JPH0715152U - Nozzle receiving refractory assembly - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention is easy to remove and burn the replacement nozzle with minimal intrusion of metal, and is easy to replace, and the replacement nozzle is lightweight and easy to position when mounting and fitting. Further, by providing such a structure, a nozzle refractory assembly which can mechanize the hot replacement work of the replacement nozzle is provided. A nozzle receiving integrated block and a replacement nozzle fitted below the integrated block, the lower surface of the nozzle receiving integrated block has a convex joint shape, and the upper surface of the replacement nozzle has a concave joint shape. A nozzle receiving refractory assembly characterized in that the joining shapes are fitted to each other, wherein at least the lower outer periphery of the nozzle receiving integrated block and the outer periphery of the replacement nozzle are covered and constrained with an iron plate. is there.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a molten metal container, such as a nozzle refractory assembly located at the bottom of a ladle.

[0002]

[Prior art]

 The molten steel discharge hole provided at the bottom of the ladle for molten steel is, for example, as shown in the longitudinal sectional view in FIG. The slide balf device (not shown) for controlling the flow rate is disposed below the structure.

The life of the refractory lined in the ladle is as wide as 70 to 150 charges, the life of the nozzle receiving refractory 3 is 1/2 to 1/4 of that, and the life of the upper nozzle 4 is It has a shorter life and is replaced by 1/6 to 1/20 (generally 7 to 10 charges) of the life of the refractory lined in the ladle. That is, the life of the upper nozzle is 1/3 to 1/5 of the life of the refractory received by the nozzle, and moreover, the upper nozzle is replaced and exchanged during the heat after the molten steel is discharged from the ladle. .

[0004]

[Problems to be solved by the device]

 With the conventional structure as described above, when replacing the upper nozzle, it is difficult and complicated to remove the upper nozzle due to phenomena such as seizure of the upper nozzle or intrusion of metal. It is known that heavy-duty work is performed near the ladle under high temperature, and it is also difficult to mechanize the upper nozzle withdrawal and replacement work for the above reasons.

[0005]

[Means for Solving the Problems]

 As shown by the dotted line 20 in FIG. 2, in view of the fact that the upper hole of the conventional type has a particularly large damage to the lower hole diameter as compared with the nozzle receiver, the inventors of the present invention conducted various examinations and experiments, and as a result, Has a completely different concept, that is, it is composed of a nozzle receiving integrated block and a replacement nozzle fitted below the integrated block, and the lower surface of the nozzle receiving integrated block is in a convex joint shape. A nozzle receiving refractory assembly characterized in that the upper surface of the nozzle has a concave joint shape and these concave and convex joint shapes are fitted to each other, wherein at least the lower outer periphery of the nozzle receiver integrated block and the outer periphery of the replacement nozzle are formed. The structure is covered and constrained by an iron plate.By adopting such a technical configuration, the replacement nozzle can be easily extracted and replaced without seizure of the replacement nozzle, intrusion of metal, and the replacement nozzle is light. Quantity and fitted And positioning is easy at the time of fitting, it becomes possible to further replacement work even mechanized in hot replacement nozzle by a such a configuration and child.

A detailed example of the present invention will be described with reference to FIG.

Reference numeral 1 denotes a nozzle receiver integrated block, which has a two-step downward convex shape, and a lower surface of the block 1 is provided with a convex joint shape 11 on a fitting surface with a replacement nozzle 2 described later. ing . It is preferable that at least the lower outer periphery of the nozzle receiving integrated block 1 is covered and constrained by the iron plate 14.

Reference numeral 2 denotes a replacement nozzle, which has a concave joint shape 12 on its upper surface (a fitting surface with the nozzle receiving integrated block), and the outer circumference of the replacement nozzle 2 is covered and restrained with an iron plate 15. Preferably.

The fitting and assembly of the nozzle receiving integrated block 1 and the replacement nozzle 2 described above are carried out by joining the fitting surfaces thereof with a refractory joining material such as mortar 13 to form an assembly. In the figure, 10 is a molten steel discharge hole.

The nozzle receiving integrated block 1 is made of castable refractory castable refractory such as basic high alumina, spinel, and alumina / carbon refractory, or formed into an integral block with bricks, and the outer periphery is covered with an iron plate and restrained. By doing so, it is possible to make the generation of cracks and the prevention of refractories from falling off more effectively.

The replacement nozzle 2 is a cast brick of cast brick or castable refractory such as Al ₂ O ₃ -C quality, high alumina quality, spinel quality or basic refractory, and the outer periphery is covered and constrained with an iron plate. As a result, it is possible to effectively prevent the generation, expansion and dropping of cracks.

[0012]

[Effect of device]

 (1) With the configuration of the present invention, seizure and intrusion of metal into the fitting portion of the nozzle receiving integrated block and the replacement nozzle are extremely reduced, and the replacement nozzle can be easily removed during replacement.

(2) The replacement nozzle to be replaced is light in weight, and positioning at the time of fitting is easy.

(3) In relation to the above-mentioned effects, the hot replacement work becomes easy, and the removal and mounting work of the replacement nozzle can be mechanized.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an example of the present invention.

FIG. 2 is a vertical sectional view of a conventional nozzle receiving refractory material.

[Explanation of symbols]

 1 Nozzle Receiver Integrated Block 2 Replacement Nozzle 10 Molten Steel Flow Hole 11 Convex Joint Shape 12 Concave Joint Shape 13 Refractory Mortar 14, 15 Coated Iron Plate 20 Lower Pore Diameter Damaged Part 22 Bottom Support Hardware 23 Nozzle Receiver 24 Upper Nozzle 25 Bottom Hardware

Claims (2)

[Scope of utility model registration request] 1. A nozzle receiving integrated block (1) and a replacement nozzle (2) fitted below the integrated block,
The lower surface of the nozzle receiving integrated block (1) has a convex joint shape (11), the upper surface of the replacement nozzle (2) has a concave joint shape (12), and these concave and convex joint shapes are fitted to each other. Nozzle receiving refractory assembly. 2. The nozzle-received refractory assembly according to claim 1, wherein at least a lower periphery of the nozzle-reception integrated block (1) and an outer periphery of the replacement nozzle (2) are covered and constrained with an iron plate.