KR200180023Y1 - Laddle for casting - Google Patents

Abstract

The present invention is provided with a cooling jacket on the inner wall slain of the ladle in which the slag layer is in contact with the molten steel surface when the molten steel is injected into the casting ladle to protect the interior edge 12 and the shell 11 from the high temperature of molten steel (20) ) Is to protect the casting ladle 10, the configuration is a jacket 120 formed inside the inner edge 12 and the contact with the slain (20), and the coolant inlet 121 of the cooling jacket 120 In the secondary refining is configured to couple the gas pipe 130 in communication with the quick coupling device 15 and coupled to the coolant outlet 122 in conjunction with the gas pipe 130 in communication with the porous block 14. By using the injected inert gas as a coolant to protect the built-in lead 12 and the shell 11 from the high temperature of the molten steel to extend the life of the ladle as well as injecting the inert gas heated by heat exchange into the porous block 14 Temperature of the porous block 14 and the inert gas To prevent the porous block (14) melting the release caused by the slag it relates to the casting in which the rail line is to protect.

Description

Ladle grain protected casting ladle {Laddle for casting}

The present invention relates to casting ladles in which the slag is protected. In detail, the present invention includes a cooling jacket on the inner wall of the ladle in which the slag layer floating on the molten steel surface is in contact with the molten steel. The present invention relates to cast irons in which slag protection from high heat is protected.

In the steel mill, steel or iron is dissolved in the steelmaking furnace, and the steel is added by the necessary alloying elements to make the steel, and the molten steel is transferred to the casting ladle for the secondary refining or casting work of the molten steel. The cast iron is a very important equipment to be equipped for the follow-up of molten steel.

As shown in FIG. 1, conventional cast irons are surrounded by an inner shell 11 and are built with a built-in lead 12 to withstand high temperature molten steel, and have slag and oxygen in contact with the slag. In response to erosion with the refractory smoke generated by the action of, the refractory softening layer is thicker than the other parts.

In addition, the sliding nozzle device on the bottom to adjust the discharge of molten steel during casting

A porous porous block for injecting inert gas during the secondary refining at the same time as 13 is provided.

14 is provided, and an automatic quick coupling device 15 for supplying an inert gas to the porous block 14 is attached.

The life span of the cast rollers having the above-described structure is erosion and dropping by the molten steel of the refractory smoked wine built inside the cast rollers 12, and the degree of melt loss of the porous porous block 14 used in the secondary refining. The longevity is directly determined by the productivity and the quality of molten steel, and many efforts are made to extend the life of the ladle.

The main factors that shorten the life of the conventional ladle is the erosion of the built-in lead in contact with the molten steel due to the high temperature of the molten steel of 1500 ° C or more, especially in the slag in which the slag layer in contact with the external air is in contact with the external air due to the specific gravity difference. This is due to severe local erosion, which is due to chemical reactions that occur when internal smoke combines with oxygen in the air.

As another factor, as shown in FIG. 1, due to premature dropping of the built-in lead 12, the steel bar 11 of the cast rods surrounding the built-in lead 12 may be deformed into a fallopian tube shape by the high temperature of molten steel. There is a dropout of 12).

As another molten iron of the porous block 14, the inert gas supplied to the porous block 14 for secondary refining comes into contact with the porous block 14 of the coon and is generated by a temperature difference. The cast iron had a problem of shortening the life.

Therefore, the technical problem to be achieved by the present invention is not only to protect the steel bar of the cast iron from the high temperature of molten steel in order to solve the above-mentioned problems, as well as to protect the internal smoke of the slagine part from the high temperature of molten steel and to supply the inert gas supplied to the porous block. It is to provide a ladle of the shape to increase the temperature of the shape to prevent the loss of the porous block caused by the temperature difference with the porous block.

1 is a longitudinal sectional view of a conventional casting ladle

Figure 2 is a longitudinal cross-sectional view of the cast iron provided with the present invention

Figure 3 is a cross-sectional view of the cast iron provided with the present invention

[Description of Major Code in Drawing]

10 ... Casting Ladle 11 ... Iron Bar

12 ... built-in lead and 13 ... sliding nozzle

14 ... porous block 15 ... coupling device

20 ... slag line 120 ... cooling jacket

121 ... inlet 122 ... outlet

130 ... gas pipe

The configuration for achieving the technical problem to be achieved by the above-described design is the outer shell is surrounded by a shell, the inner side is constructed with a built-in edge to accommodate the high temperature molten steel and the sliding nozzle device for controlling the discharge of molten steel on the bottom surface and In a ladle equipped with a porous porous block for inert gas injecting inert gas during the secondary refining and an automatic quick coupling (E) device for supplying an inert gas to the porous block, the surface of the molten steel has a built-in lead in contact with the slain Forming a cooling jacket to the inside, and coupled to the gas pipe communicated to the automatic coupling device to the coolant inlet provided in the cooling jacket and to the gas cooler coupled to the porous block to the allure coolant outlet.

Hereinafter, described in detail with reference to the prepared embodiment as follows.

In the above-described conventional casting ladle 10, the coolant injection port 121 and the coolant discharge port 122 is provided inside the inner edge 12 and the inner surface of the molten steel is in contact with the slain (20) is a built-in lead ( A gas pipe communicating with a quick coupling device 15 which automatically supplies an inert gas to the cooling jacket 120 formed in an annular shape along the circumferential surface of the 12 and the coolant inlet 121 provided in the cooling jacket ( In addition to the combination 130, the coolant outlet 122 is composed of a gas pipe 130 coupled to communicate with the porous block 14 provided on the bottom of the ladle.

When described in detail by the following action.

In the case of performing secondary refining after taking molten steel in the ladle equipped with the present invention, the low temperature inert gas supplied from the quick coupling device 15 for bottom bubbling operation is introduced into the cooling jacket 120. The built-in edge 12 and the shell 11 of the slain portion 20 of the ladle is cooled to prevent high temperature deformation of the shell 11 and at the same time, the built-in edge 12 of the slain portion 20 is molten steel and air. It prevents the built-in smoke 12 and thermal spalling phenomenon generated when contacting the air.

In addition, the inert gas discharged after cooling the steel shell 11 and the inner lead 12 by circulating the cooling jacket 120 is introduced into the porous block 14 as the temperature is raised by heat exchange in the cooling jacket. It is possible to extend the life span of the porous block 14 by reducing the thermal spallability due to the temperature difference with the high temperature porous block 14.

In addition, the moisture in the gas is removed as the temperature of the inert gas rises, and the volume expansion of the gas allows the bubbling effect of the molten steel to be obtained with only a small amount of gas. As a result, there is a side effect of minimizing the temperature drop of molten steel when it is introduced into the molten steel.

The effect of the present invention is to cool the slag-line internal smoke and steel bar, and to reduce the internal smoke and dropping caused by the deformation of the steel bar by high temperature, and to reduce the internal smoke and erosion, to extend the life of the ladle, and to raise the temperature of the inert gas. By reducing the temperature of the porous block caused by the temperature difference between the gas and the porous block, the life of the ladle is extended and the bubbling effect of the molten steel can be obtained even with a small amount of gas due to the expansion of the gas volume. And it is effective to minimize the temperature drop of molten steel.

Claims (1)

The outside is surrounded by a shell (11), and the inner side is constructed with a built-in lead 12 to accommodate high temperature molten steel and withstands the sliding nozzle device 13 for controlling the discharge of molten steel on the bottom and inert during secondary refining. Porous porous block 14 for injecting gas, In a conventional ladle equipped with an automatic quick coupling device 15 for supplying an inert gas to the porous block, the cooling jacket 120 is provided in the interior of the built-in lead 12 in which the slain 20, which is the surface of the molten steel, contacts. ) And a gas pipe 130 connected to the quick coupling device 15 to the coolant inlet 121 provided in the cooling jacket, and to the porous block 14 at the coolant outlet 122. Slat grain protected casting ladle, characterized in that for coupling the gas pipe 130