3、业大学2015届本科毕业论文毕业设计（论文）外文摘要TitleStudyonPreparationandpropertiesoflightweightporousmaterialsofmineralAbstractThe lightweightporousmaterials was preparedwhichused irontailings asthemainmaterial,attapulgiteasbinder,carbonpowderaspore-formingagent, calciumcarbonate asfluxingagent. Th
4、ebestratioofrawmaterialsandproductionprocesses wereexploredby changingthe content ofbinder,sinteringtemperatureandholdingtime. The lightweightporousmaterialswereusedasbiomediuminbiologicalaeratedfilterandeffectofwatertreatmentwasevaluated. Theresultsshowthat : lightweightporousm
5、ineralmaterialscanbesuccessfullypreparedbysintering temperature at550℃, holding 15minutes, then at 1130℃ holding 30minutes,which theratioof icontailings, palygorskite,toner,andcalciumcarbonate were 5:0.33:1.719:0.4.Theapparentdensity of lightweightporousmaterials was 1.1160g/cm3
6、,crushingforce was 0.802kN,waterabsorptionrate was 4.80%, andthedissolutionratebyhydrochloricacid was 0.67%.TheBAFreactorwiththelightweightporousmaterialsservingasthebiomediumachievedhighremovalefficienciesfor 85%of COD. The lightweightporous materialhasgood wastewatertreatment
