Industrial production system and production method for steel slag sand

Abstract

The invention belongs to the field of steel slag sand, and particularly relates to a steel slag sand industrial production system and method. The steel slag sand industrial production system comprises a feeding unit, a loading unit, a ferrying unit, a high-temperature and high-pressure digestion unit, a third track and a fourth track, wherein the third track and the fourth track are parallel to each other. The ferrying unit comprises a first track and a fifth track which are positioned at the two ends of the high-temperature and high-pressure digestion unit, and a ferrying trolley which can move along the first track and the fifth track respectively. The ferry trolley is provided with a ferry rail which can be connected with or separated from a second rail in the high-temperature and high-pressure digestion unit through movement, and the ferry trolley can also push and pull the loading unit so as to enable the loading unit to enter and exit from the high-temperature and high-pressure digestion unit. The steel slag sand industrial production system which is reasonable in structure, stable in operation and high in automation degree is constructed through the ferrying unit, and the problems that a loading unit enters and exits from the still kettle inconveniently and is discontinuous in operation are solved.

Description

Technical Field

[0001] This invention relates to the field of steel slag sand technology, specifically to an industrial production system and method for steel slag sand. Background Technology

[0002] Steel production generates a large amount of steel slag, accounting for approximately 10-20% of crude steel output. With increasing steel production, my country's steel slag reserves have exceeded 200 million tons. As a byproduct of steel production, steel slag is often referred to as "overburned silicate clinker." Currently, steel slag is typically simply stockpiled, a method that consumes significant land resources and may cause environmental pollution.

[0003] In recent years, with the increasing demand for construction and infrastructure projects, and especially the gradual depletion of natural sand resources, the efficient utilization of steel slag has become a research hotspot. Converting steel slag into high-quality building material—steel slag sand—can not only significantly reduce environmental pollution risks but also effectively alleviate the challenges posed by the shortage of natural sand. This not only promotes resource recycling but also provides a new solution for environmental protection.

[0004] Patent application number 202110289287.4 discloses a steel slag sand production process. Through crushing, screening, iron removal, spraying, and high-temperature, high-pressure digestion in an autoclave, steel slag is converted into steel slag sand, which can replace natural sand and manufactured sand. Although the patent application describes a steel slag sand production system including a crushing unit, an iron removal unit, a charging unit, a spraying device, a high-temperature, high-pressure digestion unit, and a cooling and grading unit, the large volume of steel slag processed makes large-scale industrial production of steel slag sand difficult using only this system. Currently, this system still has the following problems:

[0005] Railcars carrying tons or even tens of tons of steel slag can move along external tracks to enter the autoclave for high-temperature, high-pressure slag digestion. To facilitate the opening and closing of the autoclave door, there is a transition zone between the external and internal tracks during the railcar's movement into the autoclave. Due to structural design limitations, the tracks in this zone cannot be laid continuously, resulting in a lack of stable support and guidance for the railcar during the critical stage of entering the autoclave. This not only increases the difficulty of railcar propulsion and positioning but also affects the continuity and automation level of the entire production process, thus restricting the efficiency and stability of the system in large-scale industrial production.

[0006] Therefore, a steel slag sand production system that allows railcars to easily enter and exit the autoclave is needed. Summary of the Invention

[0007] (a) Technical problems to be solved

[0008] To address the problem of inconvenience in the entry and exit of railcars loaded with steel slag from autoclaves in existing technologies, this invention provides an industrialized steel slag sand production system and method.

[0009] (II) Technical Solution

[0010] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0011] This invention provides an industrial production system for steel slag sand, including a feeding unit, a loading unit, a transfer unit, a high-temperature and high-pressure digestion unit, and a third track and a fourth track that are parallel to each other.

[0012] The feeding unit is used to load steel slag into the loading unit, the ferry unit is used to move the loading unit into and out of the high temperature and high pressure digestion unit and bring the unloaded loading unit back to the third track, and the high temperature and high pressure digestion unit is used to perform high temperature and high pressure digestion treatment on the steel slag.

[0013] The transfer unit includes a first track and a fifth track located at both ends of the high-temperature and high-pressure digestion unit, as well as a transfer trolley that can move along the first track and the fifth track respectively; the first track and the fifth track are perpendicular to the movement direction of the loading unit;

[0014] The shuttle trolley is equipped with a shuttle track, which can be connected to or separated from the second track inside the high-temperature and high-pressure digestion unit by moving; the shuttle trolley can also enter and exit the high-temperature and high-pressure digestion unit by pushing and pulling the loading unit.

[0015] The third track is perpendicular to the first and fifth tracks, and parallel to the second track inside the high-temperature and high-pressure digestion unit.

[0016] The steel slag sand industrial production system described above preferably includes a transfer trolley further comprising a main body, a first push-pull structure, a telescopic structure, and a second push-pull structure; the first push-pull structure is mounted on the main body, and the transition track and the second push-pull structure are both mounted on the telescopic structure.

[0017] The first push-pull structure uses a push-pull telescopic structure to connect or separate the transition track from the second track inside the high-temperature and high-pressure digestion unit; the second push-pull structure uses a push-pull loading unit to allow it to enter and exit the high-temperature and high-pressure digestion unit.

[0018] In the steel slag sand industrial production system described above, preferably, the first push-pull structure is a positioning push rod, and the second push-pull structure is a multi-stage push-pull hydraulic cylinder.

[0019] The main body includes a frame, a travel transmission structure, and track wheels; the travel transmission structure and track wheels are mounted on the frame, and the travel transmission structure is driven and connected to the track wheels.

[0020] In the steel slag sand industrial production system described above, preferably, the loading unit includes multiple rail trolleys, which are capable of moving along a third track and / or a fourth track; the rail trolley moves from the third track to the shuttle track, then follows the shuttle trolley along the first track, and then leaves the shuttle track and enters the fourth track.

[0021] The feeding unit feeds the trolley on the third track. After the steel slag is processed by high temperature and high pressure, the trolley loaded with steel slag sand moves to the fourth track through the transfer unit, and then moves to the other end of the fourth track for unloading. After unloading, the empty trolley returns to the third track through the transfer unit.

[0022] In the steel slag sand industrial production system described above, preferably, the track trolley includes a hopper, the hopper has multiple pipes with openings at both ends, the pipes penetrate the hopper body, and the two ends of the pipes are connected to the hopper; the upper end of the hopper is open for loading steel slag.

[0023] Multiple tubes are parallel to each other, and multiple tubes located in the same column in the vertical direction are on the same vertical plane;

[0024] The distance between adjacent pipes is ≤50cm, and the diameter of the pipe is ≤15dm.

[0025] The steel slag sand industrial production system described above preferably includes a feeding unit comprising a feeding belt conveyor and a loading hopper connected to the feeding belt conveyor.

[0026] The loading hopper is located above the rail trolley and above the third track. The feeding belt conveyor is used to transport steel slag to the loading hopper, which is used to load the steel slag into the rail trolley. The loading hopper is also used to load water into the rail trolley.

[0027] The steel slag sand industrial production system described above preferably further includes a discharge unit, which includes a tilting unloader and a finished product belt conveyor, with the tilting unloader located on the fourth track.

[0028] The tipping unloader is used to tip the railcart located on the fourth track after the high temperature and high pressure digestion process is completed, so that the steel slag sand falls onto the finished product belt conveyor.

[0029] In the steel slag sand industrial production system described above, preferably, the high-temperature and high-pressure digestion unit includes multiple autoclaves arranged in parallel;

[0030] The autoclave includes an autoclave body, a second track disposed inside the autoclave body, an autoclave door, and a crank arm;

[0031] The autoclave door includes an inner door and an outer door. The inner door is hinged to the autoclave body, and the outer door is rotatably connected to the inner door.

[0032] The two ends of the crank arm are respectively hinged to the autoclave body and the outer door, and the outer door can rotate relative to the crank arm;

[0033] The autoclave body and outer door are respectively equipped with slots and teeth. The autoclave body is equipped with a door opening and closing structure, and the outer door is equipped with a connecting plate.

[0034] This invention also provides an industrial production method for steel slag sand, comprising the following steps:

[0035] S1: The feeding unit loads the steel slag into the loading unit, and the loading unit moves along the third track to the end facing the autoclave door;

[0036] S2: The shuttle trolley moves along the first track to the transition track and connects with the third track. Then the loading unit moves from the third track to the transition track.

[0037] S3: Open the autoclave door, the shuttle trolley carrying the loading unit moves along the first track, so that the transition track and the second track are on the same straight line. Then the first push-pull structure pushes out the telescopic structure, so that the transition track and the second track are connected. Then the second push-pull structure pushes the loading unit into the second track.

[0038] S4: The second push-pull structure retracts to its original position, the first push-pull structure pulls the telescopic structure back to its original position, separating the transition track from the second track, and then the autoclave door is closed;

[0039] S5: The steel slag is subjected to high-temperature and high-pressure digestion treatment through a high-temperature and high-pressure digestion unit, and then cooled after the treatment is completed;

[0040] S6: Open the autoclave door again. The first push-pull structure pushes out the telescopic structure, connecting the transition track with the second track. The second push-pull structure extends again and contacts the loading unit. Then, the second push-pull structure retracts, moving the loading unit onto the transition track. After that, the first push-pull structure pulls the telescopic structure back to its original position, separating the transition track from the second track. Then, the shuttle trolley carries the loading unit along the first track until the transition track connects with the fourth track. After that, the second push-pull structure pushes the loading unit into the fourth track.

[0041] S7: The loading unit moves to the other end of the fourth track for unloading. After unloading, the loading unit returns to the third track via a shuttle trolley located at the other end of the high-temperature and high-pressure digestion unit.

[0042] In the above-described industrial production method of steel slag sand, preferably, in step S7, after unloading, the shuttle trolley located at the other end of the high-temperature and high-pressure digestion unit moves along the first track to the transition track and connects with the fourth track. The second push-pull structure extends and contacts the loading unit. Then, the second push-pull structure retracts, driving the loading unit to move from the fourth track to the transition track. Then, the shuttle trolley carries the loading unit along the first track until the transition track connects with the third track. After that, the second push-pull structure pushes the loading unit into the third track.

[0043] (III) Beneficial Effects

[0044] In this invention, the shuttle trolley has a transition track that can connect or separate from a second track inside the high-temperature, high-pressure digestion unit by moving, thereby providing a passageway for the loading unit to enter the high-temperature, high-pressure digestion unit. The shuttle trolley can also push and pull the loading unit to enter and exit the high-temperature, high-pressure digestion unit, achieving efficient material loading and unloading and high-temperature, high-pressure processing. This invention not only improves the stability and controllability of the loading unit's entry and exit from the high-temperature, high-pressure digestion unit, but also significantly enhances the continuity and automation of the steel slag sand production system, providing reliable equipment support for the large-scale industrial production of steel slag sand.

[0045] This invention also achieves circular operation of the loading unit by rationally arranging the perpendicular relationship between the first track and the running direction of the loading unit, combined with the multi-degree-of-freedom movement of the shuttle trolley. This enables the loading unit to achieve continuous material conveying and processing, significantly improving the utilization efficiency of the loading unit and the overall capacity of the system. After completing the high-temperature and high-pressure digestion treatment of steel slag, the loading unit is pulled out of the high-temperature and high-pressure digestion unit. After unloading, it switches its running path and returns to its original position via the shuttle unit at the other end, automatically returning to the location of the loading unit. It is then reloaded with steel slag and re-enters the high-temperature and high-pressure treatment stage, forming a closed-loop operation mode. This achieves a seamless production rhythm, with the loading unit utilization rate reaching 100%, greatly improving the operating efficiency and stability of the steel slag sand production line. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the overall structure of the industrialized steel slag sand production system in this invention;

[0047] Figure 2 This is a front view of the track trolley in this invention;

[0048] Figure 3 This is a left view of the track trolley in this invention;

[0049] Figure 4 This is a top view of the track trolley in this invention;

[0050] Figure 5This is a front view of the shuttle vehicle in this invention;

[0051] Figure 6 This is a left view of the shuttle vehicle in this invention;

[0052] Figure 7 This is a top view of the shuttle vehicle in this invention;

[0053] Figure 8 for Figure 1 The right view;

[0054] Figure 9 This is a schematic diagram of the process of the track trolley entering the autoclave in this invention;

[0055] Figure 10 This is a schematic diagram of the process of the track trolley pulling out the autoclave in this invention;

[0056] Figure 11 This is a front view of the autoclave in this invention;

[0057] Figure 12 This is a left view of the autoclave in this invention;

[0058] Figure 13 This is a top view of the autoclave in this invention;

[0059] Figure 14 for Figure 12 A magnified view of a portion of the image;

[0060] Figure 15 This is a block diagram of the automated control system in this invention.

[0061] [Explanation of Labels in the Attached Image]

[0062] 1: Feeding unit; 2: Loading unit; 3: Transfer unit; 4: High-temperature and high-pressure digestion unit;

[0063] 5: Unloading unit; 51: Tilting unloader; 52: Finished product belt conveyor;

[0064] 6: First track; 7: Third track; 8: Fourth track;

[0065] 9: Shuttle bus;

[0066] 10: Body; 101: Frame; 102: Walking transmission structure; 103: Track wheels;

[0067] 11: First push-pull structure; 12: Telescopic structure; 13: Transition track; 14: Second push-pull structure;

[0068] 15: Track trolley; 151: Hopper; 152: Pipe body;

[0069] 16: Feeding belt conveyor; 17: Material loading hopper;

[0070] 18: Autoclave; 181: Autoclave body; 182: Autoclave door; 183: Arm;

[0071] 19: Locking teeth;

[0072] 20: Door opening and closing structure; 201: Motor; 202: Lead screw; 203: Nut; 204: Moving pin;

[0073] 21: Connecting plate; 22: Fixed connector; 23: Movable connector; 24: Fifth track. Detailed Implementation

[0074] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0075] like Figure 1-14 As shown, the present invention provides an industrial production system for steel slag sand, including a feeding unit 1, a loading unit 2, a transfer unit 3, a high-temperature and high-pressure digestion unit 4, and a third track 7 and a fourth track 8 that are parallel to each other.

[0076] The feeding unit 1 is used to load steel slag into the loading unit 2, the transfer unit 3 is used to move the loading unit 2 into and out of the high temperature and high pressure digestion unit 4, and to bring the unloaded loading unit 2 back to the third track 7. The high temperature and high pressure digestion unit 4 is used to perform high temperature and high pressure digestion treatment on the steel slag.

[0077] The transfer unit 3 includes a first track 6 and a fifth track 24 located at both ends of the high-temperature and high-pressure digestion unit 4, and a transfer trolley 9 that can move along the first track 6 respectively. The first track 6 and the fifth track 24 are perpendicular to the movement direction of the loading unit 2 (the extension direction of the high-temperature and high-pressure digestion unit).

[0078] The shuttle trolley 9 is equipped with a shuttle track 13, which can be connected to or separated from the second track inside the high-temperature and high-pressure digestion unit 4 by movement. The shuttle trolley 9 can also enter and exit the high-temperature and high-pressure digestion unit 4 by pushing and pulling the loading unit 2. The third track 7 is perpendicular to the first track 6 and the fifth track, and parallel to the second track inside the high-temperature and high-pressure digestion unit 4.

[0079] like Figure 5-7As shown, the shuttle trolley 9 specifically includes a body 10, a first push-pull structure 11 and a telescopic structure 12 disposed on the body 10, and a transition track 13 and a second push-pull structure 14 disposed on the telescopic structure 12. The first push-pull structure 11 connects or separates the transition track 13 from the second track inside the high-temperature and high-pressure digestion unit 4 by pushing and pulling the telescopic structure 12. The second push-pull structure 14 allows the loading unit 2 to enter and exit the high-temperature and high-pressure digestion unit 4 by pushing and pulling the loading unit 2.

[0080] In this invention, the shuttle trolley has a transition track that can connect or separate from a second track inside the high-temperature, high-pressure digestion unit by moving, thereby providing a passageway for the loading unit to enter the high-temperature, high-pressure digestion unit. The shuttle trolley can also push and pull the loading unit to enter and exit the high-temperature, high-pressure digestion unit, achieving efficient material loading and unloading and high-temperature, high-pressure processing. This invention not only improves the stability and controllability of the loading unit's entry and exit from the high-temperature, high-pressure digestion unit, but also significantly enhances the continuity and automation of the steel slag sand production system, providing reliable equipment support for the large-scale industrial production of steel slag sand.

[0081] Preferably, the first push-pull structure 11 can be a positioning push rod, and the second push-pull structure 14 can be a multi-stage push-pull hydraulic cylinder. The main body 10 specifically includes a frame 101, a travel transmission structure 102, and track wheels 103. The travel transmission structure 102 and track wheels 103 are mounted on the frame 101, and the travel transmission structure 102 is drivenly connected to the track wheels 103.

[0082] The positioning push rod provides precise linear motion, ensuring seamless connection or separation between the transition track 13 and the second track. Through high-precision push-pull action, the positioning push rod effectively avoids misalignment or gaps during track connection, ensuring the loading unit 2 smoothly enters and exits the high-temperature, high-pressure digestion unit 4. Furthermore, the positioning push rod possesses high rigidity and load-bearing capacity, maintaining stable performance even during frequent operation. The multi-stage push-pull cylinder provides significant push-pull force within a small space, making it suitable for pushing or pulling the loading unit 2 into and out of the high-temperature, high-pressure digestion unit 4.

[0083] Preferably, the industrial production system for steel slag sand of the present invention further includes a third track 7 and a fourth track 8. Specifically, the third track 7 is parallel to the fourth track 8, the third track 7 is perpendicular to the first track 6, and the third track 7 is parallel to the second track inside the high-temperature and high-pressure digestion unit 4. The third track 7 is used to allow the loading unit 2 to enter the high-temperature and high-pressure digestion unit 4, and the fourth track 8 facilitates the unloading of the loading unit 2 exiting the high-temperature and high-pressure digestion unit 4.

[0084] The loading unit 2 specifically includes multiple track trolleys 15, which can move along the third track 7 and / or the fourth track 8. Specifically, the feeding unit 1 is used to feed the track trolleys 15 located on the third track 7. After the steel slag loaded in the track trolley 2 undergoes high-temperature and high-pressure slag melting treatment, the track trolley 15 moves to the fourth track 8 via the transfer unit 3, and then moves to the other end of the fourth track 8 for unloading. After unloading, the empty track trolley 15 returns to the third track 7 via the transfer unit 3.

[0085] This invention establishes a third track (7) and a fourth track (8), and through the cooperation of the third track 7, the fourth track 8, and the transfer unit, constructs a cyclical operating path for the railcar in the steel slag sand production system, realizing the continuous and automated production process of steel slag sand. After loading, the railcar in the loading unit runs along the third track, and after passing through the transfer unit, it is introduced into the high-temperature and high-pressure digestion unit for high-temperature and high-pressure digestion treatment of the steel slag. After the high-temperature and high-pressure digestion treatment is completed, the railcar is transferred through the transfer unit at the other end to the fourth track for unloading, and then returns to the third track through the transfer unit again, realizing the cyclical use of the railcar. The above design not only improves the continuity of system operation, but also ensures the efficient scheduling and utilization of the railcar in the system, providing a stable and reliable operating foundation for the large-scale continuous production of steel slag sand.

[0086] This invention utilizes a cyclical loading unit mechanism to tightly connect the processes of feeding, transportation, high-temperature and high-pressure treatment, and unloading, forming a complete closed-loop process. After unloading, the loading unit can automatically return to the loading unit, reload, and enter the next round of processing, avoiding the waiting time caused by manual loading and unloading and equipment idling in traditional production, thus significantly improving production efficiency.

[0087] Furthermore, the flexible connection mechanism of the shuttle trolley and transition track enables the loading unit to be efficiently transferred between different tracks without manual intervention, realizing fully automated and continuous operation, and providing a solid technical foundation for the large-scale industrial production of steel slag sand.

[0088] Preferably, the track trolley 15 of the present invention includes a hopper 151. The hopper 151 has multiple tubes 152 with openings at both ends inside. The tubes 152 penetrate the hopper body, and their ends connect to the hopper 151. The outer walls of the tubes 152 and the side walls of the hopper 151 together form the internal outline of the hopper 151. The inner walls of the different tubes 152 are not interconnected. The upper end of the hopper 151 is open for loading steel slag. The extension direction of the tubes is perpendicular to the travel direction of the track trolley.

[0089] More preferably, to allow for a larger capacity of the hopper 151 of the track trolley 15 to hold steel slag and facilitate the smooth entry of steel slag into the hopper 151, the multiple pipes 152 are parallel to each other, and the lines connecting the axes of the multiple pipes 152 located in the same vertical column are straight, meaning that the multiple pipes 152 located in the same vertical column are on the same vertical plane. More preferably, the distance between adjacent pipes 152 is ≤50cm, preferably 30-50cm, and the diameter of the pipe 152 is ≤15dm, preferably 10-15dm.

[0090] This invention incorporates multiple tubes integrated into the silo body within the track trolley, increasing the surface area for heat and pressure application of the steel slag loaded inside. This allows for uniform pressure and heat application under high temperature and pressure, improving the slag's digestion efficiency and processing quality. The open ends of the tubes further enhance the surface area for the high-temperature, high-pressure steam, achieving thorough penetration and uniform pressurization heating of the steel slag. Additionally, the tubes further strengthen the overall structural integrity of the silo, providing a structural foundation for the high-quality, high-efficiency production of steel slag sand.

[0091] This invention controls the spacing between adjacent pipes to within 50cm, ensuring that high-temperature, high-pressure steam can evenly penetrate all areas inside the silo, avoiding thermal dead zones. If the spacing exceeds 50cm, the pipes are too sparsely distributed, resulting in uneven steam flow, which will lead to uneven heating of the steel slag and insufficient local pressure, thus affecting the slag digestion efficiency and product quality. If the spacing between adjacent pipes is less than 50cm, it will reduce the effective loading space, decrease the amount of steel slag processed per unit time, and thus affect the overall processing efficiency. This invention controls the diameter of the pipe 152 to within 15dm, ensuring that the pipe itself achieves an optimal balance between structural strength and thermal conductivity. An excessively large diameter will occupy the internal space of the silo, reducing the amount of steel slag loaded, while an excessively small pipe diameter will restrict steam flow, leading to uneven pressurization and heating, and a decrease in processing efficiency.

[0092] Preferably, the feeding unit 1 includes a feeding belt conveyor 16 and a loading hopper 17 connected to the feeding belt conveyor 16. The loading hopper 17 is located above the track trolley 15 and above the third track 7. The feeding belt conveyor is used to transport steel slag to the loading hopper 17, and the loading hopper 17 is used to load the steel slag into the track trolley 15. In addition to loading steel slag, the loading hopper 17 can also be used to load water into the track trolley 15; specifically, water can be loaded first, followed by steel slag.

[0093] This invention achieves automatic conveying and precise loading of steel slag by setting up a feeding belt conveyor and a loading hopper, thereby improving feeding efficiency and system automation. The loading hopper is positioned directly above the track trolley, facilitating the rapid falling of steel slag into the hopper. It also features a water-adding function, which promotes uniform moisture distribution and thorough reaction during the subsequent high-temperature, high-pressure digestion process, thus improving the quality of the steel slag sand product. This structural design is reasonable and easy to operate, providing a stable feeding guarantee for the continuous and large-scale production of steel slag sand.

[0094] More preferably, the industrial production system for steel slag sand of the present invention further includes an unloading unit 5, which includes a tilting unloading machine 51 and a finished product belt conveyor 52, for taking out steel slag sand from the loading unit 2 and transporting it. The tilting unloading machine 51 is located on the fourth track 8. The tilting unloading machine 51 is used to drive the track trolley 15 located on the fourth track 8 to tilt after the high temperature and high pressure digestion treatment is completed, so that the steel slag sand falls onto the finished product belt conveyor 52.

[0095] The unloading unit of this invention employs a combination of a tilting unloader and a finished product belt conveyor to achieve efficient and automated unloading of steel slag sand. After undergoing high-temperature and high-pressure treatment, the track trolley enters the unloading area, where the tilting unloader rotates it at a certain angle, such as 180°, allowing the steel slag sand to be quickly and thoroughly unloaded into the finished product belt conveyor, completing subsequent conveying operations. The unloading unit of this invention features a simple structure and reliable operation, avoiding manual intervention, improving system operating efficiency and unloading cleanliness, and providing an efficient solution for the continuous production and finished product conveying of steel slag sand.

[0096] Preferably, the high-temperature and high-pressure digestion unit 4 of the present invention includes multiple parallel autoclaves 18. The autoclave is the core equipment in the high-temperature and high-pressure digestion process of steel slag, used to pressurize and heat the railcar loaded with steel slag and water to achieve efficient digestion and stabilization of the steel slag. Multiple autoclaves can improve the system's processing capacity and production capacity, meeting the needs of large-scale industrial production of steel slag sand.

[0097] Autoclaves are relatively large, and in existing technologies, the opening and closing of the autoclave door is mostly achieved by manually installing and removing screws on the autoclave door and the autoclave body. This is time-consuming, labor-intensive, and inconvenient. To solve this problem, in a further preferred embodiment, the autoclave 18 includes an autoclave body 181, a second track disposed inside the autoclave body 181, an autoclave door 182, and a crank arm 183. The autoclave door 182 includes an inner door and an outer door. The inner door can be hinged to the autoclave body 181 by means of a pin or other structure, and the outer door is rotatably connected to the inner door and can rotate relative to the inner door.

[0098] Both ends of the crank arm 183 are hinged to the outer door of the autoclave body 181. Specifically, a pin can be inserted through the center of the outer door, and the other end of the pin can be sleeved on the crank arm 183, so that the outer door can rotate relative to the inner door, the autoclave body 181, and the crank arm. The outer door and the crank arm constitute the structural basis for a rotatable opening mechanism.

[0099] The autoclave body 181 and the outer door have grooves and teeth 19, respectively. The grooves and teeth are the same in shape and size. However, it should be noted that the grooves and teeth on the autoclave body 181 and the outer door do not mesh with each other; there is only line contact or surface contact between them. When it is necessary to lock the autoclave door to the autoclave body, the teeth are rotated until they make line contact with the grooves. In addition, a sealing structure can be further provided on the autoclave body. The autoclave body 181 is provided with a door opening and closing structure 20, and the outer door is provided with a connecting plate 21. In order to reduce manual labor and realize the automatic opening and closing and locking of the autoclave door, the door opening and closing structure 20 of the present invention specifically includes a motor 201, a lead screw 202, a nut 203, and a moving pin 204. The motor 201 is mounted on the outer wall of the autoclave body 181. The lead screw 202 is connected to the output shaft of the motor 201 and is used to drive the lead screw 202 to rotate. The nut 203 is sleeved on the lead screw 202 and is used to convert the rotational motion of the lead screw 202 into linear motion. The movable pin 204 is fixedly connected to the nut 203. A connecting hole is opened on the connecting plate 21. The area of ​​the connecting hole is larger than the cross-sectional area of ​​the movable pin 204. The movable pin 204 can pass through the connecting hole and gradually press against the connecting plate 21 through the transmission of the lead screw 202, and further drive the connecting plate 21 and the outer door to rotate. When the movable pin pushes the connecting plate to rotate until the slot on the autoclave body 181 and the tooth 19 on the outer door are in line contact, the autoclave door is locked. When it is necessary to open the autoclave door, the motor is started in reverse. The movable pin 204 drives the autoclave door 182 to rotate in reverse until the autoclave body 181 and the tooth 19 on the outer door are in surface contact. Additionally, it should be noted that due to the considerable weight of the autoclave door and outer door, the outer door will not rotate relative to the inner door without the action of the door opening and closing mechanism.

[0100] Traditional autoclave doors rely heavily on manual tightening or loosening of numerous bolts for opening and closing, which is cumbersome, labor-intensive, and inefficient. This invention utilizes a motor-screw-nut mechanism to drive a moving pin and push a connecting plate, achieving automatic rotation and locking of the autoclave door. This replaces traditional manual operation, saving labor costs and significantly improving operational efficiency and system automation.

[0101] Autoclaves operate under high temperature and pressure, making the locking strength of the door crucial. This invention utilizes a locking mechanism with interlocking teeth to secure the door to the main body. This stable structure and reliable locking effectively prevent accidental door opening due to pressure buildup, significantly improving the safety and stability of the equipment.

[0102] On the other hand, the present invention also provides an industrial production method for steel slag sand, comprising the following steps:

[0103] S1: The feeding unit 1 loads the steel slag into the loading unit 2. The loading unit 2 moves to the end of the third track 7 facing the autoclave door 182, preparing to enter the high temperature and high pressure digestion unit, i.e., the autoclave, through the transfer unit.

[0104] S2: Driven by the traveling transmission structure, the shuttle trolley 9 moves along the first track 6 to the transition track 13 and connects with the third track 7. Then, the loading unit 2, i.e., the track trolley 15, moves from the third track 7 onto the transition track 13. It should be noted that the shuttle trolley 9 moving along the first track 6 to the transition track 13 and connecting with the third track 7 can occur at any time before, during, or after the loading unit 2 moves to the end of the third track facing the autoclave door 182; there is no strict sequential requirement. S3: The autoclave door 182 is opened, and the shuttle trolley 9, carrying the loading unit 2, moves along the first track 6 together, making the transition track 13 and the second track aligned. Then, the first push-pull structure pushes out the telescopic structure 12, connecting the transition track 13 with the second track. Then, the second push-pull structure 14 pushes the loading unit 2 onto the second track, and the loading unit enters the high-temperature and high-pressure digestion unit.

[0105] S4: The second push-pull structure 14 retracts to its original position, the first push-pull structure pulls the telescopic structure 12 back to its original position, so that the transition track 13 is separated from the second track, and then the autoclave door 182 is closed.

[0106] S5: The steel slag is subjected to high-temperature and high-pressure digestion treatment through the high-temperature and high-pressure digestion unit 4, and then cooled after the treatment is completed.

[0107] S6: Open the autoclave door 182 again. The first push-pull structure pushes out the telescopic structure 12, so that the transition track 13 connects with the second track. The second push-pull structure 14 extends again and contacts the loading unit 2. Then the second push-pull structure 14 retracts, driving the loading unit 2 to move onto the transition track 13. After that, the first push-pull structure 11 pulls the telescopic structure 12 back to its original position, so that the transition track 13 separates from the second track. Then the shuttle trolley 9 carries the loading unit 2 along the first track 6 until the transition track 13 connects with the fourth track 8. After that, the second push-pull structure pushes the loading unit 2 into the fourth track 8.

[0108] S7: Loading unit 2 moves to the other end of the fourth track 8 and unloads through the unloading unit. After unloading, loading unit 2 returns to the third track 7 via the shuttle trolley 9 located at the other end of the high temperature and high pressure digestion unit 4.

[0109] Specifically, in step S7, after unloading, the shuttle trolley 9, located at the other end of the high-temperature and high-pressure digestion unit 4, moves along the first track 6 to the transition track 13 and connects with the fourth track 8. The second push-pull structure extends and contacts the loading unit 2. Then, the second push-pull structure 14 retracts, driving the loading unit 2 from the fourth track 8 to the transition track 13. Then, the shuttle trolley 9 carries the loading unit 2 along the first track 6 until the transition track 13 connects with the third track 7. After that, the second push-pull structure pushes the loading unit 2 into the third track 7, so that the empty loading unit 2 returns to the feeding unit for feeding. The above steps S1-S7 are repeated to realize the cyclic use of the loading unit 2.

[0110] The track trolley 15 itself may not have a drive structure. The power for the track trolley 15 to move along the third track 7 and / or the fourth track 8 can be provided by a battery-powered trolley with its own drive device. The battery-powered trolley is detachably connected to the track trolley and is used to drive the track trolley to move along the third track, to move the track trolley from the third track to the shuttle track, and to move the track trolley along the fourth track. In addition, in step S6 above, besides using the second push-pull structure, the track trolley can also be brought from the shuttle track to the fourth track by the battery-powered trolley.

[0111] In addition, the autoclave of the present invention can accommodate multiple track trolleys at one time. In order to facilitate the entry and exit of the track trolleys from the autoclave, the present invention also provides a quick-release connection assembly on the track trolley 15 and the second push-pull structure 14. The quick-release connection assembly includes a fixed connector 22 and a movable connector 23 that are simultaneously provided at the front and rear ends of the track trolley.

[0112] The movable connector 23 is a rotatable coupler, specifically comprising a fixed part fixedly mounted on the track trolley and a movable part rotatably connected to the fixed part via a pin. The movable part can rotate relative to the fixed part via the pin. Additionally, a manual operating structure (not shown in the attached diagram) for controlling the movable part can be provided on the track trolley. The manual operating structure may include a fixed base, an operating lever, and a chain. The fixed base is mounted on the track trolley and its height is greater than that of the movable part. The operating lever is hinged to the fixed base via a pin. One end of the chain is connected to the operating lever, and the other end is connected to the movable part. The shapes of the fixed connector 22 and the movable connector 23 are matched.

[0113] Before pushing the track trolley into the autoclave, the movable part can be rotated to open by manually controlling the operating lever. Then, the next track trolley moves forward, and the fixed connecting piece 22 on it moves to engage with the fixed part. Then, the operating lever is released, and the movable part automatically closes under gravity, locking the movable connecting piece 23 with the fixed connecting piece 22. In this way, each track trolley in the same autoclave can be connected in sequence, facilitating its removal from the autoclave. After the complete high-temperature and high-pressure digestion process, the track trolleys in the autoclave can be moved outward simultaneously by the transfer unit. Once all the outermost track trolleys have moved to the transfer track, the movable connecting piece 23 can be separated from the fixed connecting piece 22 by manually controlling the operating lever, thus removing all track trolleys.

[0114] Furthermore, the second push structure is also equipped with either a fixed connector 22 or a movable connector 23 to enable the track trolley to enter or exit the autoclave.

[0115] To further clarify the present invention and its technological advancements, the following description is provided in conjunction with specific embodiments and technical effects.

[0116] In addition, such as Figure 15 As shown, this invention also integrates the steel slag sand production system with an automated control system, achieving comprehensive integration and optimization from centralized monitoring and scheduling in the main control room to automatic control of each unit. By incorporating the feeding unit, transfer unit, automatic opening and closing control of the autoclave door, and unloading by the tilting unloader into the automated control system, the main control room can also control the temperature, pressure, and running time inside the autoclave, achieving seamless connection and automated operation of the entire production process, reducing manual intervention and improving production efficiency.

[0117] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention 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 or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An industrialized production system for steel slag sand, characterized in that, It includes a feeding unit (1), a loading unit (2), a transfer unit (3), a high-temperature and high-pressure digestion unit (4), and a third track (7) and a fourth track (8) that are parallel to each other; The loading unit (1) is used to load steel slag into the loading unit (2), the ferry unit (3) is used to move the loading unit (2) into and out of the high temperature and high pressure digestion unit (4) and bring the unloaded loading unit (2) back to the third track (7), and the high temperature and high pressure digestion unit (4) is used to perform high temperature and high pressure digestion treatment on the steel slag. The ferry unit (3) includes a first track (6) and a fifth track located at both ends of the high temperature and high pressure digestion unit (4), and a ferry trolley (9) that can move along the first track (6) and the fifth track respectively; the first track (6) and the fifth track are perpendicular to the movement direction of the loading unit (2); The shuttle trolley (9) is equipped with a shuttle track (13), which can be connected or separated from the second track inside the high temperature and high pressure digestion unit (4) by moving; the shuttle trolley (9) can also enter and exit the high temperature and high pressure digestion unit (4) by pushing and pulling the loading unit (2); The third track (7) is perpendicular to the first track (6) and the fifth track, and the third track (7) is parallel to the second track inside the high temperature and high pressure digestion unit (4).

2. The industrial production system for steel slag sand according to claim 1, characterized in that, The shuttle trolley (9) also includes a main body (10), a first push-pull structure (11), a telescopic structure (12), and a second push-pull structure (14); the first push-pull structure (11) is set on the main body (10), and the transition track (13) and the second push-pull structure (14) are both set on the telescopic structure (12); The first push-pull structure (11) uses the push-pull telescopic structure (12) to connect or separate the transition track (13) from the second track inside the high-temperature and high-pressure digestion unit (4); the second push-pull structure (14) uses the push-pull loading unit (2) to allow it to enter and exit the high-temperature and high-pressure digestion unit (4).

3. The industrial production system for steel slag sand according to claim 2, characterized in that, The first push-pull structure (11) is a positioning push rod, and the second push-pull structure (14) is a multi-stage push-pull cylinder; The main body (10) includes a frame (101), a travel transmission structure (102), and a track wheel (103); the travel transmission structure (102) and the track wheel (103) are mounted on the frame (101), and the travel transmission structure (102) and the track wheel (103) are drivenly connected.

4. The industrial production system for steel slag sand according to claim 1, characterized in that, The loading unit (2) includes multiple track trolleys (15), which are capable of moving along a third track (7) and / or a fourth track (8); the track trolley (15) moves from the third track (7) to the shuttle track (13), then follows the shuttle trolley (9) along the first track (6), and then leaves the shuttle track (13) and enters the fourth track (8); The feeding unit (1) feeds the rail trolley (15) located on the third track (7). After the steel slag is treated by high temperature and high pressure, the rail trolley (15) loaded with steel slag sand moves to the fourth track (8) through the transfer unit (3), and then moves to the other end of the fourth track (8) for unloading. After unloading, the empty rail trolley (15) returns to the third track (7) through the transfer unit (3).

5. The industrial production system for steel slag sand according to claim 3, characterized in that, The track trolley (15) includes a hopper (151), and the hopper (151) is provided with multiple tubes (152) with openings at both ends. The tubes (152) penetrate the hopper (151) and the two ends of the tubes (152) are connected to the hopper (151). The hopper (151) has an opening at the top for loading steel slag. Multiple tubes (152) are parallel to each other, and multiple tubes (152) located in the same column in the vertical direction are on the same vertical plane; The distance between adjacent tubes (152) is ≤50cm, and the diameter of tube (152) is ≤15dm.

6. The industrial production system for steel slag sand according to claim 3, characterized in that, The feeding unit (1) includes a feeding belt conveyor (16) and a material hopper (17) connected to the feeding belt conveyor (16); The loading hopper (17) is located above the track trolley (15) and above the third track (7). The loading belt conveyor (16) is used to transport steel slag to the loading hopper (17). The loading hopper (17) is used to load steel slag into the track trolley (15). The loading hopper (17) is also used to load water into the track trolley (15).

7. The industrial production system for steel slag sand according to claim 3, characterized in that, It also includes a discharge unit (5), which includes a tilting unloader (51) and a finished product belt conveyor (52). The tilting unloader (51) is located on the fourth track (8). The tipping unloader (51) is used to drive the track trolley (15) located on the fourth track (8) to tip after the high temperature and high pressure digestion treatment is completed, so that the steel slag sand falls onto the finished product belt conveyor (52).

8. The industrial production system for steel slag sand according to claim 1, characterized in that, The high-temperature and high-pressure digestion unit (4) includes multiple autoclaves (18) arranged in parallel; The autoclave (18) includes an autoclave body (181), a second track disposed inside the autoclave body (181), an autoclave door (182), and a crank arm (183); The autoclave door (182) includes an inner door and an outer door. The inner door is hinged to the autoclave body (181), and the outer door is rotatably connected to the inner door. The two ends of the crank arm (183) are respectively hinged to the autoclave body (181) and the outer door, and the outer door can rotate relative to the crank arm (183); The autoclave body (181) and the outer door are respectively provided with a slot and a tooth (19). The autoclave body (181) is provided with a door opening and closing structure (20), and the outer door is provided with a connecting plate (21).

9. A method for industrializing steel slag sand using the steel slag sand industrialization production system according to any one of claims 1-8, characterized in that, Includes the following steps: S1: The feeding unit loads the steel slag into the loading unit, and the loading unit moves along the third track to the end facing the autoclave door; S2: The shuttle trolley moves along the first track to the transition track and connects with the third track. Then the loading unit moves from the third track to the transition track. S3: Open the autoclave door, the shuttle trolley carrying the loading unit moves along the first track, so that the transition track and the second track are on the same straight line. Then the first push-pull structure pushes out the telescopic structure, so that the transition track and the second track are connected. Then the second push-pull structure pushes the loading unit into the second track. S4: The second push-pull structure retracts to its original position, the first push-pull structure pulls the telescopic structure back to its original position, separating the transition track from the second track, and then the autoclave door is closed; S5: The steel slag is subjected to high-temperature and high-pressure digestion treatment through a high-temperature and high-pressure digestion unit, and then cooled after the treatment is completed; S6: Open the autoclave door again. The first push-pull structure pushes out the telescopic structure, connecting the transition track with the second track. The second push-pull structure extends again and contacts the loading unit. Then, the second push-pull structure retracts, moving the loading unit onto the transition track. After that, the first push-pull structure pulls the telescopic structure back to its original position, separating the transition track from the second track. Then, the shuttle trolley carries the loading unit along the first track until the transition track connects with the fourth track. After that, the second push-pull structure pushes the loading unit into the fourth track. S7: The loading unit moves to the other end of the fourth track for unloading. After unloading, the loading unit returns to the third track via a shuttle trolley located at the other end of the high-temperature and high-pressure digestion unit.

10. The industrial production method of steel slag sand according to claim 9, characterized in that, In step S7, after unloading, the shuttle trolley located at the other end of the high-temperature and high-pressure digestion unit moves along the first track to the transition track and connects with the fourth track. The second push-pull structure extends and contacts the loading unit. Then the second push-pull structure retracts, driving the loading unit to move from the fourth track to the transition track. Then the shuttle trolley carries the loading unit along the first track until the transition track connects with the third track. After that, the second push-pull structure pushes the loading unit into the third track.

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