C - Chemistry – Metallurgy – 21 – C
Patent
C - Chemistry, Metallurgy
21
C
53/106
C21C 7/064 (2006.01) C21C 1/02 (2006.01) C21C 1/04 (2006.01)
Patent
CA 1141964
AGENT FOR DESULFURIZING CRUDE IRON AND STEEL MELTS, AND PROCESS FOR MAKING IT ABSTRACT OF THE DISCLOSURE: The invention provides an agent for desulfurizing crude iron and steel melts, the desulfurizing agent being based on calcium carbide containing calcium oxide. The desulfurizing agent is produced by ad- mixing a calcium carbide melt having up to 45 weight% of calcium oxide therein with an excess of 3 to 15 weight%, based on the CaO-content of 45 to 80 weight% desired for the final product, of calcium oxide. The resulting mixture is allowed to solidify and cool down to temperatures of 350 to 450° C. Next, the solidified melt is precrushed to material with a size of less than 150 mm. Particles with a size of less than 4 mm are screened off and the remaining material in comminuted with the exclusion of moisture, to material with a size of less than 10 mm.
350241
Braun Albert
Portz Willi
Strauss Georg
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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