Reduction of Fe_1‐xO in liquid state by H₂₊Ar mixtures

Abstract

The investigations of reducing Fe1‐xO in liquid state with H2+Ar mixtures, in top blowing stream of gas reactor, by using thermobalance method have been carried out. To make the system more homogeneous pure iron crucibles were used in the experiment. The experiments were carried out in the range of gas flow rate V = (5+80) · 10−6 m3/s and in 1723 K. Reduction rate depends on hydrogen partial pressure and flow rate of gas mixture. The logarithm of apparent reduction rate constant is a linear function of logarithm of gas flow rate. In experimental conditions of this work, the initial rate of reduction satisfies the relation . Thus it has been shown that the reduction process is controlled by the mass transfer in the gaseous phase. Sherwood numbers obtained from observed values of reduction rates and empirical equation of the gas‐phase mass transfer rate are correlated by equation . The values of mass transfer coefficient in gas phase calculated from Sherwood numbers are consistent with the values of apparent reduction rate constant and with estimated rate constant of chemical reaction of liquid Fe1‐xO reduction.

Interfacial kinetics of hydrogen with liquid slag containing iron oxide

“…Equation [13] is only the The reduction rate of pure liquid Fe t O with reducing gases has been measured by some researchers. [2,6,7,11,[29][30][31][32] The empirical overall rate equation. Figure 11 demonstrates the temperature dependence of temperature dependence of the apparent rate constant in the reduction of pure liquid Fe t O with CO and H 2 is presented the reported apparent reduction rate of pure liquid Fe t O with hot metal (system (2)).…”

Experimental Investigation on Optimal Carbon/Hydrogen Ratio for Developing Iron Bath Reactor with H2–C Mixture Reduction

“…So far much attention in world has been paid to smelting reduction technology, where non‐coking coal and fine iron ore can be directly used with the advantages of light pollution, compared with traditional blast furnace process 1. Great number of investigations on carbon as reductant in iron oxide reduction have been reported 2–15. Nevertheless, few studies on smelting reduction with hydrogen and less on mixture reduction with carbon/hydrogen were reported until now.…”