Process and equipment for the treatment of loads or residues of non-ferrous metals and their alloys
AssigneesFundacao de Amparo a Pesquisa do Estado do Sao Paulo-Fapesp, Instituto de Pesquisa Technologicas do Est. S. Paulo S/A-IPT
InventorsAntônio Carlos da Cruz, Oskar Wessel Bender
Life of this patent
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Abstract
Equipment for the treatment of loads or residues of non-ferrous metals and their alloys include a rotary furnace having a vessel with a sealed door. An electrode is introduced into the rotary furnace and is used to establish a free burning convective electric arc with the load introduced into the furnace or with the furnaces bottom wall. The equipment is assembled over a hinged base which allows elevating or lowering its rotation axis with respect to a horizontal plane.
Claims14
Equipment for the treatment of loads or residues of non-ferrous metals and their alloys which is a rotary furnace, the rotary furnace comprising:
- a vessel with a sealed door through which is introduced an electrode operative to establish a free burning convective electric arc with the load introduced into the furnace or with a bottom wall of the furnace, the equipment being assembled over a hinged base which allows elevating or lowering its rotation axis with respect to the horizontal plane.
Equipment for the treatment of loads or residues of non-ferrous metals and their alloys which is a rotary furnace comprising a vessel with a sealed door through which is introduced an electrode used to establish a free burning convective electric arc with the load introduced into the furnace or with the furnaces bottom wall, the equipment being assembled over a hinged base which allows elevating or lowering its rotation axis with respect to the horizontal plane;
- wherein the vessel includes a metal shell, internally lined with a refractory material compatible with the processed material and process temperatures;
- and a bottom of the shell is additionally lined with electrically conductive refractory material, which is kept in contact with the metal shell through electrically conductive blocks and with a fixed external electrode through a rolling or contact track, thereby guaranteeing both the electrical contact of the conductive bottom of the vessel and electrical grounding of the furnace framework.
Equipment for the treatment of loads or residues of non-ferrous metals and their alloys which is a rotary furnace comprising a vessel with a sealed door through which is introduced an electrode used to establish a free burning convective electric arc with the load introduced into the furnace or with the furnaces bottom wall, the equipment being assembled over a hinged base which allows elevating or lowering its rotation axis with respect to the horizontal plane;
- wherein the vessel has a lengthwise symmetry axis, or rotation axis, wherein centers of two metal rings are aligned and fixed to the external side of a metal shell and, apart from each other, serve to support the vessel between two pairs of rollers, being one frontal working set and one back safety set;
- a flanged axle at the bottom end of the vessel used to transmit rotating movement to the vessel by means of a driving wheel and to support the vessel over an end bearing.
Dependencies are inferred from the claim text.