ELECTRIC ARC FURNACE FOR CONTINUOUS MELTING OF DIRECTLY REDUCED IRON OR DIRECTLY REDUCED IRON ORE

摘要

1497967 Continuous tilting electric arc furnaces NATIONAL RESEARCH INSTITUTE FOR METALS SCIENCE & TECHNOLOGY AGENCY 16 March 1976 [17 March 1975 (4)] 10485/76 Heading F4B An oscillatable electric arc furnace for continuously melting directly reduced iron or iron ore comprises fixedly mounted electrodes 2 and a furnace body which oscillates about a vertical axis so that the molten material moves relative to the arc spots of the electrode tips to repeatedly alter their relative positions and achieve uniform heat distribution. The travel of a projecting tapping port 5 on the furnace body which has an adjacent lower tundish 6, being equal to or less than the maximum travel of the arc spots and melt. As shown the furnace body wall 1 is formed from two arcs of different radii of curvature and oscillates through an angle of 90 degrees. In a first modification (Fig. 2) the body is of rectangular or elliptical shape in horizontal section and is oscillatory along its major axis. In a further form (Fig. 3) the body is of annular shape formed by concentric inner and outer walls which oscillate about a vertical axis, the tapping port projecting inwardly from the inner wall. In a final embodiment, (Fig. 4) the body is an inverted rectangular pyramidal form oscillatable about a vertical axis through the apex.