Lime kiln has advanced structure. The vertical preheat with low-pressure loss can effectively improve the preheating effect, and the in-kiln decomposition rate of the preheated limestone can reach 20-25% and the 10-15 mm fine particle limestone materials can be directly used. Processing limestone to lime by lime kilns. Process Flow. 1.Preheating. Limestone is heated to 900 by the 1150 kiln gas in the preheater of 1000t/d active lime production line. 2.Calcining. Hydraulic push rod of this active lime equipment sends the limestone into the rotary kiln. The limestone is calcined and decomposed into CaO and CO2. 3.Cooling. Main advantages of Active Lime Process Flow Chart 1. Good quality,and high output,suitable for larhbe-scale activity of lime production lime and large-scale production. 2. Stable production,all the production with the negative pressure,air flow and higher security. 3. Simple structure,easy control and beneficial operation and maintenance. 4.