Smelting blast furnace slag water flushing device

Abstract

The utility model belongs to the technical field of blast furnace slag treatment, and particularly relates to a smelting blast furnace slag flushing device which comprises a water tank arranged below a rotary drum and used for collecting hot water obtained after water-slag separation and a water injection pipe arranged above the water tank and used for supplementing water to the water tank. One side, close to the water tank, of the water injection pipe is connected with a water guide pipe fixedly arranged at the upper half part of an inner cavity of the water tank, and a plurality of nozzles are uniformly distributed at one end, far away from the water injection pipe, of the water guide pipe and are obliquely arranged downwards. A scraping device is arranged at the top of the water tank and used for cleaning fine slag left on the outer side wall of the rotary drum, the probability that the fine slag enters the water tank is effectively reduced, a water guide pipe is arranged in the water tank, a plurality of nozzles are evenly distributed on the water guide pipe, and the nozzles are obliquely arranged on the side close to the lower portion of the water tank. Water can be effectively sprayed to the bottom of the water pool, water flow is stirred, deposition and hardening of fine slag in the water pool are avoided, and the utilization rate of the water pool and the stability of equipment are improved.

Description

Technical Field

[0001] This utility model belongs to the field of blast furnace slag treatment technology, specifically relating to a water flushing device for blast furnace slag. Background Technology

[0002] The blast furnace slag-water mixture is introduced into the rotary drum. During the drum's rotation, due to centrifugal force, heavier slag particles settle on the inner side of the drum, while lighter water flows out through the slag and mesh. As the drum continues to rotate, the slag particles deposited on the inner side are carried to the upper part of the drum and fall onto the output conveyor belt at the center of the drum by their own weight. The conveyor belt transports the slag out. Most of the water and slag are dewatered and lifted by the drum, then fall onto the folded belt inside the drum and are transported away. A small amount of extremely fine slag passes through the drum's filter screen and enters the hot water tank. In addition to affecting the normal use of the water tank, it may also cause equipment blockage and malfunction, requiring a lot of time and manpower for repair and maintenance, increasing the labor intensity of workers, and also greatly reducing the operation rate of the drum. In order to solve this problem, the existing blast furnace slag water flushing device usually adopts simple stirring or flushing methods, but these methods are often limited in effect and cannot effectively prevent the deposition and caking of fine slag. At the same time, these slags may be further compacted or form slag layers as the drum continues to rotate, making the cleaning of the drum difficult. Utility Model Content

[0003] To address the above problems, the purpose of this utility model is to provide a water flushing device for blast furnace slag, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a blast furnace slag water flushing device, comprising a water tank located below the rotating drum for collecting hot water after slag separation, and a water injection pipe located above the water tank for replenishing water to the water tank. The side of the water injection pipe near the water tank is connected to a water guide pipe fixedly installed in the upper half of the inner cavity of the water tank. Multiple nozzles are evenly distributed at the end of the water guide pipe away from the water injection pipe, and the nozzles are installed at an angle towards the side near the lower part of the water tank. Water is sprayed onto the bottom of the water tank through the nozzles to agitate the water flow, effectively preventing the deposition and caking of fine slag.

[0005] The beneficial effects of this utility model are as follows: A scraping device, including a fixing plate, a shovel, and a cleaning brush, is installed at the top of the water tank to clean the fine residue remaining on the outer wall of the rotating drum, effectively reducing the probability of fine residue entering the water tank. By installing a water guide pipe in the water tank and evenly distributing multiple nozzles on the water guide pipe, with the nozzles installed at an angle towards the lower part of the water tank, water can be effectively sprayed to the bottom of the water tank to agitate the water flow. This design avoids the deposition and caking of fine residue in the water tank, improving the utilization rate of the water tank and the stability of the equipment.

[0006] To reduce the likelihood of fine sediment settling and hardening in the pool:

[0007] As a further improvement to the above technical solution: the number of water pipes is at least one.

[0008] The beneficial effects of this improvement are as follows: When there is only one water guide pipe, the lower part of the pool is conical, and the water guide pipe is installed on one side of the pool, which can be the left or right side, i.e. the side with the wider length. The length of the water guide pipe is the same as the length of the pool, and the nozzle is installed in a direction parallel to the inner wall of the pool. Therefore, when the nozzle sprays water, the water column sprays sequentially along the side wall of the pool to the bottom of the pool, which can effectively agitate the water flow and reduce the probability of fine debris settling and caking in the pool.

[0009] To effectively prevent the sediment and compaction of fine particles in the pool:

[0010] As a further improvement to the above technical solution: there are two water guide pipes, which are symmetrically distributed on the inner walls of both sides of the pool, and the nozzles on the two water guide pipes are arranged in a cross pattern.

[0011] The beneficial effects of this improvement are as follows: when the number of water guide pipes is set to two, they are symmetrically distributed on both sides of the pool. The two guide pipes are connected by a connecting pipe, and the nozzles on the two water guide pipes are arranged in a cross pattern. This can reduce the number of nozzles installed and also allow the water in the pool to form a more complex water flow pattern, that is, it can generate stronger shear force and turbulence, thereby reducing the dead angle of the water jet and effectively avoiding the deposition and caking of fine sludge in the pool.

[0012] To effectively prevent the caking of fine slag:

[0013] As a further improvement to the above technical solution, it also includes a scraping device installed at the top of the water tank for cleaning the fine slag remaining on the outer wall of the drum. This device can reduce the amount of fine slag accumulating in the inner cavity of the water tank and, in conjunction with the nozzle, effectively prevent the caking of fine slag.

[0014] The beneficial effects of this improvement are as follows: The rotary drum water-slag separator mainly utilizes centrifugal force and gravity to achieve solid-liquid separation. During the separation process, after the slag-water mixture enters the drum, it is subjected to centrifugal force, and the solid particles will move towards the outer wall of the drum and settle. As the drum continues to rotate, these settled solid particles may be further compacted or form a slag layer. Some fine slag will pass through the drum and adhere to the outer wall of the drum. The slag particles deposited on the inner side of the drum are carried to the upper part of the drum and fall onto the output belt conveyor in the center of the drum by their own weight. The belt conveyor transports the slag out. By setting up a scraping device, when larger slag particles fall onto the belt conveyor at the top of the drum, the scraping device can scrape and clean the fine slag remaining on the drum, thereby reducing the amount of fine slag entering the water tank and reducing the probability of fine slag caking in the water tank.

[0015] In order to reduce the chance of fine debris entering the pool:

[0016] As a further improvement to the above technical solution: the scraping device includes a fixed plate fixedly connected to the top of the water tank, a shovel plate movably connected to the top of the fixed plate and used to scrape off the slag accumulated on the outer wall of the drum, and a cleaning brush set below the shovel plate and used to sweep away fine slag from the drum after the shovel plate has scraped off the slag.

[0017] The beneficial effects of this improvement are as follows: When the power source drives the drum to rotate, the shovel can remove the fine slag accumulated on the outer surface of the drum, and then the cleaning brush can clean the residual slag powder on the drum. With the cooperation of the shovel and the cleaning brush, the probability of fine slag entering the water tank can be reduced. The thickness of the shovel gradually decreases from the side close to the fixed plate to the side away from the fixed plate, and its cross-section is inclined and pointed, which can reduce the contact area between the shovel and the drum, thereby better removing the fine slag on the drum. The cleaning brush can be made of materials such as steel wire brush or silicon carbide brush, which can withstand the high temperature of the slag and has wear-resistant properties, extending the service life of the cleaning brush.

[0018] To improve the cleaning effect of the drum:

[0019] As a further improvement to the above technical solution: the number of the scraping devices is at least one set.

[0020] The beneficial effects of this improvement are as follows: the scraping device can be a single set, i.e., set on one side of the drum, or two sets, symmetrically set on both sides of the drum. The length of the shovel and the cleaning brush is the same as the length of the drum, which can improve the cleaning effect on the drum.

[0021] To extend the life of the scraper and cleaning brush:

[0022] As a further improvement to the above technical solution: a buffer groove is provided on the side of the fixed plate near the drum, and an elastic element for connecting the fixed plate and the end of the shovel plate is provided inside the buffer groove.

[0023] The beneficial effects of this improvement are as follows: In order to extend the service life of the shovel and the cleaning brush, when there are hard slag blocks on the drum, as the drum rotates, when the slag blocks come into contact with the shovel, they push the shovel to move away from the drum and squeeze the elastic element, which can be a spring. When the slag blocks leave the shovel, the spring's elasticity drives the shovel to return to its original position and fit against the outer surface of the drum.

[0024] To facilitate the collection of the fine residue shoveled off the drum:

[0025] As a further improvement to the above technical solution: a collection trough is provided on the side of the fixed plate away from the rotating drum, and a guide plate for guiding fine slag to the collection trough is provided on the side of the shovel away from the rotating drum and at the top of the fixed plate.

[0026] The beneficial effect of this improvement is that after the fine residue on the drum is scraped off by the shovel, it is guided along the guide plate to the collection tank for centralized collection. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a top view of the structure of this utility model;

[0029] Figure 3 This is a frontal cross-sectional view of the present invention.

[0030] Figure 4 This is a top view cross-sectional structural diagram of the present invention.

[0031] In the diagram: 1. Rotating drum; 2. Water tank; 3. Water injection pipe; 4. Water guide pipe; 5. Nozzle; 6. Fixing plate; 7. Shovel plate; 8. Cleaning brush; 9. Power source; 10. Buffer tank; 11. Elastic component; 12. Collection tank; 13. Guide plate; 14. Connecting pipe; 15. Circulation pump. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0033] This utility model relates to an existing blast furnace slag water flushing device, which mainly includes a water tank 2 located below the rotating drum 1 for collecting the hot water after slag-water separation, and a water injection pipe 3 located above the water tank 2 for replenishing the water tank 2. The blast furnace slag-water mixture is introduced into the rotating drum 1. During the rotation of the rotating drum 1, due to centrifugal force, the heavier slag particles are deposited on the inner side of the rotating drum 1, while the lighter water flows out of the rotating drum 1 through the slag and the mesh. As the rotating drum 1 continues to rotate, the slag particles deposited on the inner side of the rotating drum 1 are carried to the upper part of the rotating drum 1 and fall onto the output belt conveyor at the center of the rotating drum 1 by their own weight. The belt conveyor transports the slag out, and most of the water-slag mixture is removed. After being dehydrated and lifted by the rotary drum 1, the slag falls onto the folded belt inside the drum 1 and is transported away. A small amount of extremely fine slag passes through the filter screen of the rotary drum 1 and enters the hot water tank 2. At the same time, during the blast furnace slag treatment process in the rotary drum 1, the slag and the flushing water come into contact and generate high-temperature water vapor. Meanwhile, during the recycling process, the flushing water will experience a decrease in water volume due to evaporation, splashing, pipe leakage, and the slag carrying away some of the circulating water. In order to maintain the normal operation of the system and ensure the treatment efficiency, it is necessary to replenish an appropriate amount of water into the hot water tank 2. When the circulating pump 15 is started, water is replenished into the hot water tank 2 through the water injection pipe 3. The above is an introduction to the existing blast furnace slag water flushing device.

[0034] As can be seen from the above, the existing blast furnace slag water flushing device has the following defects when in use. During the separation process, a large amount of fine slag is generated from the blast furnace slag. This fine slag is prone to deposition and caking in the water tank 2. The hot water tank 2 is located directly below the dewatering drum 1. The slag cleaning space is small, the ambient temperature is high, the steam volume is large, the slag cleaning workload is large, and it is impossible to use lifting equipment. Once problems such as slag accumulation and blockage or caking occur in the hot water tank 2 during the production process, the space of the hot water tank 2 will be reduced, and the suction port of the recirculation pump may be partially or completely blocked. A lot of time and manpower are required for maintenance, which increases the workload of workers and increases their labor intensity. At the same time, it also greatly reduces the operating rate of the drum 1. The traditional device lacks an effective water flow agitation mechanism and cannot effectively prevent the deposition and caking of fine slag. Secondly, during the rotation of the drum 1, fine slag is prone to remain on its outer wall. This slag may be further compacted or form a slag layer as the drum 1 continues to rotate, making the cleaning of the drum 1 difficult. Based on the above problems, this utility model adopts the following improvement method to solve them.

[0035] like Figure 1-4As shown, a blast furnace slag water flushing device includes a water tank 2 located below a rotating drum 1 for collecting hot water after slag separation, and a water injection pipe 3 located above the water tank 2 for replenishing water to the water tank 2. A water guide pipe 4, fixedly installed in the upper half of the inner cavity of the water tank 2, is connected to the side of the water injection pipe 3 closest to the water tank 2. Multiple nozzles 5 are evenly distributed at the end of the water guide pipe 4 away from the water injection pipe 3, and the nozzles 5 are inclined towards the lower part of the water tank 2. Water is sprayed onto the bottom of the water tank 2 through the nozzles 5 to agitate the water flow, effectively preventing the deposition and caking of fine slag.

[0036] Furthermore, such as Figure 3-4 As shown, the number of water guide pipes 4 is at least one. When there is only one water guide pipe 4, the lower part of the water tank 2 is conical, and the water guide pipe 4 is installed on one side of the water tank 2, as shown. Figure 3 As shown, it can be the left or right side, that is, the side with a wider length, and the length of the water pipe 4 is the same as the length of the water tank 2. The installation direction of the nozzle 5 is parallel to the inner wall of the water tank 2. Therefore, when the nozzle 5 sprays water, the water column sprays sequentially along the side wall of the water tank 2 towards the bottom of the water tank 2, which can effectively agitate the water flow and reduce the probability of fine sludge settling and hardening in the water tank 2.

[0037] Furthermore, such as Figure 3-4 As shown, when the number of water pipes 4 is set to two, they are symmetrically distributed on both sides of the water tank 2. The two pipes are connected by a connecting pipe 14. The nozzles 5 on the two water pipes 4 are arranged in a cross manner, which can reduce the number of nozzles 5 installed and also enable the water in the water tank 2 to form a more complex water flow pattern, that is, to generate stronger shear force and turbulence, thereby reducing the dead angle of water jet and effectively avoiding the deposition and caking of fine sludge in the water tank 2.

[0038] Furthermore, such as Figure 1-3As shown, the scraping device includes a fixed plate 6 fixedly connected to the top of the water tank 2, a shovel 7 movably connected to the top of the fixed plate 6 for scraping the slag accumulated on the outer wall of the drum 1, and a cleaning brush 8 set below the shovel 7 for sweeping the fine slag from the drum 1 after the shovel 7 has scraped it. The drum 1 type water-slag separator mainly uses centrifugal force and gravity to achieve solid-liquid separation. During the separation process, after the slag-water mixture enters the drum 1, it is subjected to centrifugal force. Solid particles, including fine slag, move towards the outer wall of the drum 1 and deposit. As the power source 9 drives the drum 1 to continue rotating, these deposited solid particles may be further compacted or form a slag layer. Some fine slag will pass through the drum 1 and adhere to the outer wall of the drum 1. The slag particles deposited on the inner side of the drum 1 are carried to the upper part of the drum 1. The slag falls onto the output conveyor belt at the center of the drum 1 by its own weight, and is then transported out by the conveyor belt. By setting up a scraping device, when larger particles of slag fall onto the conveyor belt at the top of the drum 1, the scraper plate 7 can scrape off the fine slag accumulated on the outer surface of the drum 1. Subsequently, the cleaning brush 8 can clean the residual slag powder on the drum 1. With the cooperation of the scraper plate 7 and the cleaning brush 8, the probability of fine slag entering the water tank 2 can be reduced. The thickness of the scraper plate 7 gradually decreases from the side close to the fixed plate 6 to the side away from the fixed plate 6, and its cross-section is inclined and pointed, which can reduce the contact area between the scraper plate 7 and the drum 1, thereby better scraping off the fine slag on the drum 1. The cleaning brush 8 can be made of materials such as steel wire brush or silicon carbide brush, which can withstand the high temperature of the slag and has wear-resistant properties, extending the service life of the cleaning brush 8.

[0039] Furthermore, such as Figure 1-3 As shown, the scraping device can be one set, i.e., set on one side of the rotating drum 1, or two sets, symmetrically set on both sides of the rotating drum 1. The length of the shovel 7 and the cleaning brush 8 is the same as the length of the rotating drum 1, which can improve the cleaning effect of the rotating drum 1.

[0040] Furthermore, such as Figure 3 As shown, a buffer groove 10 is provided on the side of the fixed plate 6 near the rotating drum 1. An elastic element 11 is provided inside the buffer groove 10 to connect the fixed plate 6 and the end of the shovel plate 7. In order to extend the service life of the shovel plate 7 and the cleaning brush 8, when there are slag blocks with high hardness on the rotating drum 1, as the rotating drum 1 rotates, when the slag blocks come into contact with the shovel plate 7, they push the shovel plate 7 to move away from the rotating drum 1 and squeeze the elastic element 11. The elastic element 11 can be a spring. When the slag blocks rotate away from the shovel plate 7, under the elastic action of the spring, the shovel plate 7 is driven to return to its original position and fit against the outer surface of the rotating drum 1.

[0041] Furthermore, such as Figure 1-3As shown, a collection trough 12 is provided on the side of the fixed plate 6 away from the rotating drum 1, and a guide plate 13 is provided on the side of the shovel plate 7 away from the rotating drum 1 and located at the top of the fixed plate 6 to guide fine residue to the collection trough 12. When the fine residue on the rotating drum 1 is shoveled off by the shovel plate 7, it is guided along the guide plate 13 to the collection trough 12 for centralized collection.

[0042] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the protection scope of this utility model.

Claims

1. A blast furnace slag water flushing device, comprising a water tank (2) disposed below a rotating drum (1) for collecting hot water after slag separation, and a water injection pipe (3) disposed above the water tank (2) for replenishing water to the water tank (2), characterized in that: The water injection pipe (3) is connected to a water guide pipe (4) fixedly installed in the upper half of the inner cavity of the water tank (2) on the side near the water tank (2). Multiple nozzles (5) are evenly distributed at the end of the water guide pipe (4) away from the water injection pipe (3), and the nozzles (5) are installed at an angle towards the lower part of the water tank (2). Water is sprayed to the bottom of the water tank (2) through the nozzles (5) to agitate the water flow, effectively avoiding the deposition and caking of fine sludge.

2. The blast furnace slag water flushing device according to claim 1, characterized in that: The number of water pipes (4) is at least one.

3. The blast furnace slag water flushing device according to claim 2, characterized in that: There are two water pipes (4), which are symmetrically distributed on the inner walls of both sides of the pool (2). At this time, the nozzles (5) on the two water pipes (4) are arranged crosswise.

4. The blast furnace slag water flushing device according to claim 1, characterized in that: It also includes a scraping device installed at the top of the water tank (2) for cleaning the fine slag remaining on the outer wall of the drum (1), which can reduce the amount of fine slag accumulating in the inner cavity of the water tank (2) and, in conjunction with the nozzle (5), effectively prevent the caking of fine slag.

5. A blast furnace slag water flushing device according to claim 4, characterized in that: The scraping device includes a fixed plate (6) fixedly connected to the top of the water tank (2), a shovel plate (7) movably connected to the top of the fixed plate (6) and used to scrape off the slag accumulated on the outer wall of the drum (1), and a cleaning brush (8) set below the shovel plate (7) and used to sweep away fine slag from the drum (1) after the shovel plate (7) has scraped off the slag.

6. The blast furnace slag water flushing device according to claim 5, characterized in that: The number of the scraping devices is at least one set.

7. A blast furnace slag water flushing device according to claim 6, characterized in that: The fixed plate (6) has a buffer groove (10) on the side near the drum (1), and the buffer groove (10) is provided with an elastic element (11) for connecting the fixed plate (6) and the end of the shovel plate (7).

8. A blast furnace slag water flushing device according to claim 5, characterized in that: The fixed plate (6) is provided with a collection trough (12) on the side away from the drum (1), and the shovel plate (7) is provided with a guide plate (13) on the side away from the drum (1) and on the top of the fixed plate (6) for guiding fine slag to the collection trough (12).

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