Calcined Petroleum Coke (CPC) 20-40mm: An Overview Calcined Petroleum Coke (CPC) is a high-carbon material derived from the thermal treatment of raw (green) petroleum coke. The calcination process involves heating the raw coke to temperatures between 1200°C and 1400°C in an oxygen-deficient environment, which removes volatile components, moisture, and impurities while increasing carbon purity and crystallinity. CPC with a particle size of 20-40mm is a widely used grade, particularly in industries requiring high carbon content and consistent physical properties. Production Process The production of CPC begins with raw petroleum coke, a byproduct of crude oil refining. After extraction, the green coke undergoes calcination in rotary or shaft kilns, where it is heated to extreme temperatures. This process drives off volatile matter (such as sulfur, nitrogen, and hydrocarbons), reduces electrical resistivity, and enhances density and mechanical strength. The resulting CPC is then crushed and screened to achieve the desired particle size distribution, including the 20-40mm fraction. Key Properties CPC 20-40mm exhibits several critical characteristics: - High Carbon Content (≥98%): Ensures efficient carbon addition in metallurgical applications. - Low Sulfur and Ash Content: Minimizes impurities that could affect end-product quality. - High Electrical Conductivity: Essential for use in aluminum smelting anodes. - Consistent Particle Size: Facilitates uniform mixing and handling in industrial processes. Applications 1. Aluminum Production: The primary use of CPC 20-40mm is in manufacturing carbon anodes for aluminum smelting. Its high purity and conductivity improve electrolytic efficiency. 2. Steel and Foundry Industries: Used as a recarburizer to adjust carbon levels in steelmaking and cast iron production. 3. Titanium Dioxide Production: Serves as a reducing agent in chloride process TiO₂ manufacturing. 4. Other Uses: Includes fuel in cement kilns and graphite electrode production. Advantages - Cost-Effective: Provides a stable carbon source at a lower cost than alternatives like natural graphite. - Thermal Stability: Withstands high temperatures without significant degradation. - Environmental Adaptability: Low moisture and volatile content reduce emissions during industrial use. Quality Considerations Buyers typically evaluate CPC based on: - Sulfur Content: Lower sulfur (<3%) is preferred for environmentally sensitive applications. - Real Density: Higher density (≥2.05 g/cm³) indicates better calcination quality. - Hardness and Abrasion Resistance: Ensures durability during transport and processing. Market and Logistics CPC 20-40mm is traded globally, with demand driven by aluminum and steel industries. Bulk shipping in containers or vessels is common, with precautions taken to prevent moisture absorption and contamination. Conclusion Calcined Petroleum Coke 20-40mm is a versatile, high-performance carbon material essential for energy-intensive industries. Its optimized particle size, purity, and thermal properties make it indispensable for applications requiring reliable carbon supplementation. As industrial processes evolve toward greater efficiency and sustainability, CPC remains a critical raw material in global manufacturing.