India Carbon Limited

BBD Bag, Kolkata, West Bengal

CPC is used extensively as Anode in Alumina Smelters, as Soderberg's Electrode for Ferroalloy Industries, and in the manufacturing of Graphite Graphite Electrodes, and Thermal Paste for Ferro Alloys & allied industries in Submerged Arc Furnaces.

Raw Coke is Calcined to develop specific properties to make it suitable for industrial purposes. The Calcination (of Raw Coke) involves controlled heating of the Raw Coke to the temperature in the range of 1250C to 1350C. This process drives off moisture, hydrocarbons and other volatile matter present in the Raw Coke is burnt off - thereby densified the particles and changes the electrical properties from insulating to conducting. Raw Coke after Calcination is known as Calcined Petroleum Coke. At India Carbon, Calcination is performed in an oil fired rotary kiln with suitable refractories. Raw Coke crushed into lumps is fed through Conveyor System to the slightly elevated end of the rotary kiln. The coke progresses towards the firing end of the kiln and during it's passage down the kiln any moisture present is driven off by the counter current of hot combustion gasses. Volatile (Hydrocarbon) present in the Raw Coke also evolves and burn as the temperature increases, providing additional heat energy to the calcination process.

We are offering calcined petroleum coke. we bring forth well processed calcined petroleum coke for the clients. High on demand, our calcined petroleum coke is used for melting of steel, recurburisation and for making special steels & alloys in steel industries. The calcined petroleum coke can be availed at the market leading prices from us. properties

• calcined petroleum coke (cpc) is a form of highly electrically conductive, dense carbon with very low specific electrical resistance
• it has fixed carbon of approximately 99.5%

use

• as anode in alumina smelters
• as soderberg's electrode for ferroalloy industries
• for manufacturing of graphite/ graphite electrodes, and thermal paste for ferro alloys & allied industries in submerged arc furnaces.

calcination processraw coke is calcined to develop specific properties to make it suitable for industrial purposes. The calcination (of raw coke) involves controlled heating of the raw coke to the temperature in the range of 1250oc to 1350oc. This process drives off moisture, hydrocarbons and other volatile matter present in the raw coke is burnt off - thereby densified the particles and changes the electrical properties from insulating to conducting. Raw coke after calcination is known as calcined petroleum coke. at india carbon, calcination is performed in an oil fired rotary kiln with suitable refractories. Raw coke crushed into lumps is fed through conveyor system to the slightly elevated end of the rotary kiln. The coke progresses towards the firing end of the kiln and during it's passage down the kiln any moisture present is driven off by the counter current of hot combustion gasses. Volatile (hydrocarbon) present in the raw coke also evolves and burn as the temperature increases, providing additional heat energy to the calcination process. manufacturing processthe burner is regulated only to achieve desired final temperature. When the coke reaches the firing end at the kiln, it drops into a chute and is led into a rotary cooler positioned beneath the kiln. The cooler is equipped with water spray to directly quench and cool the coke. The amount of cooling water is controlled so that the coke does not get wet and remains dry within limit of moisture content. The cooled calcined coke coming out of the cooler, is then routed by the conveyor system to bulk storage and further bagged for shipment to customers.

we are amongst the well reputed manufacturers, exporters and suppliers of electrode carbon paste. The electrode carbon paste is a soderberg paste and there has been a constant increase in their demand in the market. The electrode carbon paste can be availed at market leading prices from us. processed from

• a mix of a specific amount of calcined petroleum coke (cpc) and / or electrically calcined anthracite coal (eca), saturated with selective coal tar pitch binder at a definite temperature.

used in

• submerged arc furnaces for production of various ferro alloys and calcium carbide

manufacturing processthe first step in the manufacture of electrode carbon paste is screening the calcined petroleum coke (cpc) and / or (eca) to different fractions and pulverizing and storing it separately. Following this, pre-determined quantities of different fractions are weighed and transferred to a sigma mixer which is heated to about 150c by thermic fluid. The required quantity of binder is also weighed separately and added to the mixer. the mixing is continued for a pre-determined period known as the mixing cycle. At the end of the mixing cycle, the mixed material is dumped on the mould box and cast into blocks for shipment. quality specificationat the customer's end the paste is fed in the upper part of the electrode. As the paste moves downwards in the electrode it softens and melts forming the shape of the electrode casing. Flowability of carbon paste is essential for proper operation of the electrode. It is important that the paste flows at a reasonable temperature and fills the casing of the electrode, maintaining a consistent mixture of components. The paste then gets baked to a solid mass as it moves down and is capable of passing the required current to the furnace charge. The plasticity of paste, the measure of its flowability is controlled in the mixer by adjusting the binder content or percentage of coke fines. The lower baked part of the electrode is the final electrode product. The physical properties of this paste are of vital importance to ensure proper electrode operation with out breakages. typical characteristics (green paste)volatile matter 15% maxfixed carbon 84% minash 1.0% maxplasticity45 - 55%apparent density1.55 gms/cc minbinder content22 - 24%typical characteristics (baked paste at 1000deg centigrade)apparent density1.35 gms/cc minelectrical resistivity90 ohm-meter maxcompressive strength150 kg/cm2 minporosity35% max

CPC is used extensively as Anode in Alumina Smelters, as Soderberg's Electrode for Ferroalloy Industries, and in the manufacturing of Graphite Graphite Electrodes, and Thermal Paste for Ferro Alloys & allied industries in Submerged Arc Furnaces.