Granulation tower of blast furnace

Abstract

The utility model discloses a blast furnace granulation tower which comprises a granulation tower body, the granulation tower body is communicated with a slag runner, a slag flushing water gap and a water slag runner, the slag runner and the water slag runner are located in two different directions of the non-opposite sides of the granulation tower body, a crescent slope is arranged on the inner bottom surface of the granulation tower body, and the crescent slope is arranged along the direction from a concave edge to a convex edge. The height of the crescent slope is gradually increased; the crescent slope is located on the central extension line of the slag runner and the central extension line of the water slag runner at the same time, and the concave edge of the crescent slope faces the middle position of the slag runner and the middle position of the water slag runner; and the bottom of the granulation tower body is also communicated with a bottom flushing water pipe. According to the granulating tower disclosed by the utility model, the granulating slag in the granulating tower body can be accurately steered through the crescent slope, so that the granulating slag can smoothly flow towards one side where the granulating slag channel is positioned, and meanwhile, the crescent slope is utilized for exciting water waves, and the bottom flushing water pipe is used for spraying water flow to drive and impact the slag to be discharged, so that the slag is prevented from being stacked in the granulating tower.

Description

Technical Field

[0001] This utility model relates to the technical field of blast furnace slag treatment systems, and in particular to a blast furnace granulation tower. Background Technology

[0002] In the iron and steel metallurgical industry, the efficient treatment of blast furnace slag is a key technological step to ensure stable blast furnace operation, reduce production costs, and improve resource recycling rates. Currently, bottom-filtration slag treatment systems are widely used in many steel enterprises due to their technological maturity and operational reliability. However, for some blast furnaces, due to plant planning limitations, their slag treatment systems face significant spatial constraints, making it difficult to meet the process requirements of traditional bottom-filtration slag treatment systems, which require a straight slag ditch design. This space constraint directly leads to reduced system operating efficiency, increased maintenance costs, and a significant increase in operational safety risks.

[0003] Taking our plant's blast furnace as an example, due to space constraints, the slag trough and flushing trough of the bottom-filtration slag treatment system connecting the granulation tower are arranged vertically, and the slag trough nozzles cannot be aligned in a straight line with the bottom outlet of the granulation tower. This layout leads to a series of critical problems: after molten slag enters the granulation tower and is granulated by high-pressure water jet, a large amount of incompletely discharged slag accumulates inside the tower because the flushing trough is located on the side. This not only reduces granulation efficiency but also causes frequent blockages in the granulation tower. To maintain system operation, furnace operators need to periodically enter the granulation tower for manual slag cleaning, which significantly increases labor intensity. In addition, as a confined space, the granulation tower presents various potential risks, such as confined space operation risks, the risk of toxic and harmful gas accumulation, and the risk of falling from slippery surfaces, seriously threatening the lives of operators. At the same time, slag accumulation inside the granulation tower can also lead to a deterioration in granulation effect, affecting the quality and recycling rate of the slag, thereby increasing production costs. In addition, if the accumulated slag is not cleaned up in time, it may damage the surrounding equipment, affect the stable operation of the entire blast furnace slag treatment system, and even pose a potential pollution risk to the environment.

[0004] In summary, the granulation tower with vertically arranged slag trough and flushing trough faces significant operational challenges under space-constrained conditions. There is an urgent need to develop a new technical solution to optimize slag flow dynamics, reduce manual intervention, improve operational safety and system stability, and ensure the efficient and safe operation of the blast furnace slag treatment system. Utility Model Content

[0005] The purpose of this invention is to provide a blast furnace granulation tower.

[0006] The technical solution to achieve the purpose of this utility model is: a blast furnace granulation tower, comprising a granulation tower body, wherein a slag ditch, a slag flushing nozzle, and a water slag ditch are connected on the granulation tower body, the slag ditch and the slag flushing nozzle are located on the same side of the granulation tower body, and the slag ditch and the water slag ditch are located at two different locations on two non-opposite sides of the granulation tower body, wherein the bottom surface of the inner surface of the granulation tower body is provided with a crescent slope, the crescent slope having a convex edge and a concave edge, wherein the convex edge is located on the inner wall of the granulation tower body and... The inner wall of the granulation tower body is fitted with the concave edge, which is located on the inner bottom surface of the granulation tower body and is fitted with the inner bottom surface of the granulation tower body; the height of the crescent slope gradually increases along the direction from the concave edge to the convex edge; the crescent slope is located on the center extension line of the slag ditch and the center extension line of the water slag ditch, and the concave edge of the crescent slope faces the middle position of the slag ditch and the water slag ditch; the bottom of the granulation tower body is also connected to a bottom flushing water pipe, which faces the water slag ditch.

[0007] Furthermore, the axis of the granulation tower body is simultaneously located on the centerline of the slag ditch and the centerline of the water slag ditch, and the centerlines of the slag ditch and the water slag ditch are perpendicular to each other. The slag ditch and the water slag ditch are located in two perpendicular directions to the granulation tower body, and the slag ditch and the water slag ditch are arranged perpendicularly.

[0008] This utility model relates to a blast furnace granulation tower. When the slag trough and the slag-water trough are located on different sides of the granulation tower body and are not opposite each other, a crescent-shaped slope is cleverly designed on the bottom surface of the granulation tower body. The special shape of the crescent-shaped slope can precisely deflect the slag-water trough within the granulation tower body, allowing it to flow smoothly towards the side where the slag-water trough is located, effectively avoiding the problem of large-scale slag deposition at the bottom of the granulation tower due to poor slag discharge. Simultaneously, the crescent-shaped slope can also generate water waves, using the surging force of the water waves to move the slag-water trough, thereby significantly improving the overall fluidity of the slag-water trough. Furthermore, a flushing water pipe is added to the bottom of the granulation tower body, facing the slag-water trough. The water jet injected through the flushing water pipe has a strong impact force, further enhancing the fluidity of the slag-water trough, especially strengthening the loosening and discharge efficiency of the slag-water trough at the bottom of the granulation tower body, ensuring that the slag-water trough at the bottom can be flushed into the slag-water trough and smoothly discharged from the granulation tower.

[0009] This utility model of a blast furnace granulation tower organically combines the crescent-shaped slope with the bottom flushing water pipe. From multiple key dimensions such as optimizing the water slag flow path, preventing slag deposition, and improving the overall fluidity of the water slag, it provides comprehensive protection for the timely discharge of slag within the granulation tower. It fundamentally and effectively prevents abnormal deposition of slag within the granulation tower, and significantly improves the operating efficiency and stability of the granulation tower. Attached Figure Description

[0010] Figure 1 This is a top view schematic diagram of the blast furnace granulation tower of this utility model;

[0011] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along line AA;

[0012] Figure 3 This is a three-dimensional structural diagram of a partially cut-off blast furnace granulation tower of this utility model;

[0013] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure along line BB. Detailed Implementation

[0014] The preferred embodiment of the blast furnace granulation tower of this utility model will be described in detail below with reference to the accompanying drawings:

[0015] like Figures 1 to 4 As shown, a blast furnace granulation tower includes a granulation tower body 1. The granulation tower body 1 is connected to a slag ditch 2, a slag flushing nozzle 3, and a water slag ditch 4. The slag ditch 2 and the slag flushing nozzle 3 are located on the same side of the granulation tower body 1. The slag ditch 2 and the water slag ditch 4 are located at two different positions on opposite sides of the granulation tower body 1. The axis P of the granulation tower body 1 is simultaneously located on the centerline of both the slag ditch 2 and the water slag ditch 4, and the centerlines of the slag ditch 2 and the water slag ditch 4 are perpendicular. The bottom surface of the granulation tower body 1 is provided with a crescent-shaped slope 5, which has a convex edge 51 and a concave edge 52. The convex edge 51 is located on the inner wall of the granulation tower body 1 and fits against the inner wall of the granulation tower body 1. The concave edge 52 is located on the inner bottom surface of the granulation tower body 1 and fits against the inner bottom surface of the granulation tower body 1. Along the direction from the concave edge 52 to the convex edge 51, the height H of the crescent slope 5 gradually increases. The crescent slope 5 is located on the center extension line L1 of the slag ditch 2 and the center extension line L2 of the water slag ditch 4. The concave edge 52 of the crescent slope 5 faces the middle position of the slag ditch 2 and the water slag ditch 4. The bottom of the granulation tower body 1 is also connected to a bottom flushing water pipe 6, which faces the water slag ditch 4.

[0016] This utility model relates to a blast furnace granulation tower for processing blast furnace slag. After molten slag is discharged from the blast furnace, it is rapidly cooled by high-pressure water flow in the granulation tower, breaking it into fine particles for subsequent recycling or safe disposal. The granulation tower body 1 serves as a container, providing operating space for the granulation process; the slag trough 2 is connected to the wall of the granulation tower body 1, serving as an inflow channel for the slag; the slag flushing inlet 3 is connected to the wall of the granulation tower body 1, providing high-pressure cooling water for the granulation process; and the water-slag trough 4 is connected to the bottom of the granulation tower body 1, serving as an outflow channel for the water and slag after granulation.

[0017] In this utility model, a blast furnace granulation tower has a slag trough 2 and a slag flushing nozzle 3 located on the same side of the granulation tower body 1, with the slag trough 2 directly above the slag flushing nozzle 3. The slag flushing nozzle 3, positioned on the same side as the slag trough 2, allows the water flow to directly and concentratedly impact the slag flow, reducing the slag's exposure time in the air. This prevents the slag temperature from dropping too quickly, leading to decreased fluidity, and also avoids uneven granulation or large slag residue due to deviations in the flushing angle.

[0018] This utility model relates to a blast furnace granulation tower. The slag trough 2 and the water slag trough 4 are located on different sides of the granulation tower body 1, and are not opposite each other. The axis P of the granulation tower body 1 is simultaneously located on the center lines of both the slag trough 2 and the water slag trough 4, and the center lines of the slag trough 2 and the water slag trough 4 are perpendicular. With this configuration, the layout of the blast furnace granulation tower is more concentrated, and installation can be achieved even with limited site length.

[0019] This utility model relates to a blast furnace granulation tower. The crescent-shaped slope 5 is located on the center extension line L1 of the slag trough 2 and the center extension line L2 of the water slag trough 4. The concave edge 52 of the crescent-shaped slope 5 faces the middle of the slag trough 2 and the water slag trough 4. This arrangement allows the water slag entering the granulation tower body 1 to directly impact the crescent-shaped slope 5. Under the obstruction and rotational action of the crescent-shaped slope 5, the water slag can be redirected and flow towards one side of the water slag trough 4. Simultaneously, the crescent-shaped slope 5 also serves to create water waves, which stir up the slag at the bottom of the granulation tower body 1, preventing excessive slag deposition at the bottom of the granulation tower body 1.

[0020] This utility model relates to a blast furnace granulation tower. During blast furnace slag granulation, slag is fed into the granulation tower body 1 through the slag trough 2. Simultaneously, high-pressure water jets are sprayed from the slag flushing nozzle 3 to rapidly cool the slag, causing it to break into fine particles. The granulated slag and water are discharged through the water-slag trough 4. During the above operation, the water and slag entering the granulation tower body 1 impact the crescent-shaped slope 5. Under the obstruction of the crescent-shaped slope 5, the water flows in a rotating manner along the arc of the crescent-shaped slope 5, thus changing the direction of the water flow towards the side closer to the slag flushing nozzle 3. At the same time, the water and slag impacting the crescent-shaped slope 5 also create water waves, turning up the slag in the granulation tower body 1. The water and slag that have been turned and turned up are finally discharged through the water-slag trough 4. During discharge, high-pressure water is introduced into the bottom flushing pipe 6 to increase the fluidity of the bottom water and slag, impacting the slag at the bottom of the granulation tower body 1, so that the slag that easily settles at the bottom of the granulation tower body 1 is discharged in time.

[0021] This utility model relates to a blast furnace granulation tower. When the slag trough 2 and the water slag trough 4 are located on different sides of the granulation tower body 1 and are not opposite each other, a crescent-shaped slope 5 is cleverly arranged on the bottom surface of the granulation tower body 1. The special shape of the crescent-shaped slope 5 can precisely deflect the water slag within the granulation tower body 1, allowing it to flow smoothly towards the side where the water slag trough 4 is located, effectively avoiding the problem of large-scale slag deposition at the bottom of the granulation tower due to poor water slag discharge. Simultaneously, the crescent-shaped slope 5 can also generate water waves, using the surging force of the water waves to move the slag along with it, thereby significantly improving the overall fluidity of the water slag. Furthermore, a bottom flushing water pipe 6 is added to the bottom of the granulation tower body 1, facing the water slag trough 4. The water flow sprayed through the bottom flushing water pipe 6 has a strong impact force, which can further improve the fluidity of the water slag, especially enhancing the loosening and discharge efficiency of the slag at the bottom of the granulation tower body 1, ensuring that the slag at the bottom can be promptly flushed into the water slag trough 4 and smoothly discharged from the granulation tower.

[0022] This utility model of a blast furnace granulation tower organically combines the crescent slope 5 with the bottom flushing water pipe 6. From multiple key dimensions such as optimizing the water slag flow path, preventing slag deposition, and improving the overall fluidity of the water slag, it provides comprehensive protection for the timely discharge of slag in the granulation tower body 1. It fundamentally and effectively prevents abnormal deposition of slag in the granulation tower and significantly improves the operating efficiency and stability of the granulation tower.

[0023] For those skilled in the art to which this utility model pertains, several simple deductions or substitutions can be made without departing from the concept of this utility model, and all such deductions or substitutions should be considered to fall within the protection scope of this utility model.

Claims

1. A blast furnace granulation tower, comprising a granulation tower body, wherein a slag trough, a slag flushing nozzle, and a water-slag trough are connected to the granulation tower body, the slag trough and the slag flushing nozzle are located on the same side of the granulation tower body, and the slag trough and the water-slag trough are located at two different locations on two non-opposite sides of the granulation tower body, characterized in that: The bottom surface of the granulation tower body is provided with a crescent-shaped slope, which has a convex edge and a concave edge. The convex edge is located on the inner wall of the granulation tower body and fits against the inner wall, while the concave edge is located on the bottom surface of the granulation tower body and fits against the bottom surface. The height of the crescent-shaped slope gradually increases from the concave edge to the convex edge. The crescent-shaped slope is located on the extended center line of both the slag ditch and the water slag ditch, with the concave edge of the crescent-shaped slope facing the middle of the slag ditch and the water slag ditch. The bottom of the granulation tower body is also connected to a bottom flushing water pipe, which faces the water slag ditch.

2. The blast furnace granulation tower according to claim 1, characterized in that: The axis of the granulation tower body is located simultaneously on the center line of the slag ditch and the center line of the water slag ditch, and the center line of the slag ditch and the center line of the water slag ditch are perpendicular.

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