Adopting air swept coal mill wind for grinding powder, and reducing the pulverized coal fineness, plays a crucial role in the cement rotary kiln production line, is proportional to the burnout time of the pulverized coal and grain diameter of quadratic, pulverized coal combustion. The smaller the pulverized coal fineness is, the larger the pulverized coal specific surface area is, the greater the pulverized coal with oxygen in the air is, the greater the contact area can reduce the ignition temperature, combustion is easier.

When Cement rotary kiln equipment production line uses low heat value and poor coal, it is important to reduce the pulverized coal fineness (recommended control in 2% or less). Low calorific value and inferior high ash content (> 35%), the content of coal gangue is big, and grindability is poor. If using vertical roll grinding to powder grinding, scumming phenomenon is serious, it is difficult to achieve desired fineness, and adopting the wind swept grinding fineness (tube mill) can guarantee tomeet the requirements . Choosing the air swept coal mill should fully consider the grinding ability, the system of air swept coal mill in modern large-scale cement rotary kiln equipment is simple, reliable technology, high rates of operation, with efficient classifier flexible adjustment etc. which is widely adopted, increasingly large-scale and specifications, low calorific value of this is also for grinding of inferior and anthracite requirements. Air swept coal mill in cement rotary kiln equipment system must have drying ability and grinding capability, namely, according to the raw coal easy grinding and moisture increase grinding length of warehouse and dry warehouse, otherwise it will restrict system output, under the condition of the big raw coal moisture content, try to improve the feeding temperature and the discharging temperature and the discharging  temperature should be controlled at 75 ℃to 80 ℃.