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Survey on the Recycling of Waste Slag Generated by Smelting Reduction of Deep-Sea Manganese Nodules

망간단괴 용융환원 폐슬래그의 재활용 방안

  • Park, Hyungkyu (Korea Institute of Geoscience and Mineral Resources) ;
  • Nam, Chulwoo (Korea Institute of Geoscience and Mineral Resources) ;
  • Kim, Sungdon (Korea Institute of Geoscience and Mineral Resources)
  • Received : 2014.06.17
  • Accepted : 2014.07.24
  • Published : 2014.08.30

Abstract

Slags generated in the smelting reduction of deep sea manganese nodule could be utilized as an additional materials for making Fe-Si-Mn alloys by mixing with cokes and re-smelting at an arc furnace. In this re-melting process slag is also generated, and the secondary slag is treated as waste. In this survey, recycling of the waste slag of Mn nodule was studied. It is tried to utilize the waste slag as ceramic materials or construction materials. However, it is difficult to use the waste slag directly as an additional material to ceramics such as portland cement or castable refractory material due to the much difference of chemical compositions. As an altercation road constructing material is considered, and toxicity on the soil of the waste slag was tested according to Korean Standard for testing permissible amount of toxic substances. The test result was satisfied with the requirements on the standard. So, it should be suggested that the waste slag of the Mn nodule could be utilized as constructing materials such as road filler or base materials.

심해저 망간단괴를 용융환원 제련시 발생된 슬래그에 규사와 cokes를 일정량 배합하여 아크로에서 재용융하여 Fe-Si-Mn 합금철을 제조하는 과정에서 발생하는 2차 슬래그는 아직 특정 용도가 개발되지 않은 폐슬래그로 취급되는데, 이 폐슬래그의 재활용 방안에 대하여 요업 원료로의 활용가능성과 건설재료로의 활용가능성을 검토하였다. 망간단괴 폐슬래그를 포틀랜드시멘트, 캐스타블내화물과 같은 요업원료로 사용하는 것은 조성 차이가 많아서 직접적인 활용이 곤란하고, 다른 활용방법으로서 폐슬래그를 도로 노반재나 성토재 및 복토재 등과 같은 건설재료로 활용하는 것이 무난하다고 판단된다. 도로 건설재료로 사용시 혹시 있을지도 모를 토양 오염에 대비하여 유해물질들에 대한 용출시험을 KS 기준에 따라 수행한 결과 폐슬래그의 무해성을 확인할 수 있었다. 따라서, 망간단괴 폐슬래그를 도로 성토재나 노반재와 같은 건설재료로 활용하는 방안을 제안코자 한다.

Keywords

References

  1. Chulwoo Nam et al., 2014 : "2013 Development of Smelting Technology for Deep-Sea Mineral Resources", R&D Report, Korea Institute of Geoscience and Mineral Resources
  2. Kyung-Ho Park et al., 2005 : "Treatment of Metal Wastes with Manganese Nodules", Journal of the Korean Institute of Resources Recycling, 14(4), pp.17-21
  3. Sverre E. Olsen, Merete Tangstad and Tor Lindstad, 2007 : "Production of Manganese Ferroalloy", SINTEF and Tapir Academic Press, Trondheim, Norway, p.189
  4. P. Kumar Mehta and P. J. M. Monteiro, 1993 : "Concrete", 2nd. Ed., Prentice-Hall Inc. New York, pp.180-185
  5. Korean Standard, 2014, KS ES-06002
  6. The Monthly Magazine for Ceramics, "News in Brief", 2007, June, p.143
  7. Jeongwon Lee, 2014 : "Test Report No. TAD-002579", Korea Testing & Research Institute