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首页> 外文期刊>International Journal of Minerals,Metallurgy and Materials >Investigation of the kinetic mechanism of the demanganization reaction between carbon-saturated liquid iron and CaF2-CaO-SiO2-based slags
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Investigation of the kinetic mechanism of the demanganization reaction between carbon-saturated liquid iron and CaF2-CaO-SiO2-based slags

机译：碳饱和液铁和CAF2-CAO-SiO2渣中脱锰反应动力学机理的研究

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摘要

The demanganization reaction kinetics of carbon-saturated liquid iron with an eight-component slag consisting of CaO-SiO2-MgO-FeO-MnO-Al2O3-TiO2-CaF2 was investigated at 1553, 1623, and 1673 K in this study. The rate-controlling step (RCS) for the demanganization reaction with regard to the hot metal pretreatment conditions was studied via kinetics analysis based on the fundamental equation of heterogeneous reaction kinetics. From the temperature dependence of the mass transfer coefficient of a transition-metal oxide (MnO), the apparent activation energy of the demanganization reaction was estimated to be 189.46 kJ center dot mol(-1) in the current study, which indicated that the mass transfer of MnO in the molten slag controlled the overall rate of the demanganization reaction. The calculated apparent activation energy was slightly lower than the values reported in the literature for mass transfer in a slag phase. This difference was attributed to an increase in the "specific reaction interface" (SRI) value, either as a result of turbulence at the reaction interface or a decrease of the absolute amount of slag phase during sampling, and to the addition of calcium fluoride to the slag.
机译：在该研究的1553,1623和1673K中研究了由CaO-SiO2-MgO-FeO-MNO-Al 2 O 3-TiO2-CaF2组成的八组分渣的碳饱和液铁的脱锰反应动力学。通过基于异质反应动力学的基本方程，通过动力学分析研究了对热金属预处理条件的脱盐反应的速率控制步骤（RCS）。从过渡金属氧化物（MNO）的传质系数的温度依赖性，估计脱锰反应的表观活化能量是目前研究的189.46kJ中心点摩尔（-1），表明质量MNO在熔渣中转移控制脱锰化反应的总速率。计算出表观活化能量略低于文献中报告的渣阶段的质量转移中的值。这种差异归因于“特定反应界面”（SRI）值的增加，作为反应界面处的湍流的结果或取样过程中的绝对量的渣相的降低，并加入氟化钙至渣。

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