Process for preparing binder-free hot-briquets

Details Process for preparing binder-free hot-briquets Process for preparing binder-free hot-briquets

1983-06-16

1985-08-06

Woo, Jay H.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 05R, 75 5, 75 25, 264125, 419 35, C21B 1300

Patent

active

045333840

ABSTRACT:
The invention relates to a process and an apparatus for preparing binder-free hot-briquets for smelting purposes from ferrous pyrophorous, finely divided solids, such as dry steelmaking-filter dust or slightly granular sponge iron from direct-reduction plants. Before the briquetting stage, oxidizing gas is blown at a temperature of more than 200.degree. C. through the finely divided dry solid containing more than 4% by weight of metallic iron. The flow rate of this gas is controlled in such a way that oxidation of some of the metallic iron raises the temperature of the finely divided solid to 450.degree. to 650.degree. C. This is followed by hot-briquetting.

REFERENCES:
patent: 3125437 (1964-03-01), Moore
patent: 3564699 (1971-02-01), Moore
patent: 3814598 (1974-06-01), Gabriel et al.
patent: 4071595 (1978-01-01), Komarek et al.
patent: 4093455 (1978-06-01), Pietsch
patent: 4208367 (1980-06-01), Wunning
patent: 4213779 (1980-07-01), Carwell
patent: 4273575 (1981-06-01), Litzinger et al.

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