The Production Process Flow Of Graphitized Petroleum Coke Carbon Additive

The production process involves several steps, each of which is crucial to ensuring the highest quality product.

 

Step 1: Petroleum Coke Production

 

The first step in producing graphitized petroleum coke is to produce petroleum coke. Petroleum coke is a byproduct of the oil refining process. The quality of petroleum coke varies depending on the type of crude oil used and the refining process. Low sulfur petroleum coke is preferred for the production of high-quality graphitized petroleum coke.

 

The petroleum coke is processed in a refinery under high temperatures and pressures, resulting in the creation of solid, dense coke particles. The coke is then screened and crushed into a fine powder, which is stored in silos until it is ready for further processing.

 

Step 2: Calcination

 

The next step in the production of graphitized petroleum coke is calcination. Calcination is the process of heating the petroleum coke to high temperatures (usually 1300-1500°C) in an oxygen-free environment. This process removes volatile impurities and moisture, and also causes the coke to shrink and become denser.

 

Calcination is typically carried out in a rotary kiln, which is a cylindrical vessel that rotates around its axis. The rotary kiln is lined with refractory bricks to protect it from the extreme temperatures. The petroleum coke is fed into the kiln through a feed port and is gradually heated as it moves towards the discharge end.

 

Step 3: Graphitization

 

The calcined petroleum coke is then graphitized in a furnace at high temperatures (typically 2500-3000°C). This process converts the amorphous carbon in the coke into a highly ordered crystalline structure, resulting in a highly pure form of carbon with excellent electrical conductivity and thermal conductivity properties.

 

The graphitization process involves three main stages: broken down in the following steps;

 

Step 3.1: Loading the Kiln

 

The graphitization process begins with loading the calcined petroleum coke into the furnace. The coke is loaded into the furnace through a feed port and is spread evenly across the furnace floor using a rake. The furnace is then sealed to prevent air from entering and to maintain an oxygen-free environment.

 

Step 3.2: Heating

 

The furnace is heated to high temperatures using electric heating elements or natural gas burners. The temperature is gradually increased over a period of several hours until it reaches the desired temperature (typically around 3000°C).

 

Step 3.3: Cooling

 

Once the graphitization process is complete, the furnace is allowed to cool slowly to ambient temperature. The graphitized petroleum coke is then removed from the furnace and allowed to cool further before it is processed into its final form.

 

Step 4: Screening and Packaging

 

The final step in the production of graphitized petroleum coke is screening and packaging. The graphitized petroleum coke is screened to remove any oversized or undersized particles, and then packed into bags or bulk containers for shipment to customers.

 

Conclusion:

 

The production of graphitized petroleum coke is a complex process that involves several steps, each of which is crucial to ensuring the highest quality product. The process begins with the production of petroleum coke, which is then calcined and graphitized to create a highly pure form of carbon with excellent electrical conductivity and thermal conductivity properties. The final product is then screened and packaged for shipment to customers. The use of graphitized petroleum coke as a carbon additive has many industrial applications, including steelmaking, foundry casting, and brake pad manufacturing, among others.