This paper analyses the existing literature, and？considered the new problems caused by the burning accident of thermal insulation materials attached to the steel structure in recent years.？In the process of combustion, thermal insulation materials will drip and melt, producing a large amount of liquid fuel. The combustion of thermal insulation materials attached to steel (diameter？longer than 0.2？m) can be regarded as large pool fire combustion, and a mathematical model is established to study the reverse thermal conduction behavior of the combustion of combustible materials attached to steel.
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