Coupled reaction kinetics of duplex steelmaking process for high phosphorus hot metal
Duplex steelmaking process has been proven to be an effective solution for the utilization of high phosphorus iron ore, yet systematic analyses of the dephosphorization rate and mechanism of duplex melting for high phosphorus hot metal were seldom reported. In the present work, based on the kinetic model proposed by Robertson, a modified coupled reaction kinetic model was formulated firstly. Moreover, the dephosphorization process of duplex melting for high phosphorus hot metal was analyzed by the established model. A series of experiments were carried out to validate the accuracy of the established model and the calculated results showed a good agreement with the experimental data. Effects of components of both hot metal and slag on the interfacial oxygen activity during dephosphorization were discussed. It was found that a higher content of FeO in slag and lower concentration of C, Si and Mn in hot metal would contribute to a larger value of interfacial oxygen activity. The results indicate that the concentration of Si in the high phosphorus hot metal should be limited at an appropriate value due to the period of dephosphorization is relatively long and the oxidation of silicon is prior to that of phosphorus. Some parametric study was conducted to make a further discussion of the mechanism of duplex steelmaking process for high phosphorus hot metal.
High phosphorus hot metal duplex melting process coupled reaction kinetics
Xie ZHANG Bing XIE Jiang DIAO Chengqing JI
College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P. R. China CISDI Engineering CO. LTD, Chongqing 400000, China
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-13
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）