CN115820949A - Steel slag recovery system - Google Patents
Steel slag recovery system Download PDFInfo
- Publication number
- CN115820949A CN115820949A CN202211419706.2A CN202211419706A CN115820949A CN 115820949 A CN115820949 A CN 115820949A CN 202211419706 A CN202211419706 A CN 202211419706A CN 115820949 A CN115820949 A CN 115820949A
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- slag
- steel slag
- machine
- ring cover
- recovery system
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- 239000002893 slag Substances 0.000 title claims abstract description 109
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 39
- 239000010959 steel Substances 0.000 title claims abstract description 39
- 238000011084 recovery Methods 0.000 title claims abstract description 20
- 238000007599 discharging Methods 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 9
- 230000009471 action Effects 0.000 claims abstract description 7
- 230000017525 heat dissipation Effects 0.000 claims abstract description 4
- 238000012423 maintenance Methods 0.000 claims abstract description 3
- 239000000428 dust Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000000007 visual effect Effects 0.000 claims description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims 2
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 13
- 238000009851 ferrous metallurgy Methods 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 abstract 1
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- 244000126211 Hericium coralloides Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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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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- Furnace Details (AREA)
Abstract
The invention relates to the technical field of ferrous metallurgy, in particular to a steel slag recovery system which comprises a closed sealed space formed by a ring cover and an annular conveyor, wherein a slag tank overturning machine, a granulating machine, a slag throwing machine and a discharging and conveying system are sequentially arranged in the sealed space along the rotating direction of the annular conveyor, all processing actions of the slag tank overturning machine, the granulating machine, the slag throwing machine and the discharging and conveying system are completed in the closed space of the ring cover, a driving device of the slag tank overturning machine is arranged outside the closed space to facilitate maintenance and meet the heat dissipation requirement of the slag tank overturning machine, an air blower communicated with the outside is further arranged on the inner side wall of the ring cover, and the outside of the ring cover is connected with a heat exchange system and a cleaning system for processing smoke. The invention can solve the pollution problem in the steel slag treatment process and save energy.
Description
Technical Field
The invention relates to the technical field of ferrous metallurgy, in particular to a steel slag recovery system.
Background
The steel slag is a by-product in the steel-making process, is an oxide generated after various elements in metal furnace charge are oxidized, and mainly contains CaO and Fe 2 O 3 、SiO 2 And FeO, the temperature of the steel slag reaches 1700 ℃ when the steel slag is discharged, the discharge amount accounts for about ten percent of the yield of the crude steel, and the steel slag is in a high-temperature molten state after the steel smelting is finished. The high-temperature steel slag is rapidly cooled and crushed. At present, the existing steel slag thermal crushing mainly comprises the following steps: slag bed type, drum type, air-blowing type, and splashing type. Although the modes can realize the cooling and the crushing of the steel slag, the modes are not beneficial to the recovery of sensible heat carried by the steel slag and can also causeThe generation of the flying dust can not meet the requirements of energy conservation and environmental protection.
Disclosure of Invention
The invention aims to provide a steel slag recovery system which can solve the problem of pollution in the steel slag treatment process and can save energy.
The invention provides a steel slag recovery system, which comprises a closed sealed space consisting of a ring cover and an annular conveyor, wherein a slag tank overturning machine, a granulating machine, a slag throwing machine and a discharging conveying system are sequentially arranged in the sealed space along the rotating direction of the annular conveyor, all processing actions of the slag tank overturning machine, the granulating machine, the slag throwing machine and the discharging conveying system are completed in the closed space of the ring cover, a driving device of the slag tank overturning machine is arranged outside the closed space to facilitate maintenance and meet the heat dissipation requirement of the slag tank overturning machine, an air blower communicated with the outside is further arranged on the inner side wall of the ring cover, and the outer side of the ring cover is connected with a heat exchange system and a cleaning system for processing flue gas.
Preferably, the ring cover consists of an annular cover body and a support column, the cover body is suspended above the annular conveyor through a vertical column, and a movable door for steel slag to pass through is arranged on the ring cover.
Preferably, the granulator comprises a granulator spindle and a rotary hammer arranged on the outer surface of the granulator spindle, and the granulator spindle is driven to rotate by a hydraulic motor.
Preferably, the slag throwing machine comprises a slag throwing machine main shaft and an arc panel arranged on the outer surface of the slag throwing machine main shaft, and the tail end of the arc panel is of a comb-tooth-shaped structure.
Preferably, the inner parts of the main shaft of the granulator and the main shaft of the slag throwing machine are both hollow structures and are used for introducing cooling circulating water for cooling.
Preferably, the discharging and transporting system comprises a material taking device and a laminated plate transporting device, and a stock bin is arranged at the tail end of the laminated plate transporting device.
Preferably, extracting device includes two upper and lower pivots, the both ends of pivot are equipped with the toothed disc respectively, two from top to bottom the outside cover of toothed disc is equipped with the chain rather than matching, the outside of chain is equipped with the arc of horizontal placing, the end of arc is equipped with the broach.
Preferably, the system also comprises a process visual system, wherein the visual system consists of a high-temperature explosion-proof camera, a hard disk video recorder and a monitor.
Preferably, the heat exchange system comprises a channel connected with the ring cover, the channel is connected with a hot air pipeline, and a heat exchanger for recycling heat energy is arranged on the hot air pipeline.
Preferably, the cleaning system comprises a dust remover arranged in the hot air pipeline, and the dust remover is connected with an emptying chimney.
Has the advantages that:
the main processing environment of the system is in a sealed form, dry (non-water spraying) heat exchange is adopted, air channels are formed in a sealed space by natural cold air, cooling efficiency is greatly improved, external water does not participate in the whole process, hydrogen is prevented from being generated after water is thermally decomposed, instantaneous high temperature and volume expansion of water are also avoided, and the risk of safety accidents is directly reduced. In addition, dust generated in the treatment process is removed, and the dust concentration of the operation site is low (less than or equal to 10 mg/m) 3 ) Low discharge concentration (less than or equal to 10 mg/m) 3 ). Because the slag throwing process is adopted, the slag is continuously thrown by high and low in the ring cover, the contact time and the contact area of the slag and a heat exchange medium are increased, the heat exchange efficiency is greatly improved, and compared with the traditional tank type hot stuffiness, the cooling time is reduced by about 40 percent. The sensible heat of the slag is recovered in a heat convection mode, and steam can be provided for other production process systems, so that energy is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of the system of the present invention;
FIG. 2 is a schematic view of the structure of the granulator of the present invention;
FIG. 3 is a schematic structural view of a slag throwing machine according to the present invention;
fig. 4 is a schematic structural view of a material extracting device in the present invention.
Description of reference numerals: 1-annular conveyer, 101-annular cover, 2-granulator, 201-granulator spindle, 202-rotary hammer, 3-slag throwing machine, 301-slag throwing machine spindle, 302-arc panel, 4-discharging conveying system, 401-material taking device, 402-laminated plate conveying device, 411-rotary shaft, 412-gear disc, 413-chain, 414-arc plate, 415-comb, 5-slag pot cover turning machine, 6-bunker, 7-hot air pipeline, 8-heat exchanger, 9-evacuation chimney and 10-dust remover.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
A steel slag recovery system comprises a closed sealed space formed by a ring cover 101 and an annular conveyor 1, wherein the ring cover is formed by an annular cover body and a supporting column, the cover body is hung above the annular conveyor through a vertical column, and a movable door for steel slag to pass through is arranged on the ring cover 101. A slag pot overturning machine 5, a granulating machine 2, a slag throwing machine 3 and a discharging and conveying system 4 are sequentially arranged in the sealed space along the rotating direction of the annular conveyor 1, all processing actions of the slag pot overturning machine, the granulating machine, the slag throwing machine and the discharging and conveying system are completed in the sealed space of the annular cover 101, and a driving device of the slag pot overturning machine is arranged outside the sealed space so as to be convenient to maintain and meet the heat dissipation requirement of the slag pot overturning machine; the inner side wall of the ring cover 101 is also provided with an air blower communicated with the outside, the air blower is used for providing natural cold air into the ring cover, and the outer side of the ring cover 101 is connected with a heat exchange system and a cleaning system for treating flue gas. In addition, the ring cover is not an integral welding structure, but is assembled by fasteners in a sectional mode, so that the ring cover is convenient to maintain and repair and is high in efficiency and disassembly. The whole function of the annular cover is to prevent heat from leaking, keep the air duct stable and prevent dust from flowing away. The cleanness and tidiness of a treatment workshop are ensured, and air pollution is prevented. And meanwhile, powerful guarantee is provided for sensible heat recovery and dust removal functions.
The slag pot overturning machine 5 realizes the overturning of the hot slag through an overturning mechanism and evenly tiles the hot slag on the annular conveyor 1. The granulator 2 comprises a granulator spindle 201 and a rotary hammer 202 arranged on the outer surface of the granulator spindle, the granulator is driven to rotate by a hydraulic motor (matched speed reducer), the inside of the spindle is hollow, and circulating water is cooled. The slag is gradually granulated under the action of the relative movement of the endless conveyor 1 and the hammering action of the rotary hammer 202 at the hydraulically driven adjustable speed.
The slag throwing machine 3 comprises a slag throwing machine main shaft 301 and an arc-shaped panel 302 arranged on the outer surface of the slag throwing machine main shaft, and the tail end of the arc-shaped panel 302 is of a comb-tooth-shaped structure. The slag throwing machine 3 adopts a cambered surface comb tooth form, the cambered plate 302 shovels the granulated slag by means of the comb teeth, and gradually throws the slag into a half space after the rotation angle of the main shaft is changed, so that the slag is fully subjected to heat exchange with air distribution. The inside of the main shaft is cooled in a hollow cooling circulating water mode, and the slag throwing machine achieves three functions of slag throwing, crushing and cooling.
The discharging and conveying system 4 comprises a material taking device 401 and a laminated plate conveying device 402, and a stock bin 6 is arranged at the tail end of the laminated plate conveying device 402.
The material taking device 401 comprises an upper rotating shaft 411 and a lower rotating shaft 411, two ends of the rotating shaft 411 are respectively sleeved with a gear disc 412, chains 413 matched with the upper and lower gear discs are sleeved on the outer sides of the upper and lower gear discs, an arc-shaped plate 414 transversely arranged is arranged on the outer side of the chains 413, and comb teeth 415 are arranged at the tail end of the arc-shaped plate 414. The material taking device 401 takes the granulated and cooled slag out of the material layer by utilizing the action of the arc-shaped plates and the comb teeth, and then outputs the material to the laminated plate conveying device 402 along with the influence of the rotating angle, and the material is conveyed to the material bin 6 by the laminated plate conveying device 402.
The visual system of the treatment process mainly comprises a high-temperature explosion-proof camera, a hard disk video recorder, a monitor and other auxiliary equipment. The cameras are mainly arranged in the working area of each main device, abnormal conditions can be found in time, and the abnormal conditions are processed through a steel grabbing machine or system parameters are adjusted in time.
The cleaning system and the heat exchange system discharge hot air led out from the ring cover by using the induced draft fan after filtration by the dust remover 10 and heat exchange by the heat exchanger 8.
The heat exchange system comprises a channel connected with the annular cover, the channel is connected with a hot air pipeline 7, a heat exchanger 8 used for achieving heat energy recycling is arranged on the hot air pipeline, the cleaning system comprises a dust remover 10 arranged on the hot air pipeline, the dust remover is connected with an emptying chimney 9, and hot air led out from the interior of the annular cover 101 by the draught fan is processed through the heat exchange system and the cleaning system.
The working and using processes are as follows:
1. the crown block lifts the slag pot filled with the slag and transports the slag pot to the upper part of the slag pot overturning machine 5.
2. Opening a movable door of the ring cover 101, and after exposing the slag ladle overturning machine 5, putting the slag ladle on the slag ladle overturning machine 5 by a crown block; subsequently, the crown block is unhooked and the movable door is closed.
3. When the movable door is closed, the ring conveyor 1 is started. Along with the uniform-speed circumferential movement of the annular conveyor 1, the slag pot overturning machine 5 simultaneously realizes the function of flatly paving slag, the slag pot overturning machine 5 uniformly dumps the slag in the slag pot onto the annular conveyor 1, and the liquid slag forms a long belt and moves along with the annular conveyor 1.
4. And (3) grabbing and removing the massive steel slag and the furnace mouth, opening a movable door on the ring cover 101 when the massive steel slag and the furnace mouth are found after the slag pot overturning machine 5 overturns the steel slag to the ring conveyor 1, and removing the massive steel slag and the furnace mouth out of the system through the steel grabbing machine.
5. When the ring conveyor 1 carries the slag to the granulator 2, the granulator starts to rotate to crush the slag.
6. The comb teeth of the slag throwing machine 3 pick up the slag, the slag is further cooled in the throwing process, and the process can be provided with a plurality of slag throwing machines according to the equipment specification so as to realize the repeated throwing process.
The quantity allocation of the granulating machine and the slag throwing machine is determined according to the steel slag treatment amount and the equipment specification.
7. The discharge conveyor system 4 picks up the cooled slag and transports it by the stack conveyor 402 to the silo 6 for use.
8. The cleaning system and the heat exchange system recover and filter the heat of the hot air into the standard of national standard emission, and meet the requirements of environmental protection and energy recovery.
The process system can process more than 120 tons of steel slag per hour, and the actual processing capacity can be adjusted according to the requirements of users or the yield. The air quantity is 20 ten thousand square/hour, and is adjusted according to the situation and the requirement.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a steel slag recovery system, its characterized in that includes the confined enclosure space of constituteing by ring cover and endless conveyor, follows in the enclosure space endless conveyor pivoted direction is equipped with slag ladle in proper order and turns over covering machine, granulator, throws sediment machine and ejection of compact conveying system, and all processing actions of slag ladle cover turning over covering machine, granulator, throw sediment machine, ejection of compact conveying system are all accomplished in the enclosure space of ring cover, and its drive arrangement then places outside the enclosure space to convenient maintenance and satisfy its heat dissipation demand, still be equipped with on the ring cover inside wall with external communicating air-blower, the outside of ring cover is connected with heat exchange system and the clean system that is used for handling the flue gas.
2. The steel slag recovery system of claim 1, wherein the ring cover is composed of an annular cover body and a supporting column, the cover body is suspended above the annular conveyor through a vertical column, and a movable door for steel slag to pass through is arranged on the ring cover.
3. The steel slag recovery system of claim 1, wherein the granulator comprises a main shaft of the granulator and a rotary hammer disposed on an outer surface of the main shaft of the granulator, and the main shaft of the granulator is driven to rotate by a hydraulic motor.
4. The steel slag recovery system of claim 3, wherein the slag throwing machine comprises a main shaft of the slag throwing machine and an arc panel arranged on the outer surface of the main shaft of the slag throwing machine, and the tail end of the arc panel is of a comb-tooth-shaped structure.
5. The steel slag recovery system according to claim 4, wherein the inside of the main shaft of the granulator and the main shaft of the slag thrower are both hollow structures, and are used for introducing cooling circulating water for cooling.
6. The steel slag recovery system of claim 1, wherein the discharging and transporting system comprises a material taking device and a stacking and transporting device, and a storage bin is arranged at the tail end of the stacking and transporting device.
7. The steel slag recovery system according to claim 6, wherein the material taking device comprises an upper rotating shaft and a lower rotating shaft, gear plates are respectively sleeved at two ends of the rotating shafts, chains matched with the upper and lower gear plates are sleeved on the outer sides of the upper and lower gear plates, an arc-shaped plate is transversely arranged on the outer side of each chain, and comb teeth are arranged at the tail ends of the arc-shaped plates.
8. The steel slag recovery system of claim 1, further comprising a visual processing system, wherein the visual processing system comprises a high temperature explosion-proof camera, a hard disk video recorder and a monitor.
9. The steel slag recovery system according to claim 1, wherein the heat exchange system comprises a channel connected with the ring cover, the channel is connected with a hot air pipeline, and the hot air pipeline is provided with a heat exchanger for recycling heat energy.
10. The steel slag recovery system according to claim 9, wherein the cleaning system comprises a dust collector disposed in the hot air duct, and the dust collector is connected with an evacuation chimney.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211419706.2A CN115820949A (en) | 2022-11-14 | 2022-11-14 | Steel slag recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211419706.2A CN115820949A (en) | 2022-11-14 | 2022-11-14 | Steel slag recovery system |
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| CN115820949A true CN115820949A (en) | 2023-03-21 |
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| CN202211419706.2A Pending CN115820949A (en) | 2022-11-14 | 2022-11-14 | Steel slag recovery system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880737A (en) * | 2010-06-02 | 2010-11-10 | 首钢总公司 | System and method for recovering waste heat of continuous hot steel slag |
| WO2018000858A1 (en) * | 2016-06-30 | 2018-01-04 | 宝山钢铁股份有限公司 | Roller treatment process and treatment device suitable for total-amount steel slag treatment |
| CN111518971A (en) * | 2020-06-30 | 2020-08-11 | 河北思莱格环境科技有限公司 | High-temperature metallurgical slag environment cleaning, heat taking and dry processing system and process |
| CN212451465U (en) * | 2020-06-30 | 2021-02-02 | 河北思莱格环境科技有限公司 | High-temperature metallurgical slag environment cleaning, heat taking and dry processing system |
| CN113061674A (en) * | 2021-04-17 | 2021-07-02 | 北京清皓源技术有限公司 | Metallurgical slag treatment method and system |
| CN214765803U (en) * | 2021-04-28 | 2021-11-19 | 王文祥 | High-temperature steel slag rolling crushing air-cooling waste heat recovery device |
-
2022
- 2022-11-14 CN CN202211419706.2A patent/CN115820949A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101880737A (en) * | 2010-06-02 | 2010-11-10 | 首钢总公司 | System and method for recovering waste heat of continuous hot steel slag |
| WO2018000858A1 (en) * | 2016-06-30 | 2018-01-04 | 宝山钢铁股份有限公司 | Roller treatment process and treatment device suitable for total-amount steel slag treatment |
| CN111518971A (en) * | 2020-06-30 | 2020-08-11 | 河北思莱格环境科技有限公司 | High-temperature metallurgical slag environment cleaning, heat taking and dry processing system and process |
| CN212451465U (en) * | 2020-06-30 | 2021-02-02 | 河北思莱格环境科技有限公司 | High-temperature metallurgical slag environment cleaning, heat taking and dry processing system |
| CN113061674A (en) * | 2021-04-17 | 2021-07-02 | 北京清皓源技术有限公司 | Metallurgical slag treatment method and system |
| CN214765803U (en) * | 2021-04-28 | 2021-11-19 | 王文祥 | High-temperature steel slag rolling crushing air-cooling waste heat recovery device |
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