Na_2O-SiO_2 系スラグ中の硫黄の状態および硫黄と鉄の相互作用

概要

論文の詳細を見る
From the standpoint of external desulphurization, state of sulphur and sulphur-iron interaction in Na_2O-SiO_2 slags were investigated by optical absorption, electron spin resonance(ESR) and S K_α X-ray emission spectroscopies. An optical absorption was observed near 24000cm^<-1> in the slags produced in the intermediately (P_<O_2>=10^<-5.1>atm.) and strongly (P_<O_2>=10^<-6.7>atm.) reducing atmospheres. The absorption was assigned to polysulphide ions consisting of several sulphurs. Fe^<3+>-S^<2-> interaction was suggested from the increase of the intensity of ESR absorption near g=6.0 in the slags produced in the strongly reducing atmosphere. Chemical shift study of S K_α X-rays in the slags indicated that sulphur atoms are in the form of S^<6+> ions in oxidizing condition (P_<O_2>=0.21atm.) and in the mixed state of S^<6+> and S^0 in the reducing conditions. It was concluded from these results that, in Na_2O-SiO_2 slags, polysulphide ions such as S^-_2 are formed as intermediate stage with reducing partial oxygen pressure of atmosphere. Further, it was indicated that Fe^<3+>-S^<2-> interaction begins to occur in the vicinity of P_<O_2>=10^<-6>∿10^<-7>atm.
社団法人日本鉄鋼協会の論文
1981-08-01