【摘要】 利用XRD定性分析,确定湿法烟气脱硫石膏的矿物成分.研究结果表明,碳酸盐和磷酸盐含量较多,没有发现CaSO3的特征峰,但在煅烧和高温使用FGD石膏时易挥发重金属Hg、Cd等存在隐患.通过对4种FGD石膏进行不同升温速率(10,20,40℃/min)的热解分析,模拟FGD石膏高温煅烧生产混合相型粉刷石膏和水泥熟料的过程,研究其高温使用过程中的稳定性.更多还原

【Abstract】 The components of FGD gypsum have been ascertained on XRD,the results show that:carbonates and phosphates content is high and the characteristic apex of CaSO3 has not been detected,however,when FGD gypsum is used at high temperature or to be calcined,heavy metals of Hg and Cd may volatilize and hidden trouble still exists.In order to simulate the process of calcining FGD gypsum to produce admixture stucco gypsum and cement stuff,and investigate its stability when used at high temperature,four samples of FGD gypsum have been pyrolysised on a thermogravimetric analyser(TGA) with different heating rate(10,20,40 ℃/min).更多还原