Study on Leaching Behavior of Heavy Metals from Cement Produced by the Burn of Waste Containing Heavy Metals

Leaching experiment on crude material and clinker was studied for the understanding of heavy metal's characteristics and environment security in the treatment process of hazardous wastes in cement rotary kiln,and leaching concentration and extraction rate were compared.Result indicated heavy metals were leached with very low concentration in seven research subjects,and heavy metals from clinker had a higher immobilized ratio and lower leaching rate than that from the raw material.The security of cement product by the burn of wastes containing heavy metals was guaranteed in the actual application as to heavy metal index.