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1. 发明专利

JPH049419A METHOD FOR CONTROLLING SILICON CONTENT IN MOLTEN IRON 失效
公开(公告)号：JPH049419A
公开(公告)日：1992-01-14
申请号：JP10873990
申请日：1990-04-26
申请人： NIPPON KOKAN KK
发明人： AOKI TAICHI , INABA YUZURU , TARUMI YOSHIHIKO , SUMIKAMA TAKASHI
IPC分类号： G01N33/20 , C21C1/04
摘要： PURPOSE:To automatically and adequately control an Si content by measuring the Si content in a molten iron and charging the desiliconizing agent of the amt. corresponding thereto into the molten iron. CONSTITUTION:The consumption unit D of the desiliconizing agent is determined by a means 31 for computing the consumption unit of the desiliconizing agent in accordance with the temp. of the molten iron 12 from a measuring probe 20 and the Si content computed by a means 30 for computing the Si value from an Si sensor output. On the other hand, a tapping rate is computed in a computing means 32 by the weight of the molten iron detected with a load cell 22. The charging rate of the desiliconizing agent is determined by a computing means 33 from the tapping rate and the above-mentioned consumption unit D. The opening degree of a valve 35 having a proportional relation with the above-mentioned charging rate is regulated by the charging rate of the desiliconizing agent with a flow rate regulator 34. Compressed air 35 is sent into a desiliconizing agent tank 37 at the flow rate meeting the opening degree of the valve 35. The desiliconizing agent proportional to this flow rate is fed into the molten iron 12 via a charging lance 38, by which the Si content to be fed in the molten iron 12 is controlled.

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