The Study Of Preparation Technology On Cordierite-Based Porous Ceramic Material For High Temperature Dust Gas Purification

High temperature dust exhaust gas is very difficult to control due to it s high temperature(?450?),fine dust particles(1?m-10?m)and complex components,high purified standard(<50mg/m3).etc.The limitations of the traditional dust catcher technology can not demand high standards of environmental protection requirements and surplus heat utilization at the same time,and resulting in high temperature dust exhaust gas purification treatment become an obstacle to the sustainable development of the industry.Cordierite-based porous ceramic material for high temperature dust gas purification was prepared by means of cordierite as main material,and with kaolin,burnt talc,alumina and pore-forming agents,etc.Effects of batch formula composition,particle grade of cordierite,different kinds of pore-forming agents and adding content and firing system on performances of cordierite-based porous ceramic material by SEM,XRD,mercury injection apparatus,material testing machine,etc.And using the optimized batch formula composition and technology parameters,honeycomb ceramic(150×150×300mm in dimension size,625 orifice),and it s performances can meet the requirements of high temperature dust gas purification.The results that when cordierite 70?90wt.%(big particle 20 wt.%,middle particle 40wt.%and small particle 20wt.%,respectively),Suzhou kaolin 8?12wt.%,burnt talc 5?10wt.%,alumina 2?4wt.%,pore-forming agent 2?2.2wt.%firing system 1360?×45min,prepared pore ceramic material owns good performances,namely,porosity>42%,bending strength>25MPa,good thermal shock performance(RT-850?)and pore size 10?20?m,and it s performances can meet the requirements of high temperature dust gas purification.