Apron feeder is a kind of mineral, coal and other feeding equipment, with good impact resistance and wear resistance, with large processing capacity, low maintenance advantages.
Conveying materials are mainly limestone, sandstone and iron powder, material humidity and viscosity is large, rotary lock air feeder impeller in operation soon sticky material, resulting in a gradual reduction in the amount of feed. The production capacity of our company is up to 300 small, so the impeller must be cleaned every day to meet the production capacity of the raw mill. In addition, the size of the material is not uniform, which is easy to produce blocking and sticking phenomenon, resulting in the halt of the vertical mill. Due to the high failure rate of rotary lock air feeder and the heavy workload of material cleaning, it cannot meet the production. The rotary valve core of the rotary lock air feeder was removed and the raw material was directly put into the mill, which resulted in large air leakage in the raw material mill system and seriously affected the wind used by the raw material mill system and waste heat power generation system. Taking into account the characteristics of conveying materials, we changed the rotary locking air feeder into a medium-sized apron feeder, the model is bl1250x4000mm, the conveying capacity is 350/h, the feeding amount is controlled by frequency conversion speed regulation, which is convenient to adjust the conveying capacity, and the lower part is equipped with a cleaning device. Apron feeder has the advantages of high traction, low power consumption, low wear, smooth operation and easy maintenance. In order to solve the problem of air leakage, we customized the feeder to a fully sealed structure in the factory, and added a bin in the feeder feed tail, with a diameter of φ2500mm and a capacity of 23m3, and the conveyor's feeding port was directly connected to the bin. The lower part of the bin is equipped with a (1000x1000) mm bar valve for adjusting the amount of material: the inside of the bin is equipped with a radar level meter to facilitate the observation of the material condition in the bin, so that the lower part of the bin has the material for a long time, and finally achieve the purpose of wind lock.
After the transformation is completed, apron feeder has no fault, good wind locking effect, feeding capacity up to 320, raw material grinding system produces twice a day, peak power can be stopped, raw material process power consumption 14kwt.