PROCEDIMENTO ED APPARECCHIATURA PER RENDERE LIQUIDI MATERIALI TERMOFUSIBILI MEDIANTE UNA CORRENTE DI PLASMA PARTICOLARMENTE PER PORTARE ALLO STATO LIQUIDO MATERIALI IN POLVERE UTILIZZATI NELL INDUSTRIA VETRARIA

摘要

Converting thermally meltable materials to a liquefied state is carried out by a plasma heat source encircled by a layer of the unmelted material. As liquefied material is drained from the surface, additional unmelted material is fed onto the surface to maintain a substantially constant layer of the unmelted material, thereby maintaining the temperature of the melting vessel relatively low and eliminating the need for forced cooling of the vessel.