C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
53/300, 53/68
C22B 5/10 (2006.01) C21B 5/00 (2006.01) C21B 13/00 (2006.01) C22B 23/02 (2006.01) C22C 1/02 (2006.01) C22C 38/08 (2006.01)
Patent
CA 2011702
A method for smelting reduction of Ni ore comprises charging Ni ore and carbonaceous material into a converter type smelting reduction furnace having bottom-blow tuyeres and a top-blow lance, the smelting reduction furnace holding a molten metal, blowing oxygen gas from the top-blow lance and a stirring gas from the bottom-blow tuyeres into the furnace, and discharging slag so that a relation represented with a formula Vo > 0.4 Ws + 1.0 can be satisfied, Vo ( m3 per ton of molten metal ) being a specific volume of the smelting reduction furnace per ton of molten metal and Ws ( ton per ton of molten metal ) being 2 specific weight of slag per ton of molten metal.
Iwasaki Katsuhiro
Kawakami Masahiro
Takaoka Toshio
Taki Chihiro
Tanabe Haruyoshi
Nkk Corporation
Ridout & Maybee Llp
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