Production of silicon carbide with automatic separation of a hig

Details Production of silicon carbide with automatic separation of a hig Production of silicon carbide with automatic separation of a hig

1985-11-05

1987-04-21

Reeves, Robert B.

Solid material comminution or disintegration

Processes

With heating or cooling of material

241 24, 423345, 252 6251, 252 6255, 209208, 209 3, 209 8, 209215, B02C 2100, C01B 3136

Patent

active

046590226

ABSTRACT:
Method of producing silicon carbide and of automatically separating a high grade fraction thereof using magnetic separation techniques. In the method of the invention, a silicon source, a carbon source and a ferromagnetic element source are admixed and the admixture is heated from the center outward to form a cylinder containing silicon carbide with a center to exterior temperature gradient. The ferromagnetic element migrates from the hotter center to the cooler exterior portions of the cylinder. The cylinder is cooled and crushed. The lower grade silicon carbide particles are then separated from the high grade silicon carbide crystals using magnetic separation means.

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