MECHANISM AND METHOD FOR REPLACING THE VALVE OF A CONTINUOUS CASTING MACHINE AND METHOD FOR SEALING THE LEAKAGE HOLE OF THE VALVE REPLACEMENT MECHANISM
Describes a valve replacement mechanism (1) for a continuous casting ma- chine and a method for replacing a continuous casting valve using the valve replacement mechanism, in addition to a method for sealing the leakage hole of the valve replacement mechanism.
B22D 41/22 - Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
B22D 41/24 - Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings characterised by a rectilinearly movable plate
2.
MODULAR REFRACTORY COATING ASSEMBLY FOR TIP OF BURNER
A modular assembly (2) is described for coating with refractory material the tip of a burner which introduces solid or liquid fuel into a rotary kiln for producing cement or lime. The modular assembly comprises at least one module (1.1, 1.2) formed by metal rings (3) provided with anchoring clips (4) covered with a mass of refractory material (2), wherein at least one module (1.1, 1.2) envelops the outer tube of the tip of a burner and is detachably fastened thereto.
One describes a device (2) for injecting gas into an electric arc oven (1), the device (2) being positioned in an opening in the bottom part of the electric arc oven (1). The device (2) of the present invention solves prior-art problems, enabling greater safety against leakage of molten metal and is composed by a seat (3) and a plug (4) inserted concentrically into the seat (3). The plug (4) is provided, in its bottom part opposite the side of the oven, with a connection block (7). The connection block (7) contains a copper nucleus (8). The device (2) further has a sub-plug (16) positioned below the connection block (7), a base plate (15) and a cover (17). The present invention further relates to a method for mounting a gas-injection device (2).
An impact pad for use in tundish of continuous casting steel during pouring out of molten steel (6) from the casting ladle into the tundish. The impact pad (1) has side walls (2) provided with barriers (3) distributed spaced apart and staggered in height and in length in the whole extension of the walls (2) or part thereof, the impact pad (1) still comprises an impact bottom (5) provided with corrugations (4) uniformly distributed and staggered in its entirety or part thereof.
The present invention relates to a cooled lance for injecting into a metallurgical vessel, comprising an internal tube or duct (2), with a gas inlet (5) in the top and gas outlet openings (6) in the bottom of the injection lance (1), and at least one external tube or duct (3) that forms a cooling sheath with the internal tube or duct (2), the internal tube or duct (2) being attached at just one point of the external tube or duct (3) and the gas flows only through the cooling sheath formed between the internal tube or duct (2) and the external tube or duct (3).
The present invention relates to a lance for top injection in metallurgical vessels, which is used essentially for the refining process in pig iron and steel production. The lance (11) has at least one inner tube (13) and a cover of refractory concrete (16), the external profile of the cover of refractory concrete (16) being polygonal. Also described is a method for the production of said lance (11).
The present invention relates to an impact pad for use in tundish of continuous casting steel during pouring out of molten steel (6) from the casting ladle into the tundish. The impact pad (1) has side walls (2) provided with barriers (3) distributed spaced apart and staggered in height and in length in the whole extension of the walls (2) or part thereof, the impact pad (1) still comprises an impact bottom (5) provided with corrugations (4) uniformly distributed and staggered in its entirety or part thereof.
Integral device for immobilizing and changing a submerged entry nozzle in continuous casting tundishes, with the invention combining two different functions in a single device: one use relates to emergency interruption of the flow of molten steel (8) from the tundish to the continuous-casting mould (9); and the other use relates to rapid, safe changing of the submerged entry nozzle (17) on account of wear or for any other problem. The immobilization function is achieved by means of the actuator (25) that moves a safety plate (22) as far as the alignment of the blind area thereof, which is made from refractory material, with the bore of the upper entry nozzle (10). The function of changing the submerged entry nozzle (17) is performed basically by the actuator (14), positioner (19), rack (27), toothed wheels (30) and (31), and articulated support (13), in combination with opening of the guides (16).
A refractory lining process for anode firing furnaces uses refractory mouldings with various shapes, sizes and mutual joints suitable for each site of use in anode firing furnaces (1), with the aim of improving the quality of the lining and rationalising the assembly of the components. Thus, according to the invention, the bottom (10) of the furnace (1) is made of concrete (16) and parallel insulating bricks (17) that define the sill (7) of the anode well (3). The front wall (5) comprises fastening components (18) with a transverse protruding element, components that form the wall (19), a flue tower component (20), as well as the top of the head wall (14) and flue block (11). The duct (4), which is suitably anchored to the head walls (5), is formed by the base (23), the side duct component (21), the locking component (22), the support component (24) and the duct closing component (25), and is completed by the duct top (13). The outer wall (15) is completed by the top (12) of the outer wall. The mouldings comprise typical joints in the form of half-grooves and/or truncated cones, in the tongue-and-groove versions, with an optionally symmetrical shape, depending on the features and function of the components, ensuring the versatility of the assembly.
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