce rough bismuth; 2) converter method: return to converter smelting to produce expensive bismuth Lead, recovery of lead and silver. [0004] Table 1 The advantages and disadvantages of known methods for producing copper sulfate from copper slag [0005] serial number process flow...

Claims

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Application Information

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IPC IPC(8): C22B7/04C22B15/00
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
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