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PRODUCTION OF MOLTEN STEEL

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  • Title:
    PRODUCTION OF MOLTEN STEEL
  • Author: YANO MASATAKA
  • Subjects: CHEMISTRY ; METALLURGY ; METALLURGY OF IRON ; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL ; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
  • Description: PURPOSE:To attain energy saving as well as remarkable reduction in fixed costs and equipment costs by successively repeating a stage of charging molten pig iron into a converter, a stage of flux addition to exert dephosphorization and desulfurizing refining, a stage of slag removal, a stage of decarburization, and a stage of tapping, leaving slag. CONSTITUTION:At the time of producing a molten steel by refining blast furnace molten pig iron, first the molten pig iron is charged into a converter as a first stage, and then, as a second stage, the addition of flux by means of any of throwing, spraying, and blowing or a combination of more than two among the above and the top blowing of oxygen are carried out to perform dephosphorization and desulfurizing refining and reduce P content and S content to the prescribed values, respectively. Subsequently, as a third stage, the converter is tilted and the formed slag is slagged off, and, as a fourth stage, decarburization is exerted until the prescribed C content is reached by means of flux addition and O2 blowing. Finally, tapping is performed while leaving the slag formed in the fourth stage as a fifth stage. Then, the first stage is restored again, and the above-mentioned five stages are repeatedly carried out.
  • Creation Date: 1992
  • Language: English
  • Source: esp@cenet
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