Development of Highly Efficient Stainless Steelmaking by Cr Ore Smelting Reduction Method

摘要

Kawasaki Steel constructed a new stainless steelmaking plant as a part of modernization plan of its Chiba Works, which started its operation in July 1994. This report describes the design of two main converters in a steelmaking shop, SR-KCB and DC-KCB. Main features of SR-KCB are the direct use of Cr ore sand and a high scrap melting capability. In DC-KCB, a rapid decarburization from high carbon content of more than 5 percent can be achieved by strong stirring and large flow rates of dilution gas. By a combination of DC-KCB and VOD, ultra low carbon steel can be produced without excess chromium oxidation in an ordinary treatment time.