Abstract:
The comprehensive utilization of tailing resources in China has always been a challenge. Alkali-Aluminum-Siliceous tailings in Shanxi were used as the main raw material for the preparation of high strength ceramsite. The relationship among the material properties, the ratio of raw materials, grinding fineness, and L
16(4
5) orthogonal research of sintering system were studied based on the chemical analysis. Comprehensive optimization program, to determine the optimal firing system:The final tailings fired ceramic tailings light aggregate bulk density of 874 kg/m
3, cylinder pressure reached 7.5 MPa, water absorption of 2.1%, for the high value-added comprehensive utilization of copper tailings provides a new solution.The results showed that the optimum formula was as follows:50% of copper tailings, 25% of feldspar, 10% of dolomite, 15% of waste soil and 5% water glass was 5%. Based on these tests, the optimal firing system was determined as follows:preheating temperature of 800℃, preheating time of 20 min, firing temperature of 1 170℃ and firing time of 15 min. The bulk density of the final tailing ceramsite lightweight aggregate was 874 kg/m
3, the compressive strength reached 7.5 MPa, and the water absorption rate was 2.1%. Therefore, this study provided a new solution for the high value-added and comprehensive utilization of copper tailings.