CN116083663A - Air quenching method steel slag treatment system - Google Patents

Air quenching method steel slag treatment system Download PDF

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Publication number
CN116083663A
CN116083663A CN202211726305.1A CN202211726305A CN116083663A CN 116083663 A CN116083663 A CN 116083663A CN 202211726305 A CN202211726305 A CN 202211726305A CN 116083663 A CN116083663 A CN 116083663A
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China
Prior art keywords
steel slag
slag
air
water tank
cold water
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CN202211726305.1A
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Chinese (zh)
Inventor
顾经伟
屈海博
赵丹丹
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Shanghai Meishan Industrial And Civil Engineering Design And Research Institute Co ltd
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Shanghai Meishan Industrial And Civil Engineering Design And Research Institute Co ltd
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Priority to CN202211726305.1A priority Critical patent/CN116083663A/en
Publication of CN116083663A publication Critical patent/CN116083663A/en
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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
    • 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
    • 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
    • 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 application relates to a steel slag treatment system by an air quenching method, which comprises a tundish, a granulator, a cold water tank and a chain bucket elevator; the tundish is used for receiving the liquid steel slag and discharging the liquid steel slag from a slag outlet; the air inlet of the granulator is connected with an air source station, the air outlet is opposite to the position right below the slag hole of the tundish, and the air source station is used for outputting compressed air mixed with atomized water so that liquid steel slag discharged from the slag hole of the tundish is granulated into fine particles and falls into a cold water tank; the cold water tank is positioned in front of the air outlet of the granulator; the chain bucket elevator is positioned in the cold water tank and used for dehydrating and taking out the solid steel slag in the cold water tank and conveying the solid steel slag to a designated position. According to the steel slag treatment system adopting the air quenching method, the atomized water vapor is mixed in the compressed air, so that the impact kinetic energy of air flow is increased, the liquid steel slag segmentation and granulation effects are better, the cooling and granulation of the liquid steel slag in the flight process are accelerated, the digestion reaction of f-CaO in the liquid steel slag can be promoted by the water vapor, and the unstable phase in the steel slag is eliminated as much as possible.

Description

Air quenching method steel slag treatment system
Technical Field
The application relates to the technical field of steel slag treatment, in particular to a steel slag treatment system by an air quenching method.
Background
The steel slag treatment is the most complex and large class in the existing metallurgical solid waste comprehensive utilization, and is the first difficult problem of solid waste treatment of iron and steel enterprises because of various steel slag types, huge volume, complex components and treatment procedures and great treatment difficulty.
In recent years, under the guidance of environmental protection, energy saving and sustainable development, the situation that the steel slag is applied to the aspects of building and the like is gradually opened, and the successful application of the steel slag micro powder technology opens up a way for the successful application of the high-efficiency utilization of tailings such as a wind quenching method, a hot disintegrating method and the like.
Taking an air quenching method as an example, compressed air is adopted to blow and spray molten steel slag, so that the steel slag is crushed by high-speed air flow to form fine slag particles, and the subsequent treatment is facilitated. The steel slag treatment mode of the air quenching method can avoid the danger of explosion and water pollution and can recover heat energy. However, although the air quenching method has a certain advantage in terms of safety, it is not effective in granulating and dividing the liquid steel slag.
Disclosure of Invention
Accordingly, in order to solve the above-mentioned problems, it is necessary to provide a steel slag treatment system by an air quenching method, which can divide and granulate liquid steel slag better.
A wind quenching method steel slag treatment system, comprising:
the tundish is used for receiving the liquid steel slag and discharging the liquid steel slag from a slag outlet;
the air inlet of the granulator is connected with an air source station, the air outlet of the granulator is opposite to the position right below the slag hole of the tundish, and the air source station is used for outputting compressed air mixed with atomized water so that liquid steel slag discharged from the slag hole of the tundish is granulated into fine particles and falls into a cold water tank;
the cold water tank is positioned in front of the air outlet of the granulator;
the chain bucket elevator is positioned in the cold water tank and used for dehydrating and taking out the solid steel slag in the cold water tank and conveying the solid steel slag to a designated position.
In one embodiment, the device further comprises a steam recovery pipeline, one end of the steam recovery pipeline is located above the cold water tank, and the other end of the steam recovery pipeline is connected with the dust remover.
In one embodiment, the device further comprises a safety box, wherein the bottom of the safety box is communicated and is positioned above the cold water tank, one side of the safety box is used for entering granulated steel slag, and the top of the safety zone is communicated with one end of the steam recovery pipeline.
In one embodiment, the top of the safety box is provided in a pyramid-shaped structure, and one end of the vapor recovery tube communicates with the top end of the pyramid-shaped structure.
In one embodiment, the cold water tank comprises a cooling area, the cooling area is integrally located below the safety box, the depth of one end of the cooling area, which is close to the granulator, is smaller than the depth of one end, which is far away from the granulator, of the cooling area, and the chain bucket elevator is located on one side, which is far away from the granulator, of the cooling area.
In one embodiment, the cold water tank further comprises a lifting area, the lifting area is located on one side, away from the granulator, of the cooling area, the depth of one end, close to the cooling area, of the lifting area is greater than the depth of one end, away from the cooling area, of the lifting area, and the chain bucket elevator is arranged in the lifting area along the inclination angle of the bottom surface of the lifting area.
In one embodiment, the lowest end of the lifting area is lower than the lowest end of the cooling area.
In one embodiment, the lowest end of the lifting area is located below the lowest end of the cooling area.
In one embodiment, the device further comprises a tilting device for tilting the slag pot filled with the liquid steel slag to the tundish, so that the liquid steel slag in the slag pot enters the tundish.
In one embodiment, the device further comprises a lifting device for lifting the slag pot filled with the liquid steel slag to the tipping device so that the tipping device can pour the liquid steel slag in the slag pot to the tundish.
According to the air quenching method steel slag treatment system, when the air quenching method steel slag treatment system is used, a slag tank filled with liquid steel slag is conveyed to a steel slag treatment workshop through a lifting device or a slag tank conveying device, then the liquid steel slag in the slag tank is poured into a tundish through a tipping device, the liquid steel slag flows out from a slag outlet of the tundish and passes through an air outlet of a granulator in the falling process, an air source station inputs compressed air mixed with atomized water to the granulator in the granulating process, the liquid steel slag passing through the air outlet of the granulator is blown and crushed into fine and uniform particles by the compressed air mixed with the atomized water, the liquid steel slag is rapidly cooled in the process and falls into a cold water tank, and finally the solid steel slag completely cooled in the cold water tank is dehydrated and taken out by a chain bucket elevator and conveyed to a designated position. According to the system, atomized water vapor is mixed in compressed air, so that the impact kinetic energy of air flow is increased, the liquid steel slag segmentation and granulation effects are better, meanwhile, the cooling and granulation of the liquid steel slag in the flight process are accelerated, the water vapor can promote the digestion reaction of f-CaO in the liquid steel slag, and unstable phases in the steel slag are eliminated as much as possible.
Drawings
FIG. 1 is a process flow diagram of a steel slag treatment system by an air quenching method according to an embodiment;
FIG. 2 is a schematic diagram of a steel slag treatment system by air quenching according to a first embodiment;
fig. 3 is a schematic structural diagram of a steel slag treatment system by air quenching according to a second embodiment.
In the figure: 110. a granulator; 121. a cooling area; 122. a lifting region; 130. chain bucket elevator; 140. a steam recovery pipe; 150. a safety box.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used in the description of the present application for purposes of illustration only and do not represent the only embodiment.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be a direct contact of the first feature with the second feature, or an indirect contact of the first feature with the second feature via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.
Unless defined otherwise, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The term "and/or" as used in the specification of this application includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 and 2, in one embodiment, a wind quenching process steel slag treatment system includes a tundish, a granulator 110, a cold water tank and a bucket elevator 130; the tundish is used for receiving the liquid steel slag and discharging the liquid steel slag from a slag outlet; the air inlet of the granulator 110 is connected with an air source station, the air outlet is opposite to the position right below the slag hole of the tundish, and the air source station is used for outputting compressed air mixed with atomized water so that liquid steel slag discharged from the slag hole of the tundish is granulated into fine particles and falls into a cold water tank; the cold water tank is positioned in front of the air outlet of the granulator 110; the chain bucket elevator 130 is positioned in the cold water tank and is used for dehydrating and taking out the solid steel slag in the cold water tank and conveying the solid steel slag to a designated position.
According to the air quenching method steel slag treatment system, when the air quenching method steel slag treatment system is used, a slag tank filled with liquid steel slag is conveyed to a steel slag treatment workshop through a lifting device or a slag tank conveying device, then the liquid steel slag in the slag tank is poured into a tundish through a tipping device, the liquid steel slag flows out from a slag outlet of the tundish and passes through an air outlet of a granulator 110 in the falling process, a gas source station inputs compressed gas mixed with atomized water to the granulator 110 in the granulating process, the liquid steel slag passing through the air outlet of the granulator 110 is blown and crushed into fine and uniform particles by the compressed gas mixed with the atomized water, the liquid steel slag is rapidly cooled in the process and falls into a cold water tank, and finally the solid steel slag completely cooled in the cold water tank is dehydrated and taken out by a chain bucket elevator 130 and conveyed to a designated position. According to the system, atomized water vapor is mixed in compressed air, so that the impact kinetic energy of air flow is increased, the liquid steel slag segmentation and granulation effects are better, meanwhile, the cooling and granulation of the liquid steel slag in the flight process are accelerated, the water vapor can promote the digestion reaction of f-CaO in the liquid steel slag, and unstable phases in the steel slag are eliminated as much as possible.
It should be noted that, the water in the cold water tank needs to exchange with the water in the circulating water tank after repeatedly cooling the steel slag so as to keep the water temperature suitable, and in addition, the cold water tank is also connected with the water supplementing device for keeping the water quantity of the cold water tank. The steel slag lifted by the chain bucket elevator 130 can be moved onto a belt conveyor through a collecting hopper, finally conveyed to a storage bin through a large-inclination-angle rubber belt conveyor, and loaded to specified equipment through an electric discharge valve.
In the embodiment, the device further comprises a tipping device and a lifting device, wherein the tipping device is used for tipping the slag pot filled with the liquid steel slag to the tundish, so that the liquid steel slag in the slag pot enters the tundish. The lifting device is used for lifting the slag tank filled with the liquid steel slag to the tipping device, so that the tipping device can tip the liquid steel slag in the slag tank to the tundish.
In this embodiment, the device further includes a steam recovery pipe 140, one end of the steam recovery pipe 140 is located above the cold water tank, and the other end is connected to the dust remover.
Specifically, when compressed air mixed with atomized water at the blowing position in the air outlet of the granulator 110 contacts with the liquid steel slag, steam and dust are generated between the compressed air and the liquid steel slag, and when the liquid steel slag falls into a cold water tank after being blown and crushed, a large amount of steam and dust are also generated, and at the moment, the steam and the dust are sucked by the steam recovery pipeline 140 in the rising process, wherein the dust can be sucked by the dust remover when moving to the other end of the steam recovery pipeline 140, so that the dust is prevented from being diffused into the external environment to cause pollution.
In this embodiment, the apparatus further includes a safety box 150, the bottom of the safety box 150 is through and is located above the cold water tank, one side of the safety box 150 is used for entering the granulated steel slag, and the top of the safety zone is communicated with one end of the steam recovery pipeline 140.
Specifically, the crushed liquid steel slag enters the safe box 150 and falls into the cold water tank within the range of the safe box 150, and the safe box 150 can prevent the crushed liquid steel slag from splashing into other external environments, so that the safety is better. The liquid steel slag generates a large amount of water vapor and dust when contacting the cold water tank, and the water vapor and dust are in the range of the safety box 150 after rising above the cold water tank, and can only enter the vapor recovery pipeline 140 along the safety box 150 and are finally absorbed by the dust remover.
As shown in fig. 3, in the present embodiment, the top of the safety box 150 is provided in a pyramid-shaped structure, and one end of the steam recovery pipe 140 communicates with the top end of the pyramid-shaped structure.
Specifically, the top of the safety box 150 may further adopt other structures with high middle and low periphery, so that water vapor and dust can enter the steam recovery pipeline 140 along the inclined top surface of the safety box 150 when ascending, and the entering process is smoother.
In this embodiment, the cold water tank includes a cooling area 121, the cooling area 121 is integrally located below the safety box 150, the depth of one end of the cooling area 121 close to the granulator 110 is smaller than the depth of one end far away from the granulator 110, and the bucket elevator 130 is located at one side of the cooling area 121 far away from the granulator 110.
Specifically, by setting the depth of one end of the cooling area 121 close to the granulator 110 to be smaller than the depth of the other end, the liquid steel slag can firstly contact with the water surface of one side of the cooling area 121 far away from the granulator 110 when entering the cooling area 121, and in addition, because the chain bucket elevator 130 is positioned on one side of the cooling area 121 far away from the granulator 110, the steel slag falling into the cooling area 121 finally falls into the chain bucket elevator 130, is dehydrated and taken out by the chain bucket elevator 130 and is transported to a designated position. Wherein the bottom of cooling zone 121 slope sets up can prevent to fall into the slag deposit of cold water pond motionless, can make the slag remove and assemble in a department along the bottom surface of cooling zone 121 slope, is convenient for follow-up taking out.
In this embodiment, the cold water tank further includes a lifting area 122, the lifting area 122 is located on one side of the cooling area 121 far away from the granulator 110, the depth of one end of the lifting area 122 near the cooling area 121 is greater than the depth of one end far away from the cooling area 121, and the chain bucket elevator 130 is disposed in the lifting area 122 along the inclination angle of the bottom surface of the lifting area 122.
Specifically, because the one end degree of depth that the lifting district 122 is close to cooling district 121 is greater than the degree of depth that keeps away from cooling district 121 one end, and lifting district 122 and cooling district 121 intercommunication, consequently can set up chain bucket elevator 130 along the lifting district 122 bottom surface of slope when safe chain bucket elevator 130, the installation is more convenient.
In this embodiment, the level of the lowest end of the lifting area 122 is lower than the level of the lowest end of the cooling area 121.
Specifically, the horizontal height of the lowest end of the lifting area 122 is set to be lower than the horizontal height of the lowest end of the cooling area 121, and the end of the lowest horizontal height of the lifting area 122 and the end of the lowest horizontal height of the cooling area 121 are mutually communicated, so that after the chain bucket elevator 130 is arranged in the lifting area 122, one end of the lower part of the chain bucket elevator 130 is located at the lowest part of the lifting area 122, namely below the lowest part of the cooling area 121, so that steel slag in the cooling area 121 can fall onto the chain bucket elevator 130 along the inclined bottom surface of the cooling area 121, is dehydrated and taken out by the chain bucket elevator 130 and is conveyed to a designated position.
In this embodiment, the lowest end of the lifting area 122 is located below the lowest end of the cooling area 121.
Specifically, the lowest end of the bucket elevator 130 can extend into the lowest end position of the lifting area 122, and since the lowest end of the lifting area 122 is located below the lowest end of the cooling area 121, the whole lower end portion of the bucket elevator 130 is located below the lowest end position of the cooling area 121, so that steel slag sliding along the inclined bottom surface of the cooling area 121 can fall onto the bucket elevator 130 completely.
The air quenching steel slag treatment system adopts high-pressure gas and water vapor as a medium, breaks down molten steel slag into spherical fine particles, supplements and cools with water, and strengthens the digestion reaction of f-CaO in the cooling process (namely, the sample is subjected to reaction treatment by strong acid or alkali under the heating condition to decompose organic matters or destroy reducing matters therein, various valence elements are oxidized into single high valence elements or are converted into inorganic compounds which are easy to separate, and meanwhile, the sample is concentrated, namely, clear, transparent and free of precipitation, thereby being convenient for analysis and determination). The unstable phase in the steel slag is basically disappeared in the granulating and cooling processes, the amorphous mineral phase on the surface of the particles is obviously increased, and the potential activity of the steel slag is improved. Because the surface tension of molten steel and the surface tension of liquid steel slag are different, the wind quenching process can well separate slag iron, solid slag and steel are spherical fine particles, the condition of slag ladle steel cannot occur, and the particle size distribution interval is narrower.
The air quenching method steel slag treatment system has the advantages of small investment, small occupied area, stable operation, fine and uniform granulated steel slag products, good steel slag separation degree, more contribution to sintered ingredients, magnetic separation and extraction of granular steel and comprehensive application of granular slag, and remarkable economic benefit.
The concrete changes of the steel slag in the treatment process are as follows:
the air hardening steel slag treatment technology of compressed air mixed with water vapor is mainly used for treating high-temperature liquid slag with slag temperature more than or equal to 1450 ℃ and good fluidity.
The liquid steel slag flows out from the slag hole at the lower side after the flow rate is controlled by the tundish, meanwhile, the granulator 110 below the slag hole sprays high-speed air flow mixed with water vapor to form strong impact on the steel slag flow falling in the air, so that the liquid steel slag is instantaneously dispersed in the air flow field to form semi-solidified granulated slag,
the flying slag particles fall into a cooling water tank and are subjected to water quenching treatment, the treated slag particles are uniform in granularity, and the granularity diameter is stably kept within 3 mm.
In the wind granulating process, ferrous oxide in high-temperature slag in a dispersed state acts on oxygen, a calcium ferrite phase generated by free calcium oxide in the slag falls into a water tank, fine steel slag particles act on water, and residual lime is digested.
The air quenching method steel slag treatment system adopts high-speed air flow with controllable pressure, flow speed and flow direction to impact and divide liquid steel slag, so that the liquid steel slag is granulated into the steel slag in a preset running track
Figure SMS_1
The left and right liquid drops fly along with high-speed air flow, and fall into a water tank to be rapidly cooled into solid spherical slag particles.
In the flying process of the granulated slag particles, compressed air carries out modification treatment on the dispersed solid solution phases of CaO.FeO and MgO.FeO in the liquid steel slag to form stable calcium ferrite and magnesium ferrite phases, and the digestion reaction of f-CaO is promoted when the molten and semi-molten slag particles fall into a water tank for cooling, so that the unstable phases in the steel slag are basically disappeared in the granulating and cooling processes. The amorphous mineral phase on the surface of the particles is obviously increased due to rapid cooling, and the potential activity of the steel slag is improved.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims (10)

1. A steel slag treatment system by an air quenching method, which is characterized by comprising:
the tundish is used for receiving the liquid steel slag and discharging the liquid steel slag from a slag outlet;
the air inlet of the granulator is connected with an air source station, the air outlet of the granulator is opposite to the position right below the slag hole of the tundish, and the air source station is used for outputting compressed air mixed with atomized water so that liquid steel slag discharged from the slag hole of the tundish is granulated into fine particles and falls into a cold water tank;
the cold water tank is positioned in front of the air outlet of the granulator;
the chain bucket elevator is positioned in the cold water tank and used for dehydrating and taking out the solid steel slag in the cold water tank and conveying the solid steel slag to a designated position.
2. The wind quenching steel slag processing system of claim 1, further comprising a steam recovery pipeline, wherein one end of the steam recovery pipeline is positioned above the cold water tank, and the other end of the steam recovery pipeline is connected with the dust remover.
3. The air quenching steel slag processing system according to claim 2, further comprising a safety box, wherein the bottom of the safety box is communicated and is positioned above the cold water tank, one side of the safety box is used for entering the granulated steel slag, and the top of the safety zone is communicated with one end of the steam recovery pipeline.
4. A wind quenching steel slag processing system as claimed in claim 3 wherein the top of said safety box is in the form of a pyramid and one end of said vapor recovery conduit communicates with the top of said pyramid.
5. The wind quenching steel slag processing system as set forth in claim 4 wherein the cold water tank includes a cooling zone, the cooling zone is integrally located below the safety box, the cooling zone has a depth at an end closer to the granulator that is less than a depth at an end farther from the granulator, and the bucket elevator is located at a side of the cooling zone farther from the granulator.
6. The wind quenching steel slag processing system as set forth in claim 5 wherein the cold water tank further comprises a lifting zone, the lifting zone is located on a side of the cooling zone away from the granulator, the depth of the lifting zone at one end near the cooling zone is greater than the depth of the lifting zone at one end far away from the cooling zone, and the chain bucket elevator is disposed in the lifting zone along the inclination angle of the bottom surface of the lifting zone.
7. The air quenching steel slag processing system as set forth in claim 6 wherein the level of the lowest end of the elevated zone is lower than the level of the lowest end of the reduced temperature zone.
8. The air quenching steel slag processing system as set forth in claim 7 wherein the lowest end of the lifting zone is below the lowest end of the cooling zone.
9. The air quenching steel slag processing system as set forth in claim 8 further comprising a tipping device for tipping a slag pot containing liquid steel slag toward the tundish to allow liquid steel slag in the slag pot to enter the tundish.
10. The air quenching steel slag processing system as set forth in claim 9 further comprising a lifting device for lifting the slag pot containing the liquid steel slag to a tipping device for enabling the tipping device to tip the liquid steel slag in the slag pot toward the tundish.
CN202211726305.1A 2022-12-30 2022-12-30 Air quenching method steel slag treatment system Pending CN116083663A (en)

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CN116083663A true CN116083663A (en) 2023-05-09

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