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Method for producing copper oxide powder from electrolytic copper powder washing wastewater

A technology of electrolytic copper powder and copper oxide powder, applied in copper oxide/copper hydroxide and other directions

Inactive Publication Date: 2014-05-07
重庆华浩冶炼有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In summary, a large amount of copper-containing waste slag produced in the production of electrolytic copper powder is dumped and landfilled, which affects the environment; it is a waste to let other manufacturers take it away Copper resources, increasing wastewater treatment costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 2. Roast the above-mentioned copper-containing waste slag in a fluid atomization roasting furnace, the roasting temperature is 500°C, and the roasting time is 100 minutes;

[0024] 3. For the first crushing, the particle size is controlled from -40 mesh to +100 mesh, accounting for 90%-93% (by weight percentage);

[0025] 4. Sieve, and then use a washing filter press to wash and filter for 2 hours;

[0026] 5. Use a paddle dryer to dry, the drying temperature is 100-125°C, and the drying time is 92-100min; the dried material is added to a graded impact mill for crushing and sorting, and the particle size is controlled at less than 800 meshes to obtain Copper oxide powder products. The copper oxide powder product obtained by the production method has a copper oxide content of more than 98wt%, a sulfate content of 0.016wt%, a particle size of less than 800 mesh, excellent product quality, and a copper oxide powder yield of up to 95%.

[0027] Example 2

[0028] A meth...

Embodiment 2

[0030] 2. Roast the above copper-containing waste slag in a fluidized atomization roaster at a roasting temperature of 700°C and a roasting time of 70 minutes;

[0031] 3. For the first crushing, the particle size is controlled from -50 mesh to +100 mesh, accounting for 92%-96% (by weight percentage);

[0032] 4. Sieve, and then use a washing filter press to wash and filter for 1 hour;

[0033] 5. Use a paddle dryer to dry, the drying temperature is 180-200°C, and the drying time is 70-78min; the dried material is added to a graded impact mill for crushing and sorting, and the particle size is controlled to be less than 800 meshes to obtain Copper oxide powder products. The copper oxide powder product obtained by the production method has a copper oxide content of more than 98wt%, a sulfate content of 0.018wt%, a particle size of less than 800 mesh, excellent product quality, and a copper oxide powder yield of up to 83%.

[0034] Example 3

[0035] A method for producing c...

Embodiment 3

[0037] 2. Roast the above copper-containing waste slag in a fluid atomization roasting furnace, the roasting temperature is 600°C, and the roasting time is 85 minutes;

[0038] 3. For the first crushing, the particle size is controlled from -40 mesh to +100 mesh, accounting for 95% (by weight percentage);

[0039] 4. Sieve, and then use a washing filter press to wash and filter for 3 hours;

[0040] 5. Use a paddle dryer to dry, the drying temperature is 150-165°C, and the drying time is 85-95min; the dried material is added to a graded impact mill for crushing and sorting, and the particle size is controlled at less than 800 meshes to obtain Copper oxide powder products. The copper oxide powder product obtained by the production method has a copper oxide content of ≥98wt%, a sulfate content of ≤0.012wt%, a particle size of less than 800 mesh, and excellent product quality, while the yield of the copper oxide powder can be as high as 98%.

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PUM

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Abstract

The invention relates to a method for producing copper oxide powder from electrolytic copper powder washing wastewater, which comprises the following steps: adding a liquid alkali solution into electrolytic copper powder washing wastewater, stirring uniformly, adding a flocculant to precipitate, and carrying out pressure filtration to obtain cupriferous waste slag with the water content of 50-60 wt%; and carrying out roasting, primary crushing, screening, elutriation, drying, crushing and air separation on the cupriferous waste slag to obtain copper oxide powder, wherein the roasting is performed in a fluid-state atomization roasting furnace at 500-700 DEG C for 70-100 minutes, and the particles with the particle size of -40 to +100 meshes account for 90-100 wt% in the primary crushing process. In the copper oxide powder product obtained by the production method, the copper oxide content is at least 98 wt%, the sulfate content is at most 0.02 wt%, and the particle size is less than 800 meshes; the product quality is excellent; and meanwhile, the maximum yield of the copper oxide powder can reach 98%.

Description

technical field [0001] The invention relates to a method for producing copper oxide powder, in particular to a method for producing copper oxide powder by using powder washing wastewater discharged during the production of electrolytic copper powder as a raw material. Background technique [0002] In the production of electrolytic copper powder, the obtained electrolytic copper powder contains a large amount of CuSO 4 , when elutriating electrolytic copper powder, CuSO 4 Into the wastewater, resulting in wastewater containing high copper ions. [0003] At present, the treatment of a large amount of wastewater containing high-concentration copper ions produced in the above electrolytic copper powder production process is to add liquid alkali solution to the wastewater, stir evenly, add flocculant to precipitate, and filter through a filter press. The obtained filter residue should be pulled away by the manufacturer. Extract copper sulfate or simply dump it into landfill. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02
Inventor 胡安怀胡光明孟庆芳谭宏伟
Owner 重庆华浩冶炼有限公司