Graphite electrodes

Graphite electrodes are intended for arc furnaces, ladl furnaces and melting furnaces for manufacturing ferroalloys, magnesite and corundum.

Quality

RP, RP 2x, HP, SHP, UHP

Dimension range

152 mm – 610 mm

Services

  • Just-in-time deliveries from a warehouse in the CR
  • 100% control of electrode and nipple inner parameters including non-destructive bending strength measurement
  • 100% control of electrodes and nipple connections
  • Impregnation using antioxidant
  • Repairs of damaged electrodes
  • Optimisation of electrode consumption

In 2012, a new CNC machining centre was installed for machining threads into graphite electrodes. In connection with this significant investment, a marked change to the whole technology-production process has been implemented.

Currently, the Company buys the initial graphite cylinder blanks from verified manufacturers. The cylinders are additionally provided with anti-oxidant impregnation as necessary. Impregnated and non-impregnated graphite cylinders are subject to further high-precision machining on the automatic CNC line.

Nipples are checked at a special workstation; resistance and bending strength limits are measured.

A checked nipple is mounted to each electrode at the output from the CNC line and the tolerance is checked.

The parameters of the assembled graphite electrode are subsequently verified on a semi-automatic linewhere its diameters, resistance, bending strength and density are checked.

This whole process takes place within ISO 9001:2008 certification and significantly enhances the reliability of our product.

CNC machining centre

Examples of graphite electrodes application