Steel slag pressure hot braising treatment device and method

Abstract

The present application discloses a steel slag pressure stewing treatment device and method, the device comprises a broken slag bed, a pressure stewing treatment tank, a first conveying device, a crusher and a second conveying device; the broken slag bed is used for crushing the steel slag; the pressure stewing treatment tank can pulverize the steel slag; the first conveying device is used for conveying the steel slag from the broken slag bed into the pressure stewing treatment tank; the crusher comprises a box body, a crushing mechanism, a screening net and a dredging structure; the crushing mechanism can crush the steel slag in the box body; the screening net is used for screening the steel slag crushed by the crushing mechanism; the dredging structure can intermittently dredge the mesh of the screening net when the crushing mechanism is started; and the second conveying device is used for conveying the steel slag from the pressure stewing treatment tank into the crusher. The treatment method adopts the device to treat the steel slag, and the steel slag pressure stewing treatment device can on-line dredge the mesh of the screening net, thereby improving the quality of the steel slag.

Description

Technical Field

[0001] This invention relates to the field of steel processing equipment technology, specifically to a pressurized hot quenching treatment device and method for steel slag. Background Technology

[0002] Steel slag is classified as solid waste in the steelmaking process, with enterprises producing approximately 600,000 tons of scrap steel annually. The raw steel slag contains a significant amount of metallic iron. The primary goal of steel slag treatment is to extract the maximum amount of metallic iron from the slag and return it to steelmaking, thus conserving resources. The next step is to comprehensively utilize the steel slag after iron selection to achieve a green cycle of solid waste from steelmaking. Over the past two decades, many developed countries with advanced steel industries have attached great importance to the treatment and utilization of steel slag, achieving a balance between production and consumption. my country started relatively late in steel slag treatment and utilization, and the depth of its treatment and utilization is insufficient. How to increase the treatment and comprehensive utilization of steel slag, turning waste into treasure, reducing pollution, and transforming it into high-tech, high-value-added products has become an urgent problem to be solved.

[0003] The current pressurized hot slag treatment method used by the company is as follows: After the steelmaking slag is discharged, the slag pot is transported to the slag bay, and the steel slag is poured onto the crushing bed for crushing and cooling with water spraying. Then, the crushed and cooled steel slag is placed in a closed pressure vessel, and water is sprayed to form saturated steam pressure for pressurized hot slag stabilization treatment. The hot-slag is then transported to the crusher for crushing and screening.

[0004] However, during the crushing and screening of hot-quenched steel slag, the screen of the crusher is easily clogged, resulting in uneven coarseness of the screened steel slag. Therefore, in order to improve the screening quality of steel slag, it is often necessary to stop the machine to clean the screen. However, since the screen is located inside the crusher, the cleaning work is inevitably inconvenient. At the same time, the need to stop the machine will inevitably affect the work efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the technical problem to be solved by this invention is to provide a pressurized hot slag treatment device and method for steel slag, which can unclog the screen holes of the screening mesh online, thereby improving the quality of steel slag.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a pressurized hot quenching treatment device for steel slag, comprising:

[0007] Crushing slag bed, used for crushing and grinding steel slag;

[0008] A pressurized hot quenching treatment tank is used to treat crushed steel slag in a closed hot quenching environment, causing the steel slag to decompose and pulverize.

[0009] The first conveying device is used to convey the steel slag from the crushed slag bed to the pressurized hot curing tank;

[0010] A crusher; the crusher includes a housing, a crushing mechanism, a screening screen, and a clearing structure: the top of the housing is provided with a feed inlet, the bottom of the housing is provided with a first discharge outlet, and the side wall of the housing is provided with a second discharge outlet; the crushing mechanism is disposed in the housing and can crush the steel slag inside the housing; the screening screen is disposed below the crushing mechanism and is used to screen the steel slag after crushing by the crushing mechanism, the steel slag passing through the screening screen flows out from the first discharge outlet, and the steel slag not passing through the screening screen flows out from the second discharge outlet; the clearing structure is disposed on the screening screen and connected to the crushing mechanism, and can simultaneously drive the clearing structure to intermittently clear the mesh of the screening screen when the crushing mechanism is started; and

[0011] The second conveying device is used to convey the steel slag from the pressurized hot curing tank to the crusher.

[0012] Furthermore, the crushing mechanism includes a rotary power source and two crushing hubs, which are arranged opposite to each other in the housing and located below the feed inlet for crushing the steel slag flowing in from the feed inlet. The rotating shaft of the rotary power source is connected to one of the crushing hubs, and the unblocking structure is connected to the rotating shaft of the rotary power source. The rotary power source can drive the unblocking structure to intermittently insert into the screen holes of the screening mesh.

[0013] Furthermore, the unblocking structure includes an mounting rod, a tilting rod, an unblocking rod, a first elastic connector, a pushing rod, and a tilting drive. The screen holes of the screening mesh are arranged in a matrix. An mounting rod is provided between every two adjacent screen holes, and the mounting rod is perpendicular to the lower surface of the screening mesh. The middle part of the tilting rod is hinged to the end of the mounting rod. An unblocking rod is provided at both ends of the tilting rod. When the tilting rod tilts up and down, the unblocking rods at both ends can be alternately inserted into the corresponding screen holes on the same side. The first elastic connector is connected to one end of the tilting rod and is connected to the bottom surface of the screening mesh. The pushing rod is arranged opposite to the first elastic connector, and one end of the pushing rod is connected to the bottom surface of the screening mesh, while the other end can slide against the tilting rod. The tilting drive is connected between the rotary power source of the crushing mechanism and the pushing rod. When the rotary power source rotates and the crushing hub rotates, the tilting drive can drive the pushing rod to move vertically back and forth perpendicular to the screening mesh.

[0014] Furthermore, an oil storage tank is provided between every two screen holes of the screening screen, and all the oil storage tanks are interconnected. The oil storage tanks can be filled with hydraulic oil. The tilting drive component includes a first cam, a first plug cylinder, a first piston, a first plug rod, a push plate, a second elastic connector, a second plug cylinder, and a second piston.

[0015] The first cam is sleeved and fixed on the rotating shaft of the rotary power source. The first plug cylinder is disposed on the outer wall of the screening screen and communicates with the oil storage tank therein. The first piston is disposed inside the first plug cylinder. The first plug rod is disposed on the first piston and extends out of the first plug cylinder. The push plate is disposed at the end of the first plug rod. The second elastic connector is connected between the push plate and the screening screen. The push plate always abuts against the first cam under the action of the second elastic connector. The second plug cylinder is disposed on the bottom surface of the screening screen and communicates with the corresponding oil storage tank. The second piston is disposed inside the second plug cylinder. The push rod is disposed on the second piston.

[0016] Furthermore, a roller is provided at the end of the push rod, and the push rod is tactilely connected to the rocker rod through the roller.

[0017] Furthermore, the unblocking structure also includes a lateral drive assembly, which is connected to the mounting rod and the tilting drive component, and is used to drive the mounting rod to slide back and forth in a direction parallel to the surface of the screening screen.

[0018] Furthermore, the lateral drive assembly includes a third piston, a pressure rod, a rack tooth, a central shaft, a driven gear, a second cam, and a third elastic connector;

[0019] The third piston is disposed inside the oil storage tank, and the central axis of the third piston is perpendicular to the mounting rod. The screening screen is provided with a mounting cavity adjacent to each of the oil storage tanks. The pressure rod is disposed on the third piston and extends out of the oil storage tank into the mounting cavity. The strip tooth is disposed on the pressure rod. The central axis is rotatably disposed in the mounting cavity. The driven gear is fixedly sleeved on the end of the central axis and meshes with the strip tooth.

[0020] The second cam is fixedly sleeved on the central shaft. The bottom surface of the screening screen has a groove that communicates with the mounting cavity. The middle part of the mounting rod is slidably locked in the groove by a sliding block, and the top end of the mounting rod extends into the mounting cavity and can slide along the groove. The third elastic connector connects the top end of the mounting rod to the inner wall of the mounting cavity. Under the pull of the third elastic connector, the top end of the mounting rod always abuts against the second cam.

[0021] A method for pressurized hot curing of steel slag, employing the aforementioned pressurized hot curing device for steel slag, comprising:

[0022] After the steelmaking slag is removed, the slag pot is transported to the slag bay, and the steel slag is poured onto the crushing slag bed for crushing and rolling, while water is sprayed for cooling.

[0023] The crushed and cooled steel slag is placed in a closed pressure vessel, and water is sprayed to form saturated steam pressure to perform pressurized hot simmering stabilization treatment on the steel slag.

[0024] The heated steel slag is then transported to a crusher for crushing and screening.

[0025] The beneficial effects of this invention are:

[0026] The aforementioned pressurized hot quenching treatment device and method for steel slag involves first adding the steel slag into a crushing bed, where it is crushed and cooled by water spraying. Then, the steel slag from the crushing bed is conveyed to a pressurized hot quenching treatment tank via a first conveying device. Water spraying creates saturated steam pressure, stabilizing the steel slag under pressurized hot quenching. After hot quenching, the steel slag is pulverized, slag and iron are separated, and the f-CaO and f-MgO in the steel slag are dissolved, eliminating the volume expansion of f-CaO and f-MgO upon contact with water. This prevents the tailings from failing stability tests during application and meets the requirements for building materials.

[0027] Next, the pulverized steel slag is conveyed to the crusher through the second conveying device for further crushing and screening. The steel slag with qualified particle diameter flows out from the first discharge port, while the unqualified steel slag flows out from the second discharge port and needs to be fed back into the crusher through the inlet for further crushing and screening.

[0028] Simultaneously, during the crushing process, the unblocking structure intermittently unclogs the mesh of the screening screen, thereby preventing screen blockage and improving screening quality and crushing speed. This, in turn, improves the overall quality of the steel slag.

[0029] By using this device and method, the screen can be blocked online due to the unblocking structure, thereby improving the screening quality and crushing speed, and thus improving the overall quality of the steel slag. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention, the accompanying drawings used in the specific embodiments will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to scale.

[0031] Figure 1 This is a schematic diagram of a pressurized hot quenching treatment device for steel slag according to an embodiment of the present invention;

[0032] Figure 2 for Figure 1 The diagram shown is an internal schematic of the crusher in a pressurized hot quenching treatment device for steel slag.

[0033] Figure 3 for Figure 1 A side view of a crusher in a pressurized hot quenching treatment device for steel slag is shown.

[0034] Figure 4 for Figure 1 The diagram shows a dredging structure in a pressurized hot quenching treatment device for steel slag.

[0035] Figure 5 for Figure 1 The diagram shows a dredging rod used for dredging in a pressurized hot slag treatment device for steel slag.

[0036] Figure label:

[0037] 100. Debris bed;

[0038] 200. Pressurized heat treatment tank;

[0039] 300. First conveying device;

[0040] 400. Crusher; 410. Housing; 411. Feed inlet; 412. First discharge outlet; 413. Second discharge outlet; 420. Crushing mechanism; 421. Rotary power source; 422. Crushing hub; 430. Screening screen; 440. Unblocking structure; 441. Mounting rod; 442. Tilter rod; 443. Unblocking rod; 444. First elastic connecting member; 445. Push rod; 446. Tilter drive member; 4461. First convex... 4462. Wheel; 4463. First stopper cylinder; 4464. First stopper rod; 4465. Push plate; 4466. Second elastic connector; 4466. Second stopper cylinder; 4467. Second piston; 447. Roller; 448. Lateral drive assembly; 4481. Third piston; 4482. Pressure rod; 4483. Strip tooth; 4484. Central shaft; 4485. Driven gear; 4486. Second cam; 4487. Third elastic connector;

[0041] 500. Second conveying device. Detailed Implementation

[0042] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0043] Please see Figures 1 to 5The present invention provides a pressurized hot quenching treatment device for steel slag, comprising a crushed slag bed 100, a pressurized hot quenching treatment tank 200, a first conveying device 300, a crusher 400, and a second conveying device 500.

[0044] Specifically, the crushing slag bed 100 is used to crush and grind the steel slag. The pressurized hot curing tank 200 is used to decompose and pulverize the crushed steel slag through a closed hot curing process. The first conveying device 300 is used to convey the steel slag from the crushing slag bed 100 into the pressurized hot curing tank 200.

[0045] Specifically, the crusher 400 includes a housing 410, a crushing mechanism 420, a screening screen 430, and a dredging structure 440. The housing 410 has an inlet 411 at its top, a first outlet 412 at its bottom, and a second outlet 413 on its side wall. The crushing mechanism 420 is located inside the housing 410 and crushes the steel slag within it. The screening screen 430 is located below the crusher 400 and is used to screen the crushed steel slag. Steel slag passing through the screening screen 430 flows out through the first outlet 412, while steel slag not passing through the screening screen 430 flows out through the second outlet 413.

[0046] The unblocking structure 440 is installed on the screening screen 430 and connected to the crusher 400. When the crusher 400 is started, the unblocking structure 440 is simultaneously driven to intermittently unblock the mesh of the screening screen 430. The second conveying device 500 is used to convey the steel slag from the pressurized hot quenching tank 200 to the crusher 400.

[0047] It should be noted that in this embodiment, the crushed slag bed 100, the pressurized hot quenching tank 200, the first conveying device 300 and the second conveying device 500 are all commonly used in the prior art.

[0048] The aforementioned pressurized hot quenching treatment device for steel slag involves first adding the steel slag into a crushing bed 100, where it is crushed and ground while being cooled by water spray. Then, the steel slag from the crushing bed 100 is conveyed to a pressurized hot quenching treatment tank 200 via a first conveying device 300. Water spraying creates saturated steam pressure, stabilizing the steel slag under pressurized hot quenching. After hot quenching, the steel slag is pulverized, slag and iron are separated, and the f-CaO and f-MgO in the steel slag are dissolved, eliminating the volume expansion of f-CaO and f-MgO upon contact with water. This prevents the tailings from becoming unstable when used, thus meeting the requirements for building materials.

[0049] Next, the pulverized steel slag is conveyed to the crusher 400 through the second conveying device 500 for crushing and screening again. The slag is screened by the screening screen 430. Steel slag with qualified particle diameter flows out from the first discharge port 412, while unqualified steel slag flows out from the second discharge port 413. It needs to be added back into the crusher 400 through the feed port 411 for crushing and screening again.

[0050] Simultaneously, during the crushing process, the unblocking structure 440 intermittently unblocks the mesh of the screening screen 430 online, thereby preventing screen blockage and improving screening quality and crushing speed. This, in turn, improves the overall quality of the steel slag.

[0051] By using this device, the screen can be prevented from clogging because the unblocking structure 440 can be unblocked online, thereby improving the screening quality and crushing speed, and thus improving the overall quality of the steel slag.

[0052] In this embodiment, the crushing mechanism 420 includes a rotary power source 421 and two crushing hubs 422. The two crushing hubs 422 are arranged opposite each other inside the housing 410 and located below the feed inlet 411 for crushing the steel slag flowing in from the feed inlet 411. The rotation shaft of the rotary power source 421 is connected to one of the crushing hubs 422, and the unblocking structure 440 is connected to the rotation shaft of the rotary power source 421. The rotary power source 421 can drive the unblocking structure 440 to intermittently insert into the screen holes of the screening screen 430.

[0053] It should be noted that the rotary power source 421 is any existing mechanism capable of driving the crushing hub 422 to rotate, such as a rotary motor.

[0054] Specifically, the unblocking structure 440 includes a mounting rod 441, a tilting rod 442, an unblocking rod 443, a first elastic connector 444, a pushing rod 445, and a tilting drive member 446. The screen holes of the screening mesh 430 are arranged in a matrix, with a mounting rod 441 between every two adjacent screen holes, and the mounting rod 441 is perpendicular to the lower surface of the screening mesh 430. The middle part of the tilting rod 442 is hinged to the end of the mounting rod 441. An unblocking rod 443 is provided at both ends of the tilting rod 442. When the tilting rod 442 tilts up and down, the unblocking rods 443 at both ends can be alternately inserted into the corresponding screen holes on the same side.

[0055] The first elastic connector 444 is connected to one end of the rocker arm 442 and is connected to the bottom surface of the screening screen 430. The push rod 445 is disposed opposite to the first elastic connector 444, with one end of the push rod 445 connected to the bottom surface of the screening screen 430 and the other end able to slide against the rocker arm 442. The rocker drive 446 is connected between the rotary power source 421 of the crusher 400 and the push rod 445. When the rotary power source 421 rotates and the crushing hub 422 rotates, the rocker drive 446 can drive the push rod 445 to move vertically back and forth perpendicular to the screening screen 430.

[0056] An oil storage tank is provided between every two screen holes of the screening screen 430, and all the oil storage tanks are interconnected. The tilting drive component 446 includes a first cam 4461, a first plug cylinder 4462, a first piston, a first plug rod 4463, a push plate 4464, a second elastic connector 4465, a second plug cylinder 4466, and a second piston 4467.

[0057] A first cam 4461 is sleeved and fixed on the rotating shaft of a rotary power source 421. A first plug cylinder 4462 is disposed on the outer wall of a screening screen 430 and communicates with the oil storage tank therein. A first piston is disposed inside the first plug cylinder 4462, and a first plug rod 4463 is disposed on the first piston and extends out of the first plug cylinder 4462. A push plate 4464 is disposed at the end of the first plug rod 4463. A second elastic connector 4465 connects the push plate 4464 and the screening screen 430, and the push plate 4464 is always in contact with the first cam 4461 under the action of the second elastic connector 4465. A second plug cylinder 4466 is disposed on the bottom surface of the screening screen 430 and communicates with the corresponding oil storage tank. A second piston 4467 is disposed inside the second plug cylinder 4466, and a push rod 445 is disposed on the second piston 4467.

[0058] In use, when the rotary power source 421 rotates, it drives the first cam 4461 to rotate. Through cooperation with the first elastic connector 444, it drives the first piston to move back and forth. Through the hydraulic oil in the oil reservoir, it drives the push rod 445 to move up and down repeatedly. With the cooperation of the first elastic connector 444, it drives the rocking rod 442 to rock up and down continuously, thereby driving the two unblocking rods 443 to continuously insert into the mesh of the screening screen 430, pushing out the steel slag blocking the mesh of the screening screen 430, thereby preventing the mesh of the screening screen 430 from being blocked.

[0059] This method not only prevents the mesh of the screening screen 430 from being blocked, but also improves the efficiency of the entire steel slag treatment by using online unblocking without stopping the machine. In addition, the power source for unblocking comes from the rotational power source 421 of the crusher 400, so no additional power source is needed, thus saving energy.

[0060] In a preferred embodiment, a roller 447 is provided at the end of the push rod 445, and the push rod 445 is rolledly connected to the rocker rod 442 through the roller 447. The roller 447 transforms sliding friction into rolling friction, further improving the stability of the rocker rod 442.

[0061] As another preferred embodiment, the unblocking structure 440 further includes a transverse drive assembly 448, which is connected to the mounting rod 441 and the tilting drive member 446, and is used to drive the mounting rod 441 to slide back and forth in a direction parallel to the surface of the screening screen 430.

[0062] Driven by the lateral drive component 448, the unblocking rod 443 can move laterally continuously while being inserted into the screen, further improving the unblocking effect.

[0063] Specifically, the lateral drive assembly 448 includes a third piston 4481, a pressure rod 4482, a rack tooth 4483, a central shaft 4484, a driven gear 4485, a second cam 4486, and a third elastic connector 4487.

[0064] The third piston 4481 is disposed inside the oil storage tank, and the central axis 4484 of the third piston 4481 is perpendicular to the mounting rod 441. A mounting cavity is provided adjacent to each oil storage tank on the screening screen 430. A pressure rod 4482 is disposed on the third piston 4481 and extends out of the oil storage tank into the mounting cavity. A strip tooth 4483 is disposed on the pressure rod 4482, and the central axis 4484 is rotatably disposed within the mounting cavity. A driven gear 4485 is fixedly sleeved on the end of the central axis 4484 and meshes with the strip tooth 4483.

[0065] The second cam 4486 is fixedly sleeved on the central shaft 4484, and the bottom surface of the screening screen 430 has a groove communicating with the mounting cavity. The middle part of the mounting rod 441 is slidably locked in the groove by a sliding block, and the top end of the mounting rod 441 extends into the mounting cavity and can slide along the groove. The third elastic connector 4487 connects the top end of the mounting rod 441 and the inner wall of the mounting cavity. Under the pull of the third elastic connector 4487, the top end of the mounting rod 441 always abuts against the second cam 4486.

[0066] When the first piston moves inward, it drives the second piston 4467 to move towards the mounting cavity, and then moves through the strip tooth 4483. When the second piston 4467 moves back and forth repeatedly, it drives the second cam 4486 to rotate, which in turn drives the mounting rod 441 to move left and right continuously, and finally drives the unblocking rod 443 to move left and right repeatedly, thereby achieving the purpose of further improving the unblocking effect.

[0067] This method, using a single power source, can achieve both axial and lateral unblocking of the screen, thus greatly improving the unblocking effect.

[0068] Furthermore, the present invention also provides a method for pressurized hot quenching treatment of steel slag, which employs the aforementioned pressurized hot quenching treatment device for steel slag, and the specific steps include:

[0069] S110. After the steelmaking slag is discharged, the slag pot is transported to the slag bay, and the steel slag is poured onto the crushing slag bed 100 for crushing and rolling, while water is sprayed for cooling.

[0070] S120. The crushed and cooled steel slag is placed in a pressurized hot quenching treatment tank 200, and water is sprayed to form saturated steam pressure to perform pressurized hot quenching stabilization treatment on the steel slag.

[0071] S130: The heated steel slag is conveyed to the crusher 400 for crushing and screening.

[0072] By using the above-mentioned pressurized hot slag treatment device and method for steel slag, the screen can be prevented from clogging because the unblocking structure 440 can be unblocked online, thereby improving the screening quality and crushing speed, and thus improving the overall quality of the steel slag.

[0073] By employing the aforementioned pressurized hot slag treatment device and method for steel slag, the screen can be prevented from clogging due to the online unblocking structure, thereby improving the screening quality and crushing speed, and ultimately enhancing the overall quality of the steel slag.

[0074] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features 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 the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A steel slag pressure hot-pot treatment device, characterized by comprising: a pressure vessel; a heating device; a stirring device; a slag inlet; a slag outlet; and a slag discharge device. The utility model relates to a steel slag processing system, which comprises: a crushing slag bed for crushing and rolling the steel slag; a pressurized hot stewing treatment tank for self-decomposing and pulverizing the steel slag by sealed hot stewing after the steel slag is crushed and rolled; a first conveying device for conveying the steel slag out of the crushing slag bed into the pressurized hot stewing treatment tank; a crusher, which comprises a box, a crushing mechanism, a screening net and a dredging structure; the top of the box is provided with an inlet, the bottom of the box is provided with a first outlet, and the sidewall of the box is provided with a second outlet; the crushing mechanism is arranged in the box and can crush the steel slag in the box; the screening net is arranged below the crushing mechanism and is used for screening the steel slag crushed by the crushing mechanism; the steel slag passing through the screening net flows out from the first outlet, and the steel slag not passing through the screening net flows out from the second outlet; the dredging structure is arranged on the screening net and is connected with the crushing mechanism; when the crushing mechanism is started, the dredging structure can simultaneously drive the screening net to be intermittently dredged; a second conveying device for conveying the steel slag out of the pressurized hot stewing treatment tank into the crusher; the crushing mechanism comprises a rotary power source and two crushing hubs; the two crushing hubs are oppositely arranged in the box and are located below the inlet and are used for crushing the steel slag flowing into the inlet; the rotary shaft of the rotary power source is connected with one of the crushing hubs; the dredging structure is connected with the rotary shaft of the rotary power source; the rotary power source can drive the dredging structure to be intermittently inserted into the screen hole of the screening net; the dredging structure comprises a mounting rod, a tilting rod, a dredging rod, a first elastic connecting piece, a pushing rod and a tilting driving piece; the screen holes of the screening net are arranged in a matrix shape; each two adjacent screen holes are provided with a mounting rod, and the mounting rod is perpendicular to the lower surface of the screening net; the middle part of the tilting rod is hinged to the end part of the mounting rod; the two ends of the tilting rod are provided with a dredging rod; when the tilting rod tilts up and down, the two ends of the dredging rod can alternately be inserted into the corresponding screen hole on the same side; the first elastic connecting piece is connected to one end of the tilting rod and is connected with the bottom surface of the screening net; the pushing rod is oppositely arranged with the first elastic connecting piece, one end of the pushing rod is connected with the bottom surface of the screening net, and the other end can slide against the tilting rod; the tilting driving piece is connected between the rotary power source of the crushing mechanism and the pushing rod; when the rotary power source rotates the crushing hub, the pushing rod can be driven by the tilting driving piece to vertically reciprocate up and down relative to the screening net; each two screen holes of the screening net are provided with an oil storage bin, and all the oil storage bins are connected with each other; the oil storage bin can be provided with hydraulic oil; the tilting driving piece comprises a first cam, a first plug cylinder, a first piston, a first plug rod, a push plate, a second elastic connecting piece, a second plug cylinder and a second piston. The first cam sleeve is fixed on the rotating shaft of the rotating power source, the first plug cylinder is arranged on the outer sidewall of the screening net and communicates with the oil storage bin, the first piston is arranged in the first plug cylinder, the first plug rod is arranged on the first piston and extends out of the first plug cylinder, the push plate is arranged at the end of the first plug rod, the second elastic connecting member is connected between the push plate and the screening net, the push plate always abuts against the first cam under the action of the second elastic connecting member, the second plug cylinder is arranged on the bottom surface of the screening net and communicates with the corresponding oil storage bin, and the second piston is arranged in the second plug cylinder.

2. The steel slag pressure braising treatment device according to claim 1, characterized by The end of the push rod is provided with a roller, and the push rod is in rolling connection with the swing rod through the roller.

3. The steel slag pressure braising treatment device according to claim 1, characterized by The dredging structure further comprises a transverse driving assembly connected with the mounting rod and the swing driving member, and used for driving the mounting rod to slide back and forth along a direction parallel to the surface of the screening net.

4. The steel slag pressure braising treatment device according to claim 3, characterized by The transverse driving assembly comprises a third piston, a pressing rod, a strip-shaped tooth, a central shaft, a driven gear, a second cam and a third elastic connecting member. The third piston is arranged in the oil storage bin, an installation cavity is arranged adjacent to each oil storage bin on the screening net, the pressing rod is arranged on the third piston and extends into the installation cavity from the oil storage bin, the strip-shaped tooth is arranged on the pressing rod, the central shaft is rotatably arranged in the installation cavity, the driven gear is fixedly sleeved on the end of the central shaft and in meshing connection with the strip-shaped tooth, and the second cam is fixedly sleeved on the central shaft. The bottom surface of the screening net is provided with a sliding groove in communication with the installation cavity, the middle part of the mounting rod is slidably clamped in the sliding groove through a sliding block, the top end of the mounting rod extends into the installation cavity and can slide along the sliding groove, and the third elastic connecting member is connected between the top end of the mounting rod and the inner sidewall of the installation cavity. Under the pulling of the third elastic connecting member, the top end of the mounting rod always abuts against the second cam.

5. A method for pressure retort treatment of steel slag, characterized by, The steel slag pressure hot braising treatment device comprises a steel slag crusher, a slag tank, a slag cross, a slag crushing bed, a water spraying device, a closed pressure container, a slag conveying device and a slag crusher. After slagging in steelmaking, the slag tank is transported to the slag cross, the steel slag is poured on the crushing slag bed, and crushing and rolling are performed while water is sprayed for cooling; The crushed and cooled steel slag is placed in the closed pressure container, saturated steam pressure is formed by spraying water, and pressure hot braising stabilization treatment is performed on the steel slag; The hot braised steel slag is conveyed to the crusher for crushing and screening.

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