Method for smelting reduction of Ni ore

Details Method for smelting reduction of Ni ore Method for smelting reduction of Ni ore

1990-02-01

1991-05-21

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

420119, C22B 2300

Patent

active

050172204

ABSTRACT:
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 [(H.sub.2 O+CO.sub.2)/(H.sub.2 +H.sub.2 O+CO+CO.sub.2)] 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:

REFERENCES:
patent: 3769002 (1973-10-01), O'Neill et al.
patent: 4029497 (1977-06-01), Nixon
patent: 4399983 (1983-08-01), Metz

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