A method for recovering indium and zinc from indium-containing zinc oxide soot

A technology of zinc oxide and soot, applied in the direction of improving process efficiency, etc., can solve the problems of reduced indium extraction rate, low total recovery rate, interference, etc., and achieve the effects of process optimization, strong adaptability, and reduced output

Active Publication Date: 2016-10-05
岷山环能高科股份公司
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Problems solved by technology

[0005] (1) The leaching rate of indium using the existing leaching method is low, about 70%-80%, making the total recovery rate of indium in the comprehensive recovery process lower than 60%
[0006] (2) Due to the complex composition of secondary zinc oxide, there are many types of metal elements contained, which makes separation difficult
[0007] (3) Existing indium extractants still have great deficiencies in actual production
For example, the extractant has a strong complexing ability with antimony, which reduces the ability to extract indium, reduces the extraction rate of indium, and causes serious interference
[0008] (4) Acid leaching slag and indium raffinate have the problems of large discharge and difficult recovery. Most existing enterprises discharge directly to the outside world, which will seriously pollute and damage the ecological environment

Method used

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  • A method for recovering indium and zinc from indium-containing zinc oxide soot
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  • A method for recovering indium and zinc from indium-containing zinc oxide soot

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with specific embodiments.

[0036] A method for recovering indium and zinc from indium-containing zinc oxide soot, comprising the steps of:

[0037] Step 1, Indium-containing zinc oxide soot analysis

[0038] The weight ratio of main components in indium-containing zinc oxide soot is: Zn 30-60%, Pb 8-20%, F 0.1-1%, Cl 0.5-3%, In 0.01-0.2%;

[0039] Step 2, high temperature volatile enrichment

[0040] The indium-containing zinc oxide soot in step 1 is volatilized in a high-temperature roaster at a temperature of 1000°C to produce high-indium soot and zinc calcine. The temperature of the high-temperature roaster is adjusted according to the actual situation. The standard is capable of producing sorted out treble soot and zinc calcined as standard. The weight contents of zinc, lead and indium in the high indium soot are respectively: Zn 5-15%, Pb 10-20%, In 0.07-0.3%; the weight content of zinc in zi...

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Abstract

The invention relates to the technical field of non-ferrous metal metallurgy, in particular to a method for carrying out indium and zinc recycling on indium zinc oxide soot. The method comprises the first step of analyzing the indium zinc oxide soot, the second step of carrying out high-temperature volatilization gathering, the third step of leaching high-indium soot out, the fourth step of leaching neutral leaching slag out and the fifth step of extracting indium from an acid leaching agent. The method is high in technology pertinence. The method is utilized for recycling indium, zinc, lead and other valuable metal in the indium zinc oxide soot, and a high recycling rate of the indium, zinc and lead can be ensured.

Description

technical field [0001] The invention relates to the technical field of nonferrous metal smelting, in particular to a method for recovering indium and zinc from indium-containing zinc oxide soot. Background technique [0002] Indium is a rare element with great industrial mining value. There is no independent deposit in the earth's crust. It is mostly associated with non-ferrous metals such as lead and zinc and minerals such as iron, and its content is extremely low and widely distributed. As a multi-purpose metal, indium is widely used in high-tech fields such as electronic computers, optoelectronics, energy, aerospace, national defense, nuclear industry and modern information industry, such as electronic components, liquid crystal display screens, low melting point alloys, fine Chemical additives and atomic energy. [0003] my country's indium mainly comes from intermediate products in the smelting process of non-ferrous metals such as zinc and lead, among which the most i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/02C22B19/30C22B58/00
CPCY02P10/20
Inventor 何秋安何占源何志军何志刚李全清孙富有刘维
Owner 岷山环能高科股份公司
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