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

A technology of anode slime and zinc electrowinning, applied in the field of recovering valuable metals zinc, lead and silver, manganese, and zinc, which can solve the problem of the volatility, strong corrosiveness of hydrogen peroxide, difficulties in production, operation and storage, and large amount of hydrogen peroxide, etc. problems, to achieve the effect of wide source of reducing agent, improved comprehensive recovery and utilization efficiency, and easy operation

Active Publication Date: 2013-02-06
HUNAN HERMES SAFE ENVIRONMENT PROTECTION SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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 slime is shown in Table 1.

[0022] Table 1 Composition of zinc electrowinning anode slime

[0023] the element

Zn

mn

Pb

Ag

Content (%)

2.44

24.31

9.84

639g / t

[0024] Add block, flake and slurry zinc electrowinning anode slime and slag washing water to the ball mill, the ratio of zinc electrowinning anode to slag washing water is 1:3, the ball milling time is 2 hours, and the particle size of the anode slime after ball milling is 180 mesh , filtered to obtain a solution containing 9.31g / L of zinc, and the filtrate was used as a raw material for the zinc smelting system. Then, according to the solid-to-liquid ratio of 1:3, rinse the filter residue for 1 hour. After filtering, the zinc concentration in the residue washing water is 0.88g / L, and the zinc content in the residue is 0.092%.

[0025] Add the filter residue after rinsing into the reaction kettle equipped ...

Embodiment 2

[0030] Raw material composition is with example 1.

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

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

Embodiment 3

[0035] Raw material composition is with example 1.

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

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

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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 electrowinning anode slime, in particular to a method for recovering valuable zinc electrowinning anode slime through an efficient and green all-wet process using zinc electrowinning anode slime as raw material. Methods for the metals zinc, manganese, lead and silver. The utility model belongs to the technical field of resource recycling. Background technique [0002] A large amount of anode slime will be produced in the anode during the electrowinning process of the wet zinc smelting plant. The main components of the anode slime are manganese, lead and strontium, and also contain a small amount of silver. The lead and silver are valuable resources that can be recycled and utilized. At present, there are two ways to deal with zinc electrowinning anode slime, one is simple stacking treatment, which causes heavy metal pollution and occupies land resources; the oth...

Claims

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Application Information

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Patent Type & Authority Applications(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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