A magnetic bearing device comprise: a support unit which is disposed to be adjacent to a roll shaft and forms a magnetic field toward the roll shaft; and a magnetic force receiving unit which is coupled to the roll shaft and only a part of which faces the support unit is made of a magnetic body, wherein the magnetic force receiving unit magnetizes by mean of a magnetic force.

A roller may be used to deflect or guide a metal strip to be coated in a metal melt bath. The roller may comprise a steel roller shell and steel bearing journals that are connected to the roller shell and arranged coaxially to each other for a rotary supporting of the roller. Disposed on each bearing journal may be a substantially cylindrical or circular disk-shaped connection portion that is made of steel and that extends radially in a direction of the roller shell. At least one of the connection portions may have at least one through opening that emerges at an end face of the roller shell. Further, a filling made of one or more filling elements that have at least one closed cavity may be arranged in the roller shell. The filling may have a structure that is symmetrical about an axis of rotation of the roller.

The invention relates to a device and a method for hot-dip coating a metal strip with a metal covering, wherein the metal strip is directed continuously through a melt bath, wherein the thickness of the metal covering present on the metal strip when it leaves the melt bath is adjusted by means of a scraping device, and wherein slag which is present on the melt bath is driven away from the metal strip leaving the melt bath by means of a gas flow. To prevent slag from coming into contact with the metal strip leaving the melt bath, the invention drives away the slag from the metal strip by means of at least one nozzle which is arranged in close proximity to the metal strip, that a gas flow which extends over the width of the metal strip is directed onto the surface of the melt bath.

At least one bearing insert is secured within a metallic housing to form a wear resistant bearing. In operation, the bearing insert engages a journal and provides a wear-resistant surface. The housing defines a cavity for receiving the bearing insert. The cavity preferably expands radially so that the bearing insert remains secured in the cavity. The bearing insert can comprise a refractory ceramic. The bearing insert is secured within the cavity by any suitable means, such as thermal shrink-fit. A thin layer of sacrificial metal protects the bearing insert during initial start-up. The sacrificial metal wears to expose the bearing insert. Further wear exposes a larger area of the refractory bearing insert. A second bearing insert can be disposed opposite to the first so that rotating the housing can expose the second bearing insert to the journal.

A device minimizes or eliminates surface flaws caused by metal dust on a metal strip to be coated in a continuous hot-dip coating process, where at least some segments of the metal strip to be coated are conveyed through the device in an axial direction. The device may comprise a blowing/sucking unit with blow-in openings for applying protective gas to the metal strip, which blow-in openings are positionable on first and second sides of the metal strip. The blowing/sucking unit may further include suction openings for extracting protective gas laden with metal vapor and/or metal dust, which suction openings are positionable on the first and second sides of the metal strip. The blowing/sucking unit may have a blow-in region in which the blow-in openings are arranged, and a suction region downstream of the blow-in region in which the suction openings are arranged.

The invention relates to a device for processing a metal strip (200) after said metal strip has exited a coating tank (300) having liquid coating material (310). Above the coating tank, the device has a blow-off apparatus (110) having an air outlet slot (112) for blowing liquid parts of the coating off of the metal strip. Arranged above the blow-off apparatus (110) is an electromagnetic stabilization apparatus (140) for stabilizing the metal strip by means of electromagnetic forces after the exiting of the coating tank and the blow-off apparatus. According to the invention, in order to design known devices for treating a metal strip to be more favorable in respect of energy and in order to increase the accessibility of said devices for an operating person, the stabilization apparatus (140) is arranged above the blow-off apparatus (110) in such a way that the distance d between the line of action of the maximum force of the stabilization apparatus on the metal strip and on the air outlet gap (112) of the blow-off apparatus (110) is limited to a range of 100-1200 mm.

An electromagnetic device (1) for stabilizing and minimizing the deformation of a strip (4) made of ferromagnetic material during its feeding in a system for coating the same strip with molten metal, by applying a distribution of force which is continuous in the direction transversal to the strip regardless of the width thereof. The device comprises first electromagnets and second electromagnets mirroring the tirst electromagnets with respect to said theoretical pass-line (50) of said strip (4). Each electromagnet includes a core comprising one pole and one feeding coil wound about the pole. The electromagnetic device comprises a connection element (26) made of ferromagnetic material which connects the cores of the first electromagnets (15, 15, 15, 15) and a connection element (26) made of ferromagnetic material which connects the cores of the second electromagnets (16, 16, 16, 16). The connection elements (26, 26) mirror the theoretical pass-line (50) of the strip (4).

A hot-dip plating apparatus for plating a thin molten solder film can control a film thickness of a molten solder on a base material evenly and in increments of a few m and achieve a thin-film solder plating having a film thickness less than a conventional system. As shown in FIG. 1, this apparatus comprises a solder bath 17 of accommodating the molten solder 7; a second conveying section 23 for drawing up a strip member 31 from the solder bath; and a blower section 19 for blowing hot gas on the strip member 31 immediately after being drawn up from the solder bath by a second conveying section 23; the hot gas having a predetermined flow volume and a predetermined temperature equal to or higher than a melting temperature of the molten solder 7. According to this configuration, the excess molten solder 7 can be trimmed from the strip member 31 corresponding to composition of the molten solder 7. Thus, the film thickness of the molten solder 7 coated on the strip member 31 can be controlled evenly and in increments of a few m.

A continuous hot-dip metal coating method that can reduce both non-coating caused by metal vapor generated in a snout and non-coating caused by an oxide film on a molten metal bath surface in the snout and stably and promptly change the oxidizability of the atmosphere in the snout is provided. In a continuous hot-dip metal coating method, oxidizing gas is supplied into a snout 14, a temperature of an inner wall surface of the snout is maintained at 150 C. or less below a temperature of the molten metal bath, and an atmospheric temperature of an upper portion in the snout is maintained at 100 C. or less below the temperature of the molten metal bath.

An electromagnetic device (1) for stabilizing and minimizing the deformation of a strip (4) made of ferromagnetic material during its feeding in a system for coating the same strip with molten metal, by applying a distribution of force Which is continuous in the direction transversal to the strip regardless of the width thereof. The device comprises first electromagnets and second electromagnets mirroring the first electromagnets with respect to said theoretical pass-line (50) of said strip (4). Each electromagnet includes a core comprising one pole and one feeding coil wound about the pole. The electromagnetic device comprises a connection element (26) made of ferromagnetic material which connects the cores of the first electromagnets (15, 15, 15, 15) and a connection element (26) made of ferromagnetic material which connects the cores of the second electromagnets (16, 16, 16, 16). The connection elements (26, 26) mirror the theoretical pass-line (50) of the strip (4).