Abstract: To solve the environmental pollution of zinc slag stack in Huili,at the same time,according to the high content of lead and zinc,the zinc residue and sodium sulfide were added to the bar mill for curing and flotation.The parameters of the process of rod mill vulcanization and flotation were determined by condition test.Then,leaching toxicity tests were conducted on the flotation tailings,which also was used to prepare sulfur building materials.The results show that the sulfuration rate of both Pb and Zn can surpass 90% at the optimum conditions; the sulfur concentration contain 65.26% S,with S recovery of 78.14%,the Pb concentration contain 45.29% Pb with Pb recovery of 80.02% and the Zn concentration contain 41.02% S with S recovery of 70.14% could be obtained.the leaching toxicity of the heavy metals in the flotation tailings meet the corresponding National Standard.The sulfur building material with 45 MPa compressive strength and 1% water absorption could be prepared using the tailings.The stabilization and tailless comprehensive utilization of zinc slag were finally completed.

Key words: Zinc slag, Mechanical-sulfuration, Flotation, Building material