中文摘要：

在一维炉试验台上研究了煤粉颗粒群在低氧浓度再燃条件下的均相着火规律．结果表明：在低氧浓度下（〈10％体积分数），煤粉均相着火呈现出反应不剧烈、不连续的特点；氧浓度对于煤粉均相着火温度的影响近似成指数变化关系，即氧浓度越低，均相着火温度越高；在一定范围内，氧浓度越低，煤粉均相着火延迟时间越长；煤粉均相着火温度随粒径减小而提高，近似成线性关系；不同氧浓度前提下，粒径对着火温度的影响作用不同．

英文摘要：

The law of homogeneous gas ignition temperature （GIT） of pulverized coal particle clusters was investigated on a one-dimensional furnace under reburning conditions with low oxygen concentration. Results show that the homogeneous ignition process of pulverized coal, under low oxygen concentration （less than 10 % by volume）, takes on the characteristics of weak and discontinuous reaction without strong flash. Oxygen concentration nearly exponentially influences the homogeneous GIT, which increases with reducing oxygen concentration. Within a certain range, the ignition time delay elongates with reducing oxygen concentration. Meanwhile, Homogeneous GIT increases with decreasing particle size in nearly linear relationship. The influence of particle size on ignition temperature changes with the variation of oxygen concentration.