Industrial electric heating furnaces inventions 12/08

20080317085 - Lining for carbothermic reduction furnace: An inner lining for the steel shell of a carbothermic reduction furnace for the production of alumina has a base layer of graphite and a coating layer of refractory material. The refractory material is corundum (Al2O3) bound by Sialon (Si.Al.O.N). The lining structure provides protection against the molten slag and... Agent: Lerner Greenberg Stemer LLP

20080304537 - Threaded pin, carbon electrode, and electrode assembly: Carbon electrodes have at least one socket with an internal thread to be mated with a threaded pin having at least one external thread. Also such a threaded pin is provided for connecting to such carbon electrodes. The internal thread or external thread of the carbon electrodes and/or the pins... Agent: Lerner Greenberg Stemer LLP

20080304538 - Safety device for detecting electrode breakage: The invention relates to a safety device (1) for detecting electrode breakage in an electric arc furnace, wherein an electrode (6) is secured on an electrode support arm (4), and wherein a conduit is filled with a medium under a constant pressure and a pressure drop is produced at an... Agent: Abelman, Frayne & Schwab

20080298425 - Method and apparatus for melting metals using both alternating current and direct current: A furnace for melting metals includes a crucible, a direct current arc source and an induction coil powered by alternating current. The furnace is particularly useful for melting charges of highly reactive metals such as titanium, zirconium and their alloys without contaminating these charges. The direct current arc source melts... Agent: Sand & Sebolt