Abstract: For coal-fired power plant of coal spontaneous combustion tendency and features,Through the experimental study,three kinds of lignite,three kinds of bituminous coal,three kinds of anthracite have selected to research the coal heating rate characteristics for temperature oxidation,the field experimental results showed that lignite has the largest temperature oxidation heating rate,while anthracite has minimal. And the scene to carry out the study of coal storage test, the experimental results also showed that with the increase of laboratory lignite storage time,the coal average particle size decreases for the decreasing of large particles and increasing of small particles. The coal temperature early warming faster,late rising slowly,coal calorific value decreased.

Key words: coal-fired power plants, coal, spontaneous combustion tendency, field testing study, temperature increasing rate