Method of recycling zinc, manganese, lead and silver from zinc electrowinning anode mud

A technology of anode slime and zinc electrowinning, which is applied in the field of lead and silver, recovery of valuable metal zinc, recovery of zinc and manganese, can solve the problem of hydrogen peroxide volatility, strong corrosion, difficulties in production operation and storage, large amount of hydrogen peroxide, etc. problems, to achieve the effects of wide sources of reducing agents, improved comprehensive recovery and utilization efficiency, and easy operation

Active Publication Date: 2014-06-18
HUNAN HERMES SAFE ENVIRONMENT PROTECTION SCI
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, on the one hand, the consumption of hydrogen peroxide is large, the price is high, and the production cost is relatively high;

Method used

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  • Method of recycling zinc, manganese, lead and silver from zinc electrowinning anode mud

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The composition of zinc electrowinning anode mud is shown in Table 1.

[0022] Table 1 Composition of zinc electrowinning anode mud

[0023] Element

Zn

Mn

Pb

Ag

Content (%)

2.44

24.31

9.84

639g / t

[0024] Add block, flake and slurry zinc electrodeposition anode mud and slag washing water to the ball mill. The ratio of zinc electrodeposition anode to slag washing water is 1:3, the ball milling time is 2h, and the anode mud size after ball milling is 180 mesh , Filter to obtain a solution containing 9.31g / L of zinc, and the filtrate is used as the raw material of the zinc smelting system. Then the filter residue was rinsed according to the solid-liquid ratio of 1:3. The rinsing time was 1h. After filtration, the zinc concentration in the washing residue was 0.88g / L, and the zinc content in the residue was 0.092%.

[0025] Add the rinsed filter residue to a reaction kettle equipped with sulfuric acid solution, and control the mass ratio of filter residue to sul...

Embodiment 2

[0030] The raw material composition is the same as in Example 1.

[0031] Add block, flake and slurry zinc electrodeposition anode mud and slag washing water to the ball mill, the ratio of zinc electrodeposition anode to slag washing water is 1:5.5, the ball milling time is 1h, and the anode mud size after ball milling is 180 mesh , Filter to obtain a solution containing 6.08g / L of zinc, and the filtrate is used as the raw material of the zinc smelting system. Then according to the solid-liquid ratio of 1:5, the filter residue was rinsed. The rinsing time was 1h. After filtration, the zinc concentration in the washing residue was 0.61g / L, and the zinc content in the residue was 0.073%.

[0032] Add the rinsed filter residue to a reaction kettle equipped with sulfuric acid solution, and control the mass ratio of filter residue to sulfuric acid solution at 1:4, and the pH value of the sulfuric acid solution at 1, and slowly introduce sulfur dioxide gas during the stirring reaction. ...

Embodiment 3

[0035] The raw material composition is the same as in Example 1.

[0036] Add block, flake and slurry zinc electrodeposition anode mud and slag washing water to the ball mill, the ratio of zinc electrodeposition anode to slag washing water is 1:2, the ball milling time is 3h, and the anode mud size after ball milling is 180 mesh , Filter to obtain a solution containing 11.1g / L of zinc, and the filtrate is used as the raw material of the zinc smelting system. Then according to the solid-liquid ratio of 1:2, the filter residue was rinsed. The rinsing time was 1h. After filtration, the zinc concentration in the washing residue was 1.21g / L, and the zinc content in the residue was 0.44%.

[0037] Add the rinsed filter residue to a reaction kettle equipped with sulfuric acid solution, and control the mass ratio of filter residue to sulfuric acid solution at 1:4, and the pH value of the sulfuric acid solution at 1, and slowly introduce sulfur dioxide gas during the stirring reaction. Sul...

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Abstract

The invention discloses a method of recycling zinc, manganese, lead and silver from zinc electrowinning anode mud. The method comprises the following steps of: after carrying out wet ball grinding on the zinc electrowinning anode mud, filtering, wherein filtrate is taken as a raw material for a zinc smelting system; mixing filter residues and acidic solution, adding a reducing agent to carry out reduction reaction, leaching manganese, filtering to obtain leaching liquid and leaching slag, purifying the leaching liquid, and preparing manganese dioxide through an electrolysis method; and recycling lead and silver with the leaching slag as high-lead slag and a raw material of a lead smelting system. The method, provided by the invention, has the characteristics of less investment, simple process, low cost, easiness in operation and the like; the whole process is a green metallurgical process flow, and is environmental-friendly, the comprehensive recovery and utilization efficiency of resources can be effectively improved, the battery-level manganese dioxide obtained by electrolysis is taken as a new energy material so as to be beneficial for environmental protection and high value-added utilization of resources. The method is easy to realize large-scale industrial application.

Description

Technical field [0001] The invention discloses a method for recovering zinc, manganese, lead and silver from zinc electrodeposition anode slime, in particular to a method that uses zinc electrodeposition anode slime as a raw material and adopts an efficient and green full wet process to recover valuable Methods of metal zinc, manganese, lead and silver. It belongs to the technical field of resource recycling. Background technique [0002] A large amount of anode slime is produced at the anode during the electrowinning process of a hydro-zinc smelter. The main components of the anode slime are manganese, lead and strontium, and also contain a small amount of silver. Lead and silver are valuable resources that can be recycled and utilized. At present, there are two ways to deal with zinc electrowinning anode mud. One is simple accumulation treatment, which causes heavy metal pollution and takes up land resources; the other is recycling. The anode slime is treated in a recycling m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B19/30C22B47/00C22B13/00C22B11/00
CPCY02P10/20
Inventor 陈海清蒋光辉刘俊
Owner HUNAN HERMES SAFE ENVIRONMENT PROTECTION SCI
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