Continuous annealing equipment (1) including a cleaning device (11, 12) for performing a cleaning treatment on a steel strip (S) and an annealing device (12) for performing an annealing treatment on the steel strip (S) comprises an exhaust gas passage (31, 41) through which an exhaust gas discharged from the annealing device (12) flows, a solution circulation passage (32, 51) through which a cleaning solution used in the cleaning device (11, 12) circulates, and a heat exchanger (53) which forms a part of the solution circulation passage (32, 51) and contacts with the exhaust gas.

A hood for a taphole and a tapping spout in a submerged arc furnace in the production of silicon. The hood has at least two suction ducts which are placed asymmetrically on either side of the hood, and is useful in a process for the production of silicon in a submerged arc furnace, wherein liquid silicon and refining gas escape from a taphole of a crucible, wherein the liquid silicon flows on a tapping spout into a ladle, wherein the refining gas is sucked in a hood which has at least two suction ducts which are placed on either side of the hood.

An apparatus to move and preheat metal material (M) to be fed to a container comprises a containing structure, having an internal compartment and provided with a support wall, a conveyor for the material (M), a fume transit section whose volume reduces as it is distanced from said container along the longitudinal development of said containing structure, and a collector for hot fumes (F) whose volume increases in a manner correlated to said reduction in the fume transit section. The collector is located below said conveyor inside the internal compartment essentially along the entire longitudinal development of said containing structure. Moreover, one or more through apertures are made in said support wall to put the conveyor and the collector into fluidic connection.

An apparatus is disclosed for a metallurgical furnace having a roof with an integrated off-gas hood. The roof has a hollow metal roof section. The hollow metal roof section has a top and a bottom surface. The hollow metal roof section has a center opening configured for one or more electrodes to pass therethrough. An enclosed space is disposed between the top and the bottom surface. A spray-cooled system is disposed in the enclosed space and configured to spray-coolant on the bottom surface of the roof. The integrated off-gas hood has an inlet open to the center opening. The spray-cooled system is also configured to cool the integrated off-gas hood.

A molten metal rotor receives and retains an end of a molten metal rotor shaft. The rotor shaft has one or more projections at the end received in the rotor. The rotor has an inner cavity, a top surface with an opening leading to the inner cavity, and at least one abutment. The opening includes one or more portions for allowing each projection to pass through the opening and into the inner cavity. The rotor and/or shaft are then rotated so at least one of the outwardly-extending projections is under the top surface of the rotor and is against an abutment. A molten metal pump, rotary degasser scrap melter or other device used in molten metal may utilize a rotor/shaft combination as disclosed herein.

Disclosed is a high-temperature flue gas recovery apparatus for a melting furnace, which relates to copper production, including a preheating chamber and a feeding mechanism, a lower end of the preheating chamber being in communication with a feeding port of the melting furnace, the feeding mechanism being disposed above the preheating chamber to deliver feedstock into the preheating chamber, a plurality of layers of buffer mechanisms layered in an upper-lower manner being provided in the preheating chamber, each layer of the buffer mechanism including a buffer element and a drive element, the drive element driving the corresponding buffer element to move such that the feedstock on the buffer element of an upper-layer buffer mechanism falls onto the buffer element of a lower-layer buffer mechanism, a gap allowing a gas to pass through being provided between the buffer mechanisms and an inner wall of the preheating chamber. The solution may recover the high-temperature flue gas produced by the melting furnace to preheat the feedstock, thereby enhancing the energy utilization ratio during the production process; moreover, with the plurality of buffer mechanisms, the solution may charge the feedstock into the melting furnace in small quantity per time and in multiple times, facilitating accurate control of the feeding rate and amount of the feedstock.

The disclosure relates to a process for the production of sponge iron from iron ore that includes the steps: charging iron ore into a direct reduction shaft; introducing a hydrogen-rich reducing gas into the direct reduction shaft in order to reduce the iron ore and produce sponge iron; removing a top gas from the direct reduction shaft; dividing the top gas into a recycle stream and a bleed-off stream; processing the bleed-off stream through a separation unit to provide a hydrogen-enriched off-stream and an inert-enriched off-stream; and introducing the recycle stream and the hydrogen-enriched off-stream as constituent parts of the hydrogen-rich reducing gas to the direct reduction shaft. The disclosure further relates to a system for the production of sponge iron.

A method for venting a spray-cooled roof of a ladle metallurgical furnace is provided herein. The method begins by processing molten metal materials in a ladle metallurgical furnace having a spray-cooled roof with an opening configured for one or more electrodes to pass there through and an integrated hood. Process gases and fumes are extracted through a channel having walls disposed within an enclosed space of the spray-cooled roof. The walls of the channel are cooled with a spray-cool system extends between the walls of the channel and a top of the spray-cooled roof.

The invention provides device for diversion of quenching exhaust gas and diversion method, exhaust gas chamber is located at top of quenching chamber; quenching chamber is fixedly connected to exhaust gas chamber through partition; support plate in lifting assembly is fixedly connected to side of partition, motor in exhaust assembly is fixedly connected to slider in lifting assembly, two adjacent sides of quenching chamber are fixedly connected to lower surface of support plate through triangular support frame; sealing brushes are located on two adjacent sides of exhaust chamber, gas detector is located inside exhaust chamber on one side near the top, exhaust cylinder is located at center of upper surface of top of exhaust chamber, first end of slider support column and motor support seat are respectively located on upper surface of support plate, second end is fixedly connected with lower surface of baffle through cylindrical hole of slider.

A coupling has an opening and a protrusion extending downward from the opening. The protrusion has threads that are preferably positioned outside of the opening. A rotor shaft that connects to the coupling has an internal bore with threads that receives and retains the protrusion, such as by a threaded connection between the two, so the protrusion applies driving force to the shaft.