Steelmaking by Injection of Oxygen and Lime Powder Irsid-O.L.P. Process

THE injection of powdered materials, capable of reacting rapidly with a metallic bath has long been considered, and for several years IRSID has pursued a systematic study of "metallurgy by injection of powders".This res-earch has already led to known industrial developments, such as the desulphurisation of pig iron by powdered lime, the treatment of siliceous pig iron in the basic Bessemer converter, and the thermal controlled thermal adjust- ment of the operation in the converter. Numerous technical developments made during these res-earch projects, as well as the acquisition Of new fund-amental data, have led IRSID to expand this technique and to develop a new steelmaking process which can be applied to pig irons of any phosphorus and silicon content.