Novel converter slag blocking inlay ring inner slide plate brick

Abstract

A new type of slide plate brick inlayed ring for converter slag dam is provided, which comprises a slide plate body and a whole circular inlayed ring, a section of plane side surface is arranged on the curved side surface of the inlayed ring, a molten steel hole is arranged in the middle part of the inlayed ring, the end part of the slide plate body is provided with an embedded hole matched with the size of the inlayed ring, and the inlayed ring is matched and sleeved into the embedded hole; an arc surface gap is formed between the curved side surface and the embedded hole, a straight surface gap is formed between the plane side surface and the embedded hole, thick jointing fire mud is arranged in the arc surface gap, and thin jointing fire mud is arranged in the straight surface gap; the problem of serious erosion of the jointing fire mud at the long end of the slide plate is effectively solved, and the penetration of molten steel and the inclusion of cold steel at the jointing fire mud at the long end of the slide plate during multiple sliding of the slide plate are avoided.

Description

Technical Field

[0001] This utility model relates to the field of steelmaking refractory materials, and in particular to a novel inner sliding plate brick for converter slag baffle insert ring. Background Technology

[0002] In converter slag-blocking refractories, the sliding plate bricks are located within the sliding plate cavity of the converter slag-blocking mechanism. They are typically divided into inner and outer sliding plates. The inner sliding plate is paired with the inner nozzle, and the outer sliding plate with the outer nozzle. The working surfaces of the inner and outer sliding plates slide together. All the refractory materials and their matching sliding mechanism components constitute a flow control system. The working principle of converter slag-blocking refractories is similar to that of ladle refractories. During operation, the opening and closing of the casting holes is achieved through the pulling or pushing force provided by the hydraulic cylinder, thereby controlling and limiting the flow.

[0003] During the steel casting process, high-temperature, high-speed molten steel flows in from the inner nozzle and passes through the inner and outer slide gates. During this erosion process, the slide gate holes are severely corroded by the molten steel. Different steel grades and casting times result in varying degrees of erosion of the casting holes, leading to significant reduction in the lifespan of the slide gates due to enlarged casting holes. The average lifespan is generally around 15 cycles. This necessitates replacement of the slide gates once they reach a certain unsatisfactory condition. Of course, short-life, low-utilization slide gates often result in high costs and high-risk returns, thus failing to maximize corporate profits.

[0004] In the current downturn of the steel industry, cost reduction and efficiency improvement are crucial for maximizing corporate profits and ensuring healthy development. This forces most companies to focus on improving the performance of sliding plates. "Inlaying" is one of the most convenient and effective methods. For example, inlaying ring-shaped zirconium products into the casting holes of the inner sliding plate can effectively extend its lifespan. However, this also presents significant problems. The issue is that the fire mortar layer between the inlaid ring and the inlay hole in the brick blank is evenly distributed, and to ensure the stability of the inlay, the thickness of the fire mortar layer is relatively large. During use, the friction and pressure experienced by the inlay area near the long end of the sliding plate are greater. After repeated opening and closing operations under high temperatures, the fire mortar layer at the far end is continuously eroded by molten steel, causing problems such as molten steel penetration and cold steel inclusions in the far end fire mortar layer, increasing the risk of steel leakage. This needs to be improved. Utility Model Content

[0005] To address the aforementioned problems, this utility model proposes a novel inner sliding plate brick for converter slag-blocking embedded rings.

[0006] The technical solution of this utility model is: a novel converter slag-blocking embedded ring inner sliding plate brick, comprising a sliding plate body and an integrally circular embedded ring, the thickness of the embedded ring being the same as the thickness of the sliding plate body, a section of flat side surface being provided on the curved side surface of the embedded ring, a steel flow hole being provided in the middle of the embedded ring, and an embedding hole matching the size of the embedded ring being provided at the end of the sliding plate body, the embedded ring fitting into the embedding hole, and a certain gap being provided between the two after fitting; an arc-shaped gap is formed between the curved side surface and the embedding hole, the arc-shaped gap being an arc with one end being larger than the curve, and a straight gap is formed between the flat side surface and the embedding hole, and mortar is provided in the arc-shaped gap and the straight gap.

[0007] Preferably, the center of the flow steel hole is eccentrically arranged in the opposite direction to the planar side of the inlay ring, so that the distance between the center of the flow steel hole and the planar side and the distance between the center of the flow steel hole and the curved side are basically the same.

[0008] Preferably, the eccentric dimension is a, where 4mm ≤ a ≤ 5mm.

[0009] Preferably, the thickness of the thick filler mortar is b, where 2mm ≤ b ≤ 3.5mm.

[0010] Preferably, the thickness of the thin mortar is c, where 0.5mm ≤ c ≤ 1mm.

[0011] Preferably, the outer side of the skateboard body is fitted with a steel hoop, and the upper and lower surfaces of the steel hoop are respectively provided with a certain distance from the surface of the skateboard body.

[0012] Preferably, the inlaid ring is a zirconium ring.

[0013] The beneficial technical effects of this utility model are as follows: This utility model provides a planar side surface located at the far end on the outer side of the inlay ring, which reduces the extension dimension of the outer side of the inlay ring towards the long end of the slide plate. At the same time, a thick mortar is placed in the gap formed by the curved side surface of the inlay ring to ensure the stability of the overall inlay, and a thin mortar is placed in the gap formed by the planar side surface to reduce the erosion of molten steel. This effectively solves the problem of severe erosion of the mortar seam at the long end of the slide plate, and avoids the occurrence of molten steel penetration and cold steel inclusion at the mortar seam at the long end of the slide plate during repeated sliding. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 yes Figure 1 A schematic diagram of the AA-direction cross-section structure;

[0016] Figure 3 This is a three-dimensional structural diagram of the components of this utility model after they have been unfolded.

[0017] Figure 4 This is a schematic diagram of the existing embedded sliding plate brick structure.

[0018] In the figure, 1. Slide body, 11. Embedded hole, 2. Inlay ring, 21. Flow steel hole, 22. Curved side surface, 23. Flat side surface, 31. Thick grout, 32. Thin grout, 4. Steel hoop, 101. Existing inlay ring, 102. Existing grout. Detailed Implementation

[0019] Example 1, see appendix to the instruction manual. Figure 1-3 A novel converter slag-blocking embedded ring 2 inner sliding plate brick includes a sliding plate body 1 and an integrally circular embedded ring 2. A flat side 23 is provided on the curved side 22 of the embedded ring. A steel flow hole 21 is provided in the middle of the embedded ring 2. The end of the sliding plate body 1 is provided with an insertion hole 11 that matches the size of the embedded ring 2. The embedded ring 2 fits into the insertion hole 11. The outer diameter of the embedded ring 2 is slightly smaller than the diameter of the insertion hole 11 to reserve a gap for the filler mortar. An arc-shaped gap is formed between the curved side 22 and the insertion hole 11, and a straight gap is formed between the flat side 23 and the insertion hole 11. A thick filler mortar 31 is provided in the arc-shaped gap to ensure the stability of the overall embedding. A thin filler mortar 32 is provided in the straight gap to reduce the erosion of molten steel. Meanwhile, the flat side 23 set on the inlay ring 2 reduces the extension dimension of the outer side of the inlay ring 2 towards the long end of the slide plate, effectively solving the problem of severe mud erosion at the inlay of the long end of the slide plate, and preventing the occurrence of molten steel penetration and cold steel inclusion at the mud joint of the long end of the slide plate during multiple slides.

[0020] The thickness of the thick filler mortar 31 is b, where 2mm ≤ b ≤ 3.5mm, and the thickness of the thin filler mortar 32 is c, where 0.5mm ≤ c ≤ 1mm. A steel hoop 4 is fitted onto the outer side of the skateboard body 1, and the inlaid ring 2 is a zirconium ring.

[0021] The assembly process of the inner slide block brick of the novel converter slag retaining ring 2 in this embodiment is as follows: the outer side of the ring 2 is evenly coated with mortar, and the inner hole 11 of the slide block body 1 is also coated with mortar. The ring 2 coated with mortar is inserted into the inner hole 11. The dimensions of the thick mortar 31 and the thin mortar 32 are measured respectively. After the dimensions of b and c are met, the ring 2 is fixed firmly to the slide block body 1 with tooling fixtures and dried. Then, the hot-fitting steel hoop 4, asbestos board is glued, coating and other processes are carried out to complete the assembly of the finished product.

[0022] Example 2, see appendix to the instruction manual. Figure 1This embodiment is basically the same as Embodiment 1, and the similarities will not be repeated. The difference is that the center of the flow hole 21 is eccentrically arranged in the opposite direction to the planar side surface 23 of the inlaid ring 2, and the eccentricity is 'a', where 4mm ≤ a ≤ 5mm. After setting the planar side surface 23 on the inlaid ring 2, the existing method of concentric arrangement of the flow holes 21 will result in a thinner ring sidewall at the planar side surface 23, leading to an uneven overall erosion resistance of the inlaid ring 2. This embodiment compensates for the unevenness of the sidewall of the inlaid ring 2 by eccentrically arranging the flow holes 21, ensuring that it has sufficient erosion resistance.

Claims

1. A novel type of slide block brick for the inner ring of a converter slag-blocking device, characterized in that: The device includes a skateboard body and an integrally circular inlay ring. A flat side surface is provided on the curved side surface of the inlay ring. A steel flow hole is provided in the middle of the inlay ring. An insertion hole matching the size of the inlay ring is provided at the end of the skateboard body. The inlay ring fits into the insertion hole. An arc-shaped gap is formed between the curved side surface and the insertion hole, and a straight gap is formed between the flat side surface and the insertion hole. Thick mortar is provided in the arc-shaped gap, and thin mortar is provided in the straight gap.

2. The novel converter slag-blocking embedded ring inner sliding plate brick according to claim 1, characterized in that: The center of the flow steel hole is eccentrically arranged in the opposite direction to the side plane of the inlaid ring.

3. The novel converter slag-blocking embedded ring inner sliding plate brick according to claim 2, characterized in that: The eccentric dimension is a, where 4mm ≤ a ≤ 5mm.

4. The novel converter slag-blocking embedded ring inner sliding plate brick according to claim 1, characterized in that: The thickness of the thick mortar is b, where 2mm ≤ b ≤ 3.5mm.

5. The novel converter slag-blocking embedded ring inner sliding plate brick according to claim 1, characterized in that: The thickness of the thin mortar is c, where 0.5mm ≤ c ≤ 1mm.

6. The novel converter slag-blocking embedded ring inner sliding plate brick according to claim 1, characterized in that: The outer side of the skateboard body is fitted with steel hoops.

7. The novel converter slag-blocking embedded ring inner sliding plate brick according to claim 1, characterized in that: The inlaid ring is a zirconium ring.

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