A vertical preheater is the host of the active lime equipment 
 1, the main role of the vertical preheater is sent by the upper part of limestone materials to the preheater body, while taking advantage of the high temperature exhaust gas emissions from the kiln calcination (1150 ° C). 
 Preheater materials evenly preheated to about 900 degrees Celsius, 30% CaCO3 decomposed in the preheater preheating process, and then by hydraulic push rod pushed into the calcining rotary kiln. 
 3, the calcination process not only makes the limestone in the kiln calcination time greatly shortened, but also can get a higher degree of activity of the lime