Coke oven
SUBMITTED BY:-
1. SONU PATEL
2. PURUSHOTTAM PATEL
3. CHAYAN LAL MALAKAR
4. BHUSHAN PATEL
5. SAMEER KASHYAP
About :-
- JSPL has taken Non-recovery coke oven technology from SSIT,
China. It consists of two parallel Blocks of 8 batteries.
Each battery with 11 ovens.
The plant was commissioned in parts and is producing to the
rated capacity of 0.8 Million Tons/year.
Coking cycle of 64-66 Hours.
The plant is equipped with stamp charging facility, Charging
and pusher car and hot coke quenching car.
Process flow chart :-
Raw material handling system
The mined coals are imported from various ports like Paradeep, VSPL, Gopalpur &
Dhamra and are stored in RMH yard.
Coal from yards are then transferred to silos via conveyor.
SILO :-
• There is a reversible trolley above silos to feed coals to their respective silos.
• There are total of 9 silos in coke oven each having a capacity of 500T.
Each silo consist of a weigh feeder which is a continuous measuring and material flow control device,
which varies the speed of belt based on the set point.
Hammer mill :-
The coal from conveyor goes into the hammer mill for crushing.
The input generally have a size of +80mm which is reduced to -3mm.
Hammer mill consists of 84 hammers.
The hammer is made up of hammer arm, teeth and liner plate.
Coal tower :-
• Crushed coal blend from hammer mill is transferred to coal tower via conveyer belt.
Coal tower having a 500T capacity coal side and pusher side hopper.
• There is a Level radar detector to measure the coal tower level.
Stamping Machine
-The coal blend in the coal tower is first transferred to a mobile hopper from which the coal is
spread over the charging plate and stamped layers to form a cake using hydraulic rammers.
Coal moisture is maintained at 7% for the formation of cake.
Currently the pressure is maintained at 11MPa.
Stamping machine Is used to convert coal fines into a cake by Compression force the coal fines
Pusher/Charging car
1 ) It is used to charge the cake to the oven
2) Also it is used to push the cake which is already in the oven
3) After the charging is over carburizaton process start in the oven
Quenching Car
The ready coke from the oven is transported to quenching tower by quenching car.
It consists of a mild steel tray to carry the coke.
Quenching Tower
• The coke in the quenching car is quenched by an automatically-switch-on quenching pump.
• There are 2 quenching tower, one for Block 1 and one for Block 2.
• The quenched coke is tilted over the wharf at an angle of 30 deg. (Temp. 150 degree Celsius)
Cutter Building
•Coke from the wharf is charged over the PCCC1 conveyor which carries it to the cutter
building.
The cutter building consists of 2 cutters.
It consists of a vibro-feeder to properly distribute the coke over the 80 mm size screen. Coke of
+80 mm size is cut down while -80 mm is directly passed to CSBC1 conveyor.
Different products of coke oven
BF Coke : +25-80 mm (90% Generation)
Nut Coke : +10-25 mm (3% Generation)
Coke Fines: +0-10 mm (7% Generation)
• Usage of different fractions of coke in JSPL:
• BF Coke: The BF Grade coke is used in BF1 & BF2.
• Nut Coke: The Nut coke is used in BF1, BF2 & SAF.
• Coke Fines: The coke fines are used in sinter plant and SMS.
Advantage of coke oven
1. Essential for Steel Production - Provides high-quality coke for blast furnaces.
2. By-Product Recovery – Produces valuable by-products like coal tar and
benzene.
3. Energy Efficiency – Recovered gases can be reused as fuel.
4. Economic Growth - Supports steel, chemical, and energy industries.
5. Carbon Source – Used in multiple industries beyond steelmaking.
Disadvantages of coke oven
1. Environmental Pollution – Emits harmful gases and particulates.
2. High Energy Consumption -Requires significant fuel and electricity.
3. Health Hazards – Workers face exposure to toxic chemicals.
4. Greenhouse Gas Emissions - Contributes to climate change.
5. Expensive to Operate - High setup and maintenance costs.
