Effect of MgO and SiO2 on surface tension of fluoride containing slag
来源期刊：中南大学学报(英文版)2014年第11期
论文作者：DONG Yan-wu(董艳伍) JIANG Zhou-hua(姜周华) CAO Yu-long(曹玉龙) ZHANG Hong-kui(张洪奎) SHEN Hai-jun(沈海军)
文章页码：4104 - 4108
Key words：electroslag metallurgy; fluoride containing slag; surface tension; influence mechanism
Abstract: Surface tensions of slag addition MgO and SiO2 based on conventional 70%CaF2-30%Al2O3 and 60%CaF2-20%CaO-20%Al2O3 (mass fraction) at 1300 °C, 1400 °C and 1500 °C were investigated. Influence mechanism of MgO and SiO2 on slag surface tension was also analyzed. Results indicate that surface tension decreases with the increase of MgO content in the case of the MgO content (mass fraction) less than 8%, however, when MgO content (mass fraction) is from 8% to 30%, surface tension increases with the increase of MgO content. When SiO2 content (mass fraction) is from 2% to 8%, surface tension decreases with the increase of SiO2 content. Additionally, the relationship between surface tension and optical basicity is a monotonically increasing linear function. Research findings can provide important reference for slag design and the study of slag-metal interfacial tension.
DONG Yan-wu(董艳伍)1, JIANG Zhou-hua(姜周华)1, CAO Yu-long(曹玉龙)1, ZHANG Hong-kui(张洪奎)2, SHEN Hai-jun(沈海军)2
(1. School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China;
2. Baoshan Iron & Steel Co., Ltd., Shanghai 200940, China)
Abstract:Surface tensions of slag addition MgO and SiO2 based on conventional 70%CaF2-30%Al2O3 and 60%CaF2-20%CaO-20%Al2O3 (mass fraction) at 1300 °C, 1400 °C and 1500 °C were investigated. Influence mechanism of MgO and SiO2 on slag surface tension was also analyzed. Results indicate that surface tension decreases with the increase of MgO content in the case of the MgO content (mass fraction) less than 8%, however, when MgO content (mass fraction) is from 8% to 30%, surface tension increases with the increase of MgO content. When SiO2 content (mass fraction) is from 2% to 8%, surface tension decreases with the increase of SiO2 content. Additionally, the relationship between surface tension and optical basicity is a monotonically increasing linear function. Research findings can provide important reference for slag design and the study of slag-metal interfacial tension.
Key words:electroslag metallurgy; fluoride containing slag; surface tension; influence mechanism
