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Calcined Petroleum Coke

Calcined petroleum coke for graphite electrodes manufacturing
Calcined petroleum coke (CPC) is produced when raw coke is calcined. Calcination is the process of heating materials at high temperatures. In this process, remove the moisture content from the raw coke. Calcined petroleum coke appearance is a black or dark gray honeycomb structure, which belongs to the easily graphitizable carbon class. Calcined coke is obtained by calcining raw coke at 1300 .

How to make calcined petroleum coke?

When producing calcined petroleum coke, Add raw coke to the kiln tail in the rotary kiln, spray gas or heavy oil from the nozzle of the kiln head, and mix and burn with air to form a high-temperature calcination zone. The temperature of the calcination zone reaches 1200-1350 ℃.

The high temperature removes moisture and discharges volatile matter, rearranging the coke crystal structure. Then changing the carbon atom grid level, and undergoing chemical changes, resulting in a dense and conductive product. After some time, the calcined petroleum coke is slowly cooled below 200 ℃, and then the calcined petroleum coke can be stored.

Main Features:

Calcined petroleum coke has high carbon content, low ash and sulfur content, and plays an important role in steel production and aluminum smelting production. Because it has excellent thermal conductivity and electrical conductivity at the same time.

In terms of performance, uniform particle size distribution and high carbon content enable efficient combustion and reduce emissions, contributing to environmental sustainability. Our calcined petroleum cokes are low in volatiles and ash, helping to extend equipment life and reduce maintenance costs.

What is calcined petroleum coke used for?

It is mainly used for the prebaked anode and cathode used in electrolytic aluminum, as a carbon raiser in the metallurgical iron and steel industry, and in producing graphite electrodes and carbon products. At the same time, it is used to produce industrial silicon, yellow phosphorus, and ferroalloys. Specification:(size: 0-1mm, 1-3mm, 3-5mm, 5-8mm).

Aluminum Production: it is a critical component in producing anodes used in aluminum smelting. It provides the necessary carbon content and electrical conductivity required for efficient electrolysis.

Steel Production: it is used as a carbon additive in steel production. It helps increase the steel’s carbon content, enhancing its strength and hardness.

Foundry Industry: It is used a carbon additive for cast castings.  Improve the casting quality, reduce casting defects, and promote uniformity in the molten metal.

Graphite Electrode Production: it is a vital ingredient in manufacturing graphite electrodes in electric arc furnaces. Graphite electrodes are essential for the production of steel and other metals.

Carbon Products Manufacturing: it is a raw material in producing carbon products such as carbon brushes, brake pads, and friction materials. Its high carbon content and low impurities make it ideal for such applications.

These are just a few examples of the wide-ranging applications of Calcined Petroleum Coke. Its unique carbon content, low impurities, and desirable physical properties make it valuable in numerous industries, contributing to its efficiency, productivity, and quality.

Conductivity and true density of calcined petroleum coke

After the petroleum coke raw material is calcined, the volatile matter is eliminated, the molecular structure also changes. Then the resistivity decreases, thereby improving the conductivity of the raw material. Generally speaking, the higher the degree of calcination of the raw material, the better the conductivity of the calcined material. The better the quality of the product.

The true density of it is 2.00-2.12g/cm3. The true density can indicate the degree of densification of the structure of it and the degree of crystallite regularization. Therefore, its true density can be used to evaluate the quality of petroleum coke and the quality of the calcination process.

The higher the true density of it at the same temperature, the easier it is to graphitize. This is a physical change during the calcination process.


Fixed Carbon(min) Ash(max) Volatile(Max) Sulphur( Max) MoistureMax
95% 4.5% 1.0 0.25 0.3
94% 5.0% 1.0 0.25 0.3
93% 6.5% 1.2 0.3 0.5
92% 7.0% 1.2 0.3 1.0
91% 8.0% 1.5 0.35 1.0

Package: Waterproof bag 25kg/bag, plus tons of loads.

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