Process for the manufacture of desulfurizing agents for crude ir

Details Process for the manufacture of desulfurizing agents for crude ir Process for the manufacture of desulfurizing agents for crude ir

1981-01-02

1983-01-11

Rosenberg, P. D.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 53, 75 58, C21C 702

Patent

active

043680712

ABSTRACT:
The present invention relates to a process for the manufacture of desulfurizing agents containing 1-6% by weight of chemically bonded water, based on calcium oxide-containing calcium carbide, for crude iron and steel melts. To this end, a molten mixture of calcium carbide and calcium oxide with a CaO content of 20 to 80% by weight is produced, which is allowed to solidify into a block. Next, the block which still has an average temperature of more than 400.degree. C., is rough-crushed to particles with a size of less than 150 mm and calcium oxide is added to the comminuted mixture, which still has a temperature of at least 400.degree. C., in accordance with the CaO content desired in the end product. The mixture is finally ground in the presence of air or nitrogen with a moisture content of from 5 to 20 g/m.sup.3 (at 1.013 bar and 273.15 K) at temperatures below 100.degree. C. to particles with a size of less than 10 mm.

REFERENCES:
patent: 3598573 (1971-08-01), Freissmuth
patent: 4260413 (1981-04-01), Freissmuth

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