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4623201812GuangzhouChemicalIndustryVol.46No.23Dec.2018530023pH、、。pHpH=12.53.5hF－10mg/L。。X522B1001－9677201823－0072－031990－、。StudyonTreatmentTechnologyofFluoride－containingAlkalineWastewaterfromMonaziteSmeltingGOUＲuiMENGYing－xiaQINXue－fengHUANGChao－guanGuangxiＲesearchInstituteofMetallurgyCo.Ltd.GuangxiNanning530023ChinaAbstractTherelationshipbetweentheconcentrationoffluorineionsandpHandtheeffectofcarbideslagadditionstirringtimeandalkalinityonfluorideremovalratewerestudiedbyusingcarbideslagforthetreatmentoffluoride－containingalkalinewastewaterfrommonazitesmelting.Atreatmenttechnologyoffluoride－containingalkalinewastewaterfrommonazitesmeltingwasestablished.TheresultsshowedthatthelargerpHvalueinalkalinewastewaterthehigherfluoridecontent.FurthermorewhenpH=12.5andthestirringtimewasmorethan3.5hthebestfluorideremovaleffectwasobtained.ThecontentofF－intreatedwastewaterreachedthenationalwastewaterdischargestandard10mg/L.Thetreatmenttechnologyoffluoride－containingalkalinewastewaterwithcarbideslaghadgoodeffectandlowcostanditcanachieveresourcerecyclingandbewidelyusedinthetreatmentoffluoride－containingalkalinewastewater.Keywordscarbideslagmonazitefluoride－containingalkalinewastewater28%1。。La～LuYPO4ThO2U3O8ThO212%2。3－4。5。HFSO26。600mg/L10mg/L。。、、、、。HFF－。7、8、9、10、1112。。pH、、。。11.1YP2001PHS－3CPXS－215SHA－CESIDA－H－42。1.21∶1250mL500mL2mol/L40.0g500mL462373。1.3CaOH2、CaO、CaS、Ca3N2、Ca3P2、Ca2Si。584.3mg/LpH=11.860%PXS－215F－。22.1pH10mL150mL50mLpHF－F－1。1F－Table1ConcentrationofF－underdifferentalkalineconditions/mL/mLpHF－/mg/L1234567891010508.97499.169.57512.2210.14532.1010.85558.4711.20571.0011.96596.5512.26632.3112.79654.3613.10686.5013.52715.681F－Fig.1ConcentrationofF－underdifferentpHconditionsF－。pH。1pHF－F－。2.2100mL584.3mg/LpH=11.8pH8.5～13.550g100r/min25℃30min50minF－pH2。2pHFig.2TherelationshipbetweenfluorideremovalrateandpH2pHpH＞12.5。pHpH。2.310、20、30、40、50、60g100mLSHA－C25℃4h50minF－3。350g。58mg98%45g。3Fig.3Theeffectofcarbideslagamountonfluorideremovalrate2.44Fig.4Therelationshipbetweenfluorideremovalrateandstirringtime74201812。100mL50g100r/min25℃0.5、1、2、3、4、5h50minPXS－215F－4。43h3.5h98%。0.5h。2.5pH124h1hpHpH5。5Fig.5Theprocessofwastewatertreatment2Table2FluorideremovalresultofproductionwastewaterpH/h/mg·L－1/mg·L－1/%S112．16635．85．799．1S212．03492．29．898．0S311．914638．34．599．3S412．40606．54．999．2S512．10594．43．099．5298%10mg/L。3F－。。。1.CaO－NaClJ.200425216－19.2.J.2014831－33.3AmaralJCBSMoraisCA.ThoriumanduraniumextractionfromrareearthelementsinmonazitesulfuricacidliquorthroughsolventextractionJ.MineralsEngineering2010236498－503.4LiDYongZMengS.SeparationofthoriumⅣandextractingrareearthsfromsulfuricandphosphoricacidsolutionsbysolventextractionmethodJ.JournalofAlloys＆Compounds20043741431－433.5.J.20164129－135.6.－J.200553285－288.7YangCYDluhyＲ.ElectrochemicalgenerationofaluminumsorbentforfluorideadsorptionJ.JournalofHazardousMaterials2002943239.8FengSChenXPingGetal.ElectrochemicalremovaloffluorideionsfromindustrialwastewaterJ.JournalofDaqingPetroleumInstitute2005583987－993.9.D.2012.10.J.200122576－78.11.J.201411107－110.12.－J.2008241176－79.檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵檵56355%。1.Cu2+J.20093092586－2591.2.CuⅡCrⅥJ.20172712－719.3MuzzarelliＲAA.ChitinM.NewYorkPergamonpress1977134.4AlizadehBDelnavazMShakeriA.ＲemovalofCdⅡandphenolusingnovelcross－linkedmagneticEDTA/chitosan/TiO2nanocompositeJ.Carbohydratepolymers2018181675－683.5.J.2009302463－468.