Process and apparatus for melting silicon powder

Details Process and apparatus for melting silicon powder Process and apparatus for melting silicon powder

1987-08-18

1988-11-29

Sever, Frank

Liquid purification or separation

Processes

Separating

156662, 210774, 210175, B01D 1700

Patent

active

047879866

ABSTRACT:
A process for continuous or batchwise melting of silicon powder in particular, powder having a large amount of fines, and a melting crucible for carrying out this process are specified. The melting crucible is designed so that a melt pool having a certain minimum height and which is covered by unmelted silicon powder is provided. Thus, added material first comes into contact with silicon powder which is already present and only gradually reaches the melting zone. The amount of melt produced which exceeds the minimum height of the melt pool flows out of the melting crucible. The minimum height is maintained in the process by using a crucible which has a siphon-like outlet in the base.

REFERENCES:
patent: 4151264 (1979-04-01), More et al.
patent: 4410494 (1983-10-01), Fiegl
patent: 4454096 (1984-06-01), Lorenzini et al.

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