Method for deironing through oxygen

An oxygen and iron slag technology, applied in the field of hydrometallurgy, can solve the problems of large metal loss, uneven oxygen distribution, low iron content in iron slag, etc., and achieve the effect of reducing metal loss

Inactive Publication Date: 2018-11-02
南丹县南方有色金属有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production process, due to the low oxygen concentration and uneven oxygen distribution, the oxygen utilization rate is only about 60%, and the iron removal rate is about 80%. At the same time, the iron slag contains low iron, more than 15% zinc and 1 % above, the metal loss is large

Method used

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  • Method for deironing through oxygen

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Effect test

Embodiment 1

[0017] A method for removing iron from oxygen, including the following steps:

[0018] (1) Using calcine to control the pH value of the zinc-copper mixed solution in the reactor at 2.9;

[0019] (2) The stirring shaft is set vertically with the reactor, and oxygen is transported to the bottom of the reactor through the center of the stirring shaft, and the oxygen and the zinc-copper mixed solution are fully mixed by the stirring shear force;

[0020] (3) The product obtained in step (2) is passed to an iron removing thickener for precipitation separation, and the solution and iron slag are obtained by filtration and separation.

Embodiment 2

[0022] A method for removing iron from oxygen, including the following steps:

[0023] (1) Use calcine to control the pH value of the zinc-copper mixed solution in the reactor at 3;

[0024] (2) The stirring shaft is set vertically with the reactor, and oxygen is transported to the bottom of the reactor through the center of the stirring shaft, and the oxygen and the zinc-copper mixed solution are fully mixed by the stirring shear force;

[0025] (3) The product obtained in step (2) is passed to an iron removing thickener for precipitation separation, and the solution and iron slag are obtained by filtration and separation.

Embodiment 3

[0027] A method for removing iron from oxygen, including the following steps:

[0028] (1) Use calcine to control the pH value of the zinc-copper mixed solution in the reactor at 3.1;

[0029] (2) The stirring shaft is set vertically with the reactor, and oxygen is transported to the bottom of the reactor through the center of the stirring shaft, and the oxygen and the zinc-copper mixed solution are fully mixed by the stirring shear force;

[0030] (3) The product obtained in step (2) is passed to an iron removing thickener for precipitation separation, and the solution and iron slag are obtained by filtration and separation.

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Abstract

The invention discloses a method for deironing through oxygen, and relates to the technical field of hydrometallurgy. The method for deironing through oxygen comprises the steps of (1) controlling pHof a zinc-copper mixed solution in a reactor to be 2.9-3.2; (2) conveying the oxygen to the bottom part of the reactor through a stirring shaft center; and fully mixing the oxygen and the zinc-coppermixed solution through stirring and shearing force; and (3) filtering and separating the product obtained in step (2) to obtain a solution and an iron slag. With the adoption of the method for deironing through the oxygen, the oxygen concentration can be increased to be more than 75%; the oxygen utilization rate is increased to be more than 90%; the removing rate of germanium, arsenic, antimony and fluorine in the solution is beyond 80%; the deironing efficiency is more than 90%; and the iron slag contains less than 8% of zinc and less than 0.5% of copper.

Description

Technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to a method for removing iron from oxygen. Background technique [0002] Iron removal is an important subject of wet zinc smelting. Roasting, leaching, purification, electrowinning and casting are basically the same in wet zinc smelting. The only difference is that different iron removal methods are used to produce various wet zinc smelting processes. The iron removal process of wet zinc smelting can be summarized into two categories: the first category is the fire treatment leaching slag process represented by the conventional method, which features only one type of waste slag (iron-containing), and the slag is solidified by the fire method. Discarded slag is easy to store and sell, but there are problems such as low zinc leaching rate, high energy consumption, and low-concentration SO2 flue gas that needs to be treated. Another type of wet treatment leaching slag process repres...

Claims

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Application Information

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IPC IPC(8): C22B19/20C22B3/44
CPCC22B3/44C22B19/26Y02P10/20
Inventor 周南方莫毅施贵添唐仲开韦振仁
Owner 南丹县南方有色金属有限责任公司
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