... raw material was fed to the rotary kiln, then come out to be the LWA. It is widely used in metallurgy, garding , chemical, ... for pellet making, and then feed to the trommel screen to select the right size calcinations in the kiln, while the size which ... back to pellet again. Materials stocked in the hopper, carried out by conveyor to the rotary kiln for calcination, and after came out, fed to the ...