Graphite electrode scrap

When purchasing graphite electrode scrap, the most critical factor is the Fixed Carbon content, which should ideally be above 98% or 99% for high-quality applications. You must also verify the Sulphur content (typically <0.05%) and Ash content (<0.5%), as these impurities directly affect the quality of steel or aluminum during the recarburization process. Additionally, specify the particle size distribution (e.g., 0-10mm, 50-100mm, or whole broken pieces) to ensure compatibility with your furnace charging system.

The choice depends on whether the scrap is used as a recarburizer in steelmaking, an additive in foundry casting, or for producing carbon paste. For Electric Arc Furnaces (EAF), high-density scrap from UHP (Ultra High Power) electrodes is preferred due to its superior electrical conductivity and thermal shock resistance. If the goal is cost-reduction in basic iron casting, lower-grade HP (High Power) or RP (Regular Power) scrap may be economically feasible.

Buyers should request a Chemical Composition Analysis Report and a Particle Size Test Report from the supplier. Ensure the supplier adheres to ISO 9001 quality management systems. For international trade, verify if the material is classified as 'waste' or 'secondary raw material' under the destination country's environmental regulations to avoid customs clearance issues related to solid waste import bans.

Request third-party inspections (such as SGS or Intertek) before shipment to verify that the scrap is free from visible impurities like wood, stones, or metal wires. Since graphite scrap is often a byproduct of electrode machining or breakage, ensure the supplier has a magnetic separation process in place to remove any metallic contaminants that could alter the chemical balance of your melt.

The biggest risk is quality inconsistency between the sample and the bulk cargo. Because scrap is non-standardized, some suppliers may mix in calcined petroleum coke or lower-grade carbon to reduce costs. To mitigate this, use Trade Assurance services on Made-in-China.com and insist on pre-shipment sampling from the actual batch being loaded.

Pricing for graphite scrap is highly sensitive to the global needle coke market and steel industry demand. Negotiate based on Fixed Carbon tiers; for example, a price adjustment clause if the carbon content falls below the agreed percentage. For logistics, FOB (Free On Board) is often preferred for large bulk shipments to allow the buyer to control ocean freight costs and insurance.

Graphite scrap is typically shipped in 1-ton jumbo bags or in bulk containers. Ensure the bags are UV-resistant and moisture-proof to prevent degradation during sea transit. For fine-grained scrap (graphite powder/fines), ensure the packaging is leak-proof to comply with international maritime safety standards regarding dust explosion risks and cargo cleanliness.

Prioritize Audited Suppliers who have undergone on-site verification by independent inspection companies. Check their export history and specifically look for their production capacity—a genuine manufacturer or large-scale processor is more reliable than a small trader when it comes to maintaining long-term chemical consistency of the scrap.