关键词: 石煤提钒尾矿, 免烧砖, 抗压强度

Abstract: To seek for an effective proposal on utilization of vanadium extracted tailings from Shaanxi Wuzhou Mining Company，and based on the analysis of physical and chemical properties of the tailings，experimental research on preparation of unfired bricks with the tailings was made. The results showed that parts of the tailings were processed into tailings powder with particle size of -0.088 mm. After that，with the mass fraction of original tailings，tailings powder，cement of 65%，27%，8% as dry solid compound respectively，the mass ratio of water and dry solids of 8%，and under the molding pressure of 15 MPa，the unfired bricks with compressive strength of 30.43 MPa，bulk density of 2.15 g/cm3，porosity of 11% and water absorption of 5% at 28 d were prepared. Its strength meets the requirement of MU25 products on the standard for “JC/T 422-2007 Waste Tailings Non-sintered Bricks”.

Key words: Vanadium extracted tailings from stone coal, Unfired bricks, Compressive strength