Blast furnace slag treatment device

Abstract

This application provides a blast furnace slag treatment device, including a slag bin, a vibrating dewatering screen below the slag bin, and a water collection tank below the vibrating dewatering screen to collect the water separated by the vibrating dewatering screen. A vertically movable guide box is located below the discharge port of the slag bin. Inside the guide box are fixed dewatering screens arranged at an incline for feeding material to the vibrating dewatering screen. A water conveying pipe extending above the water collection tank is connected to the lower part of the guide box. When the guide box moves upward, the dewatering screens can block the discharge port of the slag bin. This application can effectively separate slag and water under the action of the dewatering screens and the vibrating dewatering screen, improving the dewatering effect of the slag.

Description

Technical Field

[0001] This application relates to slag treatment technology, and more particularly to a blast furnace slag treatment device. Background Technology

[0002] In the steelmaking process, the slag produced by the blast furnace is usually first quenched in water to form slag. Then the slag flows into the settling tank. After settling in the settling tank, the slag is grabbed by the overhead crane grab bucket and hoisted into the slag bin. Then it is left to stand and dehydrate in the slag bin. After dehydration, it is transported to the slag storage silo by belt conveyor.

[0003] However, after the slag is left to stand and dehydrate in the slag bin, it still contains a certain amount of water. Not only is the dehydration incomplete and the dehydration effect poor, but the slag is also prone to spillage when the belt conveyor transports it. Utility Model Content

[0004] This application provides a blast furnace slag treatment device to solve the problem of poor dewatering effect of existing slag.

[0005] This application provides a blast furnace slag treatment device, including a slag bin, a vibrating dewatering screen is provided below the slag bin, and a water collection tank is provided below the vibrating dewatering screen to collect the water separated by the vibrating dewatering screen.

[0006] Below the discharge port of the slag bin is a guide box that can move up and down. Inside the guide box are fixed dewatering screens that are inclined and used to feed material to the vibrating dewatering screen. The lower part of the guide box is connected to a water supply pipe that extends to the top of the water collection tank.

[0007] After the feed box moves upward, the dewatering mesh plate can block the discharge port of the slag bin.

[0008] Optionally, the feed box is connected to two synchronously telescopic hydraulic cylinders, and the hydraulic cylinders are installed at the bottom of the slag bin.

[0009] Optionally, a plurality of guide components I distributed along the width direction of the dewatering mesh plate are installed on the upper end of the lower part of the dewatering mesh plate. The guide components I have a V-shaped plate structure and the open end of the guide components I faces the lower end of the dewatering mesh plate.

[0010] There is a gap between two adjacent guide components I, and a guide component II is fixed to the upper end of the dewatering screen plate at an angle above the two adjacent guide components I. The guide component II has the same structure as the guide component I.

[0011] Optionally, the upper end of the dewatering screen is fixed with a material-pulling rod extending into the slag bin.

[0012] Optionally, the vibrating dewatering screen includes a screen box, the inside of which is provided with a dewatering screen, and a vibrator is installed at the upper end of the screen box. The screen box is connected to a frame via a spring assembly.

[0013] The lower part of the sieve box has a bucket-shaped structure, and the lower end of the sieve box has a drain outlet located above the water collection tank.

[0014] The blast furnace slag treatment device provided in this application includes a vibrating dewatering screen located below the slag bin, and a water collection tank located below the vibrating dewatering screen to collect the water separated by the vibrating dewatering screen. A vertically movable guide box is located below the discharge port of the slag bin. Inside the guide box are fixed dewatering screens arranged at an incline for feeding the vibrating dewatering screen. A water conveying pipe extending above the water collection tank is connected to the lower part of the guide box. When the guide box moves upward, the dewatering screens can block the discharge port of the slag bin, so that during use, the slag in the slag bin first falls from the discharge port of the slag bin onto the dewatering screens, and then the water... The slag flows along the dewatering screen to the vibrating dewatering screen for dewatering. When the slag flows along the dewatering screen, a portion of the water in the slag passes through the screen and falls to the bottom of the feed box. This means that the slag can be pre-dewatered before entering the vibrating dewatering screen, reducing its water content. When the slag falls onto the vibrating dewatering screen, its reduced water content allows for thorough dewatering under the vibration of the screen. Compared to existing static dewatering methods, the slag and water can be effectively separated by the dewatering screen and the vibrating dewatering screen, improving the dewatering effect. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a schematic diagram of the main structure of the blast furnace slag treatment device provided in the embodiments of this application;

[0017] Figure 2 This is a three-dimensional structural schematic diagram of the blast furnace slag treatment device provided in the embodiments of this application;

[0018] Figure 3 This is a partial three-dimensional structural diagram of the blast furnace slag treatment device provided in the embodiments of this application;

[0019] Figure 4 This is a partial front view cross-sectional structural diagram of the dewatering mesh plate after blocking the outlet of the slag bin, as provided in an embodiment of this application.

[0020] Figure 5 A three-dimensional structural diagram of the vibrating dewatering screen of the blast furnace slag treatment device provided in the embodiments of this application.

[0021] Explanation of reference numerals in the attached drawings: 1. Slag bin; 2. Vibrating dewatering screen; 201. Screen box; 202. Dewatering screen; 203. Vibrator; 204. Spring assembly; 205. Frame; 206. Drain outlet; 3. Water collection box; 4. Guide box; 5. Dewatering screen plate; 6. Water conveying pipe; 7. Hydraulic cylinder; 8. Connecting plate I; 9. Connecting plate II; 10. Guide component I; 11. Guide component II; 12. Pushing rod. Detailed Implementation

[0022] 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.

[0023] like Figures 1-5 As shown:

[0024] An embodiment of this application provides a blast furnace slag treatment device, including a slag bin 1, a vibrating dewatering screen 2 below the slag bin 1, and a water collection tank 3 below the vibrating dewatering screen 2, which collects the water separated by the vibrating dewatering screen 2.

[0025] In this embodiment, a support frame is also included, and the water slag bin 1 is fixed on the support frame, which supports the water slag bin 1.

[0026] Below the discharge port of the slag bin 1 is a vertically movable guide box 4. Specifically, the guide box 4 is a hollow structure with openings at both the top and upper left ends. Inside the guide box 4, dewatering screens 5, which are inclined and used to feed material to the vibrating dewatering screen 2, are detachably fixed by bolts. Specifically, the lower inclined end of the dewatering screen 5 is located at the left end of the guide box 4. A water conveying pipe 6, extending to the top of the water collection tank 3, is connected to the lower part of the guide box 4. Specifically, one end of the conveying pipe passes through the lower part of the guide box 4 and is sealed and welded to the guide box 4.

[0027] After the feed box 4 moves upward, the dewatering screen plate 5 can block the discharge port of the slag bin 1. Specifically, the lower end of the discharge port of the slag bin 1 is inclined, and the lower end of the discharge port of the slag bin 1 and the dewatering screen plate 5 have the same inclination direction and inclination degree. This allows the dewatering screen plate 5 to completely contact the lower end of the discharge port of the slag bin 1 after it moves upward with the feed box 4, thereby blocking the discharge port of the slag bin 1, that is, closing the discharge port of the slag bin 1.

[0028] In use, the overhead crane grabs the sludge in the sedimentation tank and hoists it into the sludge bin 1. The sludge in the sludge bin 1 falls from the discharge port onto the inclined dewatering screen 5. The sludge slides down the dewatering screen 5 under its own weight onto the vibrating dewatering screen 2. As the sludge slides down the dewatering screen 5, some of the water in the sludge passes through the dewatering screen 5 and falls to the bottom of the feed box 4, and then falls into the water collection box 3 through the conveying pipe. After the sludge falls onto the vibrating dewatering screen 2, it is dewatered by the vibration of the vibrating dewatering screen 2, effectively separating the sludge from the water. The water separated by the vibrating dewatering screen 2 flows into the water collection box 3, which collects the water separated during the sludge dewatering process.

[0029] When a malfunction occurs and maintenance is required, the feed box 4 is moved upwards, and the dewatering screen 5 moves upwards synchronously with the feed box 4. When the dewatering screen 5 presses tightly against the discharge port of the water slag bin 1, the movement of the feed box 4 is stopped. At this time, the dewatering screen 5 blocks the discharge port of the water slag bin 1, that is, it closes the discharge port of the water slag bin 1, and stops the feeding operation of the vibrating dewatering screen 2. After the dewatering screen 5 closes the discharge port of the water slag bin 1, the water slag remains in the water slag bin 1. Some of the water in the water slag will flow down due to its own gravity and flow through the bottom of the feed box 4 through the dewatering screen 5, and then flow into the water collection tank 3 from the conveying pipe. Thus, after the discharge port of the water slag bin 1 is closed, the water flowing out of the discharge port of the water slag bin 1 can be collected to prevent the water flowing to the discharge port of the water slag bin 1 from falling to other places and affecting maintenance work.

[0030] The blast furnace slag treatment device provided in this embodiment has a vibrating dewatering screen 2 installed below the slag bin 1, and a guide box 4 that can move up and down is installed below the discharge port of the slag bin 1. The guide box 4 has a dewatering screen plate 5 that is fixed inside it at an incline. After the guide box 4 moves up, the dewatering screen plate 5 can block the discharge port of the slag bin 1, so that the slag can be pre-dewatered before entering the vibrating dewatering screen 2 during use, reducing the water content of the slag. When the slag falls onto the vibrating dewatering screen 2 for dewatering, the water content of the slag is reduced, so the slag can be fully dewatered under the vibration of the vibrating dewatering screen 2. Therefore, compared with the existing static dewatering method, the slag and water can be effectively separated under the action of the dewatering screen plate 5 and the vibrating dewatering screen 2, thus improving the dewatering effect of the slag. Furthermore, since the feed box 4 can move up and down, the distance between the dewatering screen 5 and the outlet of the water slag bin 1 can be adjusted after the feed box 4 moves up and down. When the distance between the dewatering screen 5 and the outlet of the water slag bin 1 increases, more water slag falls onto the dewatering screen 5, which means the feed rate of the dewatering screen 5 is large. When the distance between the dewatering screen 5 and the outlet of the water slag bin 1 decreases, less water slag falls onto the dewatering screen 5, which means the feed rate of the dewatering screen 5 is small. Thus, by adjusting the position of the dewatering screen 5, the feed rate of the dewatering screen 5 can be controlled, which means the feed rate of the vibrating dewatering screen 2 can be controlled, so as to avoid the problems of poor dewatering effect due to excessive feed rate of the vibrating dewatering screen 2 and low dewatering efficiency due to insufficient feed rate of the vibrating dewatering screen 2.

[0031] In some embodiments of this application, the guide box 4 is connected to two synchronously telescopic hydraulic cylinders 7, and the hydraulic cylinders 7 are installed at the lower part of the slag bin 1. Specifically, a mounting base is fixed to the bottom of the hydraulic cylinder 7, and the mounting base is fixedly connected to the lower outer wall of the slag bin 1. A connecting plate I 8 is fixed to the upper part of one end of the guide box 4, and a connecting plate II 9 is fixed to the upper part of the other end of the guide box 4. The upper ends of the connecting plate I 8 and the upper ends of the connecting plate II 9 are located on the same plane. The free end of one hydraulic cylinder 7 is fixedly connected to the middle position of the connecting plate I 8, and the free end of the other hydraulic cylinder 7 is fixedly connected to the middle position of the connecting plate II 9, so that the guide box 4 can move up and down after the two hydraulic cylinders 7 telescopically extend and retract.

[0032] In this embodiment, a hydraulic station is also included, which is connected to two hydraulic cylinders 7. The hydraulic station controls the two hydraulic cylinders 7 to extend and retract synchronously. The hydraulic station and the method by which the hydraulic station controls the synchronous extension and retraction of the two hydraulic cylinders 7 are existing technologies and will not be described in detail here.

[0033] When in use, the two hydraulic cylinders 7 extend synchronously, causing the guide box 4 to move downwards; the two hydraulic cylinders 7 retract synchronously, causing the guide box 4 to move upwards.

[0034] In some embodiments of this application, a plurality of guide members I10 distributed along the width direction of the dewatering mesh plate 5 are installed on the upper part of the lower part of the dewatering mesh plate 5. The guide members I10 have a V-shaped plate structure and the open end of the guide members I10 faces the lower part of the dewatering mesh plate 5.

[0035] There is a gap between two adjacent guide components I10, and a guide component II11 is fixed to the upper end of the dewatering screen plate 5 at an angle above the two adjacent guide components I10. The guide component II11 has the same structure as the guide component I10.

[0036] When in use, as the water sludge falls onto the dewatering screen 5 and moves along the screen 5, it is first initially dispersed by the guide component II 11, and then further dispersed by the guide component I 10. This allows the water sludge to fall onto the vibrating dewatering screen 2 from multiple different positions, meaning the water sludge can fall evenly onto the screen 2. After the screen 2 vibrates, the water sludge is evenly dispersed on the screen 2, thereby improving the dewatering effect of the screen 2.

[0037] In some embodiments of this application, a material-pushing rod 12 extending into the water slag bin 1 is fixed to the upper end of the dewatering screen plate 5. Specifically, the material-pushing rod 12 includes a rod body with a plurality of evenly distributed inclined rods on the rod body, and the upper inclined ends of the inclined rods are fixedly connected to the rod body.

[0038] In this embodiment, when the dewatering screen plate 5 closes the outlet of the slag bin 1 and then reopens the outlet, the material-pushing rod 12 moves downward with the dewatering screen plate 5. As the material-pushing rod 12 moves, it moves the slag at the outlet of the slag bin 1, thus preventing blockage at the outlet when it is reopened. Furthermore, if blockage occurs during the discharge process, the hydraulic cylinder 7 moves the guide bin up and down, which means the material-pushing rod 12 moves up and down. This up-and-down movement of the material-pushing rod 12 quickly clears the blockage at the outlet of the slag bin 1.

[0039] In some embodiments of this application, the vibrating dewatering screen 2 includes a screen box 201, a dewatering screen 202 is installed inside the screen box 201, a vibrator 203 is installed at the upper end of the screen box 201, and the screen box 201 is connected to a spring assembly 204.

[0040] The lower part of the sieve box 201 has a bucket-shaped structure, which facilitates the collection of water separated by the dewatering screen 202. The lower end of the sieve box 201 has a drain outlet 206 located above the water collection tank 3.

[0041] In this embodiment, the vibrator 203 and the spring assembly 204 are both existing technologies and will not be described in detail.

[0042] When in use, start the vibrator 203. Under the action of the spring assembly 204, the screen box 201 vibrates. The screen box 201 drives the dewatering screen 202 to vibrate. After the screen vibrates, the water residue on the dewatering screen 202 is dewatered. The water separated by the dewatering screen 202 falls to the bottom of the screen box 201 and flows into the water collection tank 3 from the drain outlet 206.

[0043] 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; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A blast furnace slag treatment device, comprising a slag bin (1), characterized in that: Below the slag bin (1) is a vibrating dewatering screen (2), and below the vibrating dewatering screen (2) is a water collection tank (3), which collects the water separated by the vibrating dewatering screen (2). Below the discharge port of the slag bin (1) is a guide box (4) that can move up and down. Inside the guide box (4) are fixed dewatering screens (5) that are inclined and used to feed material to the vibrating dewatering screen (2). The lower part of the guide box (4) is connected to a water supply pipe (6) that extends to the top of the water collection tank (3). After the feed box (4) moves upward, the dewatering mesh plate (5) can block the discharge port of the slag bin (1).

2. The blast furnace slag treatment device according to claim 1, characterized in that: The feed box (4) is connected to two synchronously telescopic hydraulic cylinders (7), and the hydraulic cylinders (7) are installed at the lower part of the slag bin (1).

3. The blast furnace slag treatment device according to claim 1, characterized in that: The upper part of the lower part of the dewatering mesh plate (5) is equipped with a plurality of guide components I (10) distributed along the width direction of the dewatering mesh plate (5). The guide component I (10) is a V-shaped plate structure, and the open end of the guide component I (10) faces the lower part of the dewatering mesh plate (5). There is a gap between two adjacent guide components I (10), and a guide component II (11) fixed on the upper end of the dewatering mesh plate (5) is provided diagonally above the two adjacent guide components I (10). The guide component II (11) has the same structure as the guide component I (10).

4. The blast furnace slag treatment device according to claim 1, characterized in that: The upper end of the dewatering mesh plate (5) is fixed with a material-pulling rod (12) that extends into the slag bin (1).

5. The blast furnace slag treatment device according to claim 1, characterized in that: The vibrating dewatering screen (2) includes a screen box (201), a dewatering screen (202) is provided inside the screen box (201), a vibrator (203) is installed at the upper end of the screen box (201), and the screen box (201) is connected to a frame (205) through a spring assembly (204). The lower part of the sieve box (201) has a bucket-shaped structure, and the lower end of the sieve box (201) has a drain outlet (206) located above the water collection tank (3).

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