Steel slag bottom water injection system

Abstract

The utility model discloses a steel slag bottom water injection system which comprises a slag tank used for containing steel slag, and a cavity is formed in the bottom of the slag tank. The drainage grate is used for blocking the cavity at the bottom of the slag ladle to prevent the contained steel slag from leaking out and enabling water to enter the slag ladle, and drainage holes are formed in the drainage grate; the slag braising water tank is used for placing a slag tank; and the slag cover system is used for putting the slag tank into the slag braising water tank when the slag cover system is opened, covering the slag tank after the slag tank is in place so as to spray the slag tank, and collecting steam and dust. The method has the beneficial effects that after slag is discharged from a converter or an electric furnace, the steel slag does not need to be poured into a hot braising pool for lower water fetching operation, the steel slag is directly hoisted to a designated position for operation and cooling, flying dust caused in the transferring process is avoided, dust collection operation is reduced, collection of wet dust is more convenient, efficiency is higher, and energy is saved. After bottom water injection is completed, secondary treatment of the steel slag is facilitated, and meanwhile the problem that steel billets on the pool wall in the slag braising pool deform due to uneven cold and hot heating is solved.

Description

Technical Field

[0001] This utility model relates to the field of steel slag treatment technology, and more specifically, to a bottom water injection system for steel slag. Background Technology

[0002] The bottom-injection water treatment method for steel slag, also known as the hot bottom-water slag treatment or reverse immersion method, involves injecting water into the bottom of the slag-slag-suppressing tank through an inlet device. The water vaporizes upon contact with the high-temperature steel slag within the tank, creating a fumigation environment. Water is continuously injected until it submerges the steel slag, at which point it boils, creating a boiling environment. The wastewater from the slag-suppressing tank is discharged through an outlet device. This method overcomes the problems of explosion risks, long slag-suppressing times, and unsatisfactory steel slag pulverization effects in existing top-injection slag-suppressing processes. Initially, the water turns into steam upon contact with the hot slag and passes through the gaps in the high-temperature steel slag, continuing to heat up. The high-temperature steam fumigates the slag layer, promoting rapid slag fragmentation. Later, the water level in the tank gradually submerges the slag layer from bottom to top, ensuring more thorough contact with the hot slag. The water boils under the influence of the hot slag, effectively boiling the steel slag throughout the entire slag-suppressing tank. This boiling process is thorough and complete, ensuring the full dissolution of free calcium oxide and free magnesium oxide contained in the steel slag.

[0003] This method requires an overhead crane to first pour the steel slag from the slag bin into the slag pit. However, the unorganized dust generated during the slag removal process by the loader is extremely severe and difficult to collect effectively. The existing water-filled slag curing pit is a modification of the original top-filled hot curing pit. The walls and bottom plate of the curing pit are all fixed with steel billets, which is not only complicated in terms of process, but also prone to uneven heating and deformation of the steel billets in the pit walls after prolonged use. The concrete behind the steel billets is also prone to failure due to heat, seriously affecting its service life. The modification and construction of steel slag hot curing pits are extremely complex.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to propose a bottom water injection system for steel slag.

[0006] To achieve the above objectives, this utility model provides a steel slag bottom water injection system, comprising:

[0007] A slag pot used to hold steel slag, with a cavity at the bottom.

[0008] The drain grate, which is used to block the cavity at the bottom of the slag pot to prevent the steel slag from leaking out and to allow water to enter the slag pot, matches the cavity at the bottom of the slag pot and has drain holes.

[0009] A slag-simmering water tank is used to hold slag pots and is matched with slag pots;

[0010] A slag cover system, matched with the slag tank, is used to place the slag tank into the slag water tank when it is opened, and to cover the slag tank after it is in place to spray it, as well as to collect steam and dust.

[0011] Preferably, the cavity at the bottom of the slag pot is a circular cavity with a diameter of 500-1000 mm.

[0012] Preferably, the cavity at the bottom of the slag pot is a rectangular cavity with a length of 500-1000 mm and a width of 500-1000 mm.

[0013] Furthermore, hooks are provided on the drainage grate.

[0014] Furthermore, the slag cover system includes:

[0015] The slag cover is matched with the slag pot and is installed on top of the slag pot.

[0016] Furthermore, the slag cover system also includes:

[0017] The winch drive system, located on one side of the slag-suppressing pool, includes a winch, a take-up and undo drum mounted on the winch, and a winch wire rope wound on the take-up and undo drum. One end of the winch wire rope is connected to the slag cover.

[0018] Furthermore, the slag cover system also includes a main support frame, which is located on one side of the slag simmering tank, and the slag cover is rotatably mounted on top of the main support frame;

[0019] The hoist drive system also includes a mounting base, which is mounted on the main support frame.

[0020] Furthermore, the slag cover system also includes:

[0021] The spraying system includes spray pipes installed on the slag cover and nozzles connected to the spray pipes.

[0022] Furthermore, the slag cover system also includes:

[0023] The dust collection system includes a dust collection pipe installed on the slag cover and a dust collection port connected to the dust collection pipe.

[0024] This utility model provides a bottom water injection system for steel slag, with the following beneficial effects:

[0025] Before slag curing, the drainage grate is first installed into the cavity at the bottom of the slag pot by hoisting to prevent the steel slag from leaking out. After the steel slag is loaded into the slag pot, a crane lowers the slag pot into the curing water tank. At this point, the hoisting drive system in the slag cover system causes the slag cover to close and stop with the top of the slag pot. Water is then injected into the curing water tank from the bottom. The water enters the interior of the slag pot through the gap between the drainage grate and the bottom of the slag pot, achieving bottom water curing. Simultaneously, the steam and dust generated during curing are collected through the dust suction port on the slag cover, and then... The collection system performs centralized processing. After the slag is smelted, the overhead crane lifts the slag pot to the designated location to dump the slag and drain the smelting pool. With this invention, after the steel slag is discharged from the converter or electric furnace, it does not need to be poured into the hot smelting pool for water injection. It can be directly lifted to the designated location for operation to cool the steel slag, avoiding dust generated during transportation, reducing dust collection operations, and making the collection of wet dust more convenient and efficient. After the bottom water injection is completed, it is more conducive to the secondary treatment of steel slag. At the same time, it solves the problem of deformation caused by uneven heating of steel billets in the pool wall of the smelting pool. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a steel slag bottom water injection system according to an embodiment of the present utility model;

[0028] Figure 2 This is a schematic diagram of the hoist drive system in a steel slag bottom water injection system according to an embodiment of the present utility model;

[0029] Figure 3 This is a schematic diagram of the assembly structure of the slag tank and drainage grate in a steel slag bottom water injection system according to an embodiment of the present utility model;

[0030] Figure 4 This is another structural schematic diagram of a steel slag bottom water injection system according to an embodiment of the present utility model;

[0031] Figure 5 This is another structural schematic diagram of a steel slag bottom water injection system according to an embodiment of the present utility model;

[0032] Figure 6 This is a schematic diagram of the structure of a slag-steaming water tank in a steel slag bottom water injection system according to an embodiment of the present utility model;

[0033] Figure 7This is a schematic diagram of the structure of a leak-proof component in a steel slag bottom water injection system according to an embodiment of the present utility model;

[0034] Figure 8 This is a schematic diagram of the structure of the drainage hole and the hook in a steel slag bottom water injection system according to an embodiment of the present utility model;

[0035] Figure 9 This is another structural schematic diagram of a drainage hole and a hook in a steel slag bottom water injection system according to an embodiment of the present utility model;

[0036] Figure 10 This is a schematic diagram of the structure of a steel slag bottom water injection system in use according to an embodiment of the present utility model;

[0037] Figure 11 This is a schematic diagram of the open-cover structure of a steel slag bottom water injection system according to an embodiment of the present utility model.

[0038] In the picture:

[0039] 1. Slag hopper; 2. Drainage grate; 3. Slag brine pool; 4. Slag cover system; 5. Main support frame; 6. Winch drive system; 7. Winch wire rope; 8. Water injection pipe; 9. Slag cover; 10. Mounting base; 11. Winch; 12. Wire reel; 22. Drain hole; 23. Hook; 24. Spray pipe; 25. Nozzle; 26. Dust suction pipe; 27. Dust suction port; 28. Dust suction hose. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Please see Figure 1-11 This utility model provides a steel slag bottom water injection system, comprising:

[0042] Slag pot 1 is used to hold steel slag, and the bottom of slag pot 1 has a cavity.

[0043] The drain grate 2 is used to block the cavity at the bottom of the slag pot 1 to prevent the steel slag from leaking out and to allow water to enter the interior of the slag pot 1. It matches the cavity at the bottom of the slag pot 1 and has a drain hole 22.

[0044] The slag-simmering water tank 3 is used to place the slag tank 1 and is matched with the slag tank 1;

[0045] A slag cover system 4, matched with the slag tank 1, is used to place the slag tank 1 into the slag water tank 3 when it is opened, and to cover the slag tank 1 to spray it after it is in place, as well as to collect steam and dust.

[0046] Specifically, the drainage grate 2 has the same shape as the cavity at the bottom of the slag pot 1, but is larger than the cavity. The drainage holes 22 on the drainage grate 2 are in the shape of a grid or a fence. The drainage grate 2 is a carbon steel drainage grate, a cast iron drainage grate, or a cast steel drainage grate. When in use, the drainage grate 2 is placed flat at the bottom of the slag pot 1 to block the cavity at the bottom of the slag pot 1 and prevent the steel slag that has been put in from leaking out. The slag simmering water tank 3 can be a carbon steel slag simmering water tank, and the space capacity should be large enough to fit the slag pot 1.

[0047] The specific usage method is as follows:

[0048] 1. Open the slag cover system 4, hoist the drainage grate 2 into the empty slag tank 1 to prevent the steel slag from leaking out, and send it to the slag loading position;

[0049] 2. When the steel slag is full, the slag cover system 4 covers the slag pot 1 and the slag pot 1 is hoisted into the empty slag water tank 3;

[0050] 3. Water is injected into the empty slag-curing water tank 3. The water enters the slag tank 1 through the gap between the drainage grate 2 and the bottom of the slag tank 1, realizing bottom water injection for slag curing.

[0051] 4. The generated steam is collected by the slag cover system 4 and sent to the back-end dust removal system for processing. The back-end dust removal system is not the main innovation of this utility model. It can be implemented based on existing technology in this field, and will not be described in detail here.

[0052] 5. After the slag is cured, the slag cover system 4 is opened, and the overhead crane lifts the slag tank 1 to the designated location for slag dumping and subsequent processing.

[0053] 6. Drain the water from the slag-simmering water tank 3.

[0054] This utility model's bottom water injection system for steel slag eliminates the need to dump the slag into a hot quenching tank for water injection after it is discharged from the converter or electric furnace. Instead, the slag is directly hoisted to a designated location for cooling, avoiding dust generated during transport, reducing dust collection operations, and making the collection of wet dust more convenient and efficient. Furthermore, the bottom water injection system facilitates secondary treatment of the steel slag after the slag has been injected.

[0055] Preferably, the cavity at the bottom of the slag pot 1 is a circular cavity with a diameter of 500-1000 mm.

[0056] Preferably, the cavity at the bottom of the slag pot 1 is a rectangular cavity with a length of 500-1000 mm and a width of 500-1000 mm.

[0057] The bottom water injection system for steel slag of this utility model has a cavity size of 500-1000mm at the bottom of the slag tank 1. This ensures that when the slag-curing water tank 3 is filled with water, the water flow can quickly enter the interior of the slag tank 1 through the grid / fence-like channels of the drainage grate 2. The appropriate cavity size also allows the water flow to be evenly distributed to the bottom of the slag tank 1, forming a bottom water injection effect. If the size is too small, it may lead to insufficient water flow and reduced slag curing efficiency; if it is too large, it may weaken the structural strength of the bottom of the slag tank 1, resulting in weak load-bearing capacity, deformation after long-term use, and easy damage. This range can ensure both water flow efficiency and service life. In addition, the cavity size of 500-1000mm corresponds to a moderate capacity of the slag tank 1, and the steel slag pieces are uniform in size when dumping slag, which is convenient for subsequent secondary processing processes such as crushing and magnetic separation.

[0058] The drainage grate 2 is equipped with a hook 23. In use, a crane can be used to hook the hook 23 of the drainage grate 2, which improves convenience and work efficiency.

[0059] The slag cover system 4 may include:

[0060] Slag cover 9 is matched with slag pot 1 and is set on top of slag pot 1.

[0061] The slag cover system 4 may also include:

[0062] The winch drive system 6 is located on one side of the slag-suppressing water tank 3, including a winch 11 and a take-up and undo roller 12 on the winch 11, and a winch wire rope 7 wound on the take-up and undo roller 12. One end of the winch wire rope 7 is connected to the slag cover 9.

[0063] The winch drive system 6 may further include a pull rod, one end of which is connected to the winch wire rope 7, and the other end of which is connected to the slag cover 9. A rotating device is provided at the connection between the pull rod and the slag cover 9, so that the winch wire rope 7 pulls the pull rod, and the pull rod rotates, thereby driving the slag cover 9 to open with relatively little force. The rotating device may specifically be a bearing. Of course, the winch wire rope 7 may also be directly connected to the slag cover 9 to simplify the structure.

[0064] The slag cover system 4 may also include a main support frame 5, which is located on one side of the slag simmering tank 3, and the slag cover 9 is rotatably mounted on the top of the main support frame 5.

[0065] The hoist drive system 6 may also include a mounting base 10, which is mounted on the main support frame 5.

[0066] Specifically, the height of the main support frame 5 matches the height of the slag pot 1; the mounting base 10 is mounted on the main support frame 5 by anchor bolts, and a winch 11 is mounted on the mounting base 10; during operation, the take-up and undo roller 12 mounted on the winch 11 rotates to realize the take-up and undo work of the winch wire rope 7, thereby realizing the opening and closing of the slag cover 9. The slag cover 9 can be opened by lifting upwards and closed downwards by the winch 11. When the slag pot 1 comes over, the winch 11 first pulls the slag cover 9 to a position of about 90°, and then the slag pot 1 is placed in place. After the slag pot 1 is in place and filled with steel slag, the slag cover 9 is slowly lowered. After the slag cover 9 reaches a horizontal position, the winch is stopped, and the water spray valve on the water injection pipe 8 is opened to spray water. The steam and dust generated during the water spraying process are collected through the dust suction port on the slag cover 9, and then collected through the dust suction pipe to the dust removal system for centralized treatment.

[0067] The slag cover system 4 may also include:

[0068] The spraying system includes a spray pipe 24 disposed on the slag cover 9 and a nozzle 25 connected to the spray pipe 24.

[0069] Specifically, the spray pipe 24 can be connected to an external water pump (not shown in the figure) via a spray hose. The water pressure in the spray pipe is 0.3-0.5 MPa, and the nozzles are arranged in a rectangular pattern to achieve full coverage of the steel slag. The electric spray valve is installed on the main water supply pipe connected to the water pump, and the valve opening is controlled by the operator.

[0070] The slag cover system 4 may also include:

[0071] The dust collection system includes a dust suction pipe 26 installed on the slag cover 9 and dust suction ports 27 connected to the dust suction pipe 26. The number of dust suction ports is 6-9.

[0072] Specifically, the suction pipe 26 can be connected to an external suction device (not shown in the figure) via the suction hose 28.

[0073] The slag-simmering water tank 3 may include:

[0074] High-temperature resistant concrete matrix 13;

[0075] The alloy steel inner layer 14 is set inside the high-temperature resistant concrete matrix 13;

[0076] Leak-proof component 15 is installed at the connection between water injection pipe 8 and slag-simmering water tank 3. Leak-proof component 15 includes inner support steel sleeve 16. Both ends of inner support steel sleeve 16 are provided with sealing installation rings 17. Each sealing installation ring 17 is provided with a sealing rubber ring 18. Each sealing installation ring 17 is provided with an installation hole 19 that penetrates the sealing rubber ring 18. The two side walls of inner support steel sleeve 16 are respectively provided with inner anti-deformation rubber cylinder 20 and outer anti-deformation rubber cylinder 21.

[0077] Specifically, after the water injection pipe 8 passes through the water-proof component 15, the connection can be kept sealed even when the slag-curing water tank 3 expands and contracts due to heat, thus preventing the slag-curing water tank 3 from leaking.

[0078] The main advantages of the steel slag bottom water injection system described in this utility model are:

[0079] 1. After the steel slag is discharged from the converter or electric furnace process, it is no longer necessary to pour it from slag pot 1 into the hot quenching tank for bottom water filling. The operation can be carried out directly, making the process simpler and more convenient.

[0080] 2. The slag container has a smaller capacity, making it easier to collect wet dust and requiring less dust removal air volume.

[0081] 3. After the bottom water injection is completed, it is more conducive to the secondary treatment of steel slag.

[0082] 4. The hot braising container equipment has a simplified design, making it more convenient to load and unload slag.

[0083] 5. No steel billets are required on the inner side of the slag-simmering water tank. Ordinary concrete water tanks can be used, and there is no fear that the steel billets will deform due to heat.

[0084] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bottom water injection system for steel slag, characterized in that, include: A slag pot (1) for holding steel slag, the bottom of which has a cavity. The drain grate (2) is used to block the cavity at the bottom of the slag pot (1) to prevent the steel slag from leaking out and to allow water to enter the interior of the slag pot (1). It matches the cavity at the bottom of the slag pot (1) and has a drain hole (22). A slag-simmering water tank (3) is used to place the slag pot (1) and is matched with the slag pot (1); A slag cover system (4) is used to place the slag pot (1) into the slag water tank (3) when it is opened, and to cover the slag pot (1) after it is in place to spray the slag pot (1), as well as to collect steam and dust, and is matched with the slag pot (1).

2. The steel slag bottom water injection system according to claim 1, characterized in that, The cavity at the bottom of the slag pot (1) is a circular cavity with a diameter of 500-1000 mm.

3. The steel slag bottom water injection system according to claim 1, characterized in that, The cavity at the bottom of the slag tank (1) is a rectangular cavity with a length of 500-1000 mm and a width of 500-1000 mm.

4. The steel slag bottom water injection system according to claim 1, characterized in that, The drainage grate (2) is equipped with a hook (23).

5. A bottom water injection system for steel slag according to claim 1, characterized in that, The slag cover system (4) includes: The slag cover (9) is matched with the slag pot (1) and is set above the slag pot (1).

6. A bottom water injection system for steel slag according to claim 5, characterized in that, The slag cover system (4) also includes: The winch drive system (6) is located on one side of the slag simmering pool (3), including a winch (11) and a take-up and undo roller (12) on the winch (11), and a winch wire rope (7) wound on the take-up and undo roller (12). One end of the winch wire rope (7) is connected to the slag cover (9).

7. A bottom water injection system for steel slag according to claim 6, characterized in that, The slag cover system (4) also includes a main support frame (5), which is located on one side of the slag simmering tank (3), and the slag cover (9) is rotatably mounted on the top of the main support frame (5); The hoist drive system (6) also includes a mounting base (10), which is mounted on the main support frame (5).

8. A steel slag bottom water injection system according to claim 5, characterized in that, The slag cover system (4) also includes: The spraying system includes a spray pipe (24) installed on the slag cover (9) and a nozzle (25) connected to the spray pipe (24).

9. A bottom water injection system for steel slag according to claim 5, characterized in that, The slag cover system (4) also includes: The dust collection system includes a dust collection pipe (26) installed on the slag cover (9) and a dust collection port (27) connected to the dust collection pipe (26).

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