Patent ID: 8262985
Filing Date: 2012-09-11
Classification: B65G,C21C,F27B,F27D,Y02P

Abstract:
1. A smelting or reduction furnace ( 2 ) with an open, semiclosed, or closed configuration, to which charge material ( 9 ) in solid form is charged to a furnace chamber ( 15 ) through charging tubes ( 17 ), wherein each charging tube ( 17 ) has a mouthpiece ( 18 ), which is uncooled and consists of an uncooled, wear-resistant inner feed tube ( 19 ) and an uncooled, concentric, heat-resistant outer protective tube ( 20 ), the inner feed tube being concentrically arranged in the outer protective tube, and further comprising a flange fixed to an upper end of the inner tube and to an upper end of the outer protective tube so that the inner tube is fixed relative to the outer tube and the mouthpiece is unitary.