2553.     PADOVANI, C., AND BAYAN, S.  [Reduction of Ferric Oxide With Mixtures of Carbon Monoxide and Hydrogen.]  Ann. chim. applicata, vol. 24, 1934, pp. 394-409; Chem. Abs., vol. 29, 1935, p. 419.

        Influence of time of contact on the reduction of Fe₂O₃ made from calcined siderite, by a mixture of CO and H₂, in the same proportions as in water gas, has been studied.  A phase of complete combustion was noted, which is independent of the velocity or time of contact, within the limits used (temperature 950°), and which ends abruptly when a definite percentage (44.8) of the available O₂ from the Fe₂O₃ is consumed.