部分還元処理による鉄鉱石中りんのダイカルシウムシリケート相への濃化

抄録

It is necessary to develop an innovative iron-making technology for low-grade iron ore containing a high concentration of P. In this study, we propose a new process for enriching phosphorus in the C₂S phase by mixing high-P iron ore, CaO, and graphite in appropriate proportions and partially reducing it. In this study, high-P iron ore adjusted to various basicities and reducing agent ratios was heated at 1573 K in Ar atmosphere, and the obtained sample was analyzed by EPMA. The results showed that in the reduced sample obtained under the conditions of C/S = 2.0 and Target Fe_tO = 60%, more than 95% of P was distributed to the C₂S phase, and the P content in metallic iron was sufficiently low.