富含硅铝的工业灰渣合成沸石的研究进展  

Research progress on the synthesis of zeolite from industrial ash rich in silicon and aluminium

作　　者：马慧 徐德福[1] 李伯启 薛震[3] 王金光[3] 薛飞 张军[3] 刘兆飞 MA Hui;XU Defu;LI Boqi;XUE Zhen;WANG Jinguang;XUE Fei;ZHANG Jun;LIU Zhaofei(School of Environmental Science and Engineering,Nanjing University of Information Science and Technology;Jiangsu Xinda Ruikang Environmental Protection Technology Co.,Ltd.;Jiangsu Jinmei Hengsheng Chemical Co.,Ltd.)

机构地区：[1]南京信息工程大学环境科学与工程学院 [2]江苏信大瑞康环保科技有限公司 [3]江苏晋煤恒盛化工股份有限公司

出　　处：《环境工程技术学报》2022年第5期1660-1667,共8页Journal of Environmental Engineering Technology

基　　金：江苏省自然科学基金项目(BK20141477);江苏高校“青蓝工程”项目(20161507);江苏省“六大人才高峰”项目(JNHB-057)。

摘　　要：沸石是一系列多孔硅铝酸盐材料的统称,因其具有较高的阳离子交换能力,作为吸附材料广泛应用于污水的净化和催化合成化学品等多个领域。燃煤灰渣、煤气化灰渣、铸造灰渣等工业灰渣含有大量的Si、Al元素,可以作为合成沸石的主要原料,达到资源化利用这些固体废物的目的。分析了燃煤灰渣、煤气化灰渣和铸造灰渣的形成和来源,对比三者的化学成分发现,燃煤灰渣的化学成分含量表现为SiO_(2)>Al_(2)O_(3)>Fe_(2)O_(3)>CaO,煤气化灰渣的烧失量比较高,可达36.1%,铸造灰渣的硅铝比显著高于煤气化灰渣和燃煤灰渣。目前,3种灰渣中,燃煤灰渣的研究和利用比较多,而铸造灰渣和煤气化灰渣相对较少;铸造灰渣的Al_(2)O_(3)和SiO_(2)的总含量比较高,烧失量和金属氧化物含量较低,是一种合成沸石的优质原料,可合成高品质沸石;煤气化灰渣的残碳含量比较高,在考虑煤气化灰渣Si、Al回收和利用的同时,还应充分考虑其残碳的资源化利用。A series of porous silicon aluminate materials is defined as zeolite,which is widely used in sewage purification,catalytic chemical synthesis and other fields due to its higher cation exchangeability.Coal ash,gasification ash,casting ash,and other industrial ashes may be used as the main raw materials for the synthesis of zeolite because they contained a large number of Si and Al elements,to achieve the purpose of resource utilization of these solid wastes.The formation and sources of coal ash,gasification ash and casting ash were analyzed.By comparing their chemical composition contents,it was found that the chemical composition contents of coal ash followed the order of SiO_(2)>Al_(2)O_(3)>Fe_(2)O_(3)>CaO.The ignition loss of gasification ash was 36.1%,which was relatively higher,and the ratio of Si to Al was significantly higher in casting ash than those in gasification ash and coal ash.At present,among the three kinds of ashes,more research and utilization work had been done for coal ash,while less had been done for casting ash and gasification ash.The total content of Al_(2)O_(3) and SiO_(2) in casting ash was relatively high,and its loss on ignition and metal oxide content was low.Casting ash was a high-quality raw material,which could be used to prepare high-quality zeolite.In addition to considering the recovery and utilization of Si and Al of gasification ash,its residual carbon should be fully utilized because the residual carbon content of gasification ash was relatively high.

关 键 词：燃煤灰渣 煤气化灰渣 铸造灰渣 沸石 资源化利用 

分 类 号：X705[环境科学与工程—环境工程]