蓝晶石基莫来石对水泥窑用硅莫砖性能的影响

发布时间：2018-09-05 11:07

【摘要】：为了提高水泥窑用硅莫砖的性能尤其是抗热震性能,以不同量和不同粒度的蓝晶石基莫来石等量替代常规硅莫砖配料组成中同粒级的矾土熟料,研究了蓝晶石基莫来石加入量对硅莫砖的体积密度、强度、烧后线变化率、荷重软化温度、抗热震性和热膨胀性能的影响。结果表明:1)随着蓝晶石基莫来石加入量的增多,硅莫砖的体积密度、常温耐压强度、荷重软化温度、热膨胀率等都呈逐渐减小的趋势;但蓝晶石基莫来石的加入大幅改善了硅莫砖的抗热震性,尤其在蓝晶石基莫来石加入量为20%(w)时效果最佳。2)蓝晶石基莫来石的引入对硅莫砖抗热震性的改善,主要与二次莫来石的生成量、发育状况、在基质中的分布以及其高黏度的富硅玻璃相有关。
[Abstract]:In order to improve the properties of Si-Mo brick used in cement kiln, especially the thermal shock resistance, the bauxite clinker of the same size in the composition of conventional Si-Mo brick was replaced by different amounts and different sizes of blue-crystal based mullite. The effects of the amount of blue stone based mullite on the bulk density, strength, linear change rate after firing, softening temperature under load, thermal shock resistance and thermal expansion property of the brick were studied. The results show that the volume density, compressive strength at room temperature, softening temperature and thermal expansion rate of Si-Mo brick decrease gradually with the increase of the amount of blue based mullite. However, the thermal shock resistance of Si-Mo brick is greatly improved by the addition of blue-crystal stone based mullite, especially when the amount of blue stone based mullite is 20% (w). The effect of the introduction of blue crystal stone based mullite on the thermal shock resistance of the brick is improved, especially when the amount of blue crystal based mullite is 20% (w). It is mainly related to the amount of secondary mullite, the development, the distribution in the matrix and the silicon-rich glass phase with high viscosity.
【作者单位】：郑州大学高温材料研究所;河南工业大学材料科学与工程学院;郑州瑞泰耐火科技有限公司;
【分类号】：TQ172.622;TQ175.71

【相似文献】