Method for preparing highly pure indium micropowder by using industrial indium ingots

A high-purity, indium ingot technology, applied in the field of non-ferrous metal metallurgy and new materials, can solve the problems of single terminal product and low industrial added value, and achieve the effect of simplifying technical links, low cost, and expanding application fields

Inactive Publication Date: 2015-07-22
QINGHAI UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Qinghai Western Indium Industry Co., Ltd. has realized the industrialized production of indium ingots by using the waste residue of lead-zinc mines, which has a certain foundation in the comprehensive utilization of resources, but the company currently has the embarrassing situation of single end products and low industrial added value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare the electrolyte solution according to the requirements of the electrolytic solution, and the required medicines and dosage are as follows: 90g L -1 InSO 4 , 85g·L -1 KCl, 0.4g L -1 Gelatin, 1mol L -1 dilute H 2 SO 4 , pH value is 1.5, 5g L -1 Polyvinylpyrrolidone, the temperature is 40 ℃, put the prepared solution into the electrolytic cell and keep the temperature constant in the constant temperature water bath.

[0029] The titanium plate is used as the cathode, and the thick indium plate is used as the anode, and they are placed in the electrolytic cell according to the distance between the same poles of 4cm; the electrolysis is performed with a DC stabilized power supply, and the current density is controlled at 40A m 2 between.

[0030] After the powder adapter at the bottom of the cathode plate is taken out, the liquid-solid separation is carried out by suction filtration, and washed with absolute ethanol; the filter cake obtained after suction fi...

Embodiment 2

[0033] Prepare the electrolyte solution according to the requirements of the electrolytic solution, and the required medicines and dosage are as follows: 100g L -1 InSO 4 , 100g·L -1 KCl, 0.5g L -1 Gelatin, 1mol L -1 dilute H 2 SO 4 , pH value is 2, 8g·L -1 Polyvinylpyrrolidone, the temperature is 40 ℃, put the prepared solution into the electrolytic cell and keep the temperature constant in the constant temperature water bath.

[0034] The titanium plate is used as the cathode, and the thick indium plate is used as the anode. They are placed in the electrolytic cell according to the distance between the same poles of 4.5 cm; electrolyze with a DC stabilized power supply, and the current density is controlled at 60A m 2 between.

[0035] After the powder adapter at the bottom of the cathode plate is taken out, the liquid-solid separation is carried out by suction filtration, and washed with absolute ethanol; the filter cake obtained after suction filtration is dried b...

Embodiment 3

[0038] Prepare the electrolyte solution according to the requirements of the electrolytic solution, and the required medicines and dosage are as follows: 110g L-1 InSO 4 , 115g·L -1 KCl, 0.6g L -1 Gelatin, 1mol L -1 dilute H 2 SO 4 , pH value is 2.5, 10g L -1 Polyvinylpyrrolidone, the temperature is 40 ℃, put the prepared solution into the electrolytic cell and keep the temperature constant in the constant temperature water bath.

[0039] The titanium plate is used as the cathode, and the thick indium plate is used as the anode, and they are placed in the electrolytic cell according to the distance between the same poles of 5 cm; the electrolysis is performed with a DC stabilized power supply, and the current density is controlled at 80A m 2 between.

[0040] After the powder adapter at the bottom of the cathode plate is taken out, the liquid-solid separation is carried out by suction filtration, and washed with absolute ethanol; the filter cake obtained after suction ...

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Abstract

The invention belongs to the fields of nonferrous metal metallurgy and new materials, and relates to a method for preparing highly pure indium micropowder by using industrial indium ingots. The preparation method comprises the following steps: 1, preparing an electrolyte solution, and purifying the electrolyte solution; 2, selecting an electrolytic tank; 3, adjusting electrolytic technological parameters; 4, carrying out a powder dispersion technology; and 5, carrying out a powder separating and drying technology: taking down a powder carrying container below the cathode of the electrolytic tank, separating by using a pumping filtration technology, washing by using anhydrous ethanol during pumping filtration, and drying in nitrogen environment due to activity and easy atmospheric oxidation of indium. The micropowder prepared through the method can be used in the field of LED plating, and can also be used in the industries of semiconductors and other electronic products.

Description

technical field [0001] The invention relates to the technology in the field of non-ferrous metal metallurgy and new materials, and relates to a method for preparing high-purity indium micropowder by using industrial indium ingots. Background technique [0002] Indium is a silver-white shiny metal, soft, has good plasticity and ductility, and can be deformed almost arbitrarily. Melting point 156.6°C, density 7.362g cm 3 . The distribution of indium in the earth's crust is relatively small and scattered. So far, no single deposit of indium has been found. It is associated with zinc, tin and other minerals in trace amounts. When its content reaches a few parts per 100,000, it has industrial production value, so it is listed as a rare metal. At present, indium is attracting more and more people's attention as it will be used as a national strategic reserve resource. [0003] High-purity indium powder is widely used in industry and life: such as ITO targets, III-V semiconduct...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): C25C5/02
Inventor王晓民南辉曹海莲王金颖邱彦星王丙军
OwnerQINGHAI UNIVERSITY