CN111996316B - Slag treatment device of blast furnace sedimentation tank and application method thereof - Google Patents
Slag treatment device of blast furnace sedimentation tank and application method thereof Download PDFInfo
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- CN111996316B CN111996316B CN202010985483.0A CN202010985483A CN111996316B CN 111996316 B CN111996316 B CN 111996316B CN 202010985483 A CN202010985483 A CN 202010985483A CN 111996316 B CN111996316 B CN 111996316B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/032—Separating slag from liquid, e.g. from water, after quenching
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
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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
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Abstract
The invention discloses a slag treatment device of a blast furnace sedimentation tank and a use method thereof, wherein a fluidization groove is arranged beside the sedimentation tank, the fluidization groove is a V-shaped groove or a U-shaped groove with two closed ends, the bottom and the side surfaces are provided with injection water pipes with holes, the injection water pipes penetrate through the end surfaces of the fluidization groove and are connected with a water supply pipeline, a slurry outlet of the fluidization groove is connected with an inlet of a filter press through a slurry pump and a pipeline, a slag outlet of the filter press is in butt joint with a belt conveyor, and a water outlet of the filter press is connected with a water absorbing well through a pipeline. According to the invention, the fluidization groove, the slurry pump, the pipeline, the filter press and the belt conveyor are arranged, so that the fished sediment water slag is fluidized, and after being conveyed by the slurry pump and filtered by the filter press, the mud cake is conveyed by the belt, the backwater is recycled, the link of using a forklift and an automobile to transport the sediment water slag after being salvaged by the sedimentation tank is eliminated, the secondary pollution of the field and the road surface is avoided, the cleaning field and the transportation cost are saved, the structure is simple, the energy consumption is low, the operation is easy, and the sediment water slag treatment effect is good.
Description
Technical Field
The invention relates to the technical field of water slag treatment, in particular to a water slag treatment device of a blast furnace sedimentation tank and a use method thereof.
Background
When the blast furnace is tapped, slag is separated from the skimmer by the slag-iron mixture and then flows out of the slag runner. The slag treatment mainly adopts a hydraulic slag flushing mode, and the slag forms granulated water slag after water quenching and is used as a cement raw material or a building material. With the progress of blast furnace iron making technology, at present, the iron works adopt the Ming and te method water slag treatment technology, 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 working principle of the Ming and te method water slag treatment technology is as follows: after high-temperature slag is quenched by water through spray holes of a punching box, the slag mixture is punched into a slag mixture, the slag mixture flows into a stirring cage pool through a slag trench, a stirring cage machine is installed in the stirring cage pool at an inclined angle of 20 degrees, along with the rotation of a spiral conveying mechanism, a spiral blade conveys the slag at the bottom of the stirring cage pool upwards, water flows back downwards by gravity, so that the slag is separated from the water, the slag is dehydrated into dry slag, the dry slag is conveyed to a head funnel, and the dry slag falls into a belt conveyor for outward transportation and sales through the funnel; the slag flushing water is filtered by a filter, flows into a sedimentation tank to sediment fine slag, becomes clean water, enters a water absorbing well to be stored, and a slag flushing pump pumps water from the water absorbing well for the circulating slag flushing of a flushing box.
The slag flushing water is filtered by a filter with meshes of 0.80-2.0 mm, a large amount of fine particle slag still passes through the meshes, and as the circulating water quantity of the slag flushing water is large, sediment in the sedimentation tank is necessarily accumulated more and more, so that the effective volume of the sedimentation tank is influenced. In addition, since the water slag is a substance which is easy to harden, especially fine slag and slag cotton are extremely easy to adhere and agglomerate, and sediment and harden after precipitation, so that the water slag is difficult to salvage for a long time. At present, people are arranged every day to salvage by grab buckets on travelling cranes, grab small storage yards, and are transported by forklift trucks and automobiles, fine slag is scattered on the yards, and the operation environment is poor. In the transportation process, as the grab bucket is not clean in salvaging and filtering, water slag can be inevitably scattered on a road, so that road surface pollution and dust emission are caused, and the cleaning is difficult. As the environmental requirements of the country on the steel industry are increasing, higher requirements are also put on dust treatment in iron works, and the method must be changed.
Disclosure of Invention
Aiming at the problems, the invention aims to provide the blast furnace sedimentation tank water slag treatment device which has the advantages of simple structure, low energy consumption, good treatment effect and capability of avoiding secondary pollution of water slag and a use method thereof, and aims to avoid the external transportation of water slag by forklift and automobile and improve the field operation environment by introducing a fluidization tank, a slurry pump, a filter press and a belt conveyor to be combined with the existing facilities.
In order to achieve the above purpose, the technical scheme of the invention is as follows: the utility model provides a blast furnace sedimentation tank grain slag processing apparatus, including stirring cage pond, a filter, the basin, the sedimentation tank, the grab bucket, the fluidization groove, the pipeline, the sediment stuff pump, the pressure filter, band conveyer, the suction well, the sediment stuff pump, the punching case, the granulation tower, the water slag ditch, be provided with the filter behind the overflow mouth of stirring cage pond, the delivery port under the filter passes through the basin and is connected with the sedimentation tank, be provided with the grab bucket on the driving above the sedimentation tank, the suction well passes through the sediment stuff pump, the pipeline is connected with the punching case, the orifice plate of punching case is docked with the granulation tower, the granulation tower passes through the water slag ditch and is connected with stirring cage pond, its characterized in that is provided with the fluidization groove at the sedimentation tank side, the fluidization groove is V-arrangement groove or the U-shaped groove that both ends are closed, be provided with foraminiferous water injection pipe in bottom and side, the water injection pipe passes the terminal surface and the water supply pipe connection of fluidization groove, the play thick liquid mouth of fluidization groove passes through the sediment stuff pump, the pipeline and the entry connection of pressure filter, the slag port of pressure filter is docked with band conveyer, the delivery port.
Preferably, the end closing surface of the injection water pipe is provided with at least three spray holes.
Preferably, the bottom injection water pipe is provided with at least three rows of spray holes along the length direction of the pipe body, the spray holes are upward, and the spray holes are distributed at intervals along the cambered surface sector of the pipe body.
Preferably, the bottom injection water pipe is arranged at an inclined angle of 1-3 degrees along the horizontal direction.
In order to prevent the blocking of the slurry outlet and the smooth slurry, a screen is arranged in the fluidization groove.
Further, the mesh opening of the screen is 30 mm-50 mm.
In order to prevent the screen from corroding and prolong the service life, the screen is made of stainless steel materials.
For the convenience of observation and operation, the outside support of fluidization groove is provided with the safety channel.
The application method of the slag treatment device of the blast furnace sedimentation tank comprises the following steps:
s1, filling water into a fluidization groove: starting a valve on a water supply pipeline, and continuously supplying water to a V-shaped or U-shaped fluidization groove through injection water pipes arranged at the bottom and the side surfaces, wherein the water supply pressure is 0.5-0.7 MPa;
s2, fluidization and precipitation of water slag: grabbing precipitated water slag at the bottom of the sedimentation tank by using a grab bucket on a travelling crane above the sedimentation tank, and putting the precipitated water slag into a fluidization tank for fluidization, wherein the mixing ratio of slag and water is 40-60: 100;
s3, starting a slurry pump: pumping the fluidized slag water mixture to an inlet of a filter press through a pipeline;
s4, starting a filter press and a belt conveyor: the mud cake after press filtration falls into the belt conveyor from the slag hole of the press filter and is transported outwards, and meanwhile, press filtration water flows into the water absorbing well through a pipeline.
Compared with the prior art, the invention has the beneficial effects that: the invention improves the Minte method water slag treatment facility, fluidizes the fished sediment water slag by arranging the fluidization groove, the slurry pump, the pipeline, the filter press and the belt conveyor, conveys the sediment water slag by the slurry pump, conveys the sediment water slag by the filter press, conveys the mud cake by the belt, recycles the backwater, cancels the link of transporting the sediment water slag outside by a forklift and a car after the sediment water slag is salvaged by the sedimentation tank, avoids secondary pollution on the field and the road surface, saves the cleaning field and the transportation cost, has simple structure, low energy consumption, easy operation and good sediment water slag treatment effect.
Drawings
Fig. 1 is a schematic top view of the structure of the present invention.
FIG. 2 is a left side view of the fluidization groove structure of FIG. 1.
Fig. 3 is a right side view of the fluidization groove structure of fig. 2.
In the figure: 1. a stirring cage pool; 2. a filter; 201. a water outlet; 3. a water tank; 4. a sedimentation tank; 5. driving; 501. a grab bucket; 6. a fluidization tank; 601. a water supply pipe; 602. a valve; 603. a water spraying pipe; 604. a screen; 605. a spray hole; 7. a pipe; 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 jet plate; 14. a granulating tower; 1401. slag formation; 15. a water slag ditch; 16. a cage stirring machine; 17. a funnel; 18. a bracket; 19. a secure channel.
Detailed Description
The invention will be further described with reference to the drawings and examples. Referring to fig. 1 to 3, a blast furnace sedimentation tank water 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 groove 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 flushing box 13, a granulating tower 14 and a water slag ditch 15, wherein the filter 2 is arranged behind an overflow port of the stirring cage tank 1, a water outlet below the filter 2 is connected with the sedimentation tank 4 through the water tank 3, a grab bucket 501 is arranged on a travelling crane 5 above the sedimentation tank 4, the water suction well 11 is connected with the flushing box 13 through the slag flushing pump 12 and the pipeline 7, a spray orifice plate 1301 of the flushing box 13 is in butt joint with the granulating tower 14, the granulating tower 14 is connected with the stirring cage tank 1 through the water slag ditch 15, the fluidization groove 6 is a V-shaped groove or U-shaped groove with two closed ends, a water spraying pipe 603 with holes is arranged at the bottom and side surfaces, the water spraying pipe 603 passes through the end surface of the fluidization groove 6 and is connected with the slag supply pipeline 6 through the filter press 7, and is connected with the filter press 9 through the water inlet of the filter press 9, and the water outlet 9 is connected with the water outlet 9 through the pipeline 9. The end closing surface of the injection water pipe 603 is provided with at least three spray holes 605. The bottom injection water pipe 603 is provided with at least three rows of spray holes 605 along the length direction of the pipe body, the spray holes 605 are upward, and the spray holes are distributed at intervals along the cambered surface sector of the pipe body. The bottom injection water pipe 603 is arranged at an inclined angle of 1 deg. to 3 deg. in the horizontal direction. A screen 604 is provided in the fluidization tank 6. The mesh opening of the screen 604 is 30 mm-50 mm. The screen 604 is made of stainless steel material. The outside bracket 18 of the fluidization tank 6 is provided with a safety channel 19.
The application method of the slag treatment device of the blast furnace sedimentation tank comprises the following steps:
s1, filling water into the fluidization groove 6: opening a valve 602 on a water supply pipeline 601, and continuously supplying water to a V-shaped or U-shaped fluidization groove 6 through a spray water pipe 603 arranged at the bottom and at the side, wherein the water supply pressure is 0.5-0.7 MPa;
s2, fluidization and precipitation of water slag: the grab bucket 501 on the travelling crane 5 above the sedimentation tank 4 is used for grabbing sediment water slag at the bottom of the sedimentation tank 4, the sediment water slag is put into the fluidization tank 6 for fluidization, and the slag-water mixing ratio is 40-60: 100;
s3, starting a slurry pump 8: pumping the fluidized slag water mixture to an inlet of a filter press 9 through a pipeline 7;
s4, starting the filter press 9 and the belt conveyor 10: the mud cake after press filtration falls into the belt conveyor 10 from the slag hole of the press filter 9 for outward transportation, and meanwhile, the press filtration water flows into the water absorbing well 11 through the pipeline 7.
As shown in FIG. 1, the Ming and Tech process water slag treatment facilities are generally arranged stepwise. The granulating tower 14 is arranged below a blast furnace slag ditch, the jet hole plate 1301 of the punching box 13 is in butt joint with the granulating tower 14, jet holes on the jet hole plate 1301 face the direction from which high-temperature slag 1401 comes, high-pressure water in the punching box 13 is ejected when the blast furnace is used for discharging slag, the high-pressure water is opposite to the high-temperature slag 1401 to be punched into a water-slag mixture, the water-slag mixture is punched into the stirring cage pool 1 arranged at the middle height through the water-slag ditch 15, the stirring cage pool 1 is of a concrete structure, the size is determined according to the volume and the slag flushing amount of the blast furnace, the bottom surface is a slope-shaped surface with an inclined angle of 20 degrees, a U-shaped groove is arranged on the slope-shaped surface upwards, the stirring cage 16 is placed in the U-shaped groove, and the stirring cage 16 is installed in the stirring cage pool 1 with an inclined angle of 20 degrees, so that the stirring cage 16 drags for bottom water slag, dehydrates into dry slag, and falls into the belt conveyor 10 through the hopper 17. The stirring cage pool 1 is provided with overflow ports, the overflow ports are formed by arranging an upper baffle plate and a lower baffle plate at intervals into a labyrinth type, the upper baffle plate blocks water surface scum (foam slag), the lower baffle plate blocks precipitated slag, slag flushing water flows in from the lower port of the upper baffle plate and flows into a drum-type filter 2 arranged from the upper port of the lower baffle plate, a filter screen with meshes of 0.80-2.0 mm is arranged 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 culvert and is communicated with a water tank 3, and the water tank 3 is connected with an open channel of the sedimentation tank 4. The sedimentation tank 4 is arranged at the bottom, namely a sedimentation pit is dug on the ground, so that the water tank 3 is connected with the sedimentation tank 4 to form a gradient, the slag flushing water containing fine particle slag after filtration runs down the gradient, and the slag flushing water enters the sedimentation tank 4 to sediment fine slag, and clean water on the surface layer flows into the water absorbing well 11. A traveling rail (not shown) extending to the upper part of the fluidization groove 6 beside the sedimentation tank 4 is arranged above the sedimentation tank 4, a grab bucket 501 is arranged on the traveling crane 5 and used for grabbing sediment water slag at the bottom of the sedimentation tank 4, and the sediment water slag is put into the fluidization groove 6. The fluidization tank 6 is fixed by a bracket 18 by adopting a V-shaped groove (see figure 3 for details) or a U-shaped groove with two closed ends, an injection water pipe 603 is arranged in the fluidization tank 6, the injection water pipe 603 penetrates through one end face of the fluidization tank 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 to the fluidization tank 6 by the injection water pipe 603, and the water supply pressure is 0.5-0.7 MPa. Two side surfaces in the fluidization groove 6 are provided with jet water pipes 603 with holes, the side surface jet water pipes 603 are provided with jet holes 605 along the length direction of the pipe body, the jet holes 605 are downwards, preferably three to five rows of jet holes 605, the end sealing surface is provided with jet holes 605, preferably three to five jet holes 605 (see figures 2 and 3 in detail), so as to supply water for quickly diluting the input precipitated fine slag. The bottom of the fluidization tank 6 is provided with a water spraying pipe 603 with holes, the water spraying pipe 603 at the bottom is provided with spray holes 605 along the length direction of the pipe body, the spray holes 605 are upward, optimally three to five rows of spray holes 605, the spray holes 605 are distributed at intervals along the arc surface sector of the pipe body, and the sealing surface of the terminal is provided with spray holes 605, optimally three to eight spray holes 605 (see figures 2 and 3 in detail) so as to spray water for stirring, quickly fluidize and precipitate fine slag, and the slag-water mixing ratio is 40 to 60:100. the other end face of the fluidization groove 6 is provided with a slurry outlet, the slurry outlet is welded with a pipeline 7, and then is connected with a slurry pump 8 and is connected with an inlet of a filter press 9. The bottom injection water pipe 603 is arranged at an angle θ of 1 ° to 3 ° in the horizontal direction (see fig. 2 in detail) so that the slag-water mixture flows toward the slurry outlet. The slurry pump 8 is activated and the fluidised slag water mixture may be pumped through the conduit 7 to the inlet of the filter press 9. In order to prevent sundries from blocking a slurry outlet and enabling slurry to flow smoothly, a screen 604 with meshes of 30-50 mm is arranged above an inner bottom injection water pipe 603 of the fluidization groove 6 so as to block obstacles and keep the lower part smooth. The screen 604 is preferably made of stainless steel material to improve the corrosion resistance of the screen 604. A belt conveyor 10 is arranged below the slag hole of the filter press 9, so that the mud cakes after filter pressing fall onto the belt conveyor 10 from the slag hole of the filter press 9 and are transported outwards. The water outlet of the filter press 9 is connected with the water absorbing well 11 through a pipeline 7, so that the filter pressing water flows into the water absorbing well 11 through the pipeline 7 for recycling. The water absorbing well 11 is connected with the flushing tank 13 through the slag flushing pump 12 and the pipeline 7, and the slag flushing pump 12 pumps water from the water absorbing well 11 for the flushing tank 13 to circularly flush slag. Safety channels 19 are provided on the outside brackets 18 of the fluidization tank 6 for daily observation and operation (see fig. 2, 3 for details).
Fig. 2 is a left side view of the structure of the fluidization groove 6 of fig. 1, in which the fluidization groove 6 is fixed by a bracket 18, a safety channel 19 is welded on the upper surface, an injection water pipe 603 is installed on the upper and bottom surfaces of the inside as seen from the cut-away surface, the bottom injection water pipe 603 is obliquely arranged at an angle of θ of 1 ° to 3 ° in the horizontal direction, and a screen 604 is covered on the upper surface of the bottom injection water pipe 603. The water injection pipe 603 of the upper and bottom surfaces shown on the right in fig. 2 is connected to the water supply pipe 601 through the end surface of the fluidization tank 6, and the water supply pipe 601 is provided with a valve 602. The left side of fig. 2 shows that the slurry port 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 in fig. 2, in fig. 3, the fluidization groove 6 is fixed by a bracket 18, a safety channel 19 is welded on the fluidization groove 6, the injection water pipes 603 are arranged on the upper surface and the bottom surface of the inside of the fluidization groove, the screen 604 is covered on the upper surface of the bottom injection water pipe 603, three rows of spray holes 605 are drilled on the side injection 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 the sealing surface of the terminal. The bottom injection 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, the spray holes are distributed at intervals along the arc surface sector of the pipe body, and the terminal sealing surface is drilled with eight spray holes 605.
Example 1: the invention is applied to 2500m 3 The blast furnace is taken as an example, and the realizable mode of the invention is further described.
As shown in FIGS. 1 to 3, at 2500m 3 The granulating tower 14 is arranged under the blast furnace slag ditch, 60 high-pressure water spray holes are drilled in the 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 discharges slag, high-pressure water in the punching box 13 is sprayed out and is subjected to opposite punching with the high-temperature slag 1401, water quenching is carried out, the water slag mixture is punched into a water slag mixture, the water slag mixture is punched into the stirring cage pool 1 through the water slag groove 15, the stirring cage pool 1 is of a concrete structure, the length-width dimension is 13000mm multiplied by 3500mm, and the deepest depth is 3000mm. The stirring cage machine 16 is arranged in the stirring cage pool 1 at an inclined angle of 20 degrees, and the model is selectedMTC2500JL produced by Beijing Ming New technology Limited liability company, spiral outer diameter phi 2540mm, blade pitch 915mm, rotating speed 3-7 r/min, and water slag treatment capacity 360-650 t/h. Along with the rotation of the stirring cage machine 16, the spiral blades convey the water slag at the bottom of the stirring cage pool 1 upwards, the water flows back downwards by gravity, the water slag is dehydrated into dry slag, the dry slag is conveyed to the head funnel 17, and the dry slag falls into the belt conveyor 10 from the funnel 17 to be transported and sold. The overflow port of the stirring cage pool 1 is 800mm in height, width and depth, 0800mm and 1800mm, the upper baffle plate and the lower baffle plate of the overflow port are arranged in a labyrinth mode at intervals of 300mm, the upper baffle plate is 600mm in height, 2mm in width, 3800mm, steel plates are used for blocking water surface scum (foam slag), the lower baffle plate is 400mm in width, 5800mm and concrete, sediment is blocked, flushing water flows in from the lower port of the upper baffle plate and then flows into the drum-type filter 2 arranged from the upper port of the lower baffle plate, and the model of the drum-type filter 2 is MTC2500GL produced by Beijing Ming New technology Limited liability company, and the diameter of the drum-type filter 2 is 3000mm. The rolling surface of the drum-type filter 2 is covered with a strip filter screen with the mesh width of 0.80mm multiplied by 6 and the length of 72.0mm, 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, and flows into a water tank 3 through a prefabricated L-shaped duct with the diameter of 1000mm, the height of the water tank 3 multiplied by the width of 1200mm is built by concrete, and the water tank 3 is connected with an open channel of a sedimentation tank 4. The sedimentation tank 4 is arranged at the bottom, namely, a concrete pit with the length, width and depth of 20000mm multiplied by 12000mm multiplied by 6000mm is dug on the ground, the water tank 3 is connected with the sedimentation tank 4 to form a gradient, the slag flushing water containing fine particle slag after filtration flows down the gradient, the slag flushing water is flushed into the sedimentation tank 4 to sediment the fine slag, and the clean water on the surface layer flows into the water absorbing well 11 with the diameter of 5000mm and the depth of 10000 mm. A traveling rail (not shown) extending to the upper part of the fluidization groove 6 beside the sedimentation tank 4 is arranged above the sedimentation tank 4, a grab bucket 501 is arranged on the traveling crane 5 and used for grabbing sediment water slag at the bottom of the sedimentation tank 4, and the sediment water slag is put into the fluidization groove 6. The fluidization tank 6 is made of a steel plate with 12mm thick, and has the length x width of 5000mm x 2500mm, and is fixed by a hexagonal steel or round steel bracket 18 with 25mm diameter, and a steel structure safety channel 19 is arranged on the bracket 18 for daily observation and operation, and is internally provided withThe water injection pipe 603, the water injection pipe 603 is made of welded pipe or seamless steel pipe, the water injection 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 DN100, a valve 602 on the water supply pipeline 601 is opened, water is continuously supplied to the fluidization groove 6 through the water injection pipe 603, and the water supply pressure is 0.6MPa. Two side surfaces in the fluidization groove 6 are provided with perforated water spraying pipes 603 with nominal diameter DN30, four rows of spray holes 605 with 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 diameter of 3mm are drilled on the terminal sealing surface so as to supply water for rapid dilution of the input precipitated slag. The bottom of the fluidization tank 6 is provided with a perforated spraying water pipe 603 with a nominal diameter DN50, the spraying water pipe 603 at the bottom is provided with four rows of spraying holes 605 with a diameter of 5mm along the length direction of the pipe body, the spraying holes 605 are upward and distributed at intervals along the arc surface sector of the pipe body, and the sealing surface of the terminal is provided with eight spraying holes 605 with a diameter of 5mm so as to spray water for stirring, rapidly fluidize and precipitate fine slag, and the slag-water mixing ratio is 55-60: 100. a slurry outlet with the diameter of 200mm is arranged on the other end face of the fluidization groove 6, a pipeline 7 with the nominal diameter of DN200 is welded on the slurry outlet, and then a slurry pump 8 is connected, wherein the model of the slurry pump 8 is selected from 200ZJG-I-B45 produced by Shijia stone pump slurry pump industry Co., ltd, and the flow rate of the pump is 356m 3 And/h, the lift is 20.6M, the rotating speed is 980r/min, and the power Y is 250M-6-37KW. The pipe 7 is connected to a concentration tank on the belt filter press 9, and is connected to an inlet of the belt filter press 9 through the pipe 7. The belt filter press 9 is 4DYQN3500GL manufactured by Zhengzhou Sades mechanical Co., ltd 6 The machine host 17KW, the complete equipment 55KW, the filter belt width 3500mm, the number of the net belts 4, the paired rollers extrusion 1 group, the slurry treatment capacity 110-150 m 3 And/h, the speed of the filter belt is adjusted to be 2-15 m/min, and the yield of the filter cake is 30-45 m 3 And/h, the water content of the filter cake is 17-35%. And a polyacrylamide flocculant is added into a concentration tank to precipitate flocculation tailings, and supernatant fluid is discharged into a water absorbing well 11, so that tank bottom flocculate is sent to an inlet of the belt filter press 9 through a pipeline 7, the filtering amount of the belt filter press 9 can be reduced, and the operation cost is reduced. The bottom injection water pipe 603 is arranged obliquely along the horizontal direction θ of 1 ° to 3 °, in this embodiment 2 °, so that the slag-water mixture flows fast toward the slurry outlet. Starting the slurry pump8, the fluidized slag water mixture can be pumped to a concentration tank through a pipeline 7 and further to the inlet of a belt filter press 9. In order to prevent sundries from blocking the slurry outlet and the slurry from flowing smoothly, a screen 604 with 50mm square mesh openings is arranged above the inner bottom injection water pipe 603 of the fluidization groove 6 so as to block obstacles and keep the lower part flowing smoothly. The screen 604 is made of stainless steel material to improve the corrosion resistance of the screen 604. A belt conveyor 10 is arranged below the slag hole of the belt filter press 9, so that the mud cake after press filtration falls onto the belt conveyor 10 from the slag hole of the belt filter press 9 and is transported outwards, and the water content of the mud cake is 18%. The water outlet of the belt filter press 9 is connected with the water absorbing well 11 through a pipeline 7 with the nominal diameter DN100, so that the filter pressing water flows into the water absorbing well 11 through the pipeline 7 for recycling. The water absorbing well 11 is connected with the flushing box 13 through the slag flushing pump 12 and the pipeline 7 with nominal diameter of DN100, and the slag flushing pump 12 pumps water from the water absorbing well 11 for the flushing box 13 to circularly flush slag.
Example 2: applied to 1050m with the invention 3 The blast furnace is taken as an example, and the realizable mode of the invention is further described.
As shown in FIGS. 1-3, at 1050m 3 The granulating tower 14 is arranged under the blast furnace slag ditch, 40 high-pressure water spray holes are drilled on a spray hole plate 1301 of the 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 to the high-temperature slag 1401 to be subjected to water quenching, so that a water slag mixture is punched, the water slag mixture is punched into the stirring cage pool 1 through the water slag ditch 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 is 2800mm. The stirring cage machine 16 is installed in the stirring cage pool 1 at an inclined angle of 20 degrees, and the model is MTC2500JL. Along with the rotation of the stirring cage machine 16, the water slag at the bottom of the stirring cage pool 1 is conveyed upwards by the spiral blades, water flows back downwards by gravity, the water slag is dehydrated into dry slag, the dry slag is conveyed to the head cement funnel 17, and then falls into the belt conveyor 10 from the funnel 17 to be transported and sold. The overflow port of the stirring cage pool 1 has the height x width x depth of 600mm x 600mm, the upper baffle plate and the lower baffle plate of the overflow port are arranged in a labyrinth mode at intervals of 300mm, the height x width of the upper baffle plate made of steel plates is 400mm x 600mm, the floating slag (foam slag) on the water surface is blocked, the height x width of the lower baffle plate made of concrete is 300mm x 600mm, the sediment slag is blocked, and the slag flushing water flows out of the upper baffle plateThe lower port flows in, and then the roller filter 2 is arranged from the upper port of the lower baffle, the model of the roller filter 2 is MTC2500GL, and the diameter is 3000mm. The rolling surface of the drum-type filter 2 is covered with a strip filter screen with the 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, and 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 an open channel of a sedimentation tank 4. The sedimentation tank 4 is arranged at the bottom, namely a concrete pit with the length multiplied by the width multiplied by the depth of 18000mm multiplied by 10000mm multiplied by 5000mm is dug on the ground, the water tank 3 is connected with the sedimentation tank 4 to form a gradient, the slag flushing water containing fine particle slag after filtration flows down the gradient, the slag flushing water enters the sedimentation tank 4 to sediment fine slag, and the clean water on the surface layer flows into the water absorbing well 11 with the diameter of 4000mm and the depth of 9000 mm. A traveling rail (not shown) extending to the upper part of the fluidization groove 6 beside the sedimentation tank 4 is arranged above the sedimentation tank 4, a grab bucket 501 is arranged on the traveling crane 5 and used for grabbing sediment water slag at the bottom of the sedimentation tank 4, and the sediment water slag is put into the fluidization groove 6. The fluidization tank 6 is made of a V-shaped groove (see figure 3 in detail) with two closed ends, a 10mm thick steel plate is adopted, the length and width of an opening are 4500mm multiplied by 2200mm, the fluidization tank is fixed through a pentagram steel bracket 18, a steel structure safety channel 19 is arranged on the bracket 18 for daily observation and operation, a welding pipe control injection water pipe 603 is arranged in the fluidization tank, the injection water pipe 603 penetrates through one end face of the fluidization tank 6 to be connected with a water supply pipeline 601 with a nominal diameter DN100, a valve 602 on the water supply pipeline 601 is opened, water is continuously supplied to the fluidization tank 6 through the injection water pipe 603, and the water supply pressure is 0.55MPa. Two side surfaces in the fluidization tank 6 are provided with perforated spraying water pipes 603 with nominal diameter DN25, three rows of spraying holes 605 with diameter of 2mm are drilled on the side spraying water pipes 603 along the length direction of the pipe body, the spraying holes 605 are downward, and four spraying holes 605 with diameter of 2mm are drilled on the terminal sealing surface so as to supply water for rapid dilution of the input precipitated slag. The bottom of the fluidization tank 6 is provided with a perforated spraying water pipe 603 with a nominal diameter DN50, the spraying water pipe 603 at the bottom is provided with three rows of spraying holes 605 with a diameter of 4mm along the length direction of the pipe body, the spraying holes 605 are upward and distributed at intervals along the arc surface sector of the pipe body, and the sealing surface of the terminal is provided with six spraying holes 605 with a diameter of 4mm so as to sprayStirring by water jet, and rapidly fluidizing and precipitating fine slag to ensure that the slag-water mixing ratio is 45-55: 100. a slurry outlet with the diameter of 200mm is arranged on the other end face of the fluidization groove 6, a pipeline 7 with the nominal diameter of DN200 is welded on the slurry outlet, and then a slurry pump 8 is connected, the model of the slurry pump 8 is 150ZJG-I-B45 produced by Shijia stone pump slurry pump industry Co., ltd, and the flow rate of the pump is 247m 3 And/h, the lift is 26.3M, the rotating speed is 980r/min, and the power Y is 250M-6-37KW. The pipe 7 is connected to the inlet of a plate and membrane filter press 9. The model 9 of the belt filter press is selected from an automatic plate-pulling membrane filter press X manufactured by Kunshan Kunjie environmental protection machinery Co., ltd A M GZ1000/2000-40U, the filtering area of the machine is 1000m 2 The filter plate has the dimensions of 2000mm multiplied by 2000mm, the filter cake thickness is 40mm, the filter chamber volume is 20000 liters, the number of diaphragm plates is 70, the number of van-type plates is 69, the motor power is 5.5KW, the complete equipment is 45KW, and the filter pressing is 0.8MPa. The bottom injection water pipe 603 is arranged obliquely along the horizontal direction θ of 1 ° to 3 °, in this embodiment 1 °, so that the slag-water mixture flows fast toward the slurry outlet. The slurry pump 8 is activated 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 sundries from blocking the slurry outlet and the slurry from flowing smoothly, a screen 604 with a mesh opening of 30mm square is arranged above the inner bottom injection water pipe 603 of the fluidization groove 6 so as to block obstacles and keep the lower part flowing smoothly. The screen 604 is made of stainless steel material to improve the corrosion resistance of the screen 604. A belt conveyor 10 is arranged below the slag hole of the belt filter press 9, so that the mud cake after press filtration falls onto the belt conveyor 10 from the slag hole of the belt filter press 9 and is transported outwards, and the water content of the mud cake is 21%. The water outlet of the belt filter press 9 is connected with the water absorbing well 11 through a pipeline 7 with the nominal diameter DN100, so that the filter pressing water flows into the water absorbing well 11 through the pipeline 7 for recycling. The water absorbing well 11 is connected with the flushing box 13 through the slag flushing pump 12 and the pipeline 7 with nominal diameter of DN100, and the slag flushing pump 12 pumps water from the water absorbing well 11 for the flushing box 13 to circularly flush slag.
The filter press 9 of the present invention includes a belt filter press, a plate frame filter press, a chamber filter press, and a membrane filter press, which are all known and commonly available in the market, and the structure and the working principle thereof are not described herein.
Claims (5)
1. The slag treatment device comprises a stirring cage tank, a filter, a water tank, a sedimentation tank, a grab bucket, a fluidization groove, a pipeline, a slag pump, a filter press, a belt conveyor, a water absorbing well, a slag flushing pump, a flushing box, a granulating tower and a slag water ditch, wherein the filter is arranged behind an overflow port of the stirring cage tank; the sealing surface of the spraying water pipe terminal is provided with at least three spray holes; the bottom injection 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 sector; the bottom injection water pipe is arranged at an inclined angle of 1-3 degrees along the horizontal direction; the slurry outlet of the other end face of the fluidization groove is connected with a slurry pump, and the water outlet of the filter press is connected with a water absorbing well through a pipeline.
2. The blast furnace sedimentation tank water slag treatment device according to claim 1, wherein the mesh opening of the screen is 30 mm-50 mm.
3. A blast furnace sedimentation tank water slag treatment device as claimed in claim 1 or 2, wherein the screen is made of stainless steel material.
4. The blast furnace sedimentation tank water slag treatment device according to claim 1, wherein a safety channel is arranged on an outer side bracket of the fluidization tank.
5. The application method of the slag treatment device of the blast furnace sedimentation tank comprises the following steps:
s1, filling water into a fluidization groove: starting a valve on a water supply pipeline, and continuously supplying water to a V-shaped or U-shaped fluidization groove through injection water pipes arranged at the bottom and the side surfaces, wherein the water supply pressure is 0.5-0.7 MPa;
s2, fluidization and precipitation of water slag: grabbing precipitated water slag at the bottom of the sedimentation tank by using a grab bucket on a travelling crane above the sedimentation tank, and putting the precipitated water slag into a fluidization tank for fluidization, wherein the mixing ratio of slag and water is 40-60: 100;
s3, starting a slurry pump: pumping the fluidized slag water mixture to an inlet of a filter press through a pipeline;
s4, starting a filter press and a belt conveyor: the mud cake after press filtration falls into the belt conveyor from the slag hole of the press filter and is transported outwards, and meanwhile, press filtration water flows into the water absorbing well through a pipeline.
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| CN202010985483.0A CN111996316B (en) | 2020-09-18 | 2020-09-18 | Slag treatment device of blast furnace sedimentation tank and application method thereof |
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|---|---|---|---|---|
| CN2364051Y (en) * | 1999-03-06 | 2000-02-16 | 唐山市嘉恒实业有限公司 | Slag granulating device for converter steelmaking |
| CN2846426Y (en) * | 2005-08-26 | 2006-12-13 | 首钢总公司 | Blast furnace water slag treating system and device |
| CN207520741U (en) * | 2017-10-17 | 2018-06-22 | 中冶节能环保有限责任公司 | A kind of closed circuit water supply system for slag processing |
| CN212293628U (en) * | 2020-09-18 | 2021-01-05 | 新余钢铁股份有限公司 | Water slag treatment device for blast furnace sedimentation tank |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10351454B2 (en) * | 2013-05-15 | 2019-07-16 | Mineworx Technologies Ltd. | Mining apparatus with water reclamation system |
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|---|---|---|---|---|
| CN2364051Y (en) * | 1999-03-06 | 2000-02-16 | 唐山市嘉恒实业有限公司 | Slag granulating device for converter steelmaking |
| CN2846426Y (en) * | 2005-08-26 | 2006-12-13 | 首钢总公司 | Blast furnace water slag treating system and device |
| CN207520741U (en) * | 2017-10-17 | 2018-06-22 | 中冶节能环保有限责任公司 | A kind of closed circuit water supply system for slag processing |
| CN212293628U (en) * | 2020-09-18 | 2021-01-05 | 新余钢铁股份有限公司 | Water slag treatment device for blast furnace sedimentation tank |
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