석탄배합모형을 이용한 제철용 석탄의 경제성 분석

다국어 초록 (Multilingual Abstract)

Long-term economic strategy for purchasing the coking coal is inevitable for integrated steel mills. In this study, we analyze the economic effect of the coking coal as differing the percentage of each coal type and the acceptable quality level of blended coal. We formulated the mathematical coal blending model as MIP, and performed sensitivity analysis to estimate the change of total cost using the model.
The results show that increasing the percentage of the high fluidity hard coking coal leads to the rapid increase of total cost. As for the low fluidity hard coking coal or quasi-coking coal, increasing the percentage leads to little decrease of total cost. Increasing the percentage of semi-soft coking coal is estimated to be economically viable. Finally, lowering the acceptable quality level of blended coal has little impact on the total cost while raising the level incurs the rapid increase of total cost.
This result is expected to be used to determine the long-term economic feasibility of coking coal in steelworks. For the future research, the economic feasibility of purchasing should be analyzed in terms of not only purchasing cost but also the quality cost related to the final products along with the production cost throughout the steelworks.

목차 (Table of Contents)

• Abstract
• Ⅰ. 서론
• Ⅱ. 이론적 고찰
• Ⅲ. 석탄배합모형 및 경제성 분석
• Ⅳ. 결론 및 토의
• 참고문헌

참고문헌 (Reference)

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