Activity of CaO in CaO-SiO2-Al2O3-MgO Slags

作者：Wen, Qiulin; Shen, Fengman; Zheng, Haiyan^*; Yu, Jiyang; Jiang, Xin; Gao, Qiangjian

来源：ISIJ International, 2018, 58(5): 792-798.

DOI：10.2355/isijinternational.ISIJINT-2017-735

• activity of CaO
• CaO-SiO2-Al2O3-MgO system
• blast furnace
• reference slag
• w(MgO)/w(Al2O3)

The activity of CaO in CaO-SiO2-Al2O3-MgO slags for blast furnace smelting was determined by a modified slag metal equilibrium technique with Sn as the solvent metal and a known a((CaO)) slag as the reference slag. iso-activity contours of CaO in the CaO SiO2-Al2O3-MgO pseudo-ternary system at w(Al2O3)=15% and w(MgO)/w(Al2O3)=0.35 were achieved from the measured values. Effects of R (basicity, R=w(CaO)/w(SiO2)), w(MgO)/w(Al2O3) and w(Al2O3) on a((CaO)) were discussed. R was significant on a((CaO)) and a((CaO)) increased obviously with the increase of R at 1 873 K. a((CaO)) increased with the increase of w(MgO)/w(Al2O3) when R is 1.05 and w(Al2O3) is 15%. However, the effect of w(MgO)/w(Al2O3) on aaicao was not obvious for the slags with R=1.20. With the increase of w(Al2O3), a((CaO)) decreased at fixed R=1.05 and w(MgO)/w(Al2O3)=0.35. When R is 1.20, a((CaO)) increased with the increase of w(Al2O3).

• 出版日期2018
• 单位东北大学