CN101476000B - Thermal state steel slag waste heat recovery system and recovery method - Google Patents
Thermal state steel slag waste heat recovery system and recovery method Download PDFInfo
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- CN101476000B CN101476000B CN2009100767328A CN200910076732A CN101476000B CN 101476000 B CN101476000 B CN 101476000B CN 2009100767328 A CN2009100767328 A CN 2009100767328A CN 200910076732 A CN200910076732 A CN 200910076732A CN 101476000 B CN101476000 B CN 101476000B
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- 239000002893 slag Substances 0.000 title claims abstract description 154
- 239000002918 waste heat Substances 0.000 title claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 32
- 239000010959 steel Substances 0.000 title claims abstract description 32
- 238000011084 recovery Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 38
- 238000005469 granulation Methods 0.000 claims abstract description 13
- 230000003179 granulation Effects 0.000 claims abstract description 13
- 230000003993 interaction Effects 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims description 8
- 238000013467 fragmentation Methods 0.000 claims description 7
- 238000006062 fragmentation reaction Methods 0.000 claims description 7
- 238000007710 freezing Methods 0.000 claims description 5
- 230000008014 freezing Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000009628 steelmaking Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000010791 quenching Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000011400 blast furnace cement Substances 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 230000001351 cycling effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
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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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- Manufacture Of Iron (AREA)
- Furnace Details (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
一种热态钢渣余热回收系统及回收方法，属于炼钢余热回收技术领域。系统包括渣罐、轮式拨料定量给料器、进渣口、出渣口、进气口、出气口、余热锅炉、碎渣齿、扬料板、回转式钢渣余热回收器；轮式拨料定量给料器由1～5个粒化轮串联在一起组成，旋转滚筒内壁分布有碎渣齿和扬料板，被扬料板抛起的钢渣在下落到滚筒底部时，通过与碎渣齿的相互作用，实现钢渣的破碎。由渣罐中倾倒出的不同流动度的钢渣在经轮式拨料定量给料器破碎处理后，定量给料至回转式钢渣余热回收器，并随之实现对钢渣的进一步破碎处理，同时实现对钢渣的余热进行回收。优点在于，实现对具有不同流动度的钢渣进行粒化和余热回收处理。
A waste heat recovery system and recovery method for hot steel slag belong to the technical field of steelmaking waste heat recovery. The system includes a slag tank, a wheel-type dial quantitative feeder, a slag inlet, a slag outlet, an air inlet, an air outlet, a waste heat boiler, a slag tooth, a lifting plate, a rotary steel slag waste heat recovery device; The material quantitative feeder is composed of 1 to 5 granulation wheels connected in series. There are slag teeth and lifting plates distributed on the inner wall of the rotating drum. The interaction of teeth realizes the crushing of steel slag. The steel slag poured out of the slag tank with different fluidity is crushed by the wheel-type dial quantitative feeder, and then quantitatively fed to the rotary steel slag waste heat recovery device, and then the steel slag is further crushed, and at the same time The waste heat of steel slag is recovered. The advantage is that the granulation and waste heat recovery treatment of steel slag with different fluidity can be realized.
Description
Technical field
The invention belongs to technical field of ferrous metallurgy, particularly relate to a kind of residual neat recovering system and recovery method of hot steel slag, be applicable to that the slag to the various degree of mobilization that produce in the steelmaking process carries out waste heat recovery.
Background technology
The recovery of iron and steel enterprise's residual heat resources is the focal issue that the countries in the world metallargist pays close attention to efficient conversion always.Wherein the liquid steel slag temperature is 1500 ℃～1700 ℃, and the waste heat quality is higher, has utility value.
The exploitation of Russia Ural iron and steel research institute with in the ak quench steel slag treatment process of energy recovery, liquid steel slag quenched by high-pressure blast broken after, can be cooled to 160～200 ℃, recovery waste heat is used to produce hot water, steam etc.Mitsubishi cooperated with NKK in 1981, built up in the world the first cover bessemer furnace slag wind granulation heat reclamation device of quenching at Fushan system iron, and by radiation and convective heat exchange, the slag temperature is when 1500 ℃ drop to 300 ℃ of left and right sides, and heat recovery rate can reach 40%～45%.But wind is quenched and is handled only suitable flowability liquid steel slag preferably.
NKK injects molten steel slag between 2 rotary drums, and bubbling air in the rotary drum, slag form the thin slag sheet of one deck and adhere on the rotary drum under the extruding of 2 rotary drums, and thin slag sheet is in the cooling rapidly of the surface of rotary drum, and heat is taken away by fluidizing air in the rotary drum.Thin slag sheet is bonded on the rotary drum and must it be smash down with rake, and the heat recovery rate and the life-span of equipment are lower, and the gained slag in the form of sheets, is difficult for utilizing.
Ma Gang in 1988 has obtained " slag wind quench granulating device " patent (patent No.: CN88211276) at home.At present, this technology all has application apparatus at Ma Gang, Cheng Gang, Shi Gang etc.Regrettably, the patented technology of domestic-developed and application apparatus all are conceived to the granulation of slag, and the sensible heat of slag are not reclaimed.
The patent No. is the patent " metallurgical slag sensible heat utilization device " of ZL 200720021048.6; the fused solution metallurgical slag has been described after granulation is taken turns centrifugal broken granulation; under the high pressure wind effect; quenched into particulate state by wind; enter vertical heat exchanger; in dropping process by with the heat exchange of air, realize the cooling of slag.
Application number is that 200510047090.0 patent " a kind of blast-furnace cement sensible heat recovery system and production technique " process object is a blast furnace slag, its production technique is made up of just cold-breaking unit, gas-slag heat exchange unit, waste heat boiler, and what wherein gas-slag heat exchange unit adopted is chain grate machine structure or slag ladle structure.
Above-mentioned slag treatment technology mostly adopts high-pressure blast and is aided with liquid water liquid towards slag and carries out granulation and cooling, because institute's required airflow is bigger, and water carried out quenching to slag, and heat recovery efficiency is low.This class technology only is fit to handle flowability liquid steel slag preferably simultaneously, and along with the progress of steel-smelting technology, slag viscosity has increase tendency, and this safety that is unfavorable for liquid steel slag is handled with efficient.
Be the vertical heat exchanger of mentioning in the patent " metallurgical slag sensible heat utilization device " of ZL 200720021048.6 except the patent No. at present, and application number is outside the chain grate machine structure of mentioning in 200510047090.0 the patent " a kind of blast-furnace cement sensible heat recovery system and production technique " or slag ladle structure, also do not have special-purpose slag waste heat recovery apparatus.
Summary of the invention
The object of the invention provides a kind of residual neat recovering system and recovery method of hot steel slag, can realize the slag of various degree of mobilization is carried out preliminary granulated processed and and then realization waste heat recovery.
System of the present invention comprises slag ladle, wheeled material toggling proportioner, slag inlet, slag notch, inlet mouth, air outlet, waste heat boiler, disintegrating slag tooth, material delivering plate, rotary type slag waste-heat recoverer; it is characterized in that; wheeled material toggling proportioner is cascaded by 1～5 granulation wheel and forms; the swing roller inwall is distributed with disintegrating slag tooth and material delivering plate; the slag of being thrown by material delivering plate is when dropping to cylinder bottom; by with the interaction of disintegrating slag tooth, realize the fragmentation of slag.
Technology of the present invention is: by the slag of toppling over the different degree of mobilization that in the slag ladle after wheeled material toggling proportioner break process, dosing is to rotary type slag waste-heat recoverer, and realize further break process to slag realizing the waste heat of slag is reclaimed simultaneously thereupon; The swing roller inwall is distributed with disintegrating slag tooth and material delivering plate, the slag of being thrown by material delivering plate when dropping to cylinder bottom, by with the interaction of disintegrating slag tooth, realize the fragmentation of slag, make the surperficial continuous updating of hot steel slag, guarantee thorough, the evenly release of heat in the slag.
By wheeled material toggling proportioner, in preliminary broken to slag, by the mechanical force dosing to subsequent handling.In the dosing process, can by the freezing air that blasts medium also, realize recovery to the slag waste heat.
Owing to, can realize the slag with different degree of mobilization is carried out granulation and waste heat recovery processing by the dosing and the granulated processed of mechanical force realization to slag; Slag does not directly contact with water in treating processes simultaneously, not only can effectively prevent the decline of heat quality, but also can avoid molten steel slag to meet the problem of water blast.
Through the slag of wheeled material toggling proportioner, granularity further diminishes.In rotary type slag waste-heat recoverer under the band material effect of material delivering plate, the slag material thrown with dropping process in, with the reverse interaction that blasts freezing air, realize the cooling of slag.The slag of being thrown by material delivering plate when dropping to cylinder bottom, by with the interaction that is distributed in the disintegrating slag tooth on the drum inner surface, further realize the fragmentation of slag, make its surperficial continuous updating, thereby guaranteed in the slag that heat thoroughly, evenly discharge.
Heated air enters waste heat boiler and carries out heat exchange by air line after dedusting, heat-exchanged air enters by air line again carries out cycling hot exchange next time in the swing roller.Cooled steel slag is discharged by the slag notch that is positioned at the swing roller afterbody.
The present invention mainly has following characteristics:
1, the present invention can realize the waste heat of various degree of mobilization slags is reclaimed.
2, the present invention carries out granulated processed to slag waste heat recovery process simultaneously to slag, thereby can guarantee thorough, the high efficiente callback of slag waste heat.
3, in the rotary type waste-heat recoverer of the present invention, cooling air and the surperficial slag of bringing in constant renewal in carry out heat exchange by convection current and radiation mode, and the slag calorific loss is little, heat exchanger effectiveness is high.
4, the present invention can guarantee steadily carrying out of subsequent disposal by the dosing of wheeled material toggling proportioner, can make the recovery heat continual and steady, is convenient to utilize.
5, in the treatment process of the present invention,, not only can effectively prevent the decline of heat quality, and can avoid molten steel slag to meet the problem of water blast because slag does not directly contact with water.
6, the present invention has realized the granulated processed to slag the slag waste heat being reclaimed simultaneously, is beneficial to the following process utilization of slag.
Description of drawings
The invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is a structural representation of the present invention.Wherein, slag ladle 1, wheeled material toggling proportioner 2, slag inlet 3, slag notch 4, inlet mouth 5, air outlet 6, waste heat boiler 7, disintegrating slag tooth 8, material delivering plate 9, rotary type slag waste-heat recoverer 10.
Fig. 2 is the distribution and the shape synoptic diagram of interior disintegrating slag tooth of cylinder support roller device and tube and material delivering plate.Disintegrating slag tooth 8, material delivering plate 9.
Embodiment
Fig. 1 and Fig. 2 are a kind of embodiment of the present invention.
Hot steel slag in the slag ladle 1 enters in the wheeled material toggling pelletizer 2 by the slag chute; by the granulation gear teeth and be installed on interaction between the broken slag device on the horizontal plane; realize dosing on the one hand to subsequent handling; realize the granulation of slag on the other hand, also can reclaim in addition by the air that feeds by inlet mouth 5 part of waste heat to hot steel slag.Through the slag after preliminary cooling, the granulation, via slag inlet 3 dosings to rotary type slag waste-heat recoverer 10.In withdrawer under the band material effect of material delivering plate 9, the slag material thrown with dropping process in, with the reverse interaction that blasts freezing air, realize the cooling of slag.Heated air is entered waste heat boiler 7 and is carried out heat exchange by air outlet 6 bubbling air pipelines after dedusting, heat-exchanged air enters by air line again carries out cycling hot exchange next time in the swing roller.
The slag of being thrown by material delivering plate when dropping to cylinder bottom, by with the interaction that is distributed in the disintegrating slag tooth 8 on the drum inner surface, realize the fragmentation of slag, make the surperficial continuous updating of hot steel slag.Cooled steel slag is discharged by the slag notch 4 that is positioned at the swing roller afterbody.
Claims (4)
1. thermal state steel slag waste heat recovery system, this system comprises slag ladle, wheeled material toggling proportioner, slag inlet, slag notch, inlet mouth, air outlet, waste heat boiler, disintegrating slag tooth, material delivering plate, rotary type slag waste-heat recoverer, it is characterized in that, wheeled material toggling proportioner (2) is cascaded by 1～5 granulation wheel and forms, the swing roller inwall is distributed with disintegrating slag tooth inwall and is distributed with disintegrating slag tooth (8) and material delivering plate (9), the slag of being thrown by material delivering plate is when dropping to the swing roller bottom, by with the interaction of disintegrating slag tooth, realize the fragmentation of slag; Swing roller is exactly a rotary type slag waste-heat recoverer.
2. one kind is adopted the described system of claim 1 hot steel slag exhaust heat recovering method, it is characterized in that, by the slag of toppling over the different degree of mobilization that in the slag ladle after wheeled material toggling proportioner break process, dosing is to rotary type slag waste-heat recoverer, and realize further break process to slag realizing the waste heat of slag is reclaimed simultaneously thereupon; The swing roller inwall is distributed with disintegrating slag tooth (8) and material delivering plate (9), the slag of being thrown by material delivering plate when dropping to the swing roller bottom, by with the interaction of disintegrating slag tooth, realize the fragmentation of slag, make the surperficial continuous updating of hot steel slag, guarantee thorough, the evenly release of heat in the slag.
3. method according to claim 2 is characterized in that, by wheeled material toggling proportioner, and in preliminary broken to slag, by the mechanical force dosing to subsequent handling; In the dosing process, be medium by the freezing air that blasts, realize recovery to the slag waste heat.
4. method according to claim 3 is characterized in that, in rotary type slag waste-heat recoverer under the band material effect of material delivering plate, the slag material thrown with dropping process in, with the reverse interaction that blasts freezing air, realize the cooling of slag; The slag of being thrown by material delivering plate when dropping to the swing roller bottom, by with the interaction that is distributed in the disintegrating slag tooth on the swing roller internal surface, further realize the fragmentation of slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2009100767328A CN101476000B (en) | 2009-01-16 | 2009-01-16 | Thermal state steel slag waste heat recovery system and recovery method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100767328A CN101476000B (en) | 2009-01-16 | 2009-01-16 | Thermal state steel slag waste heat recovery system and recovery method |
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| CN101476000A CN101476000A (en) | 2009-07-08 |
| CN101476000B true CN101476000B (en) | 2011-04-20 |
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| CN102191342B (en) * | 2010-03-08 | 2013-08-14 | 中冶建筑研究总院有限公司 | Comprehensive treatment system and method of steel slag roller crushing-waste heat press self-dissolving and waste heat recovery |
| CN102191343B (en) * | 2010-03-08 | 2013-08-14 | 中冶建筑研究总院有限公司 | Aircooled crushing device and method of molten steel slag |
| 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 |
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| CN108441589B (en) * | 2018-04-25 | 2019-09-24 | 云南玉溪玉昆钢铁集团有限公司 | A waste heat recovery device for steel slag treatment by drum method |
| CN109136428B (en) * | 2018-10-12 | 2020-12-15 | 一重集团大连工程技术有限公司 | Dry horizontal rotary smelting steel slag treatment equipment and waste heat recovery method |
| CN109811095B (en) * | 2019-03-01 | 2020-04-21 | 西安交通大学 | A regenerative stainless steel slag waste heat recovery device and method |
| CN111020073B (en) * | 2019-12-04 | 2021-01-29 | 西安交通大学 | Liquid slag dry-type granulating and waste heat recovering device with slag wool crushing function and operation method thereof |
| CN111593148B (en) * | 2020-07-14 | 2021-09-24 | 包钢集团冶金渣综合利用开发有限责任公司 | Converter smelting solid waste steel slag hot splashing method treatment system and treatment method |
| CN111850194A (en) * | 2020-08-04 | 2020-10-30 | 中冶节能环保有限责任公司 | High-temperature steel slag bottom blowing air cooling crushing waste heat recovery device and method |
| CN112708710A (en) * | 2020-12-18 | 2021-04-27 | 重庆岩昱节能科技有限公司 | Waste heat recovery system for steel smelting |
| CN113528720B (en) * | 2021-06-25 | 2022-11-29 | 武钢集团昆明钢铁股份有限公司 | Continuous pretreatment device and method for molten steel slag |
| CN115779844B (en) * | 2023-02-09 | 2023-05-12 | 原初科技（北京）有限公司 | Slag reactor and slag method |
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Address after: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Shijingshan District, Shijingshan District, Beijing Patentee before: Capital Iron & Steel General Company |
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