Deoxidizing and desulphurizing steel

Details Deoxidizing and desulphurizing steel Deoxidizing and desulphurizing steel

1976-09-23

1977-10-18

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 53, 75 55, 75 58, C21C 710, C21C 702, C21C 706

Patent

active

040544451

ABSTRACT:
Unkilled steel is transferred, substantially without slag, from the refining reactor to a degassing reactor. The pressure in the degassing reactor is reduced to not more than 200 mm. Hg, and calcium carbide is added in a quantity such that calcium added is from 1 to 2 kg. per ton of steel. A vacuum is maintained for 10 to 20 minutes and then released. Preferably, the calcium carbide additive contains 5 to 25% by weight of calcium fluoride.

REFERENCES:
patent: 3467167 (1969-09-01), Mahin
patent: 3980469 (1976-09-01), Forster

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