Overview
High Temperature Graphitized Carbon Additive is a premium-grade carbon material produced through thermal treatment at 2500-3000°C, which converts amorphous carbon into crystalline graphite structure. This industrial product is essential for precise carbon adjustment in ferrous metallurgy. Unlike standard recarburizers, the graphitization process significantly reduces impurities while improving carbon's crystalline structure, resulting in superior absorption rates (typically 90-95%) compared to non-graphitized alternatives. Its controlled manufacturing ensures consistent performance in demanding metallurgical applications.
Physical and Chemical Properties
The material exhibits high thermal stability with a sublimation point near 3650°C, making it suitable for extreme metallurgical conditions. Its graphitic structure provides excellent conductivity and lubricity properties that benefit molten metal processing. Key quality indicators include fixed carbon content (typically 98-99.5%), sulfur content (<0.05% for premium grades), and nitrogen levels (<300ppm). The particle size distribution (commonly 1-5mm for foundry use) significantly impacts dissolution rates and process efficiency.
Main Applications
Primary use is in electric arc furnace (EAF) and induction furnace steelmaking to achieve precise carbon control in tool steels, stainless steels, and specialty alloys. It's particularly valuable for producing high-carbon steels where low sulfur content is critical. In foundry operations, it improves the quality of ductile and gray iron castings by enhancing graphite nucleation. The material's consistent performance also makes it suitable for ladle furnace treatments and continuous casting processes where predictable carbon recovery is essential.
Safety and Storage
While non-toxic, the fine particulate form requires dust control measures during handling to prevent respiratory exposure. NFPA ratings typically classify the dust as combustible when dispersed in air, necessitating proper grounding during pneumatic transfer. Storage should maintain product dryness (moisture content <0.5%) to prevent oxidation and maintain flow characteristics. Bulk storage silos should incorporate inert gas blanketing for premium grades, while bagged products require palletized storage away from moisture and oxidizing agents.
B2B Procurement Guide
Industrial buyers should specify carbon content (98-99.5% range), sulfur levels (standard <0.3%, premium <0.05%), and particle size distribution based on furnace type and addition method. Larger particle sizes (3-10mm) suit EAF applications, while finer grades (0.5-3mm) work better in induction furnaces. Verify suppliers' graphitization furnace capabilities and quality control processes. Consider ordering trial batches to test absorption rates under your specific operating conditions. For large-volume procurement, negotiate pricing tiers based on annual commitment quantities and explore container-load options to optimize logistics costs.
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