堆积密度对炼焦煤膨胀性能影响的研究

研究了典型七台河新建1/3焦煤和桃山焦煤在不同堆积密度条件下的Audibert-Arnu膨胀性能及 G b因子变化规律。结果表明：煤料堆积密度提高后，其开始软化温度增加，开始膨胀温度降低；当煤料堆积密度从0.88 t/m 3增加到1.19 t/m 3 时，新建煤1/3焦煤的开始软化温度增加 30 ℃，桃山焦煤增加14 ℃，新建1/3焦煤的开始膨胀温度降低19 ℃，桃山焦煤降低15 ℃；同时，随煤料堆积密度提高，其最大膨胀度增加，膨胀温度区间也呈增加趋势； G b因子随煤料堆积密度提高而呈增加规律。

Effect of bulk density of coking coal on Audibert-Arnu dilatation

The coal bulk density significantly influences the coal dilatation during the coking process.Based on typical samples of Xinjian 1/3 and Taoshan coking coals from Qitaihe(Heilongjiang Province),the effects of bulk density on the Audibert-Arnu dilatation behavior including initial softening temperature,dilatation starting temperature,maximum dilatation and variation of Gb factor were investigated.Experimental results demonstrate that higher coal bulk density improves the initial soften temperature but decreases the dilatation starting temperature.When the bulk density is increased from 0.88 to 1.19 t/m3,the initial soften temperature of Xinjian coal and Taoshan coal is increased by 30 and 14 ℃,respectively.But the starting dilatation temperature of Xinjian coal and Taoshan coal is lowered by 19 and 15 ℃,respectively.Higher bulk density clearly increases the percent dilatation and its temperature range.Gb factor of the coals is also increased with the coal bulk density.