Bottom ash and flyash having high LOI is reburned in a pulverized coal furnace. The bottom ash is added to the coal supply before the coal is pulverized. Flyash is added to the pulverized coal stream for injection with the pulverized coal or is separately injected (10) into the furnace (20) at or slightly above the level of the coal burners (30) in the furnace (20). The bottom ash and flyash is added to the coal in direct proportion of 1 % to 3.5 % of the coal.
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