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Optimal calcining time and temperature for calcining lime in a new environmentally friendly lime kiln
October 05, 2018 admin

The high activity of lime has an inseparable relationship with its preheating temperature, time, and calcination temperature and calcination time. The following are the conclusions of several sets of experimental data.


(1) When the preheating temperature is 600 ° C and 700 ° C, as the preheating time of limestone is extended, the range of the calcination temperature and time corresponding to the highest activity becomes wider. When the calcination temperature is 1100-1150 ° C, it is active. Calcination temperature range for the highest activity of lime.


(2) When the preheating temperature is 700 ° C, it is the preheating temperature corresponding to the highest degree of activity. When the preheating time is 45min, and the holding time is 5min and 10min, the highest value of activity appears when the calcination temperature is 1150 ° C; When the holding time is 15min and 20min, when the final calcination temperature is 1000-1150 ° C, the activity of the active lime reaches the highest value; but when the preheating time is increased to 60min, regardless of the holding time in the calcination period, the calcination of the highest activity The final temperature is 1100-1150 ° C. The maximum activity of this group of lime experiments is 410ml, the corresponding preheating time is 45min, the calcination temperature is 1150 ° C, and the calcination time is 15min.


(3) When the preheating temperature is 800 ° C, the calcination conditions to obtain the highest degree of activity start to be difficult to control. When the preheating time is short, the range of the calcination temperature corresponding to the highest activity becomes smaller, and when the preheating time is long, the obtained The highest activity is only 360ml, and the corresponding calcination temperature is 1150 ° C, and the calcination time is only 5min.


(4) When the preheating temperature is 900 ° C, to obtain a high degree of activity, the entire calcination conditions become more difficult to control. This preheating temperature is not recommended during limestone calcination.


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