A raw material mixing device for producing magnesium-aluminum-carbon brick

Abstract

The utility model discloses a raw material mixing device for magnesium-aluminum carbon brick production belongs to mixing device technical field, including the barrel, the upper end fixed mounting of barrel has the apron, the upper surface middle part fixed mounting of apron has the stirring motor, and the output of stirring motor and located the assembly of stirring board in the barrel, the upper surface fixed mounting of apron has the graphite feeding assembly, the upper surface fixed mounting of apron has the aggregate feeding port, the fine powder feeding port and the binder feeding port, the utility model discloses setting up the stirring board, the stirring rod and the cooperation of graphite feeding assembly, in the mixing process, first by the stirring board to aggregate and binder mixing, then by graphite feeding assembly will scale graphite even dispersion and put into the barrel, finally by the stirring board complete whole mixing, realized aggregate rubber coating, graphite adhesion and fine powder filling's phased orderly, reduced the repeated stirring damage to scale graphite while guaranteeing the mixing uniformity, and the mixing efficiency and graphite integrity are given full consideration to.

Description

Technical Field

[0001] This utility model belongs to the field of mixing device technology, and specifically provides a raw material mixing device for the production of magnesium aluminum carbon bricks. Background Technology

[0002] Magnesia-alumina-carbon bricks are high-performance refractory materials widely used in steel smelting and other fields. In the production process of magnesia-alumina-carbon bricks, raw material mixing is a crucial step determining product quality. However, existing mixing devices have significant shortcomings when handling flake graphite: firstly, flake graphite has a low density and tends to float and agglomerate during mixing, making it difficult to mix evenly with high-density aggregates such as magnesia, resulting in uneven carbon distribution in the brick body and affecting batch-to-batch stability of product performance; secondly, existing stirring structures often exert significant shear and impact forces on flake graphite, easily damaging its lamellar structure and reducing its thermal shock resistance and slag penetration resistance properties. Furthermore, in existing devices, graphite is prone to bridging and clogging during the feeding process in storage and conveying stages, affecting production efficiency.

[0003] Therefore, there is a need to provide a raw material mixing device for the production of magnesium-aluminum-carbon bricks to solve the above problems. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a raw material mixing device for the production of magnesium-aluminum-carbon bricks.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a raw material mixing device for the production of magnesium aluminum carbon bricks, comprising a cylinder, a cover plate fixedly installed at the upper end of the cylinder, support columns uniformly fixedly installed on the upper surface of the cover plate, a platform fixedly installed at the upper end of the support columns, a stirring motor fixedly installed in the middle of the upper surface of the cover plate, a stirring plate assembled at the output end of the stirring motor and located inside the cylinder, a graphite feeding component fixedly installed on the upper surface of the cover plate, and a graphite feeding port opened on the upper surface of the platform, and an aggregate feeding port, a fine powder feeding port and a binder feeding port fixedly installed on the upper surface of the cover plate; The graphite feeding assembly includes an outer cylinder, an inner cylinder, and a power motor. The outer cylinder and the inner cylinder are coaxially distributed. An internal gear is fixedly installed at the upper end of the outer cylinder, and an external gear is fixedly installed at the upper end of the inner cylinder. The power motor is fixedly installed on the upper surface of the platform. A drive gear is fixedly installed at the output end of the power motor. The drive gear meshes internally with the internal gear and externally with the external gear. A stirring rod is alternately assembled on the inner surface of the outer cylinder and the outer surface of the inner cylinder.

[0006] Furthermore, the outer cylinder is composed of an outer cylinder small diameter section located on the upper side, an outer cylinder transition section, and an outer cylinder large diameter section located on the lower side, and the inner cylinder is composed of an inner cylinder large diameter section located on the upper side, an inner cylinder transition section, and an inner cylinder small diameter section located on the lower side. An annular transition space is formed between the outer cylinder transition section and the inner cylinder transition section, and the stirring rod is assembled on the surface of the outer cylinder small diameter section, the outer cylinder large diameter section, the inner cylinder large diameter section, and the inner cylinder small diameter section.

[0007] Furthermore, the density of the stirring rods on the large-diameter section of the outer cylinder and the small-diameter section of the inner cylinder is greater than the density of the stirring rods on the small-diameter section of the outer cylinder and the large-diameter section of the inner cylinder.

[0008] Furthermore, a fixing ring is fixedly installed on the inner wall of the outer cylinder, a fixing annular tube is fixedly installed on the inner wall of the support column, a movable annular tube is rotatably assembled on the inner ring of the fixing annular tube, and a sealing ring is assembled between the fixing annular tube and the movable annular tube. A venting pipe is fixedly installed on the surface of the movable annular tube, and obliquely oriented air outlets are evenly opened on the inner surface of the fixing ring. The venting pipe passes through the outer cylinder and communicates with the air outlets. The output end of the air outlet faces the annular transition space.

[0009] Furthermore, the cover plate is composed of an annular plate and a circular plate, the circular plate is located at the center of the annular plate, and the annular space between the circular plate and the annular plate is a graphite outlet. A connecting rod is fixedly installed between the circular plate and the annular plate, and the connecting rod is located on the side away from the graphite inlet.

[0010] Furthermore, a limiting ring is fixedly installed on the upper surface of the cover plate. The limiting ring includes an inner limiting ring and an outer limiting ring. The inner limiting ring is fixedly installed on the circular plate, and the outer limiting ring is fixedly installed on the annular plate. The outer cylinder and the inner cylinder are respectively rotatably assembled on the outer limiting ring and the inner limiting ring.

[0011] Furthermore, both the upper surfaces of the internal gear and the external gear are provided with annular grooves, and a slip ring is fixedly installed on the lower surface of the platform, with the slip ring movably assembled within the annular groove.

[0012] The beneficial effects of using this utility model are: This invention utilizes the coordinated operation of a stirring plate, stirring rod, and graphite feeding assembly. During the mixing process, the stirring plate first mixes the aggregate and binder, then the graphite feeding assembly evenly disperses the flake graphite and feeds it into the cylinder, and finally the stirring plate completes the overall mixing. This achieves the phased and orderly process of aggregate coating, graphite adhesion, and fine powder filling, ensuring uniformity of mixing while reducing damage to the flake graphite from repeated stirring, thus balancing mixing efficiency and graphite integrity.

[0013] This invention features a graphite feeding assembly that utilizes the reverse rotation of the external and internal gears to cause the stirring rods on the outer and inner cylinders to move alternately in opposite directions. This effectively breaks up and evenly disperses the aggregated flake graphite, allowing it to fall uniformly onto the aggregate inside the cylinder. This reduces the number of times the stirring plate damages the flake graphite and protects the graphite's layered structure.

[0014] The surface of the stirring plate and stirring rod of this invention is coated with polyurethane elastomer, and the inner wall lining of the cylinder is made of mirror-polished alumina ceramic lining. During the mixing process, multiple layers of protection are provided for the flake graphite to avoid damage caused by shearing and scratching and to maintain the integrity of the graphite flakes.

[0015] This invention, by setting up a fixed annular tube, a movable annular tube, and an air guide tube, combined with an obliquely set air outlet, allows the airflow to flow inward and upward, providing a slight lift to the flake graphite, keeping it in a slightly loose state. At the same time, it forms a micro-air cushion, causing the graphite to slightly disperse within the annular transition space, thus falling more evenly into the space of the lower half of the outer and inner cylinders, improving the uniformity of graphite distribution. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0017] Figure 2 This is a three-dimensional schematic diagram of a portion of the structure on the cover plate of this utility model.

[0018] Figure 3 This is a partial perspective sectional view of the present invention.

[0019] Figure 4 This is a three-dimensional schematic diagram of the platform of this utility model.

[0020] Figure 5 This is a three-dimensional schematic diagram of the cover plate of this utility model.

[0021] Figure 6 This is a three-dimensional schematic diagram of the outer cylinder of this utility model.

[0022] Figure 7 This is a three-dimensional schematic diagram of the inner cylinder of this utility model.

[0023] The reference numerals in the attached drawings include: 1. cylinder, 2. cover plate, 21. stirring motor, 22. aggregate feeding port, 23. fine powder feeding port, 24. binder feeding port, 25. limiting ring, 3. platform, 31. support column, 32. fixed annular tube, 33. movable annular tube, 34. slip ring, 35. graphite feeding port, 4. outer cylinder, 41. internal gear, 42. stirring rod, 43. fixed ring, 44. air outlet, 5. inner cylinder, 51. external gear, 6. power motor, 61. drive gear. Detailed Implementation

[0024] 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.

[0025] Reference Figures 1 to 7 A raw material mixing device for the production of magnesium aluminum carbon bricks includes a cylinder 1, a cover plate 2 fixedly installed at the upper end of the cylinder 1, support columns 31 uniformly fixedly installed on the upper surface of the cover plate 2, a platform 3 fixedly installed at the upper end of the support columns 31, a stirring motor 21 fixedly installed in the middle of the upper surface of the cover plate 2, a stirring plate assembled at the output end of the stirring motor 21 and located inside the cylinder 1, a graphite feeding assembly fixedly installed on the upper surface of the cover plate 2, and a graphite feeding port 35 opened on the upper surface of the platform 3. An aggregate feeding port 22, a fine powder feeding port 23 and a binder feeding port 24 are fixedly installed on the upper surface of the cover plate 2.

[0026] The raw materials for magnesia-alumina-carbon bricks include refractory powder and matrix powder, carbonaceous raw materials, binders, and functional additives. The main raw material for refractory powder and matrix powder is magnesia, mostly fused high-purity magnesia or sintered magnesia, and also contains aluminum or spinel components. The main carbon source for carbonaceous raw materials is flake graphite, supplemented with a small amount of carbon black, pitch powder, etc. The main material for binders is thermosetting liquid phenolic resin. Functional additives are added in the form of fine powder, including antioxidants, plasticizers, and other modifiers. Refractory aggregates are fed into cylinder 1 through aggregate feeding port 22, matrix powder, functional additives, etc. are fed into cylinder 1 through fine powder feeding port 23, and binders are fed into cylinder 1 through binder feeding port 24.

[0027] In the raw material mixing process, the first step is to add refractory aggregate to establish a base material field; the second step is to add 1 / 2 to 1 / 3 of the total amount of liquid phenolic resin to form a viscous liquid film on the surface of the aggregate; the third step is to add flake graphite, which adheres to the outside of the liquid film of the aggregate to form a low-damage coating; the fourth step is to add the remaining liquid phenolic resin, matrix powder, functional additives, etc., with fine powder filling the pores and pressing the graphite onto the aggregate particles, and the remaining liquid phenolic resin is added to complete the final bonding.

[0028] During the mixing process, the stirring motor 21 drives the stirring plate to rotate and carry out the mixing work; the surface of the stirring plate is covered with polyurethane elastomer to avoid damage to the flake graphite; the inner wall lining of the cylinder 1 is made of alumina ceramic lining plate with mirror polishing, no sharp edges, and no weld seams or steps to avoid flake graphite from getting stuck.

[0029] like Figure 2, Figure 3 , Figure 6 and Figure 7 As shown, the graphite feeding assembly includes an outer cylinder 4, an inner cylinder 5, and a power motor 6. The outer cylinder 4 and the inner cylinder 5 are coaxially distributed. An internal gear 41 is fixedly installed at the upper end of the outer cylinder 4, and an external gear 51 is fixedly installed at the upper end of the inner cylinder 5. The power motor 6 is fixedly installed on the upper surface of the platform 3. A drive gear 61 is fixedly installed at the output end of the power motor 6. The drive gear 61 meshes internally with the internal gear 41 and externally with the external gear 51. A stirring rod 42 is alternately assembled on the inner surface of the outer cylinder 4 and the outer surface of the inner cylinder 5.

[0030] For the feeding of flake graphite, a graphite feeding component is set up to achieve the deagglomeration, protection and uniform distribution of flake graphite.

[0031] When the power motor 6 runs, it drives the drive gear 61 to rotate. Under the action of meshing, it drives the inner gear 41 and the outer gear 51 to rotate in opposite directions, which in turn drives the stirring rods 42 on the outer cylinder 4 and the inner cylinder 5 to rotate in opposite directions. The staggered rotation of the stirring rods 42 can effectively break up the aggregated flake graphite. At the same time, under the action of the stirring rods 42, the flake graphite is evenly dispersed, and finally the flake graphite falls evenly onto the aggregate in the cylinder 1. Compared with directly putting in the flake graphite, the mixing can be completed with fewer stirring times, reducing the damage of the stirring plate to the flake graphite.

[0032] The surface of the stirring rod 42 is coated with polyurethane elastomer to prevent damage to the flake graphite.

[0033] Specifically, such as Figure 3 As shown, the outer cylinder 4 is composed of an outer cylinder small diameter section located on the upper side, an outer cylinder transition section, and an outer cylinder large diameter section located on the lower side. The inner cylinder 5 is composed of an inner cylinder large diameter section located on the upper side, an inner cylinder transition section, and an inner cylinder small diameter section located on the lower side. An annular transition space is formed between the outer cylinder transition section and the inner cylinder transition section. The stirring rod 42 is assembled on the surface of the outer cylinder small diameter section, the outer cylinder large diameter section, the inner cylinder large diameter section, and the inner cylinder small diameter section.

[0034] Specifically, the density of the stirring rods 42 on the large-diameter section of the outer cylinder and the small-diameter section of the inner cylinder is greater than the density of the stirring rods 42 on the small-diameter section of the outer cylinder and the large-diameter section of the inner cylinder.

[0035] This allows the stirring rod 42 in the lower section to more finely break down and disperse the flake graphite.

[0036] Specifically, such as Figure 3 and Figure 4As shown, a fixed ring 43 is fixedly installed on the inner wall of the outer cylinder 4, and a fixed annular tube 32 is fixedly installed on the inner wall of the support column 31. A movable annular tube 33 is rotatably assembled on the inner ring of the fixed annular tube 32, and a sealing ring is assembled between the fixed annular tube 32 and the movable annular tube 33. A duct is fixedly installed on the surface of the movable annular tube 33. An obliquely oriented air outlet 44 is evenly opened on the inner surface of the fixed ring 43, and the duct passes through the outer cylinder 4 and connects with the air outlet 44. The output end of the air outlet 44 faces the annular transition space.

[0037] When the outer cylinder 4 rotates, the transmission through the air guide pipe will drive the movable annular pipe 33 to rotate inside the fixed annular pipe 32, without affecting the transmission of airflow. The fixed annular pipe 32 is connected to the external air supply equipment through the pipeline. The airflow flows to the annular transition space through the fixed annular pipe 32, the movable annular pipe 33, the air guide pipe, and the air outlet 44. Due to the inclined setting of the air outlet 44, the outflowing gas is directed inward and upward, providing a small lift force to the flake graphite. The airflow speed is much lower than the suspension speed of the graphite, so it will not blow the graphite up, but will keep the graphite in a slightly loose state with better fluidity. At the same time, the gas will form a micro-air cushion, allowing the flake graphite to spread slightly in the annular transition space and fall more evenly into the larger space in the lower half of the outer cylinder 4 and the inner cylinder 5. Afterward, the flake graphite falls into the space in the lower half of the outer cylinder 4 and the inner cylinder 5, and is further dispersed under the action of the denser stirring rod 42.

[0038] Specifically, such as Figure 5 As shown, the cover plate 2 is composed of an annular plate and a circular plate. The circular plate is located at the center of the annular plate, and the annular space between the circular plate and the annular plate is the graphite outlet. A connecting rod is fixedly installed between the circular plate and the annular plate, and the connecting rod is located on the side away from the graphite feeding port 35.

[0039] After the flake graphite is dispersed, it falls from the graphite outlet. The connecting rods are all located far away from the graphite outlet. The flake graphite is dispersed by the stirring rod 42. The main dispersion area is below and around the graphite feeding port 35. The installation position of the connecting rods ensures that they will not affect the falling of the flake graphite.

[0040] The cross-sectional shape of the connecting rod is semi-circular or triangular to avoid the accumulation of flake graphite; for connecting rods 35 degrees away from the graphite feeding port, a more robust and stable installation method can be set to improve the stability of the circular plate, the stirring motor, and the stirring plate.

[0041] Specifically, such as Figure 5 As shown, a limiting ring 25 is fixedly installed on the upper surface of the cover plate 2. The limiting ring 25 includes an inner limiting ring and an outer limiting ring. The inner limiting ring is fixedly installed on the circular plate, and the outer limiting ring is fixedly installed on the annular plate. The outer cylinder 4 and the inner cylinder 5 are respectively rotatably assembled on the outer limiting ring and the inner limiting ring.

[0042] By setting outer and inner limit rings to limit the positions of outer cylinder 4 and inner cylinder 5, stable meshing of each gear is ensured.

[0043] Specifically, such as Figure 3 As shown, the upper surfaces of both the internal gear 41 and the external gear 51 are provided with annular grooves, and a slip ring 34 is fixedly installed on the lower surface of the platform 3, and the slip ring 34 is movably assembled in the annular groove.

[0044] The annular groove and slip ring 34 are designed to ensure the stability of the rotation of the outer cylinder 4 and the inner cylinder 5, while preventing the flake graphite from scattering from above.

[0045] The above content is only a preferred embodiment of this utility model. For those skilled in the art, many changes can be made in the specific implementation and application scope based on the concept of this utility model. As long as these changes do not depart from the concept of this utility model, they all fall within the protection scope of this utility model.

Claims

1. A raw material mixing device for the production of magnesium-aluminum-carbon bricks, characterized in that: The device includes a cylinder, a cover plate fixedly installed at the upper end of the cylinder, support columns evenly fixedly installed on the upper surface of the cover plate, a platform fixedly installed at the upper end of the support columns, a stirring motor fixedly installed in the middle of the upper surface of the cover plate, a stirring plate assembled at the output end of the stirring motor and located inside the cylinder, a graphite feeding assembly fixedly installed on the upper surface of the cover plate, a graphite feeding port opened on the upper surface of the platform, and an aggregate feeding port, a fine powder feeding port and a binder feeding port fixedly installed on the upper surface of the cover plate. The graphite feeding assembly includes an outer cylinder, an inner cylinder, and a power motor. The outer cylinder and the inner cylinder are coaxially distributed. An internal gear is fixedly installed at the upper end of the outer cylinder, and an external gear is fixedly installed at the upper end of the inner cylinder. The power motor is fixedly installed on the upper surface of the platform. A drive gear is fixedly installed at the output end of the power motor. The drive gear meshes internally with the internal gear and externally with the external gear. A stirring rod is alternately assembled on the inner surface of the outer cylinder and the outer surface of the inner cylinder.

2. The raw material mixing device for producing magnesium-aluminum-carbon bricks according to claim 1, characterized in that: The outer cylinder is composed of an outer cylinder small diameter section on the upper side, an outer cylinder transition section, and an outer cylinder large diameter section on the lower side. The inner cylinder is composed of an inner cylinder large diameter section on the upper side, an inner cylinder transition section, and an inner cylinder small diameter section on the lower side. An annular transition space is formed between the outer cylinder transition section and the inner cylinder transition section. The stirring rod is assembled on the surface of the outer cylinder small diameter section, the outer cylinder large diameter section, the inner cylinder large diameter section, and the inner cylinder small diameter section.

3. The raw material mixing device for producing magnesium-aluminum-carbon bricks according to claim 2, characterized in that: The density of the stirring rods on the large-diameter section of the outer cylinder and the small-diameter section of the inner cylinder is greater than the density of the stirring rods on the small-diameter section of the outer cylinder and the large-diameter section of the inner cylinder.

4. The raw material mixing device for producing magnesium-aluminum-carbon bricks according to claim 2, characterized in that: A fixing ring is fixedly installed on the inner wall of the outer cylinder, and a fixing annular tube is fixedly installed on the inner wall of the support column. A movable annular tube is rotatably assembled on the inner ring of the fixing annular tube, and a sealing ring is assembled between the fixing annular tube and the movable annular tube. A venting pipe is fixedly installed on the surface of the movable annular tube. An obliquely oriented air outlet is evenly opened on the inner surface of the fixing ring, and the venting pipe passes through the outer cylinder and communicates with the air outlet. The output end of the air outlet faces the annular transition space.

5. The raw material mixing device for producing magnesium-aluminum-carbon bricks according to claim 1, characterized in that: The cover plate is composed of an annular plate and a circular plate. The circular plate is located at the center of the annular plate, and the annular space between the circular plate and the annular plate is the graphite outlet. A connecting rod is fixedly installed between the circular plate and the annular plate, and the connecting rod is located on the side away from the graphite inlet.

6. The raw material mixing device for producing magnesium-aluminum-carbon bricks according to claim 5, characterized in that: A limiting ring is fixedly installed on the upper surface of the cover plate. The limiting ring includes an inner limiting ring and an outer limiting ring. The inner limiting ring is fixedly installed on the circular plate, and the outer limiting ring is fixedly installed on the annular plate. The outer cylinder and the inner cylinder are respectively rotatably assembled on the outer limiting ring and the inner limiting ring.

7. The raw material mixing device for producing magnesium-aluminum-carbon bricks according to claim 1, characterized in that: Both the internal and external gears have annular grooves on their upper surfaces, and a slip ring is fixedly installed on the lower surface of the platform, with the slip ring movably assembled within the annular groove.

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