Gemini有機(jī)硅捕收劑的合成及其對(duì)鋁硅酸鹽礦物的浮選性能研究.pdf

1、中南大學(xué)碩士學(xué)位論文Gemini有機(jī)硅捕收劑的合成及其對(duì)鋁硅酸鹽礦物的浮選性能研究姓名：黃志強(qiáng)申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：化學(xué)工藝指導(dǎo)教師：鐘宏20100524碩十學(xué)位論文ABSTRACTABSTRACTGeminiorganosiliconsurfactants，F(xiàn)GS2，F(xiàn)GS4andFGS一6weresynthesizedbysilaneSCA1902hexamethyldisiloxaneMManddibromoalkanethro

2、ughSIN2reactionInfraredspectra，GC—MSandNMRanalysiswerestudiedtoillustratethestructureoftheproductsandtheresultswereagreedwellwiththeexpectedones；HPLCanalysisshowedthatthepurityofthethreeproductswere8577％8792％and9226％resp

3、ectivelyTheflotationbehaviorsofthemainganguemineralsinbauxiteores—kaolinite，pyrophylliteandillitewithaseriesofGeminiorganosiliconcollectorswerestudiedThepuremineralflotationexperimentsshowthatallofthethreeGeminiorganosil

4、iconecationiccollectorsFGS一2FGS4andFGS6exhibitstrongflotationcapabilityonkaolinite，pyrophylliteandilliteoverawidepHrange，andtherecoveryofthethreealuminosilicatemineralsishigherinalkalineconditionthaninacidconditionespeci

5、allyinstrongalkalineconditionpH=12ThecollectingcapabilityofthethreecollectorsisintheorderofFGS6FGS4FGS2UsingGeminiorganosiliconsurfactantsascollectors，withtheconcentrationof61O_斗mol／LandpH=95theflotationrecoveriesoftheth

6、reealuminosilicatemineralsareallupto90％TheadsorptionmechanismofthenewcollectorsonthethreealuminosilicatemineralshasbeeninvestigatedthroughZetapotentialandIRspectrummeasurementsZetapotentialmeasurementindicatesthatthePZC(

7、PointofZeroCharge)ofkaolinite，pyrophylliteandilliteare35，23and30respectivelyandthetpotentialofkaolinite，pyrophylliteandilliteshowsapronouncedshifttowardsmorepositivezetapotentialsinthepresenceofthecollectorTheIRspectrumo

8、fclaymineralstreatedbyFGS4bothexhibitnewpeaksaroundat30002800cm～，whichpreviouslyattributestothestretchingbandsof—CH3andCH2，andnootherpeakshiftwasobservedSoitcanbeconcludedthattheadsorptionbetweenGeminiorganosiliconcollec