Apparatus for making green briquettes for forming Si, SiC or fer

Details Apparatus for making green briquettes for forming Si, SiC or fer Apparatus for making green briquettes for forming Si, SiC or fer

1990-09-28

1991-12-17

Yuen, Henry C.

Heating

Tumbler-type rotary - drum furnace

432 58, 432105, 432109, 432117, F27B 700

Patent

active

050731076

ABSTRACT:
A process and apparatus for the preparation of green briquettes for the production of silicon or silicon carbide or ferrosilicon in electric pit furnaces, quartz sand, a carbon carrier and a bituminous binder being mixed together, the mixture being shaped into blanks from which the green briquettes are formed by heat treatment. The process is performed with the use of blanks which are free from melted bituminous caking coal and whose specific weight is made greater than the bulk density of quartz sand by adjustment of the proportions of the mixture and by compacting. The blanks are introduced for the heat treatment into a heated rotating drum furnace whose lower part is filled with quartz sand to an extent such that the heat treatment proceeds in a dip bed of quartz sand.

REFERENCES:
patent: 3206526 (1965-09-01), Rygaand
patent: 4462794 (1984-07-01), Pfeffer, III et al.
patent: 4541346 (1985-09-01), Culliford
patent: 4859177 (1989-08-01), Kreisberg et al.
patent: 4957429 (1990-09-01), Mendenhall

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