Cement Raw Material Mill Recirculation Fan by Xianrun Blower

Cement Raw Material Mill Recirculation Fan by Xianrun Blower

Raw material mill recirculation fan plays a big role in cement raw material mill system, it can control the following parameters of mill system by adjusting the circulation fan:

Industrial Fans and Blowers for Cement Plant

1. Airflow in raw material mill: vertical mill is swept by the wind, so needs appropriate air volume. If air flow is insufficient, qualified raw material can not be taken out by recirculation centrifugal fan timely; material layer thickness will increase; slag discharge quantity increase; equipment load is high; so output decrease. While if the air volume is too large, material layer thickness will be too thin to influence the raw material mill the stability operation. 

Industrial Fans and Blowers for Cement Plant

2. Material layer thickness: material bed stable operation is important to vertical mill stable operation. Only material layer is stable, air volume, air pressure and feeding volume can be stable. Otherwise it needs to adjust airflow and feeding volume to maintain material thickness. Improper adjustment will cause shock, motor load rise or system tripping, etc. 
3. Mill vibration: vibration is ubiquitous in ring-roller mill working, if the vibration is too large, will cause mechanical damage of mill plates, roller and lining plate. 

Industrial Fans and Blowers for Cement Plant

4. Pressure difference in mill: pressure difference refers to the pressure loss in centrifugal fan vane. During mill operation, grinding mill load has changes, not only on the electric current, material thickness, and vibration amplitude, but also the pressure difference. 
5. Mill outlet temperature: recirculation centrifugal fan can control outlet temperature effectively, what is more, it can keep good drying and grinding operation conditions. 
6. Product fineness: recirculation centrifugal fan air volume also has a certain influence on the size of the fineness.