A sintering mixture bin particle size distribution adjusting device

Abstract

The utility model discloses a kind of sintering mixed material bin particle size distribution adjusting devices, belong to sintering machine technical field, including mixed material bin grid framework, mixed material bin grid framework is set on concrete frame, mixed material bin grid framework below movably connected with mixed material bin, mixed material bin grid framework is provided with several cloth material components, mixed material bin below is provided with bottom support platform, bottom support platform is provided with several weighing components, several weighing components are connected at mixed material bin bottom, when mixed material is contacted after passing through several groups cloth material components, its falling trajectory is changed, so that material is in discrete distribution state in bin body, ensure the uniform accumulation of different particle size material, coarse particle concentration phenomenon of mixed material can be reduced, alleviate fuel combustion uneven, sintered ore intensity decline phenomenon.

Description

Technical Field

[0001] This utility model belongs to the field of sintering machine technology, specifically a particle size distribution adjustment device for sintering mixture bins. Background Technology

[0002] In the sintering process, the mixture composed of ore, fuel, flux, etc., is first processed into pellets by a secondary mixer. The pelletized mixture is then pre-stored in a sintering mixing silo via a shuttle feeder. The mixing silo serves as a buffer and quantitative storage unit, supplying material to the sintering machine according to production needs, thus achieving continuous and stable production. The effective operation of the mixing silo has a significant impact on the uniform distribution of materials, the permeability of the material layer, and the sintering quality during the sintering process.

[0003] Utility model patent CN203810919U discloses a sintering machine mixing silo, including a main silo, a secondary silo, and a steam preheating device. The bottom of the main silo is inserted into the secondary silo. The steam preheating device includes a steam main pipe, a steam main pipe fixing device, an internal fixing device, and a steam supply pipe assembly connected to the steam main pipe. The steam main pipe is fixed above the main silo by the fixing device. One end of the steam supply pipe assembly is suspended from the steam main pipe, and the other end passes through the main silo and is placed in the secondary silo, and is fixed by the internal fixing device. This design can meet the requirements of a floating silo setting, ensuring that the mixture is fully heated and at a uniform temperature during pre-storage, thus improving the fluidity and preheating efficiency of the mixture.

[0004] However, during the process of the mixture entering the silo, due to the differences in the physical properties of different particles and the material movement law, different particle sizes will be unevenly distributed in the silo, that is, an initial distribution state with fine centers and coarse edges. This kind of particle size segregation will directly affect the subsequent sintering process: the concentration of fine particles will lead to poor permeability of the material layer and slow down the sintering speed; the concentration of coarse particles will cause uneven combustion of fuel and a decrease in the strength of sintered ore, thus resulting in the phenomenon of concentrated distribution of coarse and fine particles in the mixture, causing uneven combustion and a decrease in the performance of sintered ore. Utility Model Content

[0005] The purpose of this invention is to provide a particle size distribution adjustment device for sintered mixture silos, so as to solve at least one aspect of the problems and defects mentioned in the background art.

[0006] A sintering mixture bin particle size distribution adjustment device is provided, comprising a mixing bin grid frame, the mixing bin grid frame being mounted on a concrete frame, a mixing bin being movably connected below the mixing bin grid frame, a plurality of material distribution components being mounted on the mixing bin grid frame, a bottom support platform being mounted below the mixing bin, and a plurality of weighing components being mounted on the bottom support platform, the plurality of weighing components being connected to the bottom of the mixing bin.

[0007] Furthermore, a sliding gap is provided between the grid frame of the mixing bin and the mixing bin.

[0008] Furthermore, the fabric assembly includes a hydraulic motor, which is mounted on the grid frame of the mixing hopper. The output end of the hydraulic motor is fixedly connected to a main shaft, and the main shaft is equipped with several redirecting blocks.

[0009] Furthermore, the main shaft is rotatably connected to a bearing housing, and the bearing housing is bolted to the grid frame of the mixing silo.

[0010] Furthermore, the redirecting block is provided with a through hole, and a main shaft is fixedly connected inside the through hole.

[0011] Furthermore, the redirection block is provided with mounting holes.

[0012] Furthermore, several sets of steam heating pipes are provided in the middle of the mixing silo.

[0013] Furthermore, the weighing assembly includes a support platform, which is disposed on the outer sidewall of the mixing silo, and a flange-type load cell is connected below the support platform, with the bottom of the flange-type load cell disposed on the bottom support platform.

[0014] Furthermore, the inner wall of the mixing silo is provided with a ceramic lining plate.

[0015] Furthermore, a hydraulic pipeline is connected to one side of the upper part of the hydraulic motor, and a hydraulic control valve platform is connected to the side of the hydraulic pipeline away from the hydraulic motor.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: This device uses a grid frame for mixing silos mounted on a concrete frame, with floating mixing silos installed below. This allows the mixing silos to float, while several sets of material distribution components move left and right above the silos, achieving layered distribution of materials in the lateral direction of the silo. When the mixture comes into contact with these distribution components, its falling trajectory is altered, resulting in a discrete distribution of materials within the silo. This ensures uniform accumulation of materials of different particle sizes, reduces the concentration of coarse particles in the mixture, and mitigates uneven fuel combustion and decreased sinter strength. Attached Figure Description

[0017] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 A schematic diagram of the overall structure of a particle size distribution adjustment device for a sintering mixture silo; Figure 2 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 3 A top view of the grid frame structure of the mixing silo provided by this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the redirection block provided by this utility model.

[0019] In the diagram: 1. Mixing silo grid frame; 2. Mixing silo; 21. Ceramic liner; 3. Material distribution assembly; 31. Hydraulic motor; 32. Main shaft; 33. Diverter block; 331. Through hole; 332. Mounting hole; 34. Bearing seat; 4. Bottom support platform; 5. Weighing assembly; 51. Support platform; 52. Flange column type load cell; 6. Steam heating pipe; 7. Hydraulic pipeline; 8. Hydraulic control valve platform; 100. Concrete frame; 101. Floating clearance. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0023] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model; that is, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The components of the embodiments of the present utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] Please see Figure 1-4 As shown in the embodiment of this utility model, a particle size distribution adjustment device for a sintering mixture silo includes a mixing silo grid frame 1, which is set on a concrete frame 100. A mixing silo 2 is movably connected below the mixing silo grid frame 1. A plurality of material distribution components 3 are set on the mixing silo grid frame 1. A bottom support platform 4 is set below the mixing silo 2. A plurality of weighing components 5 are set on the bottom support platform 4 and connected to the bottom of the mixing silo 2. This device achieves dynamic adjustment during the material distribution process by setting a mixing bin grid frame 1 on a concrete frame 100 and installing a floating mixing bin 2 below. A floating gap 101 is set between the mixing bin 2 and the concrete frame 100, so that the mixing bin 2 is in a floating state, which can buffer the impact force of material distribution, reduce the impact stress of concentrated material accumulation on the mixing bin 2, and extend the service life of the equipment. Several sets of material distribution components 3 at the top move left and right above the mixing bin 2 to achieve layered distribution of the mixture in the lateral direction of the mixing bin 2. When the mixture comes into contact with several sets of material distribution components 3, its falling trajectory is changed, so that the material is discretely distributed in the mixing bin 2, ensuring uniform accumulation of materials of different particle sizes, reducing the phenomenon of coarse particle concentration in the mixture, and mitigating the phenomenon of uneven fuel combustion and reduced sinter strength. Several weighing components 5 at the bottom of the mixing silo 2 are set on the bottom support platform 4. By detecting the weight change of the mixing silo 2 in real time, the amount of material and the feeding time are controlled to avoid the material exceeding the grid and causing problems such as material blockage and overflow in the feeding system, thus ensuring the continuous and stable operation of the sintering machine.

[0027] In one embodiment, see Figure 1 , Figure 2 and Figure 4 As shown, a floating gap 101 is provided between the concrete frame 100 and the mixing silo 2; A floating gap 101 is provided between the concrete frame 100 and the mixing silo 2. The principle behind this is that by reserving a certain gap space, the mixing silo 2 is in a floating state, effectively absorbing the vibration energy brought by the impact of material placement, reducing the impact stress on the mixing silo 2 and the foundation structure, and preventing cracks or localized fatigue damage to the concrete frame 100 due to prolonged impact. Through the existence of the floating gap 101, the weighing component 5 can independently bear and monitor the weight changes of the mixing silo 2 and its internal materials in real time, without being interfered with by the rigid constraint of the concrete frame 100, thus ensuring the accuracy and sensitivity of the weighing signal. Based on the weight signal fed back by the weighing component 5, the system can dynamically determine the feeding progress and accumulation amount of materials in the mixing silo 2, realizing automatic adjustment of the material placement amount and control of the material placement rhythm, preventing the problem of the feeding system stopping due to over-feeding.

[0028] In one embodiment, see Figure 1 , Figure 2 and Figure 4 As shown, the fabric assembly 3 includes a hydraulic motor 31 (the specific model of the hydraulic motor 31 is BMR-100). The hydraulic motor 31 is mounted on the grid frame 1 of the mixing bin. The output end of the hydraulic motor 31 is fixedly connected to a main shaft 32. Several redirecting blocks 33 are mounted on the main shaft 32.

[0029] The feeding assembly 3 is driven by a hydraulic motor 31 to rotate the main shaft 32. Several deflector blocks 33 are evenly distributed on the main shaft 32, forming a controllable dynamic feeding system. When the mixture falls freely from the upper feed port, it first contacts the rotating deflector blocks 33. Driven by the rotation of the main shaft 32, the deflector blocks 33 change the falling direction and speed of the material, causing the falling trajectory of the material to deflect and scatter. Since the position, angle and rotation speed of the deflector blocks 33 can be adjusted, the distribution trajectory of the material in different time and spatial directions changes non-linearly, thereby realizing the multi-point, discrete distribution of the mixture in the mixing bin 2. This effectively reduces the problem of material being concentrated in the center or one side of the bin during the traditional feeding process, and enables the mixture of different particle sizes and densities to be evenly layered and stacked in the mixing bin 2, improving the particle size distribution, increasing the air permeability and uniformity of the material layer, and providing a stable and uniform raw material base for the sintering process.

[0030] In one embodiment, see Figure 1 and Figure 2 As shown, the mixing silo grid frame 1 is also provided with bearing seats 34, and the main shaft 32 is rotatably connected to the bearing seats 34. In the specific implementation process, according to the installation position of the material distribution assembly 3, several bearing seats 34 are installed on the mixing silo grid frame 1 along both ends of the main shaft 32. The bearing seats 34 are used to ensure the rotational accuracy of the main shaft 32 and prevent the main shaft 32 from rotating off-center.

[0031] In one embodiment, see Figure 1 and Figure 2 As shown, the redirecting block 33 is provided with a through hole 331, and a main shaft 32 is fixedly connected in the through hole 331. When the material is being distributed, the hydraulic motor 31 drives the main shaft 32 to rotate. The main shaft 32 drives multiple redirecting blocks 33 fixed through the through hole 331 to rotate synchronously. When the mixture falls from above and comes into contact with the inclined surface of the redirecting block 33, it is changed in direction and thrown into different areas of the bin under the combined action of centrifugal force and gravity, thereby realizing the discrete distribution and multi-point accumulation of the material.

[0032] In one embodiment, see Figure 1 , Figure 2 and Figure 4 As shown, the redirecting block 33 is provided with mounting holes 332. The redirecting block 33 is made of high-strength wear-resistant steel, and several mounting holes 332 are machined on one side. The mounting holes 332 are countersunk holes with internal threads at the bottom for threaded engagement with countersunk screws. The corresponding mounting holes 332 are machined on the outer circumference of the spindle 32. When the redirecting block 33 is fitted onto the outside of the spindle 32, the mounting holes 332 are aligned with the surface of the spindle 32, and the countersunk screws are screwed into the mounting holes 332 on the outer surface of the redirecting block 33, thus fixing it to the inside of the spindle 32.

[0033] In one embodiment, see Figure 1 and Figure 2As shown, several sets of steam heating pipes 6 are installed in the middle of the mixing silo 2. The principle behind this is to heat the mixture through steam heat exchange. The steam heating pipes 6 are evenly distributed in the middle region of the mixing silo 2, indirectly heating the material in the middle layer to form a stable heat exchange layer. This ensures a uniform temperature gradient throughout the mixing silo 2, guaranteeing consistent heating of each layer and preventing excessive temperature differences between layers that could affect the properties of the mixture. Simultaneously, the weighing component 5 at the bottom of the mixing silo 2 monitors the total weight of the silo in real time, and the control system adjusts the weight accordingly. The weight signal can be used to calculate the material level in the mixing silo 2. When the weight of the mixed material is detected to be lower than the set threshold, the system determines that the material level may not cover all the steam heating pipes 6 and prompts the system to perform a replenishment operation. When the weight of the mixed material is detected to exceed the upper limit, a stop feeding command is issued to prevent material overflow or overfeeding in the mixing silo 2. Through the linkage control of the weighing and heating systems, it is ensured that the material level in the mixing silo 2 can always cover all the steam heating pipes 6 under normal production conditions, so that the steam heating system is always in the effective heat exchange area, achieving stable temperature control and continuous heat preservation.

[0034] In one embodiment, see Figure 1 and Figure 2 As shown, the weighing component 5 includes a support platform 51, which is set on the outer side wall of the mixing silo 2. A flange-type load cell 52 (specifically model YZC-810 load cell) is connected below the support platform 51. The bottom of the flange-type load cell 52 is set on the bottom support platform 4. One flange-type load cell 52 is arranged at each of the four corners of the mixing silo 2. The flange-type load cell 52 can sense the change in the total weight of the mixing silo 2 and the mixture inside it, and transmit the weight signal to the control system in real time to monitor the weight of the mixing silo 2 in real time. The flange-type load cell 52 is equipped with a strain gauge measuring bridge inside. When subjected to compressive load, the elastic body inside the sensor produces a small deformation, and the resistance of the strain gauge changes accordingly. After the electrical signal is output through the Wheatstone bridge, it is converted into a weight signal by the control system to realize the real-time detection of the weight of the mixing silo 2 and the accurate detection of the overall weight of the mixing silo 2, thereby indirectly reflecting the material level and feeding status of the mixture.

[0035] In one embodiment, see Figure 1 and Figure 2 As shown, a ceramic liner 21 is provided on the inner wall of the mixing silo 2. The ceramic liner 21 has a smooth surface and low affinity, which can effectively reduce the friction and adhesion between the high viscosity mixture and the steel plate of the mixing silo 2. This makes it difficult for the mixture to adhere to the inner wall of the mixing silo 2 during free fall and distribution, thus preventing material blockage, local accumulation, or uneven accumulation of the mixture in the silo.

[0036] In one embodiment, see Figure 1 , Figure 2 and Figure 3 As shown, a hydraulic pipeline 7 is connected to one side of the upper part of the hydraulic motor 31. The side of the hydraulic pipeline 7 away from the hydraulic motor 31 is connected to a hydraulic control valve platform 8. The hydraulic motor 31 is fixedly installed above the grid frame 1 of the mixing silo. The hydraulic pipeline 7 is connected to the inlet and outlet oil ports of the motor, and the other end is connected to the hydraulic control valve platform 8 to form a closed oil circuit. The hydraulic control valve platform 8 can be set as a multi-way proportional valve, corresponding to multiple material distribution components 3 respectively. The hydraulic control valve platform 8 realizes the precise start-up and speed regulation of the hydraulic motor 31 by controlling the opening degree, oil flow time and pressure of each valve.

[0037] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A particle size distribution adjustment device for a sintering mixture silo, comprising a mixing silo grid frame (1), wherein the mixing silo grid frame (1) is mounted on a concrete frame (100), characterized in that, The mixing silo grid frame (1) is movably connected to the mixing silo (2). The mixing silo grid frame (1) is provided with several sets of material distribution components (3). The mixing silo (2) is provided with a bottom support platform (4). The bottom support platform (4) is provided with several weighing components (5). The several weighing components (5) are connected to the bottom of the mixing silo (2).

2. The particle size distribution adjustment device for a sintering mixture silo according to claim 1, characterized in that, A floating gap (101) is provided between the concrete frame (100) and the mixing silo (2).

3. The particle size distribution adjustment device for a sintering mixture silo according to claim 1, characterized in that, The fabric assembly (3) includes a hydraulic motor (31), which is mounted on the grid frame (1) of the mixing bin. The output end of the hydraulic motor (31) is fixedly connected to a main shaft (32), and a number of redirecting blocks (33) are mounted on the main shaft (32).

4. The particle size distribution adjustment device for a sintering mixture silo according to claim 3, characterized in that, The mixing silo grid frame (1) is also provided with a bearing seat (34), and the main shaft (32) is rotatably connected in the bearing seat (34).

5. The particle size distribution adjustment device for a sintering mixture silo according to claim 3, characterized in that, The redirecting block (33) is provided with a through hole (331), and a main shaft (32) is fixedly connected inside the through hole (331).

6. The particle size distribution adjustment device for a sintering mixture silo according to claim 5, characterized in that, The redirection block (33) is provided with mounting holes (332).

7. The particle size distribution adjustment device for a sintering mixture silo according to claim 1, characterized in that, Several sets of steam heating pipes (6) are provided in the middle of the mixing silo (2).

8. The particle size distribution adjustment device for a sintering mixture silo according to claim 1, characterized in that, The weighing component (5) includes a support platform (51), which is located on the outer side wall of the mixing silo (2). A flange column type weighing sensor (52) is connected below the support platform (51), and the bottom of the flange column type weighing sensor (52) is located on the bottom support platform (4).

9. The particle size distribution adjustment device for a sintering mixture silo according to claim 1, characterized in that, The inner wall of the mixing silo (2) is provided with a ceramic liner (21).

10. The particle size distribution adjustment device for a sintering mixture silo according to claim 3, characterized in that, The upper side of the hydraulic motor (31) is also connected to a hydraulic pipe (7), and the side of the hydraulic pipe (7) away from the hydraulic motor (31) is connected to a hydraulic control valve platform (8).

Images