脱酸反応帯について

Abstract

The deoxidation reaction zone at an early stage of the deoxidation process of liquid iron and at its reoxidation was investigated, and the following results were obtained. At the dissolving stage of the deoxidizer, a non-metallic phase rich in FeO would be able to nucleate homogeneously for a low supersaturation of the Fe-Mn-Si-Al-O system. This shows that the deoxidation reaction begins in the vicinity of the top of diffusion of deoxidizing elements. At the growth stage of the inclusion, activities of the deoxidizing elements at the surface of the inclusion will depend on the supply velocity of each element to the surface of the inclusion. So in the above-mentioned reaction zone, the composition of the inclusion, which can be determined by the activities will be greatly influenced by the diffusion of each element. The experimental data obtained by other investigators appear to support our predictions.An experimental apparatus satisfying the conditions of the above-mentioned reaction zone was described. From the experimental results it has been concluded that the FeO-rich inclusions produced in the reaction zone change their compositions and sizes by the various types of reactions with liquid iron containing Si and Mn during floating up in the liquid iron.