关键词: 钒钛磁铁矿尾矿, 钼尾矿, 萤石尾矿, 仿石陶瓷砖, 低温烧成

Abstract: In order to promote the high-value utilization of tailings resources and develop low-cost and environmentally friendly stone-like building materials，the typical vanadium-titanium magnetite tail⁃ ings，molybdenum tailings and fluorite tailings in Chengde area were used as the main raw materials，sup⁃ plemented by waste glass powder，Na₂CO₃，K₂CO₃ and other additives. The effects of particle gradation and waste glass powder content on the structure and properties of stone-like ceramic materials sintered at low temperature (850 °C ) were systematically studied. The results show that when the mass ratio of large perti⁃ cles(3~2 mm)，middle particles(2~1 mm)，small particles(1~0.075 mm) and fine mud(-0.075 mm) in vanadi⁃ um-titanium magnetite tailings is 25∶10∶5∶20，the internal particles of the sample are tightly packed and the compactness is the best. When the content of waste glass powder is 10%，the bulk density of the sample is 2.24 g/cm³ ，the apparent porosity is 18.21%，the water absorption is 8.14%，and the flexural strength and compressive strength are 13.29 MPa and 29.80 MPa，respectively. The addition of waste glass powder can form more glass phase during the sintering process，effectively promote mass transfer and pore filling，and sig⁃ nificantly improve material properties. The research results provide a feasible process path and theoretical ba⁃ sis for the large-scale application of tailings resources in Chengde area in imitation stone ceramic materials.