Skip to main content
SpringerLink
Log in

The preparation of high purity MgO and precision separation mechanism of Mg and Ca from dolomite

  • Published:
Mining, Metallurgy & Exploration Aims and scope Submit manuscript

Abstract

High purity MgO is widely used in various fields as an important magnesium compound. The separation of Mg and Ca is of great importance for the preparation of high purity MgO from dolomite. In this study, the key effects of carbonization temperature and nano-calcium carbonate agglomeration on the separation mechanism of calcium and magnesium have been investigated. The results indicated that the reaction in the carbonization process was stepwise. Precise control of the carbonization temperature was essential for the formation of Mg(HCO3)2 due to its low reaction efficiency at lower temperatures or decomposition markedly at higher temperatures. Meanwhile, there was a common-ion effect in solutions containing Mg2+ and Ca2+. Nano-CaCO3 particles were formed during carbonization and agglomerated with the prolongation of static time. A product with a purity of 99.56% MgO and 0.16% CaO was obtained under the optimized conditions: ratio of liquid–solid 30 L/g, carbonization temperature 22–25 °C, carbonization time 1 h, and refining time 4 h. This work has important guiding significance for the preparation of high purity magnesium oxide from dolomite.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10
Fig. 11
Fig. 12
Fig. 13

Similar content being viewed by others

References

  1. Luo BJ et al (2014) Progress of high purity magnesium oxide preparation. Appl Mech Mater 525:62–65

    Google Scholar 

  2. Chen M et al (2017) Densification and grain growth behaviour of high-purity MgO ceramics by hot-pressing. Ceram Int 43(2):1775–1780

    Google Scholar 

  3. Liu Y et al (2012) Method for producing high-purity MgO with light-burned powder as raw material. Shenyang University of Chemical Technology, Peop. Rep. China, p 6

  4. Amer AM (1996) A contribution to hydrometallurgical processing of low-grade Egyptian dolomite deposits. Hydrometallurgy 42(3):345–356

    Google Scholar 

  5. Alamdari A et al (2008) Kinetics of magnesium hydroxide precipitation from sea bittern. Chem Eng Process 47(2):215–221

    Google Scholar 

  6. Kim MJ, Cho TY (2018) Method for recovering magnesium from seawater and a magnesium compound. Korea Maritime and Ocean University, S. Korea, p 23

  7. Nativ P, Birnhack L, Lahav O (2016) DiaNanofiltration-based method for inexpensive and selective separation of Mg2+ and Ca2+ ions from seawater, for improving the quality of soft and desalinated waters. Sep Purif Technol 166:83–91

  8. Tran KT et al (2013) Recovery of magnesium from Uyuni Salar brine as high purity magnesium oxalate. Hydrometallurgy 138:93–99

    Google Scholar 

  9. Dave RH, Ghosh PK (2005) Enrichment of bromine in sea-bittern with recovery of other marine chemicals. Ind Eng Chem Res 44(9):2903–2907

    Google Scholar 

  10. 柴多里,储志兵,杨保俊,张柠.工业硫酸镁制备高纯氧化镁的合成研究广州化工, 2009,37(03):80–83

  11. Wang J et al (2015) Thermodynamic and kinetic studies of the MgCl2-NH4Cl-NH3-H2O system for the production of high purity MgO from calcined low-grade magnesite. AICHE J 61(6):1933–1946

    Google Scholar 

  12. Virolainen S et al (2016) Removal of calcium and magnesium from lithium brine concentrate via continuous counter-current solvent extraction. Hydrometallurgy 162:9–15

    Google Scholar 

  13. Najmr S et al (1979) Chemical processing of magnesite to pure magnesia. Czech, p 4

  14. Li Z, Wang J (2012) Method for producing high-purity magnesia from low-grade Mg-containing ore. Institute of Process Engineering, Chinese Academy of Sciences, Peop. Rep. China, p 8

  15. Ding Y et al (2001) Nanoscale magnesium hydroxide and magnesium oxide powders: control over size, shape, and structure via hydrothermal synthesis. Chem Mater 13(2):435–440

    MathSciNet  Google Scholar 

  16. Sheila D, Sankaran C, Khangaonkar PR (1991) Studies on the extraction of magnesia from low grade magnesites by carbon dioxide pressure leaching of hydrated magnesia. Miner Eng 4(1):79–88

  17. Nduagu E et al (2012) Production of magnesium hydroxide from magnesium silicate for the purpose of CO2 mineralisation. Part 1. Application to Finnish serpentinite. Miner Eng 30:75–86

    Google Scholar 

  18. Fedoročková A, Raschman P (2008) Effects of pH and acid anions on the dissolution kinetics of MgO. Chem Eng J 143(1–3):265–272

    Google Scholar 

  19. Davis NE et al (2011) Grain growth kinetics of dolomite, magnesite and calcite: a comparative study. Phys Chem Miner 38(2):123–138

    Google Scholar 

  20. Yildirim M, Akarsu H (2011) Preparation of magnesium oxide (MgO) from dolomite by leach-precipitation-pyrohydrolysis process. Physicochem Problems Min Proces 44:257–272

    Google Scholar 

  21. Hipedinger NE, Tedesco PH (1988) Recovery of high-purity calcium and magnesium compounds from Argentine dolomites. Revista de Metalurgia (Madrid, Spain) 24(2):77–83

    Google Scholar 

  22. Akarsu H, Yildirim M (2008) Leaching rates of Icel-Yavca dolomite in hydrochloric acid solution. Miner Process Extr Metall Rev 29(1):42–56

    Google Scholar 

  23. Karidakis T, Agatzini-Leonardou S, Neou-Syngouna P (2005) Removal of magnesium from nickel laterite leach liquors by chemical precipitation using calcium hydroxide and the potential use of the precipitate as a filler material. Hydrometallurgy 76(1–2):105–114

  24. Vostrikova AV et al (2018) Thermal carbonization in nanoscale reactors: controlled formation of carbon nanodots inside porous CaCO3 microparticles. Sci Rep 8(1):1–7

    Google Scholar 

  25. Smith WR (1996) HSC Chemistry for Windows 2.0. J Chem Inf Model 36(1):151–152

    Google Scholar 

  26. Carmi I, Kronfeld J, Moinester M (2019) Sequestration of atmospheric carbon dioxide as inorganic carbon in the unsaturated zone under semi-arid forests. Catena 173:93–98

    Google Scholar 

  27. Shimpi N, Mali A, Hansora DP et al (2015) Synthesis and surface modification of calcium carbonate nanoparticles using ultrasound cavitation technique. Nanosci Nanoeng 3(1):8–12

    Google Scholar 

Download references

Acknowledgements

This research was supported by the National Natural Science Foundation of China (No. 21776320) and Hunan Provincial Natural Science Foundation of China (No. 2018JJ2489, No.2018JJ2484), the Hunan Provincial Science and Technology Plan Project (No. 2016TP1007).

Author information

Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, and Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha, 410083, Hunan, China

    Sihua Lei, Yu Gan, Zhanfang Cao, Shuai Wang & Hong Zhong

Authors
  1. Sihua Lei
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Yu Gan
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Zhanfang Cao
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Shuai Wang
    View author publications

    You can also search for this author in PubMed Google Scholar

  5. Hong Zhong
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding authors

Correspondence to Zhanfang Cao or Hong Zhong.

Additional information

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Sihua Lei and Yu Gan are co-first authors

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Lei, S., Gan, Y., Cao, Z. et al. The preparation of high purity MgO and precision separation mechanism of Mg and Ca from dolomite. Mining, Metallurgy & Exploration 37, 1221–1230 (2020). https://doi.org/10.1007/s42461-020-00213-w

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s42461-020-00213-w

Keywords

Search

Navigation