It mainly includes upper chamber feeding bin and discharging chute. Volume of feeding bin is 450m³. Discharging mode and structure can ensure that feeding to preheater main body can be completely closed, so that external cold air can not enter preheater, and feeding can be realized continuously or intermittently with help of rod valve.

Which is most important part to ensure that materials are preheated to about 900 ℃. It is composed of preheater cylinder, distribution arch, suspension device and refractory brick lining (refractory is not within scope of supply). Most part of main body is steel structure, and some materials are made of heat-resistant steel, which can work at 1000-1100 ℃. In addition, updated design is adopted for structure of refractory brick lining, which can ensure that materials are evenly preheated in preheater and reach preheating temperature.

Which mainly includes push head, frame and connecting rod. Push head is made of heat-resistant steel casting and can withstand high temperature. Through electric control and hydraulic system, eight hydraulic push rods can be operated quantitatively and sequentially as per automatic control program.

Which mainly includes chute, main main body of feeding chamber and feeding dish. Its main function is to introduce preheated limestone into rotary kiln for calcination.

Which mainly consists of columns, ring beams, diagonal bracing rods and etc.. Its main function is to bear weight load of superstructure of preheater, weight of maintenance platform of hydraulic push rod frame, and thrust load of hydraulic push rod in operation.