Protective Coating von Graphitelektroden

Reducing the specific graphite consumption is one major issue for electric steel plants and can be achieved in several ways, particularly by protecting the electrode surface from oxidation or at least delaying the start of the oxidation process. For more than 40 years, the most efficient technique applied in electric steel production is the special Graphite Cova protective coating for graphite electrodes. All over the world, Graphite Cova is the only producer of this type of coating which is used in metallurgy (electric steel production) as well as in the production of non-metal and mineral products by electric arc treatment (mineral wool, corund, silicium, etc.). The production of protective coating is a high-tech process made on machines designed especially for this purpose. On EAFs, where water spray cooling is applied for reducing the specific graphite consumption, a further reduction of 10 to 15% can be achieved by using coated electrodes. On LFs, however, the specific graphite consumption can be reduced by up to 30% by using coated electrodes (depending on the operation conditions of the furnace). The Graphite Cova coating process has been improved continuously during the last 20 years and is available today in two main types: “white coating” and “black coating”. The latest patent for the technological development of coating dates from the year 2000. CONTACT: Mr. Riju Chatterjee e-mail: chatterjee@graphitecova.com Phone: +49 911 5708305 Mobile: : +49 176 1 5708 202 / +49 155 1 0556 253 E-Mail: chatterjee@graphitecova.com