Journal of Northeastern University Natural Science ›› 2014, Vol. 35 ›› Issue (2): 236-240.DOI: 10.12068/j.issn.1005-3026.2014.02.019

• Materials & Metallurgy • Previous Articles     Next Articles

Physical Simulation of Bottom Powder Injection in Combined Blown Converter

TANG Biao1, HE Yibo1, ZOU Zongshu1, YU Aibing1,2   

  1. 1. School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China; 2. School of Materials Science and Engineering, University of New South Wales, Sydney 2052, Australia.
  • Received:2013-05-06 Revised:2013-05-06 Online:2014-02-15 Published:2013-11-22
  • Contact: ZOU Zongshu
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Abstract: A cold model of top and bottom blown converter with bottom powder injection was established to investigate the powder distribution and penetration ratio in melt bath. Water, saltcoated hollow alumina particles and vacuumpump oil were used to simulate liquid steel, limestone powder and slag, respectively. The powder distribution under different bottom blowing arrangements was studied by using the image processing method to find out the optimum bottom tuyere arrangement. With the optimum bottom tuyere arrangement, the effects of solid/gas ratio and powder particle size on powder penetration ratio were studied. The results show that the powder penetration ratio increases with the increase of solid/gas ratio and powder particle size. Under the laboratory conditions, the solid/gas ratio of 30~40 and the powder particle size 0212~0380 mm are suggested.

Key words: steelmaking converter, bottom powder injection, powder distribution, powder penetration ratio, solid/gas ratio, powder particle size

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