Method for removing impurities from zinc oxide leachate by using zinc hydrometallurgy purification residues

A technology for hydrometallurgical zinc and zinc oxide, which is applied in the direction of improving process efficiency, can solve problems such as unfavorable economic benefits of enterprises, increased process steps, high operating costs, etc., so as to reduce processing costs, improve economic benefits, and reduce input costs. Effect

Inactive Publication Date: 2017-05-31
HUNAN SHUI KOU SHAN NONFERROUS METALS GRP
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

These methods for removing impurities from zinc sulfate solution all require large investment and high operating costs, and additional process steps need to be added, which is not conducive to improving the economic benefits of enterprises

Method used

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  • Method for removing impurities from zinc oxide leachate by using zinc hydrometallurgy purification residues

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Embodiment 1

[0033] refer to figure 1 , a kind of method of utilizing the zinc oxide purification slag of the present embodiment to remove the impurity in zinc oxide leaching liquid, this method comprises the following steps:

[0034] A method for removing impurities in zinc oxide leaching solution by using zinc hydrometallurgy purification slag, the method comprises the following steps:

[0035] (1) Slurry purification;

[0036] (2) Replacement and impurity removal: Remove impurities, and the elemental zinc in the purification slag undergoes a replacement reaction with the impurities in the zinc oxide leaching solution. The reaction temperature is 70°C, the pH is 5.0, and the reaction time is 1 hour;

[0037] (3) Solid-liquid separation: to obtain replacement liquid and replacement slag.

[0038] The specific operation of step (1) is: the purification residue is slurried with water at a liquid-solid mass ratio of 3:1, and pumped into the zinc oxide leachate reaction tank.

[0039] The ...

Embodiment 2

[0044] refer to figure 1 , a kind of method that utilizes zinc hydrometallurgy purification slag to remove impurity in the zinc oxide leachate of embodiment 2, compared with embodiment 1, there is following difference:

[0045] Replacement and impurity removal: The impurities are removed, and the elemental zinc in the purification slag undergoes a replacement reaction with the impurities in the zinc oxide leaching solution. The reaction temperature is 73°C, the pH is 4.5, and the reaction time is 1 hour.

[0046] The specific operation of step (1) is: the purification residue is slurried with water at a liquid-solid mass ratio of 4:1, and pumped into the zinc oxide leachate reaction tank.

[0047]6t of purified slag, its chemical composition is: Zn 60%, effective Zn 55%, Cd 5%, Cu 3%, As 1%, Ge1%, Ni1%; the purified slag is 3:1 according to the liquid-solid mass ratio Slurry with water, then pump into zinc oxide leaching solution reaction tank; remove impurities, remove impur...

Embodiment 3

[0049] refer to figure 1 , a kind of method that utilizes the zinc oxide purification slag of embodiment 3 to remove impurity in the zinc oxide leaching solution, compare with embodiment 1, there is following difference:

[0050] Replacement and impurity removal: Remove impurities, and the elemental zinc in the purification slag undergoes a replacement reaction with the impurities in the zinc oxide leaching solution. The reaction temperature is 70°C, the pH is 5.0, and the reaction time is 2 hours.

[0051] The specific operation of step (1) is: the purification residue is slurried with water at a liquid-solid mass ratio of 3:1, and pumped into the zinc oxide leachate reaction tank.

[0052] 6t of purified slag, its chemical composition is: Zn 60%, effective Zn 55%, Cd 5%, Cu 3%, As 1%, Ge1%, Ni1%; the purified slag is 4:1 according to the liquid-solid mass ratio Slurry with water, then pump into zinc oxide leaching solution reaction tank; remove impurities, remove impurities...

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Abstract

A method for removing impurities from zinc oxide leachate by using zinc hydrometallurgy purification residues uses an intermediate purification residues as a raw material, and comprises the following steps: 1, slurrying the purification residues; 2, displacing and removing impurities: removing impurities, and carrying out a displacement reaction on simple substance zinc in the purification residues and impurities in zinc oxide leachate at 70-75 DEG C under a pH value of 4.5-5.0 for 1-2 h; and 3, carrying out solid-liquid separation to obtain a displacement liquid and displacement residues. The method has the advantages of realization of open circuit removal of the impurities from the zinc oxide leachate, guaranteeing of the quality of a wet system zinc sulfate solution and increase of the economic benefits of zinc hydrometallurgy under extremely small investment cost and extremely low running cost by using the intermediate produced in the zinc hydrometallurgy system.

Description

technical field [0001] The invention relates to the field of comprehensive recovery and utilization of zinc smelting, in particular to a method for removing impurities in a zinc oxide leaching solution by utilizing zinc purification slag from a wet method. Background technique [0002] In hydro-method zinc smelting enterprises, with the increase of zinc oxide treatment capacity, the impurity of zinc oxide leaching solution will increase, and there will be different degrees of impurity accumulation in the zinc sulfate solution of the wet process system. With the enrichment of impurities, the existing purification It is difficult to remove, and the quality of the new solution is difficult to be guaranteed, resulting in a decline in the quality of the electrolytic zinc. [0003] At present, zinc smelting enterprises adopt the following two methods to remove impurities in order to prevent the high impurities in the zinc oxide leaching solution from affecting the quality of the n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/46C22B19/20
CPCC22B3/46C22B19/26Y02P10/20
Inventor 周丽娟于红卫阳自霖
Owner HUNAN SHUI KOU SHAN NONFERROUS METALS GRP
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