Currently, about 85% of the world using petroleum coke calcining Rotary kiln.Two or three makeup air unit Rotary kiln is mainly to provide oxygen to the Rotary kiln burning petroleum coke, and can be adjusted by two or three fan speed to achieve the process conditions on the Rotary kiln process operation. But because two or three wind often leak and affect the smooth production of the device, resulting in huge losses.To influence around the Rotary kiln technology to better study the tertiary air removal in feed rate, Rotary kiln speed remains unchanged and no additional fuel situation, only the secondary air system and a large Rotary kiln induced draft fan speed to do adjusted accordingly, because no amount of air in the Rotary kiln after three wind is obviously insufficient, then only adjust the secondary air to the air flow.