Method for recycling germanium, gallium, indium and selenium in waste diode

Abstract

The invention relates to treatment of waste metal materials, and in particular relates to a method for recycling germanium, gallium, indium and selenium in a waste diode. The recycling method comprises the following steps of: (1) crushing the waste diode; (2) separating plastic powder from metal powder; (3) oxidizing roasting; (4) recycling selenium; and (5) recycling gallium, indium and germanium. By using the method, the pollution of the diode on the environment is reduced, valuable elements of selenium, indium, gallium and germanium are recycled, and mineral resources are saved; and the method is simple to operate, lower in cost, high in recycling rate of selenium, indium, gallium and germanium elements and very high in purity of recycling products.

Description

technical field

[0001] The invention relates to the treatment of waste metal materials, in particular to a recovery method for germanium, gallium, indium and selenium in waste diodes. Background technique

[0002] Diodes have the functions of rectification, detection, amplitude limiting, voltage stabilization, protection, etc., and are widely used in various electronic circuits. The semiconductor materials include gallium arsenide, aluminum gallium arsenide, indium gallium nitride, zinc selenide, phosphide Indium gallium aluminum, germanium, etc., when disposing of circuit boards or electronic waste containing diodes, a large number of discarded diodes will be produced. These discarded diodes contain valuable metals such as gallium, germanium, indium, selenium, and toxic elements such as arsenic. Discarding or burying will not only pollute the environment, but also not conducive to building a conservation-minded society. Contents of the invention

[0003] The object of th...