| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.6 ( September 1982 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Metallurgical Characteristics of Combined-blown Converters
Jun Nagai, Takemi Yamamoto, Hirosuke Yamada, Hideo Take, Rinzo Tachibana, Hisashi Omori, Kyoji Nakanishi, Yoshiharu Iida |
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Synopsis : Kawasaki Steel Corporation has developed two different types of combined-blown processes for basic oxygen steelmaking; (1)inert gas-stirred LD(LD-KG) and (2)oxygen bottom-blown LD with the powdered lime injection (K-BOP). Small amount of bottom flows gas improves stirring intensity of steel bath and suppresses excessive oxidation of steel bath; hence LD-KG results in higher yields of iron and manganese than those of LD. K-BOP has shown much more advantages than other types of combined-blown processes, particularly in the removal of phosphorous and sulfur by the enhanced reaction with injected powdered lime. |
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