Abstract

A shielding device, and a device for distributing charging material into a furnace or reactor enclosure are disclosed. A charging chute for directing material into the enclosure is movable relative to the enclosure throughout a distribution trajectory, and a housing defines an aperture, the aperture receiving the chute, the chute and the housing defining at least one excursion channel from the enclosure. A chute shielding means comprises a plurality of shielding elements arranged to block the excursion channel such that at any given point in the trajectory of the chute, at least one of said elements spans a portion of the excursion channel.

IPC Classes  ?

• C21B 7/20 - Bell-and-hopper arrangements with appliances for distributing the burden
• F27D 3/10 - Charging directly from hoppers or shoots
• F27D 99/00 - Subject matter not provided for in other groups of this subclass
• F27B 1/20 - Arrangement of devices for charging

Abstract

Apparatus for descaling metal in plate mills, particularly metal ingots of varying thickness. Two headers (1,2) bearing spray nozzles (17) are arranged above the metal with a mutual offset such that the sprays from the first header (1) are centered on different regions of the metal than are the sprays on the second header (2). The regions sprayed by the first header (1) overlap with those sprayed by the second header (2), the degree of overlap depending on the metal thickness and hence stand off distance of the nozzles.

IPC Classes  ?

• B21B 45/08 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling hydraulically

Abstract

A fully hydraulic edging system suitable for use in wide plate mills is disclosed. The need for electro-mechanical screws to effect large movements of the side rollers (2) is avoided by employing a pull-back hydraulic cylinder (10) for this purpose. The main hydraulic cylinders (12) are switched to a non-operational mode during large movements thus avoiding the need for large volumes of hydraulic fluid to be transferred under high pressure.

IPC Classes  ?

• B21B 13/06 - Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged vertically
• B21B 31/32 - Adjusting rolls by moving rolls perpendicularly to roll axis by liquid pressure

Abstract

The disclosed invention is a new concept for controlling the flatness of the strip during the rolling of aluminium strip or foil (2). The system consists of a full width bank of cryogenic roll cooling devices (7) acting on the roll (s) (4) and a full width bank of roll heating devices (8) also acting on the roll(s). Both or either of the cooling and heating banks are divided into individually controllable zones. A process automation system controls the action of the cooling and heating banks via feedback from a strip shape meter (9) and / or a predictive process model, in order, by thermal growth / contraction, to create the best roll profile for rolling flat strip.

IPC Classes  ?

• B21B 3/00 - Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences
• B21B 27/10 - Lubricating, cooling, or heating rolls externally
• B21B 37/32 - Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls

Abstract

An electrostatic discharge nozzle is described having two concentrically arranged cylindrical portions (2, 3). At least one of the portions (2, 3) has radial thickness that decreases along its axial length to a minimum value near the discharge end. This arrangement provides for an enhanced electric field at the point of discharge giving rise to an improved, fined spray pattern.

IPC Classes  ?

• B05B 7/06 - Spray pistolsApparatus for discharge with one outlet orifice surrounding another approximately in the same plane

Abstract

Rolling cut metal shearing apparatus is described in which the starting and, or end position of a shear blade (2) is varied according to the width, position and thickness of material to be cut (1), thereby optimising the stroke of the blade (2) for the material dimensions. This provides for shorter cutting times, reduced volumes of hydraulic fluid and increased throughput.

IPC Classes  ?

• B23D 15/14 - Shearing machines or shearing devices cutting by blades which move parallel to each other characterised by drives or gearings therefor actuated by fluid or gas pressure
• B23D 36/00 - Control arrangements specially adapted for machines for shearing or similar cutting, or for sawing, stock while the latter is travelling otherwise than in the direction of the cut

Abstract

A metal shearing apparatus is described in which the fixed side link, normally used to control lateral movement of the upper blade assembly, is replaced with an adjustable side link (9). The length adjustable side link (9) is variable during the cutting action, allowing for an improved rolling action with minimal slippage. The adjustable side link (9) may be implemented as a hydraulic cylinder.

IPC Classes  ?

• B23D 15/08 - Sheet shears with a blade moved in one plane, e.g. perpendicular to the surface of the sheet
• B23D 15/12 - Shearing machines or shearing devices cutting by blades which move parallel to each other characterised by drives or gearings therefor
• B23D 15/14 - Shearing machines or shearing devices cutting by blades which move parallel to each other characterised by drives or gearings therefor actuated by fluid or gas pressure

Abstract

A metal shearing method and apparatus is described in which the cutting cycle includes a cut in two directions (e.g. left to right and then righ to left) rather than the conventional cut in one direction fallowed by a reset of the shear blade (2) t a startinf position ready for the next cut, This gives rise to increased throughput and reduced volumes of hydraulic fluid.

IPC Classes  ?

• B23D 15/12 - Shearing machines or shearing devices cutting by blades which move parallel to each other characterised by drives or gearings therefor

Abstract

A metal shearing machine is disclosed wherein a piston (8) has a valve (11) and conduits (12) embedded therein so that when the piston (8) moves within a cylinder in a non-operating mode (for example when the piston (8) follows the movement of a component being driven by other means) the valve (11) can be opened to allow hydraulic fluid to pass from one side of the valve to the other. Location of the valve (11) within the piston (8) eliminates the need for external fluid connections to the cylinder.

IPC Classes  ?

• B23D 15/14 - Shearing machines or shearing devices cutting by blades which move parallel to each other characterised by drives or gearings therefor actuated by fluid or gas pressure

Abstract

The invention relates to a method and an apparatus for controlled cooling of hot rolled metal (1) using zone separation spray devices (10,11,12) which are adjustable as a function of the cooling flow (5,8) applied.

IPC Classes  ?

• B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
• C21D 9/52 - Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for wiresHeat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articlesFurnaces therefor for strips
• B21B 37/76 - Cooling control on the run-out table

Abstract

A conduit for charging a blast furnace comprises a conduit comprising one or more frusto-conical sections for directing charging material into the furnace and employs a 'ski jump' type feature on the chute to provide for an improved trajectory of charging material after it leaves the conduit. The conduit is m ounted on a gimbal or other universal type joint which allows direction of the conduit to different areas within the blast furnace without rotation.

IPC Classes  ?

• C21B 7/20 - Bell-and-hopper arrangements with appliances for distributing the burden
• F27B 1/20 - Arrangement of devices for charging
• F27D 3/10 - Charging directly from hoppers or shoots
• F27D 3/00 - ChargingDischargingManipulation of charge

Abstract

A method, and an apparatus, for operating a hydraulic shearing machine are provided comprising for cutting a shearing-movement of at least one shear blade (17) which is curved, starting from a starting-position under application of an overall actuating-force and for resetting of the shear blades which were moved for cutting to their starting-position after accomplishment of the shearing-movement a reset-movement under application of an overall reset-force, the shearing-movement and the reset-movement being accomplished by a hydraulic actuating-mechanism comprising hydraulic cylinders (21, 22, 23, 24) and the overall actuating-force and the overall reset-force being applied to the moved shear blades by at least one hydraulic cylinder of the actuating-mechanism. The magnitude of the overall actuating-force is adjustable by switching one or several hydraulic cylinders of the actuating-mechanism in and out of operation-mode. The method proposes that the position of the curved shear blade are controlled by a control system by regulating the flow of hydraulic fluid to the hydraulic cylinders according to setpoints for a shear blade position versus time function and the overall actuating-force and overall reset- force requirements.

IPC Classes  ?

• B23D 15/14 - Shearing machines or shearing devices cutting by blades which move parallel to each other characterised by drives or gearings therefor actuated by fluid or gas pressure
• B26D 5/12 - Fluid-pressure means

Abstract

Apparatus for coiling a strip-shaped material with at least one ironing roll (10) which is carried by at least one pivoted lever (11) of constant length that is pivotable about the swivel axis of an adjustable pivot point, and with a deflection roller device for monitoring the strip-shaped material's shape which comprises a shape meter roll (3) and a tucking roll (4), the tucking roll (4) being at least vertically adjustable and fixable in at least two tucking roll positions. The adjustable pivot point is fixable in at least two pivot point positions, which are positioned in such a way that for each tucking roll position there exists a pivot point position in which, throughout coiling, the distance between the ironing roll's contact point with the coil and the strip-shaped material's tangent point onto the coil (7) is maintained at the optimum working distance within a tolerance of ±5 mm.

IPC Classes  ?

• B21C 47/06 - Winding-up or coiling on or in reels or drums, without using a moving guide with loaded rollers, bolts, or equivalent means holding the material on the reel or drum
• B65H 18/26 - Mechanisms for controlling contact pressure on winding-web package, e.g. for regulating the quantity of air between web layers

Abstract

A cyclone is provided which combines a classi fier inlet, which provides at least partial separation of particles according to size, with a by-pass arrangement which diverts selected particles to a cyclone discharge duct. The invention has particular utility in the collection of particles from blast furnace waste gasses.

IPC Classes  ?

• B04C 5/04 - Tangential inlets
• B04C 5/13 - Construction of the overflow ducting, e.g. diffusing or spiral exits formed as a vortex finder and extending into the vortex chamberDischarge from vortex finder otherwise than at the top of the cycloneDevices for controlling the overflow

Abstract

Method for thermo-mechanical controlled rolling of metal slabs to plates or strips, in which for two successively rolled slabs the time gap between the starts of their rolling phases 1 is always smaller than the sum of the duration of all rolling phases and all cooling phases of the rolling pattern, and in which during rolling the batch it occurs on at least one rolling mill stand several times that a rolling phase applied to one slab or plate or strip is succeeded by a different rolling phase applied on another slab or plate or strip. In the apparatus for thermo-mechanical rolling according to that method the number of storage positions is half the interleave depth of the performed rolling pattern rounded up to an integer.

IPC Classes  ?

• B21B 39/00 - Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips

Abstract

The invention relates to the field of controlled cooling of hot plate or strip shaped metal. An apparatus for the controlled cooling and a control method is proposed. The apparatus comprises a header fitted with a first valve (7), whereas the valves (7) allows air to escape from the header and prevent cooling fluid to escape from the header (1) when being filled and prevent air from getting back into the header. During operation due to the apparatus an improved operation even at low flow rates is possible.

IPC Classes  ?

• B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning

Abstract

The invention relates to the design of multiple piece rolls, in particular backup rolls, for the use in metal rolling. The roll comprises a main part (1) with a centre bore (4) for the removal of centre defects or flaws arising from the manufacturing process, e.g. from casting or forging and at least an end part (2, 3), whereas the end part (2, 3) has no centre bore or a centre bore (5) with a diameter smaller than the bore diameter of the main part (1).

IPC Classes  ?

• B21B 27/02 - Shape or construction of rolls
• B21J 5/00 - Methods for forging, hammering, or pressingSpecial equipment or accessories therefor
• B21K 1/10 - Making machine elements axles or shafts of cylindrical form

Abstract

The invention relates to a roll bending device for the control of profile and flatness in the rolling of metal plates or strips. In particular the invention relates to the well known principle of roll bending by using hydraulic cylinders to modify the load distribution between rolls of a rolling mill stand and a rolled stock e.g. a metal plate or a strip in order to control the profile and flatness of the metal plate or strip. A special design to allow safe roll bending even at large roll gauges is presented. The new design allows safe operation even at large roll gauges and high side loads.

IPC Classes  ?

• B21B 29/00 - Counter-pressure devices acting on rolls to inhibit deflection of same under load, e.g. backing rolls

Abstract

The invention relates to a method for slag granulation, whereby molten slag is converted to slag sand by water jets, the slag sand is drained in a draining plant (4) by drawing off coarse slag sand using at least one conveying screw (4a) that is mounted at an angle in a first sedimentation basin (4c) and feeding overflow water from the first sedimentation basin (4c) to a second sedimentation basin (5), and returning the overflow water to the slag granulation process. The invention also relates to a corresponding device. The invention is characterized in that fine slag sand is sedimented in the second sedimentation basin (5) and the sedimented fine slag sand is directly supplied to the draining area of the conveying screw (4a) of the first sedimentation basin (4c).

IPC Classes  ?

• C21B 3/06 - Treatment of liquid slag
• C04B 5/02 - GranulatingDehydratingDrying