An industrial tunnel oven for heat treatment of parts may include: an outer wall that defines a tunnel; at least one inner wall; and a conveying line, at least partially inside the tunnel, configured to convey the parts along the tunnel. The outer wall may have a substantially cylindrical form above a base zone of the outer wall. The walls may define at least one interspace for hot air entering, leaving, or entering and leaving the oven. The at least one inner wall may extends along sides of the tunnel in an arc so as to define openings for the hot air to flow from the at least one interspace toward the conveying line, from the conveying line toward the at least one interspace, or from the at least one interspace toward the conveying line and from the conveying line toward the at least one interspace.

An industrial tunnel oven for heat treatment of parts may include: an outer wall that defines a tunnel; at least one inner wall; and a conveying line, at least partially inside the tunnel, configured to convey the parts along the tunnel. The outer wall may have a substantially cylindrical form above a base zone of the outer wall. The walls may define at least one interspace for hot air entering, leaving, or entering and leaving the oven. The at least one inner wall may extends along sides of the tunnel in an arc so as to define openings for the hot air to flow from the at least one interspace toward the conveying line, from the conveying line toward the at least one interspace, or from the at least one interspace toward the conveying line and from the conveying line toward the at least one interspace.

A method and plant for thermally treating braking elements after a forming step, including a convective heating step at 150-300 C. and a infrared irradiation heating step, immediately in succession one relative to the other. A tunnel convection furnace is crossed by at least a first conveyor belt which translates along a first direction and on an upper face of which the braking elements are placed, is arranged laterally adjacent, with respect to the first direction, to an infrared heating tunnel furnace crossed by a second conveyor belt which translates along a second direction, parallel and opposite to the first one, and on an upper face of which the braking elements are placed. The first conveyor belt is larger than the second conveyor belt, and the braking elements appear in multiple side-by-side rows in a transverse and oblique direction with respect to the first and second directions. Robots placed at the opposite ends of the furnaces transfer the braking elements from the first conveyor belt to the second one or vice versa to a first end of the furnaces and place them on the first conveyor belt or second one to a second end of the furnaces being opposite to the first one, so as to change at will the sequence in which the infrared and convective heating steps are performed.

Transport system (34) for transporting soldering material through a soldering apparatus (10), comprising at least one transport track (38, 40) extending in the transport direction (18), wherein the transport track (38, 40) comprises at least two transport rails (42, 44, 46, 48), characterized in that a plurality of coupling elements (72, 120) are provided on at least one transport rail (42, 44, 46), in that the coupling elements (72, 120) comprise guide elements (58, 60, 61) which interact with transverse rods (46) which extend in a transverse direction (54) running transversely to the transport direction (18), and in that the coupling elements (72, 120) each comprise a guide part (100) having the respective guide element (58, 60, 61) and a fastening part (102) fastened to the respective transport rail (42, 44, 46) such that the fastening part (102) can be displaced relative to the guide part (100), so that the distance in the transverse direction (54) between the transport rail (42, 44, 46) and the respective guide part (100) changes.

Transport system (34) for transporting soldering material through a soldering apparatus (10), comprising at least one transport track (38, 40) extending in the transport direction (18), wherein the transport track (38, 40) comprises at least two transport rails (42, 44, 46, 48), characterized in that a plurality of coupling elements (72, 120) are provided on at least one transport rail (42, 44, 46), in that the coupling elements (72, 120) comprise guide elements (58, 60, 61) which interact with transverse rods (46) which extend in a transverse direction (54) running transversely to the transport direction (18), and in that the coupling elements (72, 120) each comprise a guide part (100) having the respective guide element (58, 60, 61) and a fastening part (102) fastened to the respective transport rail (42, 44, 46) such that the fastening part (102) can be displaced relative to the guide part (100), so that the distance in the transverse direction (54) between the transport rail (42, 44, 46) and the respective guide part (100) changes.

Equipment and a method for preheating a continuously moving steel strip, in particular before feeding the same into a continuous annealing or hot-dip galvanizing furnace, involves the continuous movement of the steel strip in a preheating chamber including a preheating circuit having at least one preheating tube, the inner surface of which is in contact with externally-recovered burnt gases (e.g. from the furnace). A portion of the outer surface of the preheating tube is disposed directly opposite a surface of the strip in order to provide a first preheating mode by irradiating heat onto the strip and the walls of the chamber, and a second preheating mode, mainly by convection, of a gas constituting a controlled atmosphere in the preheating chamber.

The invention relates to a method and equipment for the continuous sintering of mineral material in a sintering furnace (S). In the method, a material bed (2) is formed on a conveyor base (1), the material bed (2) is conveyed by the conveyor base (1) through the process zones (I-VII) of the sintering furnace that have different temperatures, the zones including at least one drying zone (I), at least one cooling zone (VII), and at least one other process zone (II, III, IV, V, VI) between the said drying zone and cooling zone, and gas is conducted through the conveyor base and the material bed (2), when the material bed travels through the process zones (I-VII), and gas is circulated in a circulation gas duct (3) from the last cooling zone (VII) to the drying zone (I). Part of the gas flow that is conducted to the drying zone (I) in the circulation gas duct (3) is removed as an exhaust gas flow (B) by the exhaust gas blower (5) of an exhaust gas duct (4). The volume flow of the exhaust gas flow (B) is regulated by regulating the blowing power of the blower (5) to control the temperature of the gas flow travelling through the material bed in the drying zone.

A transport system (34) for transporting soldering material through a soldering apparatus (10), includes a transport track (38, 40) extending in a transport direction (18). The transport track includes transport rails (42, 44, 46, 48). Coupling elements (72, 120) are provided on a transport rail (42, 44, 46). The coupling elements include guide elements (58, 60, 61) which interact with transverse rods (46) that extend in a transverse direction (54) relative to the transport direction. Each coupling element includes a guide part (100) having the respective guide element (58, 60, 61) and a fastening part (102) fastened to the respective transport rail such that the fastening part can be displaced relative to the guide part so that the distance in the transverse direction between the transport rail and the respective guide part changes.

A transport system (34) for transporting soldering material through a soldering apparatus (10), includes a transport track (38, 40) extending in a transport direction (18). The transport track includes transport rails (42, 44, 46, 48). Coupling elements (72, 120) are provided on a transport rail (42, 44, 46). The coupling elements include guide elements (58, 60, 61) which interact with transverse rods (46) that extend in a transverse direction (54) relative to the transport direction. Each coupling element includes a guide part (100) having the respective guide element (58, 60, 61) and a fastening part (102) fastened to the respective transport rail such that the fastening part can be displaced relative to the guide part so that the distance in the transverse direction between the transport rail and the respective guide part changes.

The subject of the present invention is a shielding shoe for covering openings in the bottom of a walking beam furnace, the shielding shoe having a semi-circular recess and can thereby be taken up by a vertical support of the walking beam furnace. The shielding shoe consists essentially of refractory cast concrete or refractory rammed concrete and, according to the invention, has a honeycomb-like structure below the shielding jacket. The present invention also relates to a walking beam furnace with such shielding shoes.