1、Resource utilization Using solid waste to produce ceramsite can not only replace clay to produce ceramsite, save land and turn waste into treasure. At the same time, high temperature sterilization and solidification of heavy metals can avoid pollution. 2、Energy saving and environmental protection The solid (hazardous) waste treatment can achieve the four goals of harmlessness, reduction, stabilization and resource utilization. According to the different properties and characteristics of ceramsite raw materials, the ceramsite granulation process mainly includes: rotary kiln process for granulation outside kiln, rotary kiln process for granulation in kiln, rotary kiln process for grinding and pelletizing, rotary kiln process for crushing granulation (dry process), sintering machine process, etc. In addition, electroplating sludge and clay materials are used as raw materials to produce sludge clay ceramsite by rotary kiln granulation process. It is also possible to produce sintered ceramsite only with electroplating sludge to achieve the purpose of solid waste treatment.

The semi-finished product particles are fed into the kiln through the chute at the kiln tail of the preheating kiln. Due to the inclination and slow rotation of the cylinder, the semi-finished particles roll along the circumference on one side and move from the preheating kiln tail to the kiln head along the axial direction; the fuel is sprayed into the kiln through the burner from the kiln head for combustion, and the heat is transferred to the semi-finished product particles by radiation, convection and conduction In the process of moving, after drying and preheating, the particles enter the baking kiln for roasting, and complete a variety of physical changes and chemical reactions to form ceramsite, which is discharged from the end of the kiln head into the cooler. The high temperature flue gas enters the dust removal system from the tail end of preheating kiln.