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중질유의 고정탄소에 의한 산화철의 직접환원
Direct Reduction of Iron Oxides with Fixed Carbon from Heavy Oils
HWAHAK KONGHAK, February 1988, 26(1), 1-6(6), NONE
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Abstract
산화철과 중질유를 혼합하고 가열하므로써 중질유중의 휘발분을 분리하고 남아있는 고정탄소로써 산화철을 환원하여 금속철과 탄소혼합물을 만들었다. 전체 환원반응속도는 비슷한 조건에서 진행되는 산화철과 순수한 일산화탄소와의 반응속도보다 빨랐다. 이 반응은 일반적인 산화철과 탄소분말을 혼합하고 가열할 때 일어나는 기상의 매개체에 의하여 진행되는 고체간의 반응이라기 보다는 미세한 산화철의 표면에 밀착된 탄소에 의한 직접환원이 주된 반응으로 이산화탄소와 일산화탄소가 동시에 발생한 것으로 생각된다. 이 결과는 효과적인 제철과 동시에 중질유의 분해로 발생하는 경질유를 분리 회수하므로써 대폭적인 제철비용을 절감할 수 있을 것이다.
Mixture of metallic iron and carbon was made by heating the mixture of iron oxides and fixed carbon separated from heavy oils. Overall reaction rate was faster than that of iron oxides with pure carbon monoxide under similar conditions. It seemed that the direct reduction of iron oxides with carbon layer surrounding throughly all over the surfaces of iron oxide particles took place dominantly evolving carbon dioxde and carbon monoxide simultaneously instead of the reaction between solids through gaseous imtermediates for conventional system of iron oxides and solid carbon. This result could be applied to making iron more effectively than ever and reducing the cost of ironmaking considerably by utilization of light fraction of heavy oil as by-product.