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Low Sulphur Low Ash Calcined Coke

Calcined petroleum coke (CPC) is a high-quality carbon material produced from petroleum coke through a process called calcination. Calcination involves heating the petroleum coke to high temperatures to remove impurities and volatile components, resulting in a pure form of carbon with high carbon content. The production process of calcined petroleum coke typically involves the following steps:

Raw Material Preparation: Petroleum coke is the primary raw material used for the production of calcined petroleum coke. It is a carbon-rich solid residue derived from the refining of crude oil. The raw petroleum coke is generally obtained as a byproduct during the distillation process in oil refineries.

Crushing and Grinding: The raw petroleum coke is crushed and ground into a suitable size range to facilitate the calcination process. This step helps to increase the surface area of the coke particles and improve the efficiency of the subsequent heat treatment.

Calcination: The crushed and ground petroleum coke is then subjected to high temperatures in a calciner, which is a large furnace or kiln. The calcination process typically takes place at temperatures ranging from 1200 to 1400 degrees Celsius (2192 to 2552 degrees Fahrenheit) in a controlled oxygen-free or low-oxygen environment. This thermal treatment removes volatile compounds and other impurities, leaving behind a carbonaceous material with high carbon content.

Cooling: After calcination, the hot calcined petroleum coke is cooled down to a manageable temperature. This can be achieved using air or water cooling methods.

Sizing and Packaging: The cooled calcined petroleum coke is then crushed, screened, and sorted into different size fractions according to the specific requirements of customers or end-use applications. The coke can be packaged in bags or bulk containers for transportation and storage.

It's important to note that the production process may vary slightly depending on the specific equipment and technologies used by different manufacturers. Additionally, quality control measures are implemented throughout the production process to ensure the final product meets the required specifications for various applications, such as in the aluminum, steel, and graphite industries.

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The role of the negative material factory

Graphite is a preferred choice for negative electrodes due to its unique properties:

Lithium Intercalation: Graphite has the ability to intercalate lithium ions between its carbon layers during the charging process. This intercalation process allows the graphite to store and release lithium ions reversibly, which is essential for the functioning of lithium-ion batteries.

High Capacity: Graphite exhibits a high theoretical capacity for lithium storage. It can store a significant number of lithium ions per unit mass, thereby enabling the battery to store more energy.

Stable Performance: Graphite is known for its stability and long cycle life. It can withstand repeated lithium intercalation and deintercalation cycles without significant structural degradation, ensuring the durability and reliability of the battery.

Electrical Conductivity: Graphite possesses excellent electrical conductivity, which facilitates the flow of electrons during the charge and discharge processes. This property allows for efficient energy transfer and high power output.

Calcined petroleum coke, on the other hand, is primarily utilized in applications such as aluminum smelting (as discussed earlier) and in the production of carbon anodes for aluminum electrolysis. It is not commonly employed as a negative electrode material in battery systems.

It's important to note that various battery technologies exist, and some may incorporate different materials for negative electrodes. However, in the context of mainstream lithium-ion batteries, graphite remains the predominant material of choice for the negative electrode.