CN114410858A - Comprehensive treatment system and method for molten liquid slag - Google Patents
Comprehensive treatment system and method for molten liquid slag Download PDFInfo
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- CN114410858A CN114410858A CN202210246075.2A CN202210246075A CN114410858A CN 114410858 A CN114410858 A CN 114410858A CN 202210246075 A CN202210246075 A CN 202210246075A CN 114410858 A CN114410858 A CN 114410858A
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- 239000002893 slag Substances 0.000 title claims abstract description 232
- 239000007788 liquid Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 122
- 238000010791 quenching Methods 0.000 claims abstract description 90
- 230000000171 quenching effect Effects 0.000 claims abstract description 88
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 238000004080 punching Methods 0.000 claims abstract description 33
- 238000010891 electric arc Methods 0.000 claims abstract description 29
- 238000002347 injection Methods 0.000 claims abstract description 12
- 239000007924 injection Substances 0.000 claims abstract description 12
- 238000011010 flushing procedure Methods 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 6
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 238000003672 processing method Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 11
- 238000005422 blasting Methods 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 229910001341 Crude steel Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000004401 flow injection analysis Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
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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
-
- 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
- C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/04—Specific shape of slag after cooling
-
- 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
- C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag
-
- 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
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/07—Receptacle features where the slag is treated open to atmosphere
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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
- C21B2400/066—Receptacle features where the slag is treated
- C21B2400/072—Tanks to collect the slag, e.g. water tank
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Abstract
The invention provides a comprehensive treatment system and method for molten liquid slag, and relates to the technical field of electric arc furnace slag treatment. The system comprises a swing chute, a water slag channel, a granulating mechanism and a dehydrator, wherein a chute slag outlet is formed in the swing chute, one end of the water slag channel is connected to the position under the chute slag outlet, the other end of the water slag channel is connected with the dehydrator, one end, connected with the swing chute, in the water slag channel is connected with the granulating mechanism, the granulating mechanism comprises a wind quenching box and a water quenching punching box, the water quenching punching box is arranged below the wind quenching box, one surface, facing the dehydrator, of the wind quenching box is connected with a compressed air nozzle and/or an air injection plug, and one surface, facing the dehydrator, of the water quenching punching box is connected with a water nozzle and/or a water injection plug. In the granulating process, the slag flow is firstly subjected to air quenching to be made into large blocks, and then is further granulated through water quenching, so that the blasting phenomenon in the water quenching process due to the over-thick slag layer of the slag is prevented, and the granulating process is safer.
Description
Technical Field
The invention relates to the technical field of electric arc furnace slag treatment, in particular to a molten liquid slag comprehensive treatment system and a molten liquid slag comprehensive treatment method.
Background
The crude steel production in the world in recent years is 16-18 hundred million tons, wherein the steel in an electric arc furnace is 4 hundred million tons and accounts for about 25 percent. Except China, the proportion of the electric arc furnace steel in the global steel industry is more than 40 percent. In 2020, the yield of crude steel in China is 10.53 million tons, wherein the crude steel of an electric arc furnace is about 0.96 million tons accounting for 9 percent, and as far as 2020, China has about 420 electric arc furnaces with the capacity of more than 30 tons and 18225 million tons. The electric arc furnace generates about 1/30 solid wastes, so that if the amount of electric arc furnace slag is not comprehensively utilized, not only the environmental pollution is caused, but also more resources are wasted.
In the prior art, arc furnace slag is treated by adopting a water quenching mode, but in the slag water quenching process, because the slag has certain viscosity and the slag flowing layer is too thick, when water is involved in the molten liquid slag or the water is positioned below the continuous slag layer, a plurality of closed systems can be formed, and the pressure in the systems can be increased sharply along with the heat exchange between the water and the slag, so that severe explosion is generated, the phenomenon of blasting is generated, and potential safety hazards exist.
Disclosure of Invention
In view of the above, the present invention is directed to a system and a method for comprehensive treatment of molten liquid slag to solve the above problems.
Based on the above object, the present invention provides a molten liquid slag comprehensive treatment system, comprising: the device comprises a swing chute, a water slag channel, a granulating mechanism and a dehydrator; the swing chute is provided with a chute slag hole, one end of the water slag channel is connected under the chute slag hole, the other end of the water slag channel is connected with the dehydrator, one end of the water slag channel, which is connected with the swing chute, is connected with a granulating mechanism, the granulating mechanism comprises a wind quenching box and a water quenching punching box, the water quenching punching box is arranged under the wind quenching box, one surface of the wind quenching box, which faces the dehydrator, is connected with a compressed air nozzle and/or an air injection plug, and one surface of the water quenching punching box, which faces the dehydrator, is connected with a water nozzle and/or a water injection plug.
Furthermore, the device also comprises a slag pot, wherein the slag pot is arranged on one side of the swinging chute, and a tipping mechanism is connected below the slag pot; the tipping mechanism is activated to enable the slag in the slag tank to be poured out.
Further, a swing mechanism is connected below the swing chute; the swing mechanism drives the swing chute to rotate, so that the swing chute can be connected with the slag pot.
Furthermore, a connected slag ditch lining is arranged in the slag ditch; the quantity of the lining of the slag runner is selected according to the use condition, so that the installation and the replacement are convenient.
Furthermore, the swing chute and the horizontal plane form an included angle of fifty degrees, and one end of the swing chute connected with the slag runner is in a semi-funnel shape; the slag in the swing chute can flow into the slag ditch under the action of gravity.
A comprehensive treatment method of molten liquid slag comprises the following steps:
s1, starting an electric arc furnace slag tapping system, an air quenching box, a water quenching punching box and a dehydrator, and enabling molten liquid slag to flow into a water slag ditch from the electric arc furnace through a swinging chute;
s2, enabling the molten liquid slag to sequentially pass through high-speed compressed air flow sprayed by an air quenching box and pressure water sprayed by a water quenching flushing box, scattering and granulating the molten liquid slag, solidifying the molten liquid slag into granulated slag and flowing the granulated slag into a dehydrator along with the pressure water;
s3, filtering the water-containing granulated slag by a dehydrator to obtain finished slag, discharging the finished slag, and conveying the finished slag to a storage bin or a slag yard by a belt conveyor;
and S4, when the slag amount is too large, the air quenching tank runs in an overload mode, the water quenching flushing tank runs in an overload mode or the system fails, starting the swing mechanism to enable the swing chute to rotate to be connected with the slag pot, closing the air quenching tank, the water quenching flushing tank and the dehydrator at the same time, enabling molten liquid slag to flow into the slag pot from the electric arc furnace through the swing chute, drawing the slag pot to the slag field, starting the tipping mechanism to dump the electric arc slag in the slag pot, dumping the electric arc slag in the slag pot to carry out hot splashing slag granulation, and spraying water into the slag field to carry out dust reduction and temperature reduction.
Compared with the prior art, the invention has the beneficial effects that: when the molten slag flows into a water slag channel from an electric arc furnace through a swinging chute, the molten slag is firstly sprayed into relatively small granular or bulk slag through compressed air sprayed from an air quenching box, and then is further torn by pressure water sprayed from a water quenching punching box, the small granular or bulk slag is broken due to the impact of the pressure water and stress concentration generated by rapid cooling shrinkage when meeting water, and the small granular or bulk slag is rapidly solidified through heat exchange in the processes of air quenching and water quenching. The slag flow is firstly processed by air quenching to make the slag flow large and small in the granulation process, and then is further granulated by water quenching, so that the phenomenon of blasting in the direct water quenching process due to the fact that the slag layer of the slag is too thick is prevented, and the granulation process is safer. The quantity of the air injection plugs and the water injection plugs is adjusted to adjust the pressure and the flow of the injected compressed air and the flushing water, and then the finished product slag which is uniform in particle, free of blocky slag and good in color is produced through treatment.
Drawings
FIG. 1 is a schematic structural diagram of an integrated molten liquid slag treatment system according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a swing chute of the molten liquid slag integrated-processing system according to the embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a slag runner of the integrated molten liquid slag handling system according to an embodiment of the present invention;
FIG. 4 is a schematic view of the cross-sectional structure A-A of FIG. 1;
FIG. 5 is a schematic structural diagram of a wind quenching tank of the integrated molten liquid slag treatment system according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a water quenching and punching tank of the integrated molten liquid slag treatment system according to an embodiment of the present invention;
FIG. 7 is a schematic structural view of a dehydrator of the integrated molten liquid slag handling system according to an embodiment of the present invention;
fig. 8 is a schematic structural view of a slag pot of the integrated molten liquid slag processing system according to the embodiment of the present invention.
Description of the drawings are labeled: 1. an electric arc furnace; 11. an electric arc furnace slag outlet; 2. swinging the chute; 21. a chute body; 211. a chute slag inlet; 212. a chute slag outlet; 22. a swing mechanism; 3. a water slag ditch; 31. a slag inlet end of the slag runner; 32. lining the slag runner; 4. a granulating mechanism; 41. a wind quenching box; 411. an air inlet of the air quenching tank; 412. a compressed air nozzle; 413. air injection plugging; 42. water quenching and punching box; 421. a water inlet of the water quenching punching box; 422. a water nozzle; 423. water spraying and plugging; 5. a dehydrator; 51. a slag inlet of the dehydrator; 52. a slag outlet of the dehydrator; 6. a slag pot; 61. a slag tank body; 62. a tipping mechanism.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to specific embodiments below.
As shown in figure 1, the comprehensive molten liquid slag treatment system provided by the invention comprises a swing chute 2, a slag runner 3, a granulating mechanism 4, a dehydrator 5 and the like. As shown in fig. 2, the swing chute 2 is composed of a chute body 21, a chute slag inlet 211 and a chute slag outlet 212, and the electric arc furnace slag outlet 11 is connected with the chute slag inlet 211 of the swing chute 2. The swing chute 2 and the horizontal direction form an included angle of fifty degrees, so that the slag flows from the swing chute 2 to the slag runner 3 under the action of gravity. The width of the chute slag inlet 211 is equal to the width of the chute body 21, and the opening width of the chute slag outlet 212 is gradually narrowed to form a semi-funnel shape. The chute slag outlet 212 is connected with the slag inlet end 31 of the water slag channel, and the slag outlet end of the water slag channel 3 is connected with a dehydrator 5. High-temperature molten liquid slag generated in the slag smelting process of the electric arc furnace 1 flows into the swing chute 2 through the chute slag inlet 211 and then flows to the slag runner 3 through the chute slag outlet 212 for processing.
The swing mechanism 22 is connected under the gravity center of the chute body 21, the swing mechanism 22 includes but is not limited to motor drive, cylinder drive and electro-hydraulic push rod drive, here, the cylinder drive is taken as an example, one end of the cylinder is fixedly connected with the swing chute 2, the other end of the cylinder is hinged with the cylinder seat, and the cylinder drives the swing chute 2 to rotate when extending. A slag pot 6 is arranged beside the swing chute 2, and the swing mechanism 22 can drive the chute body 21 to rotate, so that the chute slag outlet 212 is moved away from the upper part of the slag runner 3, turns to the slag pot 6 and is connected with the slag pot 6. As shown in fig. 8, the slag pot 6 is composed of a slag pot 61 and a tilting mechanism 62, the slag pot 61 is bowl-shaped, and the tilting mechanism 62 is connected below the slag pot 61. Here, the tilting mechanism 62 takes an oil cylinder as an example, the bottom of the slag pot 6 is connected with a slag pot support in a locking manner, one end of the oil cylinder is hinged with the slag pot support, the other end of the oil cylinder is hinged with an oil cylinder base, and when the oil cylinder extends, the slag pot support is driven to rotate along a fixed point to lift the slag pot 6 for dumping.
The slag runner 3 is obliquely arranged at a certain gradient, the gradient of the slag runner is determined according to the actual layout of the electric arc furnace 1 and other equipment on site, the slag inlet end 31 of the slag runner is the highest point, and the slag outlet end is the lowest point, so that the slag in the slag runner 3 continuously flows to the slag outlet end under the action of gravity. As shown in fig. 3, a plurality of connected inside liners 32 are installed in the inner wall of the slag runner 3, so as to enhance the wear resistance of the slag runner 3, the length and number of the inside liners 32 are determined according to the actual use condition, and the use of the multiple sections of the inside liners 32 is convenient for installation, transportation and replacement.
A granulating mechanism 4 is arranged below the slag inlet end 31 of the water slag channel, and as shown in fig. 4, the granulating mechanism 4 consists of an air quenching tank 41 and a water quenching punching tank 42. The water quenching punching box 42 is positioned below the air quenching box 41, and the air quenching box 41 and the water quenching punching box 42 are positioned on the same vertical section. As shown in fig. 5, the air quenching box 41 is a polygonal shell, and both ends of the air quenching box 41 are respectively connected with a steel pipe or a flange to form an air inlet 411 of the air quenching box. Here, the two ends of the air quenching box 41 are connected with steel pipes, the port of each steel pipe is connected with a flange for connecting with a fan, air is introduced into the air quenching box 41, and the rated compressed air flow of the air inlet 411 of the air quenching box is about 85-100 m3And/min, the rated punching air pressure in the air inlet 411 of the air quenching box is about 0.7-0.8 MPa. The air quenching box 41 is provided with a plurality of through holes distributed at equal intervals on one surface facing the dehydrator 5, the through holes are connected with compressed air nozzles 412 or air injection plugs 413, the connection modes include but are not limited to threaded connection, interference fit and welding, here, the threaded connection is taken as an example, and the types and the number of the compressed air nozzles 412 and the air injection plugs 413 can be determined according to the use requirements. The number of the compressed air nozzles 412 is multiple, and under the condition that part of the compressed air nozzles 412 are blocked or damaged due to long-term use, compressed air flow can be sprayed out from other compressed air nozzles 412 to continue working, so that the influence on production caused by damage of single air flow spraying is avoided, and the smooth proceeding of production is further ensured. The air quenching tank 41 can be adjusted according to actual conditions on site, the compressed air nozzles 412 are taken down and then the air injection plugs 413 are installed, and then under the condition that the air inflow at the air inlet 411 of the air quenching tank is fixed, the flow and the pressure of the ejected compressed air are adjusted by adjusting the number of the compressed air nozzles 412 to adapt to the actual conditions on siteThe use condition is met, thereby achieving better air quenching and granulating effect.
As shown in fig. 6, the water quenching and punching tank 42 is in the shape of an irregular polygon, and one end of the water quenching and punching tank is connected with a steel pipe or a flange to form a water inlet 421 of the water quenching and punching tank. The rated punching water flow in the water inlet 421 of the water quenching punching box is about 1000m3And h, rated punching water pressure in the water inlet 421 of the water quenching punching box is more than or equal to 0.9MPa, and when the slag of the electric arc furnace 1 is granulated by punching water, the slag-water ratio is 1: 3-1: 10. The water quenching punching box 42 is provided with a plurality of uniformly distributed through holes on one surface facing the dehydrator 5, the through holes are connected with water nozzles 422 or water spraying plugs 423 in a connection mode including but not limited to threaded connection, interference fit and welding, here, the threaded connection is taken as an example, and the types and the number of the water nozzles 422 and the water spraying plugs 423 can be determined according to actual conditions. The number of the water nozzles 422 is multiple, and under the condition that part of the water nozzles 422 are blocked or damaged due to long-term use, water flow can be sprayed out from other water nozzles 422 to continue working, so that influence on production caused by damage of single water flow injection is prevented, and smooth production is guaranteed. The water quenching and flushing box 42 can be adjusted according to actual conditions on site, the water spray plugs 423 are installed after the water nozzles 422 are taken down, and then under the condition that the water inflow of the water quenching and flushing box 42 is certain, the flow and the pressure of the sprayed flushing water are adjusted by adjusting the number of the water nozzles 422 to adapt to the conditions of site use, so that a better water quenching and granulating effect is achieved.
The dehydrator 5 is connected to the granulated slag runner 3, as shown in fig. 7, the dehydrator 5 receives the water-containing granulated slag from the granulated slag runner 3 through a dehydrator slag inlet 51, rotates the water-containing granulated slag in the dehydrator 5 by a rotary drum to generate centrifugal force, filters the water-containing granulated slag through a screen in the dehydrator 5, and discharges the produced finished slag with low water content through a dehydrator slag outlet 52.
The comprehensive treatment method of the molten liquid slag is characterized by comprising the following steps:
s1, starting a slag tapping system of the electric arc furnace 1, the air quenching box 41, the water quenching punching box 42 and the dehydrator 5, wherein the liquid molten slag flows into the swing chute 2 from the electric arc furnace 1 and flows into the slag ditch 3 through the swing chute 2.
S2, the liquid molten slag flows down from above the granulating mechanism 4, and passes through the air-quench box 41 and the water-quench punching box 42 in this order. The air quenching tank 41 can jet compressed air, the water quenching punching tank 42 jets pressure water, and the liquid molten slag is torn and crushed by the high-speed compressed air flow of the air quenching tank 41 and is formed into liquid small particles under the impact crushing of the pressure water of the water quenching punching tank 42. The compressed air and the pressure water can not only break up and granulate the liquid molten slag, but also carry away the heat of the liquid molten slag particles through heat exchange in the process, so that the liquid molten slag particles are rapidly solidified into solid particles and flow into the slag runner 3 along with the pressure water.
S3, the water slag channel 3 has a certain gradient, the lower end of the horizontal height is connected with a dehydrator 5, at this time, the water-containing solid granulated slag enters the dehydrator 5 along the gradient, and the finished slag with low water content is filtered to be discharged through a dehydrator slag outlet 52 and then conveyed to a storage bin or a slag yard through a belt conveyor.
And S4, when the slag amount is too large, the air quenching and water quenching overload operation is performed or the fault occurs, the swing mechanism 22 is started, the air quenching box 41, the water quenching punching box 42 and the dehydrator 5 are closed, and the swing chute 2 rotates at a certain angle and then is connected with the slag melting tank 6. The slag discharging system of the electric arc furnace 1 is started, molten slag enters the molten slag tank 6 from the swing chute 2, the molten slag tank 6 is dragged to a slag yard by a tractor after being filled with liquid molten slag, the tilting mechanism 62 is started, the molten slag tank body 61 is tilted along a certain angle, the slag of the electric arc furnace 1 in the molten slag tank body 61 is poured out, hot splashing molten slag granulation is carried out in the slag yard in a splashing mode, and water is sprayed into the slag yard in the hot splashing process for dust fall and temperature reduction. The slag is temporarily stored for hot splashing through the slag pot 6, so that the production is prevented from being influenced by shutdown when a fault occurs.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (6)
1. An integrated molten liquid slag handling system comprising: the device comprises a swing chute, a water slag channel, a granulating mechanism and a dehydrator; it is characterized in that the preparation method is characterized in that,
the swing chute is provided with a chute slag hole, one end of the water slag channel is connected under the chute slag hole, the other end of the water slag channel is connected with the dehydrator, one end of the water slag channel, which is connected with the swing chute, is connected with a granulating mechanism, the granulating mechanism comprises a wind quenching box and a water quenching punching box, the water quenching punching box is arranged under the wind quenching box, one surface of the wind quenching box, which faces the dehydrator, is connected with a compressed air nozzle and/or an air injection plug, and one surface of the water quenching punching box, which faces the dehydrator, is connected with a water nozzle and/or a water injection plug.
2. The molten liquid slag integrated processing system according to claim 1, further comprising a slag pot, the slag pot being installed at one side of the swing chute, and a tilting mechanism being connected below the slag pot.
3. The molten liquid slag integrated processing system according to claim 1, wherein a swing mechanism is connected below the swing chute.
4. The molten liquid slag integrated processing system according to claim 1, wherein an associated slag runner lining is provided in the slag runner.
5. The molten liquid slag comprehensive treatment system according to claim 1, wherein the swing chute forms an included angle of fifty degrees with the horizontal plane, and one end of the swing chute connected with the slag runner is shaped like a half funnel.
6. A molten liquid slag integrated-processing method using the molten liquid slag integrated-processing system according to any one of claims 1 to 5, characterized by comprising the steps of:
s1, starting an electric arc furnace slag tapping system, an air quenching box, a water quenching punching box and a dehydrator, and enabling molten liquid slag to flow into a water slag ditch from the electric arc furnace through a swinging chute;
s2, enabling the molten liquid slag to sequentially pass through compressed air flow sprayed by an air quenching box and pressure water sprayed by a water quenching flushing box, scattering and granulating the molten liquid slag, solidifying the molten liquid slag into granulated slag and flowing the granulated slag into a dehydrator along with the pressure water;
s3, filtering the water-containing granulated slag by a dehydrator to obtain finished slag, discharging the finished slag, and conveying the finished slag to a storage bin or a slag yard by a belt conveyor;
and S4, when the slag amount is too large, the air quenching tank runs in an overload mode, the water quenching flushing tank runs in an overload mode or the system fails, starting the swing mechanism to enable the swing chute to rotate to be connected with the slag pot, closing the air quenching tank, the water quenching flushing tank and the dehydrator at the same time, enabling molten liquid slag to flow into the slag pot from the electric arc furnace through the swing chute, drawing the slag pot to the slag field, starting the tipping mechanism to dump the electric arc slag in the slag pot, dumping the electric arc slag in the slag pot to carry out hot splashing slag granulation, and spraying water into the slag field to carry out dust reduction and temperature reduction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210246075.2A CN114410858A (en) | 2022-03-14 | 2022-03-14 | Comprehensive treatment system and method for molten liquid slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210246075.2A CN114410858A (en) | 2022-03-14 | 2022-03-14 | Comprehensive treatment system and method for molten liquid slag |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114410858A true CN114410858A (en) | 2022-04-29 |
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