Kiln Gas Velocities

Upper Limit-Velocity (m/s)
Through cooler grate 5
Hood 6
Under cooler bull-nose 15
Burning zone (1450
C) 9.5
Feed end transition (1000
o
C) 13
Riser 24
o
Preheater gas ducts 18

Lower Limit-Velocity (m/s)
Tertiary duct 25
Pulverized coal conveying 25