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Method for separating and recovering valuable metals from copper anode slime

A copper anode slime, separation and recovery technology, applied to the improvement of process efficiency, element selenium/tellurium, etc., can solve the problems of poor comprehensive recovery effect, single recovered metal, low recovery rate, etc., and achieve quick results and high comprehensive recovery rate , short time effect

Active Publication Date: 2016-05-04
郴州百一环保高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many researches on metal recovery methods in copper anode slime, but most of them have disadvantages such as high cost, single recovered metal, poor comprehensive recovery effect, and low recovery rate.

Method used

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  • Method for separating and recovering valuable metals from copper anode slime

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Embodiment 1

[0025] A method for separating and recovering valuable metals from copper anode slime of the present invention, the chemical composition of copper anode slime used is shown in Table 1, and its process flow chart is as follows figure 1 shown, including the following steps:

[0026] Table 1 Chemical composition of copper anode slime

[0027] the element

Au

Ag

PD

Cu

Se

Te

Pb

Bi

W / %

0.25%

5%

5%

13%

5%

1.5%

15%

7%

[0028] (1) Oxidation roasting: After the above-mentioned copper anode slime is roughly crushed, put them into material boxes (thickness: 5 cm) in batches, and send them into the oxidation tunnel kiln for oxidation roasting under sufficient air conditions, and the roasting temperature is 650 °C ℃, heat preservation for 8 hours to completely oxidize the copper anode slime. After exiting the kiln, primary soot and roasted products are obtained;

[0029] Pass the primary soot through the ...

Embodiment 2

[0038]A method for separating and recovering valuable metals from copper anode slime of the present invention, the chemical composition of copper anode slime used is shown in Table 1, and its process flow chart is as follows figure 1 shown, including the following steps:

[0039] Table 1 Chemical composition of copper anode slime

[0040] the element

Au

Ag

PD

Cu

Se

Te

Pb

Bi

3 --> W / %

0.3%

8%

4.5

10%

3%

1.0%

10%

9%

[0041] (1) Oxidation roasting: After the above-mentioned copper anode slime is roughly crushed, put them into material boxes (thickness: 5 cm) in batches, and send them into the oxidation tunnel kiln for oxidation roasting under sufficient air conditions, and the roasting temperature is 680 ℃, heat preservation for 8 hours to completely oxidize the copper anode slime. After exiting the kiln, primary soot and roasted products are obtained;

[0042] Pass the primary soot through t...

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Abstract

The invention discloses a method for separating and recovering valuable metals from copper anode slime. The method comprises the following steps: (1) the copper anode slime is subjected to oxidizing roasting, and primary dust and a roasting product are obtained; selenium is recovered from the primary dust, and secondary dust and crude selenium powder are obtained; (2) the roasting product is broken and added to a reactor, acid is added for acid leaching, an oxidizing agent is added continuously in an acid leaching process, acid leached residues and an acid leached liquid are obtained, and silver and copper are recovered from the acid leached liquid; (3) alkali is added to the acid leached residues for alkaline leaching, sodium cyanide and an ore selecting agent are added simultaneously, alkaline leached residues and an alkaline leached liquid are obtained, the valuable metals are recovered from the alkaline leached liquid, and a lead bismuth alloy and heavy metals are recovered from the alkaline leached residues. The method has the advantages of short process flow, low investment, short time, fast effect taking, high comprehensive recovery rate, high technical-economic indicators and high metal recovery rate.

Description

technical field [0001] The invention relates to a method for recovering valuable metals, in particular to a method for separating and recovering valuable metals from copper anode slime. Background technique [0002] Copper anode slime is a by-product produced during the copper electrolytic refining process. It is composed of various substances that are insoluble in the electrolyte during the electrolytic refining process of copper anode slime, and its composition mainly depends on the composition of copper anode slime, casting quality and electrolysis technical conditions. It usually contains Au, Ag, Cu, Pb, Se, Te, As, Sb, Bi, Ni, Fe, S, Sn, SiO 2 、Al 2 o 3 and platinum group metals. The color of anode mud containing gold and silver is grayish black, and the particle size is usually 0.074-0.147mm (100 mesh-200 mesh). [0003] The material composition of copper anode slime is relatively complex, and various metals exist in various forms. Copper anode slime metal copper ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B11/00C22B15/00C22B13/00C22B30/06C01B19/02
CPCC01B19/02C22B7/001C22B7/007C22B7/008C22B11/042C22B13/045C22B15/0071C22B30/06Y02P10/20
Inventor 曹明华
Owner 郴州百一环保高新材料有限公司
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