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tons.Thetimerequiredforproducinglithiumcarbonateis 1.84dayspertononaverage. thereforehasadvantagesofgoodaceleration efectand highcrystalizationeficiency.Theacelerationprocesisa purelyphysicalproces,whichisenvironment-friendlyand gren.Mostoflithium carbonateobtainedbycrystalization US 9,932,241B2 mixturehavingathicknesofabout2mmhasbendepos- tons.Thetimerequiredforproducinglithiumcarbonateis itedonthebottomofthecrystalizer,andtheresidualbrine 1.63dayspertononaverage. isdischarged. Ascanbesenfromthedataoftheaboveembodiments, Thegradeofobtainedlithiumcarbonateinthemixtureis lithiumcarbonatecanbequicklyandefectivelyextracted 95.8%,andtheprecipitationrateofthelithiumsaltis99.6%. 5 from thesalinelakebrine.Thegradeoflithium carbonate Theoperationisruncontinuouslyforsevendaysfolow ing the above procedure. The grade of lithium carbonate obtainedfrom thesaltprecipitatedinthereduced-presure evaporationcrystalizeris95.8%andthemixtureisof3.80 obtainedbythemethodofthepresentinventionisespecialy high,evencanreach95%ormore,andthetotalrecoverycan reach99%. The device of the present invention can significantly ateis10promotemoistureevaporationandmakefuluseoftheheat, Embodiment3 1)Thebrineofsalt-spanofZhabuyesalinelakewhichhas 15 adhere to the fins and are easy to be collected.When the bendriedinthesunfor10days(theconcentrationof lithiumionis1.2g/L,andtheinitialtemperatureofthebrine is5oC.)iscooledto -20°C.by industrialfreezingsystem. Theinventionclaimedis: Afterprecipitationofsodiumchloride,potasiumchloride,20 1.Amethodforquicklyextractinglithiumcarbonatefrom andaphthitalite,asolid-liquidseparationiscariedoutto salinelakewater,themethodcomprising: obtainthelithium-richbrine; introducingalithium-richbrineinto areduced-presure 2)Theobtainedlithium-richbrineistransferedintothe evaporationcrystalizertooversaturateandprecipitate reduced-presureevaporationcrystalizersafterbeingpre heatedbythepreheatingapparatus,wherein eachcrystal-25 reduced-presureevaporationproces,whileleavinga residualliquid; 3)Thebrineisquicklyheatedto75oC.,evaporatedata dischargingtheresidualliquid; reduced-pressurefor5min,andthepressureofthecrystal colectingtheprecipitateinthecrystalizer;and lizerisbalancedat40kPa.After2hours,alithium-richsalt dryingtheprecipitatetoobtainlithiumcarbonatecrystals. mixturehavingathicknesofabout4mmhasbeendepos-30 2.Themethodaccordingtoclaim1,whereinduringthe itedonthebottomofthecrystalizer,andtheresidualbrine reduced-presureevaporationproces,thepresureofthe isdischarged. reduced-presure evaporation crystalizer ismaintained Thegradeofobtainedlithiumcarbonateinthemixtureis betwen25kPaand45kPa. 96.6%,andtheprecipitationrateofthelithiumsaltis9.0%. 3.Themethodacordingtoclaim1,whereinthetem Theoperation isruncontinuously forsevendaysfolowing 35perature for the reduced-pressure evaporation process theaboveprocedure. rangesfrom 60°C.to80°C. Thegradeoflithium carbonateobtained from thesalt 4.Themethodacordingtoclaim 1,whereinthelithium precipitatedinthereduced-pressureevaporationcrystalizer richbrineispreheatedbeforebeingintroducedintothe is96.6%andthemixtureisof4.01tons.Thetimerequired reduced-presureevaporationcrystalizer. forproducinglithiumcarbonateis1.75dayspertonon40 5.Themethodaccordingtoclaim1,whereinthelithium average. richbrineispreparedbyaprocescomprising: cooling saline lake water to a temperature ranging from Embodiment4 -40°C.to-20°C.toprecipitatesodium andpotasium saltspresentinthewater;and 1)Thebrineofsalt-spanofZhabuyesalinelakewhichhas45 separatingtheprecipitatedsodiumandpotasiumsalts been dried in the sun for 60 days (the concentration of from thewater to obtain the lithium -rich brine. lithiumionis2.1g/L,andtheinitialtemperatureofthebrine 6.Themethodacordingtoclaim1,whereinthesystem is12°C.)iscoledto-20°C.byindustrialfrezingsystem forimplementingthemethodcomprises: Afterprecipitationofsodiumchloride,potasium chloride, areduced-presureevaporationcrystalizer; andaphthitalite,asolid-liquidseparationiscariedoutto50 avacuum-pumpingapparatus; obtain the lithium -rich brine; a brine preheating apparatus; and 2)Theobtainedlithium-richbrineistransferedintothe abrinecolingaparatus, reduced-pressureevaporationcrystalizersafterbeingpre- wherein the reduced-presure evaporation crystalizer heatedbythepreheatingaparatus,whereineachcrystal comprisesanouterwal,aninercontainerandan lizer contains 30 L brine; upper cover, 3)Thebrineisquicklyheatedto80°C.,evaporatedata aheaterequipedbetweentheouterwallandtheiner lizercontains30Lbrine; reduced-pressurefor5min,andthepresureofthecrystal lizerisbalancedat45kPa.After2hours,alithium-richsalt whereintheupercovercomprisesatopandabotom, mixturehavingathicknesofabout5mm hasbendepos itedonthebottomofthecrystalizer,thentheresidualbrine60 isdischarged. Thegradeofobtainedlithiumcarbonateinthemixtureis 97.3%,andtheprecipitationrateofthelithium saltis9.8%. Theoperationisruncontinuouslyforsevendaysfolow ingtheaboveprocedure.Thegradeoflithiumcarbonate65 withthebrinepreheatingaparatusviapipes,and obtainedfrom thesaltprecipitatedinthereduced-presure whereinthebrinepreheatingaparatusisconectedwith evaporationcrystalizeris97.3%andthemixtureisof4.28 thebrinecolingapparatusviapipes. crystalizationprocessoflithium carbonateisaccelerated, thefreshwatercanalsobeproduced,whichisparticularly suitableforremotesalinelakeminingarea. outlithium carbonate from thelithium-richbrineby a container, whereinthetopoftheuppercoverisequippedwitha steamoutletandabrineinletandthebottom ofthe uppercoverisequipedwithseveraldetachablefins, whereinthesteam outletisconnectedwiththevacuum pumpingaparatusviapipes, wherein thevacuum-pumping apparatusisconnectedPDF Image | Patent EXTRACTING LITHIUM CARBONATE FROM SALINE LAKE WATER
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Product and Development Focus for Infinity Turbine
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