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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- 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
Abstract
A thermal state steel slag waste heat recovery system and recovery method pertains to the field of steel melting waste heat recovery technique. The system includes a slag basin, a wheeled material allocation quantitative feeder, slag inlet hole, a residue port, an air inlet port, an air outlet port, waste heat boiler, slag teeth, a feed lifting plate, and a rotary type steel slag waste heat recovery device, wherein, the wheeled material allocation quantitative feeder is composed of graining wheels connected in series, the slag teeth and the feed lifting plate are distributed on the inner wall of the rotary barrel, when the steel slag thrown by the feed lifting plate falls back to the bottom of the rotary barrel, the steel slag is crushed by the interaction between the steel slag and the slag teeth. Slag poured out from the slag pot with different fluidities, after crushing processing by the wheeled material allocation quantitative feeder, is quantitatively fed to the rotary type steel slag waste heat recovery device, and then further crushing processing to the steel slag and the recycling to the residual heat of steel slag are simultaneously realized. The invention has advantages of realizing graining and waste heat recovery processing to the slag pot with different fluidities.
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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| CN2009100767328A CN101476000B (en) | 2009-01-16 | 2009-01-16 | Thermal state steel slag waste heat recovery system and recovery method |
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| CN101476000B true CN101476000B (en) | 2011-04-20 |
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| CN102952908B (en) * | 2012-10-15 | 2014-07-30 | 唐山钢铁国际工程技术有限公司 | Equipment and method for steel slag air quenching and waste heat recycling |
| CN105728425B (en) * | 2016-01-19 | 2018-06-26 | 青岛理工大学 | It is a kind of using steel slag waste heat recycling biomass and the simultaneous techniques of innoxious chromium slag |
| CN105642654A (en) * | 2016-01-19 | 2016-06-08 | 青岛理工大学 | Synchronization technology of using waste heat of blast furnace slag to recycle sludge and reutilize chromic slag |
| CN106086257A (en) * | 2016-07-21 | 2016-11-09 | 昆明理工大学 | A kind of iron and steel enterprise's Blast furnace slag waste heat recovery device and method |
| CN108193006B (en) * | 2018-01-13 | 2019-06-28 | 秦皇岛点知汇科技有限公司 | A kind of centrifugal slag granulation and residual neat recovering system |
| CN108441589B (en) * | 2018-04-25 | 2019-09-24 | 云南玉溪玉昆钢铁集团有限公司 | A kind of drum process waste-heat recovery device used for steel slag treatment |
| CN109136428B (en) * | 2018-10-12 | 2020-12-15 | 一重集团大连工程技术有限公司 | Dry-method horizontal rotary type smelting steel slag treatment equipment and waste heat recovery method |
| CN109811095B (en) * | 2019-03-01 | 2020-04-21 | 西安交通大学 | Heat accumulating type 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 |
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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 |