3、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. Thebestratioofraw
4、materialsandproductionprocesses wereexploredby changingthe content ofbinder,sinteringtemperatureandholdingtime. The lightweightporousmaterialswereusedasbiomediuminbiologicalaeratedfilterandeffectofwatertreatmentwasevaluated. Theresultsshowthat : lightweightporousmineralmaterialscanbe
5、successfullypreparedbysintering 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,crushingforce was 0.802k
6、N,waterabsorptionrate was 4.80%, andthedissolutionratebyhydrochloricacid was 0.67%.TheBAFreactorwiththelightweightporousmaterialsservingasthebiomediumachievedhighremovalefficienciesfor 85%of COD. The lightweightporous materialhasgood wastewatertreatment effect.Keywords:IrontailingsMi