C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
C
53/99
C21C 7/064 (2006.01)
Patent
CA 1149618
PROCESS FOR THE MANUFACTURE OF DESULFURIZING AGENTS FOR CRUDE IRON OR STEEL MELTS ABSTRACT OF THE DISCLOSURE: 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° 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° 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/m3 (at 1.013 bar and 273.15 K) at temperatures below 100° C to particles with a size of less than 10 mm.
368479
Braun Albert
Delhey Hans-Martin
Portz Willi
Strauss Georg
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
Krupp Stahl Aktiengesellschaft
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