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AssigneeNational Research Institute for Metals
InventorsRyuichi Nakagawa, Shiro Yoshimatsu, Akira Fukuzawa, Akira Sato, Tsuyoshi Ozaki
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In a continuous melting, refining and casting process which comprises, substantially in series, a step of melting and carburizing steel scrap, iron scrap and/or reduced iron as a raw material in a combustion-type melting furnace, a refining step by blowing of oxygen, a refining and holding step and a continuous casting step, the improvement wherein an intermediate holding step in a holding furnace is provided between the melting and carburizing step and the refining step so that the molten metal tapped from the melting furnace is held in the intermediate holding furnace for a certain period of time and continuously fed to the refining step at a predetermined flow rate, and wherein the refining conditions in the refining step are controlled according to one or more characteristics of the molten metal in the intermediate holding step.
In a continuous melting, refining and casting process for the production of steel from steel scrap, iron scrap and/or reduced iron by performing the following steps, substantially in series:
Dependencies are inferred from the claim text.