Activities of P2O5 in Solid Solutions between Di-calcium Silicate and Tri-calcium Phosphate at 1 573 K

被引：12

作者：

Saito, Taihei ^{[1
,2
]}

Nishimura, Toru ^{[1
,3
]}

Saito, Keijiro ^{[4
]}

Hasegawa, Masakatsu ^{[4
]}

机构：

[1] Kyoto Univ, Kyoto, Japan

[2] Nippon Steel Corp Ltd, 12 Nakamachi, Muroran, Hokkaido 0508550, Japan

[3] Mitsubishi Mat Corp, 7-147 Shimoishito, Kitamoto, Saitama 3640028, Japan

[4] Kyoto Univ, Dept Energy Sci & Technol, Sakyo Ku, Yoshida Hon Machi, Kyoto 6068501, Japan

来源：

ISIJ INTERNATIONAL | 2020年 / 60卷 / 12期

关键词：

dephosphorization; activity; di-calcium silicate; tri-calcium phosphate; solid solution; PHOSPHORUS; 2CAO-CENTER-DOT-SIO2-3CAO-CENTER-DOT-P2O5; PHASE; OXIDE;

D O I：

10.2355/isijinternational.ISIJINT-2020-181

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The knowledge of P2O5 activities in solid solutions between Ca2SiO4 and Ca3P2O8 is required for more effective dephosphorization. In the present study, firstly, the P2O5 activities in these solid solutions coexisting with CaO or CaSiO3 at 1 573 K were measured by equilibrating molten copper with oxide phases under a stream of Ar + H-2 + H2O gas mixtures. Subsequently, the sub-regular solution model was applied to Ca2SiO4-Ca3P208 solid solutions. The P2O5 activities calculated with the solution model agreed well with the present experimental results and the literature data. It was found that the P2O5 activity in Ca2SiO4-Ca3P2O8 solid solution coexisting with CaO was about 7 digits lower than that coexisting with CaSiO3

引用

页码：2780 / 2786

页数：7

共 34 条

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[34] Experimental Study of Ferrous Calcium Silicate Slags: Phase Equilibria at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {\text{P}}_{{{\text{O}}_{2} }} $$\end{document} Between 10−5 atm and 10−7 atm
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