Abstract
The author carried out experiments on the reduction of Silicon out of silica in iron ores. The ore, crushed into Small pieces, was reduced with Carbon monoxide and the reduced iron was carburised at high temperatures upto 1350°C. The pig iron, thus produced was analysed. The results of the experiments were as follows
1. The Silicon content of the pig iron produced from the self-fluxing ore was very much small compaired with that of the pig iron from the quartziferous iron ore.
2. The pig iron from the self-fluxing ore had much finergraphide structure than that of the quartziferous ore.
3. The reduction of silicon scarcely occured in Carbon monoxide gas, but was accelerated as the gas was diluted with Nitrogen. Too much diluted Carbon monoxide gas, however, delayed the carburization of the reduced iron and the long time was required for the production of pig iron and reduction of silicon.
4. The author carried out also the experiments on the reduction of silicon with electric iron as Hans Meyer's (Mitt. Kaiser-Wilh. Inst. Bd 9 Ueber die Reduktion von MnO, SiO2 und P2O5 im Hoch ofen)
The electric iron was covered with the mixture of silica and charcoal powder and heated in the electric furnace in the atmosphere of Nitrogen and in the mixture of 62% Nitrogen and 38% Carbon monoxide gases, during 1 hour at the temperature of 1, 266°C
The Silicon content of the iron, which heated in Nitrogen was 19% and the other contained only 0.46% Silicon Dr. Wast has quoted in his piper "Eine neue Theorie des Hochofen Verfahren" the results of the Hans Meyer's for confermation of his theory. The Meyer's experiments. however, has feen carried out in Nitrogen and Hydrogen, accordingly it is wrong to apply the results to the blast furnace reaction.
