JPH04165291A - Anchor structure for unshaped refractory lining material of melted iron, steel vessel - Google Patents

Abstract

PURPOSE:To use unshaped refractory lining material of a melted iron, steel vessel to its end term by inserting an outer end of a steel anchor into a steel tube, filling unshaped refractory material therearound to be secured in the tube, and welding the steel tube the to the shell of the vessel. CONSTITUTION:After the bent end of a Y-shaped steel anchor 3 is inserted into a steel tube 5, a castable refractory material 4 is filled in a space between the tube 5 and the anchor 3 as a core. After the material 4 is hardened, the outer surface of the tube 5 is welded to the inner surface of a tundish shell 1. A permanent lining bricks 2 of a refractory material are provided on the welded tube 5. Thereafter, the core is filled in the tundish, and the castable or other material 4 is filled between the core and the bricks 2. After the material 4 is hardened, it is removed from a frame, bried and then practically used.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an anchor structure for a monolithic refractory lining for a container for hot metal or molten steel, and more specifically, for an anchor structure for a lining for a container for hot metal or molten steel having a linear structure such as a tundish for continuous casting. Concerning the anchor structure of monolithic refractories.

Conventional technology': Anchors for monolithic refractories lining containers for pig iron and molten steel are
If the shape of the container is circular like a steel plate, it is not necessary because the monolithic refractory will not come out. However,
Monolithic refractories lined in containers with a straight line structure, such as tandem shells for continuous casting, have a protruding phenomenon, and in order to prevent this phenomenon, hot metal,
A steel anchor is welded directly to the steel skin in the molten steel zone.

This steel anchor is susceptible to corrosion damage due to molten metal, so it may be possible to make it made of refractory material to prevent corrosion damage, but if it is made of refractory material, the bond between the molten pig iron or molten steel container and the anchor is sufficient. The problem is that it is not.

In an anchor structure in which the monolithic refractory lining of a hot metal or molten steel container is pulled so as not to protrude, for example, if a Y-shaped steel anchor is welded directly to the steel skin of the container, the monolithic refractory will wear out and the anchor will At the stage of contact with molten metal, the reed force may be damaged by erosion, and there is a risk that the molten metal may pierce the iron skin of the molten metal container through the reed section, so monolithic refractories are used as linings for molten metal and molten steel containers until the end of their life. Therefore, it is necessary to repair the product at an early stage, which increases the manufacturing cost. Therefore, in practical use, as seen in Japanese Patent Laid-Open No. 62-158808, anchors are placed in locally damaged parts to repair them.

Furthermore, when anchor bricks are used, since the anchor bricks are brittle, they crack during use, resulting in the problem that the required functions cannot be fully demonstrated.

Problems to be Solved by the Invention The present invention aims to solve the above-mentioned problems, and specifically provides a monolithic refractory lining for hot metal and molten steel containers that can be used until the end of its life. The purpose is to propose an anchor structure for

Means for Solving the Problems and Their Effects The present invention provides an anchor construction for a monolithic refractory constructed inside a holding container for hot metal or molten steel, in which the outer end of the anchor is inserted into a steel pipe. At the same time, a monolithic refractory is filled around the steel receptacle in this steel pipe, and a steel anchor is fixed in the steel pipe via the monolithic refractory, and this steel pipe is connected to hot metal and steel in a molten steel container. Characterized by welding to the skin.

Hereinafter, the configuration and operation of the means of the present invention will be explained as follows.

The present inventors investigated a method for extending the life of monolithic refractories lining containers for hot metal and molten steel until the end of their life. It was discovered that the steel pipe could be welded to the shell of the molten steel container by preventing direct contact with the molten steel by using a monolithic refractory.

Further research and development was conducted, and the present invention was established based on this research.

According to the present invention, the steel anchor is fixed to the hot metal or molten steel container by fixing it in the steel pipe via a monolithic refractory such as a vAl anchor castable, and welding the steel pipe to the iron shell of the molten metal container. As a result, the edge of the steel anchor is cut off by the iron skin and the monolithic refractory, so even if the steel anchor is melted by hot metal or molten steel, it will not be damaged by hot metal or molten steel. Since the steel anchor is not eroded down to the skin of the molten steel container, the molten iron and molten steel container can be safely used until there is no remaining thickness of the monolithic refractory.

A more detailed explanation will be given below with reference to the drawings.

In addition, FIGS. 1(a) and 1(bl) each show one embodiment of the present invention, (a) is a cross-sectional view of the monolithic refractory lining of a tundish, and (bl is a part of the anchor part of (a). It is an enlarged sectional view.

Code 1 is tandaitsu iron skin, 2 is permanent brick, 3
4 indicates a steel anchor, 4 indicates a monolithic refractory, and 5 indicates a steel pipe.

As shown in Figures 1(a) and (b), the Y-shaped l
l4I! A steel pipe 5 having an inner diameter of 30 to 60 mm is prepared. After inserting the bent tip of the Y-shaped steel anchor 3 into the steel pipe 5, the castable refractory 4 was stuffed into the space between the steel pipe 5 and the steel anchor 3 to form a core. After hardening of the castable refractory 4, the steel pipe 5
Weld the outer surface of the tongue tissue iron skin 1 to the inner surface of the tongue tissue skin 1. Then, permanent tension bricks 2 made of refractory are constructed on the welded steel pipes 5. Thereafter, a core is placed in the tundish, and a monolithic refractory material 4 such as castable is filled between the core and the permanent tension bricks 2. After the monolithic refractory 4 has hardened,
Remove the frame and dry*m for actual use.

The reason for setting the steel pipe diameter to 30 to 60 m is that in order to completely cut off the edge between the steel pipe and the reeds with the monolithic refractory 4, it is necessary to
Since a distance of I1 or more is required, and the steel pipe 5 needs to fit under the permanent tension brick, the dimensions were limited to the above.

According to the results of actual use of the tandem shell employing the present invention, the monolithic refractory material 4 such as castor metal does not peel off or fall off due to the steel anchor. Also, it could be used until the permanent tension was exposed.

Although the present invention has been described above using the example of a Y-shaped steel anchor, the present invention is not limited to this, and may be of other shapes, such as a T-shaped anchor.

<Effects of the Invention> As explained in detail above, the present invention provides an anchor structure for a monolithic refractory constructed inside a holding container for hot metal or molten steel, in which the outer end of a steel anchor is inserted into a steel pipe and , Fill the area around the steel anchor in this steel pipe with a monolithic refractory, fix the steel anchor inside the steel pipe via the monolithic refractory, and weld this steel pipe to the steel skin of the hot metal or molten steel container. It is characterized by

According to the present invention, since the hot metal, the shell of the molten steel container, and the steel reel are fixed via the monolithic refractories, the melting loss of the steel anchor due to the hot metal and molten steel does not proceed to the steel shell. Hot metal and molten steel containers can be used safely until the end of the life of lined monolithic refractories.

[Brief explanation of the drawing]

Figures 1 (a) and (b) each show one embodiment of the present invention, where (a) is a cross-sectional view of the monolithic refractory lining of a tundish, and (bl is a partially enlarged view of the anchor part in (a)). It is a cross-sectional view. Code 1... Tanditetsu iron skin 2...
Permanent tension brick 3... Steel anchor 4... Monolithic refractory 5... Steel pipe

Claims (1)

[Claims] 1) In an anchor structure of a monolithic refractory constructed inside a holding container for hot metal or molten steel, the outer end of the steel anchor is inserted into a steel pipe, and a monolithic refractory is installed around the steel anchor inside the steel pipe. Hot metal, characterized in that it is filled with a refractory, the steel anchor is fixed in the steel pipe via the monolithic refractory, and the steel pipe is welded to the hot metal or to the skin of a molten steel container;
Anchor structure of monolithic refractory lining of molten steel container.