(1. 蘇州大學(xué) 沙鋼鋼鐵學(xué)院，蘇州 215021；
2. 上海大學(xué) 省部共建高品質(zhì)特殊鋼冶金與制備國(guó)家重點(diǎn)實(shí)驗(yàn)室，上海 200072；
3. 河北工業(yè)職業(yè)技術(shù)學(xué)院 材料工程系，石家莊 050091)
摘 要: 基于熔渣結(jié)構(gòu)的離子與分子共存理論和Butler方程建立了MgO-B2O3-SiO2-CaO-Al2O3體系表面張力計(jì)算模型，計(jì)算了該體系及其子體系表面張力值，考察了熔渣表面張力隨熔渣組分的變化規(guī)律，以期為富硼渣調(diào)控和綜合利用提供參考。結(jié)果表明：本模型計(jì)算的熔渣表面張力值與實(shí)驗(yàn)值吻合較好，模型平均相對(duì)誤差為9.03%。含B2O3的二元體系中，B2O3組元顯著降低熔渣表面張力，純氧化物表面張力值與形成氧化物陽(yáng)離子的靜電勢(shì)及氧化物中離子鍵的分?jǐn)?shù)有關(guān)。含B2O3的多元體系中，熔渣表面張力隨著B(niǎo)2O3含量的增加而顯著降低，但隨著MgO和SiO2質(zhì)量比、CaO含量和Al2O3含量的增加而逐漸增大，且CaO和Al2O3含量對(duì)含B2O3渣表面張力的影響基本相當(dāng)。
關(guān)鍵字: MgO-B2O3-SiO2-CaO-Al2O3熔渣；表面張力；組分含量；共存理論；計(jì)算模型
（1. School of Iron and Steel, Soochow University, Suzhou 215021, China;
2. State Key Laboratory of Advanced Special Steel, Shanghai University, Shanghai 200072, China;
3. Department of Materials Engineering, Hebei Institute of Vocational and Technique, Shijiazhuang 050091, China）
Abstract:Based on the coexistence theory of ions and molecules of molten melt structure and Butler’s equation, a thermodynamic model was developed to establish the surface tension of MgO-B2O3-SiO2-CaO-Al2O3 system and its sub-system. The relationship between the composition and surface tension was investigated, which provided reference for the regulation and comprehensive utilization of boron-rich slag. The results indicate that the calculated value of surface tension agrees well with the literature data, and the average error is about 9.03%. The surface tension of molten slag decreases with increasing the B2O3 component significantly in binary system. The surface tension value of pure oxide is related to the electrostatic potential of cations and the ion bond percentage in oxide. The surface tension in multi-component system increases with increasing the mass ratios of MgO to SiO2, the CaO content and Al2O3 content, and the effect of CaO on surface tension is the same as that of Al2O content.
Key words: MgO-B2O3-SiO2-CaO-Al2O3 molten slag; surface tension; component content; coexistence theory; calculating model
