Method for manufacturing steel through smelting reduction
AssigneeNippon Kokan Kabushiki Kaisha
InventorsAkichika Ozeki, Kenzo Yamada, Katsuhiro Iwasaki
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Abstract
A method for manufacturing molten steel wherein iron ore and coal are continuously supplied onto molten metal containing carbon of 1% or less while blowing oxygen gas is being introduced onto the molten metal through a lance. Simultaneously with this operation, stirring gas is being introduced into the molten metal at a rate of 0.05 to 0.5 Nm.sup.3 /min/ton of molten metal through a tuyere. The slag and the molten steel produced, is continuously or periodically discharged.
Claims17
A method for manufacturing steel through smelting reduction which comprises the steps of:
- providing molten metal comprising iron containing 0.05 to 1.0% carbon in a converter-type reaction vessel;
- charging continuously iron ore and coal onto the molten metal while (i) stirring gas, a a rate of 0.05 to 1.0 Nm.sup.3 /min/T where T represents one ton of molten metal, and (ii) oxygen gas, are being blown onto the molten metal to reduce the iron ore;
- and
- discharging slag product and molten steel product.
A method of manufacturing steel through smelting reduction which comprises the steps of:
- providing molten iron containing 0.05 to 0.7% carbon in a converter-type reaction vessel;
- charging continuously iron ore and coal onto the molten iron, while (i) stirring gas, at a rate of 0.1 to 1.0 Nm.sup.3 /min./ton and (ii) oxygen gas for blowing, are blown in, to reduce the iron ore;
- and
- discharging slag product and molten steel product having a carbon content of 1% or less.
Dependencies are inferred from the claim text.