| Title |
Kinetic Study on Smelting Reduction of Iron Ore in Slag |
| Authors |
정원섭(W . S . Chung) ; 김용하(Y . H . Kim) ; 주상훈(S . H . Joo) ; 민동준(D . J . Min) ; 박대규(D . G . Park) ; 이일옥(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. |