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A recovery system and method for mercury cadmium telluride material

A recycling method and technology of mercury cadmium telluride, applied in the field of semiconductor material recycling, to achieve the effects of preventing damage, preventing the occurrence of unfavorable factors, and having a high degree of mechanization

Active Publication Date: 2021-03-19
中国东方电气集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no technology to recycle HgCdTe waste. Therefore, it is urgent to recycle HgCdTe waste to improve resource utilization and ensure environmental safety and human health.

Method used

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  • A recovery system and method for mercury cadmium telluride material
  • A recovery system and method for mercury cadmium telluride material
  • A recovery system and method for mercury cadmium telluride material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] like Figure 3-4 Shown: a recovery system for HgCdTe materials, including a crushing device for crushing HgCdTe waste blocks into powder 1, a closed acid hydrolysis tank for acid reaction of HgCdTe waste powder 2, and a filter device for filtering 3. The electrolytic cell 4 for electrolyzing the filtrate and the heating device 5 for refining, the crushing device 1 and the acidolysis tank 2 are connected by a delivery pipe 6, and the delivery pipe 6 is provided with a valve 7; Ventilation mechanism 8 and acid delivery pipe 9 are arranged on it, and acidolysis pool 2 is connected with filtering device 3 through delivery pipe 6, and delivery tube 6 is provided with valve 7; Said filtering device 3 is connected with electrolytic cell 4 through delivery tube 6, The delivery pipe 6 is provided with a valve 7; the electrolytic cell 4 is provided with an inert electrode and a metal electrode, the inert electrode is an anode, and the metal electrode is a cathode; the anode and t...

Embodiment 2

[0057] like figure 2 Shown: on the basis of embodiment 1, further,

[0058] Described ventilation mechanism 8 comprises air outlet pipe 801 and air inlet pipe 802, and one end of air outlet pipe 801 is connected with acidolysis pool 2, and the other end is connected with absorption pool 10, and air outlet pipe 801 extends in the absorption pool 10, and alkali is housed in the absorption pool 10 Liquid, to neutralize acidolysis tank 2 escaping gas; One end of inlet pipe 802 is connected with acid solution tank 2, and the other end is connected with nitrogen storage tank, guarantees the air pressure dynamic balance in acid solution tank 2.

Embodiment 3

[0060] On the basis of embodiment 2, further,

[0061] A transition tank 11 is provided between the acidolysis tank 2 and the electrolytic tank 4 , and the filter device 3 is arranged in the transition tank 11 .

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Abstract

The invention discloses a mercury cadmium telluride material recycling system and method, and belongs to the technical field of semiconductor material recycling. According to the technical scheme, chemical and physical properties of tellurium, cadmium and mercury in mercury cadmium telluride waste are combined with chemical and physical properties between tellurium, cadmium and mercury, through the arrangement of a crushing device, an acid hydrolysis tank, a filtering device, an electrolytic tank, a heating device and the like, the complete recycling system is formed. On the basis of the recycling system, the mercury cadmium telluride material is recycled through procedures such as crushing, acid reaction, filtration and electrolysis and the like; and finally, cadmium, mercury and tellurium oxide are obtained. The recycling method is simple in process and high in mechanization degree, and the recycling rate is over 95%.

Description

technical field [0001] The invention relates to a material recycling system and method, in particular to a material recycling system and method in mercury cadmium telluride waste, and belongs to the technical field of semiconductor material recycling. Background technique [0002] Soft and brittle HgCdTe crystal is a typical representative of the third-generation semiconductor materials, with excellent photoelectric properties, it is widely used in the field of infrared detection, especially in aerospace, military, national economy and many other important fields, including military Reconnaissance and identification, space remote sensing, airborne remote sensing, meteorological monitoring, environment and resource monitoring, etc. Hg 1-x Cd x The bandgap of Te semiconductor can cover the range of 1 to 25 microns, and it is an important material for manufacturing infrared detectors, and has been widely studied and used at home and abroad. [0003] At present, the applicati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B17/06C25C1/16C01B19/00
CPCC01B19/004C22B7/007C22B17/06C25C1/16Y02P10/20
Inventor 袁小武雷聪杨武勇李景阳杨旭孙平张程
Owner 中国东方电气集团有限公司