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Abstract
As part of ongoing effort to develop a novel flash ironmaking process using reduction of iron ore concentrate by natural gas or hydrogen, equilibrium phosphorus distribution between MgO saturated slag and iron was determined in the temperature range of 1550–1650°C under three different gas atmospheres: H2/H2O, H2/H2O/CO/CO2 and CO/CO2. The distribution ratios of phosphorus LP were 8, 17 and 20 respectively under these atmospheres. In the flash process, over ∼25 wt-%P volatilises during ore concentrate downward flight in the reactor shaft in addition to avoiding the use of coke. Therefore, it is expected that the proposed method would produce iron with less phosphorus content than that of the blast furnace.