| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.17 ( October 1987 ) ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Construction and Operation of Hot Metal Pretreatment Facilities at Mizushima Works Masahito Suitoh, Masanori Kodama, Hideo Take, Shoichi Hiwasa, Masahiro Yoshida, Yoshitaka Ohiwa |
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Synopsis : Hot metal pretreatment facilities at Mizushima Works were started in March 1985. They consist of equipment for desiliconization in runner at No.4BF and desiliconization, dephosphorization and desulfurization in torpedo cars. The facilities also include a torpedo car cleaning equipment for preventing torpedo car from turning pollutive. The hot metal pretreatment facilities have the following features: In the desiliconization equipment in runner, a two-dispenser method is adopted for mass treatment of desiliconization: in the Hot Metal Pretreatment Center, a post-mix method which mixes four different kinds of fluxes at a merging point in injection pipes, and a slanting injection lance is used; and in the torpedo car cleaning equipment, a remaining-hot-metal treatment method is used in molten iron condition during slag-off. Recently, the monthly amount of dephosphorized hot metal has exceeded 100 000 t. A supply of desiliconized or dephosphorized hot metal to converters has been found highly advantageous in cost saving. |
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