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Calcined Petcoke Plant

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BASIC CALCINING PROCESS :

Petroleum coke calcining is a three step process, including drying, devolatilization and densification. The coke calcining process is a time-temperature function, conducted in an oxygen deficient atmosphere. Important control variables are heating rate, air addition rate and final calcination temperature. To obtain the calcined coke properties required by the carbon and graphite industries, the coke must be subjected to temperatures of 1150-1350 Deg C or higher to achieve density and conductivity.The final quality of the calcined coke is directly related to the specific characteristics and quality of the green coke fed to the calciner. While calcination cannot improve upon certain quality limits inherent in the green coke, potential quality can be lost by improper calcining.

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HOW IT WORKS : Coke calcining plants can be located in oil refineries, captive plants in aluminum smelters or merchant plants.

ROTARY KILN : The petroleum green coke is fed into a refractory lined rotary kiln where the volatiles are driven off during the calcining process in an oxygen deficient atmosphere. Air can be injected through the kiln shell to burn a portion of the volatile matter in the kiln providing usable heat to the kiln.

COOLING : Once the calcined coke is discharged from the kiln, the coke is cooled in a rotary cooler. At the feed end of the cooler, water is sprayed on the calcined coke to cool the coke to acceptable temperatures. The water evaporated in the process.

AFTERBURNER : The kiln exhaust gas is oxygen deficient and contains volatile matter released in the kiln. The kiln exhaust gas is directed to an afterburner (secondary combustion chamber) and air is injected to burn the volatiles and dust. A waste heat recovery boiler is used to produce steam from the heat contained in the afterburner exhaust gas.

FLEXIBILITY IN OPERATIONS : Metso rotary kilns can handle a wide range of green coke feeds including needle, sponge, shot, fluid or tar pitch green cokes. The rotary kiln is also able to optimize the coke calcining operating parameters, be it residence time, temperature gradient, and heat up rate, all of which impact product quality. Coke kilns can be fueled with: gas, heavy oil, oil, refinery gas, waste oil and solid fuel, fired independently or in combination.

Length : 10 mtr to 60 mtr
Diameter : 1 mtr to 3.6 mtr
Method of heating : Direct
Temperature Range : 900 to 1250 °C
Capacity : 150 Kg/hr to 25 mt/hr
Fuel : Producer Gas, Natural Gas , LDO, Diesel, Biomass, Coal, Charcoal, Lignite, White Coal, Petcoke etc….
  • Make In India; Indigenous Technologies
  • Optimized Power Consumption
  • Air Control System For Air Flow Rate And Velocity Control
  • An Unique Sealing Mechanism
  • Ease To Control Critical Process Parameter
  • Man Machine Interface For Easy Plant Operation
  • Refractory Lining With Suitalbe Alumina Percentage Based On The Process To Be Performed With Kiln
  • Wireless Temperature Measurement, Only Of Its Kind In India In Industrial Mineral Processing Plants
  • Controllable Heat Of Reaction For Product Quality Change.
  • Manual, Semi-Automatic & Fully Automatic Plant
  • Medium Skilled & Mininum Man Power Requirment For Plant Operation
  • Compact Design, Easy Assembly And Disassemble & Maintenance
  • All Extemally Lubricated Bearings
  • Efficient Use Of Energy To Reduces The Calcination Cost
  • Optimized CAPEX & OPEX
  • Fuel for Firing
  • Graphite Electrodes
  • Anodes
  • Metal Industries
  • Brick Industries
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