Phase equilibria in high MgO ferro-manganese and silico-manganese smelting slags

被引：9
作者：
Zhao, B [1 ]
Jak, E [1 ]
Hayes, PC [1 ]
机构：
[1] Univ Queensland, Sch Engn, Pyromet Res Ctr, PYROSEARCH, Brisbane, Qld 4072, Australia
来源：
ISIJ INTERNATIONAL | 2005年 / 45卷 / 07期
关键词：
slag; equilibria; MnO"-CaO-MgO-SiO2-Al2O3; liquidus;
D O I：
10.2355/isijinternational.45.1019
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
Liquidus isotherms and phase equilibria have been determined experimentally for a pseudo-ternary section of the form "MnO"-(CaO+MgO)-(SiO2+Al2O3) with a fixed Al-2,O-3,/SiO2, weight ratio of 0.17 and MgO/CaO weight ratio of 0.17 for temperatures in the range 1473-1673 K. The primary phase fields present for the section investigated include manganosite (Mn,Mg,Ca)O; dicalcium silicate alpha-2(Ca,Mg,Mn)O (.) SiO2; merwinite 3CaO(.) ((Mg,Mn)O.2SiO(2); wollastonite [(Ca,Mg,Mn)(OSiO2)-Si-.]; ;tephroite [2(Mn,Mg)O.SiO2]; rhodonite [(Mn,Mg)O. diopside [(CaO,MgO,MnO,Al2O3)(SiO2)-Si-.]; tridymite (SiO2), SiO2] and melilite [2CaO (.) (MgO,MnO,Al2O3).2(SiO2,Al2O3)]. The liquidus temperatures relevant to ferro-manganese and silico-manganese smelting slags have been determined. The liquiclus temperature is shown to be principally dependent on the modified basicity weight ratio (CaO+Mgo)/(SiO2+Al2O3) at low MnO concentrations, and dependent on the mole ratio (CaO+ MgO+MnO)/(SiO2+Al2O3) at higher MnO concentrations.
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页码：1019 / 1026
页数：8
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