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- W2606989635 abstract "The reductions of ilmenite ore by hydrogen were studied over a temperature range of 650° to 800°C with thermobalance. The overall reaction is found to consist of two stages and the rate of reduction can be described as follows;-d (1-x)/dt=k (1-x) 1-n where x is fraction of reaction, t is time, k is rate constant and 1-n is reaction order. And then, the reasonable mechanisms of reduction may be presumed as follows;(a){Fe2O3 TiO2 (1)} 1st stage→Fe TiO2 (b){FeO TiO2} 2nd stage→Fe TiO2 (c){Fe2O3 TiO2 (11)} roasted→Fe TiO2The rate of reduction for reaction (c) was much larger than those of (a) and (b). The reaction order (1-n) was 0.84, 0.89, 0.68, 0.77 and 0.67, and the apparent activation energy was 21, 28, and 30 kcal/mol. for (a), (b) and (c) respectively. The reduction rate was found to be approximately proportional to hydrogen partial pressure in mixture of H2 and N2 gas." @default.
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- W2606989635 date "1965-01-01" @default.
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- W2606989635 title "Kinetic Studies of the Reduction of Ilmenite Ore by Hydrogen" @default.
- W2606989635 doi "https://doi.org/10.2473/shigentosozai1953.81.927_621" @default.
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