A sintering and loosening device and a sinter loosening system
By designing hollow tubular loose material bars with multi-dimensional void channels and a compressed air supply system, the problem of blind spots in improving the permeability of sintering material layers was solved, and efficient production of sintered ore was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHOUGANG QIANAN IRON & STEEL CO LTD
- Filing Date
- 2026-05-22
- Publication Date
- 2026-07-21
AI Technical Summary
Existing loosening devices cannot effectively improve the air permeability of the upper part of the sintering layer, which limits the improvement of sintering efficiency and quality.
A hollow tubular loosening bar is designed with spray holes spaced along its length and connected to a compressed air supply system to form a multi-dimensional void channel. Compressed air spraying and pulse control devices are used to ensure unobstructed channels and improve the air permeability of the material layer.
This achieved a comprehensive improvement in the permeability of the sintering bed, ensuring a balanced airflow distribution and increasing the yield and quality of sintered ore.
Smart Images
Figure CN122429601A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of sintering production technology, and in particular to a sintering loosening device and a sintering ore loosening system. Background Technology
[0002] In sintering production, the loosener is a key piece of equipment for improving the permeability of the sintering bed. Currently, the most commonly used looseners are single- or double-layered loosening rods, which optimize airflow distribution by creating regular gaps at the bottom of the sintering bed. However, this type of loosener only improves the permeability of the bottom region of the bed and cannot loosen the upper and middle parts, creating a blind spot in permeability improvement and hindering further improvements in sintering efficiency and quality. Summary of the Invention
[0003] This application provides a sintering loosening device and a sintering ore loosening system.
[0004] The first aspect of this disclosure provides a sintering loosening device, including a loosening rod, which is a hollow tubular structure, and a plurality of spray holes are spaced apart along the length of the loosening rod; and a compressed air supply system, which is connected to the hollow tubular structure.
[0005] In some embodiments, the loosening bar includes a first loosening bar and a second loosening bar; the first loosening bar is disposed along a first direction; the second loosening bar is disposed along a second direction, the first direction intersecting the second direction; wherein the first loosening bar and the second loosening bar are connected and communicate with each other.
[0006] In some embodiments, the compressed air supply system includes a compressed air duct, which is arranged in a third direction; The intersection of any two of the first, second, and third directions is set; There are multiple first loosening bars and multiple second loosening bars, and the multiple first loosening bars are spaced apart along the length of the compressed air pipe and are all connected to the compressed air pipe. Each first loosening bar has multiple second loosening bars spaced apart along its length, and one end of each of the multiple second loosening bars is connected to the first loosening bar.
[0007] In some embodiments, the loosening bar further includes a third loosening bar, which is parallel to and spaced apart from the first loosening bar, and the third loosening bar is connected to the other end of a plurality of second loosening bars.
[0008] In some embodiments, the extension directions of the second loosening bars on each first loosening bar are consistent; The second loosening bars on two adjacent first loosening bars extend in opposite directions.
[0009] In some embodiments, the compressed air supply system includes a pulse control device configured to control compressed air to be ejected from the nozzle in a pulsed manner.
[0010] In some embodiments, the compressed air supply system further includes a control unit configured to receive a negative pressure signal of the sintering bed and adjust the blowing frequency of the pulse control device according to the signal.
[0011] In some embodiments, the first loosening bar, the second loosening bar, and the compressed air duct are all made of stainless steel. The diameter of the blow holes ranges from 0.5mm to 2.5mm, and the spacing between adjacent blow holes ranges from 5mm to 15mm.
[0012] In some embodiments, a support beam is also included, which is arranged along a third direction and fixed to the sintering machine frame, and a compressed air duct is fixedly arranged on the support beam.
[0013] The second aspect of this disclosure provides a sintered ore loose material system, including a buffer ore bin for storing sintered mixtures; Mud rollers, located below the buffer trough, are used to control the flow rate of the mixture; A nine-roller distributor, located below the mud rollers, is used to evenly distribute the mixture. A sintering trolley for carrying the mixed material after it has been spread; and a sintering loosening device as described in the first aspect, wherein the sintering loosening device is spaced apart from the bottom wall of the sintering trolley.
[0014] Compared to existing technologies, the sintering loosening device provided by this invention uses loosening rods inserted into the material layer to form void channels. Continuous or pulsed compressed air jets prevent moist materials from adhering to the rods, keeping the channels consistently unobstructed. The jetting airflow further loosens surrounding materials, further evenly distributing the airflow and comprehensively improving the permeability of the material layer. Ultimately, this achieves balanced airflow distribution and complete combustion during the sintering process, thereby increasing the yield and quality of sintered ore. Attached Figure Description
[0015] Figure 1 A simplified schematic diagram of the sintering loosening device provided for the purposes of this disclosure; Figure 2 A simplified first-view schematic diagram of a sintered ore loose material system provided for the purposes of this disclosure; Figure 3 A simplified second-view schematic diagram of a sintered ore loose material system provided for the purposes of this disclosure.
[0016] Numbering on the map: a. First direction; b. Second direction; c. Third direction; 01. Sintering loosening device; 10. Loosening bar; 11. Blowing hole; 12. First loosening bar; 13. Second loosening bar; 14. Third loosening bar; 20. Compressed air supply system; 21. Compressed air duct; 22. Control unit; 30. Support beam; 40. Buffer ore bin; 50. Mud roller; 60. Nine-roller feeder; 70. Sintering trolley. Detailed Implementation
[0017] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.
[0018] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.
[0019] like Figure 1 As shown, the first aspect of this disclosure proposes a sintering loosening device 01, including a loosening rod, which is a hollow tubular structure, and a plurality of spray holes are spaced apart along the length of the loosening rod; a compressed air supply system, which is connected to the hollow tubular structure.
[0020] Understandably, the loosening rod has a hollow tubular structure, serving the dual function of mechanically loosening the material layer and conveying compressed air. The injection holes, which are spaced apart along the length of the loosening rod, are used to directionally and uniformly inject compressed air into the sintering material layer.
[0021] A compressed air supply system serves as both an air source supply and control system. It generates and provides a stable and controllable flow of compressed air.
[0022] The outlet of the compressed air supply system can be sealed and connected to the hollow cavity of the loosened material bar through a compressed air pipe, forming a closed air passage. Multiple injection holes are distributed on the wall of the loosened material bar immersed in the sintering material layer, with the openings facing the surrounding material.
[0023] The sintering loosening device 01 disclosed herein uses loosening rods inserted into the material layer to form void channels. Continuous or pulsed compressed air jets prevent moist materials from adhering to the rods, keeping the channels consistently unobstructed. The jetting airflow further loosens surrounding materials, further evenly distributing the airflow and comprehensively improving the permeability of the material layer. Ultimately, this achieves balanced airflow distribution and complete combustion during the sintering process, thereby increasing the yield and quality of sintered ore.
[0024] In some embodiments, the loosening bar includes a first loosening bar and a second loosening bar; the first loosening bar is disposed along a first direction; the second loosening bar is disposed along a second direction, the first direction intersecting the second direction; wherein the first loosening bar and the second loosening bar are connected and communicate with each other.
[0025] Understandably, the first and second loosening bars are mechanically connected and have air passages through welding or special pipe fittings, thus forming a multi-dimensional three-dimensional loosening frame. The second loosening bar can be connected as a branch pipe to the first loosening bar, which serves as the main air supply duct, forming a "tree-like" or "grid-like" air supply network structure.
[0026] Among them, the first direction rod can form a longitudinal loose channel, and the second direction rod can form a transverse or vertical loose channel.
[0027] The connection and interconnection between the first and second loosening bars can create a multi-dimensional, interconnected spatial network in the sintering material layer, eliminate blind spots in air permeability, and ensure that compressed airflow can be distributed to each of the second loosening bars through the first loosening bar (or vice versa), achieving unified air supply from one air source inlet to all blow holes.
[0028] The first direction can be parallel to the running direction or the length direction of the sintering trolley. The function of the first loosening bar set in this direction is to form longitudinal loose grooves in the material layer that extend along the direction of trolley movement, providing a low-resistance main channel for airflow.
[0029] The second direction can be perpendicular to the bottom surface of the sintering trolley or the height direction of the trolley sideboard. The function of the second loosening bar, set in this direction, is to penetrate deep into the material layer and establish transverse or vertical connecting channels between the longitudinal channels formed by the first loosening bar, forming a continuous spatial network.
[0030] The first and second directions intersect and can be perpendicular to each other, thus forming a three-dimensional porous framework. This ensures that the porous structure is effectively distributed in the length, width, and height of the sintered material layer, achieving a comprehensive and three-dimensional improvement in the permeability of the material layer.
[0031] In some embodiments, the compressed air supply system includes a compressed air duct, which is arranged along a third direction; any two of the first direction, the second direction, and the third direction intersect; there are multiple first loosening bars and multiple second loosening bars, and the multiple first loosening bars are spaced apart along the length direction of the compressed air duct and are all connected to the compressed air duct; each first loosening bar is spaced apart along the length direction with multiple second loosening bars, and one end of the multiple second loosening bars is connected to the first loosening bar.
[0032] Understandably, the compressed air duct, as the main air supply duct, is responsible for distributing compressed air to each of the first loosening bars. The compressed air duct, which is set along a third direction, can be set parallel to the width of the trolley.
[0033] The first loosening bar, serving as a secondary distribution pipeline, has its inlet connected to the compressed air duct and its outlet connected to the second loosening bar. Multiple first loosening bars are spaced apart along the length of the compressed air duct to achieve uniform distribution of airflow along the length of the compressed air duct.
[0034] The second easing bar, acting as an end-effector, is connected to the first easing bar, and compressed air is directly injected into the material layer through nozzles on its wall. Multiple second easing bars are spaced apart along the length of the first feed bar, achieving airflow coverage in either the height or width direction. This structure enables efficient and uniform distribution of compressed air from a single source to a wide area within the material layer. It significantly expands the permeability improvement area, eliminates dead zones in airflow distribution, and provides structural assurance for obtaining uniform and high-quality sinter.
[0035] In some embodiments, the loosening bar further includes a third loosening bar, which is parallel to and spaced apart from the first loosening bar, and the third loosening bar is connected to the other end of a plurality of second loosening bars.
[0036] The third loosening bar is oriented in the same direction as the first loosening bar. Together with the first loosening bar, the third loosening bar forms a stable rigid frame, greatly enhancing the stability of the entire loosening device structure. The second loosening bar, positioned between the first and third loosening bars, prevents it from sagging or deforming due to material scouring or its own weight. Furthermore, the third loosening bar provides support and a fixing point at the other end of the second loosening bar, forming a closed load-bearing structure. The third loosening bar is a hollow tubular structure, connected to the second loosening bar, which helps to further equalize the air pressure within the entire frame, making the airflow from each nozzle more uniform.
[0037] The third loose bar is parallel to the first loose bar in spatial position, and the two together serve as the main beam. The two ends of multiple second loose bars are sealed to the first and third loose bars through pipe joints or welding, thus forming a complete, closed ladder-shaped or grid-shaped three-dimensional frame structure.
[0038] It can significantly improve structural strength, effectively resist the impact of sintering materials and equipment vibration, and extend service life. It also reduces airflow dead zones, which helps to achieve a more uniform blowing effect.
[0039] In some embodiments, the extension directions of the second unclogs on each first unclog bar are consistent; the extension directions of the second unclogs on two adjacent first unclog bars are opposite.
[0040] Understandably, all the second loosening bars set on the same first loosening bar act on the same depth area of the material layer, forming a uniform loose surface.
[0041] The staggered arrangement of adjacent rows of second loose material bars in the material layer, with their alternating opposite directions, creates a more uniform, dead-zone-free void distribution along the height of the material layer. This avoids the uneven airflow channels or loose blind spots that might occur when all the second loose material bars face the same side. This allows airflow to penetrate the entire cross-section of the material layer more evenly, effectively eliminating the linear airflow channels and uneven areas that may exist in traditional parallel arrangements. Consequently, it significantly and consistently improves the overall permeability of the material layer, laying a solid foundation for stabilizing and improving the quality of sintered ore.
[0042] In some embodiments, the compressed air supply system includes a pulse control device configured to control compressed air to be ejected from the nozzle in a pulsed manner.
[0043] Understandably, a pulse control device consists of a pulse valve (such as a solenoid pulse valve) and its control circuit, used to periodically and rapidly open and close the compressed air path. The pulse control device, receiving commands from the control unit, periodically switches the compressed air supply on and off at a specific frequency and duty cycle. When the air path is momentarily opened, a high-pressure, transient pulse of compressed air flows through the hollow loosening bar and is ejected at high speed from the nozzle; when the air path is cut off, the blowing stops. This cycle repeats, creating a pulsed blowing effect.
[0044] The instantaneously released pulsed airflow has higher kinetic energy, which can more effectively break up and remove the material that begins to adhere to the loosening bar, or prevent new material from adhering. The anti-sticking effect is better than continuous blowing. Moreover, the instantaneous impact force of the pulsed airflow is stronger, which can more effectively penetrate and loosen the surrounding sintered material, thereby forming and maintaining better void channels.
[0045] In some embodiments, the compressed air supply system further includes a control unit configured to receive a negative pressure signal of the sintering bed and adjust the blowing frequency of the pulse control device according to the signal.
[0046] Understandably, the control unit, as the core decision-making module of the system, is composed of a PLC (Programmable Logic Controller) or an industrial computer. It is capable of processing input signals and issuing control commands. The negative pressure signal of the sintering bed, as a process feedback signal, is a key parameter characterizing the permeability of the sintering bed. An increase in negative pressure usually means that the permeability of the bed has deteriorated and the resistance has increased.
[0047] The control unit establishes a communication connection with the negative pressure sensor installed on the sintering air box or main flue via a data cable to continuously receive real-time negative pressure signals. The control unit internally presets or dynamically generates a "negative pressure-frequency" control logic through an algorithm.
[0048] When the received negative pressure signal is higher than the preset threshold (indicating poor air permeability), the control unit sends a command to the pulse control unit to increase the pulse jet frequency, thereby clearing the material layer in a more powerful way and reducing resistance.
[0049] When the received negative pressure signal decreases or returns to the normal range (indicating good air permeability), the control unit outputs a command to reduce the pulse jet frequency or maintain the base frequency, saving energy while ensuring effectiveness.
[0050] In some embodiments, the first loosening bar, the second loosening bar, and the compressed air duct are all made of stainless steel. The diameter of the blow holes ranges from 0.5mm to 2.5mm, and the spacing between adjacent blow holes ranges from 5mm to 15mm.
[0051] Understandably, the first loosening bar, the second loosening bar, and the compressed air duct are all made of stainless steel, providing excellent high-temperature oxidation resistance, corrosion resistance, and wear resistance. This ensures that the equipment can work stably for a long time in the harsh environment of high temperature, high humidity, and dust at the head of the sintering machine, avoiding damage and air blockage caused by rust or wear, and significantly extending the service life of the equipment.
[0052] Because the nozzle diameter is small enough, it can generate enough momentum to ensure that the ejected airflow has a high velocity under limited air source pressure, and has good penetration and unblocking capabilities.
[0053] The nozzle spacing is matched with the nozzle diameter to ensure a continuous and uniform air curtain or needle action zone along the length of the loosening bar, avoiding unaffected airflow blind spots. The use of stainless steel fundamentally improves the durability and reliability of the device, reducing maintenance costs. Precisely defining the nozzle diameter and spacing optimizes compressed air utilization efficiency, ensuring uniform airflow distribution along the entire length of the loosening bar, sufficient power, and minimal clogging.
[0054] This together ensures that the loosening device can perform its core function of improving the permeability of the material layer in a long-term, stable, and efficient manner under harsh working conditions.
[0055] In some embodiments, a support beam is also included, which is arranged along a third direction and fixed to the sintering machine frame, and a compressed air duct is fixedly arranged on the support beam.
[0056] As the core load-bearing and installation foundation of the entire loosening device, the support beam reliably transfers and distributes the weight of the loosening device (including the compressed air duct and all loosening bars), the impact force of the material, and the vibration load of the equipment to the robust main frame of the sintering machine, rather than being borne by the flexible air duct or other equipment connected to it. The support beam is typically positioned spatially parallel to the width of the trolley (i.e., the third direction). The compressed air duct is fixed below or to the side of the support beam, and the loosening bars are then fixed and connected to the compressed air duct. The support beam is fixedly connected to the sintering machine frame, effectively preventing swaying or displacement due to stress during operation, ensuring its spatial stability. Furthermore, the support beam can isolate and attenuate vibrations transmitted from the sintering machine to a certain extent, which helps protect the delicate pneumatic control components.
[0057] like Figure 2-3 As shown, the second aspect proposes a sintered ore loose material system, including a buffer ore bin for storing sintered mixture; Mud rollers, located below the buffer trough, are used to control the flow rate of the mixture; A nine-roller distributor, located below the mud rollers, is used to evenly distribute the mixture. A sintering trolley for carrying the mixed material after it has been spread; and a sintering loosening device 01 as described in the first aspect, wherein the sintering loosening device 01 is spaced apart from the bottom wall of the sintering trolley.
[0058] Understandably, the buffer trough temporarily stores the mixture, ensuring a continuous and stable supply; the mud roller, as the core feeder, controls the final thickness of the material layer laid on the sintering trolley through its rotational speed; the nine-roller distributor disperses and scatters the concentrated material ridges provided by the mud roller, achieving uniform material distribution; the sintering trolley carries the mixture layer and guides it through the sintering machine to complete the sintering process. The sintering loosening device 01, placed inside the sintering trolley and spaced from its bottom wall, creates a three-dimensional void in the material flow. This ensures that the trolley will not interfere with or collide with the fixed loosening device during its movement, guaranteeing safe operation.
[0059] The sintering loosening device 01 is 100mm above the bottom wall of the sintering trolley and 100mm above the side panels on both sides of the sintering trolley.
[0060] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0061] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
[0062] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.
[0063] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.
Claims
1. A sintering loosening device, characterized in that, include: The loosening bar is a hollow tubular structure, and the loosening bar is provided with multiple spray holes at intervals along its length; A compressed air supply system, wherein the compressed air supply system is connected to the hollow tubular structure.
2. The sintering loosening device according to claim 1, characterized in that, The loosening bar includes a first loosening bar and a second loosening bar; The first loosening bar is arranged along the first direction; The second loosening bar is arranged along the second direction, and the first direction intersects the second direction; The first loosening bar is connected to and communicates with the second loosening bar.
3. The sintering loosening device according to claim 2, characterized in that, The compressed air supply system includes a compressed air duct, which is arranged along a third direction; The first direction, the second direction, and the third direction are intersecting at any two of them; There are multiple first loosening rods and multiple second loosening rods, and the multiple first loosening rods are spaced apart along the length of the compressed air pipe and are all connected to the compressed air pipe; Each first loosening bar has multiple second loosening bars spaced apart along its length, and one end of each of the multiple second loosening bars is connected to the first loosening bar.
4. The sintering loosening device according to claim 3, characterized in that, The loosening bar also includes: The third loosening bar is parallel to and spaced apart from the first loosening bar, and the third loosening bar is connected to the other end of the plurality of second loosening bars.
5. The sintering loosening device according to claim 3 or 4, characterized in that, The second loosening rods on each of the first loosening rods extend in the same direction; The second loosening bars on two adjacent first loosening bars extend in opposite directions.
6. The sintering loosening device according to claim 1, characterized in that, The compressed air supply system includes a pulse control device configured to control the compressed air to be ejected from the nozzle in a pulse manner.
7. The sintering loosening device according to claim 6, characterized in that, The compressed air supply system also includes: The control unit is configured to receive a negative pressure signal of the sintering material layer and adjust the blowing frequency of the pulse control device according to the signal.
8. The sintering loosening device according to claim 2, characterized in that, The first loosening bar, the second loosening bar, and the compressed air duct are all made of stainless steel. The diameter of the blow holes ranges from 0.5mm to 2.5mm, and the spacing between adjacent blow holes ranges from 5mm to 15mm.
9. The sintering loosening device according to claim 3, characterized in that, Also includes: A support beam is provided along the third direction and fixed to the frame of the sintering machine, and the compressed air duct is fixedly provided on the support beam.
10. A sintered ore loose material system, characterized in that, include: Buffer bins are used to store sintering mixtures; A mud roller, positioned below the buffer trough, is used to control the flow rate of the mixture; A nine-roller distributor is positioned below the mud rollers to distribute the mixture evenly. Sintering trolley, used to carry the mixed material after it has been spread out; And the sintering loosening device as described in any one of claims 1-9, wherein the sintering loosening device is spaced apart from the bottom wall of the sintering trolley.