CN212293628U - Water slag treatment device for blast furnace sedimentation tank - Google Patents

Water slag treatment device for blast furnace sedimentation tank Download PDF

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Publication number
CN212293628U
CN212293628U CN202022054036.1U CN202022054036U CN212293628U CN 212293628 U CN212293628 U CN 212293628U CN 202022054036 U CN202022054036 U CN 202022054036U CN 212293628 U CN212293628 U CN 212293628U
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water
slag
tank
sedimentation tank
fluidization
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熊佐恒
欧阳文华
邵新敏
崔鸿根
刘俊良
周敏
刘富平
王加文
曾祥泉
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Xinyu Iron and Steel Co Ltd
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Xinyu Iron and Steel Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies

Abstract

The utility model discloses a blast furnace sedimentation tank grain slag processing apparatus is provided with the fluidization groove by the sedimentation tank, the fluidization groove is both ends confined V-arrangement groove or U-shaped groove, is provided with foraminiferous injection water pipe in bottom and side, and the injection water pipe passes the terminal surface and the water supply pipe connection in fluidization groove, and the grout outlet in fluidization groove passes through the entry linkage of sediment stuff pump, pipeline and pressure filter, and the slag notch and the band conveyer butt joint of pressure filter, the delivery port of pressure filter passes through the pipeline and is connected with the well that absorbs water. The utility model discloses a set up fluidization groove, sediment stuff pump, pipeline, pressure filter, band conveyer, make the sediment grain slag fluidization of fishing for, after sediment stuff pump delivery, pressure filter press-filtration, mud cake band transport, the link of outward transport with forklift, car after having cancelled the sedimentation tank salvage sediment grain slag, avoid place, road surface secondary pollution, saved and cleaned place, the freight to simple structure, the energy consumption is low, easy operation, it is effectual to deposit the grain slag treatment.

Description

Water slag treatment device for blast furnace sedimentation tank
Technical Field
The utility model relates to a grain slag processing technology field especially relates to a blast furnace sedimentation tank grain slag processing apparatus.
Background
When the blast furnace is tapped, the slag-iron mixture is separated from the slag skimmer to form slag, and then the slag flows out of the slag runner. The slag treatment mainly adopts a hydraulic slag flushing mode, and granulated slag is formed after water quenching of the slag and is used as a cement raw material or a building material. Along with the technological progress of blast furnace iron-making, at present, the iron works adopt the Mingtei method water slag treatment technology for a plurality of times, and the technology has the advantages of small occupied area, compact structure, reasonable overall layout, cyclic utilization of water resources, less pollution and the like. The operating principle of the water slag treatment technology of the Minte method is as follows: high-temperature slag is quenched by water through a spraying hole of a punching box to be punched into a water-slag mixture, the water-slag mixture flows into a stirring cage pool through a water-slag ditch, a stirring cage machine is arranged in the stirring cage pool at an inclination angle of 20 degrees, a helical blade conveys the water slag at the bottom of the stirring cage pool upwards along with the rotation of a helical conveying mechanism, water flows back downwards by virtue of gravity, so that the slag is separated from the water, the water slag is dehydrated into dry slag, the dry slag is conveyed to a head funnel, and then the dry slag falls into a belt conveyor from the funnel for external transportation and sale; the flushing slag water is filtered by a filter, flows into a sedimentation tank to precipitate fine slag to form clean water, enters a water absorption well for storage, and a flushing slag pump pumps water from the water absorption well for the flushing tank to circularly flush slag.
The slag flushing water is filtered by a filter with meshes of 0.80-2.0 mm, and a large amount of fine particle slag still passes through the meshes, so that the sediment in the sedimentation tank is inevitably accumulated more and more in the past due to the large circulating water amount of the slag flushing water, and the effective volume of the sedimentation tank is influenced. In addition, the grain slag is easy to harden, especially fine grain slag and slag wool, which are easy to be bonded into lumps, deposited and hardened, and difficult to salvage for a long time. At present, personnel are arranged to salvage the slag by a grab bucket on a traveling crane every day and grab the slag into a small storage yard which is transported by a forklift and an automobile, the fine slag in the field is scattered, and the operation environment is poor. In the transfer process, as the grab bucket cannot salvage and filter water completely, water slag inevitably falls on a road, so that road surface pollution, dust raising and difficulty in cleaning are caused. With the increasing environmental protection requirements of the state on the iron and steel industry, higher requirements are put forward on the dust treatment of iron works, and the method must be changed.
Disclosure of Invention
To the problem that exists, the utility model discloses a through introducing fluidization groove, sediment stuff pump, pressure filter, band conveyer, with current facility combination, avoid the water sediment to transport outward with forklift, car, improve the field work environment, provide a simple structure, the energy consumption is low, and the treatment effect is good, avoids water sediment secondary pollution's blast furnace sedimentation tank water sediment processing apparatus.
In order to achieve the above purpose, the technical scheme of the utility model is that: a blast furnace sedimentation tank grain slag processing device comprises a stirring cage tank, a filter, a water tank, a sedimentation tank, a grab bucket, a fluidization tank, a pipeline, a slag slurry pump, a filter press, a belt conveyor, a water suction well, a slag flushing pump, a flushing tank, a granulating tower and a grain slag ditch, wherein the filter is arranged behind an overflow port of the stirring cage tank, a water outlet below the filter is connected with the sedimentation tank through the water tank, the grab bucket is arranged on a traveling crane above the sedimentation tank, the water suction well is connected with the flushing tank through the slag flushing pump and the pipeline, a spray orifice plate of the flushing tank is butted with the granulating tower, the granulating tower is connected with the stirring cage tank through the grain slag ditch, the blast furnace sedimentation tank grain slag processing device is characterized in that the fluidization tank is arranged beside the sedimentation tank, the fluidization tank is a V-shaped groove or a U-shaped groove with two closed ends, the bottom and the side surfaces are provided with perforated spray water pipes, the spray water pipes penetrate through the end surfaces of the fluidization tank and are connected with, The pipeline is connected with the inlet of the filter press, the slag outlet of the filter press is in butt joint with the belt conveyor, and the water outlet of the filter press is connected with the water suction well through the pipeline.
Preferably, the terminal closed surface of the spray water pipe is provided with at least three spray holes.
Preferably, the bottom spraying water pipe is provided with at least three rows of spray holes along the length direction of the pipe body, the spray holes face upwards and are distributed at intervals along the arc surface of the pipe body in a fan-shaped mode.
Preferably, the bottom spray water pipe is arranged along the horizontal direction at an inclination angle of 1-3 degrees.
In order to prevent the barriers from blocking the slurry outlet and prevent the slurry from flowing smoothly, a screen is arranged in the fluidization groove.
Furthermore, the mesh of the screen is 30 mm-50 mm.
In order to prevent the corrosion of the screen and prolong the service life, the screen is made of stainless steel materials.
For the convenience of observation and operation, a safety channel is arranged on the outer bracket of the fluidization groove.
The use method of the water slag treatment device of the blast furnace sedimentation tank comprises the following steps:
s1, filling water in the fluidization tank: opening a valve on a water supply pipeline, and continuously supplying water into the V-shaped or U-shaped fluidization groove through the spraying water pipes arranged at the bottom and the side surface, wherein the water supply pressure is 0.5 MPa-0.7 MPa;
s2, fluidizing and precipitating the water slag: grabbing the sediment grain slag at the bottom of the sedimentation tank by a grab bucket on a travelling crane above the sedimentation tank, putting the sediment grain slag into a fluidization groove, fluidizing, and mixing ratio of slag and water being 40-60: 100, respectively;
s3, starting a slurry pump: pumping the fluidized slag-water mixture to the inlet of a filter press through a pipeline;
s4, starting the filter press and the belt conveyer: the mud cake after filter pressing falls into a belt conveyor from a slag outlet of the filter press and is transported outside, and meanwhile, filter pressing water flows into the water absorption well through a pipeline.
Compared with the prior art, the utility model, beneficial effect is: the utility model discloses improve bright special method grain slag treatment facility, through setting up fluidization groove, sediment stuff pump, pipeline, pressure filter, band conveyer, make the sediment grain slag fluidization of fishing for, through sediment stuff pump delivery, behind the pressure filter-pressing, mud cake band conveyer, the return water recycles, cancelled the link of salvaging behind the sediment grain slag with forklift, car outward transportation, avoid the place, road surface secondary pollution, saved and cleaned the place, the freight, and simple structure, the energy consumption is low, easy operation, it is effectual to deposit the grain slag treatment.
Drawings
Fig. 1 is a schematic plan view of the present invention.
Fig. 2 is a left side view of the fluidization-tank configuration of fig. 1.
Fig. 3 is a right side view of the fluidization-tank configuration of fig. 2.
In the figure: 1. a stirring cage pool; 2. a filter; 201. a water falling port; 3. a water tank; 4. a sedimentation tank; 5. driving a vehicle; 501. a grab bucket; 6. a fluidization tank; 601. a water supply pipeline; 602. a valve; 603. a spray water pipe; 604. screening a screen; 605. spraying a hole; 7. a pipeline; 8. a slurry pump; 9. a filter press; 10. a belt conveyor; 11. a suction well; 12. a slag flushing pump; 13. punching a box; 1301. a spray orifice plate; 14. a granulation tower; 1401. slag; 15. a water slag ditch; 16. a cage stirring machine; 17. a funnel; 18. a support; 19. and (4) a safe channel.
Detailed Description
The present invention will be further explained with reference to the drawings and examples. Referring to fig. 1-3, a blast furnace sedimentation tank grain slag treatment device comprises a stirring cage tank 1, a filter 2, a water tank 3, a sedimentation tank 4, a grab bucket 501, a fluidization tank 6, a pipeline 7, a slag pump 8, a filter press 9, a belt conveyor 10, a water suction well 11, a slag flushing pump 12, a punching tank 13, a granulation tower 14 and a grain slag ditch 15, wherein the filter 2 is arranged behind an overflow port of the stirring cage tank 1, a water outlet under the filter 2 is connected with the sedimentation tank 4 through the water tank 3, the grab bucket 501 is arranged on a travelling crane 5 above the sedimentation tank 4, the water suction well 11 is connected with the punching tank 13 through the slag flushing pump 12 and the pipeline 7, a spray orifice plate 1301 of the punching tank 13 is butted with the granulation tower 14, the granulation tower 14 is connected with the stirring cage tank 1 through the grain slag ditch 15, and is characterized in that the fluidization tank 6 is arranged beside the sedimentation tank 4, the fluidization tank 6 is a V-shaped groove or U-shaped groove with two closed ends, a water spray pipe 603 with holes is arranged at the bottom and the side surface, the spraying water pipe 603 penetrates through the end face of the fluidization groove 6 to be connected with the water supply pipeline 601, the slurry outlet of the fluidization groove 6 is connected with the inlet of the filter press 9 through the slurry pump 8 and the pipeline 7, the slag outlet of the filter press 9 is in butt joint with the belt conveyor 10, and the water outlet of the filter press 9 is connected with the water suction well 11 through the pipeline 7. The closed end surface of the water jet pipe 603 is provided with at least three jet holes 605. The bottom spray water pipe 603 has at least three rows of spray holes 605 along the length direction of the pipe body, the spray holes 605 are upward and are distributed at intervals along the arc sector of the pipe body. The bottom spray water pipe 603 is arranged along the horizontal direction at an inclination angle of 1-3 degrees. A screen 604 is arranged in the fluidization groove 6. The mesh of the screen 604 is 30 mm-50 mm. The screen 604 is made of stainless steel. The outer support 18 of the fluidization groove 6 is provided with a safety channel 19.
The use method of the water slag treatment device of the blast furnace sedimentation tank comprises the following steps:
s1, filling water in the fluidization groove 6: opening a valve 602 on the water supply pipeline 601, and continuously supplying water into the V-shaped or U-shaped fluidization groove 6 through the spraying water pipes 603 arranged at the bottom and the side surface, wherein the water supply pressure is 0.5 MPa-0.7 MPa;
s2, fluidizing and precipitating the water slag: grabbing the precipitated water slag at the bottom of the sedimentation tank 4 by a grab bucket 501 on a traveling crane 5 above the sedimentation tank 4, putting the water slag into a fluidization groove 6, fluidizing, and mixing ratio of slag and water being 40-60: 100, respectively;
and S3, starting a slurry pump 8: pumping the fluidized slag-water mixture through a pipe 7 to the inlet of a filter press 9;
s4, starting the filter press 9 and the belt conveyor 10: the filter-pressed mud cake falls into a belt conveyor 10 from a slag outlet of the filter press 9 and is transported outwards, and simultaneously filter-pressing water flows into a water suction well 11 through a pipeline 7.
As shown in fig. 1, the minte process grain slag treatment facility is generally arranged in a stepped manner. A granulating tower 14 is arranged below a blast furnace slag channel, a spray hole plate 1301 of a punching box 13 is in butt joint with the granulating tower 14, spray holes on the spray hole plate 1301 face the direction from high-temperature slag 1401, when slag is discharged from a blast furnace, high-pressure water in the punching box 13 is sprayed out and is flushed with the high-temperature slag 1401 to carry out water quenching, a slag mixture is flushed, the slag mixture is flushed into a stirring cage pool 1 arranged at the middle height through a slag channel 15, the stirring cage pool 1 is of a concrete structure and is determined according to the volume and the slag flushing amount of the blast furnace, a slope surface with an inclination angle of 20 degrees is arranged at the bottom surface, a U-shaped groove is arranged upwards in the slope surface, a stirring cage 16 is arranged in the U-shaped groove, the stirring cage 16 is also arranged in the stirring cage pool 1 at an inclination angle of 20 degrees, so that the stirring cage 16 can pick up the water slag at the bottom, dehydrates the water slag into dry slag, and then. The stirring cage pool 1 is provided with an overflow port, the overflow port is formed by arranging an upper baffle plate and a lower baffle plate into a labyrinth type at intervals, the upper baffle plate blocks floating slag (foam slag) on the water surface, the lower baffle plate blocks settling slag, flushing water flows in from a lower port of the upper baffle plate and then flows into a drum type filter 2 from an upper port of the lower baffle plate, a filter screen with meshes of 0.80-2.0 mm is installed on the rolling surface of the drum type filter 2, large-particle slag is filtered, fine-particle slag passes through the meshes along with water and flows into a water falling port 201 on a concrete structure at the lower part of the drum type filter 2, the water falling port 201 forms a water outlet through a prefabricated L-shaped duct and is communicated with a water tank 3, and the water tank 3 is connected. The sedimentation tank 4 is arranged at the bottom, namely a sedimentation pit is dug on the ground, the water tank 3 is connected with the sedimentation tank 4 to form a slope, the filtered slag flushing water containing the fine granular slag flows down along the slope and flushes into the sedimentation tank 4 to precipitate the fine slag, and the clean water on the surface layer flows into the water suction well 11. A travelling crane track (not shown) extending to the upper part of the fluidization groove 6 beside the sedimentation tank 4 is arranged above the sedimentation tank 4, and a grab bucket 501 is arranged on the travelling crane 5 and used for grabbing the precipitated water slag at the bottom of the sedimentation tank 4 and throwing the precipitated water slag into the fluidization groove 6. The fluidization groove 6 adopts a V-shaped groove (detailed figure 3) or a U-shaped groove with two closed ends, the V-shaped groove or the U-shaped groove is fixed through a bracket 18, a spraying water pipe 603 is arranged in the fluidization groove, the spraying water pipe 603 penetrates through one end face of the fluidization groove 6 to be connected with a water supply pipeline 601, a valve 602 on the water supply pipeline 601 is opened, water is continuously supplied into the fluidization groove 6 through the spraying water pipe 603, and the water supply pressure is 0.5 MPa-0.7 MPa. The two side surfaces in the fluidization groove 6 are provided with perforated water injection pipes 603, the side water injection pipes 603 are drilled with spray holes 605 along the length direction of the pipe body, the spray holes 605 are downward, preferably three to five rows of spray holes 605, and the terminal closed surface is drilled with spray holes 605, preferably three to five spray holes 605 (see fig. 2 and 3 for details) so as to supply water for rapidly diluting the input precipitated fine slag. The bottom of the fluidization groove 6 is provided with a perforated spraying water pipe 603, the bottom spraying water pipe 603 is drilled with spraying holes 605 along the length direction of the pipe body, the spraying holes 605 face upwards, preferably three to five rows of spraying holes 605 are distributed at intervals along the arc surface of the pipe body in a fan-shaped manner, the terminal closed surface is drilled with spraying holes 605, preferably three to eight spraying holes 605 (detailed in figures 2 and 3) so as to facilitate the stirring of spraying water and fast fluidization and sedimentation of fine slag, and the slag-water mixing ratio is 40-60: 100. the other end surface of the fluidization groove 6 is provided with a slurry outlet, a pipeline 7 is welded on the slurry outlet, and then the slurry outlet is connected with a slurry pump 8 and is connected with an inlet of a filter press 9. The bottom spray water pipe 603 is arranged obliquely at an angle theta of 1-3 degrees along the horizontal direction (see figure 2 in detail) so that the slag-water mixture flows towards the slurry outlet. The slurry pump 8 is started and the fluidized slurry water mixture can be pumped through the pipe 7 to the inlet of the filter press 9. In order to prevent impurities from blocking the slurry outlet and prevent the slurry from flowing smoothly, a screen 604 with 30-50 mm mesh is arranged above the bottom spraying water pipe 603 in the fluidization groove 6 to block obstacles and keep the lower part flowing smoothly. The screen 604 is preferably made of a stainless steel material to improve the corrosion resistance of the screen 604. A belt conveyor 10 is arranged below the slag outlet of the filter press 9, so that the filter-pressed mud cakes fall onto the belt conveyor 10 from the slag outlet of the filter press 9 and are transported outside. The water outlet of the filter press 9 is connected with a suction well 11 through a pipeline 7, so that filter press water flows into the suction well 11 through the pipeline 7 for recycling. The water absorption well 11 is connected with the flushing box 13 through the flushing slag pump 12 and the pipeline 7, and the flushing slag pump 12 pumps water from the water absorption well 11 for the flushing box 13 to circularly flush slag. A safety channel 19 is mounted on the outer support 18 of the fluidising tank 6 for routine observation and operation (see figures 2, 3 for details).
Fig. 2 is a left side view of the structure of the fluidization water tank 6 of fig. 1, and fig. 2 shows that the fluidization water tank 6 is fixed by a bracket 18, a safety passage 19 is welded on the fluidization water tank, the upper surface and the bottom surface of the fluidization water tank are provided with spray water pipes 603 as seen from the sectional surface, the spray water pipes 603 are arranged obliquely at an angle of theta 1-3 degrees along the horizontal direction, and a screen 604 is covered on the upper surface of the spray water pipes 603. The spray water pipe 603 shown on the right side of fig. 2 and on the bottom side is connected to the water supply pipe 601 through the end face of the fluidization tank 6, and the water supply pipe 601 is provided with a valve 602. The left side of the figure 2 shows that a slurry outlet is welded with a pipeline 7 and then connected with a slurry pump 8.
Fig. 3 is a right side view of the structure of the fluidization groove 6 of fig. 2, and fig. 3 shows that the fluidization groove 6 is fixed by a bracket 18, a safety channel 19 is welded on the fluidization groove 6, a spray water pipe 603 is installed on the upper surface and the bottom surface of the fluidization groove as seen from a cutting surface, a screen 604 is covered on the upper surface of the bottom spray water pipe 603, three rows of spray holes 605 are drilled on the side spray water pipe 603 along the length direction of the pipe body, the spray holes 605 are downward, and three spray holes 605 are drilled on a terminal sealing surface. The bottom spray water pipe 603 is drilled with three rows of spray holes 605 along the length direction of the pipe body, the spray holes 605 are upward and are distributed at intervals along the arc surface of the pipe body in a fan shape, and eight spray holes 605 are drilled on the closed end surface.
Example 1: with the utility model discloses be applied to 2500m3The blast furnace is taken as an example to further explain the realization mode of the utility model.
As shown in FIGS. 1 to 3, at 2500m3 A granulating tower 14 is arranged below the blast furnace slag ditch, 60 high-pressure water spray holes are drilled in a spray hole plate 1301 on the punching box 13, and the punching box 13 and the spray hole plate 1301 are made of steel plates. When the blast furnace is used for slag discharging, high-pressure water in the punching box 13 is sprayed out and is flushed with high-temperature slag 1401 for water quenching to form a water-slag mixture, the water-slag mixture is flushed into the stirring cage pool 1 through the water-slag channel 15, the stirring cage pool 1 is of a concrete structure, the length multiplied by the width is 13000mm multiplied by 3500mm, and the deepest part is 3000 mm. The stirring cage machine 16 is arranged in the stirring cage pool 1 at an inclination angle of 20 degrees, the model is MTC2500JL produced by Beijing Mingtie New technology, Limited liability company, the outer diameter of the spiral is phi 2540mm, the pitch of the blades is 915mm, the rotating speed is 3-7 r/min, and the water slag processing capacity is 360-650 t/h. With the rotation of the cage stirring machine 16, the water slag at the bottom of the cage stirring pool 1 is conveyed upwards by the helical blades, the water flows back downwards by the gravity, the water slag is dehydrated into dry slag, the dry slag is conveyed to the head funnel 17, and then the dry slag falls into the belt conveyor 10 from the funnel 17 for outward transportation and sale. The height multiplied by width multiplied by depth of an overflow port of the stirring cage pool 1 is 800mm multiplied by 800mm, the upper baffle and the lower baffle of the overflow port are arranged into a labyrinth type at an interval of 300mm, the height multiplied by width of the upper baffle is 600mm multiplied by 800mm, the upper baffle is made of steel plates and blocks floating slag (foam slag) on the water surface, the height multiplied by width of the lower baffle is 400mm multiplied by 800mm, the lower baffle is made of concrete and blocks the sediment slag, flushing slag water flows in from a lower opening of the upper baffle and then flows in a drum type filter 2 arranged from an upper opening of the lower baffle, the model of the drum type filter 2 is MTC2500GL produced by Beijing Mington Technology Limited company, and the diameter of the drum type filter 2 isAnd m is selected. The rolling surface of the drum-type filter 2 is covered with a long-strip filter screen with mesh width multiplied by the length of 0.80mm multiplied by 2.0mm, large-particle slag is filtered, fine-particle slag passes through the mesh along with water and flows into a water falling port 201 on a concrete structure at the lower part of the drum-type filter 2, the fine-particle slag flows into a water tank 3 through a prefabricated L-shaped duct with the diameter of 1000mm, the height multiplied by the width of the water tank 3 is 1200mm multiplied by 1200mm, the water tank is made of concrete masonry, and the water tank 3 is connected with a sedimentation tank 4 open. The sedimentation tank 4 is arranged at the bottom, namely a concrete pit with the length, the width and the depth of 20000mm, 12000mm and 6000mm is dug on the ground, the water tank 3 and the sedimentation tank 4 are connected to form a slope, the filtered slag flushing water containing the fine granular slag flows down the slope and flushes into the sedimentation tank 4 to precipitate the fine slag, and the surface layer clean water flows into the water suction well 11 with the diameter of 5000mm and the depth of 10000 mm. A travelling crane track (not shown) extending to the upper part of the fluidization groove 6 beside the sedimentation tank 4 is arranged above the sedimentation tank 4, and a grab bucket 501 is arranged on the travelling crane 5 and used for grabbing the precipitated water slag at the bottom of the sedimentation tank 4 and throwing the precipitated water slag into the fluidization groove 6. The fluidization groove 6 adopts a V-shaped groove (detailed figure 3) with two closed ends, the V-shaped groove is made of a 12mm thick steel plate, the size of the opening length is 5000mm multiplied by 2500mm, the V-shaped groove is fixed through a six-number angle steel or a round steel bracket 18 with the diameter of 25mm, a steel structure safety channel 19 is installed on the bracket 18 so as to facilitate daily observation and operation, a spraying water pipe 603 is installed inside the V-shaped groove, the spraying water pipe 603 is made of a welded pipe or a seamless steel pipe, the spraying water pipe 603 penetrates through one end face of the fluidization groove 6 to be connected with a water supply pipeline 601 with the nominal diameter of DN100, a valve 602 on the water supply pipeline 601 is opened, water is continuously supplied into the fluidization groove 6 through the spraying water pipe 603, and. Two side surfaces in the fluidization groove 6 are provided with perforated water spraying pipes 603 with the nominal diameter DN30, four rows of spray holes 605 with the diameter of 3mm are drilled on the side water spraying pipes 603 along the length direction of the pipe body, the spray holes 605 are downward, and five spray holes 605 with the diameter of 3mm are drilled on the terminal closed surface, so that water can be supplied to quickly dilute the input precipitated fine slag. The bottom of the fluidization groove 6 is provided with a perforated water jet pipe 603 with the nominal diameter DN50, the bottom water jet pipe 603 is provided with four rows of spray holes 605 with the diameter of 5mm along the length direction of the pipe body, the spray holes 605 face upwards and are distributed at intervals along the arc surface of the pipe body in a fan-shaped manner, and the terminal closed surface is provided with eight spray holes 605 with the diameter of 5mm for spraying water to stir and quickly fluidize and precipitate fine slag so that the mixing ratio of slag and water is55-60: 100. the other end surface of the fluidization groove 6 is provided with a slurry outlet with the diameter of 200mm, the slurry outlet is welded with a pipeline 7 with the nominal diameter of DN200 and is connected with a slurry pump 8, the model of the slurry pump 8 is 200ZJG-I-B45 produced by Shijiazhu stone pump slurry pump company Limited, and the pump flow is 356m3H, the lift is 20.6m, the rotating speed is 980r/min, and the belt power is Y250M-6-37 KW. The pipe 7 is connected to a concentration tank of the belt filter press 9, and is connected to the inlet of the belt filter press 9 through the pipe 7. The belt filter press 9 is 4DYQN3500GL manufactured by Zhengzhou Sarsteds mechanical Co., Ltd617KW of the main machine, 55KW of complete equipment, 3500mm of width of filter belt, 4 mesh belts, 1 group of double-roller extrusion, and 110-150 m of mud treatment capacity3H, the speed of the filter belt is adjusted to be 2-15 m/min, and the yield of the filter cake is 30-45 m3And h, the water content of the filter cake is 17-35%. The polyacrylamide flocculant is added into the concentration tank to precipitate flocculated tailings, and the supernatant is discharged into the water absorption well 11, so that flocculate at the bottom of the tank is conveyed to the inlet of the belt filter press 9 through the pipeline 7, the filtering capacity of the belt filter press 9 can be reduced, and the operating cost is reduced. The bottom spray water pipe 603 is arranged obliquely along the horizontal direction at an angle theta of 1-3 degrees, in this embodiment at an angle of 2 degrees, so that the slag-water mixture flows rapidly towards the slurry outlet. The slurry pump 8 is started and the fluidized slag water mixture can be pumped through the pipe 7 to the concentration tank and further to the inlet of the belt filter press 9. In order to prevent impurities from blocking the slurry outlet and prevent the slurry from flowing smoothly, a screen 604 with 50mm square meshes is arranged above the bottom spray water pipe 603 in the fluidization groove 6 to block obstacles and keep the lower part of the fluidization groove smooth. The screen 604 is made of a stainless steel material to improve the corrosion resistance of the screen 604. And a belt conveyor 10 is arranged below the slag outlet of the belt filter press 9, so that the filter-pressed mud cakes fall onto the belt conveyor 10 from the slag outlet of the belt filter press 9 and are transported outwards, and the water content of the mud cakes is 18%. The water outlet of the belt filter press 9 is connected with a water suction well 11 through a pipeline 7 with the nominal diameter of DN100, so that filter press water flows into the water suction well 11 through the pipeline 7 for recycling. The water absorption well 11 is connected with the flushing box 13 through a flushing slag pump 12 and a pipeline 7 with the nominal diameter of DN100, and the flushing slag pump 12 pumps water from the water absorption well 11 for the flushing box 13 to circularly flush slag.
Example 2: book withUtility model is applied to 1050m3The blast furnace is taken as an example to further explain the realization mode of the utility model.
At 1050m, as shown in FIGS. 1-33 A granulating tower 14 is arranged below the blast furnace slag groove, 40 high-pressure water spray holes are drilled on a spray hole plate 1301 of a steel punching box 13, when the blast furnace is used for discharging slag, high-pressure water in the punching box 13 is sprayed out and is opposite-punched with high-temperature slag 1401 for water quenching to form a water-slag mixture, the water-slag mixture is flushed into a stirring cage pool 1 through a water-slag groove 15, the stirring cage pool 1 is of a concrete structure, the length multiplied by the width is 12000mm multiplied by 3200mm, and the deepest part is 2800 mm. The stirring cage machine 16 is arranged in the stirring cage pool 1 at an inclined angle of 20 degrees, and the model is MTC2500 JL. With the rotation of the cage stirring machine 16, the water slag at the bottom of the cage stirring pool 1 is conveyed upwards by the helical blades, the water flows back downwards by the gravity, the water slag is dehydrated into dry slag, the dry slag is conveyed to a head cement hopper 17, and then the dry slag falls into the belt conveyor 10 from the hopper 17 for outward transportation and sale. The height of an overflow port of the stirring cage pool 1 is multiplied by 0, the width of the overflow port is multiplied by 1, the depth of the overflow port is multiplied by 600mm multiplied by 2600mm multiplied by 3600mm, the interval between an upper baffle plate and a lower baffle plate of the overflow port is 300mm, the height of an upper baffle plate made of a steel plate is multiplied by 4, the width of the upper baffle plate is multiplied by 400mm, 5600mm, floating slag (foam slag) on the water surface is blocked, the height of a lower baffle plate made of concrete is multiplied by 6, the width of the lower baffle plate is multiplied by 300mm, 7600mm, the sediment slag is blocked, flushing water flows in from a lower port of the upper baffle plate and then flows in from an upper port of the lower baffle plate to form a drum type filter. The rolling surface of the drum-type filter 2 is covered with a long-strip filter screen with mesh width multiplied by the length of 0.80mm multiplied by 1.8mm, large-particle slag is filtered, fine-particle slag passes through the mesh along with water and flows into a water falling port 201 on a concrete structure at the lower part of the drum-type filter 2, the fine-particle slag flows into a water tank 3 through a prefabricated L-shaped duct with the diameter of 800mm, the height multiplied by the width of the water tank 3 made of concrete is 1000mm multiplied by 1000mm, and the water tank 3 is connected with a sedimentation tank 4 open channel. The sedimentation tank 4 is arranged at the bottom, namely a concrete pit with the length, the width and the depth of 18000mm, 10000mm and 5000mm is dug on the ground, the water tank 3 and the sedimentation tank 4 are connected to form a slope, the filtered slag flushing water containing fine granular slag flows down the slope and flushes into the sedimentation tank 4 to precipitate the fine slag, and the surface layer clean water flows into a water suction well 11 with the diameter of 4000mm and the depth of 9000 mm. A traveling rail extending to the upper part of the fluidization groove 6 beside the sedimentation tank 4 is arranged above the sedimentation tank 4And a grab bucket 501 is arranged on the travelling crane 5 and used for grabbing the precipitated water slag at the bottom of the sedimentation tank 4 and throwing the water slag into the fluidization groove 6. The fluidization groove 6 is a V-shaped groove (detailed in figure 3) with two closed ends, and is made of a 10mm thick steel plate, the opening length is 4500mm × 2200mm in width, the V-shaped groove is fixed through a five-angle steel bracket 18, a steel structure safety channel 19 is arranged on the bracket 18, so that daily observation and operation are convenient, a welded pipe spraying water pipe 603 is arranged in the fluidization groove, the spraying water pipe 603 penetrates through one end face of the fluidization groove 6 to be connected with a water supply pipeline 601 with the nominal diameter of DN100, a valve 602 on the water supply pipeline 601 is opened, water is continuously supplied into the fluidization groove 6 through the spraying water pipe 603, and the water supply pressure is 0.55 MPa. Two side surfaces in the fluidization groove 6 are provided with perforated water spraying pipes 603 with the nominal diameter DN25, three rows of spray holes 605 with the diameter of 2mm are drilled in the side water spraying pipes 603 along the length direction of the pipe body, the spray holes 605 are downward, and four spray holes 605 with the diameter of 2mm are drilled on the terminal closed surface, so that water can be supplied to quickly dilute the input precipitated fine slag. The bottom of the fluidization groove 6 is provided with a perforated water spraying pipe 603 with the nominal diameter of DN50, the bottom water spraying pipe 603 drills three rows of spray holes 605 with the diameter of 4mm along the length direction of the pipe body, the spray holes 605 face upwards and are distributed at intervals along the arc surface of the pipe body in a fan-shaped mode, and the terminal closed surface drills six spray holes 605 with the diameter of 4mm, so that the sprayed water is stirred, the fine slag is quickly fluidized and deposited, and the mixing ratio of the slag and the water is 45-55: 100. the other end surface of the fluidization groove 6 is provided with a slurry outlet with the diameter of 200mm, the slurry outlet is welded with a pipeline 7 with the nominal diameter of DN200 and is connected with a slurry pump 8, the model of the slurry pump 8 is 150ZJG-I-B45 produced by Shijiazhu stone pump slurry pump company Limited, and the pump flow is 247m3H, lift 26.3m, rotating speed 980r/min, and belt power Y250M-6-37 KW. The pipe 7 is connected with the inlet of a pulling plate membrane filter press 9. The belt filter press 9 model is an automatic plate-pulling diaphragm filter press X produced by Kunshan environmental protection machinery Co., LtdA MGZ1000/2000-40U, filtering area 1000m2The size of the filter plate is 2000mm multiplied by 2000mm, the thickness of the filter cake is 40mm, the volume of the filter chamber is 20000 liters, the number of the diaphragm plates is 70, the number of the box-type plates is 69, the power of the motor is 5.5KW, the complete equipment is 45KW, and the filter pressing is 0.8 MPa. The bottom jet water pipe 603 has an angle theta of 1-3 degrees in the horizontal direction, 1 degree in this embodiment, and inclinationThe slag-water mixture flows towards the slurry outlet rapidly. The slurry pump 8 is started and the fluidized slurry water mixture can be pumped through the pipe 7 to the inlet of the membrane filter press 9. In order to prevent impurities from blocking the slurry outlet and prevent the slurry from flowing smoothly, a screen 604 with 30mm square meshes is arranged above the bottom spray water pipe 603 in the fluidization groove 6 to block obstacles and keep the lower part of the fluidization groove smooth. The screen 604 is made of a stainless steel material to improve the corrosion resistance of the screen 604. And a belt conveyor 10 is arranged below the slag outlet of the belt filter press 9, so that the filter-pressed mud cakes fall onto the belt conveyor 10 from the slag outlet of the belt filter press 9 and are transported outwards, and the water content of the mud cakes is 21%. The water outlet of the belt filter press 9 is connected with a water suction well 11 through a pipeline 7 with the nominal diameter of DN100, so that filter press water flows into the water suction well 11 through the pipeline 7 for recycling. The water absorption well 11 is connected with the flushing box 13 through a flushing slag pump 12 and a pipeline 7 with the nominal diameter of DN100, and the flushing slag pump 12 pumps water from the water absorption well 11 for the flushing box 13 to circularly flush slag.
The filter press 9 comprises a belt filter press, a plate and frame filter press, a box filter press and a diaphragm filter press, and is a well-known public technology, sold in the market, and the structure and the working principle of the filter press are not repeated herein.

Claims (8)

1. A blast furnace sedimentation tank grain slag processing device comprises a stirring cage tank, a filter, a water tank, a sedimentation tank, a grab bucket, a fluidization tank, a pipeline, a slag slurry pump, a filter press, a belt conveyor, a water suction well, a slag flushing pump, a flushing tank, a granulating tower and a grain slag ditch, wherein the filter is arranged behind an overflow port of the stirring cage tank, a water outlet below the filter is connected with the sedimentation tank through the water tank, the grab bucket is arranged on a traveling crane above the sedimentation tank, the water suction well is connected with the flushing tank through the slag flushing pump and the pipeline, a spray orifice plate of the flushing tank is butted with the granulating tower, the granulating tower is connected with the stirring cage tank through the grain slag ditch, the blast furnace sedimentation tank grain slag processing device is characterized in that the fluidization tank is arranged beside the sedimentation tank, the fluidization tank is a V-shaped groove or a U-shaped groove with two closed ends, the bottom and the side surfaces are provided with perforated spray water pipes, the spray water pipes penetrate through the end surfaces of the fluidization tank and are connected with, The pipeline is connected with the inlet of the filter press, the slag outlet of the filter press is in butt joint with the belt conveyor, and the water outlet of the filter press is connected with the water suction well through the pipeline.
2. The granulated slag processing device of the blast furnace sedimentation tank as claimed in claim 1, wherein the terminal closed surface of the injection water pipe is provided with at least three injection holes.
3. The apparatus of claim 1, wherein the bottom-injection nozzles are arranged in at least three rows of upwardly-facing arcuate sectors along the length of the shaft.
4. The granulated slag processing device of the blast furnace sedimentation tank as claimed in claim 1, wherein the bottom jet water pipe is arranged at an inclination angle of 1 ° to 3 ° in a horizontal direction.
5. The blast furnace sedimentation tank granulated slag processing apparatus according to claim 1, wherein a screen is provided in the fluidization tank.
6. The granulated slag processing device of the blast furnace sedimentation tank as claimed in claim 5, wherein the mesh of the screen is 30mm to 50 mm.
7. The blast furnace sedimentation tank granulated slag processing apparatus according to claim 5 or 6, wherein the screen is made of stainless steel material.
8. The apparatus as claimed in claim 1, wherein the outer frame of the fluidization chamber is provided with a safety passage.
CN202022054036.1U 2020-09-18 2020-09-18 Water slag treatment device for blast furnace sedimentation tank Active CN212293628U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111996316A (en) * 2020-09-18 2020-11-27 新余钢铁股份有限公司 Water slag treatment device for blast furnace sedimentation tank and use method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111996316A (en) * 2020-09-18 2020-11-27 新余钢铁股份有限公司 Water slag treatment device for blast furnace sedimentation tank and use method thereof
CN111996316B (en) * 2020-09-18 2023-08-29 新余钢铁股份有限公司 Slag treatment device of blast furnace sedimentation tank and application method thereof

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