Patent ID: 6532768
Filing Date: 2003-03-18
Classification: B09B,C03B,F23G

Abstract:
A process for vitrifying a pulverulent material, comprising the steps of:providing a furnace having a fusion zone extending in a horizontal direction, a casting zone provided in the horizontal direction away from where the pulverulent material is introduced into the fusion zone, and a non-transferring arc plasma torch positioned such that a flowing plasma of the non-transferring arc plasma torch depresses a surface of a melt in the fusion zone; introducing the pulverulent material laterally into the fusion zone in the furnace; melting the pulverulent material by the non-transferring arc plasma torch; distorting the surface of the melt with the flowing plasma of the non-transferring are plasma torch such that the surface of the melt is sufficiently depressed and hydrodynamic movements are created in the melt; and removing the melt from the furnace via the casting zone by overflowing.