Title:
METHOD FOR PREPARING SILICON CARBIDE FROM WASTE CIRCUIT BOARD LIGHT PANEL CRACKING RESIDUE
Document Type and Number:
WIPO Patent Application WO/2022/122022
Kind Code:
A1
Abstract:
A method for preparing silicon carbide from a waste circuit board light panel cracking residue, belonging to the field of comprehensive utilization of waste circuit board cracking products, and particularly relating to a new method for high-value utilization of non-metal components of a waste circuit board light panel substrate cracking residue. The method comprises the following main steps: rolling and crushing, vibrating and sorting, ultra-fine pulverization and electric separation, quantitative burdening, microwave sintering and discharging and grading. Compared with the prior art, rolling and crushing is used in the present invention instead of traditional shearing and crushing, and microwave sintering is used instead of a traditional Acheson smelting furnace, such that the method has the effects of being easy to operate, and saving energy and reducing consumption, and greatly improves the production efficiency and reduces the production cost. According to the new method involving partially replacing anthracite and quartz sand with cracked coke and silicon dioxide from a waste circuit board light panel or epoxy resin cracking residue to obtain high-purity silicon carbide, the high-value utilization of waste resources is achieved. The method has the characteristics of a simple and feasible process, low manufacturing costs and a wide adaptability, and is beneficial for improving the economic and social benefits of enterprise production.
Inventors:
WU YUFENG (CN)
YUAN HAORAN (CN)
YUAN HAORAN (CN)
Application Number:
PCT/CN2021/137128
Publication Date:
June 16, 2022
Filing Date:
December 10, 2021
Export Citation:
Assignee:
UNIV BEIJING TECHNOLOGY (CN)
GUANGZHOU INST ENERGY CONVERSION CAS (CN)
GUANGZHOU INST ENERGY CONVERSION CAS (CN)
International Classes:
C01B32/97; C01B32/40; C22B7/00; C22B15/00; F27B17/00
Foreign References:
| CN112678827A | 2021-04-20 | |||
| CN111960420A | 2020-11-20 | |||
| CN1472136A | 2004-02-04 | |||
| CN106882806A | 2017-06-23 | |||
| CN108160665A | 2018-06-15 | |||
| CN109748281A | 2019-05-14 | |||
| CN111977657A | 2020-11-24 |
Attorney, Agent or Firm:
BEIJING SIHAI TIANDA INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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