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1、~AbstractThemaincomponentofcalciumcarbideresiduewasCa(OH)2,anditalso
includedsomeSiO2,Fe2O3,MgO,Al2O3,etc.Itwasahotpointofstudyonthe
preparationofhighvaluedcubicalcrystalnano-sizedcalciumcarbonatefromcalcium
carbideresidue.Calciumcarbideresiduewasaside-productproducedintheprocess
ofacetylenewith
2、calciumcarbide.Calciumcarbideresiduewasmainlyusedin
smoke-desulfurizing,cement-manufacturingandsoon.However,withthespringup
ofresearchandapplicationofnanometermaterial,theusedvalueofcalciumcarbide
residuewasimprovedgreatlybythepreparationofnano-sizedcalciumcarbonate.
Asasortofcheapandhigh-qualit
3、ypaddingandwhitepigment,thecalcium
carbonatehasbeenwidelyusedinmanyindustries,forexample,plastic,rubber,
papermaking,coating,commoditychemistryandsoon.Especially,thenanometer
calciumcarbonatecanenablethephysicalperformanceofproducttogetanenormous
improvement.Thereforethepreparationofnano-sizedca
4、lciumcarbonate,whichhasa
bigmarketdemand,willbecomeagoodapproachofthecomprehensivetreatmentsof
calciumcarbideresidue.Nano-sizedcalciumcarbonatewithrelativelyintactcubicalcrystalshapewas
preparedfromcalciumcarbideresiduebythemethodoftraditionalbubbling
carbonizationinastirredtankreactor.Effectsof
5、theratioofwater,ammonium
chloride,additivewiththecalciumcarbideresidue,andtheconcentrationofaqueous
ammoniaandthetemperatureofcarbonizationreactionwereinvestigatedwith
experiments.Atthesametime,theflowvelocityofCO2andthestirringspeedin
carbonizationreactionswerestudied.Throughthemeasurementandch
6、aracterization
ofCaCO3productwithXRD,SEM,BETanalyses,theobtainedCaCO3productwas
ofcubicalcrystalnano-sizedcalciumrestructurewitharange30-80nmgranularity
and50-60m2/gspecificsurface.Theresultsshowedthatitwasbenefitedforthe
formationofcubicalnano-sizedcalciumcarbonateatthesuitablytemperature,stirr
7、ing
speed,theflowvelocityofCO2andelectionofadditive.Theresultsofresearchshow
thattheimpurityofinfusibilityandmetalionhasbeenremovedafterthecourseofthe
calciumcarbideresidueresolvedinwaterandammoniumchloride,andtheyieldof
CaC
