Steel slag hot disintegration cover based on pressure regulation

Abstract

This application provides a pressure-regulated hot slag quenching cover, relating to the field of metallurgical technology. The hot slag quenching cover includes a cover body, an exhaust port, a safety valve, a water pipeline system, a water flow control valve, and an inlet pipe. The cover body is positioned above the hot slag quenching pit, with an exhaust port at the top for discharging the generated high-temperature, high-pressure steam. The safety valve is installed at the exhaust port and opens when the pressure inside the quenching pit exceeds a preset value, opening and closing in response to pressure changes. The water pipeline system is fixed to the bottom of the cover body and includes a first water line branch and a second water line branch. The water flow control valve is located at the front end of the second water line branch and opens when pulled by a control line and closes when not pulled. The inlet pipe is located on the outside of the cover body and connected to the water pipeline system. This application enables relatively precise water flow control under dynamic pressure changes within the quenching pit, resulting in good quenching performance.

Description

Technical Field

[0001] This application relates to the field of metallurgical technology, and in particular to a steel slag hot sump cover based on pressure regulation. Background Technology

[0002] Steel slag is a byproduct of the steelmaking process in the iron and steel industry, characterized by high temperature, high hardness, and certain chemical reactivity. The resource utilization of steel slag is an important component of the circular economy and energy conservation and emission reduction in the iron and steel industry. Currently, steel slag treatment methods mainly include cooling, slag-iron separation, and tailings stabilization. Among these, the efficiency and quality of the cooling process directly affect the subsequent treatment effect and economic value of the steel slag. As a mature cooling method, hot quenching is widely used in the field of steel slag treatment due to its simple process, high safety, and good separation effect.

[0003] In the application of the hot quenching method, the hot quenching cover is a key piece of equipment. Existing hot quenching covers typically rely on manual control of the cooling water volume, with adjustments made at different stages depending on the operator's experience and judgment. These hot quenching covers usually have vents and safety valves above the quenching pit to release high-temperature steam and prevent safety hazards caused by excessive pressure. However, due to the insufficient precision of manual water control, existing hot quenching covers often struggle to adjust the water volume according to real-time pressure changes during the quenching process. This can easily lead to insufficient water volume in the initial stage, resulting in low cooling efficiency, or excessive water volume in the middle stage, causing steam overflow, thus affecting cooling performance and resource utilization. Utility Model Content

[0004] This application provides a pressure-regulated hot slag cover to solve the problem that existing hot slag covers cannot adjust the water volume according to the dynamic changes in pressure inside the hot slag pit.

[0005] In the first aspect, this application provides a steel slag hot sump cover based on pressure regulation, including a hot sump cover body, an exhaust port, a safety valve, a water line pipeline system, a water flow control valve, and a water inlet pipe;

[0006] The hot slag cover body is set above the hot slag pit and is used to cover the hot slag pit to form a closed space.

[0007] The exhaust port is located at the top of the hot sump cover body and is used to discharge the high-temperature and high-pressure steam generated in the hot sump pit.

[0008] The safety valve is installed at the exhaust port and can be opened when the pressure in the hot sump exceeds a preset value and can open and close in accordance with the pressure change in the hot sump.

[0009] The water line pipeline system is fixedly installed at the bottom end of the heat seal cover body, including a first water line branch and a second water line branch. The first water line branch is used for small water volume spraying, and the second water line branch is used for medium-term large water volume intermittent spraying under the control of the water volume control valve.

[0010] The water flow control valve is located at the front end of the second water line branch. The water flow control valve can be opened when pulled by the valve control line and can be reset and closed when not pulled. One end of the valve control line is connected to the water flow control valve, and the other end of the valve control line is connected to the safety valve. The safety valve's opening and closing actions are transmitted to the water flow control valve to achieve linkage control.

[0011] The water inlet pipe is located on the outside of the heat seal cover and connected to the water line pipeline system, and is used to supply water to the first water line branch and the second water line branch.

[0012] In one optional embodiment, the water flow control valve is a pull valve, the valve stem of the water flow control valve is connected to the pull valve control line, and the water flow control valve is reset to the closed state by a built-in spring.

[0013] In one optional embodiment, one end of the water inlet pipe is located outside the heat seal cover body and connected to a water source, and the other end of the water inlet pipe extends into the heat seal cover body and is connected to the first water line branch and the second water line branch. The water inlet end of the first water line branch is connected to the pipe body of the water outlet end of the water inlet pipe, and the water inlet end of the second water line branch is connected to the end of the water outlet end of the water inlet pipe. The water flow control valve is provided on the second water line branch near the connection point with the water inlet pipe, and the vent is provided at the position corresponding to the heat seal cover body above the water flow control valve.

[0014] In one optional embodiment, the first water line branch is located at the bottom end of the heat seal cover body and is arranged linearly in the center. Multiple first nozzles are evenly arranged on the pipe of the first water line branch. The second water line branch is a symmetrical structure relative to the first water line branch and is arranged in the bottom area of ​​the heat seal cover body. The second water line branch includes an annular pipe, branch pipes and nozzle branch pipes. One end of the annular pipe is connected to the outlet end of the inlet pipe. The water flow control valve is located on the annular pipe and close to the inlet end of the annular pipe. The nozzle branch pipes are arranged vertically downward on a set of opposite pipes of the annular pipe, and multiple branch pipes are also arranged vertically outward on the set of opposite pipes of the annular pipe. The branch pipes are on the same horizontal plane as the annular pipe. Each branch pipe is also arranged vertically downward on a nozzle branch pipe. A second nozzle for spraying water is installed at the bottom end of each nozzle branch pipe.

[0015] In one optional embodiment, the safety valve is a cover valve installed at the exhaust port. The cover valve includes a cover plate that is hinged to one side of the exhaust port and can rotate outward. A counterweight is provided on the outer side of the cover plate to adjust the opening pressure required when the cover plate is opened.

[0016] In one optional embodiment, a weight bracket is provided on the outer side of the cover plate, and the counterweight is sleeved on the weight bracket.

[0017] In one optional embodiment, both the first nozzle and the second nozzle are spiral nozzles, the second nozzle having a larger specification than the first nozzle, the first nozzle being threadedly connected to the pipe of the first water line branch, and the second nozzle being threadedly connected to the bottom end of the nozzle branch pipe.

[0018] In one alternative implementation, the first nozzle is 1.5 inches in diameter and the second nozzle is 2 inches in diameter.

[0019] Compared with the prior art, this application has the following beneficial effects:

[0020] 1. This application optimizes the structural design of the hot slag quenching cover, enabling more precise water volume control under dynamic pressure changes within the quenching pit, thereby improving the quenching effect. This application utilizes a dual-waterline branch system (first and second waterline branches) at the bottom of the quenching cover body. This allows for appropriate water volume control at different stages of the slag cooling process within the quenching pit. The first waterline branch is used for initial small-volume spraying, while the second waterline branch, under the adjustment of the water volume control valve, provides intermittent large-volume spraying in the middle stage. This method ensures that the water supply during quenching matches the temperature and pressure changes of the slag, thus improving the quenching effect. Furthermore, by adjusting the water volume, it avoids the uneven cooling and low efficiency problems caused by excessive or insufficient water volume in traditional quenching covers.

[0021] 2. This application employs a linkage control mechanism between a safety valve and a water flow control valve. The safety valve automatically opens based on pressure changes within the hot sump, thereby controlling the opening and closing of the water flow control valve via a pull valve control line to regulate the water flow in the second water line branch. This linkage control method avoids the complete reliance on manual judgment and operation found in traditional hot sump covers, reducing the impact of human factors on water flow regulation. The water flow control valve, linked to the safety valve via a pull valve control line, automatically adjusts the amount and frequency of water spraying, effectively reducing the workload of operators while improving the accuracy and consistency of water flow regulation. Simultaneously, the safety valve automatically opens when the pressure within the hot sump exceeds a preset value, releasing high-temperature, high-pressure steam, effectively preventing equipment damage or safety hazards caused by excessive pressure within the hot sump. This design, through its linkage with the water flow control valve, enables effective venting and water flow regulation when pressure is high, avoiding the problems of traditional hot sump covers failing to automatically vent or adjust water flow in a timely manner due to excessive pressure, thus improving the system's safety and stability.

[0022] 3. The water pipeline system of this application can automatically adjust the water flow rate according to the real-time pressure changes in the heat treatment pit under the linkage control of the safety valve and the water flow control valve. This dynamic water flow adjustment method can avoid excessive water waste. Compared with the traditional manual water flow control method, this automatic adjustment not only reduces water waste, but also avoids unsatisfactory heat treatment effect due to insufficient water flow, ultimately maximizing resource utilization efficiency. This water flow control method can reduce energy consumption, improve treatment effect, and thus bring about economic benefits. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of a pressure-regulated hot slag septic cap provided in an embodiment of this application;

[0025] Figure 2 This is a schematic diagram of the overall body of the heat seal cover provided in an embodiment of this application;

[0026] Figure 3 This is a schematic diagram of the structure of a waterline pipeline system provided in an embodiment of this application.

[0027] In the diagram: 100 - Heat seal cover body; 200 - Exhaust port; 300 - Safety valve; 310 - Cover plate; 320 - Counterweight; 330 - Weight bracket; 400 - Water line pipeline system; 410 - First water line branch; 411 - First nozzle; 420 - Second water line branch; 421 - Ring pipeline; 422 - Branch pipe; 423 - Nozzle branch pipe; 4231 - Second nozzle; 500 - Water flow control valve; 600 - Valve control line; 700 - Water inlet pipe. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application are described clearly and completely below. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are also within the scope of protection of this application.

[0029] Please see Figures 1-3 The pressure-regulated hot slag cover provided in this application includes a hot slag cover body 100, an exhaust port 200, a safety valve 300, a water line pipeline system 400, a water flow control valve 500, and a water inlet pipe 700.

[0030] The hot slag cover body 100 is set above the hot slag pit to cover the hot slag pit and form a closed space.

[0031] The exhaust port 200 is located on the top of the hot sump cover body 100 and is used to discharge the high-temperature and high-pressure steam generated in the hot sump pit.

[0032] Safety valve 300, installed at exhaust port 200, can open when the pressure in the hot sump exceeds a preset value and can open and close in accordance with the pressure change in the hot sump.

[0033] The water line pipeline system 400 is fixedly installed at the bottom end of the heat seal cover body 100, including a first water line branch 410 and a second water line branch 420. The first water line branch 410 is used for small water volume spraying, and the second water line branch 420 is used for medium-term large water volume intermittent spraying under the control of the water volume control valve 500.

[0034] A water flow control valve 500 is located at the front end of the second water line branch 420. The water flow control valve 500 can be opened when pulled by the valve control line 600 and can be reset and closed when not pulled. One end of the valve control line 600 is connected to the water flow control valve 500, and the other end of the valve control line 600 is connected to the safety valve 300. It is used to transmit the opening and closing actions of the safety valve 300 to the water flow control valve 500 to achieve linkage control.

[0035] The water inlet pipe 700 is located on the outside of the heat seal cover body 100 and connected to the water line pipeline system 400, and is used to supply water to the first water line branch 410 and the second water line branch 420.

[0036] The pressure-regulated hot slag cover provided in this application embodiment, through optimized structural design, enables more precise water volume control under dynamic pressure changes within the hot slag pit, thereby improving the hot slag effect. In this embodiment, a dual-water-line branch system 400 (including a first water-line branch 410 and a second water-line branch 420) is installed at the bottom of the hot slag cover body 100. This allows for appropriate water volume control at different stages of the cooling process of the steel slag within the hot slag pit. The first water-line branch 410 is used for initial small-volume spraying, while the second water-line branch 420 can perform intermittent large-volume spraying in the middle stage under the regulation of the water volume control valve 500. This method ensures that the water supply during the hot slag process is well matched with the temperature and pressure changes of the steel slag, thus improving the hot slag effect. Furthermore, water volume regulation avoids the problems of uneven cooling and low efficiency caused by excessive or insufficient water volume in traditional hot slag covers.

[0037] In this embodiment, a linkage control mechanism between the safety valve 300 and the water flow control valve 500 is adopted. The safety valve 300 can automatically open according to the pressure change in the hot sump, thereby driving the opening and closing of the water flow control valve 500 through the pull valve control line 600 to regulate the water flow in the second water line branch 420. This linkage control method avoids the traditional hot sump method that relies entirely on manual judgment and operation, reducing the impact of human factors on water flow regulation. The water flow control valve 500 is linked with the safety valve 300 through the pull valve control line 600, automatically adjusting the amount and frequency of water spraying, effectively reducing the labor intensity of operators, while improving the accuracy and consistency of water flow regulation.

[0038] The safety valve 300 is designed to automatically open when the pressure inside the hot sump exceeds a preset value, releasing high-temperature, high-pressure steam. This effectively prevents equipment damage or safety hazards caused by excessive pressure inside the hot sump. This design, in conjunction with the water flow control valve 500, ensures effective venting and water flow regulation when pressure is high. This avoids the problems of traditional hot sump covers failing to automatically vent or adjust water flow in a timely manner due to excessive pressure, thus improving the system's safety and stability.

[0039] The water pipeline system 400 of this embodiment can automatically adjust the water flow rate according to the real-time pressure changes in the hot sump under the coordinated control of the safety valve 300 and the water flow control valve 500. This dynamic water flow adjustment method can avoid excessive water waste. Compared with the traditional manual water flow control method, this automated adjustment not only reduces water waste, but also avoids unsatisfactory hot sump effects due to insufficient water flow, ultimately maximizing resource utilization efficiency. This water flow control method can reduce energy consumption, improve treatment effect, and thus bring about improved economic benefits.

[0040] In some embodiments, the water flow control valve 500 is a pull valve, the valve stem of the water flow control valve 500 is connected to the pull valve control line 600, and the water flow control valve 500 is reset to the closed state by a built-in spring.

[0041] In the above embodiment, the water flow control valve 500 is a pull valve, with its valve stem connected to the pull valve control line 600. Through a built-in spring, the water flow control valve 500 can automatically reset to the closed state when not pulled by the pull valve control line 600. This reduces reliance on manual operation and achieves automatic reset control. When the safety valve 300 closes, the water flow control valve 500 can quickly return to its initial state, preventing excessive spraying of cooling water. This reset mechanism ensures water-saving effects and improved cooling accuracy during the cooling process, helping to reduce water waste and prevent overcooling. The water flow control valve 500 used can be any existing pull valve used for opening and closing pipelines.

[0042] In practical applications, when the valve control line 600 is pulled, the valve stem drives the valve core to move along the inner cavity of the valve body. This movement of the valve core changes the flow cross-sectional area within the valve, thus controlling the water flow. When the valve control line 600 is released, the built-in spring returns the valve stem and valve core to their initial positions, closing the water flow channel. This design, where the valve core opens and closes with the movement of the valve stem, allows for rapid adjustment of the cooling water flow, reducing reliance on manual operation.

[0043] The two ends of the pull valve control line 600 are connected to the water flow control valve 500 and the safety valve 300, respectively, achieving effective linkage between the two. Specifically, when the safety valve 300 opens, the pull valve control line 600 will pull the water flow control valve 500 to open, ensuring synchronization between the water flow control valve 500 and the safety valve 300. This linkage design closely links the spraying of cooling water with the pressure changes within the hot sump, enabling timely response to pressure changes within the system's hot sump and ensuring automatic adjustment of the cooling process.

[0044] The working principle of the pressure-regulated hot slag quenching cover in this application embodiment is as follows:

[0045] In the initial stage of hot quenching, after the hot quenching pit is filled with high-temperature steel slag, the hot quenching cover is closed. At this time, the temperature inside the hot quenching pit is extremely high. After the water valve of the inlet pipe 700 is opened, water flows through the inlet pipe 700 into the water line pipeline system 400 of the hot quenching cover. Due to the low pressure inside the hot quenching pit in the initial stage of hot quenching, the safety valve 300 is in a closed state and does not touch the water flow control valve 500. The water flow control valve 500 is also in a closed state, and no water flows through the second water line branch 420. Water is introduced into the first water line branch 410 to start pumping water in small quantities.

[0046] During the middle stage of the heat treatment process, as the water jet from the first water line branch 410 gradually comes into contact with the high-temperature steel slag, a large amount of water vapor is gradually generated, causing the pressure inside the heat treatment pit to gradually increase. When the pressure exceeds the design pressure, the high-temperature, high-pressure steam will open the safety valve 300. The opening of the safety valve 300 will pull the valve control line 600, at which point the water flow control valve 500 will open, and the second water line branch 420 will begin to flow water. After the second water line branch 420 has been spraying water and venting air for a period of time, the pressure inside the heat treatment pit will decrease, the safety valve 300 will automatically close, and the water flow control valve 500 will automatically reset and close, at which point the second water line branch 420 will stop spraying water. Since the safety valve 300 no longer releases air, the pressure inside the hot sump will increase again after a period of time, causing the safety valve 300 to open again. This allows the safety valve 300 to perform a reciprocating opening-closing-opening action under the action of high-pressure steam during the hot sump stage. Under this action, the water flow control valve 500 intermittently pumps water from the second water line branch 420. In addition, the degree of opening of the water flow control valve 500 is determined by the stroke of the safety valve 300. When the pressure inside the hot sump is high, the water flow control valve 500 opens more and pumps more water. When the pressure inside the hot sump is low, the water flow control valve 500 opens less and pumps less water. This achieves the function of automatic water flow control during the hot sump stage.

[0047] In the later stages of hot quenching, as the temperature of the steel slag inside the hot quenching pit continues to decrease, the amount of steam generated becomes less and less. The pressure inside the hot quenching pit is insufficient to open the safety valve 300, and the water flow control valve 500 automatically closes. Water cannot flow into the second water line branch 420, so only the first water line branch 410 provides a small flow of water for wetting. When the temperature of the steel slag drops sufficiently and no more significant steam is generated in the hot quenching pit, the water valve of the inlet pipe 700 is closed, and water spraying onto the steel slag stops, completing the cooling process.

[0048] In some embodiments, one end of the water inlet pipe 700 is located outside the heat seal cover body 100 and connected to a water source. The other end of the water inlet pipe 700 extends into the heat seal cover body 100 and connects to the first water line branch 410 and the second water line branch 420. This allows cooling water to be delivered to the two water line branches to meet targeted spraying needs. The inlet end of the first water line branch 410 is connected to the outlet end of the water inlet pipe 700, and the inlet end of the second water line branch 420 is connected to the outlet end of the water inlet pipe 700. A water flow control valve 500 is provided in the second water line branch 420 near the connection point with the water inlet pipe 700. The water flow control valve 500 is positioned here to allow for rapid response to changes in water flow demand, adjusting the amount of water entering the second water line branch 420 in a short time. An exhaust port 200 is located above the water flow control valve 500 at a position corresponding to the heat seal cover body 100. The first water line branch 410 and the second water line branch 420 are connected to different positions on the inlet pipe 700, allowing for a reasonable water flow distribution from the inlet pipe 700 through the first water line branch 410 and the second water line branch 420. Furthermore, by setting a water flow control valve 500, it is convenient to use the first water line branch 410 and the second water line branch 420 for water spray cooling at different cooling stages. In this embodiment, the inlet ends of the first water line branch 410 and the second water line branch 420 are respectively connected to the pipe body and the end of the outlet end of the inlet pipe 700. This connection method effectively avoids mutual interference between the two water line branches, allowing each branch to work independently. During the cooling process, the first water line branch 410 is used for initial small-volume water spraying, while the second water line branch 420 performs large-volume water spraying in the middle stage. This non-interfering layout allows the two cooling methods to fully exert their effects at different times.

[0049] In some embodiments, the first water line branch 410 is located at the bottom end of the heat seal cover body 100 and is arranged linearly in the center. The end of the first water line branch 410 away from the water inlet pipe 700 is a closed structure. Multiple first nozzles 411 are evenly arranged on the pipe of the first water line branch 410, thereby ensuring that the water in the first water line branch 410 can only be sprayed through the first nozzles 411. The second water line branch 420 is a symmetrical structure relative to the first water line branch 410 and is arranged in the bottom area of ​​the heat seal cover body 100. The second water line branch 420 includes an annular pipe 421, a branch pipe 422, and a nozzle branch pipe 423. One end of the annular pipe 421 is connected to the water outlet end of the water inlet pipe 700. A water flow control valve 500 is installed on the annular pipe 421 and near the inlet end of the annular pipe 421. A set of opposite pipes of the annular pipe 421 are vertically arranged downwards with nozzle branch pipes 423. The annular pipe 421 is also vertically arranged outwards with multiple branch pipes 422 on the set of opposite pipes. The branch pipes 422 are at the same horizontal plane as the annular pipe 421. Each branch pipe 422 is also vertically arranged downwards with a nozzle branch pipe 423. The free end of the branch pipe 422 is a closed structure, thereby ensuring that the water in the branch pipe 422 can only be sprayed through the nozzle branch pipe 423. A second nozzle 4231 for spraying water is installed at the bottom end of each nozzle branch pipe 423.

[0050] In the above embodiment, the first water line branch 410 is located at the bottom end of the hot sump cover body 100 and is arranged linearly in the center, with multiple first nozzles 411 evenly arranged on the pipeline. The second water line branch 420 is symmetrically arranged relative to the first water line branch 410 and is located in the bottom area of ​​the hot sump cover body 100. This layout allows the cooling water to effectively cover the slag area under the hot sump cover when a large amount of cooling water needs to be sprayed during the intermediate cooling stage, thereby achieving good uniformity during the cooling process.

[0051] In the second water line branch 420, the annular pipe 421, branch pipe 422, and nozzle branch pipe 423 form a multi-layered pipe layout. The annular pipe 421 creates a closed-loop water supply structure, making the cooling water supply more reliable. Even if one branch pipe 422 becomes blocked, the water flow can still be supplemented through other paths in the annular pipe 421. This combination of annular and branch designs improves the flexibility and reliability of the cooling water supply, ensuring that the water flow during the cooling process is not interrupted due to localized problems, thus maintaining a continuous and effective cooling effect.

[0052] Furthermore, the nozzle branch pipes 423 in the second water line branch 420 are arranged perpendicular to the annular pipe 421 and the branch pipe 422, and each nozzle branch pipe 423 has a second nozzle 4231 for spraying water installed at its bottom end. This vertical arrangement allows the cooling water to act directly on the surface of the steel slag, reducing the energy loss due to collision or diffusion during spraying. The vertically arranged nozzle branch pipes 423 allow the water flow to reach the area requiring cooling via the most direct path, improving the effective utilization rate of water. At the same time, this design also makes the spray direction of the cooling water clear and the cooling area precise, avoiding water waste and thus achieving more precise cooling control.

[0053] In some embodiments, the safety valve 300 is a cover valve installed at the exhaust port 200. The cover valve includes a cover plate 310 that is hinged to one side of the exhaust port 200 and can rotate outward. A counterweight 320 is provided on the outer side of the cover plate 310 to adjust the opening pressure required when the cover plate 310 is opened.

[0054] In the above embodiment, the safety valve 300 adopts the form of a cover valve, with the cover 310 hinged to one side of the exhaust port 200, allowing it to rotate outwards, thus providing a simple and direct pressure relief path. When the pressure inside the hot vent exceeds a preset value, the cover 310 is pushed open under pressure, directly releasing high-pressure steam. This design reduces complex mechanical parts, making pressure relief smoother and the response time faster, effectively ensuring that the pressure below the hot vent remains within a safe range. Furthermore, the cover valve has a simple structure and a lower failure rate, making it safer and more reliable. Additionally, the hinged design of the cover 310 to one side of the exhaust port 200 makes inspection, maintenance, or cleaning of the safety valve 300 very convenient; the cover 310 can be opened directly, facilitating inspection of the internal condition and necessary maintenance. Moreover, the hinged structure has high reliability and remains stable after multiple opening and closing cycles.

[0055] Furthermore, a counterweight 320 is provided on the outside of the cover plate 310. Since the counterweight 320 is located on the outside of the cover plate 310, in practical applications, the opening pressure of the cover plate 310 can be adjusted by using different counterweights. This method allows the opening pressure threshold of the safety valve 300 to be flexibly set by increasing or decreasing the weight of the counterweight according to the on-site working conditions, making the safety valve 300 more adaptable.

[0056] Optionally, a weight bracket 330 is provided on the outer side of the cover plate 310, and a counterweight 320 is sleeved on the weight bracket 330. This structure allows the counterweight 320 to be installed relatively stably on the outer side of the cover plate 310, and its position and weight can be flexibly adjusted.

[0057] In some embodiments, the first nozzle 411 and the second nozzle 4231 are both spiral nozzles, the second nozzle 4231 has a larger specification than the first nozzle 411, the first nozzle 411 is threadedly connected to the pipe of the first water line branch 410, and the second nozzle 4231 is threadedly connected to the bottom end of the nozzle branch pipe 423.

[0058] In the above embodiments, both the first nozzle 411 and the second nozzle 4231 adopt the form of spiral nozzles. The application of spiral nozzles enables the water flow to form a spiral flow trajectory during the spraying process, which can effectively increase the contact area between the cooling water and the high-temperature steel slag, thereby improving the cooling effect. Compared with ordinary straight nozzles, spiral nozzles have a wider water flow coverage, which can ensure that the water sprayed onto the surface of the steel slag is more uniform and reduce the risk of excessively high local temperatures.

[0059] Furthermore, this embodiment employs a design where the second nozzle 4231 is larger than the first nozzle 411, allowing for more rational water volume control at different stages. The larger size of the second nozzle 4231 compared to the first nozzle 411 enables precise control of the cooling water volume according to different cooling stages. During initial cooling, the smaller first nozzle 411 sprays a small amount of water, ensuring a gentle cooling process and preventing slag breakage due to a sudden temperature drop. During intermediate cooling, the larger second nozzle 4231 sprays a large amount of water, accelerating the cooling process and reducing the slag temperature.

[0060] Furthermore, both the first nozzle 411 and the second nozzle 4231 are connected by threads, making nozzle disassembly and replacement more convenient. After long-term operation, the nozzles need to be cleaned or replaced regularly due to scaling, wear, and other issues. The threaded connection simplifies the maintenance process, and the stable installation also ensures that the nozzle's angle and position will not shift during spraying.

[0061] Optionally, the first nozzle 411 is 1.5 inches in size and the second nozzle 4231 is 2 inches in size.

[0062] This application also provides a pressure-regulated steel slag cooling method, which uses the pressure-regulated steel slag hot slag cover provided in the above embodiments, and specifically includes the following steps:

[0063] Step 1: In the initial stage of hot quenching, high-temperature steel slag is loaded into the hot quenching pit and covered with a hot quenching cover to form a closed space.

[0064] Step 2: Supply a small amount of cooling water to the first water line branch 410 through the water inlet pipe 700 to initially spray and cool the high-temperature steel slag with a small amount of water.

[0065] Step 3: As the high-temperature steel slag comes into contact with the cooling water to generate steam, the pressure inside the hot quenching pit gradually increases. When the pressure reaches the preset opening value, the safety valve 300 automatically opens to release some of the pressure.

[0066] Step 4: While the safety valve 300 is open, the water flow control valve 500 is pulled by the pull valve control line 600 to open the water flow control valve 500. The second water line branch 420 sprays cooling water intermittently in large volume to further cool the steel slag.

[0067] Step 5: In the later stage of the cooling process, as the temperature of the steel slag decreases and the amount of steam decreases, the safety valve 300 automatically closes, and the water control valve 500 also automatically resets to the closed state. Water is sprayed only through the first water line branch 410. When the temperature of the steel slag drops low enough and no more significant steam is generated in the hot slag pit, the water valve of the inlet pipe 700 is closed, and water spraying to the steel slag is stopped, thus completing the final cooling.

[0068] Traditional methods of cooling steel slag using the hot quenching method rely heavily on manual judgment and adjustment of water volume, which has significant limitations. Operators struggle to accurately monitor the internal temperature changes of the steel slag during cooling, often resulting in excessive or insufficient cooling water. Excessive water can cause sudden cooling leading to cracks in the steel slag, while insufficient water fails to effectively lower the slag temperature. In contrast, the steel slag cooling method of this application employs a pressure-regulated hot quenching cover as described in the above-described embodiment. Utilizing the linkage mechanism between the safety valve 300 and the water volume control valve 500, water volume adjustment is directly correlated with pressure changes within the hot quenching pit. This not only achieves more precise water volume control but also allows for dynamic adjustment based on real-time pressure, significantly improving the accuracy and efficiency of the cooling process.

[0069] Traditional cooling methods typically employ a single water volume and spray pattern, which cannot be flexibly adjusted according to different stages of steel slag cooling. This single strategy struggles to simultaneously meet the demands of gentle initial cooling and rapid intermediate cooling, often resulting in low cooling efficiency. This application's embodiment proposes a staged cooling strategy based on pressure-regulated steel slag cooling: initially, a small water volume is sprayed through the first waterline branch 410 to prevent excessively rapid cooling and material cracking; in the intermediate stage, a large water volume is intermittently sprayed through the second waterline branch 420 to rapidly reduce the steel slag temperature. This staged water volume adjustment not only makes the cooling process more rational but also significantly improves cooling uniformity and overall efficiency.

[0070] Furthermore, existing cooling methods lack automated control, requiring operators to manually adjust the system under high temperature and pressure conditions. This is not only inefficient but also poses significant safety hazards. In this embodiment, the safety valve 300 and the water flow control valve 500 are linked via a pull valve control line 600. When the pressure exceeds a preset value, the safety valve automatically opens to release air, simultaneously driving the water flow control valve 500 to adjust the water flow. This linkage mechanism reduces the pressure inside the hot sump while simultaneously increasing the cooling water flow, thus avoiding potential equipment damage and safety risks caused by excessive pressure. This significantly improves the safety and stability of operation, reduces reliance on manual operation, and ensures the safety of operators.

[0071] Finally, it should be noted that 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 or all of the technical features therein. Such 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 this application.

Claims

1. A pressure-regulated hot slag smelting cover, characterized in that, The heat seal cover includes a heat seal cover body (100), an exhaust port (200), a safety valve (300), a water line pipeline system (400), a water flow control valve (500), and a water inlet pipe (700). The hot slag cover body (100) is set above the hot slag pit and is used to cover the hot slag pit to form a closed space. The exhaust port (200) is located on the top of the heat vent body (100) and is used to discharge the high-temperature and high-pressure steam generated in the heat vent. The safety valve (300) is installed at the exhaust port (200) and can be opened when the pressure in the hot sump exceeds a preset value and can open and close according to the pressure change in the hot sump. The water line pipeline system (400) is fixedly installed at the bottom end of the heat seal cover body (100), including a first water line branch (410) and a second water line branch (420). The first water line branch (410) is used for small water volume spraying, and the second water line branch (420) is used for medium-term large water volume intermittent spraying under the control of the water volume control valve (500). The water flow control valve (500) is located at the front end of the second water line branch (420). The water flow control valve (500) can be opened when pulled by the valve control line (600) and can be reset and closed when not pulled. One end of the valve control line (600) is connected to the water flow control valve (500), and the other end of the valve control line (600) is connected to the safety valve (300). The safety valve (300) is used to transmit the opening and closing actions of the safety valve (300) to the water flow control valve (500) to achieve linkage control. The water inlet pipe (700) is located on the outside of the heat seal cover body (100) and connected to the water line pipeline system (400) for supplying water to the first water line branch (410) and the second water line branch (420).

2. The steel slag hot smelting cover based on pressure regulation according to claim 1, characterized in that, The water flow control valve (500) is a pull valve. The valve stem of the water flow control valve (500) is connected to the pull valve control line (600). The water flow control valve (500) is reset to the closed state by a built-in spring.

3. The steel slag hot quenching cover based on pressure regulation according to claim 2, characterized in that, One end of the water inlet pipe (700) is located outside the heat seal cover body (100) and connected to a water source. The other end of the water inlet pipe (700) extends into the heat seal cover body (100) and is connected to the first water line branch (410) and the second water line branch (420). The water inlet end of the first water line branch (410) is connected to the pipe body of the water outlet end of the water inlet pipe (700). The water inlet end of the second water line branch (420) is connected to the end of the water outlet end of the water inlet pipe (700). The water flow control valve (500) is provided on the second water line branch (420) near the connection point with the water inlet pipe (700). The vent (200) is located above the water flow control valve (500) at the position corresponding to the heat seal cover body (100).

4. The steel slag hot smelting cover based on pressure regulation according to claim 3, characterized in that, The first water line branch (410) is located at the bottom end of the heat seal cover body (100) and is arranged linearly in the center. Multiple first nozzles (411) are evenly arranged on the pipe of the first water line branch (410). The second water line branch (420) is a symmetrical structure relative to the first water line branch (410) and is arranged in the bottom area of ​​the heat seal cover body (100). The second water line branch (420) includes an annular pipe (421), a branch pipe (422), and a nozzle branch pipe (423). One end of the annular pipe (421) is connected to the outlet end of the water inlet pipe (700), and the other end of the annular pipe (421) is a closed end and is connected to the water inlet pipe. (700) Fixed connection, the water volume control valve (500) is set on the annular pipe (421) and close to the water inlet end of the annular pipe (421). The nozzle branch pipe (423) is vertically arranged downward on a set of opposite pipes of the annular pipe (421), and the annular pipe (421) is also vertically arranged outward on the set of opposite pipes. The branch pipe (422) is at the same horizontal plane as the annular pipe (421). The nozzle branch pipe (423) is also vertically arranged downward on each branch pipe (422). The bottom end of each nozzle branch pipe (423) is equipped with a second nozzle (4231) for spraying water.

5. The steel slag hot smelting cover based on pressure regulation according to claim 1 or 2, characterized in that, The safety valve (300) is a cover valve installed at the exhaust port (200). The cover valve includes a cover plate (310) that is hinged to one side of the exhaust port (200) and can rotate outward. A counterweight (320) is provided on the outside of the cover plate (310) to adjust the opening pressure required when the cover plate (310) is opened.

6. The steel slag hot smelting cover based on pressure regulation according to claim 5, characterized in that, A weight bracket (330) is provided on the outside of the cover plate (310), and the counterweight (320) is sleeved on the weight bracket (330).

7. The steel slag hot smelting cover based on pressure regulation according to claim 4, characterized in that, Both the first nozzle (411) and the second nozzle (4231) are spiral nozzles. The second nozzle (4231) has a larger specification than the first nozzle (411). The first nozzle (411) is threaded to the pipeline of the first water line branch (410), and the second nozzle (4231) is threaded to the bottom end of the nozzle branch pipe (423).

8. The steel slag hot smelting cover based on pressure regulation according to claim 7, characterized in that, The first nozzle (411) is 1.5 inches in size, and the second nozzle (4231) is 2 inches in size.

Images