关键词: 固废利用, 铝矾土尾矿, 锂辉石, 抗压强度

Abstract: On the basis of ceramic preparation with reusing of bauxite tailings,explore the influence of melting effect of low grade spodumene on the preparation of mulite-based compound ceramics. The effects of admixture content (0%,2%,5%, 10%) and sintering temperature (850,900,950 ℃ ) on the phase behavior,microstructure and mechanical properties of mullite multiphase ceramics,which are prepared by batching-mixing-drying-forming-sintering were studied. The results show that the main phases of mullite multiphase ceramics prepared by low temperature sintering is quartz,mullite and corundum,increasing sintering temperature is beneficial to mullite formation in both thermodynamic and kinetic aspects. The melting effect of low garde spodumene can increase the high temperature resistant phases of mullite and corundum in the samples,and play a supporting role in the microstructure,which is beneficial to improve the mechanical properties of the samples. The test sample,with the admixture content of 10% and preparation at 950 ℃ for 2 h,was appeared the compressive strength of 47. 0 MPa and the volume density of 1. 77 g / cm³.