据江苏省燃煤电厂粉煤灰的实测资料,其颗粒以0.005-0.05mm为主。<0.1mm部分占80％以上,0.005-0.25mm占95％以上。其中0.05-0.25mm和0.005-0.05mm部分,各厂因燃烧程度和排放因素或取样位置不同相差较大。 灰浆排放过程中,粉煤灰中的CaO溶解在灰水中,使灰水中Ca~(++)增加, pH值升高( 9 According to the measured data of fly ash in coal-fired power plants in Jiangsu Province, the particles are mainly 0.005-0.05mm. <0.1mm accounts for more than 80%, and 0.005-0.25mm accounts for more than 95%. Among them, 0.05-0.25mm and 0.005-0.05mm parts, each plant has a large difference due to the degree of combustion and emission factors or sampling locations. In the process of mortar discharge, CaO in fly ash is dissolved in grey water, which increases the Ca~(++) in the grey water and raises the pH ( 9