발간논문

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Vol.30, No.12, 1528 ~ 1535, 1992
Title
Kinetic Study on Smelting Reduction of Iron Ore in Slag
정원섭 , 김용하 , 주상훈 , 민동준 , 박대규 , 이일옥 W . S . Chung , Y . H . Kim , S . H . Joo , D . J . Min , D . G . Park , I . O . Lee
Abstract
In order to analyse iron ore reduction rate and heat balance for the in-bath type smelting reduction processing operations, a series of experiments was carried out using a bench scale smelting reduction furnace of 500㎏ in capacity. Total iron concentration in slag (%T.Fe) reached to the steady state at about 30 minutes after the start of continuous iron ore feeding into the smelter. (%T.Fe) in slag at the steady state increased with the increase of iron ore feeding rate. In the present study, maximum post combustion ratio was observed to be approximately 60 %, and it changed with respect to the oxygen injection point. When the oxygen lance was submerged into slag, heat transfer efficiency was improved. Above 80% of heat transfer effieiency was obtained with 60% of post combustion ratio. The iron productivity of smelting reduction process was calculated to be about 7 ton-Fe/day/㎥ based on the present experimental results, this being approximately three times of the capacity compared to the blast furnace at same inner volume.
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