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Most promising methods for the reduction of Fe ore are those involving the production of CO and direct reduction by the latter, particularly that of Bourcoud and the newly developed process of Gandini. The Bourcoud process is described in detail, with a general discussion of the physical chemistry involved in the reduction of Fe oxides by CO. The velocity of this reduction and the yield of Fe at a given temperature are shown to be functions of the pressure and concentration of the CO, of the square root of its kinetic energy at the moment of impact with the oxides, of the absolute number of CO molecules, and of the degree of subdivision of the Fe ore. |