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Leaching method of complex zinc calcined ores

A zinc roasting and leaching technology is applied in the field of metallurgy, which can solve the problems of large amount of iron slag, unsatisfactory quality of middle and supernatant, and difficulty in controlling the ratio of iron and arsenic in leaching solution, so as to achieve the effect of low power consumption

Active Publication Date: 2014-10-29
蒙自矿冶有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems existing in the prior art, the present invention provides a method for leaching complex zinc roasted ores, which solves the problems of iron secondary sedimentation, large amount of slag and a large amount of other impurities leached during leaching of high-iron and high-arsenic roasted ores. problem, and solve the problems of low-iron and high-arsenic roasted ore leaching, the iron-arsenic ratio of the leaching solution is difficult to control, the quality of the medium and supernatant cannot meet the requirements, and the problems of electrolytic burning plates are achieved, so as to achieve the purpose of efficient recovery of zinc and removal of impurities

Method used

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  • Leaching method of complex zinc calcined ores
  • Leaching method of complex zinc calcined ores
  • Leaching method of complex zinc calcined ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: as figure 1 , 2 The leaching method of the high iron and high arsenic zinc roasted ore shown is as follows:

[0028] (1) Mix the electrolytic waste liquid and the hydrometallurgy mixed liquid according to the mass ratio of 2:1 and place it in 80M 3 In the oxidation tank, and add manganese powder in the oxidation tank, so that the acid in the mixed solution is 60g / L, Fe 2+ <0.01g / L;

[0029] (2) Put the oxidized solution in step (1) in the first leaching tank and add high iron and high arsenic zinc roasted ore. The amount of high iron and high arsenic zinc roasted ore added is calculated based on the concentration of acid in the solution as 20g / L. The pulp in the first leaching tank enters the second leaching tank, and high-iron, high-arsenic and zinc roasted ore is added into the second leaching tank. The amount of high-iron, high-arsenic and zinc roasted ore added is calculated on the basis that the pH value of the pulp at the outlet of the second leac...

Embodiment 2

[0031] Embodiment 2: as image 3 The leaching method of the shown low-iron and high-arsenic zinc roasted ore is as follows:

[0032] (1) Mix the electrolytic waste solution and the mixed solution at a ratio of 3:1, pump them into the oxidation tank, and add electrolytic anode slime to the oxidation tank, so that the acid in the mixed solution after oxidation is 80 g / L, Fe 2+ <0.01g / L;

[0033] (2) Put the oxidized solution in step (1) in the first leaching tank and add low iron and high arsenic roasted ore. The acidity of the first tank can be guaranteed to ensure the leaching rate of zinc. The pulp in the first leaching tank enters the second leaching tank, and low-iron and high-arsenic roasted ore is added in the second leaching tank. Low-iron and high-arsenic roasted ore The amount of addition is calculated based on the pH value of the pulp at the outlet of the second leaching tank is 2.5, and the pulp in the second leaching tank enters the third leaching tank for acid l...

Embodiment 3

[0035] Embodiment 3: the leaching method of high iron and high arsenic zinc roasted ore, concrete operation is as follows:

[0036] (1) Mix the electrolytic waste liquid and the hydrometallurgy mixed liquid at a mass ratio of 3:1 and place it at 80M 3 In the oxidation tank, and add electrolytic anode slime in the oxidation tank, so that the acid in the mixed solution is 100g / L, Fe 2+ <0.01g / L;

[0037] (2) Put the solution oxidized in step (1) in the first leaching tank and add high iron and high arsenic zinc roasted ore. The pulp in the first leaching tank enters the second leaching tank, and high iron and high arsenic zinc roasted ore is added into the second leaching tank. The amount of high iron and high arsenic zinc roasted ore added is calculated based on the pH value of the pulp at the outlet of the second leaching tank being 2.2. The ore pulp in the second leaching tank enters the two leaching tanks for acid leaching treatment, and the flow rate of the ore pulp durin...

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Abstract

The invention discloses a leaching method of complex zinc calcined ores. In order to solve the problems in the prior art that iron is secondarily settled, a great quantity of slag is generated, other impurities are leached out in a great quantity, the ratio of iron to arsenic in the leaching solution is hard to control, the upper middle clear liquid cannot reach the quality requirement, the plate is burned by electrolysis and the like, the method is used for leaching complex zinc calcined ores by adopting steps of acid leaching and neutralizing to remove impurities, so that the purpose of efficiently recovering zinc and removing impurities is reached. Meanwhile, wastewater and waste materials in the prior art are utilized, so that the emission of wastes is reduced and the production cost is lowered. The method disclosed by the invention is simple to operate and easy in process management, reduces the emission of residues or wastes, effectively recovers valuable metals in the leaching process and can selectively provide high-quality upper middle clear liquid as well.

Description

technical field [0001] The invention relates to a method for leaching complex zinc roasted ore, which belongs to the technical field of metallurgy. Background technique [0002] The existing technologies for the leaching of zinc roasted ore mainly include: conventional leaching, hot acid leaching, etc. However, the conventional leaching process is complicated, the zinc leaching rate is low, and the production cost is high; the hot acid leaching process replaces the acid leaching in the conventional leaching with high temperature and high acid, which improves the zinc leaching rate and reduces the slag rate, but at the same time leads to the same A large number of impurities with a similar activity level to zinc metal are leached out, which affects the removal of impurities and consumes a lot of power. Therefore, for the current complex zinc roasted ore, the defects of the existing technology can be summarized as follows: (1) After the high iron and high arsenic zinc roasted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B19/20
CPCY02P10/20
Inventor 韦勇冯继平吴国钦陈春发韦乃团廖发忠罗森育覃和恒杨伟赵彩英
Owner 蒙自矿冶有限责任公司
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