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Direct scrap copper electrolysis method

A waste miscellaneous copper, direct technology, applied in the field of recycling of renewable resources, can solve problems such as the increase of electrolyzer cell voltage, achieve the effects of eliminating concentration polarization, increasing economic added value, and improving quality

Inactive Publication Date: 2020-06-19
TONGLING NON FERROUS METAL GROUP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is that the existing waste miscellaneous copper electrolysis additive contains gelatin, which will lead to an increase in the voltage of the electrolytic cell, and the inclusion of thiourea will introduce sulfur impurities into the electrolytic copper, so a direct electrolysis of waste miscellaneous copper is provided. method

Method used

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  • Direct scrap copper electrolysis method

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Experimental program
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Effect test

Embodiment 1

[0020] Scrap copper raw material composition (%): Cu 95.71, Zn 0.079, Sn 0.00019, Sb 0.00016, Bi 0.0001, Pb0.00019, As 0.00071. The anode frame 1 is a non-conductive anode frame, the copper sheet is a conductive material, and the opening ratio of the conductive anode frame is 30%; the composition of the electrolyte: Cu 2+ 48g / L, H 2 SO4 190g / L, As 8g / L, Sb 0.3g / L, Bi 0.3g / L, Cl - 0.05g / L; current density 260A / m 2 ;Electrolysis temperature 60°C; Homopolar distance 12cm; Circulation speed per cathode area of ​​electrolyte 50L / min.m 2; Electrolysis additives: gelatin dosage 120g / tCu, protein powder dosage 10g / tCu, thiourea dosage 100g / tCu, additive A polyethylene glycol dosage 20g / tCu, avi common dosage 15g / tCu; electrolysis process electrolytic tank liquid inlet The suspended matter content is less than 5ppm, and the suspended matter content in the overflow port is less than 10ppm. Electrolysis is carried out under the above conditions, and the waste copper in the anode fra...

Embodiment 2

[0022] Scrap copper raw material composition (%): Cu 95.34, Zn 0.058, Sn 0.27, Sb 0.0041, Bi 0.022, Pb 0.0021, As 0.0031. The anode frame is a non-conductive anode frame, the copper sheet is a conductive material, and the opening ratio of the conductive anode frame is 15%; the electrolyte composition: Cu 2+ 40g / L, H 2 SO4 180g / L, As 2g / L, Sb 0.2g / L, Bi 0.2g / L, Cl - 0.08g / L; current density 200A / m2; electrolysis temperature 45°C; homopolar distance 12cm; electrolyte circulation rate per unit cathode area 25L / min.m2; electrolysis additives: gelatin dosage 100g / tCu, protein powder dosage 30g / tCu, The dosage of thiourea is 80g / tCu, the dosage of additive A polyvinyl alcohol is 30g / tCu, and the dosage of Avi is 10g / tCu; during the electrolysis process, the suspended solids content in the liquid inlet of the electrolytic cell is less than 10ppm, and the suspended solids content in the overflow port is less than 15ppm. Electrolysis is carried out under the above conditions, and th...

Embodiment 3

[0024] Scrap copper raw material composition (%): Cu 96.58, Zn 0.096, Sn 0.12, Sb 0.0087, Bi 0.015, Pb 0.0095, As 0.0086. The anode frame is a non-conductive anode frame, the copper sheet is a conductive material, and the opening ratio of the conductive anode frame is 25%; the electrolyte composition: Cu 2+ 55g / L, H 2 SO4 200g / L, As 5g / L, Sb 0.5g / L, Bi 0.5g / L, Cl - 0.1g / L; current density 220A / m2; electrolysis temperature 65°C; homopolar distance 12cm; electrolyte circulation rate per cathode area 35L / min.m2; electrolysis additives: gelatin dosage 110g / tCu, protein powder dosage 20g / tCu, The dosage of thiourea is 120g / tCu, the dosage of additive A polyoxyethylene naphthalene ether is 25g / tCu, and the dosage of Avi is 20g / tCu; the content of suspended solids in the liquid inlet of the electrolytic cell during electrolysis is less than 8ppm, and the content of suspended solids in the overflow port is less than 12ppm. Under the above conditions, the electrolysis is carried out,...

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Abstract

The invention discloses a direct scrap copper electrolysis method. The direct scrap copper electrolysis method comprises the following steps that firstly, a non-conductive anode frame is adopted, a copper sheet serves as a conductive material for the anode frame, scrap copper is arranged on the two sides of the copper sheet, the non-conductive anode frame is loaded on a conductive bar, a permanentstainless steel cathode plate serves as a cathode, and an acid copper sulfate solution serves as an electrolyte; secondly, gelatin, albumen powder, thiourea, acitretin and an additive A are added inan electrolytic cell to serve as an electrolysis additive; and thirdly, electrolysis is conducted, scrap copper in the non-conductive anode frame is constantly dissolved, and A-level copper standard electrolytic copper is obtained through stainless steel cathode deposition. The direct scrap copper electrolysis method has the beneficial effects that through electrolysis additive optimization improvement and electrolysis process electrolyte filter quality control, the double-spraying-flow collaborative bottom liquid inflow manner is adopted, concentration polarization is eliminated, the voltageof the electrolytic cell and the electrolytic copper impurity content are greatly reduced, the electrolytic copper product quality is improved, and the electrolytic product economic additional value is increased.

Description

technical field [0001] The invention relates to the field of recycling of renewable resources, in particular to a method for direct electrolysis of waste miscellaneous copper. Background technique [0002] At present, the conventional method for regenerated copper is that waste miscellaneous copper is first smelted by fire to form anode plates, and then electrolytically refined into electrolytic copper. The fire smelting of waste miscellaneous copper generally adopts the two-stage method, that is, it is first reduced to smelting in a blast furnace or blown in a converter, and then refined into anode copper in a reverberatory furnace. However, a large number of enterprises use simple production processes, such as cupolas, small reverberatory furnaces, etc., to smelt and recycle scrap copper. Most of the products obtained are crude copper (commonly known as black copper); due to backward technical equipment, not only can High consumption, low resource recycling rate, and extr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/12C25C7/06
CPCC25C1/12C25C7/06Y02P10/20
Inventor 俞鹰钱俊杰方支灵许冬潘荣选申其新
Owner TONGLING NON FERROUS METAL GROUP CORP
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