| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
In steelmaking processes, there are incentives to reduce slag volume and CaO consumption. Towards better understanding of the phosphorus removal from hot metal with low-basicity slags, electrochemical technique incorporating MgO-stabilized zirconia was conducted to measure simultaneously the activities of FeO and P2O5 within heterogeneous CaO-SiO2-P2O5-FeO slags. The FeO activity was fairly insensitive to the variation of Ca3P2O8 content in solid solutions between Ca2SiO4-Ca3P2O8, while the P2O5 activity increased with an increase in Ca3P2O8 content. In this study, the liquidus compositions were also determined in the quaternary system CaO-SiO2-P2O5-FexO at 1573 K. By using the present experimental results, phosphorus distribution ratios were estimated between molten slag and carbon-saturated iron. The relationship between phosphorus distribution ratio and FeO content in molten slag was consistent with the phase diagram of the pseudo-ternary CaO-(SiO2+P2O5)-FeO system.
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