【摘要】 实验室条件下考察了五种不同类型的煤经不同加热速度处理后，煤中碳对ＣＯ２化学反应性及单位质量碳的气化反应速度常数特殊反应速度常数的变化规律．研究结果表明：适于直接还原回转窑窑头喷煤用的高挥发分煤，经不同加热速度处理后煤中碳对ＣＯ２化学反应性和特殊反应速度常数发生明显变化，随加热速度增大而明显增大．这一研究结果为直接还原回转窑窑头喷煤强化还原的机理研究提供了依据．更多还原

【Abstract】 The changing law of carboxyreactivity ( α ) and gasification reaction for special rate constant ( K m) of five different kinds of coals were treated at different heating speeds: α and K m of low rank coal had a great change. Both increased greatly with an increase in heating speed. This provided basis for strengthening mechanism of iron ore reduction in rotary kiln with grained coal injected from discharge end.更多还原