Drying system for silicon carbide powder

Abstract

The invention relates to a drying system for silicon carbide powder and relates to the technical field of silicon carbide powder production. The drying system comprises a vertically arranged drying cylinder, a stirring chamber is arranged on the lower portion of the drying cylinder, a hot air inlet is formed in the side wall of the stirring chamber, the hot air inlet is connected with a tangentialair inlet channel, and the front end of the tangential air inlet channel is connected with a hot air mechanism for providing hot air for the drying cylinder. A stirrer is arranged in the stirring chamber, a powder ascending channel is arranged in the drying cylinder above the stirring chamber, a wet material feeding port is formed in the butt joint position between the powder ascending channel and the stirring chamber, the wet material feeding port is connected with a feeding mechanism, and a temperature measuring point is arranged on the powder ascending channel above the wet material feeding port. A dry material discharge port is formed in the upper part of the powder ascending channel and is connected with a powder separation system through a discharge pipeline; and an induced draft fan is arranged on a tail gas exhaust pipe of the powder separation system. The drying system has the characteristics that drying is uniform and thorough, material waste is reduced, cost is reduced, andair pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of silicon carbide powder production, in particular to a drying system for silicon carbide powder. Background technique [0002] Due to its stable chemical properties, high thermal conductivity, small thermal expansion coefficient, and good wear resistance, silicon carbide has many other uses besides being used as an abrasive. The industrial method of silicon carbide is to use high-quality quartz sand and petroleum coke to refine it in a resistance furnace. Pure silicon carbide is colorless, while industrial production of brown to black is due to iron-containing impurities. The silicon carbide blocks obtained by refining are made into various kinds of silicon carbide blocks by crushing, acid-base washing, magnetic separation and screening or water separation. granular product. [0003] Since silicon carbide often contains impurities such as iron, it is necessary to purify and classify silicon carbide. Firs...

AI Technical Summary

Problems solved by technology

In the prior art, the drying of silicon carbide is carried out in a drying furnace, but the drying is often uneven, the inside of the dried silicon carbide powder is wet, and the drying quality is poor, resulting in waste of materials. The air contains dust, which is discharged directly or after dust removal, and the dust removal is not complete, causing air pollution

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