CN201359437Y - Pre-assembly steel-tapping hole sleeve brick for electric furnace - Google Patents

Abstract

The pre-assembled tapping hole bricks for electric furnaces are surrounded by combined seat bricks, and the middle is poured with castables. The whole brick and seat brick are bonded together, and one end brick is placed at the end of the integral combined brick to form a The pre-assembled electric furnace tapping hole bricks and the whole working brick can be replaced as a whole, which improves the service life of the refractory materials for the electric furnace tapping hole, improves the replacement efficiency, and reduces the cost of refractory consumption per ton of steel. The close fit of the end bricks and the peripheral seat bricks can effectively improve the structural strength of the overall set of bricks and improve the safety of the installation of the set of bricks; The shrinkage is non-directional, which eliminates the phenomenon of firing cracks caused by pressure caused by density differences during mechanical pressing, and is easy to disassemble. Magnesium castables can provide suitable sintering strength, effectively increase the replacement frequency, prolong the service life and reduce the cost.

Description

Pre-assembled tapping hole bricks for electric furnace

technical field

The utility model relates to a pre-assembled tapping hole brick used for the tapping hole of an electric furnace.

Background technique

In recent years, with the development of electric furnace technology, the requirements for refractory materials for taphole parts have become more and more stringent. Among them, the replacement technology for taphole parts of electric furnaces has mainly experienced two development stages: "lower eye type" and "boring type". When the tap hole is replaced by the "lower eye type", due to the limitations of manual cleaning of the original tap hole, such as the irregular inner wall of the tap hole, the pits are not easy to fill, and the tap hole has been washed away by molten steel and slag for a long time. Erosion, deviation of the center of the inclination angle of the tap hole, inaccurate positioning, and scattered flow of the steel, resulting in a large amount of slag. After using the "boring hole type" to replace the tapping hole, the comparison with the "bottom hole type" shows that the replacement operation time of the tapping hole is reduced to a certain extent, the service life of the tapping hole is improved, and the distribution of tapping time tends to be more reasonable. With the improvement of smelting technology, the above two replacement methods can no longer meet the requirements of modern steelmaking. How to improve the replacement efficiency of tapholes and reduce the cost of refractory consumption per ton of steel has become an urgent problem to be solved.

Contents of the invention

In order to solve the above existing problems, the utility model provides a pre-assembled tapping hole brick for electric furnaces with long service life and improved tapping hole replacement efficiency; the purpose of the utility model is achieved through the following technical solutions: a The pre-assembled tapping hole bricks for electric furnaces include peripheral seat bricks, end bricks, magnesia castables and integral working bricks. The upper end of the peripheral seat brick has a concave surface and the lower end surface has a convex surface. Integral working brick, magnesia castable is filled between the peripheral seat brick and the integral working brick, an end brick is installed at one end of the peripheral seat brick, and the brick body of the end brick is made with a concave surface matching the peripheral seat brick. The brick is closely glued to the concave and convex surface of the brick body of the peripheral seat brick.

Beneficial effects of the utility model: the utility model adopts the combination of the integral type and the combined type, the periphery is the combined seat brick, and the middle is poured with the castable, and the integral brick and the seat brick are bonded together, and the integral brick The end of the combination brick is matched with one end brick to form a pre-assembled electric furnace tapping hole brick, in which the whole working brick can be replaced as a whole. This method can improve the service life of the refractory material used in the electric furnace tapping hole, improve the replacement efficiency, and reduce the ton The cost of steel refractory consumption has played a positive role in promoting. The close fit of the end bricks and the peripheral seat bricks can effectively improve the structural strength of the overall set of bricks and improve the safety of the installation of the set of bricks; The shrinkage is non-directional, which eliminates the phenomenon of firing cracks caused by pressure caused by density differences during mechanical pressing, and is easy to disassemble. Magnesium castables can provide suitable sintering strength, effectively increase the replacement frequency, prolong the service life and reduce the cost.

Description of drawings

Fig. 1 is the structural representation of the pre-assembled tapping hole brick of electric furnace;

Fig. 2 is a schematic diagram of the peripheral seat brick of a pre-assembled tapping hole brick for an electric furnace;

Fig. 3 is the top view of Fig. 2;

Figure 4 is an enlarged view of the concave surface in Figure 2;

Figure 5 is an enlarged view of the convex surface in Figure 2;

Fig. 6 is a structural schematic diagram of a pre-assembled tapping hole brick end brick for an electric furnace;

Figure 7 is a top view of Figure 6;

Fig. 8 is a schematic structural view of the integral working brick of the pre-assembled tapping hole brick for electric furnace;

FIG. 9 is a side view of FIG. 8 .

Detailed ways

A pre-assembled tapping hole brick for an electric furnace, including a peripheral seat brick 2, an end brick 1, a magnesia castable 3 and an integral working brick 4, wherein the peripheral seat brick 2 adopts a special-shaped magnesia-carbon brick, and the peripheral seat brick 2 There is a concave surface 5 on the upper end surface of the brick body, and a convex surface 6 on the lower end surface. Several peripheral seat bricks are matched and connected through the concave and convex surfaces, and are bonded with a caulking glue to form a combined brick body with a certain structural strength. There is an integral working brick 4, and the magnesia castable 3 is filled between the peripheral seat brick 2 and the integral working brick 4, and an end brick 1 is installed on one end of the peripheral seat brick 2, and the brick body of the end brick 1 is made with a peripheral seat The concave surface 7 matched by the bricks, when assembled, the concave-convex surface of the brick body of the end brick 1 and the peripheral seat brick 2 is closely glued.

Claims (1)

1. A pre-assembled tapping hole brick for an electric furnace, characterized in that it includes peripheral seat bricks, end bricks, magnesia castables and integral working bricks, the upper end of the peripheral seat brick has a concave surface, and the lower end surface has a convex surface , there is an integral working brick in the peripheral seat brick, magnesia castable is filled between the peripheral seat brick and the integral working brick, an end brick is installed at one end of the peripheral seat brick, and the brick body of the end brick is made with the peripheral seat The concave surface of the brick matches, and the end brick is closely glued to the concave and convex surface of the brick body of the peripheral seat brick during assembly.

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