The Oxidation Dynamics of Ilmenite
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摘要: 通过研究钛铁矿中温区域和高温区域的氧化动力学, 探讨其氧化机理。其结果是在600~750℃时, 反应表观活化能为227.5 kJ/mol, 而在750~900℃时, 反应表观活化能则为99.25 kJ/mol。钛铁矿氧化反应在750℃时由晶格扩散转变为晶界扩散。因此钛铁矿的氧化反应是由O离子扩散所控制的。Abstract: In this paper,the oxidation mechanism of ilmenite was discussed by respectively studying the oxidation kinetics of ilmenite in medium and high temperature ranges.The apparent activation energies of the reactions are 227.50 kJ/mol and 99.25 kJ/mol in the temperature range of 600~750 ℃ and 750~900 ℃,respectively.The ilmenite oxidation reaction is transformed from lattice diffusion to grain boundary diffusion at 750 ℃.Therefore,the oxidation reaction of ilmenite is controlled by the diffusion of oxygen ions.
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Key words:
- ilmenite /
- oxidation roasting /
- oxidation dynamics /
- ion diffusion
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