Chinese Academy of Sciences

Beijing University of Technology

Haoran Yuan

Yong Chen

Tao Lu

Chiguang Zhang

Yazhuo Wang

Yufeng Wu

The invention discloses a method for producing silicon carbide from waste circuit board cracking residue, belongs to the field of comprehensive utilization of waste circuit board cracking products, and particularly relates to a method for high-valued utilization of non-metal components in waste circuit board cracking residue. The method mainly comprises the following steps: rolling and crushing, vibration sorting, ultrafine pulverization and electro-separation, quantitative batching, microwave sintering and discharging and grading. Compared with the prior art, rolling crushing is adopted to replace traditional shearing crushing, microwave sintering is adopted to replace a traditional Acheson smelting furnace, the effects of being easy to operate, saving energy and reducing consumption are achieved, the production efficiency is greatly improved, and the production cost is reduced. A brand-new method for obtaining high-purity silicon carbide by partially replacing anthracite and quartz sand with cracked coke and silicon dioxide in waste circuit board light plates or epoxy resin cracking residues is adopted, and high-value utilization of waste resources is achieved. The method has the characteristics of simple and feasible process, low manufacturing cost and wide adaptability, and is beneficial to improving the economic benefit and social benefit of enterprise production.

Method for producing silicon carbide from waste circuit board cracking residue

A dry-wet combined sorting system for municipal solid waste comprising a dry type smashing and winnowing device and a wet type water sorting device. The system is compact in structure; smashing knives with different revolving speeds and the same revolving direction are provided, thereby enabling continuous processing of the system which is high in processing efficiency and simple in operation; meanwhile, multiple protection devices are provided, so that the whole system is safe and reliable; perishable organic matters, light combustible matters and inorganic matters can be separated completely; the light combustible matters are picked out by the dry type smashing and winnowing device, which ensures their low water content and facilitates their subsequent energy-oriented utilization. Therefore, the municipal solid waste is into valuable thing for it can be utilized sufficiently as a resource, and the system has very high environmental benefits and social benefits.

Dry-wet combined sorting system for municipal solid waste

The invention discloses a system for squeezing, smashing and winnowing municipal solid waste (MSW). The system comprises a primary squeezing and smashing, device and a secondary smashing and winnowing device. The system of the invention has good effect m squeezing, smashing and winnowing, can greatly reduce the water content of MSW and efficiently separate the MSW into combustible matters and non-combustible matters, so as to facilitate further subsequent utilization of the municipal waste; moreover, an upper jaw of a jaw crusher is connected with a spring device, so that the squeezing pressure, smashing effect and processing capacity of the jaw crusher can be adjusted according to the amount of the MSW. In addition, the system of the invention is further provided with emergency brake switches, spring protection devices and a sieve, so as to ensure the stability and the reliability of the system.

Growing community of inventors

Guangzhou, China

Haoran Yuan