Novel slag line brick for steel ladle

Abstract

According to the novel slag line brick for the steel ladle, the whole slag line brick is of a blocky structure, the position, close to the wall of the steel ladle, of the upper surface of the slag line brick is provided with a top face boss protruding upwards, the position, close to the wall of the steel ladle, of the lower surface of the slag line brick is provided with a bottom face groove sunken upwards, and the protruding top face boss can be arranged in the bottom face groove. A boss and a groove which are matched with each other are arranged on two sides of the slag line brick; according to the utility model, the design structure is reasonable, the step and groove structures which are matched with each other are arranged in the vertical direction, and the step and groove structures which are matched with each other are also arranged in the horizontal direction, so that after the slag line bricks are built, the staggered joint effect can be realized in the horizontal and vertical directions in the steel ladle; molten slag can be prevented from moving from brick joints to the ladle wall, and the service life of the steel ladle is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of ladle refractory lining brick design, and particularly relates to a new type of slag line brick for ladles. Background Art

[0002] The slag line brick usually refers to the refractory brick laid in the area from the third layer to the eighth layer downward from the ladle opening during steelmaking production. This part is directly in contact with high-temperature molten steel and air, and due to the influence of temperature difference and oxygen-rich environment, the erosion rate is significantly faster than other parts. During the ladle refining process, the erosion of the slag line magnesia-carbon brick is the most serious area among the damage conditions of each part of the furnace lining, and it is constantly chemically eroded and mechanically scoured by molten slag. At present, the slag line brick often gets damaged from the brick joints during use, and breaks after being used several times. As the use time increases, molten slag continuously invades from the brick joints, causing premature damage to the slag line brick, shortening its service life, and seriously damaging the ladle steel shell in severe cases. Summary of the Utility Model

[0003] In order to solve the above technical problems, the utility model provides a new type of slag line brick for ladles, which not only has mutually matching step and groove structures in the vertical direction, but also has mutually matching step and groove structures in the horizontal direction. After the slag line bricks are laid, a staggered joint effect can be achieved in both the horizontal and vertical directions inside the ladle, which can prevent molten slag from moving from the brick joints towards the ladle wall and extend the service life of the ladle.

[0004] The technical solution adopted by the utility model is: a new type of slag line brick for ladles, the whole slag line brick is a block structure, the position of the upper surface of the slag line brick close to the ladle wall has a top surface convex platform protruding upward, the position of the lower surface of the slag line brick close to the ladle wall has a bottom surface groove sunken upward, and the protruding top surface convex platform can be placed in the bottom surface groove. Mutually matching convex platforms and grooves are provided at both sides of the slag line brick.

[0005] The convex platform and the groove on both sides of the slag line brick are respectively a side convex platform and a side groove. The side convex platform is arranged at one end of the slag line brick close to the ladle wall on one side, and the side groove is arranged at one end of the slag line brick on the other side and close to the ladle wall.

[0006] The whole slag line brick is in a block-shaped fan structure, and its width gradually increases towards the ladle wall.

[0007] Inclined surfaces are formed from top to bottom at the front and rear ends of the slag line brick.

[0008] The beneficial effects of the utility model are:

[0009] The utility model has a reasonable design structure, not only in which mutually matching step and groove structures are arranged in the vertical direction, but also in the horizontal direction. After the slag line bricks are laid, the staggered seam effect can be achieved in both the horizontal and vertical directions inside the ladle, which can prevent the slag from moving from the brick seams to the ladle wall, thereby extending the service life of the ladle. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a three-dimensional diagram of the utility model;

[0011] Figure 2 It is a top view of the utility model;

[0012] Figure 3 For this utility model Figure 2 Sectional view of AA in the middle;

[0013] Figure 4 For this utility model Figure 3 Cross-sectional view of BB.

[0014] Among them: 1. Top surface boss; 2. Bottom surface groove; 3. Side surface boss; 4. Side surface groove; 5. Inclined surface. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] As shown in the figure, a new type of slag line brick for a ladle has a block structure as a whole. Specifically, the slag line brick has a block-shaped fan-shaped structure as a whole, and its width gradually increases toward the ladle wall. The fan shape is adopted because the ladle is an overall circular structure, and the slag line brick is built in a ring shape inside the ladle. Therefore, the fan-shaped structure can better fit with the inner wall of the ladle and improve the stability of the structure.

[0017] The upper surface of the slag line brick is provided with an upwardly protruding top boss 1 near the ladle wall, and the lower surface of the slag line brick is provided with an upwardly recessed bottom groove 2 near the ladle wall. The protruding top boss 1 can be placed in the bottom groove 2, and mutually matching bosses and grooves are provided on both sides of the slag line brick.

[0018] Specifically, the bosses and grooves on both sides of the slag line brick are side bosses 3 and side grooves 4 respectively. The side boss 3 is arranged on one side of the slag line brick close to the ladle wall, and the side groove 4 is arranged on the other side of the slag line brick close to the ladle wall.

[0019] Among them, the height by which the top surface boss 1 protrudes outward is 1 / 3 of the thickness of the slag line brick, and the depth by which the bottom surface groove 2 depresses upward is 1 / 3 of the thickness of the slag line brick, which is used to effectively achieve the staggered joint effect in the vertical direction and prevent the molten slag from further eroding towards the ladle wall. Further, the purpose of setting the side surface boss 3 and the side surface groove 4 is the same as that of the top surface boss 1 and the bottom surface groove 2, which is also to achieve the staggered joint effect in the horizontal direction after the slag line bricks are laid.

[0020] The front and rear ends of the slag line brick are formed with inclined surfaces 5 from top to bottom. The purpose of this setting is that since the inner wall of the ladle is a conical structure, setting the inclined surfaces 5 is to enable the inner wall to maintain a smooth transition after the slag line bricks are laid, improve the structural stability after laying, and also improve the impact resistance and erosion resistance of the subsequent slag line bricks.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A new type of slag line brick for ladle, characterized by: The slag line brick is a block structure as a whole. The upper surface of the slag line brick is provided with an upwardly protruding top boss near the ladle wall, and the lower surface of the slag line brick is provided with an upwardly recessed bottom groove near the ladle wall. The protruding top boss can be placed in the bottom groove, and mutually matching bosses and grooves are provided on both sides of the slag line brick.

2. The new type of slag line brick for ladle according to claim 1 is characterized in that: The bosses and grooves on both sides of the slag line brick are side bosses and side grooves respectively. The side bosses are arranged on one side of the slag line brick close to the ladle wall, and the side grooves are arranged on the other side of the slag line brick close to the ladle wall.

3. The new type of slag line brick for ladle according to claim 1, characterized in that: The slag line brick has a block-shaped fan-shaped structure as a whole, and its width gradually increases toward the ladle wall.

4. The new type of slag line brick for ladle according to claim 1 is characterized in that: The front and rear ends of the slag line brick are formed with inclined surfaces from top to bottom.

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