天青石(SrSO_4)碱性溶液转化Sr(OH)_2过程中的Sr/S元素高效分离（英文）
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摘要
天青石制备其他锶化合物的瓶颈在于如何实现Sr/S元素的高效分离。本文针对天青石转化Sr(OH)_2过程中的Sr/S元素高效分离进行研究,开发出一种低能耗及零污染的Sr/S元素分离新方法,其中Sr元素以Sr(OH)_2形式存在于固相中,S元素则以Na_2SO_4形式进入液相中。通过对反应过程中的因素,如初始NaOH浓度、转化温度、液固比和转化时间对Sr/S元素分离效率的影响进行的研究,结果发现Sr/S元素的分离效率随着初始Na OH浓度、液固比和反应时间的增大而增加,而随着反应温度的升高而降低。在所得最优转化条件下,Sr(OH)_2的最大转化率可达93.88%,该样品中的Sr/S比可达到41.16。这证实了在碱性溶液中天青石转化成Sr(OH)_2过程可以较好地实现Sr/S的高效分离。样品的SEM-EDS测试结果表明其转化过程为溶解-沉积过程。
The bottleneck of strontium compounds preparing from celestite is the promotion of Sr/S isolation efficiency. Low energy consumption and zero release method for isolating Sr/S in preparing Sr(OH)_2 process from celestite in mild condition was described. Sr element remained in precipitation with formation of Sr(OH)_2, while S element entered into leachate with formation of Na_2SO_4. The effects of initial concentration of Na OH, conversion temperature, liquid-to-solid(L/S) ratio and conversion time on Sr/S ratio of samples for celestite conversion were systematically investigated by experiments. The results demonstrated that the efficiency of Sr/S isolation increased with the initial concentration of NaOH, L/S ratio and conversion time, and decreased with conversion temperature. The maximum conversion ratio of Sr(OH)_2 was 93.88% under the optimum condition, whose Sr/S ratio of sample could reach to 41.16. It illustrated that better isolation efficiency of celestite could be achieved in alkaline treatment. The results of SEM-EDS analyses demonstrated that the conversion reaction was a dissolution-precipitation process.
The bottleneck of strontium compounds preparing from celestite is the promotion of Sr/S isolation efficiency. Low energy consumption and zero release method for isolating Sr/S in preparing Sr(OH)_2 process from celestite in mild condition was described. Sr element remained in precipitation with formation of Sr(OH)_2, while S element entered into leachate with formation of Na_2SO_4. The effects of initial concentration of Na OH, conversion temperature, liquid-to-solid(L/S) ratio and conversion time on Sr/S ratio of samples for celestite conversion were systematically investigated by experiments. The results demonstrated that the efficiency of Sr/S isolation increased with the initial concentration of NaOH, L/S ratio and conversion time, and decreased with conversion temperature. The maximum conversion ratio of Sr(OH)_2 was 93.88% under the optimum condition, whose Sr/S ratio of sample could reach to 41.16. It illustrated that better isolation efficiency of celestite could be achieved in alkaline treatment. The results of SEM-EDS analyses demonstrated that the conversion reaction was a dissolution-precipitation process.
引文
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[17]TURIANICOVáE,OBUT A,ZORKOVSKáA,BALá?P,MATIK M,BRIAN?IN J.The effects of LiOH and NaOHon the carbonation of SrSO4 by dry high-energy milling[J].Minerals Engineering,2013,49:98-102.
[18]?AHIN M,ERDEM M.Cleaning of high lead-bearing zinc leaching residue by recovery of lead with alkaline leaching[J].Hydrometallurgy,2015,153:170-178.
[19]LIU Y,ZHANG Y F,CHEN F F,ZHANG Y.The alkaline leaching of molybdenite flotation tailings associated with galena[J].Hydrometallurgy,2012,129-130:30-34.
[20]SONG L M,LI Y M,HE P Z,ZHANG S J,WU X Q,FANGS,SHAN J J,SUN D L.Synthesis and sonocatalytic property of rod-shape Sr(OH)2·8H2O[J].Ultrasonics Sonochemistry,2014,21:1318-1324.
[21]KADARI A,MAHI K,MOSTEFA R,BADAOUI M,MAMECHE A,KADRI D.Optical and structural properties of Mn doped CaSO4 powders synthesized by sol-gel process[J].Journal of Alloys and Compounds,2016,688:32-36.
[22]LOPEZ-VALDIVIESO A,ROBLEDO-CABRERA A,URIBE-SALAS A.Flotation of celestite with the anionic collector sodium dodecyl sulfate[J].Int J Miner Process,2000,60:79-90.
[23]OWUSU G,LITZ J E.Water leaching of SrS and precipitation of SrCO3 using carbon dioxide as the precipitating agent[J].Hydrometallurgy,2000,57:23-29.
[2]PLAZA M,HUANG X,PETER KO J Y,SHEN M,SIMPSON B H,RODRíGUEZ-LóPEZ J,RITZERT N L,LETCHWORTH-WEAVER K,GUNCELER D,SCHLOMD G,ARIAS T A,BROCK J D,ABRU?A H D.Structure of the photo-catalytically active surface of SrTiO3[J].Journal of the American Chemical Society,2016,138:7816-7819.
[3]WANG W,JIA D C,ZHOU Y.Preparation and properties of SrBi2.2Ta2O9 thin film[J].Journal of Central South University,2005,12(4):376-379.
[4]ERDEMO?LU M,CANBAZO?LU M H Y.Carbothermic reduction of high-grade celestite ore to manufacture strontium carbonate[J].Mineral Processing and Extractive Metallurgy IMM Transactions Section C,1998,107:65-70.
[5]ERDEMO?LU M.carbothermic reduction of mechanically activated celestite[J].International Journal of Mineral Processing,2009,92:144-152.
[6]YUAN P,HAN H L,DUAN D P.Experimental research on different reductants applied in RHF direct reduction process[J].Journal of Hebei United University(Natural Science Edition),2015,37(1):52-58.(in Chinese)
[7]SETOUDEH N,WELHAM N J.Ball milling induced reduction of SrSO4 by Al[J].International Journal of Mineral Processing,2011,98(3,4):214-218.
[8]SETOUDEH N,WELHAM N J.Mechanochemical reduction of SrSO4 by Mg[J].International Journal of Mineral Processing,2012,104-105:49-52.
[9]ERDEMO?LU M,SARIKAYA M,CANBAZO?LU M.Leaching of celestite with sodium sulfide[J].Journal of Dispersion Science and Technology,2006,27:439-442.
[10]ZORAGA M,KAHRUMAN C,YUSUFOGLU I.Conversion kinetics of SrSO4 to SrCO3 in solution obtained by dissolving/hydrolyzing of equimolar amounts of NH4HCO3 and NH4COONH2[J].Hydrometallurgy,2016,163:120-129.
[11]BINGOL D,AYDOGAN S,GULTEKIN S S.Neural model for the leaching of celestite in sodium carbonate solution[J].Chemical Engineering Journal,2010,165:617-624.
[12]SETOUDEH N,WELHAN N J,AZAMI S M.Dry mechanochemical conversion of SrSO4 to SrCO3[J].Journal of Alloys and Compounds,2010,492:389-391.
[13]AYDO?AN S,ERDEMO?LU M,ARAS A,U?AR G,?ZKAN A.Dissolution kinetics of celestite(SrSO4)in HCl solution with BaCl2[J].Hydrometallurgy,2006,84:239-246.
[14]SUáREZ-ORDUNA R,RENDóN-ANGELES J C,MATAMOROS-VELOZA Z,YANAGISAWA K.Exchange of SO42-ions with F-ions in mineral celestite under hydrothermal conditions[J].Solid State Ionics,2004,172(1-4):393-396.
[15]RENDóN-ANGELES J C,MATAMOROS-VELOZA Z,VELOZA A M,PEREZ-GARIBAY R,RODRIGUEZ-GALICIA J,KAZUMICHI Y.Facile synthesis of perovskitestructured powders using barite-celestite ore under hydrothermal alkaline conditions[J].Industrial&Engineering Chemistry Research,2017,56(36):9942-9952.
[16]ZORAGA M,KAHRUMAN C,YUSUFOGLU I.Determination of conversion reaction mechanism of celestite to acidic strontium oxalate hydrate in aqueous solution of H2C2O4[J].Hydrometallurgy,2017,171:53-60.
[17]TURIANICOVáE,OBUT A,ZORKOVSKáA,BALá?P,MATIK M,BRIAN?IN J.The effects of LiOH and NaOHon the carbonation of SrSO4 by dry high-energy milling[J].Minerals Engineering,2013,49:98-102.
[18]?AHIN M,ERDEM M.Cleaning of high lead-bearing zinc leaching residue by recovery of lead with alkaline leaching[J].Hydrometallurgy,2015,153:170-178.
[19]LIU Y,ZHANG Y F,CHEN F F,ZHANG Y.The alkaline leaching of molybdenite flotation tailings associated with galena[J].Hydrometallurgy,2012,129-130:30-34.
[20]SONG L M,LI Y M,HE P Z,ZHANG S J,WU X Q,FANGS,SHAN J J,SUN D L.Synthesis and sonocatalytic property of rod-shape Sr(OH)2·8H2O[J].Ultrasonics Sonochemistry,2014,21:1318-1324.
[21]KADARI A,MAHI K,MOSTEFA R,BADAOUI M,MAMECHE A,KADRI D.Optical and structural properties of Mn doped CaSO4 powders synthesized by sol-gel process[J].Journal of Alloys and Compounds,2016,688:32-36.
[22]LOPEZ-VALDIVIESO A,ROBLEDO-CABRERA A,URIBE-SALAS A.Flotation of celestite with the anionic collector sodium dodecyl sulfate[J].Int J Miner Process,2000,60:79-90.
[23]OWUSU G,LITZ J E.Water leaching of SrS and precipitation of SrCO3 using carbon dioxide as the precipitating agent[J].Hydrometallurgy,2000,57:23-29.
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