High efficient Sr/S isolation for preparing Sr(OH)₂ from celestite (SrSO₄) in alkaline solution

Abstract

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 Na₂SO₄. The effects of initial concentration of NaOH, 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.

Keywords

celestite / Sr(OH)₂ / high efficient Sr/S isolation / dissolution-precipitation process

References

[1] DuszaM, StefanskiM, WozniakM, HreniakD, GerasymchukY, MarciniakL, GranekF, StrekW. Luminescent Sr₂CeO₄ nanocrystals for applications in organic solar cells with conjugated polymers [J]. Journal of Luminescence, 2016, 169: 857-861

[2] PlazaM, HuangX, Peter KoJ Y, ShenM, SimpsonB H, Rodríguez-LópezJ, RitzertN L, Letchworth-WeaverK, GuncelerD, SchlomD G, AriasT A, BrockJ D, AbruñaH D. Structure of the photo-catalytically active surface of SrTiO₃ [J]. Journal of the American Chemical Society, 2016, 138: 7816-7819

[3] WangW, JiaD C, ZhouY. Preparation and properties of SrBi_2.2Ta₂O₉ thin film [J]. Journal of Central South University, 2005, 12(4): 376-379

[4] ErdemogluM, CanbazogluM 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] ErdemogluM. carbothermic reduction of mechanically activated celestite [J]. International Journal of Mineral Processing, 2009, 92: 144-152

[6] YuanP, HanH L, DuanD 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

[7] SetoudehN, WelhamN J. Ball milling induced reduction of SrSO₄ by Al [J]. International Journal of Mineral Processing, 2011, 98(34): 214-218

[8] SetoudehN, WelhamN J. Mechanochemical reduction of SrSO₄ by Mg [J]. International Journal of Mineral Processing, 2012, 104–105: 49-52

[9] ErdemogluM, SarikayaM, CanbazogluM. Leaching of celestite with sodium sulfide [J]. Journal of Dispersion Science and Technology, 2006, 27: 439-442

[10] ZoragaM, KahrumanC, YusufogluI. 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] BingolD, AydoganS, GultekinS S. Neural model for the leaching of celestite in sodium carbonate solution [J]. Chemical Engineering Journal, 2010, 165: 617-624

[12] SetoudehN, WelhanN J, AzamiS M. Dry mechanochemical conversion of SrSO₄ to SrCO₃ [J]. Journal of Alloys and Compounds, 2010, 492: 389-391

[13] AydoganS, ErdemogluM, ArasA, UçarG, ÖzkanA. Dissolution kinetics of celestite (SrSO₄) in HCl solution with BaCl₂ [J]. Hydrometallurgy, 2006, 84: 239-246

[14] Suárez-OrdunaR, Rendón-AngelesJ C, Matamoros-VelozaZ, YanagisawaK. 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-AngelesJ C, Matamoros-VelozaZ, VelozaA M, Perez-GaribayR, RodriguezgaliciaJ, KazumichiY. Facile synthesis of perovskitestructured powders using barite–celestite ore under hydrothermal alkaline conditions [J]. Industrial & Engineering Chemistry Research, 2017, 56(36): 9942-9952

[16] ZoragaM, KahrumanC, YusufogluI. 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, ObutA, ZorkovskáA, BalážP, MatikM, BriancinJ. The effects of LiOH and NaOH on the carbonation of SrSO₄ by dry high-energy milling [J]. Minerals Engineering, 2013, 49: 98-102

[18] SahinM, ErdemM. Cleaning of high lead-bearing zinc leaching residue by recovery of lead with alkaline leaching [J]. Hydrometallurgy, 2015, 153: 170-178

[19] LiuY, ZhangY F, ChenF F, ZhangY. The alkaline leaching of molybdenite flotation tailings associated with galena [J]. Hydrometallurgy, 2012, 129–130: 30-34

[20] SongL M, LiY M, HeP Z, ZhangS J, WuX Q, FangS, ShanJ J, SunD L. Synthesis and sonocatalytic property of rod-shape Sr(OH)₂·8H₂O [J]. Ultrasonics Sonochemistry, 2014, 21: 1318-1324

[21] KadariA, MahiK, MostefaR, BadaouiM, MamecheA, KadriD. 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-ValdiviesoA, Robledo-CabreraA, Uribe-SalasA. Flotation of celestite with the anionic collector sodium dodecyl sulfate [J]. Int J Miner Process, 2000, 60: 79-90

[23] OwusuG, LitzJ E. Water leaching of SrS and precipitation of SrCO₃ using carbon dioxide as the precipitating agent [J]. Hydrometallurgy, 2000, 57: 23-29