Steel slag hot blank cap based on pressure regulation and cooling method thereof

Abstract

The invention provides a steel slag hot blank cap based on pressure regulation and a cooling method thereof, and relates to the technical field of metallurgy. The hot blank cap comprises a hot blank cap body, an exhaust port, a safety valve, a waterline pipeline system, a water quantity control valve and a water inlet pipe, the hot blank cap body is arranged above the steel slag hot blank pit, and the exhaust port is formed in the gas top part and used for discharging generated high-temperature and high-pressure steam; the safety valve is mounted at the exhaust port, can be opened when the pressure in the hot stuffy pit exceeds a preset value, and can be opened and closed along with the change of the pressure in the hot stuffy pit; the waterline pipeline system is fixedly arranged at the bottom end of the hot blank cap body and comprises a first waterline branch and a second waterline branch; the water quantity control valve is arranged at the front end of the second waterline branch, can be opened under the pulling of the pull valve control line and can be reset and closed when the pull valve control line is not pulled; the water inlet pipe is arranged on the outer side of the hot blank cap body and connected with the waterline pipeline system. According to the hot disintegration pit, accurate water quantity control can be achieved under the condition that the pressure in the hot disintegration pit dynamically changes, and the hot disintegration effect is good.

Description

Technical Field

[0001] The present application relates to the field of metallurgical technology, and in particular to a steel slag hot cover based on pressure regulation and a cooling method thereof. Background Art

[0002] Steel slag is a by-product of the steelmaking process in the steel industry. It has high temperature, high hardness and certain chemical activity. The resource utilization of steel slag is an important part of the circular economy and energy conservation and emission reduction of the steel industry. At present, the treatment methods of steel slag mainly include cooling, slag-iron separation and tailings stabilization. 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, the hot stuffing method has been 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 heat-stifling method, the heat-stifling cover is a key device. In the existing technology, the heat-stifling cover usually controls the cooling water volume manually, and the water volume adjustment at different stages depends on the operator's experience and judgment. These heat-stifling covers are usually equipped with exhaust holes and safety valves above the heat-stifling pit to release high-temperature steam and avoid safety hazards caused by excessive pressure. However, due to the lack of precision in manual water volume control, existing heat-stifling covers often have difficulty adjusting the water volume according to the real-time pressure changes during the heat-stifling process. This can easily lead to insufficient water volume in the early stage, low cooling efficiency, or excessive water volume in the middle stage, resulting in steam overflow, affecting the cooling effect and resource utilization. Summary of the Invention

[0004] The present application provides a steel slag hot stuffing cover based on pressure regulation and a cooling method thereof, so as to solve the problem in the prior art that the hot stuffing cover cannot realize water volume regulation according to the dynamic change of pressure in the hot stuffing pit.

[0005] In a first aspect, the present application provides a steel slag heat cover based on pressure regulation, comprising a heat cover body, an exhaust port, a safety valve, a waterline piping system, a water control valve and a water inlet pipe; The heat cover body is arranged above the slag heat pit and is used to cover the heat pit to form a closed space; The exhaust port is provided at the top of the heat-stifling cover body and is used to discharge the high-temperature and high-pressure steam generated in the heat-stifling pit; The safety valve is installed at the exhaust port and can open when the pressure in the hot pit exceeds a preset value and can open and close as the pressure in the hot pit changes; The water line pipeline system is fixedly arranged at the bottom end of the heat-suppressing cover body, and includes a first water line branch and a second water line branch. The first water line branch is used for spraying a small amount of water, and the second water line branch is used for intermittent spraying of a large amount of water in the medium term under the control of the water control valve; The water volume control valve is provided at the front end of the second water line branch. The water volume control valve can be opened when the pull valve control line is pulled and can be reset and closed when it is not pulled. One end of the pull valve control line is connected to the water volume control valve, and the other end of the pull valve control line is connected to the safety valve, so as to transmit the opening and closing actions of the safety valve to the water volume control valve to achieve linkage control; The water inlet pipe is arranged on the outside of the heat-suppressing cover body 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.

[0006] In an optional embodiment, the water control valve is a pull valve, the valve stem of the water control valve is connected to the pull valve control line, and the water control valve is reset to a closed state by a built-in spring.

[0007] In an optional embodiment, one end of the water inlet pipe is outside the heat stuffy cover body and is connected to a water source, the other end of the water inlet pipe extends into the heat stuffy 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 at the water outlet end of the water inlet pipe, 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 second water line branch is provided with the water volume control valve at a position close to the connection point with the water inlet pipe, and the exhaust port is provided at a position corresponding to the heat stuffy cover body above the water volume control valve.

[0008] In an optional embodiment, the first water line branch is located at the bottom end of the heat stuffy cover body and is arranged linearly in the center. A plurality of first nozzles are evenly arranged on the pipeline 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 end area of ​​the heat stuffy cover body. The second water line branch includes an annular pipeline, a branch pipe and a nozzle branch pipe. One end of the annular pipeline is connected to the water outlet end of the water inlet pipe. The water volume control valve is arranged on the annular pipeline and close to the water inlet end of the annular pipeline. The nozzle branch pipe is vertically arranged downward on a group of relative pipelines of the annular pipeline, and the annular pipeline also has a plurality of branch pipes vertically arranged outward on the group of relative pipelines. The branch pipe and the annular pipeline are in the same horizontal plane. The nozzle branch pipe is also vertically arranged downward on each branch pipe, and the bottom end of each nozzle branch pipe is installed with a second nozzle for spraying water.

[0009] In an optional embodiment, the safety valve is a cover valve installed at the exhaust port, and the cover valve includes a cover hinged to one side of the exhaust port and rotatable outward, and a counterweight is provided on the outer side of the cover for adjusting the opening pressure required for the cover when opening.

[0010] In an optional embodiment, a weight bracket is provided on the outer side of the cover plate, and the counterweight is sleeved on the weight bracket.

[0011] In an optional embodiment, the first nozzle and the second nozzle are both spiral nozzles, the specifications of the second nozzle are larger than those of the first nozzle, the first nozzle is threadedly connected to the pipeline of the first water line branch, and the second nozzle is threadedly connected to the bottom end of the nozzle branch.

[0012] In an optional embodiment, the specification of the first nozzle is 1.5 inches, and the specification of the second nozzle is 2 inches.

[0013] On the other hand, the present application also provides a steel slag cooling method based on pressure regulation, the method adopting the steel slag hot cover based on pressure regulation of the present application, comprising the following steps: Step 1: At the beginning of the hot stuffing, high-temperature steel slag is placed into the hot stuffing pit and covered with a hot stuffing cover to form a closed space; Step 2: Supply a small amount of cooling water to the first water line branch through the water inlet pipe to initially spray and cool the high-temperature slag; Step 3: As the high-temperature slag comes into contact with the cooling water to generate steam, the pressure in the hot pit gradually increases. When the pressure reaches the preset opening value, the safety valve automatically opens to release part of the pressure; Step 4: While the safety valve is opening, the water control valve is pulled by the valve control line to open the water control valve, and the second water line branch sprays cooling water intermittently in large quantities to further cool the slag; Step 5. In the later stage of the cooling process, as the slag temperature drops and the steam volume decreases, the safety valve automatically closes and the water control valve automatically resets to the closed state, and only the first water line branch is sprayed to complete the final cooling.

[0014] Compared with the prior art, this application has the following beneficial effects: 1. This application optimizes the structural design of the steel slag hot stuffing cover to achieve more accurate water volume control under dynamic pressure changes in the hot stuffing pit, thereby improving the hot stuffing effect. This application provides a water line pipeline system (first water line branch and second water line branch) with a double water line branch design at the bottom of the hot stuffing cover body, which can achieve more appropriate control of the water volume at different stages of the cooling process of the steel slag in the hot stuffing pit. The first water line branch is used for the initial small amount of water spraying, while the second water line branch can perform intermittent large amount of water spraying in the middle stage under the regulation and control of the water volume control valve. In this way, the water supply can better match the temperature and pressure changes of the steel slag during the hot stuffing process, thereby improving the hot stuffing effect. Moreover, through water volume regulation, the problems of uneven cooling and low efficiency caused by too much or too little water in traditional hot stuffing covers are avoided.

[0015] 2. This application utilizes a linked control mechanism between a safety valve and a water flow control valve. The safety valve automatically opens based on changes in the heat pit pressure, thereby driving the opening and closing of the water flow control valve via a pull-valve control line to regulate the water flow in the second waterline branch. This linked control method avoids the traditional heat pit cover's reliance on manual judgment and operation, 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 spray, effectively reducing operator labor intensity while improving the accuracy and consistency of water flow regulation. Furthermore, the safety valve automatically opens when the heat pit pressure exceeds a preset value, releasing high-temperature, high-pressure steam, effectively preventing equipment damage or safety hazards caused by excessive pressure within the heat pit. This design, linked to the water flow control valve, allows for effective venting and water flow regulation even when pressure is high. This avoids the issues that can occur with traditional heat pit covers, such as the inability to automatically vent due to excessive pressure or untimely water flow regulation, thereby improving the safety and stability of the system.

[0016] 3. The waterline piping system of this application can automatically adjust the water flow rate based on real-time pressure changes within the heat and humidity pit under the coordinated control of the safety valve and the water control valve. This dynamic water flow adjustment method can avoid excessive water waste. Compared with traditional manual water flow control methods, this automated adjustment not only reduces water waste but also avoids unsatisfactory heat and humidity effects caused by insufficient water flow, ultimately maximizing resource utilization efficiency. This water flow control method can reduce energy consumption, improve treatment efficiency, and thus improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A schematic structural diagram of a steel slag heat cover based on pressure regulation provided in one embodiment of the present application; Figure 2 This is an overall schematic diagram of the heat-blocking cover body provided in one embodiment of the present application; Figure 3 A schematic structural diagram of a waterline piping system provided in one embodiment of the present application.

[0019] In the figure: 100-heat-suffocating cover body; 200-exhaust port; 300-safety valve; 310-cover plate; 320-counterweight; 330-weight bracket; 400-water line piping system; 410-first water line branch; 411-first nozzle; 420-second water line branch; 421-annular pipeline; 422-branch pipe; 423-nozzle branch pipe; 4231-second nozzle; 500-water control valve; 600-pull valve control line; 700-water inlet pipe. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of this application.

[0021] See also Figure 1-Figure 3 The steel slag heat cover based on pressure regulation provided in the embodiment of the present application includes a heat cover body 100, an exhaust port 200, a safety valve 300, a water line pipeline system 400, a water control valve 500 and a water inlet pipe 700.

[0022] The heat-stifling cover body 100 is disposed above the slag heat-stifling pit and is used to cover the heat-stifling pit to form a closed space.

[0023] The exhaust port 200 is provided at the top of the heat-suffocating cover body 100 and is used to discharge the high-temperature and high-pressure steam generated in the heat-suffocating pit.

[0024] The safety valve 300 is installed at the exhaust port 200 and can be opened when the pressure in the hot pit exceeds a preset value and can be opened and closed as the pressure in the hot pit changes.

[0025] The water line piping system 400 is fixedly mounted at the bottom end of the heat-suppressing cover body 100 and includes a first water line branch 410 and a second water line branch 420. The first water line branch 410 is used for small-volume water spraying, and the second water line branch 420 is used for medium-term large-volume intermittent spraying under the control of the water control valve 500. The water volume control valve 500 is arranged at the front end of the second water line branch 420. The water volume control valve 500 can be opened when the valve pull control line 600 is pulled and can be reset and closed when it is not pulled. One end of the valve pull control line 600 is connected to the water volume control valve 500, and the other end of the valve pull control line 600 is connected to the safety valve 300, which is used to transmit the opening and closing actions of the safety valve 300 to the water volume control valve 500 to realize linkage control.

[0026] The water inlet pipe 700 is disposed outside the heat-suppressing 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 .

[0027] The pressure-regulated steel slag hot stuffing cover provided in the embodiment of the present application optimizes the structural design of the steel slag hot stuffing cover to achieve more precise water volume control under dynamic pressure changes in the hot stuffing pit, thereby improving the hot stuffing effect. In the embodiment of the present application, by providing a water line pipeline system 400 (including a first water line branch 410 and a second water line branch 420) with a dual water line branch design at the bottom end of the hot stuffing cover body 100, it is possible to achieve more appropriate control of the water volume at different stages of the cooling process of the steel slag in the hot stuffing pit. The first water line branch 410 is used for initial small water volume spraying, while the second water line branch 420 can perform medium-term large water volume intermittent spraying under the regulation and control of the water volume control valve 500. This method ensures that the water volume supply during the hot stuffing process can be better matched with the temperature and pressure changes of the steel slag, thereby improving the hot stuffing effect. Moreover, through water volume regulation, the problems of uneven cooling and low efficiency caused by excessive or insufficient water in traditional hot stuffing covers are avoided.

[0028] In this embodiment, a linkage control mechanism is employed between the safety valve 300 and the water flow control valve 500. The safety valve 300 automatically opens in response to pressure changes within the heat-stoking pit, thereby driving the opening and closing of the water flow control valve 500 via the pull-valve control line 600 to regulate the water flow in the second waterline branch 420. This linkage control method avoids the traditional heat-stoking cover's reliance on manual judgment and operation, reducing the impact of human factors on water flow regulation. The water flow control valve 500, linked to the safety valve 300 via the pull-valve control line 600, automatically adjusts the amount and frequency of water spraying, effectively reducing operator workload while improving the accuracy and consistency of water flow regulation.

[0029] Safety valve 300 automatically opens when the pressure inside the hot pit 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 pit. This design, linked to water control valve 500, effectively vents steam when pressure is high and simultaneously regulates the water volume. This avoids the issues that can occur with traditional hot pit covers, such as inability to automatically vent steam due to excessive pressure or delayed water volume adjustment, thereby improving the safety and stability of the system.

[0030] The waterline piping system 400 of the embodiment of the present application can automatically adjust the water flow rate based on real-time pressure changes within the heat and suffocation pit under the coordinated control of the safety valve 300 and the water control valve 500. This dynamic water flow adjustment method can avoid excessive waste of water resources. Compared with traditional manual water flow control methods, this automated regulation not only reduces water waste but also avoids unsatisfactory heat and suffocation effects caused by insufficient water flow, ultimately maximizing resource utilization efficiency. This water flow control method can reduce energy consumption, improve treatment efficiency, and thus lead to increased economic benefits.

[0031] In some embodiments, the water control valve 500 is a pull valve, the valve stem of the water control valve 500 is connected to the pull valve control line 600, and the water control valve 500 is reset to the closed state by a built-in spring.

[0032] In the above embodiment, the water flow control valve 500 is a pull valve, whose valve stem is connected to the pull valve control line 600. A built-in spring allows the water flow control valve 500 to automatically reset to a closed position when not being pulled by the pull valve control line 600. This reduces reliance on manual operation and implements an automatic reset control function. When the safety valve 300 is closed, the water flow control valve 500 quickly returns to its initial state, preventing excessive spraying of cooling water. This reset mechanism ensures water conservation and improved cooling accuracy during the cooling process, helping to reduce water waste and prevent overcooling. The water flow control valve 500 can be a pull valve commonly used in the art for opening and closing pipelines.

[0033] In practice, when the pull-valve control line 600 is pulled, the valve stem drives the valve core along the inner cavity of the valve body. This movement of the valve core changes the flow area within the valve, thereby controlling the water flow. When the pull-valve control line 600 is relaxed, the internal spring returns the valve stem and valve core to their initial position, closing the water flow path. This design, in which the valve core opens and closes in response to the movement of the valve stem, allows for rapid adjustment of the cooling water flow rate, reducing reliance on manual operation.

[0034] The two ends of the valve pull control line 600 are connected to the water control valve 500 and the safety valve 300, respectively. This connection achieves effective linkage between the two. Specifically, when the safety valve 300 opens, the valve pull control line 600 pulls the water control valve 500 to open. This linkage ensures synchronization between the water control valve 500 and the safety valve 300. This linkage design closely links the spraying of cooling water with pressure changes within the hot pit, enabling timely response to pressure changes within the system's hot pit and ensuring automatic regulation of the cooling process.

[0035] The working principle of the steel slag hot cover based on pressure regulation in the embodiment of the present application is as follows: In the early stage of hot stuffing, after the hot stuffing pit is loaded with high-temperature steel slag, the hot stuffing cover is closed. At this time, the temperature in the hot stuffing pit is extremely high. After the water valve of the water inlet pipe 700 is opened, water flows through the water inlet pipe 700 into the water line pipeline system 400 of the hot stuffing cover. Due to the early stage of hot stuffing, the pressure in the hot stuffing pit is relatively low, the safety valve 300 is in a closed state, and the water control valve 500 is not touched. The water control valve 500 is also in a closed state. No water flows through the second water line branch 420, and the first water line branch 410 is opened to water and starts to pump water in a small amount.

[0036] During the middle phase of the hot and humid period, the water sprayed from the first waterline branch 410 gradually contacts the high-temperature slag, generating a large amount of water vapor, which gradually increases the pressure in the hot and humid pit. When the pressure exceeds the design pressure, the high-temperature, high-pressure steam pushes open the safety valve 300. The opening of the safety valve 300 pulls the valve control line 600, at which point the water flow control valve 500 opens and water begins to flow through the second waterline branch 420. After a period of water spraying and exhaust from the second waterline branch 420, the pressure in the hot and humid pit decreases, causing the safety valve 300 to automatically close, and the water flow control valve 500 to automatically reset and close, and the second waterline branch 420 ceases to spray water. Since the safety valve 300 no longer vents, the pressure in the hot and stuffy pit will increase again after a period of time, and the safety valve 300 will open again, thereby realizing the reciprocating action of opening-closing-opening of the safety valve 300 under the action of high-pressure steam in the middle stage of hot and stuffy. Under this action, the water control valve 500 realizes intermittent water pumping of the second water line branch 420; in addition, the opening degree of the water control valve 500 is determined by the stroke of the safety valve 300. If the pressure in the hot and stuffy pit is large, the water control valve 500 will open widely and the water pumping amount will also be large. If the pressure in the hot and stuffy pit is small, the water control valve 500 will open slightly and the water pumping amount will also be small, thereby realizing the function of automatic control of water pumping in the middle stage of hot and stuffy.

[0037] In the later stage of hot stuffing, as the temperature of the slag in the hot stuffing pit continues to decrease, the amount of steam generated becomes less and less, the pressure in the hot stuffing pit cannot push the safety valve 300 to open, the water control valve 500 automatically closes, and water cannot flow in the second water line branch 420, so only a small flow of water is used for infiltration and water pumping by the first water line branch 410. When the temperature of the slag drops to a sufficiently low level and no significant steam is generated in the hot stuffing pit, the water valve of the water inlet pipe 700 is closed, and the spraying of water to the slag is stopped, completing the cooling process.

[0038] In some embodiments, one end of the water inlet pipe 700 is located outside the heat shield body 100 and connected to a water source. The other end of the water inlet pipe 700 extends into the heat shield body 100 and connects to the first waterline branch 410 and the second waterline branch 420. This allows cooling water to be delivered to both waterline branches to meet targeted spraying needs. The water inlet end of the first waterline branch 410 is connected to the pipe body at the outlet end of the water inlet pipe 700, and the water inlet end of the second waterline branch 420 is connected to the end of the outlet end of the water inlet pipe 700. The second waterline branch 420 is provided with a water flow control valve 500 near the connection point with the water inlet pipe 700. The water flow control valve 500 is arranged at this position so that the water flow control valve 500 can quickly respond to changes in water flow demand and adjust the amount of water entering the second waterline branch 420 in a short period of time. The exhaust port 200 is provided at a corresponding position on the heat shield body 100 above the water flow control valve 500. The first waterline branch 410 and the second waterline branch 420 are respectively connected to different positions of the water inlet pipe 700, so that the water outlet of the water inlet pipe 700 can achieve reasonable water flow distribution through the first waterline branch 410 and the second waterline branch 420, and by setting the water volume control valve 500, it is convenient to use the first waterline branch 410 and the second waterline branch 420 for water spray cooling in different cooling stages. In addition, in this embodiment, the water inlet ends of the first waterline branch 410 and the second waterline branch 420 are respectively connected to the pipe body and the end of the water outlet end of the water inlet pipe 700. This connection method effectively avoids mutual interference between the two waterline branches, allowing each branch to work independently. During the cooling process, the first waterline branch 410 is used for small water spraying in the initial stage, while the second waterline branch 420 is used for large water spraying in the middle stage. This non-interfering layout method allows the two cooling methods to fully play their role in different time periods.

[0039] In some embodiments, the first water line branch 410 is located at the bottom end of the heat stuffy 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. A plurality of first nozzles 411 are evenly arranged on the pipeline 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 nozzle 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 end area of ​​the heat stuffy cover body 100. The second water line branch 420 includes an annular pipeline 421, a branch pipe 422 and a nozzle branch pipe 423. One end of the annular pipeline 421 is connected to the water outlet end of the water inlet pipe 700 The water volume control valve 500 is arranged on the annular pipeline 421 and close to the water inlet end of the annular pipeline 421. A nozzle branch pipe 423 is vertically arranged downward on a group of relative pipelines of the annular pipeline 421, and the annular pipeline 421 also has multiple branch pipes 422 vertically arranged outward on the group of relative pipelines. The branch pipes 422 and the annular pipeline 421 are in the same horizontal plane. A nozzle branch pipe 423 is also vertically arranged downward on each branch pipe 422. 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. The bottom end of each nozzle branch pipe 423 is equipped with a second nozzle 4231 for spraying water.

[0040] In the above embodiment, the first waterline branch 410 is located at the bottom end of the heat-stifling cover body 100 and arranged linearly in the center, with multiple first nozzles 411 evenly distributed on the pipeline. The second waterline branch 420 is arranged symmetrically with respect to the first waterline branch 410 and is located in the bottom area of ​​the heat-stifling cover body 100. This layout ensures that when large amounts of spray cooling are required during the mid-stage cooling phase, the cooling water spray can effectively cover the entire slag area below the heat-stifling cover, thereby achieving good uniformity during the cooling process.

[0041] In the second waterline branch 420, a multi-layered piping layout is formed between the ring pipe 421, branch pipes 422, and nozzle branch pipes 423. The ring pipe 421 forms a closed-loop water supply structure, making the cooling water supply more reliable. Even if a branch pipe 422 becomes clogged, water can still be replenished through other paths in the ring pipe 421. This combination of ring and branch design improves the flexibility and reliability of the cooling water supply, ensuring that the water flow during the cooling process is not interrupted by local problems, thereby maintaining a continuous and effective cooling effect.

[0042] In addition, the nozzle branch pipe 423 in the second waterline branch 420 is arranged perpendicular to the annular pipe 421 and the branch pipe 422, and the bottom end of each nozzle branch pipe 423 is installed with a second nozzle 4231 for spraying water. This vertical arrangement enables the cooling water to act directly on the surface of the slag, reducing the energy lost by the water due to collision or diffusion during the spraying process. The vertically arranged nozzle branch pipe 423 enables the water flow to reach the area that needs cooling in the most direct way, thereby 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 the waste of water, thereby achieving more precise cooling control.

[0043] In some embodiments, the safety valve 300 is a cover valve installed at the exhaust port 200. The cover valve includes a cover 310 that is hinged to one side of the exhaust port 200 and can be rotated outward. A counterweight 320 is provided on the outside of the cover 310 for adjusting the opening pressure required when the cover 310 is opened.

[0044] In the above embodiment, the safety valve 300 adopts the form of a cover valve, and the cover 310 is hinged to one side of the exhaust port 200 and can be rotated outward, thereby providing a simple and direct pressure discharge path. When the pressure in the hot and stuffy pit exceeds the preset value, the cover 310 is pushed open under the action of pressure, directly releasing the high-pressure steam. This design reduces complex mechanical components, makes the pressure discharge smoother, and the response time faster, which can effectively ensure that the pressure under the hot and stuffy cover remains within a safe range. In addition, the cover valve has a simple structure and a lower failure rate, making it safer and more reliable. In addition, the design of the cover 310 being hinged to one side of the exhaust port 200 makes it very convenient to operate when the safety valve 300 needs to be inspected, maintained or cleaned. The cover 310 can be opened directly, making it easy to check the internal status and perform necessary maintenance work. Moreover, the hinged structure has high reliability and can remain stable after being opened and closed multiple times.

[0045] Furthermore, a counterweight 320 is provided on the outside of the cover plate 310. Since the counterweight 320 is provided on the outside of the cover plate 310, in actual application, the opening pressure of the cover plate 310 can be adjusted by using different counterweight weights. 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 working conditions on site, making the safety valve 300 more adaptable.

[0046] Optionally, a weight bracket 330 is provided on the outside of the cover 310, and the counterweight 320 is sleeved on the weight bracket 330. This structure allows the counterweight 320 to be installed more firmly on the outside of the cover 310, and its position and weight can be flexibly adjusted.

[0047] In some embodiments, the first nozzle 411 and the second nozzle 4231 are both spiral nozzles, the specifications of the second nozzle 4231 are larger than those of the first nozzle 411, the first nozzle 411 is threadedly connected to the pipeline of the first waterline branch 410, and the second nozzle 4231 is threadedly connected to the bottom end of the nozzle branch 423.

[0048] In the above embodiment, both the first nozzle 411 and the second nozzle 4231 utilize spiral nozzles. The use of spiral nozzles enables the water flow to form a spiral trajectory during the spraying process, effectively increasing the contact area between the cooling water and the hot slag, thereby enhancing the cooling effect. Compared to conventional linear nozzles, spiral nozzles provide a wider water flow coverage area, ensuring a more uniform distribution of water on the slag surface and reducing the risk of localized overheating.

[0049] In addition, this embodiment adopts a design method in which the specifications of the second nozzle 4231 are larger than those of the first nozzle 411, so that the water volume control at different stages is more reasonable. The specifications of the second nozzle 4231 are larger than those of the first nozzle 411. This differentiated design enables the cooling water volume to be more accurately controlled according to different cooling stages. During the initial cooling, a small amount of water is sprayed through the first nozzle 411 with a smaller specification, which can control the gentle progress of the cooling process and prevent the slag from cracking due to a sudden drop in temperature. During the mid-term cooling, a large amount of water is sprayed in combination with the second nozzle 4231 with a larger specification, which can speed up the cooling process and thus reduce the temperature of the slag.

[0050] Furthermore, both the first nozzle 411 and the second nozzle 4231 are threaded together for easy removal and replacement. After extended use, nozzles may require regular cleaning or replacement due to scaling and wear. The threaded connection simplifies maintenance and provides a secure installation that prevents the nozzles from shifting in angle and position during spraying.

[0051] Optionally, the specification of the first nozzle 411 is 1.5 inches, and the specification of the second nozzle 4231 is 2 inches.

[0052] The present application also provides a steel slag cooling method based on pressure regulation. The method adopts the steel slag heat cover based on pressure regulation provided in the above embodiment, and specifically includes the following steps: Step 1: At the beginning of the hot stuffing, high-temperature steel slag is placed into the hot stuffing pit and covered with a hot stuffing cover to form a closed space; 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 slag; Step 3: As the high-temperature slag comes into contact with the cooling water to generate steam, the pressure in the hot pit gradually increases. When the pressure reaches the preset opening value, the safety valve 300 automatically opens to release part of the pressure; Step 4: While the safety valve 300 is opening, the water control valve 500 is pulled by the valve pull control line 600 to open the water control valve 500. The second water line branch 420 sprays cooling water intermittently in large quantities to further cool the slag. Step 5. In the later stage of the cooling process, as the temperature of the 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, and only spraying is carried out through the first water line branch 410. When the temperature of the slag drops to a sufficiently low level and no significant steam is generated in the hot pit, the water valve of the water inlet pipe 700 is closed, and the spraying of water to the slag is stopped, completing the final cooling.

[0053] The traditional method of cooling steel slag by heat stuffing mainly relies on manual judgment and manual adjustment of water volume, which has obvious limitations. It is difficult for operators to accurately grasp the internal temperature changes of steel slag during the cooling process, which often leads to too much or too little cooling water. Too much water may cause sudden cooling and cracks in the steel slag, while insufficient water makes it difficult to effectively reduce the temperature of the steel slag. In contrast, the steel slag cooling method of the embodiment of the present application adopts the steel slag heat stuffing cover based on pressure regulation provided by the above-mentioned embodiment of the present application, and utilizes the linkage mechanism of the safety valve 300 and the water control valve 500, so that the water volume regulation is directly related to the pressure change in the heat stuffing pit. This not only achieves more accurate water volume control, but also can be dynamically adjusted according to real-time pressure, greatly improving the accuracy and efficiency of the cooling process.

[0054] Traditional cooling methods usually use a single water volume and spraying pattern, which cannot be flexibly adjusted according to the different stages of slag cooling. This single strategy is difficult to meet the needs of mild cooling in the early stage and rapid cooling in the middle stage, which often leads to inefficient cooling process. The embodiment of the present application is based on a pressure-regulated slag cooling method, and proposes a staged cooling strategy: in the early stage, a small amount of water is sprayed through the first water line branch 410 to avoid excessive cooling and causing material cracks; in the middle stage, a large amount of water is intermittently sprayed through the second water line branch 420 to quickly reduce the temperature of the slag. This staged water volume regulation not only makes the cooling process more reasonable, but also significantly improves the uniformity and overall efficiency of the cooling.

[0055] In addition, due to the lack of automated control methods in existing cooling methods, operators need to manually adjust the cooling system under high temperature and high pressure environments, which is not only inefficient but also poses a significant safety hazard. In the embodiment of the present application, the safety valve 300 and the water 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 exhaust air and simultaneously drives the water control valve 500 to adjust the water volume. This linkage mechanism reduces the pressure in the hot pit while promptly increasing the cooling water volume, thereby avoiding equipment damage and safety risks that may be caused by excessive pressure, significantly improving the safety and stability of use, reducing reliance on manual operation, and ensuring the safety of operators.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A steel slag heat cover based on pressure regulation, characterized in that: The heat-blocking cover comprises a heat-blocking cover body (100), an exhaust port (200), a safety valve (300), a waterline pipeline system (400), a water volume control valve (500), and a water inlet pipe (700); The heat-stifling cover body (100) is arranged above the slag heat-stifling pit and is used to cover the heat-stifling pit to form a closed space; The exhaust port (200) is provided at the top of the heat-stifling cover body (100) and is used to discharge high-temperature and high-pressure steam generated in the heat-stifling pit; The safety valve (300) is installed at the exhaust port (200) and can be opened when the pressure in the hot pit exceeds a preset value and can be opened and closed as the pressure in the hot pit changes; The water line pipeline system (400) is fixedly arranged at the bottom end of the heat-stifling cover body (100), and comprises a first water line branch (410) and a second water line branch (420), wherein the first water line branch (410) is used for spraying a small amount of water, and the second water line branch (420) is used for performing intermittent spraying of a large amount of water in the medium term under the control of the water control valve (500); The water control valve (500) is arranged at the front end of the second water line branch (420), and the water control valve (500) can be opened when pulled by the pull valve control line (600) and can be reset and closed when not pulled. One end of the pull valve control line (600) is connected to the water control valve (500), and the other end of the pull valve control line (600) is connected to the safety valve (300), so as to transmit the opening and closing actions of the safety valve (300) to the water control valve (500) to achieve linkage control; The water inlet pipe (700) is arranged outside the heat-suppressing cover body (100) and is 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).

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

3. The steel slag heat cover based on pressure regulation according to claim 2 is characterized in that: One end of the water inlet pipe (700) is located outside the heat-stifling cover body (100) and is connected to a water source. The other end of the water inlet pipe (700) extends into the heat-stifling 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 at 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 volume control valve (500) is provided at a position of the second water line branch (420) close to the connection point with the water inlet pipe (700). The exhaust port (200) is provided at a position corresponding to the heat-stifling cover body (100) above the water volume control valve (500).

4. The slag heat cover based on pressure regulation according to claim 3 is characterized in that: The first water line branch (410) is located at the bottom end of the heat-stifling cover body (100) and is arranged linearly in the center. A plurality of first nozzles (411) are evenly arranged on the pipeline 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 end area of ​​the heat-stifling cover body (100). The second water line branch (420) includes an annular pipeline (421), a branch pipe (422) and a nozzle branch pipe (423). One end of the annular pipeline (421) is connected to the water outlet end of the water inlet pipe (700), and the other end of the annular pipeline (421) is a closed end and is connected to the water inlet pipe. (700) is fixedly connected, the water control valve (500) is arranged on the annular pipeline (421) and close to the water inlet end of the annular pipeline (421), the nozzle branch pipe (423) is vertically arranged downward on a group of relative pipelines of the annular pipeline (421), and the annular pipeline (421) is also vertically arranged outward on the group of relative pipelines. A plurality of branch pipes (422) are vertically arranged outward, the branch pipes (422) and the annular pipeline (421) are in the same horizontal plane, and each branch pipe (422) is also vertically arranged downward on the nozzle branch pipe (423), and the bottom end of each nozzle branch pipe (423) is installed with a second nozzle (4231) for spraying water.

5. The steel slag heat cover based on pressure regulation according to claim 1 or 2, characterized in that: The safety valve (300) is a cover plate valve installed at the exhaust port (200), comprising a cover plate (310) hinged to one side of the exhaust port (200) and rotatable outwards, and a counterweight (320) is provided on the outer side of the cover plate (310) for adjusting the opening pressure required for the cover plate (310) to open.

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

7. The steel slag heat cover based on pressure regulation according to claim 4 is characterized in that: The first nozzle (411) and the second nozzle (4231) are both spiral nozzles. The specifications of the second nozzle (4231) are larger than those of the first nozzle (411). The first nozzle (411) is threadedly connected to the pipeline of the first waterline branch (410), and the second nozzle (4231) is threadedly connected to the bottom end of the nozzle branch pipe (423).

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

9. A steel slag cooling method based on pressure regulation, characterized in that: The method adopts the steel slag hot cover based on pressure regulation according to any one of claims 1 to 8, comprising the following steps: Step 1: At the initial stage of heat stuffing, high-temperature steel slag is placed into the heat stuffing pit and covered with the heat stuffing cover as described in any one of claims 1 to 8 to form a closed space; Step 2: supplying 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 slag; Step 3: As the high-temperature slag contacts the cooling water to generate steam, the pressure in the hot pit gradually increases. When the pressure reaches a preset opening value, the safety valve (300) automatically opens to release part of the pressure. Step 4: While the safety valve (300) is open, the water control valve (500) is pulled by the valve pull control line (600) to open the water control valve (500), and the second water line branch (420) sprays cooling water intermittently in large quantities to further cool the slag; Step 5: In the later stage of the cooling process, as the slag temperature decreases and the steam volume decreases, the safety valve (300) automatically closes and the water volume control valve (500) also automatically resets to the closed state, and only spraying is performed through the first water line branch (410) to complete the final cooling.

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