Furnace water slag quenching device for blast furnace slag

Abstract

The utility model relates to the technical field of blast furnace slag treatment, in particular to a furnace water slag quenching device for blast furnace slag, which comprises a furnace water slag quenching device body, and the furnace water slag quenching device body comprises a slag runner, a flushing box, a water slag tank, a slag-water separation device and a slag flushing water circulation device. The slag runner is communicated with the punching box and is used for conveying blast furnace slag to the punching box; the punching box is provided with water spraying holes; the water slag tank is positioned below the punching box and is used for receiving a slag-water mixture subjected to water quenching; the input end of the slag-water separating device is communicated with the water slag tank, and the output end of the slag-water separating device is respectively communicated with the slag collecting device and the slag flushing water circulating device; and the output end of the slag flushing water circulating device is communicated with the flushing box, so that the slag flushing water is recycled, and by optimizing the overall structural design, many problems of a traditional blast furnace slag treatment device are effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace slag treatment technology, and in particular to a furnace water quenching device for blast furnace slag. Background Technology

[0002] During blast furnace ironmaking, a large amount of high-temperature slag is generated. If this slag is not treated in time, it will not only waste heat but may also have adverse effects on the surrounding environment and production equipment. Traditional slag treatment methods have many drawbacks, such as low processing efficiency, high energy consumption, serious water waste, and poor slag-water separation.

[0003] In traditional slag processing equipment, the smooth flow of molten slag during transport to the quenching zone is difficult to guarantee, easily leading to blockages and affecting the continuity of the entire processing flow. In the quenching stage, an improperly designed water spraying device results in uneven water spraying, preventing sufficient contact between the molten slag and water, leading to unsatisfactory quenching results and inconsistent slag size after water quenching, increasing the difficulty of subsequent processing.

[0004] In terms of slag-water separation, traditional equipment lacks effective separation structures and methods, making it difficult to quickly and thoroughly separate the slag-water mixture. This results in excessively high moisture content in the slag, which is not conducive to subsequent recycling. At the same time, impurities such as slag particles in the circulating water cannot be removed in time, which will affect the quality of the circulating water, reduce the slag flushing effect, and increase equipment wear.

[0005] Furthermore, traditional equipment is not efficient in its water resource utilization, with an incomplete circulating water system, resulting in a large amount of water being used only once and then discharged, causing serious waste of water resources. Moreover, the overall structure of the equipment is not optimized, and the coordination between components is poor, leading to low operating efficiency and high energy consumption for the entire blast furnace slag quenching device. Therefore, developing a high-efficiency, energy-saving, and environmentally friendly blast furnace slag quenching device is of significant practical importance. Utility Model Content

[0006] To address some of the problems existing in the prior art, this utility model provides a furnace water quenching device for blast furnace slag. This utility model effectively solves many problems of traditional blast furnace slag processing devices through optimized overall structural design. The molten slag trough is connected to the stamping box, allowing for smooth transport of blast furnace molten slag to the stamping box. Combined with a downward-sloping stamping plate equipped with wear-resistant nozzles, uniform water spraying for slag quenching is achieved. The lower part of the slag-water trough is cylindrical, facilitating the swirling of the slag-water mixture for further cooling, and the internal grid can trap large pieces of solid slag.

[0007] To achieve the above objectives, this utility model provides a furnace water quenching device for blast furnace slag, comprising a furnace water quenching device body, wherein the furnace water quenching device body includes a molten slag trough, a flushing box, a water-slag trough, a slag-water separation device, and a flushing water circulation device; the molten slag trough is connected to the flushing box and is used to transport blast furnace molten slag to the flushing box; the flushing box is provided with water spray holes; the water-slag trough is located below the flushing box and is used to receive the slag-water mixture after water quenching; the input end of the slag-water separation device is connected to the water-slag trough, and its output end is connected to the slag collection device and the flushing water circulation device respectively; the output end of the flushing water circulation device is connected to the flushing box to realize the recycling of flushing water.

[0008] As a further improvement of this utility model, in order to make the water spray more concentrated and uniformly sprayed onto the molten slag, increase the contact area between water and molten slag, improve the quenching speed and quality, and enable the molten slag to cool and break up more quickly, the stamping box is provided with a stamping plate, which is arranged at a downward angle and has wear-resistant nozzles.

[0009] As a further improvement of this utility model, in order to enable the slag-water mixture to be evenly distributed in the distributor, the slag-water separation device includes a distributor and a buffer tank; the distributor is provided with multiple drainage zones, and a buffer tank is provided below each drainage zone; the inner wall of the distributor is welded with a tortoise shell mesh and coated with a wear-resistant layer.

[0010] As a further improvement of this utility model, in order to enable the slag-water mixture to be separated in different drainage zones, improve the thoroughness of slag-water separation, and enable the slag and water to be separated more effectively, the drainage zone includes a primary drainage zone, a secondary drainage zone and a tertiary drainage zone, with each level of drainage zone forming a stepped, sloping arrangement.

[0011] As a further improvement of this utility model, in order to filter out impurities such as slag particles in the circulating water, ensure the quality of the circulating water, and improve the slag flushing effect, the slag flushing water circulation device includes a collection hopper, which is connected to the slag-water separation device. The collection hopper is equipped with a filter inside, and the collection hopper is also equipped with a circulation pump. The collection hopper is connected to the flushing box through the circulation pump.

[0012] As a further improvement of this utility model, in order to facilitate the slag-water mixture to swirl in the slag-water tank and prolong the residence time of the slag-water mixture, the lower part of the slag-water tank is cylindrical, so as to facilitate the slag-water mixture to swirl in the slag-water tank and undergo further water quenching and cooling; the slag-water tank is also provided with a grid with perforated holes to block large pieces of solid slag.

[0013] In operation, the high-temperature molten slag produced during blast furnace ironmaking first enters the slag trough. This slag trough, serving as a slag conveying channel, is connected to the stamping box, and its design ensures smooth flow of the slag into the stamping box. Within the slag trough, the slag moves forward along the channel due to its own fluidity and gravity, eventually entering the stamping box to prepare for subsequent water quenching.

[0014] Once the molten slag enters the stamping box, the water spray holes on the box begin to function. The stamping box is equipped with a downward-sloping stamping plate featuring wear-resistant nozzles, and the water spray holes are located on this plate. Through an external water supply system, water is sprayed from the spray holes at a specific pressure and flow rate, evenly onto the molten slag. Because the stamping plate is tilted downwards, the water spray effectively covers the molten slag surface, ensuring thorough contact between the slag and water. During the intense heat exchange between the high-temperature molten slag and water, the slag rapidly cools and breaks down, forming a slag-water mixture. This process not only achieves rapid cooling of the molten slag but also creates favorable conditions for subsequent slag-water separation.

[0015] After water quenching, the slag-water mixture falls from the stamping box into the slag-water trough located below. The lower part of the trough is designed in a cylindrical shape, which allows the slag-water mixture to swirl and flow within the trough, further extending the residence time of the mixture and facilitating more thorough water quenching and cooling of the slag. Simultaneously, the perforated grid inside the trough can trap large pieces of solid slag, preventing them from entering subsequent processing equipment and avoiding blockages.

[0016] After initial sedimentation in the sludge-sludge tank, the mixture enters the sludge-sludge separation device through the connection between the tank and the device. The separation device mainly consists of a distributor and a buffer tank. The distributor has multiple drainage zones, including primary, secondary, and tertiary drainage zones, arranged in a stepped, sloping pattern. Upon entering the distributor, the mixture begins to separate due to the drop in elevation and structural design of the different drainage zones. Water gradually flows into the buffer tank below under gravity, while the sludge remains in the distributor. The inner wall of the distributor is welded with a hexagonal mesh and coated with a wear-resistant layer, enhancing its wear resistance, reducing wear on the inner wall, and ensuring the stability and reliability of the sludge-sludge separation.

[0017] After being processed by the slag-water separation device, the slag is transported to the slag collection device through the slag discharge port on the side of the slag-water separation device for subsequent recycling. The separated flushing water enters the flushing water circulation device. The flushing water circulation device includes a collection hopper connected to the slag-water separation device. The collection hopper is equipped with a filter that can filter out slag particles and other impurities in the flushing water, ensuring the quality of the flushing water. The collection hopper is also equipped with a circulation pump, which provides power to transport the filtered flushing water back to the flushing tank through pipelines, realizing the recycling of the flushing water.

[0018] The beneficial effects of this utility model are as follows:

[0019] I. High-efficiency water quenching treatment

[0020] Uniform water spraying enhances slag quenching effect: The stamping plate on the stamping box is arranged at a downward angle and equipped with wear-resistant nozzles. This design allows the water to be sprayed more concentratedly and evenly onto the molten slag. Compared with traditional devices, this increases the contact area between water and molten slag, allowing the molten slag to exchange heat with the water more quickly and fully. This significantly improves the speed and quality of slag quenching, enabling the molten slag to cool rapidly and break into suitable particle sizes.

[0021] Cyclone cooling enhances the treatment effect: The lower part of the slag tank is cylindrical, allowing the slag-water mixture to swirl and flow within it. This unique design extends the residence time of the slag-water mixture, enabling the slag to undergo further water quenching and cooling, ensuring thorough cooling and improving the overall effectiveness of the water quenching process.

[0022] II. Excellent sludge-water separation performance

[0023] The stepped drainage system achieves stratified separation: the distributor of the slag-water separation device is equipped with multiple drainage zones, including primary, secondary, and tertiary drainage zones, forming a stepped, sloping arrangement. This structure allows the slag-water mixture to be stratified according to density and particle size within the distributor. Under the influence of gravity, the water flows sequentially through different drainage zones into the buffer tank below, while the slag remains in the distributor, achieving highly efficient separation of slag and water.

[0024] Wear-resistant design extends service life: The inner wall of the distributor is welded with a hexagonal mesh and coated with a wear-resistant layer. During the blast furnace slag treatment process, the slag-water mixture causes significant wear on the inner wall of the distributor. This wear-resistant design effectively reduces wear, extends the service life of the distributor, lowers equipment maintenance costs and replacement frequency, and ensures the long-term stable operation of the slag-water separation device.

[0025] III. Reliable recycling of flushing water

[0026] Filtration and purification ensure circulating water quality: The collection hopper of the slag flushing water circulation device is equipped with a filter that filters the collected slag flushing water, removing slag particles and other impurities. This ensures the quality of the circulating water, prevents impurities from affecting subsequent slag flushing processes, improves slag flushing efficiency, and also reduces wear and tear on the equipment caused by clogging.

[0027] A circulating pump provides stable power: The circulating pump, installed in conjunction with the collection hopper, provides stable power for the circulation of flushing water. Through the circulating pump, the filtered flushing water can be smoothly transported from the collection hopper to the flushing tank, realizing the recycling of the flushing water. This not only saves water resources and reduces production costs, but also helps maintain stable water temperature within the unit, improving the overall operating efficiency of the unit. Attached Figure Description

[0028] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings:

[0029] Figure 1 This is a structural diagram of the present invention.

[0030] Figure 2 This is a structural diagram of the side of the stamping box.

[0031] The components include: 1. Slag trench, 2. Stamping box, 3. Slag trough, 4. Slag-water separation device, 5. Slag flushing water circulation device, 6. Spray hole, 7. Stamping plate, 8. Wear-resistant nozzle, 9. Distributor, 10. Buffer tank, 11. Drainage area, 12. Primary drainage area, 13. Secondary drainage area, 14. Tertiary drainage area, 15. Collection hopper, 16. Filter, and 17. Circulation pump. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions in this application, the following description is provided in conjunction with the appendix. Figure 1-2 The present invention will be further described below. The following embodiments are only used to illustrate the technical solution of the present invention more clearly, and should not be used to limit the protection scope of the present invention.

[0033] like Figure 1-2 The illustrated blast furnace slag quenching device includes a blast furnace slag quenching device body, which comprises a slag trough 1, a flushing box 2, a slag water tank 3, a slag-water separation device 4, and a flushing water circulation device 5. The slag trough 1 is connected to the flushing box 2 and is used to transport blast furnace slag to the flushing box 2. The flushing box 2 is provided with water spray holes 6. The slag water tank 3 is located below the flushing box 2 and is used to receive the slag-water mixture after water quenching. The input end of the slag-water separation device 4 is connected to the slag water tank 3, and its output end is connected to the slag collection device and the flushing water circulation device 5, respectively. The output end of the flushing water circulation device 5 is connected to the flushing box 2 to realize the recycling of flushing water.

[0034] The stamping box 2 is provided with a stamping plate 7, which is arranged at a downward angle and has a wear-resistant nozzle 8.

[0035] The slag-water separation device 4 includes a distributor 9 and a buffer tank 10; the distributor 9 is provided with multiple drainage zones 11, and each drainage zone 11 is provided with a buffer tank 10 below it; the inner wall of the distributor 9 is welded with a tortoise shell mesh and coated with a wear-resistant layer.

[0036] The drainage zone 11 includes a primary drainage zone 12, a secondary drainage zone 13, and a tertiary drainage zone 14, with each level of drainage zone forming a stepped, sloping arrangement.

[0037] The slag flushing water circulation device 5 includes a collection hopper 15, which is connected to the slag-water separation device 4. A filter 16 is installed inside the collection hopper 15. The collection hopper 15 is also equipped with a circulation pump 17. The collection hopper 15 is connected to the flushing box 2 through the circulation pump 17.

[0038] The lower part of the water slag tank 3 is cylindrical to facilitate the slag-water mixture to swirl within the tank and undergo further water quenching and cooling. The water slag tank 3 is also equipped with a grid with perforated holes to trap large pieces of solid slag.

[0039] In operation, the high-temperature molten slag produced during blast furnace ironmaking first enters the slag groove 1. The slag groove 1, serving as a slag conveying channel, is connected to the stamping box 2, and its design ensures that the slag can flow smoothly into the stamping box 2. Within the slag groove 1, the slag moves forward along the groove due to its own fluidity and gravity, eventually entering the stamping box 2, preparing for subsequent water quenching treatment.

[0040] When the molten slag enters the stamping box 2, the water spray holes 6 on the stamping box 2 begin to function. The stamping box 2 is equipped with a downwardly inclined stamping plate 7 with wear-resistant nozzles 8, and the water spray holes 6 are located on the stamping plate 7. Through an external water supply system, water is sprayed from the water spray holes 6 at a certain pressure and flow rate, evenly spraying onto the molten slag. Because the stamping plate 7 is inclined downwards, the water spray can better cover the surface of the molten slag, allowing the molten slag to fully contact the water. During the intense heat exchange between the high-temperature molten slag and water, the molten slag rapidly cools and breaks down, forming a slag-water mixture. This process not only achieves rapid cooling of the molten slag but also creates favorable conditions for subsequent slag-water separation.

[0041] The water-quenched slag-water mixture falls from the stamping box 2 into the water-slag tank 3 located below it. The lower part of the water-slag tank 3 is designed in a cylindrical shape, which allows the slag-water mixture to swirl and flow within the tank, further extending the residence time of the mixture and facilitating more thorough water quenching and cooling of the slag. Simultaneously, the perforated grid inside the water-slag tank 3 can trap large pieces of solid slag, preventing them from entering subsequent processing equipment and avoiding blockages.

[0042] After initial sedimentation in the sludge-sludge tank 3, the sludge-water mixture enters the sludge-water separation device 4 through the connection between the tank 3 and the device. The sludge-water separation device 4 mainly consists of a distributor 9 and a buffer tank 10. The distributor 9 has multiple drainage zones 11, including a primary drainage zone 12, a secondary drainage zone 13, and a tertiary drainage zone 14, arranged in a stepped, sloping pattern. After entering the distributor 9, the sludge-water mixture begins to separate due to the drop and structural design of the different drainage zones 11. Under gravity, the water gradually flows through the drainage zones 11 into the lower buffer tank 10, while the sludge remains in the distributor 9. The inner wall of the distributor 9 is welded with a hexagonal mesh and coated with a wear-resistant layer, which enhances the wear resistance of the distributor 9, reduces wear on the inner wall of the distributor 9 caused by the sludge-water mixture, and ensures the stability and reliability of the sludge-water separation.

[0043] After being processed by the slag-water separation device 4, the slag is transported to the slag collection device through the slag discharge port on the side of the slag-water separation device 4 for subsequent recycling. The separated flushing water enters the flushing water circulation device 5. The flushing water circulation device 5 includes a collection hopper 15, which is connected to the slag-water separation device 4. The collection hopper 15 is equipped with a filter 16, which can filter out impurities such as slag particles in the flushing water to ensure the quality of the flushing water. The collection hopper 15 is also equipped with a circulation pump 17, which provides power to transport the filtered flushing water back to the flushing tank 2 through pipelines, realizing the recycling of the flushing water.

[0044] This utility model is not limited to the above embodiments. Based on the technical solutions disclosed in this utility model, those skilled in the art can make some substitutions and modifications to some of the technical features without creative labor, and these substitutions and modifications are all within the protection scope of this utility model.

Claims

1. A granulation device for blast furnace slag using a granulation water, comprising a granulation device body for blast furnace slag using a granulation water, characterized by, The water quenching slag device body comprises a molten slag channel (1), a punching box (2), a water slag groove (3), a slag water separation device (4) and a punching slag water circulating device (5); the molten slag channel (1) is communicated with the punching box (2), and is used for conveying the blast furnace molten slag to the punching box (2); the punching box (2) is provided with a water injection hole (6); the water slag groove (3) is located below the punching box (2) and is used for receiving the slag water mixture after water quenching; the input end of the slag water separation device (4) is communicated with the water slag groove (3), and the output end thereof is respectively communicated with a slag collecting device and the punching slag water circulating device (5); the output end of the punching slag water circulating device (5) is communicated with the punching box (2), so that the punching slag water is recycled.

2. The granulation device for the granulation of blast furnace slag according to claim 1, characterized in that The punching box (2) is provided with a punching plate (7) which is arranged downwardly and is provided with wear-resistant nozzles (8).

3. The apparatus for quenching of slag of a blast furnace with water according to claim 1, characterized in that, The slag water separation device (4) comprises a distributor (9) and a buffer groove (10); a plurality of drainage areas (11) are arranged in the distributor (9), and the buffer groove (10) is arranged below each drainage area (11); a tortoise shell net is welded on the inner wall of the distributor (9) and is coated with a wear-resistant layer.

4. The slag granulation apparatus for a blast furnace slag according to claim 3, characterized by The drainage area (11) comprises a first-stage drainage area (12), a second-stage drainage area (13) and a third-stage drainage area (14), and each stage of the drainage area is arranged in a stepped slope shape.

5. The apparatus for quenching of slag of a blast furnace with a water bath according to claim 1, characterized in that, The punching slag water circulating device (5) comprises a collecting hopper (15), the collecting hopper (15) is connected with the slag water separation device (4), a filter (16) is arranged in the collecting hopper (15), a circulating pump (17) is further arranged in the collecting hopper (15), and the collecting hopper (15) is connected with the punching box (2) through the circulating pump (17).

6. The slag granulation apparatus for a blast furnace slag according to claim 1, wherein The lower part of the water slag groove (3) is in a cylindrical shape, so that the slag water mixture can rotate in the water slag groove (3) and be further water quenched and cooled; a grating with grid holes is further arranged in the water slag groove (3) and is used for stopping large solid slag.

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