Journal of the Korean Applied Science and Technology (한국응용과학기술학회지)

The Korean Society of Applied Science and Technology (한국응용과학기술학회)
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A Study on Making of High-Purity Ferro-manganese from $Mn_3O_4$ Waste Dust

$Mn_3O_4$ 분진으로부터 고순도 훼로망간 제조에 관한 연구

  • Kim, Youn-Che (Departments of Materials and Metallurgical Engineering and of Environmental Engineering, Kangwon National University) ;
  • Song, Young-Jun (Departments of Materials and Metallurgical Engineering and of Environmental Engineering, Kangwon National University) ;
  • Park, Young-Koo (Departments of Materials and Metallurgical Engineering and of Environmental Engineering, Kangwon National University)
  • 김윤채 (강원대학교 삼척캠퍼스 재료금속공학과, 환경공학과) ;
  • 송영준 (강원대학교 삼척캠퍼스 재료금속공학과, 환경공학과) ;
  • 박영구 (강원대학교 삼척캠퍼스 재료금속공학과, 환경공학과)
  • Received : 2011.03.24
  • Accepted : 2011.04.14
  • Published : 2011.06.30
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Abstract

In order to make high-purity ferro-manganese from $Mn_3O_4$ waste dust, the application of aluminothermite process to the reduction of the waste dust was investigated. The mixture from $Mn_3O_4$ dust as metallic source and Al metal powder as the reductant ignited, and reduced with an extremely intense exothermic reaction. The rapid propagation of the aluminothermite reaction occurred spontaneously and stably by ignition of the mixture. The Manganese having some alloy elements emerged as liquids due to the high temperatures reached up to about $2,500^{\circ}C$ and separated from the liquid by their differences of specific gravity. The result of thermite reaction showed the fact that can be obtained high purity ferro-manganese which have over about 90% of manganese content and lower impurities such as C, P, S than those of KS D3712 specification. The recovery of manganese from $Mn_3O_4$ dust was lower level of about 65% than about 75% from manganese ore by electric furnace process, that is due to spatter loss because of its extremely intense thermite reaction. But it will be improved by the process designed to provide CaO as the cooler or to use the Al metal powder having larger particle size distribution.

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References

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