Research status on thermodynamics and kinetics of carbon and hydrogen reduction of molten iron oxides
The application of hydrogen energy in metallurgy is one of the significant ways to achieve low-carbon development.At present,although many achievements have been made in the field of hydrogen-rich blast furnace and hydrogen assisted direct reduction of iron oxides,there are still many shortcomings in carbon and hydrogen molten reduction ironmaking.By analyzing the reduction of molten iron oxides by carbon,CO and hydrogen,the basic thermodynamic characteristics of the smelting reduction process were summarized,and the factors affecting the kinetic parameters were analyzed.The results indicate that the reduction of FeO by hydrogen above the melting temperature(1 369 ℃)has advantageous in thermodynamics.And when the reduction temperature of the reduction reaction is raised above 1 538 ℃(both the reduced material and the reduced product are in the molten state),the reduction gas flow rate is 3 mL/min,and the alkalinity is 1.1-1.3,it is conducive to the melting reaction.The research on the reduction of molten iron oxides by carbons and hydrogen is not yet sufficient,and further analysis of the reduction process,limiting links and microscopic mechanisms is needed.
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