Process for treating black copper slag through electrolytic method

A black copper slag and electrolysis technology, applied in the metallurgical field, can solve the problems of polluting the environment, unable to form an open circuit, endangering human health, etc., achieving the effect of fast reaction speed, high gas and thermal energy utilization efficiency, and solving environmental pollution problems.

Active Publication Date: 2011-11-16
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, re-smelting makes arsenic circulate and enrich in the system, making it impossible to form an open circuit; whil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 530g of black copper slag containing 53.56% copper, in a reaction kettle with mechanical stirring and lined with acid-resistant anti-corrosion bricks, leaching with 4000mL sulfuric acid solution with a concentration of 150g / L at 70~80°C for 4h; The 5μm microporous filter membrane tube and microporous hollow plate are blown into air for oxidation leaching. The copper and acid concentrations in the leaching solution were determined to be 65.06g / L and 64.88g / L, respectively.

[0017] The leaching solution is repeatedly filtered by a filter press for 3 times to obtain the pre-electrolyte solution; then the pre-electrolyte solution is subjected to single-tank swirl electrolysis in a titanium 1-inch plate electrolyzer. The current density is set to 650 A / m with 20g / L copper in the electrolyte as the cut-off point 2 (copper greater than 20g / L) and 240A / m 2 (copper is less than 20g / L); when the copper in the electrolyte drops to 4.2g / L, the electrolysis is stopped, and 2...

Embodiment 2

[0019] Take 790kg of black copper slag containing 52.50% copper, in a reaction kettle with mechanical stirring, lined with anti-corrosion and acid-resistant bricks, with 7m 3 , Sulfuric acid solution with a concentration of 142g / L, leaching for 3.5h at 70~80°C. During the leaching process, air is blown into the microporous membrane tube and microporous hollow plate of a precision filter with a pore size of 10 μm for oxidative leaching. The copper and acid concentrations in the leachate were measured to be 58.24g / L and 49.36g / L, respectively.

[0020] The leaching solution was repeatedly filtered by a filter press for 3 times to obtain the pre-electrolysis solution. Then, the pre-electrolysis solution is electrolyzed in a titanium 6-inch plate electrolyzer with four tanks connected in series. The current density is set to 730 A / m with 20g / L copper in the electrolyte as the cut-off point 2 (copper greater than 20g / L) and 305A / m 2 (copper less than 20g / L). Stop electrolysis ...

Embodiment 3

[0022] Take 1600kg of black copper slag containing 55.47% copper in a reaction kettle with mechanical stirring and lined with anti-corrosion and acid-resistant bricks, and use 13.5 m 3 , Sulfuric acid solution with a concentration of 125g / L was leached at 70~80°C for 4h. During the leaching process, air is blown into the microporous membrane tube and microporous hollow plate of a precision filter with a pore size of 10 μm for oxidative leaching. The copper and acid concentrations in the leaching solution were measured to be 63.20g / L and 27.68g / L, respectively.

[0023] The leaching solution was filtered three times with a filter press to obtain the pre-electrolysis solution. Then, the pre-electrolyzed solution is electrolyzed in a titanium 8-inch plate electrolyzer with twelve tanks connected in parallel. The current density is set to 700 A / m with the copper content of 20g / L in the electrolyte as the cut-off point 2 (copper greater than 20g / L) and 250A / m 2 (copper less tha...

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PUM

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Abstract

The invention provides a process for treating black copper slag through an electrolytic method, belonging to the technical field of nonferrous metal metallurgy. The process comprises the following steps of: leaching out the black copper slag by using a sulfuric acid solution with the concentration of 80-250g/L at 70-80 DEG C for 3-4h in a reaction kettle according to the weight ratio of liquid tosolid of 6:1-10:1 and; blowing air into the reaction kettle in a leaching-out process for oxidizing and leaching out; fine filtering to obtain an electrolyte ahead fluid; and electrolyzing the electrolyte ahead fluid by adopting a swirling-flow electrolysis manner to produce standard cathode copper and a low-copper high-arsenic electrolyte residual liquid. The recovery of the copper in the black copper slag is realized through the production of the cathode copper, resources are fully utilized, and the excellent economic benefit is realized; and an electrodeposition residual liquid through hydrogen sulfide circulation generates arsenic deposition to form arsenic slag with the arsenic content of larger than 60%, and the arsenic slag enters a special dangerous waste landfill site to be deeply buried, thus the development of the arsenic is realized, and an environment pollution problem caused by emission of arsenic with smoke gas into air in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a method for treating black copper slag produced in a copper electrolysis process, in particular to a process for treating black copper slag by electrolysis. Background technique [0002] Black copper slag is a by-product produced during the copper electrolysis process of non-ferrous metal smelting, which not only contains impurities such as copper (50-55%) and arsenic (5-10%), but also contains a small amount of antimony and bismuth, etc. listed as dangerous. The traditional way to deal with black copper slag is to re-smelt or roast the arsenic together with the flue gas. However, re-smelting makes arsenic circulate and enrich in the system, making it impossible to form an open circuit; while the roasting method makes arsenic enter the atmosphere, seriously polluting the environment and endangering human health. Therefore, the treatment of black copper slag has always been a ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/08C25C1/12C22B15/00
CPCY02P10/20
Inventor 卓文王清宏杨晓霞李德祥叶先英张晋业宗红星彭万金宋亚冰
Owner JINCHUAN GROUP LIMITED
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