Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Dissolution of North Korean Magnesite by using Hydrochloric Acid

  • Baek, Ui-Hyun (Strategic Minerals Utilization Research Department, Korea Institute of Geoscience and Mineral Resources) ;
  • Park, Hyungkyu (Strategic Minerals Utilization Research Department, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Jin-Young (Strategic Minerals Utilization Research Department, Korea Institute of Geoscience and Mineral Resources) ;
  • Kang, Jungshin (Strategic Minerals Utilization Research Department, Korea Institute of Geoscience and Mineral Resources)
  • Received : 2017.05.10
  • Accepted : 2017.06.07
  • Published : 2017.10.01
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Abstract

A fundamental study was conducted on the dissolution of North Korean magnesite using hydrochloric acid to understand the dissolution behavior of the magnesium and impurities. The influence of the acid concentration, particle size of the magnesite, reaction temperature, and pulp density on the dissolution of magnesium, iron, calcium, aluminum, and silicon dioxide was studied. The experimental results showed that 98.5% of magnesium, 86.9% of iron, 87.3% of calcium, 23.6% of aluminum, and 20.4% of silicon dioxide were dissolved when magnesite particle sizes within the range of $75{\sim}105{\mu}m$ were reacted using 3 M HCl solution under 6% pulp density at 363 K for 3 h. The residues that remained after the dissolution were silicon dioxide, talc, and clinochlore.

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References

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