Kinetics of non-isothermal precipitation process of perovskite phase in oxidized Ti-bearing blast furnace slag

Kinetics of non-isothermal precipitation process and crystal growth of perovskite phase in oxidized Ti-bearing slag were investigated. The oxidized slag was obtained by blowing the air into the molten Ti-bearing blast furnace slag through a lance. The experimental results show that the cooling rate...

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Published in:Transactions of Nonferrous Metals Society of China 2007-11, Vol.17 (A01), p.584-588
Main Author: 王明玉 贺跃辉 王学文 娄太平 隋智通
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氧化技术
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description Kinetics of non-isothermal precipitation process and crystal growth of perovskite phase in oxidized Ti-bearing slag were investigated. The oxidized slag was obtained by blowing the air into the molten Ti-bearing blast furnace slag through a lance. The experimental results show that the cooling rate has important effect on precipitation and growth of perovskite phase in oxidized slag; the lower cooling rate is in favor of not only the increase of the volume fraction of perovskite phase, but also the growth of perovskite phase grain sizes. The particle coarsening in non-isothermal process has important effect on the crystal growth of perovskite phase. The relative volume fraction of perovskite phase could be approximately described by JMAK equation, and the experiential expression of the average crystal radius of perovskite phase was also obtained.
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title Kinetics of non-isothermal precipitation process of perovskite phase in oxidized Ti-bearing blast furnace slag
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