Coal mining scraper conveyor uses internal friction to ensure the stable state of the material. Therefore, it is a more important issue to adjust the proper clearance between the scraper and the bottom plate of the machine tank, which affects the service life and conveying efficiency of the coal mining scraper conveyor.
Obviously, the gap is too small, and the clinker is likely to be caught between the scraper and the machine slot, causing damage to the scraper or the bottom plate of the machine slot. In severe cases, even the chain break accident of the scraper conveyor occurs. If the gap is too large, the conveying efficiency is reduced. The gap size depends on the grain size of the clinker and is generally determined by the following formula:
A> D / 2 + 5 where A represents the gap (mm) between the scraper and the bottom groove plate; D represents the maximum particle size (mm) of the clinker.
The clinker calcined in the rotary kiln is cooled by the grate cooler. After the hammer crusher is crushed, the maximum particle size is about 25mm. Controlling the gap between the scraper and the bottom groove plate is more than 17.5mm, which can reduce the bottom groove plate and the scraper plate. Wear, extend the life of the scraper conveyor.
