Recovery method and recovery device for valuable metals in waste miscellaneous copper electrolysis anode slime

A recovery method and technology of valuable metals, applied to the improvement of process efficiency, instruments, optics, etc., can solve the problems of complex composition of waste miscellaneous copper electrolysis anode slime, threats to the ecological environment and human health, and large fluctuations, and achieve the goal of process reagents Low consumption, high direct yield, and the effect of reducing the burden of impurity removal

Active Publication Date: 2022-03-01
CHINA ENFI ENGINEERING CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the continuous and rapid development of the renewable electrolytic refining copper industry, the output of waste miscellaneous copper electrolytic anode slime has also been continuously increased. A variety of heavy metals and precious metals such as gold and silver will pose a threat to the ecological environment and human health if not handled in time
[0003] At present, there are extensive researches on the recovery process of ore copper electrolysis anode slime at home and abroad, and there are also reports on methods for recovering valuable metals from waste miscellaneous copper anode slime, but these methods are mainly for the recovery of lead, tin and precious metals (gold, silver, etc.). And these recycling methods are energy-intensive

Method used

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  • Recovery method and recovery device for valuable metals in waste miscellaneous copper electrolysis anode slime
  • Recovery method and recovery device for valuable metals in waste miscellaneous copper electrolysis anode slime

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Put the dried materials into the rotary kiln to ventilate the air for drying and oxidative roasting, the roasting temperature is 700°C, the roasting time is 1h, and then air-cooled. The obtained calcined sand was stirred for 1 hour at a sulfuric acid concentration of 150g / L, a liquid-solid ratio of 3:1, and a temperature of 70°C, and the leaching solution and leaching slag were obtained by filtration. After analysis, the copper concentration of the leaching solution was 48g / L, and the leaching rate was 98.9%. The current density is 450A / m 2 A period of swirl electrowinning is carried out under the following conditions to obtain a copper concentration of 35g / L in the solution I after electrowinning; 2 Carry out two-stage swirl electrowinning to obtain a copper concentration of 15g / L in the electrolytic liquid II; 2 Under three-stage swirl electrowinning, the concentration of copper in solution III after electrowinning was 1.0 g / L. Distill the leaching residue at NaOH c...

Embodiment 2

[0093] Put the dried material into the rotary kiln to ventilate the air for drying and oxidative roasting, the roasting temperature is 650°C, the roasting time is 1.5h, and then air-cooled. The obtained calcined sand was stirred for 1 hour at a sulfuric acid concentration of 180g / L, a liquid-solid ratio of 2.5:1, and a temperature of 70°C, and the leaching solution and leaching residue were obtained by filtration. After analysis, the copper concentration of the leaching solution was 45g / L, and the leaching rate was 95.5%. The current density is 480A / m 2 A period of swirling electrowinning was carried out under the following conditions to obtain a copper concentration of 33g / L in the solution I after electrowinning; 2 Carry out two stages of swirl electrowinning to obtain a copper concentration of 12g / L in the electrolytic liquid II; 2 Three-stage swirl electrowinning was carried out under the following conditions, and the copper concentration of liquid III after electrowinnin...

Embodiment 3

[0095] Put the dried material into the rotary kiln to ventilate the air for drying and oxidative roasting, the roasting temperature is 600°C, the roasting time is 2.0h, and then air-cooled. The obtained calcined sand was stirred for 1 hour at a sulfuric acid concentration of 200g / L, a liquid-solid ratio of 2.5:1, and a temperature of 70°C, and the leaching solution and leaching residue were obtained by filtration. The copper concentration of the leaching solution was analyzed to be 43g / L, and the leaching rate was 91.6%. The current density is 500A / m 2 A period of swirl electrowinning is carried out under the following conditions to obtain a copper concentration of 30g / L in the solution I after electrowinning; 2 Carry out two-stage swirl electrowinning to obtain a copper concentration of 10g / L in the electrolytic liquid II; 2 Three-stage swirl electrowinning was carried out under the following conditions to obtain a copper concentration of 0.5 g / L in solution III after electr...

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Abstract

The invention provides a method and a recovery device for recovering valuable metals in waste miscellaneous copper electrolysis anode slime. The recovery method comprises: sequentially performing oxidation roasting and acid leaching treatment on waste miscellaneous copper electrolytic anode slime to obtain copper-containing acid leaching solution and acid leaching residue; performing multiple electrowinning treatments on the copper-containing acid leaching solution to obtain cathode copper; The acid leaching slag is subjected to alkali leaching treatment to obtain lead-tin alkali leaching solution and precious metal slag. The process is short, the copper leaching rate is high, and the direct recovery rate is high. In the acid leaching treatment step, while copper is recovered by electrowinning, some impurity elements such as nickel and arsenic are removed in advance, which effectively reduces the precious metal recovery process in the subsequent precious metal slag. The burden of removing impurities. The process reagent consumption in the method is low, and the electrowinning process is a sealed operation without acid mist, and the working environment is good and pollution-free.

Description

technical field [0001] The invention relates to the field of recovery of valuable metals, in particular to a method and a recovery device for recovery of valuable metals in waste miscellaneous copper electrolysis anode slime. Background technique [0002] Waste miscellaneous copper is smelted from complex raw materials such as waste miscellaneous copper, copper-containing sludge, electroplating sludge, smelting dust, waste circuit boards, etc., which are then electrolytically refined to obtain high-purity electrolytic copper. A large amount of waste miscellaneous copper electrolytic anode slime is deposited at the bottom of the electrolytic cell. In recent years, with the continuous and rapid development of the renewable electrolytic refining copper industry, the output of waste miscellaneous copper electrolytic anode slime has also been continuously increased. Such heavy metals and precious metals such as gold and silver will pose a threat to the ecological environment and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B1/02C22B15/00C22B25/06C22B11/00C25C1/12C25C1/14C25C7/00
CPCC22B7/007C22B1/02C22B15/0071C22B25/06C22B25/04C22B11/042C25C1/12C25C1/14C25C7/00Y02P10/20
Inventor 李冲王晓丹徐小锋崔沐宋珍珍
Owner CHINA ENFI ENGINEERING CORPORATION
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