Method for extracting indium and zinc from high-iron indium-containing zinc calcine and preparing iron oxide

An iron indium zinc and iron oxide technology, which is applied in the fields of extracting indium zinc and preparing iron oxide, can solve the problems that iron cannot be used as a resource, and the recovery rate of indium is low, and achieves easy resource utilization, improved leaching performance, and iron The effect of high slag grade

Inactive Publication Date: 2012-07-11
广西冶金研究院有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Solve the problems of low recovery rate of indium and non-resource utilizatio

Method used

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  • Method for extracting indium and zinc from high-iron indium-containing zinc calcine and preparing iron oxide
  • Method for extracting indium and zinc from high-iron indium-containing zinc calcine and preparing iron oxide
  • Method for extracting indium and zinc from high-iron indium-containing zinc calcine and preparing iron oxide

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Example Embodiment

[0025] Example 1

[0026] The method of the present invention for extracting indium zinc from iron-containing indium zinc calcine and preparing iron oxide is carried out according to the following steps:

[0027] 1. The high-iron zinc calcine containing 53.54% Zn, 19.42% Fe, and In 0.092% is reduced in contact with CO in a rotary kiln. The reduction temperature is 870~900℃. Nitrogen containing 20% ​​carbon monoxide is introduced, and the excess coefficient is 1.2. Add high-iron indium zinc calcine at 6kg / h, install a lifting plate in the kiln, and rotate the material for 30 minutes in the kiln to discharge the material. The material is reduced to room temperature in the same reducing atmosphere to obtain Fe 2+ 14.96% reduced calcine, its main chemical composition is:

[0028] Zn% Fe%Fe 2+ % In% Reduction rate% Reduced calcine53.5419.4214.960.09277.03

[0029] [0022] 2. Perform neutral leaching of the obtained reduced calcine with sulfuric acid according to the conventional ...

Example Embodiment

[0035] Example 2

[0036] A method for extracting indium zinc from iron-containing indium zinc calcine and preparing iron oxide includes the following steps:

[0037] 1. The high-iron indium zinc calcine containing 50.9% Zn, 20.81% Fe and 0.10% In is reduced in contact with CO in the rotary kiln, and nitrogen containing 10% carbon monoxide is introduced, the excess coefficient is 0.8, the reduction temperature is 770 ~800℃, reduction time 80min, get Fe-containing 2+ 13.88% reduction calcine, reduction rate 66.7%.

[0038] 2. Perform neutral leaching of the obtained reduced calcine with sulfuric acid. The initial acidity of neutral leaching is 120g / L, the ratio of liquid to solid (volume / weight) is 5:1, the end point of neutral leaching is pH 5.4, and the neutral leaching time is 30. min, the neutral leaching solution and the intermediate leaching residue are obtained by filtering. The neutral leaching leaching rate is 75.9% Zn and 53.3% Fe.

[0039] 3. Perform acid leaching of the i...

Example Embodiment

[0044] Example 3

[0045] A method for extracting indium zinc from iron-containing indium zinc calcine and preparing iron oxide includes the following steps:

[0046] 1. The high-iron zinc calcine containing 53.2% Zn, 18.98% Fe, and In0.093% is reduced in contact with CO in the rotary kiln, and nitrogen containing 30% carbon monoxide is introduced. The excess coefficient is 2, the reduction temperature is 700~730. ℃, reduction time 60min, get Fe-containing 2+ 15.21% reduction calcine, reduction rate 80.1%.

[0047] 2. Perform neutral leaching of the obtained reduced calcine with sulfuric acid. The initial acidity of neutral leaching is 100g / L, the ratio of liquid to solid (volume / weight) is 5:1, and the end point is pH 5.4. The neutral leaching solution and intermediate leaching are obtained by filtration. Slag, the leaching rate of neutral leaching Zn is 69.38%, and iron is 55.8%.

[0048] 3. Carry out the acid leaching of the intermediate leaching residue, the initial acidity of t...

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Abstract

The invention relates to a method for extracting indium and zinc from high-iron indium-containing zinc calcine and preparing iron oxide. A zinc ferrite structure in the high-iron indium-containing zinc calcine is damaged by reduction roasting, elements such as zinc, iron and indium in the reduced calcine are obtained by neutral leaching and acid leaching, indium-rich slag is obtained by neutralization for precipitating indium, the iron grade of slag obtained by removing iron from hematite under high pressure is high, an industrial iron oxide product can be obtained by acid washing and roasting, and liquid obtained after the iron is removed can be directly purified and electrolyzed after being neutralized by smoke. A technical route of maximally extracting base metal such as the indium, the zinc and the like and recycling associated iron minerals simultaneously is provided, and the problems that the recovery rate of the indium is low and the iron cannot be recycled in the process of smelting a high-iron indium-containing zinc concentrate at present are solved; and a clean production technology which combines effective extraction of the base metal with effective utilization of associated iron is provided for treating the indium, the zinc and other high-iron non-ferrous metal materials.

Description

technical field [0001] The invention relates to a method for extracting indium and zinc from calcine containing high iron indium and zinc and preparing iron oxide, which belongs to the technical field of mineral processing. Background technique [0002] my country's zinc smelters have carried out experimental research on processes such as hot acid leaching-jarosite method, goethite method, hematite method, and spray iron removal method. The hematite removal method is limited by the level of equipment manufacturing. In addition, several other processes have been applied in production. For example, Baiyin Northwest Smelter adopts hot acid leaching-jarosite method, Chifeng Smelter adopts ammonium ferrite method, and Wenzhou Smelter adopts spray iron removal method, etc. The hot acid leaching process has a high leaching rate and can obtain lead-silver slag with low zinc and indium content. However, the jarosite slag contains soluble ions, which is easy to cause environmental pol...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B3/08C22B3/44C22B19/00C22B58/00C01G49/06
CPCY02P10/20
Inventor 刘晨黄进文何航军陈科云罗思强柯剑华谢营邦李浩铭陶然
Owner 广西冶金研究院有限公司
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