Powdered Graphitized Petroleum Coke:
Dissolution Rate: With fine particles and a large specific surface area, its contact area with molten steel significantly increases. It can rapidly dissolve and release carbon elements at high temperatures, enabling a quick increase in the carbon content of the molten steel.
Uniformity: The fine particles are prone to diffuse in the molten steel, reducing local enrichment phenomena. This results in a more even distribution of carbon, avoiding variations in steel properties caused by composition segregation.
Oxidation Risk: The large specific surface area also implies more opportunities for contact with oxygen. If the melting environment is not properly controlled, excessive oxidation can easily occur, leading to a decrease in carburizing effectiveness. It is necessary to reduce this risk by optimizing the melting process, such as controlling the furnace atmosphere and stirring intensity.
Lumpy Graphitized Petroleum Coke:
Dissolution Rate: With larger particles and a small specific surface area, its dissolution rate is relatively slow. It requires a longer time to fully contact the molten steel to completely release carbon elements, making it suitable for scenarios where the speed of carbon content increase is not a critical requirement.
Uniformity: The large particles face difficulties in diffusing in the molten steel and are prone to forming local enrichment zones, resulting in uneven carbon distribution. This can be improved by extending the melting time or enhancing stirring.
Operational Convenience: The lumpy form facilitates weighing, handling, and storage. It can reduce losses of powdered materials during transportation and storage, thereby lowering production costs.
Thermal Stability: The large particles exhibit good thermal stability at high temperatures and are less likely to undergo structural changes due to temperature fluctuations, helping to maintain the stability of the melting process.
Post time: Jan-19-2026