Research on the Reactivity and Grain Size of Lime Calcined at Extra-high Temperatures via Flash Heating
(0) In low-carbon energy-efficient basic oxygen furnace(BOF)steelmaking processes,limestone partly or completely replaces the active lime.The effects of limestone calcination temperature(1200~1500 °C)and time(5~15 min)on lime reactivity and CaO grain size were investigated.The reactivity was evaluated via titration with hydrochloric acid,and the CaO grain size was analyzed using SEM.The results revealed that the temperature exceeded 1300 °C,the reactivity decrease after an appearance of maximum.The higher temperature is,the earlier the peak of reactivity appears.The CaO grains grow with the increase of temperature and time,which leads to the decrease of reactivity.Notably,the effects of temperature on CaO grain size and reactivity are more remarkable than that of time.To obtain active lime calcined at ultra-high temperature by flash heating,the calcination condition should be at 1300~1400 °C for 10~15 min or at the temperature of 1400~1500 °C for 8~10 min.
limestone calcinations reactivity of lime flash heating ultra-high temperature
Wang Xiaoyuan Xue Zhengliang Li Jianli
The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,China
国内会议
上海
英文
1-8
2015-10-21（万方平台首次上网日期，不代表论文的发表时间）