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本文对纯氟磷灰石在ＳｉＯ２存在下被炭还原过程中的物质传递及反应过程进行了探讨，导出了动力学方程，结合动力学实验数据回归表明反应受反应物在熔融液相中的扩散控制，其反应动力学方程式为：其中ｋ随配料硅钙比和反应温度变化．ｋ值随硅钙比变化呈直线关系；Ａｒｒｈｅｎｉｕｓ曲线在１２８０℃附近有折点，高温区表观活性化能为７９．４８ｋＪ／ｍｏｌ，而低温区的高度温度敏感使表观活化能高达１００５ＫＪ／ｍｏｌ。
In this paper, pure fluorapatite in the presence of SiO2 was carbon reduction process of mass transfer and reaction process was discussed, the kinetic equation was derived, combined with kinetic experimental data regression showed that the reaction by the reactant diffusion in the melt phase Control, the reaction kinetics equation: where k with the ingredients silicon and calcium ratio and reaction temperature changes. The k value is in a linear relationship with the change of Si / Ca ratio. The Arrhenius curve has a break point at 1280 ℃, and the apparent activation energy is 79.48kJ / mol in the high temperature region, while the high temperature sensitivity of the low temperature region makes the apparent activation energy reach 1005KJ / mol.