转炉钢渣制备CMAS系微晶玻璃的实验研究

发布时间：2018-05-20 14:56

  本文选题：钢渣 + 粉煤灰　； 参考：《贵州大学》2015年硕士论文

【摘要】：采用贵州省某钢厂的转炉渣和国内某电厂的粉煤灰,在不添加其它晶核剂的基础上,利用转炉渣和粉煤灰中含有的Fe2O3和TiO2为晶核剂,以烧结法制备出了主晶相为透辉石(Ca(Mg,Fe)Si2O6),副晶相为硅灰石(Ca3(Si3O9)),晶粒尺寸为0.2-0.4μm的钢渣微晶玻璃,大幅度的提高了这两种废物的生产利用率。采用DTA、XRD、SEM等分析手段研究了基础玻璃的析晶行为和微观结构,确定了最优的热处理制度。本实验所采用的钢渣和粉煤灰综合掺量达到63%。研究结果表明:其微晶制备的最优的热处理制度为:核化温度870℃,核化时间2h,晶化温度1150℃,晶化时间2h。获得的微晶玻璃的性能参数为:耐酸性0.14%、耐碱性0.015%、密度2.84g/cm3、抗压强度107.27MPa、抗折强度74.89MPa、显微硬度756.97kgf/mm2。探讨了Fe2+对整个微晶玻璃析晶过程、微观结构和物相结构的影响。当Fe2+含量在3.11%以下时,微晶玻璃的主晶相为钙铝黄长石;当Fe2+含量增加到5.46%时,微晶玻璃的主晶相由钙铝黄长石变为钙镁黄长石;当Fe2+含量增加到7.80%及以上时,微晶玻璃的主晶相由钙镁黄长石转变为透辉石。
[Abstract]:The converter slag of a steel plant in Guizhou province and the fly ash of a power plant in China were used as nucleating agents, and the Fe2O3 and TiO2 contained in converter slag and fly ash were used as nucleating agents without adding other nucleating agents. Steel slag glass-ceramics with the main crystal phase of diopside (diopside), the main crystalline phase of diopside, the apicrystalline phase of wollastonite and the grain size of 0.2-0.4 渭 m have been prepared by sintering method. The utilization ratio of these two kinds of wastes has been greatly improved. The crystallization behavior and microstructure of the base glass were studied by means of DTA-XRDX SEM and the optimum heat treatment system was determined. The content of steel slag and fly ash in this experiment is 63%. The results show that the optimum heat treatment conditions are as follows: nucleation temperature 870 鈩，

本文编号：1915134