Tundish side deslagging system
The tundish side slag removal system solves the problem of insufficient volume in blast furnace continuous casting using traditional slag removal methods, achieving convenient slag removal and stability of the continuous casting process, thereby improving production efficiency and cast steel quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 新疆伊犁钢铁有限责任公司
- Filing Date
- 2024-12-31
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional tundish slag removal methods in continuous casting production have drawbacks such as difficulty in slag removal and short service life, leading to problems with cast steel quality and production costs. Especially when the number of furnaces in continuous casting increases, the existing slag removal hopper volume is insufficient, and steel slag is easily sucked into the crystallizer, affecting quality.
The tundish side slag discharge system is adopted, which includes components such as a conical slag pan, overflow hopper, guide channel and lifting lug. Through the side slag discharge operation, the overflow hopper can be easily replaced and its volume expanded, ensuring that the steel slag is discharged smoothly and reducing the impact on the continuous casting process.
It improved production efficiency and cast steel quality, reduced unplanned downtime, ensured the stability and safety of the continuous casting process, and met the needs of continuous casting in blast furnaces.
Smart Images
Figure CN224222737U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of continuous casting technology, specifically to a tundish side slag removal system. Background Technology
[0002] In the continuous casting process of the metallurgical industry, the tundish is a key piece of equipment connecting the molten steel ladle and the crystallizer. Its functions include pressure reduction, flow stabilization, slag removal, temperature homogenization, flow diversion, and steel storage. Traditional tundish slag removal operations mostly adopt the post-impact zone slag removal method. This method has problems such as difficulty in slag removal, short service life, and significant impact on billet quality and continuous casting production costs. With the development of continuous casting production technology and the increase in output, long-life tundishes are widely used, but traditional slag removal methods can no longer meet the needs of modern continuous casting production.
[0003] The slag removal operation method after the impact zone of the tundish in the continuous casting process of the steel plant has successfully extended the service life of the tundish for continuous 24-hour steel casting, with a continuous casting heat count of up to 40 heats. As the number of heats cast in a continuous casting machine increases, the slag layer thickness in the tundish continues to increase. The traditional slag removal hopper has a volume of 3m³, which can meet the requirements under the condition of 40 heats cast in a continuous casting process. However, when the number of heats cast in a continuous casting process of the tundish increases to more than 80 heats, the existing slag removal hopper volume cannot meet the requirements of 80 heats. This results in excessively high molten steel levels, and the slag floating on the surface is sucked into the crystallizer, which also affects the quality of the cast steel. Utility Model Content
[0004] The purpose of this invention is to provide a tundish side slag removal system to address the problem that as the number of consecutive casting heats increases, the slag layer thickness in the tundish continuously increases. The traditional slag removal hopper has a volume of 3m³, which can meet the requirements when the number of consecutive casting heats in the tundish is 40. However, when the number of consecutive casting heats in the tundish is increased to more than 80, the existing slag removal hopper volume cannot meet the requirements for 80 heats, resulting in excessively high molten steel levels. The slag floating on the surface is sucked into the crystallizer, which also affects the quality of the cast steel.
[0005] To achieve the above objectives, the basic solution provided by this utility model is as follows: a tundish side slag discharge system, including a tundish body and a support platform, a conical slag pan connected to one side of the tundish body, a slag discharge nozzle connected to the conical slag pan, the slag discharge nozzle being located on one side of the conical slag pan, the support platform being fitted to the tundish body, an overflow hopper provided on the support platform, the overflow hopper being located below the slag discharge nozzle, and an overflow hopper nozzle connected to one side of the overflow hopper.
[0006] The principle and beneficial effects of this utility model are as follows: the original slag discharge operation at the back of the tundish is changed to slag discharge operation at the side of the impact zone, which makes the replacement of the overflow hopper simple and convenient. After the overflow hopper of the tundish is full, the ladle is turned to a horizontal position and then lifted out of the slag discharge position by a crane. This effectively solves the problem that steel slag in the tundish cannot be discharged due to the limited volume of the overflow hopper. At the same time, it may also reduce the impact on other casting processes, thereby improving the overall production efficiency and product quality. In the continuous production process, by monitoring the capacity of the overflow hopper in real time and replacing it in time, the stability of the continuous casting process is ensured and unplanned downtime caused by slag discharge problems is reduced.
[0007] Option 2, a preferred option of the basic scheme, has a guide channel fixed to one side of the support platform, located below the overflow hopper chute. The slag overflowing from the overflow hopper chute flows into the receiving tipper truck through the guide channel.
[0008] Option 3, an optimal choice from the basic option, features several lifting lugs on the overflow hopper. When the overflow hopper needs to be replaced, a lifting device is used to hook onto the lifting lugs and lift the overflow hopper.
[0009] Option 4, the preferred option of the basic scheme, uses steel plate as the material for the overflow hopper support platform. The support platform is welded from 25mm thick steel plate, a design that maximizes ease of operation and safety.
[0010] Option 5, a preferred option of the basic scheme, features support rods on both sides of the guide channel. A limiting rod 1 is positioned between the two support rods, and a connecting rod is fixed to the bottom of each support rod. Each connecting rod has a limiting rod 2, with the limiting rod 1 positioned above the limiting rod 2. The limiting rod 1 limits the head of the receiving dump truck, preventing it from tilting forward due to gravity. The limiting rod 2 limits the wheels of the receiving dump truck, preventing it from retracting.
[0011] Option 6, the preferred option from the basic option, has the following dimensions for the overflow hopper: 2.2m long, 1.8m wide, and 1.2m high. Increasing the capacity of the overflow hopper reduces the frequency of cleaning and stabilizes the process flow. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of a tundish side slag discharge system according to this utility model. Detailed Implementation
[0013] The present invention will be further described in detail below through specific embodiments:
[0014] The reference numerals in the accompanying drawings of the instruction manual include: 1. Tundish body, 2. Support platform, 3. Conical slag pan, 4. Slag discharge chute, 5. Overflow hopper, 6. Overflow hopper chute, 7. Guide channel, 8. Lifting lug, 9. Support rod, 10. Limiting rod one, 11. Connecting rod, 12. Limiting rod two.
[0015] Example
[0016] The implementation examples are basically as follows Figure 1 As shown: A tundish side slag discharge system includes a tundish body 1 and a support platform 2. A conical slag pan 3 is connected to one side of the tundish body 1, and a slag discharge nozzle 4 is connected to the conical slag pan 3. The slag discharge nozzle 4 is located on one side of the conical slag pan 3. The support platform 2 is made of steel plate and is fitted to the tundish body 1. An overflow hopper 5 is provided on the support platform 2, located below the slag discharge nozzle 4. The specifications of the overflow hopper 5 are: length 2.2m, width 1.8m, and height [not specified]. 1.2m, one side of the overflow hopper 5 is connected to the overflow hopper spout 6, one side of the support platform 2 is fixed to the guide channel 7, the guide channel 7 is located below the overflow hopper spout 6, the overflow hopper 5 is provided with several lifting lugs 8, the two sides of the guide channel 7 are provided with support rods 9, the two support rods 9 are provided with a limiting rod 10, the bottom of the two support rods 9 are fixed to the connecting rods 11, the two connecting rods 11 are provided with a limiting rod 2 12, the limiting rod 10 is located above the limiting rod 2 12.
[0017] The implementation method of this embodiment is as follows:
[0018] As the molten steel level in the tundish body 1 gradually rises, the steel slag floating on the surface accumulates towards the conical slag pan 3 due to gravity. After accumulating to a certain height, it flows out from the slag discharge spout 4 and into the overflow slag hopper 5. The steel slag continues to accumulate in the overflow slag hopper 5. After accumulating to a certain height, it flows out from the overflow slag hopper spout 6 and then flows through the guide channel 7 into the receiving tipper car. At this time, the first limiting rod 10 limits the head of the receiving tipper car to prevent it from falling forward or moving forward due to gravity. The second limiting rod limits the wheels of the receiving tipper car so that it can stay below the guide channel 7 and will not move arbitrarily.
[0019] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A tundish side slag discharge system, characterized in that, The tundish includes a tundish body (1) and a support platform (2). A conical slag pan (3) is connected to one side of the tundish body (1). A slag discharge nozzle (4) is connected to the conical slag pan (3). The slag discharge nozzle (4) is located on one side of the conical slag pan (3). The support platform (2) is attached to the tundish body (1). An overflow hopper (5) is provided on the support platform (2). The overflow hopper (5) is located below the slag discharge nozzle (4). An overflow hopper nozzle (6) is connected to one side of the overflow hopper (5).
2. The tundish-side slag discharge system according to claim 1, characterized in that, A guide channel (7) is fixedly connected to one side of the support platform (2), and the guide channel (7) is located below the overflow slag chute (6).
3. The tundish-side slag discharge system according to claim 1, characterized in that, The overflow hopper (5) is provided with several lifting lugs (8).
4. The tundish-side slag discharge system according to claim 1, characterized in that, The support platform (2) is made of steel plate.
5. A tundish-side slag discharge system according to claim 2, characterized in that, The guide channel (7) is provided with support rods (9) on both sides, and a limiting rod (10) is provided between the two support rods (9). A connecting rod (11) is fixed to the bottom of each of the two support rods (9), and a limiting rod (12) is provided on each of the two connecting rods (11). The limiting rod (10) is located above the limiting rod (12).
6. The tundish-side slag discharge system according to claim 1, characterized in that, The specifications of the overflow hopper (5) are: 2.2m long, 1.8m wide and 1.2m high.