form lumps or masses of coke

burn freely

show little or no fusing action

burn completely

heated sufficiently

burnt in excess air

heated to its ignition point

burnt as powder

various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as per-cents by volume

various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight

fuel constituents as percent by volume of moisture, volatile, fixed carbon and ash

fuel constituents as percent by weight of moisture, volatile, fixed carbon and ash

various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as per-cents by volume

various chemical constituents, carbon, hydrogen, oxygen, etc. plus ash as per-cents by weight

fuel constituents as percent by volume of moisture, volatile, fixed carbon and ash

fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash

provide air around burners for obtaining optimum combustion

transport and dry the coal

cool the scanners

convert CO (formed in lower zone of furnace) into C02 at higher zone.