A multi-stage mixing device for raw materials of a ladle slag line brick

Abstract

The utility model discloses a kind of steel ladle slag line brick raw material multi-stage mixing equipment, including support platform and stirring barrel, the top of the support platform is provided with stirring barrel, the top of the support platform of stirring barrel both sides is provided with second electric push rod, the top of the stirring barrel is provided with barrel cover, the output end of the second electric push rod is all installed with second push arm, and second push arm is connected with barrel cover, the top of the barrel cover is symmetrically provided with sieve box, the inner wall of the sieve box is all symmetrically provided with track, and sieve frame is all provided between two groups of tracks, the side of sieve frame close to track is all symmetrically provided with pulley, and sieve frame is slidably connected with track by pulley, the inner wall of sieve box on the side of sieve frame is all provided with third servo motor. The utility model not only realizes fine screening to raw material and uniform stirring to raw material, facilitates flexible adjustment to adapt to different conveying height, and improves the quality of raw material mixing and the convenience of material output.

Description

Technical Field

[0001] This utility model relates to the field of ladle slag line brick production technology, specifically a multi-stage mixing equipment for ladle slag line brick raw materials. Background Technology

[0002] In recent years, with the continuous development of high-alloy steel smelting technology, the requirements for the purity of molten steel have become increasingly stringent, refining time has been significantly extended, and the content of oxygen, sulfur, and inclusions in the steel needs to be controlled at extremely low levels. To achieve this goal, a refining slag system with high basicity, low melting point, and high fluorine content is commonly used. However, this slag system severely corrodes the refractory materials in the slag line section of the ladle during prolonged high-temperature refining, resulting in a significant reduction in the service life of the slag line bricks, a shortened cycle of minor and major repairs of the ladle, and a significant increase in the consumption of refractory materials per ton of steel. Especially in the smelting of high-alloy steel, the service life of the slag line bricks is 30%-50% lower than that under conventional special steel smelting conditions. Currently, magnesia-carbon bricks are commonly used for ladle slag line bricks, while zircon-carbon bricks are used for some special steel grades. The insufficient service life is due not only to the harsh working conditions but also to factors such as the low purity of fused magnesia, small grain size, and insufficient graphite purity in the raw materials. More importantly, the fine magnesia powder and graphite are prone to react at high temperatures, exacerbating the deterioration of the material structure. The addition of fine magnesia powder to existing magnesia-carbon bricks further accelerates high-temperature erosion and structural spalling, making it difficult to meet the refining requirements of high alloy steel for long cycles and low inclusion control.

[0003] Therefore, there is an urgent need to develop a new type of slag line brick material with high corrosion resistance and structural stability to adapt to the harsh conditions of high-alloy steel smelting. Against this backdrop, a multi-stage mixing device for ladle slag line brick raw materials is proposed.

[0004] For example, the production apparatus for low-carbon magnesia-carbon bricks for refining ladle slag lines disclosed in patent announcement number CN113385260B includes a grinding device, a sand mixer, and a press. The grinding device includes a shell, a grinding ring groove, a grinding cylinder, a rotating cylinder, and an adjusting device. The grinding cylinder includes multiple grinding plates, a first hinged column, and a second hinged column. The adjusting device includes multiple counterweights, a sliding collar, multiple first connecting rods, multiple second connecting rods, and springs. Although it achieves the grinding and crushing of raw materials for producing low-carbon magnesia-carbon bricks using a deformable grinding cylinder, the grinding cylinder is hexagonal under normal operation. If jamming occurs during grinding, the grinding cylinder gradually returns to a dodecagonal shape, the annular opening is blocked, and the material cannot fall. The increased grinding space reduces the frictional resistance of the material, making it easier to release the jam. However, this does not solve the problem that existing mixing equipment is not conducive to the fine screening and uniform mixing of raw materials, nor is it conducive to the flexible adjustment and adaptation to different conveying heights, which affects the quality of raw material mixing and the convenience of material output. Utility Model Content

[0005] The purpose of this utility model is to provide a multi-stage mixing equipment for steel ladle slag line brick raw materials, so as to solve the problems mentioned in the background art, which are not conducive to the fine screening of raw materials and uniform mixing of raw materials, and are not conducive to flexible adjustment and adaptation to different conveying heights, thus affecting the quality of raw material mixing and the convenience of material output.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage mixing equipment for steel ladle slag brick raw materials, comprising a support platform and a mixing tank. The mixing tank is mounted on the top of the support platform. A second electric push rod is mounted on the top of the support platform on both sides of the mixing tank. A tank cover is mounted on the top of the mixing tank. A second push arm is mounted on the output end of each of the second electric push rods, and the second push arm is connected to the tank cover. A screen box is symmetrically mounted on the top of the tank cover. Tracks are symmetrically mounted on the inner wall of each screen box, and a screen frame is mounted between each set of tracks. Pulleys are symmetrically mounted on the side of each screen frame near the track, and the screen frame is slidably connected to the track through the pulleys. A third servo motor is mounted on the inner wall of the screen box on one side of each screen frame. A rotating disk is mounted on the output end of each third servo motor. A long connecting arm is movably mounted at the eccentric position at the top of each rotating disk.

[0007] Preferably, a short connecting arm is movably installed at the end of the long connecting arm away from the rotating disk, and the short connecting arm is connected to the screen frame.

[0008] Preferably, a base plate is provided below the support platform, and a support frame is provided on one side wall of the support platform.

[0009] Preferably, a first servo motor is provided at the top of the support frame, and a pulley assembly is provided at the output end of the first servo motor.

[0010] Preferably, a limiting slide is provided on the side wall of the support frame, and a lead screw is movably installed inside the limiting slide, and a pulley assembly is connected to the lead screw.

[0011] Preferably, the surface of the lead screw is fitted with a threaded sleeve, and the threaded sleeve is threadedly connected to the lead screw. The surface of the threaded sleeve is provided with a sliding frame, and the sliding frame is slidably connected to the lead screw. The top of the sliding frame is provided with a second servo motor, and the output end of the second servo motor is equipped with a stirring frame.

[0012] Preferably, a belt conveyor is provided at the top of the base plate, and a hinge shaft is provided at one end of the belt conveyor near the base plate, and the belt conveyor is movably connected to the base plate through the hinge shaft.

[0013] Preferably, a first electric push rod is movably mounted on the side wall of the base plate, and a first push arm is mounted on the output end of the first electric push rod.

[0014] Preferably, the first push arm is provided with a connecting shaft at one end near the belt conveyor, and the first push arm is movably connected to the belt conveyor through the connecting shaft.

[0015] Preferably, a PLC controller is provided on the side wall of the other side of the support platform, and the output terminal of the PLC controller is electrically connected to the input terminals of the belt conveyor, the first servo motor, the second servo motor, the first electric push rod, the second electric push rod, and the third servo motor.

[0016] Compared with the prior art, the beneficial effects of this utility model are: this mixing equipment not only achieves fine screening and uniform mixing of raw materials, facilitating flexible adjustment and adaptation to different conveying heights, but also improves the quality of raw material mixing and the convenience of material output. (1) Before mixing the raw materials of steel ladle slag line bricks, the raw materials need to be finely screened. The screening order is to first place the fused large crystal magnesia, and after the fused large crystal magnesia is screened, other raw materials are placed and screened in sequence. After the raw materials are placed in the screen frame, the third servo motor drives the rotating disk to rotate, the rotating disk drives the long connecting arm to rotate, the long connecting arm drives the short connecting arm to swing back and forth, the short connecting arm drives the screen frame to shake back and forth, and the screen frame drives the raw materials to shake. Large particles of raw materials remain in the screen frame, and fine particles enter the interior of the mixing tank. After screening and adding multiple raw materials to the mixing tank in sequence, the second servo motor drives the mixing frame to rotate, and the mixing frame stirs the multiple raw materials. The first servo motor drives the pulley assembly to move back and forth, the pulley assembly drives the screw to rotate back and forth, and the screw passes through the thread The sliding frame moves up and down, which in turn drives the second servo motor and the stirring frame to move up and down. During this up-and-down movement, the stirring frame thoroughly stirs the raw materials from different positions. Due to the different particle diameters of the various raw materials, the stirring action of the stirring frame causes the particles of the various raw materials to be densely packed. At the same time, calcium aluminate is added as an expansion compensation phase. Then, phenolic resin binder and antioxidant are injected into the mixing tank, and stirring continues to mix the raw materials into a "sludge" state. The particle diameters of the above materials are in the following order: fused macrocrystalline magnesia > fused zircon spinel > fused barium zirconate > high-purity graphite. The particle size gradient design of the raw materials makes the mixture more compact. The above design can finely screen the raw materials and uniformly stir them, and the particle size gradient design makes the raw material particles densely packed.

[0017] (2) Open the electric valve at the bottom of the mixing tank. The raw material falls onto the surface of the belt conveyor. The belt conveyor moves the raw material and transports it to the material transport vehicle. If the height of the material transport vehicle is different, the first electric push rod moves the first push arm. The first push arm drives the belt conveyor to rotate around the hinge shaft through the connecting shaft to adjust the output height of the belt conveyor, so as to adapt to the material transport vehicles of different heights. When it is necessary to inspect the inside of the mixing tank, the second electric push rod moves the second push arm upward. The second push arm moves the tank cover upward to open the tank cover, so as to facilitate the operator to observe and inspect the condition inside the mixing tank. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the limiting slide of this utility model; Figure 3 This is a frontal cross-sectional view of the present invention. Figure 4 This is a side view sectional structural diagram of the mixing tank of this utility model; Figure 5 This is a three-dimensional perspective view of the sieve box of this utility model.

[0019] In the diagram: 1. Support platform; 2. Base plate; 3. Belt conveyor; 4. Support frame; 5. Mixing tank; 6. Screen box; 7. First servo motor; 8. Pulley assembly; 9. Lead screw; 10. Threaded sleeve; 11. Sliding frame; 12. Second servo motor; 13. Mixing frame; 14. First electric push rod; 15. First push arm; 16. Connecting shaft; 17. Hinge shaft; 18. Tank lid; 19. Second electric push rod; 20. Second push arm; 21. PLC controller; 22. Screen frame; 23. Third servo motor; 24. Rotary disk; 25. Long connecting arm; 26. Short connecting arm; 27. Track; 28. Pulley; 29. ​​Limiting slide. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Example 1 Please see Figure 1-5 This utility model provides an embodiment of a multi-stage mixing device for steel ladle slag brick raw materials, including a support platform 1 and a mixing tank 5. The mixing tank 5 is mounted on the top of the support platform 1. Second electric push rods 19 are mounted on the tops of the support platform 1 on both sides of the mixing tank 5. A tank cover 18 is mounted on the top of the mixing tank 5. Second push arms 20 are installed at the output ends of the second electric push rods 19, and the second push arms 20 are connected to the tank cover 18. Screen boxes 6 are symmetrically arranged on the top of the tank cover 18. Tracks 27 are symmetrically arranged on the inner walls of the screen boxes 6, and screen frames 22 are arranged between the two sets of tracks 27. Each side of the screen frame 22 near the track 27 is symmetrically provided with pulleys 28, and the screen frame 22 is slidably connected to the track 27 through the pulleys 28. Each side of the screen box 6 on one side of the screen frame 22 is provided with a third servo motor 23. Each output end of the third servo motor 23 is equipped with a rotating disk 24. Each top of the rotating disk 24 is eccentrically positioned with a long connecting arm 25. Each end of the long connecting arm 25 away from the rotating disk 24 is movably equipped with a short connecting arm 26, and the short connecting arm 26 is connected to the screen frame 22. A base plate 2 is provided below the support platform 1, and a support frame 4 is provided on one side wall of the support platform 1. In this utility model, the PLC controller 21 is a Siemens S7-200, which is a mature existing technology. Therefore, its internal structure, working principle, and connection and control method with the electrical components in this application will not be described in detail. The raw materials required for producing ladle slag line bricks are: fused macrocrystalline magnesia, fused zircon spinel, fused barium zirconate, and high-purity graphite. Before mixing the raw materials for ladle slag line bricks, the raw materials need to be finely screened. The screening order is as follows: first, fused macrocrystalline magnesia is placed; after the fused macrocrystalline magnesia is screened, other raw materials are placed and screened in sequence. After being placed inside the sieve frame 22, the third servo motor 23 is turned on, which drives the rotating disk 24 to rotate. The rotating disk 24 drives the long connecting arm 25 to rotate, which in turn drives the short connecting arm 26 to swing back and forth. With the sliding cooperation of the pulley 28 and the track 27, the short connecting arm 26 drives the sieve frame 22 to swing back and forth, which in turn drives the raw material to swing. Large particles of raw material remain inside the sieve frame 22, while fine particles enter the interior of the mixing tank 5. After the various raw materials are sequentially screened and added to the mixing tank 5, the second servo motor 12 is turned on, which drives the mixing frame 13 to rotate. The mixing rack 13 mixes various raw materials, while simultaneously activating the first servo motor 7. The first servo motor 7 drives the pulley assembly 8 to move back and forth, which in turn drives the lead screw 9 to rotate back and forth. With the lead screw 9 threadedly connected to the threaded sleeve 10, and the sliding frame 11 sliding with the limiting slide 29, the lead screw 9 drives the sliding frame 11 to move up and down via the threaded sleeve 10. The sliding frame 11 then drives the second servo motor 12 and the mixing rack 13 to move up and down. During this up-and-down movement, the mixing rack 13 thoroughly mixes the raw materials from different positions. Because the particles of the various raw materials are directly... Under the stirring action of the stirring rack 13, various raw material particles with different diameters are compacted together. At the same time, calcium aluminate is added as an expansion compensation phase. Then, phenolic resin binder and antioxidant are injected into the stirring tank 5, and stirring continues to mix the raw materials into a "sludge" state. The particle diameter of the above materials is in the following order: fused large crystal magnesia > fused zircon spinel > fused barium zirconate > high-purity graphite. The raw material particle size gradient design makes the raw materials more compactly mixed. The above design can finely screen the raw materials and uniformly stir them. The raw material particle size gradient design makes the raw material particles compactly packed. The top of the support frame 4 is provided with a first servo motor 7, the output end of the first servo motor 7 is provided with a pulley assembly 8, the side wall of the support frame 4 is provided with a limiting slide 29, and a lead screw 9 is movably installed inside the limiting slide 29, and the pulley assembly 8 is connected to the lead screw 9. A threaded sleeve 10 is fitted on the surface of the lead screw 9, and the threaded sleeve 10 is threadedly connected to the lead screw 9. A sliding frame 11 is provided on the surface of the threaded sleeve 10, and the sliding frame 11 is slidably connected to the lead screw 9. A second servo motor 12 is provided at the top of the sliding frame 11, and a stirring frame 13 is installed at the output end of the second servo motor 12. A belt conveyor 3 is provided at the top of the base plate 2. A hinge shaft 17 is provided at one end of the belt conveyor 3 near the base plate 2, and the belt conveyor 3 is movably connected to the base plate 2 through the hinge shaft 17. A first electric push rod 14 is movably installed on the side wall of the base plate 2. A first push arm 15 is installed at the output end of the first electric push rod 14. A connecting shaft 16 is provided at the end of the first push arm 15 near the belt conveyor 3, and the first push arm 15 is movably connected to the belt conveyor 3 through the connecting shaft 16. A PLC controller 21 is installed on the side wall of the other side of the support platform 1, and the output terminal of the PLC controller 21 is electrically connected to the input terminal of the belt conveyor 3, the first servo motor 7, the second servo motor 12, the first electric push rod 14, the second electric push rod 19, and the third servo motor 23. After the raw materials are mixed, open the electric valve at the bottom of the mixing tank 5. Under the action of gravity, the raw materials fall onto the surface of the belt conveyor 3. Turn on the belt conveyor 3, which will move the raw materials and transport them to the transport vehicle. If the height of the transport vehicle is different, the first electric push rod 14 can be opened. The first electric push rod 14 will move the first push arm 15. The first push arm 15 will drive the belt conveyor 3 to rotate around the hinge shaft 17 through the connecting shaft 16, thereby adjusting the output height of the belt conveyor 3 to adapt to transport vehicles of different heights. When it is necessary to inspect the inside of the mixing tank 5, open the second electric push rod 19. The second electric push rod 19 will move the second push arm 20 upward, which will move the tank cover 18 upward to open the tank cover 18, making it convenient for the operator to observe and inspect the inside of the mixing tank 5.

[0024] Work steps Before mixing the raw materials for steel ladle slag bricks, the raw materials need to be finely screened. The screening order is as follows: first, place fused large crystalline magnesia; after screening the fused large crystalline magnesia, place other raw materials in sequence. After the raw materials are placed in the screen frame 22, the third servo motor 23 drives the rotating disk 24 to rotate, which in turn drives the long connecting arm 25 to rotate. The long connecting arm 25 drives the short connecting arm 26 to swing back and forth, which in turn drives the screen frame 22 to shake back and forth. The screen frame 22 then causes the raw materials to shake. Large particles of raw materials remain in the screen frame 22, while fine particles enter the interior of the mixing tank 5, mixing various materials. After the raw materials are sequentially screened and added to the mixing tank 5, the second servo motor 12 drives the mixing frame 13 to rotate, which in turn mixes the various raw materials. The first servo motor 7 drives the pulley assembly 8 to reciprocate, which in turn drives the lead screw 9 to reciprocate. The lead screw 9, through the threaded sleeve 10, drives the sliding frame 11 to move up and down, which in turn drives the second servo motor 12 and the mixing frame 13 to move up and down. During this up-and-down movement, the mixing frame 13 thoroughly mixes the raw materials from different positions. Because the particle diameters of the various raw materials are different, the mixing action of the mixing frame 13... Multiple raw material particles are tightly packed together, and calcium aluminate is added as an expansion compensation phase. Then, phenolic resin binder and antioxidant are injected into the mixing tank 5, and stirring continues until the raw materials are mixed into a "sludge" state. The particle diameters of the above materials are in the following order: fused macrocrystalline magnesia > fused zircon spinel > fused barium zirconate > high-purity graphite. This particle size gradient design ensures a more compact mixture. After the raw materials are fully mixed, the electric valve at the bottom of the mixing tank 5 is opened. Under gravity, the raw materials fall onto the surface of the belt conveyor 3, which then moves and transports them to... Inside the material transport vehicle, the first electric push rod 14 drives the first push arm 15 to move. The first push arm 15 drives the belt conveyor 3 to rotate around the hinge shaft 17 via the connecting shaft 16, thereby adjusting the output height of the belt conveyor 3 to adapt to material transport vehicles of different heights. When it is necessary to inspect the inside of the mixing drum 5, the second electric push rod 19 drives the second push arm 20 to move upward, and the second push arm 20 drives the drum cover 18 to move upward, thereby opening the drum cover 18, which facilitates the operator to observe and inspect the condition inside the mixing drum 5. The above is the complete usage of the multi-stage mixing equipment for steel ladle slag line brick raw materials.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-stage mixing equipment for steel ladle slag line brick raw materials, comprising a support platform and a mixing tank, characterized in that: A mixing tank is mounted on the top of the support platform. A second electric push rod is mounted on the top of the support platform on both sides of the mixing tank. A lid is mounted on the top of the mixing tank. A second push arm is mounted on the output end of each of the second electric push rods, and the second push arm is connected to the lid. A sieve box is symmetrically mounted on the top of the lid. Tracks are symmetrically mounted on the inner walls of the sieve boxes, and a sieve frame is mounted between each set of tracks. Pulleys are symmetrically mounted on the side of each sieve frame closest to the track, and the sieve frame is slidably connected to the track via the pulleys. A third servo motor is mounted on the inner wall of the sieve box on one side of each sieve frame. A rotating disk is mounted on the output end of each third servo motor, and a long connecting arm is movably mounted at the eccentric position on the top of each rotating disk.

2. The multi-stage mixing equipment for steel ladle slag line brick raw materials according to claim 1, characterized in that: Each of the long connecting arms has a short connecting arm movably installed at the end furthest from the rotating disk, and the short connecting arm is connected to the screen frame.

3. The multi-stage mixing equipment for steel ladle slag line brick raw materials according to claim 1, characterized in that: A base plate is provided below the support platform, and a support frame is provided on one side wall of the support platform.

4. The multi-stage mixing equipment for steel ladle slag line brick raw materials according to claim 3, characterized in that: The top of the support frame is provided with a first servo motor, and the output end of the first servo motor is provided with a pulley assembly.

5. The multi-stage mixing equipment for steel ladle slag line brick raw materials according to claim 3, characterized in that: The support frame is provided with a limiting slide on its side wall, and a lead screw is movably installed inside the limiting slide, and a pulley assembly is connected to the lead screw.

6. The multi-stage mixing equipment for steel ladle slag line brick raw materials according to claim 5, characterized in that: The lead screw is fitted with a threaded sleeve, which is threadedly connected to the lead screw. The surface of the threaded sleeve is provided with a sliding frame, which is slidably connected to the lead screw. A second servo motor is provided at the top of the sliding frame, and a stirring frame is installed at the output end of the second servo motor. The stirring frame is slidably connected to the bucket lid.

7. The multi-stage mixing equipment for steel ladle slag line brick raw materials according to claim 3, characterized in that: A belt conveyor is provided at the top of the base plate, and a hinge shaft is provided at one end of the belt conveyor near the base plate. The belt conveyor is movably connected to the base plate through the hinge shaft.

8. The multi-stage mixing equipment for steel ladle slag line brick raw materials according to claim 3, characterized in that: A first electric push rod is movably mounted on the side wall of the base plate, and a first push arm is mounted on the output end of the first electric push rod.

9. A multi-stage mixing equipment for steel ladle slag line brick raw materials according to claim 8, characterized in that: The first push arm is provided with a connecting shaft at one end near the belt conveyor, and the first push arm is movably connected to the belt conveyor through the connecting shaft.

10. A multi-stage mixing equipment for steel ladle slag line brick raw materials according to claim 9, characterized in that: A PLC controller is installed on the side wall of the other side of the support platform, and the output terminal of the PLC controller is electrically connected to the input terminals of the belt conveyor, the first servo motor, the second servo motor, the first electric push rod, the second electric push rod, and the third servo motor.

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