Method for smelting reduction of ni ore

Details Method for smelting reduction of ni ore Method for smelting reduction of ni ore

C - Chemistry, Metallurgy

22

B

53/300, 53/68

C22B 23/02 (2006.01) C21B 13/00 (2006.01) C21C 5/00 (2006.01) C22C 33/04 (2006.01) C22C 38/08 (2006.01)

Patent

CA 2010357

A method for smelting reduction of Ni ore comprises charging Ni ore, carbonaceous material and flux into a converter type smelting reduction furnace holding molten iron therein and controlling a post-combustion ratio (( H2O + CO2)/( H2 + H2O + CO + CO2) ] inside the smelting reduction furnace at 0.3 or more by blowing oxygen from a top-blow oxygen lance and stirring gas from a bottom-blow tuyere arranged in the bottom of the smelting reduction furnace into the smelting reduction furnace. A relation between a content of carbon (C) (%) in molten metal and an amount of slag produced per ton of molten metal is represented with a formula: [C] S (T/HMT)/3.

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