油页岩灰渣酸法制备聚合氯化铝煅烧及聚合工艺研究  

Process of calcination and polymerization for preparing polyaluminium chloride by acid leaching from oil shale ash

作　　者：牛显春[1] 谭丽泉[1] 马志亮[1] 周建敏[1] 余梅[1] 

机构地区：[1]广东石油化工学院,广东茂名525000

出　　处：《工业用水与废水》2015年第5期50-52,共3页Industrial Water & Wastewater

基　　金：2012年广东省科技计划项目(2012B031000020);2013年广东省科技计划项目(2012B021000011);2011年广东省科技计划产学研项目(2011B090300105);2011年广东省茂名市科技计划项目(11A36);2012年广东省茂名市科技计划项目(20121301042)

摘　　要：以油页岩灰渣为原料,采用酸溶法制备聚合氯化铝。由于煅烧破坏灰渣的晶体结构,将低活性晶体物质Al_2O_3转化成高活性的γ-Al_2O_3,从而影响到铝浸出率及盐基度;聚合温度影响了OH-与氯化铝的聚合度,从而影响到盐基度。试验考察了煅烧及聚合条件对铝浸出率与盐基度的影响,结果表明,在煅烧温度为750℃,煅烧时间为2 h,聚合温度为90℃的最佳条件下,铝浸出率为73.65%,盐基度为68.73%。Using oil shale ash as the raw material, polyaluminium chloride （PAC） was prepared by acid leaching process. As the calcination process undermined the crystal structure of the ash, which transformed low-activity crystal Al2O3 into high-activity γ-Al2O3, the aluminum leaching rate and alkalinity degree were influ-enced. The polymerization temperature affected the polymerization degree of OH- and Al2O3, and then, affected the alkalinity degree also. The influence of calcination and polymerization condition on aluminum leaching rate and alkalinity degree was investigated, and the optimal condition was as follows： the calcination temperature and time were 750℃and 2 h respectively, the polymerization temperature was 90℃. Under the above condition, the aluminum leaching rate and alkalinity degree were 73.65%and 68.73%respectively.

关 键 词：油页岩灰渣 聚合氯化铝 酸溶法 浸出率 盐基度 

分 类 号：X703.5[环境科学与工程—环境工程]