Middle plate structure of tundish sliding plate

Abstract

The utility model belongs to the technical field of continuous casting tundish sliding plates, and particularly relates to a middle plate structure of a tundish sliding plate, which comprises a middle plate body provided with a middle hole, and is characterized in that a thinning groove is arranged on the upper surface of the middle plate body, is positioned on one side of the middle hole facing the small end of the middle plate body, and is as wide as the diameter of the middle hole; the length l of the thinning groove is 55-60 mm, the included angle alpha between the inclined groove bottom and the upper surface of the thinning groove is 30-35 degrees, the distance h between the intersecting line of the groove bottom and the middle hole and the lower surface of the middle plate body is 15-18 mm, and the surface of the inner wall of the thinning groove is smooth and free of holes. The utility model has the beneficial effects that the resistance of the steel flowing channel is greatly reduced, and the inclusion accumulation phenomenon is obviously reduced, so that the accumulation of inclusions on the surface of the middle plate is greatly reduced, the choked flow state of the original molten steel is changed, the time of water gap blockage is delayed, the number of continuous casting furnaces is increased by 4-5, meanwhile, the product quality is also improved, and the production cost is reduced. And considerable economic benefits are created for the society.

Description

Technical Field

[0001] This utility model belongs to the field of continuous casting tundish slide plate technology, and particularly relates to a tundish slide plate structure. Background Technology

[0002] In the continuous casting process of 1600mm slab casting machines, the clogging rate of low-carbon aluminum killed steel is as high as 100%. Mild clogging allows for the completion of the planned casting cycle, while severe clogging not only reduces the number of consecutive castings but can also lead to accidental casting interruptions, causing numerous adverse effects on production and costs. Currently, IF steel is cast using a slide gate ladle. Through on-site tracking, investigation, and analysis, it was found that among the many casting cycles with nozzle clogging, clogging at the slab position (middle plate of the slide gate) accounts for over 98%. Once the nozzle is clogged, the liquid level and slide gate fluctuate significantly. Furthermore, inclusions falling off from the steel flow channel also create inclusions inside the slab, affecting the final product quality. Therefore, solving or mitigating the clogging problem at the middle plate of the slide gate will help IF steel production and improve its internal quality; thus, the modification of the middle plate is imperative. Utility Model Content

[0003] The purpose of this invention is to provide a middle plate structure for a middle plate slide plate, which overcomes the shortcomings of the prior art, reduces the blockage between plates caused by the accumulation of inclusions in the middle plate, and solves the problem of severe turbulence of inclusions between the flow control plates of the continuous casting slide plate, which affects the smooth flow of the casting process.

[0004] To achieve the above objectives, this utility model employs the following technical solution:

[0005] A mid-plate structure for a mid-plate skateboard includes a mid-plate body with a central hole. The upper surface of the mid-plate body has a thinning groove located on the side of the central hole facing the small end of the mid-plate body. The diameter of the thinning groove is the same as that of the central hole. The length l of the thinning groove is 55-60 mm. The angle α between the bottom of the groove and the upper surface is 30-35°. The distance h from the bottom of the groove to the lower surface of the mid-plate body is 15-18 mm. The inner wall surface of the thinning groove is smooth and without holes.

[0006] Furthermore, the diameter D of the central hole is 65±1mm.

[0007] Furthermore, the thickness H of the middle plate body is 30-35mm.

[0008] Furthermore, the middle plate body is cast from aluminum-carbon refractory material.

[0009] Furthermore, the included angle α is 33°.

[0010] Furthermore, the length of the middle plate body is 385-390mm and the width is 195-200mm.

[0011] Furthermore, the length L of the middle plate body is 388mm, the width M is 198mm, and the thickness H is 32mm.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1) By cutting a 33° thinning groove in the thickness direction of the medium plate, the resistance of the steel flow channel is greatly reduced, the accumulation of inclusions is significantly reduced, thereby greatly reducing the accumulation of inclusions on the surface of the medium plate, changing the original flow obstruction state of the molten steel, delaying the time of nozzle blockage, increasing the number of consecutive castings by 4 to 5 heats, and also improving product quality.

[0014] 2) According to preliminary statistics, without considering the impact of continuous casting on costs, each additional continuous casting furnace will save approximately 3 million yuan in costs annually, creating considerable economic benefits for society. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0016] Figure 2 yes Figure 1 Sectional view along line AA;

[0017] In the diagram: 1-middle plate body, 2-middle hole, 3-thinning groove. Detailed Implementation

[0018] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the specific embodiments used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the specific embodiments described below are some embodiments of this utility model. For those skilled in the art, other specific embodiments can be obtained based on these specific embodiments without creative effort.

[0020] The components of the present invention described and shown in the specific embodiments herein can be arranged and designed in numerous different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the specific embodiments is not intended to limit the scope of the claimed invention, but only to illustrate selected embodiments of the invention.

[0021] See Figure 1-2This is a schematic diagram of the middle plate structure of a middle plate slide of this utility model. The middle plate body 1 has a central hole 2, and a thinning groove 3 is provided on the upper surface of the middle plate body 1. The thinning groove 3 is located on the side of the central hole 2 facing the small end of the middle plate body 1. The diameter D of the thinning groove 3 is the same as that of the central hole 2. The length l of the thinning groove 3 is 55-60mm. The angle α between the bottom of the groove and the upper surface is 30-35°, preferably 33°. The distance h from the bottom of the groove and the central hole 2 to the lower surface of the middle plate body 1 is 15-18mm to ensure that the refractory material is not corroded during steel casting, thus ensuring the safety of steel casting. The middle plate body 1 is cast from aluminum-carbon refractory material. The inner wall surface of the thinning groove 3 is smooth and without holes.

[0022] To ensure safe and stable steel pouring, a large-side flow control method is required when using automatic liquid level control on the slide plate. Simultaneously, to prevent severe erosion of the slide plate during pouring, the residual thickness of the grooved portion in the plate must be greater than 15mm.

[0023] The length L of the middle plate body 1 is 385-390mm, and the width M is 195-200mm. The thickness H of the middle plate body 1 is 30-35mm. The diameter D of the middle hole 2 is 65±1mm. Preferably, the length L of the middle plate body 1 is 388mm, the width M is 198mm, and the thickness H is 32mm.

[0024] The slope of the bottom of the thinning trough 3 reduces the accumulation of inclusions at this point. After the improvement, the molten steel flows through without obstruction, and the steel flows smoothly here, making it less likely for inclusions to accumulate, thus alleviating the blockage of the nozzle.

[0025] Preliminary statistics show that, without considering the impact of continuous casting on costs, each additional heat in continuous casting will save approximately 3 million yuan annually. This redesign of the middle plate will reduce the accumulation of inclusions in the middle plate, delay the formation time of inclusions, thereby alleviating blockages in the casting process, increasing the number of continuous castings by approximately 5 heats, improving product quality, and creating greater economic benefits.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mid-plate structure for a mid-mounted skateboard, comprising a mid-plate body, wherein the mid-plate body has a central hole, characterized in that, The upper surface of the middle plate body is provided with a thinning groove, which is located on the side of the middle hole facing the small end of the middle plate body. The diameter of the thinning groove is the same as that of the middle hole, the length l of the thinning groove is 55-60mm, the angle α between the bottom of the groove and the upper surface is 30-35°, and the distance h from the intersection line of the bottom of the groove and the middle hole to the lower surface of the middle plate body is 15-18mm. The inner wall surface of the thinning groove is smooth and without holes.

2. The middle plate structure of a middle-mounted sliding plate according to claim 1, characterized in that, The diameter D of the central hole is 65±1mm.

3. The middle plate structure of a middle-mounted sliding plate according to claim 1, characterized in that, The thickness H of the middle plate body is 30-35mm.

4. The middle plate structure of a middle-mounted sliding plate according to claim 1, characterized in that, The middle plate body is cast from aluminum-carbon refractory material.

5. The middle plate structure of a middle-mounted sliding plate according to claim 1, characterized in that, The included angle α is 33°.

6. The middle plate structure of a middle-mounted sliding plate according to claim 3, characterized in that, The length of the middle plate body is 385-390mm and the width is 195-200mm.

7. The middle plate structure of a middle-mounted sliding plate according to claim 6, characterized in that, The length L of the middle plate body is 388mm, the width M is 198mm, and the thickness H is 32mm.

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