Mechanochemical conversion of domestic celestite mineral to SrC2O4 in the ammonium oxalate media

Yıl 2019, , 840 - 847, 01.10.2019

Mert Zorağa

https://doi.org/10.16984/saufenbilder.535643

Cited By: 1

Öz

The main
raw material used in the production of Sr metal and its compounds is SrSO₄
(celestite) mineral and Turkey has valuable Sr mineral deposits. One of the
important steps in the production of Sr compounds is the production of
strontium oxalate compound that does not contain alkali compunds as
contamination. Strontium is used as a primary raw material in the production of
oxalate, superconducting material and luminescence.

In this
study, the in situ conversion of SrSO₄ into SrC₂O₄.H₂O
by ammonium oxalate is investigated and the effect of rotation speed, ball /
sample ratio and solution concentration on the conversion reaction has been
determined. It was found that the conversion of SrO₄ to SrC₂O₄.H₂O
was increased with the increase in mole ratio of (NH₄)₂C₂O₄
to SrSO₄. The maximum conversion, above 70 %, was achieved by using
(NH₄)₂C₂O₄ / SrSO₄ mole
ratio: 1.5, rotation speed: 500 rpm and ball / sample ratio: 13.

Anahtar Kelimeler

Celestite, strontium oxalate

Kaynakça

• MTA. (2010).Sivas ili maden ve enerji kaynakları. Retrieved 17 September 2018 fromhttp://www.mta.gov.tr/v3.0/sayfalar/bilgimerkezi/maden_potansiyel_2010/sivas_madenler.pdf.
• M. Iwai and J.M. Toguri, “The leaching of celestite in sodium carbonate solution,” Hydrometallurgy, vol. 22, no. 1–2, pp. 87–100, 1989.
• A.H. Castillejos, B. De La Cruz Del and S. Uribe, “The direct conversion of celestite to strontium carbonate in sodium carbonate aqueous media,” Hydrometallurgy, vol. 40, no. 1–2, pp. 207–222, 1996.
• E. Knaepen, J. Mullens, J. Yperman and L.C. Van Poucke, “Preparation and thermal decomposition of various forms of strontium oxalate1”. Thermochim. Acta, vol. 284, no. 1, pp. 213–227, 1996.
• A.N. Chritensen and R.G. Hazell, “Thermal analysis and crystal structure of tetragonal strontium oxalate dehydrate and of triclinic strontium oxalate hydrate,” Acta Chem. Scandin., vol. 52, pp. 508–512, 1998.
• D. Dollimore, “The thermal analysis of strontium oxalate,” Thermochimica Acta, vol. 92, no. 15, pp. 543–546, 1985.
• A.K. Kobe and N.J. Deiglmeier, “Conversion from strontium sulfate by metathesis with alkali carbonate solution,” Ind. and Eng. Chem., vol. 35, no. 3, pp. 323–325, 1943.
• A. Obut, P. Balaz and I. Girgin I, “Direct mechanochemical conversion of celestite to SrCO3,” Miner. Eng., vol. 19, no. 11, pp. 1185–1190, 2006.
• M. Erdemoglu, S. Aydogan and M. Canbazoglu, “A kinetic study on the conversion of celestite (SrSO4) to SrCO3 by mechanochemical processing, Hydrometallurgy, vol. 86, no. 1–2, pp.1–5, 2007.
• N. Setoudeh, N.J. Welham and S.M. Azami, “Dry mechanochemical conversion of SrSO4 to SrCO3,”. J. Alloys Compd., vol. 492, no. 1–2, pp. 389–391, 2010.
• D. Bingol, S. Aydogan and S.K. Bozbaş, “Optimization of the wet mechanochemical process conditions of SrSO4 to SrCO3 and (NH4)2SO4 by using response surface methodology,” Metall. Trans. B, vol. 43B, pp. 1214–1219, 2012.
• D. Bingol, S. Aydogan and S.K. Bozbaş, “Production of SrCO3 and (NH4)2SO4 by dry mechanochemical processing of celestite,” J. Ind. Eng. Chem., vol. 18, no. 2, pp. 834–838, 2012.
• Q. Zhang and F. Saito, “Mechanochemical processing of celestine,” Chem. Eng. J., vol. 66, no: 1, pp. 79–82, 1997.
• N. Steoudeh and N.J. Welham, “Ball milling induced reduction of SrSO4 by Al,” Int. J. Miner. Process., vol. 98, no: 3–4, pp. 214–218, 2011.
• N. Steoudeh and N.J. Welham, “Ball milling induced reduction of SrSO4 by Mg,” Int. J. Miner. Process., vol. 104, pp. 49–52, 2012.
• A.S. Selim and M. Abd-El-Khalik, “Thermal decomposition of strontium oxalate-effect of various atmospheres,” Powder Technol., vol. 20, no: 1, pp. 53–59, 1978.
• D. J. Price, A.K. Powell and P.T. Wood, Hydrothermal crystallisation and X-ray structure of anhydrous strontium oxalate., Polyhedron, vol. 18, no: 19, pp. 2499–2503, 1999.
• E. D. Bacce, A.M. Pires, M.R. Davalos and M. Jacelicci Jr, “Thermal decomposition and rehydration of strontium oxalate: morphological evolution,” Int. J. Inorg. Mater., vol. 3, no: 6, pp. 443–452, 2001.
• D. Zhang, L. Qi, J. Ma and H. Cheng, “Biomimetic growth of strontium oxalate aggregates with unusual morphologies in the presence of poly(methacrylic acid),” Cryst. Eng. Comm., vol. 4, no: 88, pp. 536-538, 2002.
• J. Yu, H. Tang and B. Cheng, “Morphological control of strontium oxalate particles by PSMA-mediated precipitation reaction,” Mater. Chem. Phys., vol. 9, no: 1, pp. 134–139, 2005.
• A. Obut, “Interaction of celestine concentrate and reagent grade SrSO4 with oxalate solution,” Acta Montan. Slovaca, vol. 17, no: 2, pp. 126–131, 2012.
• J. Torres, J. Mendez and M. Sukiennik, “Transformation enthalpy of alkali-earth sulfates (SrSO4, CaSO4, MgSO4, BaSO4),” Thermochim. Acta, vol. 334, no: 1–2, pp. 57–66, 1999.