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AssigneeNone recorded
InventorsJean-Luc Renard, Luigi Borgosano
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The object of the present invention is a refractory pouring tube including a contact face (15) capable of bearing against a contact face (11) of another refractory component (9), the said pouring tube being arranged to be displaced. The said pouring tube is characterised by the fact that its contact face (15) incorporates a cleaning groove (26, 27) delineated notably by a wall presenting an edge capable of exerting a scraping action, as the said pouring tube is displaced, at least partially on the determinate part of the contact face of the other refractory component. The cleaning groove makes it possible to preserve the integrity of the contact surface of the other refractory component and, consequently, the joint surface formed between the two components.
A refractory pouring tube defining a first portion of a pouring channel and comprising a first contact face adapted to be displaced relative to a second contact face of a second refractory component defining an adjacent portion of the pouring channel, whereby displacement comprises sliding the first contact face relative to while maintaining bearing contact against the second contact face and the first and second refractory components define an injection groove substantially encircling the pouring channel and having a determinate part behind the pouring channel relative to the displacement, the first contact face comprises a cleaning groove and a second groove, the cleaning groove presenting an edge adapted to scrape the second contact face as the pouring tube is displaced, the second groove is essentially parallel to the cleaning groove, and the second groove and the cleaning groove are on opposite sides of the pouring channel.
A refractory pouring tube defining a first portion of a pouring channel and comprising a first contact face adapted to be displaced relative to a second contact face of a second refractory component defining an adjacent portion of the pouring channel, whereby displacement comprises sliding the first contact face relative to while maintaining bearing contact against the second contact face and the first and second refractory components define an injection groove substantially encircling the pouring channel and having a determinate part behind the pouring channel relative to the displacement, the first contact face comprises a cleaning groove and a second groove, the cleaning groove presenting an edge adapted to scrape the second contact face as the pouring tube is displaced, the second groove is essentially parallel to the cleaning groove and the second groove and the cleaning groove are symmetrical relative to the pouring channel.
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
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:…
Pouring-nozzles: means for supporting, manipulating or changing a pouring-nozzle
Pouring-nozzles: with gas injecting means
Casting of metals
Term ended 6 Sep 2022 (estimated)
The present invention relates to a grooved refractory component and more particularly to a refractory pouring tube for metallurgical casting, and assembly of refractory components, a casting installation and a process for repairing the contact face of a refractory component.
It is known that the casting of steel calls for the filling of successive metallurgical vessels, notably a ladle, a tundish and ingot moulds, and that during its passage from one upper metallurgical vessel to a lower metallurgical vessel, the metal must as far as possible be kept out of all contact with the ambient air.
To this end, a pouring shroud or a submerged entry nozzle made of refractory material forms an extension to the pouring orifice of the upper vessel (respectively the ladle or tundish), and enters the molten metal present in the lower vessel (respectively the tundish or ingot mould), so that the molten metal passes from the ladle to the tundish or from the tundish to the ingot mould without ever being exposed to the ambient air.
FIG. 1 is an axial cross-section of an inner nozzle of a tundish and a submerged entry nozzle,
FIG. 2 is a view on the underside of the contact face of the inner nozzle,
FIG. 3 is an upper view on the contact face of the submerged entry nozzle,
FIG. 1 shows the bottom wall 1 of a tundish, in a region surrounding one of its pouring orifices 2.
The tundish is fitted with a device 3 for changing the tube 4 which includes a mounting plate 5 integral with the bottom wall of the tundish, guide-rails 6 accommodating the collars 7 of two submerged entry nozzles which are thus held in proximity to the mounting plate 5, and a cylinder 8 to push the two submerged entry nozzles 4 in the guide-rails.
The pouring orifice 2 of the tundish is lined with an inner nozzle 9 made of refractory material, which passes through the mounting plate 5 and bears on the lower face of the latter by means of a flat contact face 11.