Drying and preheating equipment for blast furnace smelting iron ore
By combining a servo motor-driven shaft rotation system with heating elements and a fan, the problem of low ore drying and preheating efficiency in blast furnace ironmaking is solved, achieving efficient ore preheating and avoiding uneven temperature and agglomeration/blockage.
Patent Information
- Application Number
- CN202520251458.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-02-18
AI Technical Summary
In the current blast furnace ironmaking process, the ore drying and preheating methods are singular, resulting in low drying temperatures and long drying times, which easily leads to uneven furnace temperatures and agglomeration and blockage.
A servo motor-driven shaft rotation system, combined with heating elements and a fan, preheats the ore multiple times through the combined use of a heat-conducting shell, heat transfer plate, and heating wire, thereby improving drying efficiency.
By using multiple preheating methods, the drying efficiency of the ore is significantly improved, avoiding problems such as uneven temperature and clumping, and ensuring a uniform temperature distribution inside the furnace.
Smart Images
Figure CN223705673U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of blast furnace ironmaking technology, and in particular to a blast furnace ironmaking ore drying and preheating device. Background Technology
[0002] During blast furnace ironmaking, the ore typically contains a certain amount of moisture. If it is not dried, the moisture will vaporize at high temperatures, leading to uneven temperatures within the furnace and potentially causing agglomeration and blockage. Therefore, the main function of the drying and preheating stage is to initially dry and preheat the powdered pig iron ore and sintered ore, evaporating the moisture to ensure a uniform temperature distribution within the furnace.
[0003] For example, a Chinese patent discloses a blast furnace iron ore drying and preheating device (publication number CN216011778U). This patented technology turns on the heating wire and the first fan by connecting an external power source. The first fan starts to introduce air into the outer shell. When the air is introduced, it preheats the ore in the second fixed tube and the first fixed tube to heat and dry it. However, the drying and preheating method is limited to using hot air, which is a single drying method and is prone to problems such as low furnace temperature and long furnace drying time. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a blast furnace iron ore drying and preheating device, which solves the problems mentioned in the background.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a blast furnace iron ore drying and preheating device, including a drying box, bearing seats embedded on both sides of the drying box, a shaft rotatably connected inside a pair of bearing seats, a plurality of heat-conducting shells circumferentially connected to the outer side of the shaft inside the drying box, a drive mechanism provided at the left end of the shaft, a pair of outer shells correspondingly connected to the top of the drying box, and a fan and an electric heating wire respectively connected from top to bottom inside the outer shell;
[0006] The drying oven has ventilation holes on both the left and right sides;
[0007] The bottom of the drying oven is connected to four support frames.
[0008] As a further technical solution of this utility model, an electric heating element is connected to the middle position inside the heat-conducting shell, and heat transfer plates are connected to both the upper and lower sides of the electric heating element inside the heat-conducting shell.
[0009] As a further technical solution of this utility model, the driving mechanism includes a servo motor, one side of which is fixedly connected to a support frame, one end of the output shaft of the servo motor is connected to a first pulley, a belt is sleeved on the outer side of the first pulley, a second pulley is connected to the inner side of the belt, and the inner side of the second pulley is fixedly connected to a shaft.
[0010] As a further technical solution of this utility model, the outer side of the drying box is provided with a feed hole and a discharge hole, and a guide mechanism is connected to the outer side of the drying box near the feed hole and the discharge hole. The outer side of the drying box is slidably connected to a first sealing plate and a second sealing plate through a pair of guide mechanisms.
[0011] As a further technical solution of this utility model, the guiding mechanism includes a pair of slide rails, a slider is slidably connected to the inner side of the slide rails, and one side of the slider is fixedly connected to the second sealing plate.
[0012] As a further technical solution of this utility model, a filter screen is connected inside the vent hole.
[0013] This utility model provides a drying and preheating device for blast furnace iron ore, which has the following advantages compared with the prior art:
[0014] This design discloses a blast furnace iron ore drying and preheating device. By activating a servo motor, the first pulley rotates. The connection between the first pulley, the belt, and the second pulley facilitates the rotation of the shaft, which in turn rotates the heat-conducting shell outside the shaft. Simultaneously, the heating elements are activated, and heat is easily dissipated through the heat transfer plate to preheat the ore outside the heat-conducting shell. At the same time, a pair of heating wires and a fan at the top of the drying chamber are activated to easily introduce hot air into the drying chamber, completing a secondary preheating of the ore outside the heat-conducting shell. This significantly improves drying efficiency and solves the problems of relying solely on hot air for drying and preheating, which results in a single drying method and tends to lead to low furnace temperatures and long drying times. Attached Figure Description
[0015] Figure 1 This is one of the schematic diagrams of the overall structure of a blast furnace iron ore drying and preheating equipment;
[0016] Figure 2 This is one of the schematic diagrams of the overall structure of a blast furnace iron ore drying and preheating equipment;
[0017] Figure 3 This is one of the side sectional views of the drying box in a blast furnace iron ore drying and preheating equipment;
[0018] Figure 4 This is the second side sectional view of the drying box in a blast furnace iron ore drying and preheating equipment;
[0019] Figure 5 This is a side sectional view of the heat-conducting shell in a blast furnace iron ore drying and preheating device.
[0020] In the diagram: 1. Outer shell; 2. Slide rail; 3. Drying oven; 4. Support frame; 5. Belt; 6. Servo motor; 7. First pulley; 8. Vent hole; 9. Shaft; 10. Second pulley; 11. Fan; 12. First sealing plate; 13. Second sealing plate; 14. Heat-conducting shell; 15. Heating element; 16. Filter screen; 17. Heat transfer plate; 18. Heating wire; 19. Bearing seat; 20. Discharge hole; 21. Feed hole; 22. Slider. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0022] Please see Figures 1 to 5 This utility model provides a technical solution for drying and preheating equipment for blast furnace iron ore: it includes a drying box 3, with bearing seats 19 embedded on both sides of the drying box 3. A shaft 9 is rotatably connected inside a pair of bearing seats 19. Several heat-conducting shells 14 are circumferentially connected to the outside of the shaft 9 inside the drying box 3. A drive mechanism is provided at the left end of the shaft 9. A pair of outer shells 1 are correspondingly connected to the top of the drying box 3. A fan 11 and an electric heating wire 18 are respectively connected from top to bottom inside the outer shell 1. Turning on the pair of electric heating wires 18 and the fan 11 at the top of the drying box 3 facilitates the introduction of hot air into the drying box 3 to complete the secondary preheating of the ore outside the heat-conducting shells 14. Four support frames 4 are connected to the bottom of the drying box 3.
[0023] like Figure 3 As shown, an electric heating element 15 is connected to the middle of the interior of the heat-conducting shell 14. Heat transfer plates 17 are connected to both the interior of the heat-conducting shell 14 and the upper and lower sides of the electric heating element 15. When the electric heating element 15 is turned on, the heat is easily discharged through the heat transfer plates 17 to preheat the ore on the outside of the heat-conducting shell 14.
[0024] like Figure 1As shown, the drive mechanism includes a servo motor 6. One side of the servo motor 6 is fixedly connected to the support frame 4. One end of the output shaft of the servo motor 6 is connected to a first pulley 7. A belt 5 is sleeved on the outer side of the first pulley 7. A second pulley 10 is connected to the inner side of the belt 5. The inner side of the second pulley 10 is fixedly connected to the shaft 9. By turning on the servo motor 6, the first pulley 7 is driven to rotate. Through the connection between the first pulley 7, the belt 5, and the second pulley 10, the shaft 9 is easily driven to rotate, thereby driving the heat-conducting shell 14 on the outer side of the shaft 9 to rotate, preheating the ore on the outer side of the heat-conducting shell 14.
[0025] like Figures 1 to 4 As shown, the outer side of the drying chamber 3 is provided with a feed hole 21 and a discharge hole 20. The outer side of the drying chamber 3 is connected to a guide mechanism near the feed hole 21 and the discharge hole 20. The outer side of the drying chamber 3 is slidably connected to a first sealing plate 12 and a second sealing plate 13 through a pair of guide mechanisms. When it is necessary to add material, the ore can be easily added into the drying chamber 3 by sliding the first sealing plate 12. Similarly, after drying is completed, the ore can be easily discharged by sliding the second sealing plate 13.
[0026] like Figures 1 to 4 As shown, the guide mechanism includes a pair of slide rails 2, with a slider 22 slidably connected to the inner side of the slide rails 2. One side of the slider 22 is fixedly connected to the second sealing plate 13. The connection between the slide rails 2 and the slider 22 facilitates the left and right sliding of the first sealing plate 12 and the second sealing plate 13.
[0027] like Figure 3 As shown, ventilation holes 8 are provided on both the left and right sides of the drying oven 3. A filter screen 16 is connected inside the ventilation hole 8, which helps to prevent the ore from leaking out from the inside of the ventilation hole 8.
[0028] The working principle of this utility model is as follows: by turning on the servo motor 6, the first pulley 7 is driven to rotate. Through the connection between the first pulley 7, the belt 5 and the second pulley 10, the shaft 9 is easily driven to rotate, which in turn drives the heat-conducting shell 14 on the outside of the shaft 9 to rotate. At the same time, the heating element 15 is turned on, and the heat is easily discharged through the heat transfer plate 17 to preheat the ore on the outside of the heat-conducting shell 14. At the same time, a pair of heating wires 18 and a fan 11 at the top of the drying chamber 3 are turned on to easily introduce hot air into the drying chamber 3, completing the secondary preheating of the ore on the outside of the heat-conducting shell 14, which greatly improves the drying efficiency.
[0029] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.
Claims
1. A drying and preheating device for blast furnace iron ore, characterized in that, include: Drying oven (3), bearing seats (19) are embedded on both sides of the drying oven (3), and a shaft (9) is rotatably connected inside the pair of bearing seats (19). Several heat-conducting shells (14) are circumferentially connected to the outside of the shaft (9) inside the drying oven (3). A drive mechanism is provided at the left end of the shaft (9). A pair of outer shells (1) are connected to the top of the drying oven (3). A fan (11) and a heating wire (18) are connected from top to bottom inside the outer shell (1). Ventilation holes (8) are provided on both the left and right sides of the drying oven (3); The bottom of the drying oven (3) is connected to four support frames (4).
2. The blast furnace iron ore drying and preheating equipment according to claim 1, characterized in that, The heat-conducting shell (14) is connected to the middle of the interior of the heating element (15), and heat transfer plates (17) are connected to the interior of the heat-conducting shell (14) and on both the upper and lower sides of the heating element (15).
3. The blast furnace iron ore drying and preheating equipment according to claim 1, characterized in that, The drive mechanism includes a servo motor (6), one side of which is fixedly connected to a support frame (4). One end of the output shaft of the servo motor (6) is connected to a first pulley (7), a belt (5) is sleeved on the outer side of the first pulley (7), and a second pulley (10) is connected to the inner side of the belt (5). The inner side of the second pulley (10) is fixedly connected to a shaft (9).
4. The blast furnace iron ore drying and preheating equipment according to claim 1, characterized in that, The drying box (3) has a feed hole (21) and a discharge hole (20) on its outer side. The outer side of the drying box (3) is connected to a guide mechanism near the feed hole (21) and the discharge hole (20). The outer side of the drying box (3) is slidably connected to a first sealing plate (12) and a second sealing plate (13) through a pair of guide mechanisms.
5. The blast furnace iron ore drying and preheating equipment according to claim 4, characterized in that, The guiding mechanism includes a pair of slide rails (2), with a slider (22) slidably connected to the inner side of the slide rails (2), and one side of the slider (22) is fixedly connected to the second sealing plate (13).
6. The blast furnace iron ore drying and preheating equipment according to claim 1, characterized in that, A filter screen (16) is connected inside the vent (8).