Control Method of Preventing Splashing in the Process of BOF Refining Steel Based on Soft-Measuring Technology

Abstract:

This article raise a new control method to prevent splashing in the process of BOF refining steel, the method is based on soft-sensing technology, use the infrared temperature measurement device installed in the top gun and bottom gun, on-line detect the temperature difference of liquid slag surface and molten steel in the furnace, with the temperature difference we can get FeO content in the liquid slag, according to the degree that occur away from the splashing, temperature range is quantified five intervals, according to fall into the interval based on the temperature difference, adjust the top-gun position and the intensity of supplying oxygen and argon, to control carbon-oxygen reaction rate and FeO content in the slag, add auxiliary material in order to improve liquid slag mobility and oxidation when foam degree of liquid slag is too high or in the “back to dry” interval, in order to prevent splashing.

• Periodical: Advanced Materials Research (Volumes 179-180)
• Pages: 279-284
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.179-180.279
• Online since: January 2011
• Authors: Wen You, Hai Tao Ma, Niao Na Zhang
• Keywords: BOF, Preventing Splashing, Refining Steel, Soft-Measuring

References

[1] Hei-ichiro. Dynamic Refining Control by Analysis of Exhaust Gas. Transaction ISIJ, 1987, 27(5), P351-358.

[2] Ye Jian-song , etc, pre-slag splashing converter cause and countermeasure, Journal of Anhui University of Technology, in July 2009, Vol. 26, No. 3.

[3] Wang San-zhong, BOF splashing of control and preventive measures, Henan Metallurgy, in August 2009, Vol. 17.

[4] HU Zhi-gang, etc, 150t BOF furnace gas analysis using splashes forecasting and control, Steel, in February 2004, Vol. 39, No. 2.

[5] Zou Tao, etc, on the BOF steelmaking process spatter analysis of the phenomenon, Shanghai Metal, in March 2004, Vol. 26, No. 2.