PHOSPHORUS PARTITION BETWEEN FE-CR-C MELTS AND BAO-BAF2 FLUXES AND THE ACTIVITY OF BAO

被引：22

作者：

HARA, T ^{[1
]}

TSUKIHASHI, F ^{[1
]}

SANO, N ^{[1
]}

机构：

[1] UNIV TOKYO,FAC ENGN,TOKYO 113,JAPAN

来源：

TETSU TO HAGANE-JOURNAL OF THE IRON AND STEEL INSTITUTE OF JAPAN | 1990年 / 76卷 / 03期

关键词：

D O I：

10.2355/tetsutohagane1955.76.3_352

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The phosphorus partition between BaO-BaF2 fluxes and Fe-Cr-Csatd. alloys was measured at temperatures ranging from 1 175°C to 1 300°C under a CO atmosphere. The phosphorus partition ratio increases with increasing BaO content in the fluxes and decreases with increasing chromium content in Fe-Cr-Csatd. alloys. The BaO-BaF2 system has a large phosphate capacity ranging from 1026 to 1028.5 at 1 300°C, which is larger than that for the CaO-CaF2 system. The enthalpy change for the dephosphorization reaction by BaO-bearing fluxes was -528 kJ/mol. The chromium partition ratio increases with an increase in BaO content especially in the higher BaO content range. The possibility of the removal of phosphorus from Fe-16% Cr-C alloys without much oxidation loss of chromium by using 50% BaF-50% BaF2 flux was demonstrated. The activity of BaO for the BaO-BaF2 system was determined at 1 200°C and 1 300°C and the activity of BaF2 was calculated by using the Gibbs-Duhem relationship. The phase diagram for the BaO-BaF2 system is also discussed.

引用

页码：352 / 359

页数：8

共 15 条

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