Thermochemical properties of low-basicity dephosphorization slags -Liquidus compositions and activities in CaO-SiO2-P2O5-FeO heterogeneous slags-
Project/Area Number |
15K06524
|
Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Metal making/Resorce production engineering
|
Research Institution | Kyoto University |
Principal Investigator |
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Research Collaborator |
MIWA Kohei
MATSUGI Ryota
|
Project Period (FY) |
2015-04-01 – 2018-03-31
|
Project Status |
Completed (Fiscal Year 2017)
|
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)
|
Keywords | 低塩基度スラグ / 状態図 / 活量 / リン分配比 |
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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Report
(4 results)
Research Products
(13 results)