Iron slag water quenching device

Abstract

The utility model relates to a kind of iron slag water quenching device, it is related to the processing technical field of iron slag produced by blast furnace ironmaking, including water quenching pool and the water quenching chamber being set above water quenching pool and closed, one side of water quenching chamber is provided with the discharge assembly of sending molten iron slag into water quenching chamber, the top of water quenching chamber is provided with the exhaust pipe being communicated with the inner chamber of water quenching pool, multiple water distribution rings distributed along its height are provided in water quenching chamber, multiple nozzles distributed along its circumferential direction are provided on water distribution ring, nozzle is used to spray water mist towards water quenching chamber and form cooling water layer, discharge assembly includes the inlet pipe being obliquely arranged below cooling water layer and the discharge pipe being perpendicular to inlet pipe, inlet pipe includes the outer expansion section, the diameter reducing section and the inner contraction section distributed in sequence, the end of outer expansion section away from diameter reducing section extends into water quenching chamber and is towards cooling water layer, the end of inner contraction section away from diameter reducing section is communicated with gas source, diameter reducing section is communicated with discharge pipe, the utility model improves the cooling effect of furnace slag, while reducing water consumption.

Description

Technical Field

[0001] This utility model relates to the field of iron slag treatment technology produced by blast furnace ironmaking, specifically an iron slag water quenching device. Background Technology

[0002] In the process of boiler ironmaking, the molten iron slag produced is usually treated by open-air water quenching. This involves pouring the high-temperature molten iron slag into a water tank or using high-pressure water jets to subject it to extreme cooling, causing it to granulate and form blast furnace slag. However, during the above-mentioned water quenching process, the contact between the cooling water and the high-temperature iron slag generates a large amount of high-temperature steam. This steam is rich in harmful components such as sulfides and chlorides, which not only causes a large consumption of water resources but also causes significant pollution to the surrounding environment. In addition, the fine particulate matter carried in the steam, after settling, can easily cause corrosion damage to surrounding buildings, parked vehicles, and other facilities.

[0003] In the prior art, for example, patent application number 201822038213.X discloses a slag water quenching system that performs closed-loop water quenching of slag and effectively collects and discharges the quenching flue gas; patent application number 202210572202.8 discloses a blast furnace water-quenched slag steam treatment device that performs closed-loop water quenching of slag, with the generated steam collected under a closed cover and output to the slag pool through a steam filter pipe. However, both of these devices discharge the slag into the water below, and as the slag gradually accumulates at this location, the subsequent cooling effect of the slag is poor. Utility Model Content

[0004] To address the problem of poor cooling effect of slag discharged into the furnace in the later stage in the existing technology, this utility model provides an iron slag water quenching device, which improves the cooling effect of slag and reduces water consumption.

[0005] To achieve the above objectives, the specific solution adopted by this utility model is as follows: an iron slag water quenching device, comprising a water quenching pool and a water quenching chamber disposed above and enclosed by the water quenching pool, wherein the water quenching pool is provided with a plurality of conveying components for conveying iron slag to the outside of the water quenching pool, and a slag discharge component for sending molten iron slag into the water quenching chamber is provided on one side of the water quenching chamber, wherein an exhaust pipe communicating with the inner cavity of the water quenching pool is provided at the top of the water quenching chamber, wherein a plurality of water conveying rings distributed along their height are provided in the water quenching chamber, and a plurality of nozzles distributed along their circumference are provided on the water conveying rings, wherein the nozzles are used to spray water mist toward the water quenching chamber to form a cooling water layer, and the slag discharge component includes a slag inlet pipe inclinedly disposed below the cooling water layer and a slag discharge pipe perpendicular to the slag inlet pipe, wherein the slag inlet pipe includes an outwardly expanding section, a narrowing section and an inwardly narrowing section distributed in sequence, wherein the end of the outwardly expanding section opposite to the narrowing section extends into the water quenching chamber and toward the cooling water layer, wherein the end of the inwardly narrowing section opposite to the narrowing section is connected to an air source, and the narrowing section is connected to the slag discharge pipe.

[0006] As an optimized solution for the aforementioned iron slag water quenching device, the acute angle formed by the axial direction and the vertical direction of the slag inlet pipe is 45-60°.

[0007] As another optimized solution for the above-mentioned iron slag water quenching device: a horizontal plate is provided above the cooling water layer. The molten iron slag sprayed into the water quenching chamber from the slag inlet pipe is refined after colliding with the horizontal plate, and a water vapor channel is formed between the edge of the horizontal plate and the side wall of the water quenching chamber.

[0008] As another optimized solution for the above-mentioned iron slag water quenching device: a water inlet pipe extending along its height is provided on the outer wall of the water quenching tank, and all water conveying rings are connected to the water inlet pipe.

[0009] As another optimized solution for the above-mentioned iron slag water quenching device: the water inlet pipe is provided with multiple connecting pipes that correspond one-to-one with the water conveying ring. One end of the connecting pipe is connected to the water inlet pipe, and the other end of the connecting pipe passes through the side wall of the water quenching chamber and is connected to the water conveying ring.

[0010] As another optimized solution for the above-mentioned iron slag water quenching device: the top of the water quenching chamber is provided with multiple exhaust branch pipes, which are connected to the exhaust pipe.

[0011] As another optimized solution for the above-mentioned iron slag water quenching device: the top of the water quenching chamber is provided with a multi-layer water vapor interception net, and the water vapor interception net gradually decreases from the center to the edge.

[0012] As another optimized solution of the above-mentioned iron slag water quenching device: the conveying assembly includes a first conveying roller, a second conveying roller, and a conveyor belt sleeved on the first and second conveying rollers. The first conveying roller is located above the water quenching tank, and the second conveying roller is located below the water quenching chamber.

[0013] As another optimized solution for the above-mentioned iron slag water quenching device: baffles are fixedly installed on the conveyor belt along the length of the conveyor belt, and the width of the baffles is equal to the width of the conveyor belt, forming a receiving area for accommodating solid iron slag between two adjacent baffles.

[0014] As another optimized solution for the above-mentioned iron slag water quenching device: a through hole is opened at the center of the baffle, and a filter screen is fixedly installed in the through hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model provides an iron slag water quenching device. Gas enters the slag inlet pipe from one end of the inner constriction section, carries the iron slag through the constriction section and enters the outer expansion section, and is finally sprayed into the water quenching chamber. The sprayed iron slag rises at an angle and then falls freely. During this process, it can pass through the cooling water layer multiple times to achieve rapid cooling. Finally, it falls into the water quenching pool and is discharged in time by a conveying device to avoid the accumulation of iron slag and improve the cooling effect of the slag.

[0016] 2. In this utility model, the molten iron slag entering the water quenching chamber first rises at an incline and passes through the cooling water layer, colliding with the horizontal plate. The iron slag is refined into small droplets or small particles that fall freely. During the fall, it passes through the cooling water layer, which further improves the cooling effect of the molten slag.

[0017] 3. In this utility model, the conveyor belt is equipped with baffles. On the one hand, a receiving area for slag is formed between two adjacent baffles to prevent the slag from sliding down due to gravity during the process of the conveyor belt carrying the slag upward. On the other hand, during the process of the conveyor belt conveying the slag, the baffles can carry out the water located below the water quenching chamber and carry the water located outside the water quenching chamber into the water quenching chamber, thereby reducing the temperature of the water below the water quenching chamber and improving the cooling effect of the slag. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a schematic diagram of the baffle structure; Reference numerals: 1. Water quenching chamber; 101. Connecting rod; 102. Horizontal plate; 103. Exhaust pipe; 104. Exhaust branch pipe; 2. Water quenching pool; 3. Water vapor channel; 4. Slag discharge assembly; 401. Equal diameter section; 402. Inner narrowing section; 403. Narrowing section; 404. Outer widening section; 405. Slag discharge pipe; 5. Conveying assembly; 501. First conveying roller; 502. Baffle; 503. Second conveying roller; 504. Conveyor belt; 6. Water supply ring; 601. Nozzle; 602. Water inlet pipe; 7. Cooling water layer; 8. Water vapor interception net; 9. Filter screen. Detailed Implementation

[0019] The technical solution of this utility model will be further described in detail below with reference to specific embodiments. Parts not described or disclosed in detail in the following embodiments of this utility model should be understood as prior art known or should be known by those skilled in the art, such as the installation method of the first conveyor roller, the installation method of the second conveyor roller, and how to drive the conveyor belt to move.

[0020] Example 1 A water quenching device for iron slag includes a water quenching pool 2 and a closed water quenching chamber 1 located above the water quenching pool 2. The water quenching pool 2 is constructed of cement masonry. The water quenching chamber 1 is a closed workshop built along one side of the water quenching pool 2, covering half of the water quenching pool 2 and dividing the water quenching pool 2 into a water quenching zone and a heat dissipation zone. Figure 1As shown, the area below the water quenching chamber 1 is the water quenching zone, and the area to the left of the water quenching zone is the heat dissipation zone. The size of the water quenching pool 2 is designed based on the capacity of the blast furnace and the amount of slag produced. The area and height of the water quenching chamber 1, as well as the flow rate of the slag discharge assembly 4, are designed based on the amount of slag produced.

[0021] Multiple water-carrying rings 6 are arranged along their height within the water quenching chamber 1. These rings extend around and are fixed to the inner wall of the chamber 1. The number of water-carrying rings 6 can be 2-6; in this embodiment, there are 2. Multiple nozzles 601 are arranged circumferentially on each water-carrying ring 6. These nozzles spray water mist towards the water quenching chamber 1 to form a cooling water layer 7. An inlet pipe 602 extending along the height is arranged on the outer wall of the water quenching tank 2, and all the water-carrying rings 6 are connected to the inlet pipe 602. Specifically, multiple connecting pipes corresponding to the water-carrying rings 6 are arranged on the inlet pipe 602. One end of each connecting pipe is connected to the inlet pipe 602, and the other end passes through the side wall of the water quenching chamber 1 and connects to the water-carrying ring 6. Cooling water enters the inlet pipe 602 and is diverted through the connecting pipes to the corresponding water-carrying rings 6, ultimately being sprayed out through the nozzles 601 to form the cooling water layer 7.

[0022] The water quenching tank 2 is equipped with several conveying components 5 for transporting iron slag to the outside of the water quenching tank 2, such as... Figure 1 As shown, the conveying assembly 5 includes a first conveying roller 501, a second conveying roller 503, and a conveyor belt 504 sleeved on the first conveying roller 501 and the second conveying roller 503. The first conveying roller 501 is located above the water quenching tank 2, and the second conveying roller 503 is located below the water quenching chamber 1. The horizontal plane where the first conveying roller 501 is located is higher than the horizontal plane where the second conveying roller 503 is located, so that the conveyor belt 504 is set at an angle.

[0023] A slag discharge assembly 4 is provided on one side of the water quenching chamber 1 to feed molten iron slag into the water quenching chamber 1, such as... Figure 2As shown, the slag discharge assembly 4 includes a slag inlet pipe inclined below the cooling water layer 7 and a slag discharge pipe 405 perpendicular to the slag inlet pipe. The top end of the slag inlet pipe extends into the water quenching chamber 1, and the bottom end of the slag inlet pipe is located outside the water quenching chamber 1. The acute angle formed by the axial direction of the slag inlet pipe and the vertical direction is 45-60°. The slag inlet pipe includes an outwardly expanding section 404, a narrowing section 403, and an inwardly narrowing section 402 distributed sequentially. The inwardly narrowing section 402, the narrowing section 403, and the outwardly expanding section 404 are integrally connected. An equal-diameter section 401 is integrally connected to the end of the inwardly narrowing section 402 opposite to the narrowing section 403. The equal-diameter section 401 is connected to the air source. It should be noted that the diameter of the narrowing section 403 is equal to and smaller than the diameter of the equal-diameter section 401. The outer expansion section 404 extends into the water quenching chamber 1 and faces the cooling water layer 7 at one end away from the narrowing section 403. The inner narrowing section 402 is connected to a gas source at one end away from the narrowing section 403. The narrowing section 403 is connected to the slag discharge pipe 405. After entering the slag inlet pipe, the gas first passes through the inner narrowing section 402. As the diameter of the inner narrowing section 402 gradually decreases, the gas velocity gradually increases. When the gas enters the narrowing section 403, it carries the molten iron slag in the slag discharge pipe 405 into the outer expansion section 404 and is sprayed into the water quenching chamber 1. The sprayed molten iron slag rises at an angle and passes through the cooling water layer 7 for cooling. Then, due to its own gravity, it falls, passing through the cooling water layer 7 again during its descent, and finally enters the water quenching zone of the water quenching pool 2. That is, the sprayed molten iron slag repeatedly passes through the cooling water layer 7, which improves the cooling effect of the iron slag.

[0024] The top of the water quenching chamber 1 is provided with an exhaust pipe 103 that communicates with the inner cavity of the water quenching pool 2. The exhaust pipe 103 is located on the outer top wall of the water quenching chamber 1. The top of the water quenching chamber 1 is provided with multiple exhaust branch pipes 104, which are connected to the exhaust pipe 103. That is, one end of the exhaust branch pipe 104 extends into the water quenching chamber 1, and the other side of the exhaust branch pipe 104 is connected to the exhaust pipe 103. The exhaust branch pipe 104 is connected to the side wall of the exhaust pipe 103. One end of the exhaust pipe 103 is closed, and the other end is connected to a collection device. This collection device is existing technology and will not be described in detail here.

[0025] The above are the basic embodiments of this utility model. Further improvements, optimizations, and limitations can be made based on the above to obtain the following embodiments: Example 2 This embodiment is an improvement on Embodiment 1. Its main structure is the same as Embodiment 1, but the improvement lies in the following: a horizontal plate 102 is installed above the cooling water layer 7. The horizontal plate 102 is fixedly connected to the inner wall of the water quenching chamber 1. Specifically, a connecting rod 101 is fixedly connected to the top inner wall of the water quenching chamber 1, with the top end of the connecting rod 101 fixedly connected to the top wall of the water quenching chamber 1 and the bottom end of the connecting rod 101 fixedly connected to the upper surface of the horizontal plate 102. The horizontal plate 102 is located on the trajectory of the molten slag. The molten iron slag injected into the water quenching chamber 1 from the slag inlet pipe collides with the horizontal plate 102 and is refined into small droplets and particles. These droplets and particles fall through the cooling water layer 7 for further cooling and finally fall into the water quenching zone of the water quenching pool 2, improving the cooling effect. A water vapor channel 3 is formed between the edge of the horizontal plate 102 and the side wall of the water quenching chamber 1, ensuring that water vapor smoothly enters above the horizontal plate 102.

[0026] Example 3 This embodiment is an improvement on embodiment 1. Its main structure is the same as that of embodiment 1. The improvement is that: the top of the water quenching chamber 1 is provided with a multi-layer water vapor interception net 8. The multi-layer water vapor interception net 8 is stacked along the height direction of the water quenching chamber 1. The water vapor interception net 8 gradually decreases from the center to the edge. When water vapor passes through the water vapor interception net 8, the water is captured and condensed into water droplets. The water droplets flow along the water vapor interception net 8 to the side wall of the water quenching chamber 1 and flow down the side wall.

[0027] Example 4 This embodiment is an improvement on Embodiment 1. Its main structure is the same as Embodiment 1, but the improvement lies in the following: baffles 502 are fixedly installed on the conveyor belt 504, distributed along the length of the conveyor belt 504, and the width of the baffles 502 is equal to the width of the conveyor belt 504. A receiving area for accommodating solid iron slag is formed between two adjacent baffles 502. The iron slag falling into the water quenching tank 2 eventually sinks into the receiving area of ​​the conveyor belt 504, and the conveyor belt 504 carries the iron slag out of the receiving area. The baffles 502 not only prevent the iron slag from sliding down, but also carry water from the heat dissipation area into the water quenching area and water from the water extraction area into the heat dissipation area, reducing the temperature of the water in the water extraction area and further improving the cooling effect.

[0028] like Figure 3 As shown, a through hole is provided at the center of the baffle 502, and a filter screen 9 is fixedly installed in the through hole to reduce the resistance of the baffle 502 in the water quenching tank 2, thereby reducing the force at the connection between the baffle 502 and the conveyor belt 504 and preventing the connection between the baffle 502 and the conveyor belt 504 from breaking.

[0029] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A slag water quenching device, comprising a water quenching tank (2) and a closed water quenching chamber (1) disposed above the water quenching tank (2), wherein the water quenching tank (2) is provided with a plurality of conveying components (5) for conveying slag to the outside of the water quenching tank (2), and a slag discharge component (4) for feeding molten slag into the water quenching chamber (1) is provided on one side of the water quenching chamber (1), and an exhaust pipe (103) communicating with the inner cavity of the water quenching tank (2) is provided on the top of the water quenching chamber (1), characterized in that: The water quenching chamber (1) is provided with multiple water conveying rings (6) distributed along its height. Multiple nozzles (601) are provided on the water conveying rings (6) distributed along its circumference. The nozzles (601) are used to spray water mist toward the water quenching chamber (1) to form a cooling water layer (7). The slag discharge assembly (4) includes a slag inlet pipe inclinedly arranged below the cooling water layer (7) and a slag discharge pipe (405) perpendicular to the slag inlet pipe. The slag inlet pipe includes an outward expansion section (404), a narrowing section (403), and an inward narrowing section (402) distributed in sequence. The end of the outward expansion section (404) away from the narrowing section (403) extends into the water quenching chamber (1) and toward the cooling water layer (7). The end of the inward narrowing section (402) away from the narrowing section (403) is connected to an air source. The narrowing section (403) is connected to the slag discharge pipe (405).

2. The iron slag water quenching device as described in claim 1, characterized in that: The acute angle formed by the axial direction and the vertical direction of the slag inlet pipe is 45-60°.

3. The iron slag water quenching device as described in claim 1, characterized in that: A horizontal plate (102) is provided above the cooling water layer (7). Molten iron slag sprayed into the water quenching chamber (1) from the slag inlet pipe is refined after colliding with the horizontal plate (102). A water vapor channel (3) is formed between the edge of the horizontal plate (102) and the side wall of the water quenching chamber (1).

4. The iron slag water quenching device as described in claim 1, characterized in that: The water quenching tank (2) has an inlet pipe (602) extending along its height on its outer wall, and all the water conveying rings (6) are connected to the inlet pipe (602).

5. The iron slag water quenching device as described in claim 4, characterized in that: The water inlet pipe (602) is provided with multiple connecting pipes that correspond one-to-one with the water conveying ring (6). One end of the connecting pipe is connected to the water inlet pipe (602), and the other end of the connecting pipe passes through the side wall of the water quenching chamber (1) and is connected to the water conveying ring (6).

6. The iron slag water quenching device as described in claim 1, characterized in that: The top of the water quenching chamber (1) is provided with multiple exhaust branch pipes (104), which are connected to the exhaust pipe (103).

7. The iron slag water quenching device as described in claim 1, characterized in that: The top of the water quenching chamber (1) is provided with a multi-layer water vapor interception net (8), and the water vapor interception net (8) gradually decreases from the center to the edge.

8. The iron slag water quenching device as described in claim 1, characterized in that: The conveying assembly (5) includes a first conveying roller (501), a second conveying roller (503), and a conveyor belt (504) sleeved on the first conveying roller (501) and the second conveying roller (503). The first conveying roller (501) is located above the water quenching tank (2), and the second conveying roller (503) is located below the water quenching chamber (1).

9. The iron slag water quenching device as described in claim 8, characterized in that: The conveyor belt (504) is fixedly provided with baffles (502) distributed along the length of the conveyor belt (504), and the width of the baffles (502) is equal to the width of the conveyor belt (504). A receiving area for accommodating solid iron slag is formed between two adjacent baffles (502).

10. The iron slag water quenching device as described in claim 9, characterized in that: A through hole is provided at the center of the baffle (502), and a filter screen (9) is fixedly installed in the through hole.

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