A new type of sealing device for moulded runner brick

Abstract

The utility model relates to the technical field of steelmaking mould casting, and proposes a novel mould casting molten steel brick sealing device, which comprises: a ingot mould base and a steel pouring mould arranged in the center of the ingot mould base, a plurality of grooves are arranged on the upper surface of the ingot mould base, a plurality of molten steel bricks are arranged in any groove, a joint is left between adjacent molten steel bricks, a sealing block is bonded to the upper surface of the joint, a tail brick is arranged at the tail end of any groove, an upward hole is arranged on the upper surface of the tail brick, a sealing ring is bonded to the upper surface of the tail brick, a steel pouring opening is arranged at the upper end of the steel pouring mould, and a sealing strip is bonded to the outer side of the steel pouring opening. The novel mould casting molten steel brick sealing device makes the small and light ceramic fiber sealing element have strong fixity during the production process, plays a sealing protection role throughout the whole process, does not release any toxic substances at high temperature, does not contain asbestos and polybrominated diphenyl. After using the ceramic fiber, there is only a little steel penetration at the joint, and the molten steel running accident is zero.

Description

Technical Field

[0001] This utility model relates to the field of steelmaking die casting technology, specifically to a novel die casting flow steel brick sealing device. Background Technology

[0002] Ingot casting is a traditional steelmaking process. Due to the difficulty of continuous casting for certain special steel grades, many steel companies still maintain a certain level of ingot casting production. Ingot casting production mainly relies on tooling components and flow block masonry to construct the gating system. In bottom casting, qualified molten steel is poured through a central chute and flow block into the ingot mold from the bottom, where it solidifies to form a solid steel ingot with a good surface, clean interior, uniformity, and density. Flow blocks are hollow refractory bricks, also known as flow blocks, that connect the central brick and the ingot mold in the grooves of the ingot base plate. To achieve optimal yield, steel mills use various ingot shapes to meet different finished product specifications, inevitably resulting in combinations of relatively short flow blocks to accommodate different ingot casting requirements. Therefore, the ingot casting flow block system has many brick joints, which become the weakest point in the entire flow block system.

[0003] During the casting process, molten steel entering the casting slab can easily lead to steel leakage at the joints of the slabs and the bottom of the mold, causing steel spillage accidents. In severe cases, the entire batch of molten steel will be scrapped, resulting in significant cost waste and on-site safety hazards. In recent years, due to overcapacity in the steel industry and increasingly fierce market competition, the production costs of most domestic steel companies have become excessively high. Therefore, improving the quality of mold casting assembly and reducing on-site scrap have become one of the main research directions for technical personnel in steel companies.

[0004] In traditional die casting assembly of the base plate, refractory mortar is applied to the joints of the steel flow bricks. Two steel flow bricks are joined at the tenon joint, and the joint is filled with refractory mortar to ensure a tight seal between the steel flow bricks. Several asbestos ropes are wrapped around the riser hole of the tail brick between the base plate and the bottom of the ingot mold. After the ingot is assembled to the base plate, a tight fit between the base plate and the ingot mold is ensured, preventing steel from slipping from the base plate and the bottom of the mold. However, due to varying skill levels among on-site workers, moisture seeping into the steel flow bricks with the refractory mortar, uneven application of the refractory mortar, and uneven wrapping of the asbestos ropes, the quality of die casting assembly can fluctuate, easily leading to steel slippage accidents or quality accidents caused by refractory mortar contamination of the molten steel.

[0005] In view of this, the present invention proposes a novel sealing device for molded steel bricks. Utility Model Content

[0006] This utility model proposes a novel sealing device for cast steel bricks, which solves the problem in existing technologies where molten steel easily seeps into the joints of the cast steel bricks and the bottom of the mold after entering the casting process, causing steel leakage accidents. In severe cases, the entire batch of molten steel will be scrapped, resulting in serious cost waste and on-site safety hazards.

[0007] The technical solution of this utility model is as follows: A novel sealing device for flowable steel bricks in ingot casting, comprising a steel ingot mold base and a steel injection mold disposed in the center of the steel ingot mold base, characterized in that the upper surface of the steel ingot mold base is arrayed with multiple grooves, each groove contains multiple flowable steel bricks, and a joint is left between adjacent flowable steel bricks, with a sealing block adhered to the upper surface of the joint, a tail brick is provided at the tail end of each groove, a rising hole is provided on the upper surface of the tail brick, a sealing ring is adhered to the upper surface of the tail brick, and a steel injection port is provided at the upper end of the steel injection mold, with a sealing strip adhered to the outer side of the steel injection port.

[0008] Preferably, adhesive is provided on one side of the sealing block, sealing ring and sealing strip, and the sealing block completely covers the joint.

[0009] Preferably, the sealing block, sealing ring, and sealing strip are all made of ceramic fiber.

[0010] Preferably, the injection mold is a hollow cylinder, and the outer side of the injection port is chamfered.

[0011] Preferably, the sealing strip is arc-shaped and completely covers the chamfer on the outside of the injection port.

[0012] Preferably, the sealing ring has a through hole in the middle, and the through hole corresponds to the rising hole.

[0013] The working principle and beneficial effects of this utility model are as follows: 1. Specially treated ceramic fibers have a specific gravity at certain temperatures and inherent adhesive properties on their surface, giving the compact and lightweight ceramic fiber seals strong stability during the production process and solving the quality problem of molten steel contamination caused by the fluidity of refractory mortar.

[0014] 2. The sealing blocks, sealing rings, and sealing strips are all made of ceramic fiber. Its thermal conductivity at room temperature (25℃) is 0.015 W / (mK), and at 600℃ it is 0.030 W / (mK). Compared with commonly used insulation materials, this material improves insulation performance by 2 to 10 times. Excellent insulation ensures the fluidity of molten steel in the steel flow system during the casting process, resulting in a smoother casting process and further reducing the risk to steel ingot quality. It can withstand long-term use up to 900℃, and composite structures with other ceramic fiber products can reach 1700℃. The temperature of molten steel in the flow system is generally below 1500℃, and the casting time is generally less than 1 hour. Under these conditions, the shape and performance of the ceramic fiber are maintained, providing a sealing and protective function throughout the process. It does not release any toxic substances at high temperatures and is free of asbestos and polybrominated biphenyls. This ensures the physical and mental health of employees during the construction, casting, and cleaning processes. After using ceramic fiber, only a small amount of steel seepage occurs at the joints, and there are zero steel leakage accidents. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a cross-sectional view of the injection mold proposed in this utility model; Figure 3 This is a plan view of the sealing strip proposed in this utility model; In the diagram: 1. Steel ingot mold base; 2. Steel injection mold; 3. Groove; 4. Flowing steel brick; 5. Joint; 6. Sealing block; 7. Tail brick; 8. Rising hole; 9. Sealing ring; 10. Steel injection port; 11. Sealing strip. Detailed Implementation

[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0018] Please see Figure 1 , Figure 2 as well as Figure 3A novel sealing device for molten steel bricks in ingot casting includes: a steel ingot mold base 1 and a steel injection mold 2 disposed in the center of the steel ingot mold base 1. Multiple grooves 3 are arrayed on the upper surface of the steel ingot mold base 1. Multiple molten steel bricks 4 are disposed in any groove 3, with joints 5 between adjacent molten steel bricks 4. A sealing block 6 is adhered to the upper surface of the joint 5. A tail brick 7 is disposed at the tail end of each groove 3. An ascending hole 8 is disposed on the upper surface of the tail brick 7, and a sealing ring 9 is adhered to the upper surface of the tail brick 7. A steel injection port 10 is disposed at the upper end of the steel injection mold 2, and a sealing strip 11 is adhered to the outer side of the steel injection port 10. The steel injection mold 2 is a hollow cylinder, and molten steel enters the device through the steel injection port 10, which has a chamfered outer side. The sealing strip 11 is arc-shaped and completely covers the chamfered outer side of the steel injection port 10. A through hole is formed in the middle of the sealing ring 9, corresponding to the ascending hole 8.

[0019] Furthermore, adhesive is provided on one side of the sealing block 6, sealing ring 9, and sealing strip 11. The sealing block 6 completely covers the joint 5, and its self-adhesive function greatly improves the ease of operation. The specially treated ceramic fiber has a specific gravity at a certain temperature and its surface has self-adhesive properties, which makes the small and lightweight ceramic fiber sealant have strong fixation during the production process, solving the quality problem of molten steel contamination caused by the fluidity of refractory clay.

[0020] The sealing block 6, sealing ring 9, and sealing strip 11 are all made of ceramic fiber. Its thermal conductivity at room temperature (25℃) is 0.015 W / (mK), and at 600℃ it is 0.030 W / (mK). Compared with commonly used insulation materials, this material improves insulation performance by 2 to 10 times. This excellent insulation ensures the fluidity of molten steel in the steel flow system during the casting process, resulting in a smoother casting process, further reducing the risk to steel ingot quality. It can withstand long-term use up to 900℃, and composite structures with other ceramic fiber products can reach 1700℃. The temperature of molten steel in the flow system is generally below 1500℃, and the casting time is generally less than 1 hour. Under these conditions, the shape and performance of the ceramic fiber are maintained, providing a sealing and protective function throughout the process. It does not release any toxic substances at high temperatures and is free of asbestos and polybrominated biphenyls. This ensures the physical and mental health of employees during the construction, casting, and cleaning processes.

[0021] Working principle and usage process: During operation, molten steel enters the device through the steel injection port 10, flows sequentially through the steel injection mold 2 and the steel flow brick 4, and finally passes through the rising hole 8 to determine whether the injection is complete. The sealing block 6 is made of 150×50×5mm ceramic fiber, and the sealing ring 9 is made of 200×200mm ceramic fiber with a center hole diameter of 60mm. The sealing strip 11 is arc-shaped. The sealing block 6 is pasted on the outer surface of the joint 5 of the steel flow brick 4, so that the sealing block 6 can completely cover the joint 5. The sealing strip 11 is pasted at the steel injection port 10, and the sealing ring 9 is pasted at the rising hole 8 of the tail brick 7. The sealing ring 9 does not cover the rising hole 8.

[0022] Compared with sealing materials made of refractory mortar, asbestos rope and ceramic fiber, the use of ceramic fiber resulted in only a small amount of steel seepage at the joints, with zero steel leakage accidents.

[0023] As shown in the table above, after the sealing block 6, sealing ring 9 and sealing strip 11 made of ceramic fiber material are put into use, the steel penetration rate of the joint is only 0.2% and the steel run-out rate is 0%.

[0024] The use of this material in the die casting system brings about a revolutionary upgrade, providing technical support to steel companies in terms of safety, quality, and environmental protection.

[0025] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A novel sealing device for cast steel bricks, comprising: The steel ingot mold base (1) and the steel injection mold (2) set in the center of the steel ingot mold base (1) are characterized in that the upper surface of the steel ingot mold base (1) is provided with a plurality of grooves (3), a plurality of steel flow bricks (4) are provided in any groove (3), a joint (5) is left between adjacent steel flow bricks (4), a sealing block (6) is bonded to the upper surface of the joint (5), a tail brick (7) is provided at the tail end of any groove (3), an ascending hole (8) is provided on the upper surface of the tail brick (7), a sealing ring (9) is bonded to the upper surface of the tail brick (7), and a steel injection port (10) is provided at the upper end of the steel injection mold (2), a sealing strip (11) is bonded to the outer side of the steel injection port (10). The sealing block (6), sealing ring (9) and sealing strip (11) are all made of ceramic fiber.

2. The novel die-cast steel brick sealing device according to claim 1, characterized in that, The sealing block (6), sealing ring (9) and sealing strip (11) are all provided with adhesive on one side, and the sealing block (6) completely covers the joint (5).

3. The novel die-cast steel brick sealing device according to claim 1, characterized in that, The injection mold (2) is a hollow cylinder, and the outer side of the injection port (10) is chamfered.

4. The novel die-cast steel brick sealing device according to claim 3, characterized in that, The sealing strip (11) is arc-shaped and completely covers the chamfer on the outside of the injection port (10).

5. A novel sealing device for cast steel bricks according to claim 1, characterized in that, The sealing ring (9) has a through hole in the middle, which corresponds to the rising hole (8).

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