Water modeling experimenton bottom lime injection base fluxes with oxygen into combined blown converter
LIANG Qiang1, CAI Jun2
1. Institute for Metallurgical Process, Central Iron and Steel Research Institute, Beijing 100081, China;
2. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China
Abstract：In order to research the bath mixing characteristics of the combined blowing converter during the bottom lime injection base fluxes with oxygen, a water model of the combined blown converter with bottom powder injection was established to investigate the powder distribution and the melt bath mixing. Water and hollow glass microspheres were used to simulate liquid iron and lime powder, respectively. The powder distribution and the melt bath mixing were studied using the image processing method. The mixing time of powder injection and the mixing time without powder injection were researched using electrical conductivity detection technology in the melt bath under the same carrier gas flow. The results showed that the bottom lame injection could promote the melt bath mixing, and powder diffusion velocity increased with carrier gas flow increasing. The mixing time without bottom powder injection decreased withcarrier gas flow increasing. Under the same bottom blowing carrier gas flow, the mixing time of bottom powder injection in melt bath was shorter than that without powder injection in the combined blown converter, in the experiment range, blending time of bottom powder injection in melt bath appeared minimum at 2 m3/h of carrier gas flow.
梁强, 蔡俊. 复吹转炉底吹氧气和石灰粉水模拟[J]. 钢铁, 2020, 55(5): 26-30.
LIANG Qiang, CAI Jun. Water modeling experimenton bottom lime injection base fluxes with oxygen into combined blown converter. Iron and Steel, 2020, 55(5): 26-30.
 ZHU S J. Kinetic model of desulphurisation by powder injection and blowing in RH refining of molten steel[J].Ironmaking and Steelmaking,2000,27(2):129.  Stiovic T, Kock K. Bottom blowing investigations on a cold model reactor to optimize mixing behavior in metallurgical process[J].Steel Research International,2002,73(9):373.  姚同路,曾加庆,王杰,等. 转炉渣钢间传质的冷态模拟试验[J]. 中国冶金, 2017, 27(3): 12.(YAO Tong-lu,ZENG Jia-qing,WANG Jie,et al. Cold simulation experiment of converter slag-metal mass transfer[J]. China Metallurgy, 2017, 27(3): 12.)  Roth C, Peter M, Schindler M, et al. Cold model investigations into the effects of bottom blowing in metallurgical reactors[J].Steel Research,1995,66(8):325.  张波,吴巍,吴伟,等. 自摆动喷枪喷吹石灰石粉脱磷的水模拟[J]. 钢铁, 2019, 54(1): 28. (ZHANG Bo,WU Wei,WU Wei,et al. Water model of freely swing lance injecting limestone powder to dephosphorization[J]. Iron and Steel, 2019, 54(1): 28.)  巨建涛,韦建庆,刘文果. 钢包底吹氩中非金属夹杂物分布的水力学模拟[J]. 钢铁, 2017, 52(10): 45. (JU Jian-tao,WEI Jian-qing,LIU Wen-guo. Hydraulic model experiment of non-metallic inclusion distribution in a bottom-blown argon ladle furnace[J]. Iron and Steel, 2017, 52(10): 45.)  吴国玺,陈韧,孙丽娜. 铁水包底吹喷粉脱磷预处理技术的可行性研究[J].辽宁科技学院学院,2011,13(4):1. ( WU Guo-xi, CHEN Ren, SUN Li-na. Study on the feasibility of dephosphorization pretreatment with bottom powder injection in the ladle[J].Journal of Liaoning Institute of Science and Technology,2011,13(4):1.)  Trentini B, Allard M. “O.L.P.”: Oxygen, lime-powder injection[J].JOM,1958,10(7):466.  钟甬芳,关立华,林谋胜. 底吹氧气转炉低磷生铁炼钢的工艺[J].钢铁,1979,14(3):37.(ZHONG Yong-fang, GUAN Li-hua, LIN Mou-sheng. The technology of oxygen bottom-blown converter using low phosphorus hot metal[J].Iron and Steel,1979,14(3):37.)  靳宇,崔衡,张建伟. RH精炼底吹工艺优化的物理模拟[J]. 中国冶金, 2019, 29(4): 17. (JIN Yu,CUI Heng,ZHANG Jian-wei. Physical simulation of RH refining bottom blowing process optimization[J]. China Metallurgy, 2019, 29(4): 17.)  于鹏飞,刘小亮,曾加庆,等. 转炉底吹元件非均衡供气搅拌的冷态水模拟[J]. 钢铁, 2018, 53(6): 39. (YU Peng-fei,LIU Xiao-liang,ZENG Jia-qing,et al. Water simulation on mixing of bottom blowing parts with non equilibrium gas supply in converter[J]. Iron and Steel, 2018, 53(6): 39.)  邓开文,钱国钧,杨林章,等. 氧气底吹转炉喷粉吹炼含3%磷的高磷半钢[J].钢铁研究学报,1982,2(1):13.(DENG Kai-wen, QIAN Guo-jun, YANG Lin-zhang, et al. Blowing the pre-treated hot metal containing 3% P in oxygen bottom-blown converter with lime powder injection[J].Journal of Iron and Steel Research,1982,2(1):13.)  蔡俊,曾加庆,梁强,等.冶金用喷粉罐喷粉速率控制的冷态模拟试验[J].钢铁,2019,54(9):57.(CAI Jun, ZENG Jia-qing, LIANG Qiang, et al. Cold state simulation experiment on powder injection speed control of metallurgical dispenser[J].Iron and Steel,2019,54(9):57.)  唐彪,何弈波,邹宗树,等. 复吹转炉底吹喷粉的物理模拟[J].东北大学学报:自然科学版,2014,35(2):236.(TANG Biao, HE Yi-bo, ZOU Zong-shu, et al. Physical simulation of bottom powder injection in combined blown converter[J].Journal of Northeastern University:Natural Science,2014,35(2):236.)  Ajmani S K, Chatterjee A. Cold model study of mixing and mass transfer in LD converters at Tata Steel[J].Ironmaking and Steelmaking,1996,23(4):335.  GUAN Ming-fei, YU Hao. Fatigue crack growth behaviors in hot-rolled low carbon steels:a comparison between ferrite-pearlite and ferrite-bainite microstructures[J].Materials Science and Engineering:A,2013,559(1):875.  蔡志鹏,梁云,张春霞. 化工冶金模型实验研究及其测试技术[M].北京:冶金工业出版社,2001.(CAI Zhi-peng, LIANG Yun, ZHANG Chun-xia. Experimental Study on Chemical Metallurgical Model and Its Testing Technology[M].Beijing:Metallurgical Industry Press,2001.)  蔡俊,曾加庆,梁强. 复吹转炉顶吹枪位与非均衡底吹搅拌的水模拟[J]. 中国冶金, 2019, 29(10): 26.(CAI Jun,ZENG Jia-qing,LIANG Qiang. Water simulation of combined blowing converter for top lance level and non equilibrium bottom blowing stirring[J]. China Metallurgy, 2019, 29(10): 26.)