KILN AND CALCINER VELOCITY (FOR SLC CALCINER)

INPUT DATAS CALCULATIONS AND RESULTSName of the Plant CACINERMean sea level 200 m Barometric pressure 10077 mmwcProduction 5000 tpd % calcination 96.37 %Feed factor 1.59 Theoritical air required for combustion 0.55176 Nm3/Kg clKiln firing ratio 40 % Excessair 0.083 Nm3/Kg clCalciner firing ratio 60 % Moisture 0.079 Nm3/Kg clCoal consumption 0.22 Kg/Kg cl Combustion gases generated 0.587 Nm3/Kg clNet Calorific value 3800 Kcal/Kg coal CO2 generated 0.197 Nm3/Kg clHumidity of air 0.1 Kg/Kg air Total gases 0.945 Nm3/Kg clKiln diameter 4.35 m 4.384 m3/Kg clKiln length 67 m Total Volumetric flow of gases 15221 m3/minCalciner diameter 7.5 m Calciner velocity 5.74 m/sCalciner height 44 m Retention time 7.66 sLOI of feed 36 %LOI of last stage material 2 % KILNLOI of material entering calciner 30 % Theoritical air required for combustion 0.368 Nm3/Kg clExcess air 15 % Excess air 0.055 Nm3/Kg cl% feed to Kiln string 40 % Moisture 0.053 Nm3/Kg cl% feed to calciner string 60 % Combustion gases generated 0.391 Nm3/Kg clBurning zone temperature 1450 C Total gas 0.499 Nm3/Kg clCalciner temperature 950 C 3.148 m3/Kg clCalciner pressure 100 mmwc Total Volumetric flow of gases 10932 m3/min

Velocity through kiln 14.88 m/s

Input yellow cells

SLC

KILN AND CALCINER VELOCITY (FOR ILC CALCINER)

INPUT DATAS CALCULATIONSName of the PlantMean sea level of the plant 240 m CACINERProduction 1000 tpd Barometric pressure 10026 mmwcFeed factor 1.58 Theoritical air required for combustion 0.545 Nm3/Kg clKiln firing ratio 45 % Excess air 0.109 Nm3/Kg clCalciner firing ratio 55 % Moisture 0.081 Nm3/Kg clCoal consumption 0.2 Kg/Kg cl Combustion gases generated 0.579 Nm3/Kg clNet Calorific value 4500 Kcal/Kg coal CO2 generated 0.193 Nm3/Kg clHumidity of air 0.1 Kg/Kg air Total gases 0.962 Nm3/Kg clKiln diameter 3 mKiln length 42 m KILNCalciner diameter 7.8 m Theoritical air required for combustion 0.446 Nm3/Kg clCalciner height 23 m Excess air 0.089 Nm3/Kg clLOI of feed 36 % Moisture 0.067 Nm3/Kg clLOI of last stage material 5 % Combustion gases generated 0.474 Nm3/Kg clCalcination of material entering calciner 30 % Total gas 0.629 Nm3/Kg clExcess air 20 % 3.9 m3/Kg clBurning zone temperature 1400 C 2677.6 m3/minCalciner temperature 895 C Total amount of gas passing thru calciner 1.59 Nm3/Kg clCalciner pressure 160 mmwc 7.13 m3/Kg cl% calcination 95.00 % Total Volumetric flow of gases 4950 m3/min

RESULTS RESULTS

Calciner air velocity 1.93 m/s Retention time in calciner 11.89 sVelocity through the kiln 8.41 m/s

ILC