Quality Improvement of Low-Grade Calcium Carbonate Using Induced Roll Magnetic Separator

Authors

  • Pimpichcha Teawpanich Chulalongkorn University
  • Somsak Saisinchai Chulalongkorn University
  • Apisit Numprasanthai Chulalongkorn University
  • Raphael Bissen Chulalongkorn University
  • Onchanok Juntarasakul Chulalongkorn University
  • Carlito Baltazar Tabelin Mindanao State University - Iligan Institute of Technology
  • Theerayut Phengsaart Chulalongkorn University

DOI:

https://doi.org/10.4186/ej.2023.27.10.1

Keywords:

calcium carbonate, limestone, magnetic separation, iron content, ball mill

Abstract

Calcium carbonate (CaCO3) is an essential raw material in the manufacture of goods and industrial products like cement, rubber, paper, paints, food, and medicines. For this compound to be economically valuable, however, its quality needs to meet the standard market requirements. Among the various impurities found in natural CaCO3-bearing ores, iron (Fe) is one of the most problematic. In this study, the upgrading of low-grade CaCO3 from a processing plant in Thailand by magnetic separation was investigated. Detailed characterization of the low-grade material was also carried out to identify the solid-phase partitioning of Fe. The results showed that Fe was mainly associated with magnetite and pyrrhotite in the ore, and during processing, additional Fe was introduced from the ball milling process. To improve the quality of this low-grade CaCO3, the effects of magnetic field intensity, feed rate, and repetition on the induce roll magnetic separation were investigated. Based on the results, higher magnetic field intensity, lower feed rate, and more repetition are required for the upgrading of low-grade CaCO3.

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Author Biographies

Pimpichcha Teawpanich
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Department of Mining and Petroleum Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Somsak Saisinchai
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Department of Mining and Petroleum Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Apisit Numprasanthai
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Department of Mining and Petroleum Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Raphael Bissen
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Department of Mining and Petroleum Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Onchanok Juntarasakul
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Department of Mining and Petroleum Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

Carlito Baltazar Tabelin
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Department of Materials and Resources Engineering Technology, College of Engineering, Mindanao State University - Iligan Institute of Technology, Iligan City 9200, Philippines

Theerayut Phengsaart
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Department of Mining and Petroleum Engineering, Faculty of Engineering, Chulalongkorn University, Bangkok 10330, Thailand

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Published In
Vol 27 No 10, Oct 31, 2023
How to Cite
[1]
P. Teawpanich, “Quality Improvement of Low-Grade Calcium Carbonate Using Induced Roll Magnetic Separator”, Eng. J., vol. 27, no. 10, pp. 1-10, Oct. 2023.
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