By using thermobalance and coal comprehensive test instrument，the coal ignition information of both the kindling point and the burning time were studied.
该方法
好，煤焦中含灰越高，着火所需时间越长。
By using thermobalance and coal comprehensive test instrument，the coal ignition information of both the kindling point and the burning time were studied.
该方法好，煤焦中含灰越高，着火所需时间越长。
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