■ CLASSIFICATION OF COAL.
2. LIGNITE (Brown coal)
◇ Contains 40 to 55 per cent carbon.
◇ Moisture content is high (over 35 per cent).
◇ It undergoes spontaneous combustion (this is undesirable because it creates fire accidents in mines).
2. LIGNITE (Brown coal)
◇ Contains 40 to 55 per cent carbon.
◇ Moisture content is high (over 35 per cent).
◇ It undergoes spontaneous combustion (this is undesirable because it creates fire accidents in mines).