This project is mainly to produce 100,000 cubic meters of pickling sludge (hazardous waste) ceramsite production line, the main equipment of ceramsite rotary kiln, cooler, dryer, roller granulator, feeder, double-shaft mixer and other equipment design, manufacture, installation and commissioning. The project is mainly to process pickling sludge, mix it with waste soil, fly ash, etc. according to a certain proportion, then age it, then granulate and calcinate to form ceramsite. Using the high-temperature reducing atmosphere of the ceramsite kiln can harmlessly and immobilize the pickling sludge, and the products can be used in building materials, pointing out a new process route for the harmless treatment of hazardous waste.