Blast furnace tuyere for developing two airflows in edge
By designing the tuyeres and tuyeres structure, and using high-temperature alloy balls to control the airflow intensity, the problem of traditional blast furnace tuyeres being unable to adjust the airflow at the edges and center has been solved, thus improving the flexibility and efficiency of blast furnace operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANGANG STEEL CO LTD
- Filing Date
- 2025-04-27
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional blast furnace tuyeres cannot effectively regulate the airflow between the side and the center, resulting in delayed and unreliable airflow regulation, which affects the operating efficiency of the blast furnace.
A blast furnace tuyere with two airflows at the edges and center is designed. It consists of a tuyere body, horizontal and vertical tuyeres, a tuyer cap, and high-temperature alloy balls. The airflow intensity is controlled by opening and closing the tuyeres, thereby achieving direct adjustment of the airflow at the edges.
It improved gas utilization, reduced blast furnace fuel consumption, lowered edge dead zones, and enhanced the flexibility and efficiency of blast furnace operation.
Smart Images
Figure CN224148084U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of blast furnace ironmaking technology, and more specifically, to a blast furnace tuyer with two airflows running through the sides and center. Background Technology
[0002] The blast furnace air supply system consists of hot blast duct, hot blast branch duct, air duct, tuyere and other equipment. The traditional tuyere is a through-type single outlet mode, where hot blast enters from the inlet end and flows out from the outlet end. It cannot regulate the airflow between the side and the middle. At present, the main operation is to adjust the upper charging system, but the effect of adjusting the upper system on the airflow has a certain delay and is unreliable. Utility Model Content
[0003] To address the aforementioned technical issues, a blast furnace tuyere with two airflow streams (one on the side and one in the center) is provided.
[0004] The technical means adopted in this utility model are as follows:
[0005] A blast furnace tuyere for developing two airflows from the side and center includes: a tuyere body, one side of which is an air inlet connected to a blast furnace air supply system; the interior of the tuyere body has a horizontal air outlet; the upper side wall of the tuyere body has a vertical air outlet communicating with the horizontal air outlet; an air cap is fixedly connected to the vertical air outlet; the interior of the air cap is communicating with the horizontal air outlet; an air hole is opened on the side wall of the air cap extending outside the tuyere body; the air hole is communicating with the interior of the air cap; and the air hole has an opening and closing function.
[0006] The air vent body has a cooling water pipe inside its side wall. The end face of the air vent body on the same side as the air inlet has a water inlet and a water outlet that are connected to the cooling water pipe. The water inlet and water outlet are located on both sides of the horizontal air outlet. The water inlet and water outlet are respectively connected to the water inlet pipe and the water outlet pipe.
[0007] Furthermore, the wind cap includes a wind cap body, a wind cap head, and a high-temperature resistant alloy ball. The wind cap body is fixedly connected to a vertical air outlet. The wind cap head is fixedly connected to the wind cap body and located outside the air outlet body. The wind cap body has a vertical air duct inside that communicates with a horizontal air outlet. The wind cap head is connected to the vertical air duct inside. The air hole is opened on the side wall of the wind cap head. The high-temperature resistant alloy ball is movably disposed inside the wind cap head. The opening and closing of the air hole is achieved by the movement of the high-temperature resistant alloy ball.
[0008] Furthermore, the hood head and the hood body are integrally connected at a certain angle, and the center line of the hood head is set at an angle to the center line of the vertical air duct.
[0009] Furthermore, the hood head is tilted relative to the hood body towards the air inlet end, and the air vent is opened on the side wall of the hood head away from the air inlet end.
[0010] Furthermore, the main body of the hood is welded to the vertical air outlet.
[0011] Furthermore, the hood body is threadedly connected to the vertical air outlet, wherein the outer wall of the hood body has an external thread, the inner wall of the vertical air outlet has an internal thread, and the internal thread and the external thread are engaged and connected.
[0012] Furthermore, the diameter of the vertical air duct is smaller than the diameter of the high-temperature alloy ball, and the inner diameter of the hood head is larger than the diameter of the high-temperature alloy ball.
[0013] Furthermore, both the high-temperature alloy ball and the wind cap are made of high-temperature ceramic.
[0014] Compared with the prior art, the present invention has the following advantages:
[0015] This utility model provides a blast furnace tuyere with two airflows at the edge and center. By innovating the tuyere outlet method, it adds an upper air outlet cap to the traditional tuyere and controls the timing of edge airflow enhancement and edge-center airflow intensity through the setting of high-temperature alloy balls and air holes. This achieves the purpose of adjusting the edge airflow from the bottom of the blast furnace, which is conducive to improving gas utilization, reducing edge dead zones, and reducing blast furnace fuel consumption.
[0016] Based on the above reasons, this utility model can be widely promoted in fields such as blast furnace ironmaking. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of this utility model.
[0019] In the diagram: 1. Air inlet; 2. Horizontal air outlet; 3. High-temperature alloy ball; 4. Air cap; 4-1. Air cap head; 4-2. Vertical air duct; 5. Cooling water pipe; 6. Air hole; 7. Vertical air outlet. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0021] Example 1
[0022] This invention provides a blast furnace tuyere that develops two airflow paths, one on the side and one in the center, and relates to a blast furnace air supply system. This invention innovates the tuyere's air outlet method by adding an upper air outlet cap to the traditional tuyere. Through the use of high-temperature alloy balls and air holes, it controls the intensity of the airflow on the side and in the center, facilitating direct adjustment of the blast furnace gas flow direction from the bottom.
[0023] The blast furnace tuyeres of this invention, which have two airflows, include: a tuyer body, an air inlet 1, a horizontal air outlet 2, a high-temperature alloy ball 3, an air cap 4, a cooling water pipe 5, an air hole 6, and a vertical air outlet 7. One side of the tuyeres body is the air inlet 1, which is connected to the blast furnace air supply system (existing equipment). The interior of the tuyeres body has a horizontal air outlet 2. The upper side wall of the tuyeres body has a vertical air outlet 7 that communicates with the horizontal air outlet 2. An air cap 4 is fixedly connected to the vertical air outlet 7. The interior of the air cap 4 communicates with the horizontal air outlet 2. The side wall of the air cap 4 extending outside the tuyeres body has an air hole 6 that communicates with the interior of the air cap 4. The air hole 6 has an opening and closing function. The interior of the side wall of the tuyeres body is provided with a cooling water pipe 5. The end face of the tuyeres body on the same side as the air inlet 1 has a water inlet and a water outlet that communicate with the cooling water pipe 5. The water inlet and the water outlet are located on both sides of the horizontal air outlet 2. The water inlet and the water outlet are connected to the water inlet pipe and the water outlet pipe, respectively.
[0024] Example 2
[0025] Unlike Embodiment 1, in this embodiment, the hood 4 includes a hood body, a hood head 4-1, a vertical air duct 4-2, a high-temperature alloy ball 3, and air holes 6. The hood body is fixedly connected to the vertical air outlet 7. The hood head 4-1 is fixedly connected to the end of the hood body away from the horizontal air outlet 2, and the hood head 4-1 is located outside the air outlet body. The hood body has a vertical air duct 4-2 communicating with the horizontal air outlet 2 inside. The hood head 4-1 is connected to the vertical air duct 4-2 inside. The air holes 6 are opened on the side wall of the hood head 4-1. The high-temperature alloy ball 3 is movably disposed inside the hood head 4-1, and the opening and closing of the air holes 6 is achieved by the movement of the high-temperature alloy ball 3. The hood 4 does not require water cooling.
[0026] The hood head 4-1 is integrally connected to the hood body at a certain angle, and the center line of the hood head 4-1 is set at an angle to the center line of the vertical air duct 4-2. The hood head 4-1 is tilted relative to the hood body towards the air inlet end 1, and the air hole 6 is opened on the side wall of the hood head 4-1 away from the air inlet end 1.
[0027] The hood 4 is welded together with the vertical air outlet 7.
[0028] The diameter of the vertical air duct 4-2 is slightly smaller than the diameter of the high-temperature alloy ball 3, and the inner diameter of the hood head 4-1 is slightly larger than the diameter of the high-temperature alloy ball 3.
[0029] The high-temperature resistant alloy ball 3 inside the wind cap 4 can withstand a certain wind pressure. If the wind pressure is greater than this, the high-temperature resistant alloy ball 3 will be lifted up, and the wind will flow out from the wind hole 6. At this time, the airflow at the edge is strengthened. If the wind pressure is lower than this, the high-temperature resistant alloy ball 3 will fall down and block the wind hole 6, and the airflow at the edge will be weakened.
[0030] The blast furnace tuyeres of this utility model are installed during the blast furnace shutdown period. In the initial stage of air supply, the air pressure is low and hot air mainly flows into the furnace through the horizontal tuyer outlet 2. When the air pressure exceeds 200 kPa, the high-temperature alloy ball 3 will be lifted up and some air will flow into the air duct and out through the air hole 6. At this time, the edge airflow is directly strengthened.
[0031] Example 3
[0032] Unlike Embodiment 2, in this embodiment, the hood body and the vertical air outlet 7 are connected by threads, which facilitates installation. The outer wall of the hood body (the vertical part of the hood 4) is machined with external threads, and the inner wall of the vertical air outlet 7 is machined with internal threads. The internal and external threads mate to connect.
[0033] The wind cap 4 is made of high-temperature resistant alloy, and both the wind cap 4 and the high-temperature resistant alloy ball 3 are made of high-temperature resistant ceramic.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A blast furnace tuyeres that develop two airflows at the edges and center, characterized in that, include: The tuyer body has an air inlet (1) on one side, which is connected to the blast furnace air supply system. The tuyer body has a horizontal air outlet (2) inside. The upper side wall of the tuyer body has a vertical air outlet (7) that communicates with the horizontal air outlet (2). A wind cap (4) is fixedly connected in the vertical air outlet (7). The interior of the wind cap (4) communicates with the horizontal air outlet (2). The side wall of the wind cap (4) extending outside the tuyer body has a wind hole (6) that communicates with the interior of the wind cap (4). The wind hole (6) has an opening and closing function. The air vent body has a cooling water pipe (5) inside its side wall. The air vent body has an inlet end and an outlet end connected to the cooling water pipe (5) on the same side as the air inlet end (1). The inlet end and the outlet end are located on both sides of the horizontal air outlet (2). The inlet end and the outlet end are connected to the inlet pipe and the outlet pipe, respectively.
2. A blast furnace tuyere for developing two gas streams in a shaft as claimed in claim 1, characterized in that The wind cap (4) includes a wind cap body, a wind cap head (4-1), and a high-temperature alloy ball (3). The wind cap body is fixedly connected to the vertical air outlet (7). The wind cap head (4-1) is fixedly connected to the wind cap body and located outside the air outlet body. The wind cap body has a vertical air duct (4-2) that communicates with the horizontal air outlet (2). The wind cap head (4-1) communicates with the vertical air duct (4-2). The air hole (6) is opened on the side wall of the wind cap head (4-1). The high-temperature alloy ball (3) is movably disposed inside the wind cap head (4-1). The opening and closing of the air hole (6) is achieved by the movement of the high-temperature alloy ball (3).
3. A blast furnace tuyere for developing two gas streams in a shaft as claimed in claim 2, characterized in that The hood head (4-1) is integrally connected to the hood body at a certain angle, and the center line of the hood head (4-1) is set at an angle to the center line of the vertical air duct (4-2).
4. A blast furnace tuyere for developing two gas streams in a shaft as claimed in claim 3, characterized in that The hood head (4-1) is tilted relative to the hood body towards the air inlet end (1), and the air hole (6) is opened on the side wall of the hood head (4-1) away from the air inlet end (1).
5. A blast furnace tuyere for developing two gas streams in a shaft as claimed in claim 2, characterized in that The main body of the wind cap is welded to the vertical air outlet (7).
6. A blast furnace tuyere for developing two gas streams in a shaft as claimed in claim 2, characterized in that The wind cap body is threadedly connected to the vertical air outlet (7), wherein the outer wall of the wind cap body has an external thread, and the inner wall of the vertical air outlet (7) has an internal thread, and the internal thread and the external thread are connected in a mating manner.
7. A blast furnace tuyere for developing two gas streams in a shaft as claimed in claim 2, characterized in that The diameter of the vertical air duct (4-2) is smaller than the diameter of the high-temperature alloy ball (3), and the inner diameter of the hood head (4-1) is larger than the diameter of the high-temperature alloy ball (3).
8. The blast furnace tuyeres with two airflows on the sides as described in claim 2, characterized in that, The high-temperature resistant alloy ball (3) and the wind cap (4) are both made of high-temperature resistant ceramic.