Method for recycling gallium from indissolvable gallium compounds and gallium recycled by virtue of method

A compound, insoluble technology, applied in the field of gallium recovery, can solve the problems of difficult separation, consumption of large oxides, harsh conditions, etc., to achieve the effect of simple process flow, improved leaching rate, and less time consumption
CN108374091AActive Publication Date: 2018-08-07INST OF PROCESS ENG CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INST OF PROCESS ENG CHINESE ACAD OF SCI
Publication Date
2018-08-07

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Abstract

The invention provides a method for recycling gallium from indissolvable gallium compounds and gallium recycled by virtue of the method. The method comprises the steps of mixing waste containing the indissolvable gallium compounds with a chlorinating agent, sintering, leaching a sintered product, and carrying out electrolysis, so as to obtain metal gallium. According to the method, the waste containing the indissolvable gallium compounds is mixed with the chlorinating agent and is sintered, and the difficulty-leached gallium compounds are converted into easily-leached gallium chloride, so thatthe leaching rate of gallium is greatly increased, the recycling rate of gallium reaches 98% or above, and the purity of metal gallium can reach 99.9wt%. The process flow is simple, the consumed timeis relatively short, the waste gas and the dust which are harmful to the environment are not discharged, and the method has wide industrial application prospects.
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Description

technical field

[0001] The invention belongs to the technical field of recycling semiconductor waste materials, and relates to a method for recovering gallium from waste materials containing insoluble gallium compounds and the gallium obtained by the method. Background technique

[0002] Gallium nitride (GaN) is widely used in solid-state light sources, electronic power and microwave radio frequency devices due to its superior properties such as large band gap, high breakdown electric field, high thermal conductivity, high electron saturation drift rate and strong radiation resistance. Wide range of applications, its products cover semiconductor lighting, mobile communications, energy Internet, high-speed rail transit, new energy vehicles and consumer electronics and other fields. With the upgrading of products, the amount of waste slag containing gallium nitride in my country is also increasing rapidly year by year. Since gallium is a scattered metal, the annual output is l...

Claims

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