Study on the reactivity of lime fast calcined at high temperature

The effect of temperature and time of calcination as well as different type of the test pieces on the reactivity of the fast calcined lime has been researched in the laboratory.Research results show that provided that the limestone with size 12～15 mm is calcined at the temperature from1 300 ℃ to 1 400 ℃ for 7 minutes,the reactivity of lime is higher than 335 mL and it will increase with the calcining temperature.When the calcining time is more than 12 minutes the overburning of lime calcined at temperature from 1 300 ℃ to 1 400 ℃ appears and the reactivity of lime obviously decreases.Increasing the size of limestone will decrease the reactivity of lime.If the limestone sample calcines at 1 400 ℃,the cylindrical sample pressed with limestone fines is more easily overburning contrasting to grain limestone sample.