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A low-energy-consumption method for producing electrolytic copper from copper-containing sludge

A technology for copper sludge and electrolytic copper, applied in the field of electrolytic copper production and low energy consumption, can solve problems such as the application of undisclosed sodium caseinate, and achieve the effects of overcoming low current efficiency, improving current efficiency and increasing output

Active Publication Date: 2019-05-14
ZHAOQING FEINAN METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of sodium caseinate in the production of electrolytic copper is not disclosed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, a kind of method of utilizing copper-containing sludge to produce electrolytic copper with low energy consumption

[0023] A) sintering: sintering the copper-containing sludge until the water content of the obtained agglomerate is 2%;

[0024] B) Smelting: move the sintered block into the smelting furnace, add limestone 3.5kg / t Cu, quartzite 7.0kg / t Cu and carbon 11kg / t Cu, and continuously feed air with an oxygen volume concentration of 35% for calcination to obtain crude Copper, wherein the calcination temperature is 1200°C;

[0025] C) Refining: move the blister copper into the refining furnace, add heavy oil 3kg / t Cu, and continuously feed air with an oxygen volume concentration of 99.5% to mix the blister copper, add quartz stone 5kg / t Cu, and obtain a copper content of 98% The anode copper plate and refining slag, where the calcination temperature is 1200°C;

[0026] D) Electrolysis: use the anode copper plate as the anode, and the pure copper shee...

Embodiment 2

[0027] Embodiment 2, a kind of method of utilizing copper-containing sludge to produce electrolytic copper with low energy consumption

[0028] The difference between Example 2 and Example 1 is that in step D), 12mg / L silk fibroin, 3mg / L polyethylene glycol and 10mg / L sodium caseinate are added; Periodic forward and reverse current for electrolysis; the current density is 280A / m 2 .

Embodiment 3

[0029] Embodiment 3, a kind of method of utilizing copper-containing sludge to produce electrolytic copper with low energy consumption

[0030] The difference between Example 3 and Example 1 is that in step D), 15mg / L silk fibroin, 10mg / L polyethylene glycol and 20mg / L sodium caseinate are added; Periodic forward and reverse current for electrolysis; the current density is 300A / m 2 .

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Abstract

The invention belongs to the field of waste resource utilization, and particularly relates to a low energy consumption method for producing electrolytic copper through copper containing sludge. The method comprises the steps of sintering, smelting, refining and electrolysis. In the electrolysis step, following concentrations of additives including 10-15 mg / L of silk fibroin, 1-10 mg / L of polyethylene glycol and 10-20 mg / L of sodium caseinate are added in an electrolyte. The purity obtained through production of the method reaches up to 99.99%, the problems that when periodical forward and reverse electrolysis is conducted through high-density current, the current efficiency is low, and power consumption is large are effectively solved, and the cathode copper yield can reach up to 636,400 tons every year.

Description

technical field [0001] The invention belongs to the field of resource utilization of waste, and in particular relates to a low-energy-consumption method for producing electrolytic copper from copper-containing sludge. Background technique [0002] At present, the world's copper production process mainly adopts fire refining, and its product output accounts for about 85% of the total output of refined copper. The specific process can be roughly divided into three steps: smelting-blowing-fire refining and electrolytic refining. The product is electrolytic copper with a purity of over 99.95%. However, the refining slag produced in the pyro-refining process also contains 45-55% copper, 1-2% nickel and 3-5% tin. If the refining slag is repeated to produce electrolytic copper, it will not only waste it nickel and tin, and will lead to higher energy consumption of the overall process, which is not conducive to its wide application. [0003] In response to the above technical prob...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/12C25C7/06C22B1/16C22B7/00C22B15/00
CPCC22B1/16C22B7/001C22B15/0026C25C1/12C25C7/06Y02P10/20
Inventor 俞挺刘长胜郑立邦倪钟孝
Owner ZHAOQING FEINAN METAL