CN115044717A - Blast furnace system fly ash resource utilization method and device - Google Patents
Blast furnace system fly ash resource utilization method and device Download PDFInfo
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- CN115044717A CN115044717A CN202210570734.8A CN202210570734A CN115044717A CN 115044717 A CN115044717 A CN 115044717A CN 202210570734 A CN202210570734 A CN 202210570734A CN 115044717 A CN115044717 A CN 115044717A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000010881 fly ash Substances 0.000 title claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 291
- 229910052742 iron Inorganic materials 0.000 claims abstract description 143
- 239000002893 slag Substances 0.000 claims abstract description 90
- 239000000428 dust Substances 0.000 claims abstract description 82
- 239000007921 spray Substances 0.000 claims abstract description 49
- 238000005507 spraying Methods 0.000 claims abstract description 28
- 239000002956 ash Substances 0.000 claims description 72
- 230000001629 suppression Effects 0.000 claims description 29
- 230000000903 blocking effect Effects 0.000 claims description 25
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000002699 waste material Substances 0.000 abstract description 5
- 238000002156 mixing Methods 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 239000006260 foam Substances 0.000 description 8
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 239000002994 raw material Substances 0.000 description 5
- 238000004064 recycling Methods 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 235000014692 zinc oxide Nutrition 0.000 description 1
- RNWHGQJWIACOKP-UHFFFAOYSA-N zinc;oxygen(2-) Chemical class [O-2].[Zn+2] RNWHGQJWIACOKP-UHFFFAOYSA-N 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a resource utilization method and a resource utilization device for dedusting ash of a blast furnace system, relates to the technical field of blast furnace production, and aims to solve the problems that iron elements are wasted and the mixing is not sufficient and uniform due to the fact that the dedusting ash is directly added from the upper surface of flowing molten iron; the method comprises the steps that a slag wall is arranged at the upper part of a molten iron runner, a slag outlet is formed in one side, close to molten iron, of the slag wall, the slag wall blocks slag on the upper surface of the molten iron and the molten iron runner is discharged through the slag outlet; arranging a spray gun above one side of the slag stopping wall far away from the slag outlet, spraying dust on the upper surface of the molten iron with the slag removed, and reducing the cross-sectional area of the molten iron runner on one side of the slag stopping wall far away from the slag stopping wall below the spray gun; the invention can ensure that the blast furnace dedusting ash is fully contacted with the molten iron, the iron element waste caused by separation of the dedusting ash by the molten slag is avoided, the dedusting ash and the molten iron are fully and uniformly mixed, the dedusting ash can be efficiently utilized, and the waste resource utilization and the green production degree are favorably improved.
Description
Technical Field
The invention relates to the technical field of blast furnace production, in particular to a resource utilization method and device for dedusting ash of a blast furnace system.
Background
The blast furnace production process is the link of the largest material consumption of the whole iron and steel combination company and is also the main battlefield for generating the three industrial wastes. At present, the waste heat and the excess pressure in the waste gas of a blast furnace are mostly used for generating electricity or partially replacing electric energy by adopting BPRT (blast furnace gas recirculation) and TRT (blast furnace gas recirculation) technologies, and the waste gas after electricity generation, namely the blast furnace gas, can be used as a gas protector for surrounding residents to heat and a gas stove; soft water closed circulating water is generally adopted for blast furnace cooling water at present, and waste water generated in other links can also be used as slag flushing water; the blast furnace solid waste can be divided into two parts of blast furnace slag and dust, the blast furnace slag can be used as a raw material for producing building materials after a slag flushing process, the dust is generally collected by dust removal equipment and transported to a stock yard through an in-plant truck, and the blast furnace solid waste is processed into finished ore after the stock yard and iron-containing raw materials are mixed and is used as raw materials for blast furnace production to enter the furnace again for recycling.
At present, the volume of the mainstream blast furnace at home and abroad is concentrated on 2500m 3 About 8000t of molten iron is produced per day, about 30kg of blast furnace ash is produced per ton of molten iron produced, and the daily ash production amount of the blast furnace is calculated to be 240 t. Conventionally, these ashes have to be transported by truck plants to the raw material plant, mixed with other raw materials, put into a sintering process for re-sintering, transported by belts and stockedThe system re-enters the blast furnace. When a large amount of conveying capacity is consumed, the sintering operation needs to be carried out again in the sintering process, and the carbon emission is increased. The invention has the publication number of CN101818263B and is named as a recovery processing method of zinc-containing and iron-containing dust and mud, and discloses a method for continuously and uniformly adding the zinc-containing and iron-containing mud material into molten iron flow from a storage bin at a molten iron main ditch, a swinging spout or a molten iron shunt position of each molten iron tank, reducing iron oxides and zinc oxides in the dust and mud material by using the heat of high-temperature molten iron, melting the reduced metal iron into blast furnace molten iron for steelmaking, and separating and recycling the reduced zinc into flue gas and molten iron due to lower boiling point 3 The slag density in the molten iron is about 2.0g/cm 3 The fly ash density was also about 2.0g/cm 3 Therefore, a large amount of slag floats on the upper surface of molten iron, if the dedusting ash is directly added into the molten iron, most of the dedusting ash can be discharged along with the molten slag due to the fact that the dedusting ash is close to the density of the molten slag, so that iron elements are wasted, and in addition, the dedusting ash is added from the upper surface of the molten iron in the flowing process, so that the two are difficult to be fully and uniformly mixed; therefore, a method and a device for recycling the fly ash in the blast furnace system are needed to solve the problem.
Disclosure of Invention
The invention aims to provide a resource utilization method and device for dedusting ash of a blast furnace system, which are used for solving the problems that iron elements are wasted and the mixing is not sufficient and uniform due to the fact that the dedusting ash is directly added from the upper surface of flowing molten iron.
In order to achieve the purpose, the invention provides the following technical scheme: a resource utilization method for blast furnace system dedusting ash comprises the steps that a slag blocking wall is arranged at the upper part of a molten iron runner, a slag outlet is formed in one side, close to the molten iron, of the slag blocking wall, slag on the upper surface of the molten iron is blocked by the slag blocking wall, and the molten iron runner is discharged through the slag outlet; and a spray gun is arranged above one side of the slag blocking wall, which is far away from the slag outlet, dust is sprayed on the upper surface of the molten iron from which the slag is removed, and the cross-sectional area of a molten iron runner is reduced on one side, which is far away from the slag blocking wall, below the spray gun, so that the flow speed of the molten iron sprayed with the dust is accelerated.
Preferably, the solid-gas ratio of the dust removed in the spray gun to the compressed air is controlled to be 35-40 kg/kg.
Preferably, a dust suppression cover is arranged above the spray gun to cover the upper part of the violent reaction area, and a dust removal opening is arranged on the dust suppression cover and connected with iron yard dust removal equipment.
Preferably, the included angle between the spraying direction of the spray gun and the flow direction of the molten iron is an acute angle.
The invention provides another technical scheme that: the device for the method comprises a groove-shaped high-temperature molten pool, wherein a molten iron inlet and a molten iron outlet are respectively formed in two ends of the groove-shaped high-temperature molten pool, an ash spraying area is arranged in the middle of the high-temperature molten pool, a spray gun is arranged above the ash spraying area, a slag blocking wall is arranged at the upper part between the ash spraying area and the molten iron inlet, two ends of the slag blocking wall are respectively and fixedly connected with the inner walls of two sides of the high-temperature molten pool, and a molten slag outlet is formed in one side wall of the high-temperature molten pool, which is positioned at one side of the slag blocking wall, which is close to the molten iron inlet; a closing-up step is arranged at the bottom between the molten iron outlet and the ash spraying area.
Preferably, the upper end of the high-temperature molten pool is also provided with a dust suppression cover, and the dust suppression cover at least covers the upper part of the ash spraying area.
Preferably, the dust suppression cover is provided with a spray gun fixing port for positioning the spray gun, and the ash outlet of the spray gun penetrates through the spray gun fixing port and is arranged below the dust suppression cover.
Preferably, the dust suppression cover is provided with a dust removal opening above the dust spraying area and used for being connected with dust removal equipment.
Preferably, the dust suppression cover covers the whole high-temperature molten pool, and an observation port is formed in one side, close to the molten iron inlet, of the dust suppression cover, and is used for observing the position and the orientation of the ash outlet of the spray gun so as to be convenient to adjust.
Preferably, the high-temperature molten pool is positioned in a transition region between the main molten iron runner and the branch molten iron runner, and the molten iron inlet and the molten iron outlet are respectively connected with the main molten iron runner and the branch molten iron runner.
Compared with the prior art, the invention has the beneficial effects that:
1. the resource utilization method and the resource utilization device for the blast furnace system fly ash can efficiently utilize the blast furnace fly ash, avoid transportation waste and carbon emission increase caused by truck transportation and re-entry into the furnace, and are favorable for further improving waste resource utilization and green production degree; in addition, the addition of the fly ash can improve the content of effective components and physical heat in the high-temperature molten iron, and is beneficial to improving the quality of main products of the blast furnace.
2. According to the method and the device for recycling the dedusting ash of the blast furnace system, the slag on the surface of the molten iron is blocked and removed, and then the dedusting ash is sprayed, so that the dedusting ash can be ensured to be fully contacted with the molten iron, and iron element waste caused by separation of the dedusting ash by the slag can be avoided.
3. According to the method and the device for recycling the dedusting ash of the blast furnace system, the sectional area of the flow channel is reduced after ash spraying, the flow speed is increased under the condition that the flow is not changed, molten iron is blocked and is internally turbulent, the molten iron spontaneously plays a role in stirring and mixing under the dual actions of acceleration and turbulence, the dedusting ash which is just sprayed in can be fully and uniformly mixed, and the full contact and the full reaction in the flowing process are facilitated.
4. This blast furnace system dust removal ash resource utilization method realizes easily, and the device is simple reasonable, still is provided with and presses down the dirt lid and can avoid operational environment to worsen, and the dust removal mouth that sets up on it can reduce the dust and outwards spread, can reduce the gaseous detention that generates simultaneously and lead to the molten iron surface to produce a large amount of foam sediment and block the contact of molten iron and dust removal ash, and the viewing aperture conveniently observes spray gun direction and position, is convenient for adjust.
5. According to the resource utilization method and device for the dedusting ash of the blast furnace system, a dense phase transportation mode with a large proportion of the dedusting ash and compressed air is adopted, the contact area between the dedusting ash sprayed out by the obliquely arranged spray guns and molten iron is large, and foam slag can be avoided.
Drawings
FIG. 1 is a schematic perspective view of a high temperature molten bath according to the present invention;
FIG. 2 is a schematic cross-sectional view of the high temperature molten bath of the present invention.
In the figure: 1. a high temperature molten pool; 10. an ash spraying area; 11. a molten iron inlet; 12. a molten iron outlet; 13. a closing step; 14. a slag outlet; 2. a dust suppression cover; 21. a spray gun fixing port; 22. a dust removal port; 23. a viewing port; 3. a slag wall; 4. a spray gun.
Detailed Description
The total iron content in the blast furnace dust is about 50 percent and is mostly Fe 2 O 3 Is present in the form of a blast furnace main product molten iron (C in the molten bath)]Saturation, around 4.3%), the physical heat of the bath averaged 1510 ℃. Fe 2 O 3 The FeO entering the molten pool exists in the form of FeO, and the FeO entering the molten pool is added into iron [ C]And [ Si]Reduced and removed dust consumes part of heat while it is heated from normal temperature to bath temperature]And [ Si ]]The oxidation reaction of the slag can release a large amount of heat, about 16-18% of C powder is also contained in the dedusting ash, part of heat can be released by the combustion of the C powder, and certain heat-preservation slag can be generated to float on the surface of molten iron in the process of melting the whole iron in a molten pool so as to play a role in protecting physical heat;
however, the density of molten iron is about 7.0g/cm in view of high temperature 3 The slag density is about 2.0g/cm 3 Dust density 2.0g/cm 3 Therefore, the upper surface of the high-temperature molten pool in the main channel is mainly high-temperature molten slag, and if the dedusting ash is directly sprayed, most of the dedusting ash enters the slag channel along with the molten slag due to the fact that the dedusting ash is close to the molten slag in density, and iron elements are wasted.
In addition, the process of melting all iron in the fly ash into a molten pool can generate certain amount of (SiO) by some physical and chemical reactions 2 ) And CO (g), which is easy to generate foam slag to prevent newly sprayed dedusting ash from contacting with the surface of molten iron.
On the basis of the problems needing to be solved, the inventor provides a resource utilization method of the blast furnace system dedusting ash through innovative design and a great deal of improvement, which comprises the steps of arranging a slag blocking wall 3 at the upper part of a molten iron runner, arranging a slag outlet 14 at one side of the slag blocking wall 3 close to molten iron, blocking the slag on the upper surface of the molten iron by using the slag blocking wall 3, and discharging the molten iron runner through the slag outlet 14; a spray gun 4 is arranged above one side of the slag blocking wall 3, which is far away from the slag outlet 14, dust is sprayed on the upper surface of molten iron from which slag is removed, and the cross-sectional area of a molten iron runner is reduced on one side, which is far away from the slag blocking wall 3, below the spray gun 4, so that the flow velocity of the molten iron sprayed with the dust is accelerated.
In order to reduce gas retention generated by reaction after ash spraying and generation of a large amount of foam slag, the solid-gas ratio of the dust removal ash conveyed in the spray gun 4 to the compressed air is controlled to be 35-40 kg/kg, and by adopting the dense phase conveying mode, the ash spraying flow speed is low, and the generation of the foam slag can also be reduced; furthermore, an included angle between the spraying direction of the spray gun 4 and the flow direction of the molten iron is preferably an acute angle so as to increase the contact surface area of the dust removal ash and the molten iron and reduce gas retention and foam slag generation;
furthermore, a dust suppression cover 2 is arranged above the spray gun 4, the upper part of a violent reaction area is covered, a dust removal opening 22 is formed in the dust suppression cover 2 and is connected with iron yard dust removal equipment, and through connection of the dust removal equipment, not only can the phenomenon that foam slag generated due to gas retention is prevented from contacting with dust removal ash to the maximum extent, but also the working environment can be optimized, and the effect of killing two birds with one stone is achieved.
Referring to fig. 1 and 2, correspondingly, the inventor also provides an apparatus for the above method, which includes a trough-shaped high-temperature molten pool 1, wherein both ends of the trough-shaped high-temperature molten pool 1 are respectively provided with a molten iron inlet 11 and a molten iron outlet 12, the molten iron inlet 11 can be directly connected to a molten iron main channel, the molten iron outlet 12 can be connected to a molten iron channel, the molten iron channel is connected to a molten iron tank, the middle part of the high-temperature molten pool 1 is an ash injection zone 10, a spray gun 4 is arranged above the ash injection zone 10, a slag wall 3 is arranged at the upper part between the ash injection zone 10 and the molten iron inlet 11, both ends of the slag wall 3 are respectively fixedly connected with the inner walls at both sides of the high-temperature molten pool 1, and a slag outlet 14 is arranged at one side of the slag wall 3 close to the molten iron inlet 11; a closing-in step 13 is arranged at the bottom between the molten iron outlet 12 and the ash spraying area 10, the structural form of the closing-in step 13 can be a rectangle shown in the figure, and can also be a wedge shape or an arc shape, and the like, as long as the sectional area of the runner can be reduced; the materials of the high-temperature molten pool 1, the slag wall 3 and the closing-up step 13 are all consistent with that of the main molten iron trough.
In a preferred embodiment, the upper end of the high-temperature bath 1 is also provided with a dust suppression cover 2, the dust suppression cover 2 covering at least above the dust injection zone 10.
As shown in fig. 1 and 2, a spray gun fixing port 21 may be formed on the dust suppression cover 2 for positioning the spray gun 4, and an ash outlet of the spray gun 4 passes through the spray gun fixing port 21 and is disposed below the dust suppression cover 2, so that when adjustment is required, the spray gun 4 may be inserted or pulled out inwards to adjust the height, the head of the spray gun may be bent to adjust the ash spraying direction, and a more precise spray gun 4 position adjusting device, such as a high temperature resistant manipulator, may be mounted on the spray gun fixing port 21.
Referring to fig. 1, the dust suppressing cover 2 is provided with a dust removing opening 22 above the dust spraying area 10 for connecting a dust removing device, and preferably, the dust removing opening 22 can be provided on the side surface of the dust suppressing cover 2.
In a preferred embodiment, the dust suppression cover 2 covers the whole high-temperature molten pool 1, and an observation port 23 is arranged at one side of the dust suppression cover 2, which is close to the molten iron inlet 11, of the ash spraying area 10 and is used for observing the position and the orientation of an ash outlet of the spray gun 4 so as to be adjusted; in addition, the shape of the dust suppression cover 2 can also be designed into a mode as shown in FIGS. 1 and 2, a spray gun 4 is arranged at an inclined position, and the ash is sprayed obliquely to increase the contact area of the ash and molten iron;
in addition, in order to further increase the contact area between the ash injection and the molten iron, the molten iron runner, namely the high-temperature molten pool 1 of the device is preferably a transition area between a main molten iron ditch and a branch molten iron ditch, and a molten iron inlet 11 and a molten iron outlet 12 are respectively connected with the main molten iron ditch and the branch molten iron ditch, so that the arranged space is dozens of times larger than the ash injection in the main ditch, and relative to the main molten iron ditch, the high-temperature molten pool 1 is a semi-closed area, and under the covering of a dust suppression cover 2, the upper part and the periphery of the high-temperature molten pool are both spaces surrounded by steel shells with linings, thus not only ensuring sufficient reaction, but also not causing larger raised dust, and after slag is removed and ash injection is carried out, the newly generated floating objects on the surface of the molten iron can also play a role in molten iron heat preservation, thereby achieving the purposes of low carbon and environmental protection; and if the swing spout (the molten iron of a supporting iron hook flows into the swing spout and then is poured into the molten iron tank by the swing spout) mentioned in the background technology is sprayed with ash, the problems of semi-closure, insufficient space and the like are difficult to achieve, and because the space is an area for monitoring the liquid level of the molten iron tank by a worker in front of the furnace, after the molten iron tank is full, the worker needs to change the outlet of the swing spout into another empty tank for continuous operation, and the ash spraying process in the area can generate a large amount of dense smoke, thereby influencing the sight of the worker and polluting the working environment, and causing potential safety and environmental protection hazards.
The spray gun can adopt a 310S high-temperature spray gun with the diameter of 27x 3.5.
The high-temperature mixture of the blast furnace main product molten iron and the molten slag enters a high-temperature molten pool through a molten iron inlet, and the molten slag flows out of the high-temperature molten pool through a molten slag outlet under the action of a slag-stopping wall and enters a slag runner; the high-temperature mixture of the molten iron and the molten slag is blocked by the slag blocking wall and enters the ash spraying area through the lower part of the slag blocking wall; in the area, blast furnace dust removal mixed compressed air is conveyed to the surface of a high-temperature molten pool by a dense phase through a spray gun, and rapidly spreads on the surface to participate in violent physical and chemical reactions, and the action surface can be observed at an observation port and the position of the action surface can be adjusted through a spray gun fixing device so as to reach an optimal station; the molten iron sprayed with the dedusting ash is turbulent when flowing through the closing-up step, the flow rate is accelerated, the mixing is accelerated, finally the molten iron enters the iron runner through the molten iron outlet, and finally enters the molten iron tank through the iron runner, and the process still continuously reacts, so that the reaction is more sufficient.
By adopting the device, the problem that the iron element is wasted due to the fact that the dust removal ash is blocked by the molten slag is solved, the ash spraying area below the spray gun is wide and free of blocking, the dust removal device is connected with the dust removal opening, the gas retention and the foam slag can be reduced to the maximum extent, the dust removal ash is spontaneously mixed and uniformly mixed by the molten iron through the ingenious closing-up design, the blast furnace dust removal ash can be conveniently and efficiently utilized, and the improvement of the quality of the molten iron is facilitated.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
The details of the present invention are not described in detail, but are known to those skilled in the art.
Claims (10)
1. A resource utilization method for dedusting ash of a blast furnace system is characterized by comprising the following steps: the method comprises the steps that a slag blocking wall (3) is arranged at the upper part of a molten iron runner, a slag outlet (14) is formed in one side, close to molten iron, of the slag blocking wall (3) in the opposite direction, the slag on the upper surface of the molten iron is blocked by the slag blocking wall (3), and the molten iron runner is discharged through the slag outlet (14); a spray gun (4) is arranged above one side of the slag blocking wall (3) far away from the slag outlet (14), dust is sprayed on the upper surface of molten iron from which slag is removed, and the cross-sectional area of a molten iron runner is reduced on one side of the lower part of the spray gun (4) far away from the slag blocking wall (3), so that the flow speed of the molten iron sprayed with the dust is accelerated.
2. The resource utilization method of blast furnace system fly ash according to claim 1, characterized in that: the solid-gas ratio of the dust removed and the compressed air conveyed in the spray gun (4) is controlled to be 35-40 kg/kg.
3. The resource utilization method of blast furnace system fly ash according to claim 1, characterized in that: a dust suppression cover (2) is arranged above the spray gun (4) and covers the upper part of the violent reaction area, and a dust removal opening (22) is formed in the dust suppression cover (2) and connected with iron field dust removal equipment.
4. The resource utilization method of blast furnace system fly ash according to claim 1, characterized in that: and the included angle between the spraying direction of the spray gun (4) and the flow direction of the molten iron is an acute angle.
5. The device for the resource utilization method of the blast furnace system fly ash according to any one of claims 1 to 4, which is characterized in that: the device comprises a groove-shaped high-temperature molten pool (1), wherein a molten iron inlet (11) and a molten iron outlet (12) are respectively formed in two ends of the groove-shaped high-temperature molten pool (1), an ash spraying area (10) is arranged in the middle of the high-temperature molten pool (1), a spray gun (4) is arranged above the ash spraying area, a slag blocking wall (3) is arranged on the upper portion between the ash spraying area (10) and the molten iron inlet (11), two ends of the slag blocking wall (3) are respectively and fixedly connected with the inner walls of two sides of the high-temperature molten pool (1), and a molten slag outlet (14) is formed in one side wall of the high-temperature molten pool (1) which is located at one side of the slag blocking wall (3) close to the molten iron inlet (11); a closing-in step (13) is arranged at the bottom between the molten iron outlet (12) and the ash spraying area (10).
6. The apparatus of claim 5, wherein: the upper end of the high-temperature molten pool (1) is also provided with a dust suppression cover (2), and the dust suppression cover (2) at least covers the upper part of the ash spraying area (10).
7. The apparatus of claim 6, wherein: a spray gun fixing port (21) is formed in the dust suppression cover (2) and used for positioning the spray gun (4), and a dust outlet of the spray gun (4) penetrates through the spray gun fixing port (21) and is arranged below the dust suppression cover (2).
8. The apparatus of claim 6, wherein: and a dust removal opening (22) is formed in the position, above the dust spraying area (10), of the dust suppression cover (2) and is used for being connected with dust removal equipment.
9. The apparatus of claim 7, wherein: the dust suppression cover (2) covers the whole high-temperature molten pool (1), and an observation port (23) is formed in one side, close to the molten iron inlet (11), of the dust suppression cover (2) in the ash spraying area (10) and used for observing the position and the orientation of an ash outlet of the spray gun (4) so as to be convenient to adjust.
10. The apparatus of claim 5, wherein: the high-temperature molten pool (1) is positioned in a transition region of the main molten iron runner and the branch molten iron runner, and the molten iron inlet (11) and the molten iron outlet (12) are respectively connected with the main molten iron runner and the branch molten iron runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210570734.8A CN115044717A (en) | 2022-05-24 | 2022-05-24 | Blast furnace system fly ash resource utilization method and device |
Applications Claiming Priority (1)
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| KR850700258A (en) * | 1984-02-04 | 1985-12-26 | 원본 미기재 | Method for adjusting the composition of the molten iron out of the blast furnace |
| CN2661699Y (en) * | 2003-07-22 | 2004-12-08 | 承德新新钒钛股份有限公司 | Continuous desulphurization equipment for blast furnace liquid iron |
| CN201381331Y (en) * | 2009-03-26 | 2010-01-13 | 中钢集团洛阳耐火材料研究院有限公司 | Replaceable compound skimmer for iron storing main runner ditch |
| CN107541575A (en) * | 2016-06-29 | 2018-01-05 | 宝山钢铁股份有限公司 | A kind of blast furnace dedusting ash retracting device and method |
| CN110306003A (en) * | 2019-06-26 | 2019-10-08 | 陕西龙门钢铁有限责任公司 | Cast house totally enclosed type dust excluding hood before a kind of State of Blast Furnace |
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2022
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR850700258A (en) * | 1984-02-04 | 1985-12-26 | 원본 미기재 | Method for adjusting the composition of the molten iron out of the blast furnace |
| CN2661699Y (en) * | 2003-07-22 | 2004-12-08 | 承德新新钒钛股份有限公司 | Continuous desulphurization equipment for blast furnace liquid iron |
| CN201381331Y (en) * | 2009-03-26 | 2010-01-13 | 中钢集团洛阳耐火材料研究院有限公司 | Replaceable compound skimmer for iron storing main runner ditch |
| CN107541575A (en) * | 2016-06-29 | 2018-01-05 | 宝山钢铁股份有限公司 | A kind of blast furnace dedusting ash retracting device and method |
| CN110306003A (en) * | 2019-06-26 | 2019-10-08 | 陕西龙门钢铁有限责任公司 | Cast house totally enclosed type dust excluding hood before a kind of State of Blast Furnace |
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