鋰云母浸取鋰制備碳酸鋰的工藝研究.pdf

1、南昌大學(xué)碩士學(xué)位論文鋰云母浸取鋰制備碳酸鋰的工藝研究姓名：舒啟溢申請學(xué)位級別：碩士專業(yè)：化學(xué)工藝指導(dǎo)教師：邱祖民20120612ABSTRACTLi橢i唧isknownaS”energyelement”，whichiswidelyusedinchemicalindust隊(duì)electronicscienceandtechnology、metallurgy、medicine、aerospace、nuclearenergv、energyetc

2、duetoitsremarkablepropertiesandspecialfunctionsLithiumresourcesareabundantinChinawithgoodmarketprospects，whichcallbedevelopedandutilizedwidelyLepidoliteisoneofthemostimportantlitlll啪Inineralresources，domesticstorageisver

3、yconsiderable’andthereforewecaninvestigateitsextractiontechnologyusinglepidoliteasrawmaterialsFirsc，sulfatemetllodtreatmentoflithiummicahasbeenstudiedinthispaper，theexperimentmainlyprobedthemassfractionofsulfuricacid、cal

4、ciningtempera饑盯e、calciningtime、acidconsumptionratio、acidificationroastingtime’si11fluenceson廿1eleachingoflithiumduringthestudy，Atthesametimeorthogonalexpe曲地ntoptimizationhasbeenused，determiningthebesttechnologicalconditi

5、onofSulfateme戧10dlithiummica：950。Ctemperatureburningl—2h，concentratedsulphlJricacidacidificationroasting3h，acidminequantityratio20：1，boilingfor6h，whiIzhachieved95％rateoflithiumleachingSecondlv，slll缸icacidmethodtreatmento

6、flithiummicahasbeenstudied，itmainlvex鋤inest11emassfractionofsulfuricacid、acidconsumptionratiototheinfluenceoftheleachingratiooflithiumduringthestudy，both70％H2S04andincreasingacidaregoodfordissolvinglithiumfromlithiummica

7、Atthesametimetheorthogonalexperimentoptimizationhasbeenusedtodeterminethebesttechnologicalconditionofsulfatemethodleachinglithiummica：70％H2S04acidificaftonroasting3h，acidminequantityratio25：1，boilingfor4h，whichCanachieve

8、over94％rateoflithiumleachingFimdlypurifyingtechnologyoflithiummicaleachingsolutionhasbeens砌ied，finaloperatingprocessconditions：adjustPHofleachingsolutionvalueto78sequentially，AfterthesuctionFilteration，addsodiumhydroxide