The industrial rotary drum dryer is mainly composed of a rotating body, a lifting plate, a transmission device, a supporting device and a sealing ring. The working principle is that the slag is sent to the hopper by the belt conveyor or the bucket elevator, and then enters the feeding end through the feeding pipeline through the feeding machine of the hopper.

Rotary kiln refers to rotary calcining kiln (commonly known as rotary kiln), which belongs to building materials and equipment. Rotary kiln can be divided into cement kiln, metallurgical and chemical kiln and lime kiln according to different materials. Cement kilns are mainly used to calcine cement clinker, which are divided into dry cement kilns and wet cement kilns.