Effects of combustion conditions on the characteristics of fly ash and slag in coal-fired power plants
WEI Shaoqing
TIAN Xiuqing
YANG Fengling
CHENG Fangqin
Abstract：In order to expand the comprehensive utilization of fly ash and slag from power plant,in this paper,fly ash and slag produced from combustion of low volatile coals in different types of boilers under different conditions were studied.To investigate the effectofcombustion conditionson the characteristics of fly ash and slag,the physical and chemical characteristics were analyzed by inductively coupled plasma (ICP),X-ray diffraction (XRD),physical adsorption instrument (BET),thermogravimetric analysis (TG-DTG) and scanning electron microscopy (SEM),etc.The results show that the effects of coal variety and boiler type on physicochemical propertiesof fly ash and slag are obvious,while the effects of operatingload of same type boiler onchemical composition,mineral matters and microscopic morphology of fly ash and slag are negligible.The characteristics of fly ash and slag are different,which is due to the difference of PC,CFB and WFB combustion temperature and the influence of coal quality.
Keywords：coal-fire power plantfly ashslagphysical and chemical characteristicboiler style
Publication Date：2017-01-01