68.貯炭パイルの自然発熱性評価手法

抄録

Spontaneous combustion of a huge coal stockpile brings large loss, and it also influences harmfully to the environment. Therefore, it is necessary to collect and analyze the data of the stockpile to minimize the damage. We have provided a large-scale coal station and have traded more than 50 brands of coal by 85,000,000 tons in 20 years. In such a background, we have piled up data and know-how concerning the spontaneous combustion. We tried ranking the propensity of the spontaneous combustion of each brand by using a large amount of data of the coal stockpile temperature. Two simple methods of evaluating the propensity of the spontaneous combustion were established in the laboratory. Since by this technique the information about the coal temperature is easily available beforehand, more efficient action can be given to suppress heating.