3.5 Storage of Coal
There are two routes for coal storage.
1.Air isolation
Exposure to air leads to coals
weatheringweathering and reduces its heat value.Strategic or large commercial
coal storage requires air isolation from coal.This can be realized in the
following methods: compressing coal into briquettesbriquette widely used in
China，storing coal in an inert gasinert gas n.phr.storing coal in water，and storing
coal in semienclosed slots coal fieldsemienclosed slots coal field.
2.Ventilation
Ventilation，a cheaper method，is usually
adopted in smallscale storage.Air ductsair duct are installed in the coal heapcoal
heap to ensure the airflow，which reduces coals natural combustion but not its weathering.
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