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A kind of refining method that improves indium recovery rate

A recovery rate and indium slag technology, which is applied in the field of refining to improve the recovery rate of indium, can solve environmental pollution and other problems, and achieve the effects of reducing environmental pollution, simple operation, and high recovery rate

Active Publication Date: 2019-12-20
苏州精美科光电材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Secondly, the process of purifying indium from raw slag requires the use of chemical steps such as acid hydrolysis and solvent extraction, which can easily cause environmental pollution

Method used

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  • A kind of refining method that improves indium recovery rate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of refining method that improves indium recovery rate, comprises the following steps:

[0023] S1. Prepare a stainless steel drum with a diameter of 290mm and a height of about 340. Drill a hole with a diameter of 4 on the outer edge of the bottom of the stainless steel drum. The periphery of the hole needs to be polished to make it smooth and burr-free;

[0024] S2. Seal the hole at the bottom of the stainless steel drum, and use tin foil and high-temperature tape to seal the hole;

[0025] S3. put the indium slag into the stainless steel drum after weighing, the quality of the indium slag is 8Kg;

[0026] S4. Put the carbon powder into the drum after weighing. The quality of the carbon powder is 2% of the mass of the indium slag, that is, 160g. Fully stir the carbon powder and the indium slag at a stirring speed of 30rpm;

[0027] S5. Heating to 190°C, when the indium slag is in a liquid state, weigh the carbon powder and put it into the drum. The quality of t...

Embodiment 2

[0031] A kind of refining method that improves indium recovery rate, comprises the following steps:

[0032] S1. Prepare a stainless steel drum with a diameter of 300mm and a height of about 350mm. Drill a hole with a diameter of 5mm on the outer edge of the bottom of the stainless steel drum. The periphery of the hole needs to be polished to make it smooth and free of burrs;

[0033] S2. Seal the hole at the bottom of the stainless steel drum, and use tin foil and high-temperature tape to seal the hole;

[0034] S3. put the indium slag into the stainless steel drum after weighing, the quality of the indium slag is 8Kg;

[0035] S4. Put the carbon powder into the drum after weighing. The quality of the carbon powder is 2% of the mass of the indium slag, that is, 160g. Fully stir the carbon powder and the indium slag at a stirring speed of 35rpm;

[0036] S5. Heating to 200°C, when the indium slag is in a liquid state, weigh the carbon powder and put it into the drum. The qual...

Embodiment 3

[0040] A kind of refining method that improves indium recovery rate, comprises the following steps:

[0041] S1. Prepare a stainless steel drum with a diameter of 310mm and a height of about 360mm. Drill a hole with a diameter of 6mm on the outer edge of the bottom of the stainless steel drum. The periphery of the hole needs to be polished to make it smooth and burr-free;

[0042] S2. Seal the hole at the bottom of the stainless steel drum, and use tin foil and high-temperature tape to seal the hole;

[0043] S3. put the indium slag into the stainless steel drum after weighing, the quality of the indium slag is 8Kg;

[0044] S4. Put the carbon powder into the drum after weighing. The quality of the carbon powder is 2% of the mass of the indium slag, that is, 160g. Fully stir the carbon powder and the indium slag at a stirring speed of 40rpm;

[0045] S5. Heating to 210°C, when the indium slag is in a liquid state, weigh the carbon powder and put it into the drum. The quality ...

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Abstract

The invention provides an extraction method for improving the indium recovery rate. The method comprises the following steps: preparing a stainless steel drum, and drilling holes in the outer rim of the bottom of the stainless steel drum; blocking the holes in the bottom of the stainless steel drum; weighing indium residues, and putting into the stainless steel drum; weighing carbon powder which is 2 percent of the mass of the indium residues into the drum, and sufficiently stirring the carbon powder and the indium residues; heating, weighing the carbon powder which is 2 percent of the mass ofthe indium residues and putting into the drum when the indium residues are in a liquid state, sufficiently stirring, spraying a proper amount of clear water, and instantly covering a stainless steeldrum cover; constantly heating, unblocking the holes in the bottom of the stainless steel drum, draining the molten indium liquid from holes in the bottom, and collecting for the first time; and keeping on heating after the indium liquid is drained off, increasing the temperature to make the carbon powder react sufficiently, and draining the molten indium liquid from the holes in the bottom for second collection. The method is simple in operation and does not use chemicals, so that environmental pollution is reduced, and the recovery rate is high.

Description

technical field [0001] The invention relates to the field of material recovery, in particular to a refining method for increasing the recovery rate of indium. Background technique [0002] Indium is easily oxidized to indium oxide in a high-temperature aerobic environment after the tube target is bonded and used through high-frequency vibration and refinement of ultrasonic equipment, and the oxidation rate will be between 15% and 25%. Therefore, how to effectively Recycling is a major event of the company's energy conservation and environmental protection, and it is also an important factor affecting the company's environment. [0003] First of all, indium raw materials are relatively expensive, and effective recycling of indium ingots can reduce the company's production costs and enhance the company's market competitiveness. [0004] Secondly, the process of purifying indium from raw slag requires chemical steps such as acid hydrolysis and solvent extraction, which easily ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B5/10C22B58/00
CPCC22B5/10C22B7/001C22B58/00Y02P10/20
Inventor 陈江伟何凌男
Owner 苏州精美科光电材料有限公司