J. Mater. Sci. Technol. ›› 1991, Vol. 7 ›› Issue (1): 50-54.

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Metallurgical Reaction Characteristic for the Combined Blowing Process of Top-Bottom Blown Oxygen and Bottom Blown Natural Gas

YAN Guongting TA NG Ping ZHANG Shujun Chongqing University,Chongging,630004,China.To whom correspondence should be addressed.   

  1. ChongqingUniversity,Chongqing,630004,China.Towhomcorrespondenceshouldbeaddressed.;ChongqingUniversity,Chongqing,630004,China.;ChongqingUniversity,Chongqing,630004,China.
  • 收稿日期:1991-01-28 修回日期:1991-01-28 出版日期:1991-01-28 发布日期:2009-10-10

Metallurgical Reaction Characteristic for the Combined Blowing Process of Top-Bottom Blown Oxygen and Bottom Blown Natural Gas

YAN Guongting TA NG Ping ZHANG Shujun Chongqing University,Chongging,630004,China.To whom correspondence should be addressed.   

  • Received:1991-01-28 Revised:1991-01-28 Online:1991-01-28 Published:2009-10-10

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摘要： <正> The experiment was carried out in a combinedblowing converter.The natural gas was supplied asthe cooling medium for the bottom lance.The blow-ing practice of medium P hot metal(0.30-0.85% [P]) indicated that with better stirringat the bottom of the converter and lower P_(CO),thissteelmgking process was favorable to reduce theamount of [C] and [O] and increase the (P_2O_5)/[P].The maximum rate of dephospborization might behigh up to 0.0a5%/min and the P content in steelcould be reduced to lower than 0.03% by singleslag-forming operation.

Abstract: The experiment was carried out in a combined blowing converter.The natural gas was supplied as the cooling medium for the bottom lance.The blow- ing practice of medium P hot metal (0.30-0.85% [P]) indicated that with better stirring at the bottom of the converter and lower P_(CO),this steelmgking process was favorable to reduce the amount of [C] and [O] and increase the (P_2O_5)/[P]. The maximum rate of dephospborization might be high up to 0.0a5%/min and the P content in steel could be reduced to lower than 0.03% by single slag-forming operation.

Key words: combined blowing process, metallurgical reaction, oxygen blowing