Method for efficiently recycling valuable metal in copper dross

A valuable metal, copper scum technology, applied in the field of metallurgy, can solve the problems of complex alkali leaching process, high anti-corrosion requirements, difficult waste gas treatment and other problems, achieve complete metal separation, low production cost, and strong raw material adaptability Effect

Active Publication Date: 2015-08-19
KUNMING METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional acid leaching method has the disadvantages of long reaction time and low copper leaching rate; the ammonia leaching method involves the use of ammonia gas, has high anti-corrosion requirements, and is difficult to treat waste gas; Big

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The copper scum containing 24.53% of copper and 5.42% of lead, which has been finely ground to a particle size of 0.01~1mm, is leached with sulfuric acid at a concentration of 150g / L and a liquid-solid ratio of 5:1. After the leaching reaction time, the leaching slurry is vacuum filtered to obtain the leaching solution and leaching residue, and the leaching residue is returned to the lead system. The copper content of the leaching solution is 47.09g / L, the content of indium is 72mg / L, and the content of germanium is 65mg / L. The leaching solution first extracts and extracts indium, uses 15% P204+85% sulfonated kerosene as the extractant, compares A / O=3:1, temperature 35°C, extraction stages 4, mixing time 5min, extracts indium The rate is 92.8%, and the loaded organic phase after extraction is 3NHCl+2NZnCl 2 As a stripping agent, the stripping condition is at room temperature, compared with O / A=5:1, stripping time is 10min, two-stage stripping, the indium stripping rate...

Embodiment 2

[0039] The copper scum containing 21.41% of copper and 5.31% of lead that has been finely ground to a particle size of 0.01~1mm is added with sulfuric acid at a concentration of 80g / L and a liquid-solid ratio of 4:1, adding hydrogen peroxide at a concentration of 80g / L at 80°C Oxidation stirring leaching, after reaching the leaching reaction time, the leaching slurry is vacuum filtered to obtain leachate and leaching residue, and the leaching residue is returned to the lead system. The copper content of the leaching solution is 52.4g / L, the content of indium is 68mg / L, and the content of germanium is 87mg / L. The leaching solution first extracts and extracts indium, uses 20% P204+80% sulfonated kerosene as the extraction agent, compares A / O=5:1, temperature 35°C, extraction stages 3, mixing time 5min, extracts the extraction of indium The rate is 93.4%, and the loaded organic phase after extraction is 3NHCl+2NZnCl 2 As a stripping agent, the stripping condition is at room temp...

Embodiment 3

[0041] The copper scum containing 34.13% copper and 16.86% lead which has been finely ground to a particle size of 0.01~1mm is added with 10g / L permanganate at 90°C with a sulfuric acid concentration of 150g / L and a liquid-solid ratio of 6:1. Potassium aqueous solution is oxidized and stirred for leaching. After the leaching reaction time is reached, the leaching slurry is vacuum filtered to obtain leaching liquid and leaching slag, and the leaching slag is returned to the lead system. The copper content of the leaching solution is 54.5g / L, the content of indium is 57mg / L, and the content of germanium is 73mg / L. The leaching solution first extracts and extracts indium, uses 25% P204+75% sulfonated kerosene as the extraction agent, compares A / O=7:1, temperature 35°C, extraction stage 4, mixing time 5min, extracts the extraction of indium The rate is 93.4%, and the loaded organic phase after extraction is 3NHCl+2NZnCl 2 As a stripping agent, the stripping condition is at room t...

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Abstract

The invention discloses a method for efficiently recycling valuable metal in copper dross, comprising the following steps: crushing the copper dross, levigating, classifying, atomizing for pulverization, adding a sulfuric acid solution and an oxidizing agent for acid leaching, and performing residue and fluid separation on slurry to obtain lixivium and leaching residues; adding an extracting agent into the lixivium to extract indium, extracting germanium from the extract after indium is extracted, and producing cathode copper by adopting a conventional electrowinning method from the extract after the germanium is extracted; mixing the leaching residues with lead concentrate, adding into an oxygen-enriched top blown converter or bottom blown converter for reduction smelting so as to produce lead bullion, further performing electrolysis refining on the lead bullion, recycling lead, and further trapping gold, silver, bismuth, stibium, platinum and palladium in anode mud for recycling treatment. The method has the advantages of being high in metal recycling rate, low in production cost, good in economic benefits, high in raw material adaptability, clean, environment-friendly and the like.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for efficiently recovering valuable metals from copper dross. Background technique [0002] In the process of smelting non-ferrous metals, a large amount of copper scum will be produced. In addition to copper, lead, and silver, this type of slag also contains metals such as germanium, indium, gold, bismuth, antimony, platinum, and palladium, which are refractory polymetallic minerals. Resources, with a greater comprehensive recycling value. [0003] At present, smelting enterprises at home and abroad mainly use pyrotechnics to process these copper scums, which have disadvantages such as low metal recovery rate, large energy consumption, serious environmental pollution, and high production costs. The traditional fire process mainly includes blast furnace melting method, reverberatory furnace melting method, rotary kiln melting method, converter melting met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/04C22B15/00
CPCY02P10/20
Inventor 包崇军汪云华胥福顺张旭东谢刚杨毅闫森李小英张永平翟忠标田林方树铭许娜施辉献陈科彤
Owner KUNMING METALLURGY INST
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