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Method for recovering silver, indium and cadmium from silver-indium-cadmium alloy waste

A technology of cadmium alloy and indium alloy, which is applied in the field of scrap recycling, can solve the problems of difficulty in recycling silver indium cadmium alloy scrap, and achieve the effects of being environmentally friendly, having a high recovery rate and a short recovery process.

Active Publication Date: 2021-06-22
西安诺博尔稀贵金属材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It effectively solves the problem of difficult recycling of silver indium cadmium alloy waste, and has the advantages of short recycling process, environmental friendliness, simple process and high recovery rate

Method used

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  • Method for recovering silver, indium and cadmium from silver-indium-cadmium alloy waste

Examples

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Embodiment 2

[0032] This embodiment provides a method for reclaiming silver, indium, and cadmium from silver-indium-cadmium alloy waste, comprising the following steps:

[0033] Step 1. Put the silver-indium-cadmium alloy waste in a vacuum reaction melting furnace, vacuumize it, and melt it at 1050°C for 2 hours to generate cadmium vapor and silver-indium alloy melt. The cadmium vapor enters the gas phase collection device to obtain cadmium powder, and the silver Indium alloy melt is cast in the mould, obtains the silver-indium alloy that is solid; The described silver-indium-cadmium alloy scrap is placed in the crucible of vacuum reaction melting furnace, and the material of described crucible is graphite, and the power of described vacuum reaction melting furnace is 200kw; the mass content of silver in the silver-indium-cadmium alloy waste is 82%, the mass content of indium is 14%, and the mass content of cadmium is 4%; the particle diameter of the cadmium powder is 5 μm~8 μm; The mass p...

Embodiment 3

[0038] This embodiment provides a method for reclaiming silver, indium, and cadmium from silver-indium-cadmium alloy waste, comprising the following steps:

[0039] Step 1. Put the silver-indium-cadmium alloy waste in a vacuum reaction melting furnace, vacuumize it, and melt it at 1050°C for 2 hours to generate cadmium vapor and silver-indium alloy melt. The cadmium vapor enters the gas phase collection device to obtain cadmium powder, and the silver Indium alloy melt is cast in the mould, obtains the silver-indium alloy that is solid; The described silver-indium-cadmium alloy scrap is placed in the crucible of vacuum reaction melting furnace, and the material of described crucible is graphite, and the power of described vacuum reaction melting furnace is 200kw; the mass content of silver in the silver-indium-cadmium alloy waste is 85%, the mass content of indium is 10%, and the mass content of cadmium is 5%; the particle diameter of the cadmium powder is 5 μm~8 μm; The mass p...

Embodiment 4

[0044] This embodiment provides a method for reclaiming silver, indium, and cadmium from silver-indium-cadmium alloy waste, comprising the following steps:

[0045] Step 1. Put the silver-indium-cadmium alloy waste in a vacuum reaction melting furnace, vacuumize it, and melt it at 1150° C. for 2.5 hours to generate cadmium vapor and silver-indium alloy melt. The cadmium vapor enters the gas phase collection device to obtain cadmium powder. The silver-indium alloy melt is cast in a mold to obtain a solid silver-indium alloy; the silver-indium-cadmium alloy waste is placed in a crucible of a vacuum reaction melting furnace, the material of the crucible is graphite, and the power of the vacuum reaction melting furnace is is 200kw; the mass content of silver in the silver-indium-cadmium alloy waste is 85%, the mass content of indium is 10%, and the mass content of cadmium is 5%; the particle diameter of the cadmium powder is 8 μm~9 μm; in the present embodiment The mass purity of ...

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Abstract

The invention discloses a method for recovering silver, indium and cadmium from silver-indium-cadmium alloy waste. The method comprises the following steps: I, smelting the silver-indium-cadmium alloy waste under a vacuum condition to obtain cadmium powder and silver-indium alloy; II, carrying out a leaching reaction on the silver-indium alloy and dilute sulfuric acid and filtering to obtain solid residues and leachate; III, eluting the solid residues through acidic deionized water, then washing the solid residues to be neutral through deionized water, and drying to obtain silver powder; and IV, diluting the leachate, and putting an aluminum plate into the diluted leachate for a replacement reaction to obtain sponge indium. Through adoption of the method, the mass purity of the recycled silver powder is not smaller than 99%, the yield of the silver powder is larger than 99.6%, the mass purity of the recycled sponge indium is not smaller than 99%, the yield of the sponge indium is larger than 99%, the mass purity of the recycled cadmium powder is not smaller than 99%, and the yield of the cadmium powder is larger than 98%. The recycled silver, indium and cadmium can be directly used for preparing a silver-indium-cadmium alloy material.

Description

technical field [0001] The invention belongs to the technical field of waste recycling, and in particular relates to a method for recycling silver, indium and cadmium from silver-indium-cadmium alloy waste. Background technique [0002] Silver-indium-cadmium alloys are mainly used as nuclear-level key control materials. They are mainly used to absorb neutrons, change the number of neutrons in the core, and realize the control of nuclear fission chain reactions. [0003] A large amount of waste will be generated during the smelting and processing of silver indium cadmium alloy, and the current recycling process of silver indium cadmium alloy waste is mainly hydrometallurgy, that is, silver indium cadmium alloy waste is cast into anodes, and silver is recovered through electrolytic refining. Then, because the mass fraction of silver in the anode made of silver indium cadmium alloy is about 80%, as the electrolysis proceeds, indium and cadmium, which are negative in electrical ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B11/00C22B17/02C22B58/00
CPCC22B7/007C22B11/046C22B58/00C22B7/001C22B17/02Y02P10/20
Inventor 史智锋郑学军王涵睿陈昊孟志军张伟哲张骥董蔚蔡兴顺
Owner 西安诺博尔稀贵金属材料股份有限公司
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