Process for pelletizing highly reactive powders

Details Process for pelletizing highly reactive powders Process for pelletizing highly reactive powders

1990-09-04

1991-04-16

Theisen, Mary Lynn

Plastic and nonmetallic article shaping or treating: processes

Forming articles by uniting randomly associated particles

Agitating to form larger particles

23313R, 23313P, 106772, 106775, 106792, 106800, 106801, C04B 202, C04B 1128, B29B 908

Patent

active

050080555

ABSTRACT:
A method for forming strong and durable pellets from dust collected from stack gases. The dust includes CaSO.sub.3, CaSO.sub.4 and unreacted CaD. A portion of water required for total hydration with the dust is blended in a mixer. The moistened powder is stored in a conditioning container wherein the moistened powder is chemically reacted and heated to form a hydroxide with the oxides in the powder. Water is added to the hydrates and the wetted hydrates are subjected to an intense second mixing. The wetted hydrates are then pelletized in a pelletizer.

REFERENCES:
patent: 2044553 (1936-06-01), Welch
patent: 2408647 (1946-10-01), Huntzicker et al.
patent: 2894820 (1959-07-01), Rikard et al.
patent: 3441511 (1969-04-01), Otrhalek et al.
patent: 3883281 (1975-05-01), Holley
patent: 4264543 (1981-04-01), Valenta
patent: 4726755 (1988-02-01), Holley
patent: 4744829 (1988-05-01), Eirich et al.
patent: 4881887 (1989-11-01), Holley

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