Method for dry-pelletizing carbon black and equipment to impleme

Details Method for dry-pelletizing carbon black and equipment to impleme Method for dry-pelletizing carbon black and equipment to impleme

1989-09-20

1990-12-25

Fertig, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Vacuum treatment of work

To degas or prevent gas entrapment

23314, 264114, 264117, 425222, B29B 908

Patent

active

049801066

ABSTRACT:
The invention concerns a method for dry-pelletizing carbon black, allowing to control pellet quality and increasing the output of any particular pelletizing apparatus. The method calls for pre-compacting the material to be pelletized by means of vacuum before or during pelletizing. The invention also includes two apparatus to carry out the single-stage method version, comprising a pelletizing drum in which are mounted vacuum filter surfaces to pre-compact the powdery initial material in parallel with the on-going prepelletizing procedure. In one apparatus, the inside surface of the drum is a filter surface, in the other apparatus, bundles of stationary filter pipes are provided in the lower drum space.

REFERENCES:
patent: 2309970 (1943-02-01), McKinney
patent: 2422989 (1947-06-01), Skoog
patent: 2806771 (1957-09-01), Cuthbertson
patent: 2872300 (1959-02-01), Pollack
patent: 2883274 (1959-04-01), Ceresna
patent: 2892689 (1959-06-01), Rushford
patent: 4859387 (1989-08-01), McGriffin

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