Product Code · carbon-electrode-paste

Pasta elettrodica al carbonio (Söderberg)

Electrode Paste

Söderberg electrode paste is a self-baking carbon mix of calcined anthracite, electrically calcined coal, and coke aggregate bound with coal-tar pitch. Charged into the casing of a continuous electrode, it softens at 70-110°C, flows to fill the column, then bakes in situ from furnace heat into a solid conductor. Controlled volatile matter (V.M 12-15.5%) escapes cleanly during that bake; a softening point held in this band prevents green-paste segregation and electrode breaks during slipping. Low resistivity (≤ 75 µΩ·m) and compressive strength ≥ 18 MPa let the column carry high current density and resist soft-tip and hard-break failures. The paste feeds submerged-arc furnaces for ferroalloy smelting (FeSi, FeMn, SiMn, FeCr) and calcium carbide production, where the self-baking electrode eliminates the pre-baked, machined graphite electrode. Fixed carbon ≥ 80% with ash ≤ 8% limits ash carry-over into the bath. Paste is graded standard or sealing/closed-top by V.M and softening point to match electrode diameter and slipping rate. Supplied with COA and MTC, multi-regional sourcing, CIF Marmara or Gebze bonded stock, 20 MT FCL. Send diameter and current rating for a graded RFQ.

Chemical Specifications

Applications

• ▸Submerged-arc furnaces
• ▸Ferroalloy smelting
• ▸Calcium carbide production
• ▸Self-baking electrodes

Supply Terms