Modelling the Effect of MnO on Slag Properties and Mn,Si and S Distribution in Blast Furnaces
A thermodynamic package: Multi-Phase Equilibrium (MPE) software developed by CSIRO was used to model the blast furnace slag and investigate the effects of MnO, Al2O3, MgO and basicity variation on liquids temperature and viscosity of the slag. It was found that addition of MnO to the blast furnace slag would extend the solubility limit of Al2O3 while decreasing the liquidus temperature and viscosity. Results from metal-slag equilibrium experiments and MPE calculations at temperatures close to 1450 ℃ showed that under equilibrium conditions, most of MnO added was reduced to Mn and reports to the carbon saturated hot metal. Higher level of Mn in the hot metal also resulted in lower silicon contents in the metal, which has some beneficial effects during the conversion of hot metal to steel. Results from kinetic experiments at 1500 ℃ have shown that reduction of MnO by carbon saturated iron is much slower than reduction of FeO Thus higher level of MnO could be present in the slag in the blast furnace than the equilibrium value. The higher level of MnO in the slag has a number of beneficial effects including lowering of liquidus temperature and viscosity of slag as well as increasing its capacity for S and Si.
blast furnace MPE, melting temperature viscosity equilibrium distribution high alumina iron ore
CHEN Chun-lin ZHANG Ling WRIGHT Steven SUN Shou-yi JAHANSHAHI Sharif HONEYANDS Tom
CSIRO Minerals, Box 312, Clayton South, Victoria, 3169, Australia BHPBilliton, Newcastle Technology Centre, Shortland, NSW, 2307, Australia
国际会议
The 5th International Congress on the Science and Technology of Ironmaking(第五届国际炼铁科技大会 ICSTI09)
上海
英文
1120-1124
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）