大型干法水泥窯用無鉻耐火材料與窯料的反應(yīng)機(jī)理研究.pdf

1、西安建筑科技大學(xué)碩士學(xué)位論文大型干法水泥窯用無鉻耐火材料與窯料的反應(yīng)機(jī)理研究姓名：師素環(huán)申請學(xué)位級別：碩士專業(yè)：材料學(xué)指導(dǎo)教師：李勇蔣明學(xué)20060601tn■‘：t，西安建筑科技大學(xué)碩士學(xué)位論文InvestigationintothereactionmechanismofclinkertochromefreerefractoriesusedinlargescaledryprocesscementrotarykilnSpeciality

2、：MaterialScienceApplicant：ShiSuhuanSupervisor：LiYongJiangMingxueAbstractInthispaperthewearmechanismofdirectbondedmagnesiachromebricksandmagnesiaspinelbricksusedintheburningzoneandthetransitionzonerespectivelyforthelarges

3、caledryprocesscementrotarykilnofHuaxinCementCoLtdwasanalyzedThepropertiesandthemicrostructureaSwellastheslagresistanceoftheseenvironment—friendlyrefractorieswereinveatigatedinordertosubstitutetheimportedproductsandimprov

4、ethelininglifeThemaincorrosionmechanismofcementelinkeronthelowchromemagnesiachromebrickandthemagnesiaspinelbricksistheformationoflowsmeltingcompoundscausedbythereactionbetweencementclinkerandcomponentsinthebrickTheinfilt

5、rationanddepositionofalkalisaltsintheformofvapororliquidwillgraduallyresultinacompletefillingoftheapparentporeandbrickdensification～Besidesthefillingofapparentpore，themaincorrosionmechanismofalkalisaltsonthelowchromemagn

6、esiachromebrickistheformationofK2Cr04andsulphateswhichisformedthroughthereactionofalkalisaltsandmagnesia／chromeAndthentheymigratetOthecoldfacetogetherwithothersaltswhichresultsinthestructurebrittleofthehotfaceTheresearch

7、onthebricksafterbeingusedinthelargescaledry—processcementrotarykilnshowedthatthemainwearmechanismcouldbetheCOactionoftherma】shockandchemicalcorrosioncausedbytheattackofclinkerandtemperaturefluctuationTherefore，theimprove

8、mentoftoughnessandspallingresistanceisthemainmeasuretoimprovethelininglifeTheseresultsshowedthat：thedirectbondedstructurewouldbedestroriedbytheformationoflowsmeltingcompoundscausedbythereactionbetweencementclinkerandcomp