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A Study on the Evaluation of Mechanical Characteristics of Iron Ores

철광석의 역학적 특성 평가에 관한 연구

  • Received : 2014.02.24
  • Accepted : 2014.07.30
  • Published : 2014.08.30

Abstract

The objective of this study is to investigate the possibility of beneficiation of low grade iron ore. Iron ore A might be upgraded by the mineral liberation effect, while iron ore B was expected to be difficult to upgrade. However, the Fe contents of iron ore B were increased from 68% to 81% by the heat treatment process. Iron ore A was found to possibly enrich the Fe components through the physical separation process, such as magnetic separation, floatation and gravity concentration. In the case of iron ore B, it was possible to concentrate the Fe components through the heat treatment process.

본 연구에서는 자원고갈에 따른 철광석의 자원화 가능성에 대한 연구를 수행하였다. 이를 위하여 Fe함량이 각각 64%(A광석)와 57%(B광석)인 Fe품위를 갖는 2종의 철광석 시료를 대상으로, 광석의 파쇄거동 특성 및 조직학적 측면에서 비교분석을 통하여 광종별 품위향상 가능성을 알아보고자 하였다. SEM 분석결과, 철광석 A의 경우 철산화물과 맥석이 분리된 형태로 분포되어 있으며, B광석의 경우는 철산화물과 맥석이 혼재되어 분포되어 있었다. 이는 B광석에 비해 A광석이 분쇄에 의한 단체분리가 보다 용이함을 의미한다. 따라서 A광석은 적절한 입도로 분쇄 후 자력선별 등에 의한 품위 향상이 가능할 것으로 판단된다. 반면 B광석은 단체분리를 위하여 A광석보다 미립으로 분쇄하여야 할 것으로 판단되나, 열처리 전 62 ~ 68% Fe조성이 열처리 후 약 81%로 증가하는 경향을 보여, 열처리를 적용한 품위 향상이 가능할 것으로 사료된다.

Keywords

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