Refractory casting nozzle for a changing device arranged at the outlet of a metallurgical vessel

Patent metadata

Field	Value
Publication number	US-12440891-B2
Application number	US-201917756837-A
Country	US
Kind code	B2
Filing date	Dec 4, 2019
Priority date	Dec 4, 2019
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

Refractory casting nozzle for a changing device arranged at the outlet of a metallurgical vessel is provided with a top side refractory plate, which is provided with an abutting surface at each of two opposing end faces. During a change, the casting nozzle can either be moved against the one abutting surface of a top side plate of an adjacent casting nozzle or be pushed out from this casting nozzle. This top side plate is provided, in the one abutting surface, with a centering element protruding on both sides of this and in the opposite abutting surface with a bevelling on both sides, designed such that, during a change, the casting nozzle cooperates, with its centering elements with the bevellings of the adjacent identically designed casting nozzle, thus bringing about a guiding of the two casting nozzles.

First claim

The invention claimed is:

1. A refractory casting nozzle, comprising:
a tubular part;
a top side refractory plate on a top side of the tubular part and which includes front and rear abutting surfaces on opposite front and rear end faces, a first lateral side surface and a second lateral side surface on an opposite side of the top side refractory plate from the first lateral side surface, the front abutting surface having an end region alongside the first lateral side surface and another end region alongside the second lateral side surface and the rear abutting surface having an end region alongside the first lateral side surface and another end region alongside the second lateral side surface;
two centering elements protruding outward from the front abutting surface, each of the two centering elements protruding outward on a respective one of the two end regions of the front abutting surface; and
a sheet jacket on the first and second lateral side surfaces and part of the front and rear abutting surfaces,
the top side refractory plate including two bevellings each on a respective one of the two end regions of the rear abutting surface,
the bevelling and the centering element on the end regions of the front and rear abutting surfaces alongside the first lateral side surface having a cooperating profile and the bevelling and the centering element on the end regions of the front and rear abutting surfaces alongside the second lateral side surface having a cooperating profile,
the sheet jacket having a width between upper and lower surfaces of the top side refractory plate in portions on the front and rear abutting surfaces that is less than a width in portions on the first and second lateral side surfaces, and the front and rear abutting surfaces protrude beyond the sheet jacket and provide contact surfaces of the top side refractory plate adjacent the upper surface of the top side refractory plate.

2. The refractory casting nozzle according to claim 1 , wherein the top side refractory plate has a first corner region between the front abutting surface and the first lateral side surface, a second corner region between the front abutting surface and the second lateral side surface, a third corner region between the rear abutting surface and the first lateral side surface, a fourth corner region between the rear abutting surface and the second lateral side surface, each of the centering elements being in a respective one of the first and second corner regions and each of the bevellings being in a respective one of the third and fourth corner regions.

3. The refractory casting nozzle according to claim 2 , wherein the cooperating profile of the bevelling and the centering element on the end regions of the front and rear abutting surfaces alongside the first lateral side surface and the cooperating profile of the bevelling and the centering element on the end regions of the front and rear abutting surfaces alongside the second lateral side surface is provided by the bevellings having an angle of inclination which is the same as an angle of inclination of a contact surface of the centering elements.

4. The refractory casting nozzle according to claim 3 , wherein the angle of inclination of each of the bevellings and of the contact surfaces of each of the centering elements is between 30° and 60°.

5. The refractory casting nozzle according to claim 3 , wherein the angle of inclination of each of the bevellings and of the contact surfaces of each of the centering elements is 45°.

6. The refractory casting nozzle according to claim 1 , wherein the centering elements are part of the sheet jacket.

7. The refractory casting nozzle according to claim 1 , wherein the centering elements are fixed to the sheet jacket.

8. The refractory casting nozzle according to claim 1 , wherein the bevellings being are surrounded by the sheet jacket.

9. The refractory casting nozzle according to claim 1 , wherein the sheet jacket is a metallic sheet jacket.

10. The refractory casting nozzle according to claim 1 , wherein the top side refractory plate further includes a sliding surface on a top configured for contact with a refractory base plate and wherein an upper edge of the sheet jacket alongside the abutting surfaces is spaced from the sliding surface.

11. The refractory casting nozzle according to claim 1 , wherein the cooperating profile of the bevelling and the centering element on the end regions of the front and rear abutting surfaces alongside the first lateral side surface and the cooperating profile of the bevelling and the centering element on the end regions of the front and rear abutting surfaces alongside the second lateral side surface enables contact between the bevellings on the refractory casting nozzle and centering elements on an additional refractory casting nozzle having the same construction as the refractory casting nozzle and contact between the centering elements on the refractory casting nozzle and bevellings on another additional refractory casting nozzle having the same construction as the refractory casting nozzle.

12. The refractory casting nozzle according to claim 1 , wherein a length of the front abutting surface between the centering elements and a length of the rear abutting surface between the bevellings are greater than a hole diameter of a flow through in a center of the tubular part.

13. The refractory casting nozzle according to claim 1 , wherein the top side refractory plate further includes a sliding surface on a top configured for contact with a refractory base plate and bearing surfaces on a bottom configured for contact with mechanical guiding and lifting push means of a changing device.

14. The refractory casting nozzle according to claim 1 , wherein the angles of inclination of the bevellings are configured such that, during a change by a drive mechanism of a changing device, pushing forces acting upon the refractory casting nozzle are directed toward a center of a flow through of the tubular part.

15. The refractory casting nozzle according to claim 1 , wherein each of the centering elements includes an angled contact surface.

16. In a changing device at the outlet of a metallurgical vessel including mechanical guiding means, lifting push means, a linear actuator with a push rod and a refractory base plate or an inlet nozzle, the improvement comprising:
the refractory casting nozzle of claim 1 being movable by the changing device into a casting position below the refractory base plate or the inlet nozzle and away from the casting position,
the push rod including a U-shaped shoe with guide elements on a front side that are configured to engage the bevellings of the top side refractory plate of the refractory casting nozzle and, when striking the bevellings, exert forces that act in a direction inward into the top side refractory plate.

17. The improvement to the changing device according to claim 16 , wherein the top side refractory plate further includes a sliding surface on a top configured for a sealing contact with the refractory base plate or the inlet nozzle and bearing surfaces on a bottom configured for contact with the mechanical guiding means and lifting push means of the changing device.

Assignees

• Refractory Intellectual Property Gmbh & Co Kg

Inventors

• Freire Rubens Alves
• Silva Fabricio Junior
• Martins Danilo Cunha
• Turqueti Pedrozo Rodrigo Donizete

Classifications

• B22D41/502

  Connection arrangements; Sealing means therefor · CPC title

• B22D41/50

  Pouring-nozzles · CPC title

• B22D41/56 Primary

  Means for supporting, manipulating or changing a pouring-nozzle · CPC title