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Caloric synergistic environment-friendly reclamation method for waste integrated circuit boards

An integrated circuit and resource-based technology, which is applied in chemical instruments and methods, separation methods, gasification processes, etc., can solve the problems of lack of large-scale equipment, collaborative smelting equipment and flue gas treatment equipment with high requirements, and inability to carry out industrial production. , to achieve the effects of no pollution to flue gas, short-process recovery of valuable metals, and improved crushing and sorting effects

Active Publication Date: 2018-06-15
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the advantages of strong processing capacity and light secondary pollution, but it has high requirements for collaborative smelting equipment and flue gas treatment equipment. At present, there is a lack of large-scale equipment in China, and industrial production cannot be carried out.

Method used

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  • Caloric synergistic environment-friendly reclamation method for waste integrated circuit boards

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Follow the steps below to recycle:

[0022] (1) The waste integrated circuit board is carbonized and cracked to obtain carbonized cracking slag and carbonized cracking tail gas. During the carbonization and cracking process, the oxygen partial pressure is controlled to 6%, nitrogen protection is used, the carbonization cracking temperature is 400 ° C, and the carbonization cracking time is 1 hour. ;The carbonization and cracking tail gas is separated from oil and gas to obtain carbonization and cracking oil and carbonization and cracking gas, and the carbonization and cracking gas is obtained by carbonization and combustion to obtain combustion tail gas and heat, and the heat generated directly provides a heat source for carbonization and cracking;

[0023] (2) The carbonized cracking slag obtained by carbonization and cracking is crushed and winnowed to obtain crushed material and dust. During the crushed winnowing process, the crushed particle size is less than 100 mes...

Embodiment 2

[0028] Follow the steps below to recycle:

[0029] (1) The waste integrated circuit board is carbonized and cracked to obtain carbonized cracking slag and carbonized cracking tail gas. During the carbonization and cracking process, the oxygen partial pressure is controlled to 5%, nitrogen protection is used, the carbonization cracking temperature is 700 ° C, and the carbonization cracking time is 3 hours. ;The carbonization and cracking tail gas is separated from oil and gas to obtain carbonization and cracking oil and carbonization and cracking gas, and the carbonization and cracking gas is obtained by carbonization and combustion to obtain combustion tail gas and heat, and the heat generated directly provides a heat source for carbonization and cracking;

[0030] (2) The carbonized cracking slag obtained by carbonization and cracking is crushed and winnowed to obtain crushed material and dust. During the crushed winnowing process, the crushed particle size is less than 100 me...

Embodiment 3

[0035] Follow the steps below to recycle:

[0036](1) The waste integrated circuit board is carbonized and cracked to obtain carbonized cracking slag and carbonized cracking tail gas. During the carbonization and cracking process, the oxygen partial pressure is controlled to 3%, nitrogen protection is used, the carbonization cracking temperature is 450 ° C, and the carbonization cracking time is 2 hours. ;The carbonization and cracking tail gas is separated from oil and gas to obtain carbonization and cracking oil and carbonization and cracking gas, and the carbonization and cracking gas is obtained by carbonization and combustion to obtain combustion tail gas and heat, and the heat generated directly provides a heat source for carbonization and cracking;

[0037] (2) The carbonized cracking slag obtained by carbonization and cracking is crushed and winnowed to obtain crushed material and dust. During the crushed winnowing process, the crushed particle size is less than 100 mes...

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Abstract

A caloric synergistic environment-friendly reclamation method for waste integrated circuit boards involves a carbonization pyrolysis system, a crushing separating system, a gasification pyrolysis system and a calorific value utilization and comprehensive recovery system. Compared with the prior art, the carbonization pyrolysis system can realize dry distillation pyrolysis of organic matter in thewaste integrated circuit boards, carbon, hydrogen and other elements can be converted into carbonization pyrolysis gas and pyrolysis oil serving as fuel. The combusting heat of the carbonization pyrolysis gas serves as energy needed by carbonization pyrolysis, and self-heating carbonization pyrolysis is achieved. Carbonization pyrolysis products are crushed and separated, the problem that crushingis difficult and metal is wrapped by organic matter brought by a traditional method of direct crushing and separation of circuit boards are solved, and the crushing effect and the separation effect are improved. The gasification pyrolysis system realizes comprehensive utilization of residual carbon, generated gasification pyrolysis gas can be used as a heat source needed by subsequent valuable metal recycling, and the utilization heat of the caloric value is further improved. The caloric synergistic environment-friendly reclamation method for waste integrated circuit boards has the characteristics of being high in caloric value utilization rate, low in energy consumption, high in metal recycling rate, capable of realizing short-process recycling of valuable metal, free of pollution in smoke and the like.

Description

technical field [0001] The present invention relates to the comprehensive recovery technology of waste integrated circuit boards, in particular to the collaborative green resource utilization of heat and valuable substances of waste integrated circuit boards by adopting technologies such as carbonization pyrolysis, gasification pyrolysis, crushing and sorting, and heat source utilization. technology. Background technique [0002] Integrated circuit boards are an important part of electrical and electronic products and the foundation of modern electrical and electronic industries. Integrated circuit boards are mainly copper clad laminates composed of electronic components, glass fiber reinforced epoxy resin, and many metal materials including precious metals. Waste integrated circuit boards (WPCB) contain a large amount of valuable metals such as gold, silver and palladium, which are much higher than the original mineral deposits and have great recycling value. At the same ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00C10B53/00C10G1/00
CPCC10B53/00C10G1/00B09B3/00B09B5/00C10G2300/1003B09B3/40Y02W30/82B03C3/017B03C1/30B03C2201/20C10B53/07C10J3/62C10J2300/0946C10J2300/0976C10J2300/1628C10J2300/1687C10J2300/1853Y02P20/143B01D53/70B01D2258/0216B01D2257/2064C22B7/005C22B7/001C22B1/005B09B2101/17
Inventor 潘德安吴玉锋左铁镛
Owner BEIJING UNIV OF TECH
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