Blast furnace long-time damping-down tuyere mud blocking structure
By using a ceramic refractory mud structure at the front and rear ends of the blast furnace tuyere, the problem of difficulty in clearing the tuyere in the traditional mud-blocking method was solved, achieving efficient and time-saving tuyere restoration and improving the blast furnace blasting efficiency.
Patent Information
- Application Number
- CN202422859572.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-11-22
AI Technical Summary
When the traditional method of blocking the tuyeres is not successful in blast furnace recovery, the refractory clay hardens after sintering, making it difficult to clear the tuyeres and affecting the blast furnace recovery process.
The structure uses refractory clay at the front and rear ends of the porcelain, and the porcelain is matched with the blast furnace tuyere sleeve. The refractory clay is pressed in to form a slurry-blocking structure, which simplifies the operation of clearing the tuyere.
It achieves 100% success rate in clearing blocked air vents in one go, reducing the labor intensity of workers and promoting the rapid recovery of blast furnace conditions.
Smart Images
Figure CN223496507U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a tuyere plugging structure for long-term shutdown of blast furnaces, belonging to the field of blast furnace ironmaking production technology in the metallurgical industry. Background Technology
[0002] In the production process of blast furnaces in metallurgical enterprises, planned shutdowns, unplanned shutdowns, shutdowns due to environmental protection response production restrictions, and shutdowns under various emergencies are unavoidable. In order to quickly restore the furnace condition after the blast furnace is blasted back on, a certain number of tuyeres are often temporarily blocked before the blast furnace is blasted back on, depending on the length of the shutdown.
[0003] The traditional method of blocking tuyeres involves sealing the front of the tuyere with a certain thickness of special refractory mud. After the blast furnace is blasted, the order and timing of unblocking the tuyere are determined according to the blast furnace blasting speed and the slag and iron discharge situation in front of the furnace. When the blast furnace recovery is not smooth or the blasting speed is slow, the refractory mud will harden and increase in strength after a long period of sintering at the front of the tuyere, which will greatly increase the difficulty and number of times to unblock the tuyere. In some cases, it may even be necessary to temporarily shut down the blast furnace to deal with the blocked tuyere, which seriously restricts the blast furnace blasting recovery process. Utility Model Content
[0004] The purpose of this invention is to provide a tuyere plugging structure for long-term shutdown of blast furnaces, which can clear the blocked tuyere in one go, saving time and effort, greatly reducing the labor intensity of workers when clearing the tuyere, and solving the problems existing in the background technology.
[0005] The technical solution of this utility model is:
[0006] A blast furnace tuyere plugging structure for long-term shutdown includes a blast furnace blower pipe and a large blast furnace tuyere sleeve, a middle blast furnace tuyere sleeve, and a small blast furnace tuyere sleeve that cooperate with the blast furnace blower pipe. Refractory clay for the front end of a porcelain piece, a porcelain piece, and refractory clay for the rear end of a porcelain piece are sequentially pressed into the small blast furnace tuyere sleeve.
[0007] The porcelain is a cylindrical structure, and its external dimensions match the size of the inner hole of the blast furnace tuyeres.
[0008] The porcelain is a porcelain bowl, the diameter of which matches the inner hole of the blast furnace tuyeres, and the bowl opening faces the front refractory clay.
[0009] The porcelain is a porcelain cup, the diameter of the cup mouth matches the size of the inner hole of the blast furnace tuyeres, and the cup mouth faces the front refractory clay.
[0010] The thickness of the refractory mortar at the front end and the refractory mortar at the rear end of the porcelain is 90-110mm.
[0011] The beneficial effects of this utility model are: after the blast furnace is blasted, the blocked tuyeres can be cleared in one go with a 100% success rate, saving time and effort and greatly reducing the labor intensity of workers when clearing the tuyeres. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model;
[0013] In the diagram: 1. Blast furnace blast blower; 2. Blast furnace tuyere sleeve; 3. Blast furnace tuyere middle sleeve; 4. Blast furnace tuyere small sleeve; 5. Refractory clay at the rear end of the porcelain bowl; 6. Porcelain; 7. Refractory clay at the front end of the porcelain bowl. Detailed Implementation
[0014] The present invention will be further described below with reference to the accompanying drawings and examples.
[0015] See attached document Figure 1 A blast furnace tuyere plugging structure for long-term shutdown includes a blast furnace blow pipe 1 and a blast furnace tuyere large sleeve 2, a blast furnace tuyere middle sleeve 3, and a blast furnace tuyere small sleeve 4 that cooperate with the blast furnace blow pipe 1. Refractory mud 7 for the front end of the porcelain, porcelain 6, and refractory mud 5 for the rear end of the porcelain are sequentially pressed into the blast furnace tuyere small sleeve 4. Example 1
[0016] See attached document Figure 1 Porcelain 6 is an ordinary porcelain bowl. During the sealing process, first, a 100mm thick layer of porcelain front refractory clay 7 is pressed into the front end of the small sleeve 4 of the air vent. Then, an ordinary porcelain bowl with a suitable diameter is used to press the porcelain front refractory clay 7 firmly. Finally, a 100mm thick layer of porcelain rear refractory clay 5 is pressed into the rear end of the ordinary porcelain bowl. Example 2
[0017] Porcelain 6 is an ordinary porcelain cup. During the sealing process, first, a 110mm thick layer of porcelain front refractory clay 7 is pressed into the front end of the small sleeve 4 of the air vent. Then, an ordinary porcelain cup with a suitable mouth diameter is used to press the porcelain front refractory clay 7 firmly. Finally, a 90mm thick layer of porcelain rear refractory clay 5 is pressed into the rear end of the ordinary porcelain cup.
[0018] In addition to ordinary porcelain bowls and cups, porcelain item 6 can also be other cylindrical porcelain items.
[0019] With this structure, workers can easily open the tuyeres with an iron rod, achieving a 100% success rate. This fundamentally avoids the problem of increased difficulty in opening tuyeres due to the increased strength and hardness of refractory mud after prolonged sintering time, which is a problem with traditional mud plugging. It is beneficial for the smooth resumption of air supply after the blast furnace is blasted and for the furnace condition to be restored quickly.
Claims
1. A blast furnace tuyere plugging structure for long-term shutdown, comprising a blast furnace blowdown pipe (1) and a blast furnace tuyere large sleeve (2), a blast furnace tuyere middle sleeve (3), and a blast furnace tuyere small sleeve (4) that cooperate with the blast furnace blowdown pipe (1), characterized in that: In the small sleeve (4) of the blast furnace tuyere, the refractory mortar (7) at the front end of the porcelain, the porcelain (6) and the refractory mortar (5) at the rear end of the porcelain are pressed in sequence.
2. The tuyere plugging structure for long-term shutdown of a blast furnace according to claim 1, characterized in that: The porcelain (6) is a columnar structure, and its external dimensions match the size of the inner hole of the blast furnace tuyeres (4).
3. The tuyere plugging structure for long-term shutdown of a blast furnace according to claim 2, characterized in that: The porcelain (6) is a porcelain bowl. The diameter of the bowl's mouth matches the size of the inner hole of the blast furnace tuyeres (4), and the bowl's mouth faces the front refractory clay (7).
4. The tuyere plugging structure for long-term shutdown of a blast furnace according to claim 2, characterized in that: The porcelain (6) is a porcelain cup. The diameter of the cup mouth matches the size of the inner hole of the blast furnace tuyeres sleeve (4), and the cup mouth faces the front refractory clay (7).
5. The tuyere plugging structure for long-term shutdown of a blast furnace according to claim 1, characterized in that: The thickness of the refractory mortar (7) at the front end and the refractory mortar (5) at the rear end of the porcelain is 90-110 mm.