用电厂低品位过热蒸汽制备超细粉煤灰

以四川江油巴蜀电厂低等级干排粉煤灰为原料，以自行研制的蒸汽气流粉碎系统为手段，利用火电厂低品位过热蒸汽，在前期试验所确定的系统优化参数下制备超细粉煤灰，并对产品进行了性能试验。结果表明：过热蒸汽粉碎工艺可以低成本、规模化地对低等级粉煤灰进行超细粉碎，能有效保护粉煤灰的玻璃微珠结构，加剧物料的晶格畸变及无定形化，制备出的超细粉体具有良好的粒径分布和形貌特征，活性提高至125以上，达到混凝土和砂浆用一级粉煤灰的技术要求。

Preparation of Ultra-Fine Coal Fly Ash by Low-Grade Superheated Steam of Power Plant

Ultra-fine coal fly ash was prepared using the low-grade dry coal fly ash discharged from Sichuan Jianyou Bashu Power Plant as the raw material, self-developed steam flow pulverization system, low-grade superheated steam of thermal power plant and optimized system parameters determined in the early experiment. The product performance test was also made. The results show that the superheated steam pulverization process can realize the uhra-fine pulverization of low grade coal fly ash at low cost and large scale, effectively protect the glass micro-bead structure of coal fly ash and intensify the lattice distortion and amorphization of material The prepared uhra-fine powder has good particle size distribution and morphology and its activity index is improved to above 125, meeting the technical requirement for Class A coal fly ash for preparing concrete and mortar.