金属学报  1983, Vol. 19 Issue (1): 1-8

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CaF_2基熔渣中MgO的活度

陈崇禧;赵文祥

北京钢铁学院;北京钢铁学院

ACTIVITY OF MgO IN MOLTEN SLAGS WITH CaF_2 BASE

CHEN Chongxi; ZHAO Wenxiang (Beijing University of Iron and Steel Technology)

陈崇禧;赵文祥. CaF_2基熔渣中MgO的活度[J]. 金属学报, 1983, 19(1): 1-8.
, . ACTIVITY OF MgO IN MOLTEN SLAGS WITH CaF_2 BASE[J]. Acta Metall Sin, 1983, 19(1): 1-8.

摘要 参考文献 相关文章 Metrics 全文: PDF(608 KB)   摘要: 以化学平衡法在N_(Al_2O_3)≤0.16,N_(MgO)≤0.30,N_(CaO)≤0.30范围内于1600和1650℃测定了CaF_2基电渣熔渣中MgO活度,研究了MgO,Al_2O_3和CaO对MgO活度的影响。绘制了CaF_2-MgO-Al_2O_3系和CaF_2-MgO-CaO-Al_2O_3(N_(Al_2O_3)=0.07)系MgO等活度线的组成图。α_(MgO)随N_(MgO)增加而增大。Al_2O_3于1600℃是强烈降低γ_(MgO)的物质;而在1650℃,当N_(MgO)<0.15时,Al_2O_3却是提高γ_(MgO)的物质;N_(MgO)为0.16附近存在Al_2O_3对α_(MgO)影响不敏感区。 Abstract：An investigation was made of the activity of MgO, α_(MgO), in molten electrorefining slags with CaF_2 base of the concentrations N_(Al_2O_3)≤0.16, N_(MgO)≤0.30 and N_(CaO)≤0.30 at 1600 and 1650℃, and of the influence of MgO, Al_2O_3 and CaO contents on it as well. The diagrams of iso-activity for systems CaF_2-MgO-Al_2O_3 and CaF_2-MgO-CaO-Al_2O_3 (N_(Al_2O_3)=0.07) were constructed. It was found that the α_(MgO) increases rapidly with the increase of N_(MgO). However, the behaviour of Al_2O_3 is quite changeable, at 1600℃ it decreases violently the activity coefficient of MgO, γ_(MgO); at 1650℃ acts as one to increase γ_(MgO) if N_(MgO)<0.15 and is insensitive to α_(MgO) in the limits of N_(MgO) about 0.16. In the present study, α_(MgO) referred to solid as a function of component contents in the system CaF_2-MgO-Al_2O_3 at 1600 and 1650℃ may be expressed as follows: At 1600℃ α_(MgO)=2.89N_(MgO)-2.07N_(MgO)~2+0.081N_(MgO)~3-(55.23N_(Al_2O_3)-644.3N_(Al_2O_3)~2+2427N_(Al_2O_3)~3)N_(MgO)-56.12N_(Al_2O_3)N_(MgO)~2+373.1N_(Al_2O_3)N_(MgO)~3 At 1650℃ α_(MgO)=0.898N_(MgO)+2.73N_(MgO)~2-2.42N_(MgO)~3+(60.8N_(Al_2O_3)-120.8N_(Al_2O_3)~2+350N_(Al_2O_3)~3)N_(MgO)-77.5N_(Al_2O_3)N_(MgO)~2+ 1036N_(Al_2O_3N_(MgO)~3 In system CaF_2-MgO-CaO-Al_2O_3(N_(Al_2O_3)=0.07), CaO is found to be increasing γ_(MgO) at 1600℃ and varied its effect at 1650℃ with various N_(MgO). The expres-sion of α_(MgO) at 1650℃ in this system may be shown as: α_(MgO)= 4.67N_(MgO)-30.7N_(MgO)~2+70.1N_(MgO)~3- N_(CaO)(17.5N_(MgO)-208.4N__(MgO)~2+521N_(MgO)~3) 收稿日期: 1983-01-18      服务 把本文推荐给朋友 加入引用管理器 E-mail Alert RSS 作者相关文章 陈崇禧 赵文祥 44.8K 链接本文: https://www.ams.org.cn/CN/      或      https://www.ams.org.cn/CN/Y1983/V19/I1/1 No related articles found! Viewed Full text Abstract Cited   Shared      Discussed