CN201400690Y - Supersonic gas nozzle for granulating liquid molten slags - Google Patents
Supersonic gas nozzle for granulating liquid molten slags Download PDFInfo
- Publication number
- CN201400690Y CN201400690Y CN2009201022587U CN200920102258U CN201400690Y CN 201400690 Y CN201400690 Y CN 201400690Y CN 2009201022587 U CN2009201022587 U CN 2009201022587U CN 200920102258 U CN200920102258 U CN 200920102258U CN 201400690 Y CN201400690 Y CN 201400690Y
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- China
- Prior art keywords
- gas
- nozzle
- slag
- supersonic
- spray orifice
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/026—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
- C21B2400/05—Apparatus features
- C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag
Abstract
A supersonic gas nozzle for granulating liquid molten slags belongs to the technical field of metallurgical equipment, is used for increasing the speed of gas jet flow at the exist of a gas quenchinggranulating nozzle to improve the waste heat recovery efficiency of metallurgical slags, and adopts the technical scheme that the supersonic gas nozzle comprises a nozzle body, spray orifices, a nozzle chamber and a connection pipe, wherein the spray orifices are formed by 10-30 Laval gas spray orifices. Gas at the exist of each spray orifice is supersonic jet flow, accordingly the gas has high impact kinetic energy, slag drop granularity can be reduced to be smaller than 1mm, and then gas-liquid and gas-solid heat exchange efficiency is improved. Besides, the distance between adjacent spray orifices ranges from 3mm to 10mm, and supersonic gas jet flow of the gas spray orifices is mixed together at a distance ranging from 100mm to 300mm, accordingly supersonic gas streams acted on liquid slag flow is guaranteed to keep stable; gas at the exist of each spray orifice is supersonic jet flow with temperature lower than -100 DEG C, accordingly temperature gradient between gas and liquid isincreased, and the cooling speed of the slag drops is improved.
Description
Technical field
The utility model relates to a kind of supersonic gas nozzle that is used for the liquid metallurgical slag of granulation, belongs to technical field of metallurgical equipment.
Background technology
Blast furnace slag and slag have very high temperature (1450～1650 ℃), belong to high-quality residual heat resources, have very high recovery value.But at present, metallurgical slag is many based on water quenching and hot application method both at home and abroad, and heat can't be recycled.Need to consider following problem in the metallurgical slag sensible heat removal process:
The first, thermal conductivity liquid and solid slag is relatively low, has increased difficulty for the recovery dross sensible heat.In the liquid phase stage of liquid slag, its thermal conductivity λ is 0.1～0.3W/ (mK).Can form two class solid phases after metallurgical slag solidifies---glassy phase and crystal mutually, the thermal conductivity λ of glassy phase is 1～2W/ (mK), crystal phase thermal conductivity λ is about 7W/ (mK).Therefore it all is quite difficult taking which kind of medium that sensible heat in the slag is extracted;
The second, the cooling intensity of molten slag is determining the comprehensive utilization of metallurgical slag.Because metallurgical slag belongs to silicate systems, exist glassy phase and crystal mutually after solidifying, cooling intensity forms the crystal phase when low, and hydration activity is lower; Form amorphous phase or glassy phase when cooling intensity is higher, hydration activity is higher, is suitable for its high-efficiency resource recycling.Therefore the liquid metallurgical slag that how to guarantee lower thermal conductivity obtains very high cooling intensity to carry out heat exchange and solidifies, and is the assurance of metallurgical slag being carried out high-efficiency resource recycling.
The 3rd, the particle diameter after the liquid metallurgical slag granulation is remarkable to waste heat recovery and resource utilization influence thereof.Under the certain prerequisite of metallurgical slag thermal conductivity,, the metallurgical slag granularity must be reduced, to improve its heat interchanging area in order to improve the heat transfer intensity of liquid and solid-state metallurgical slag slag particle.Clearly, the liquid towards metallurgical slag carries out that granulation is more energy-conservation than the fine grinding of solid-state metallurgical slag, efficient is higher.Therefore how liquid metallurgical slag being carried out granulation is the prerequisite of metallurgical slag being carried out efficient resource utilization.
The technology of at present liquid metallurgical slag being carried out dry granulation mainly comprises two big classes: a class is the gas method of quenching, and another kind of is the centrifugal granulation method.In the latter stage seventies, Japan's wind method of quenching that begins one's study is handled the blast furnace slag novel process, and its technology is: metallurgical slag is poured out from sludge ladle, is blown into the bell-type boiler after being broken into slag particle by airstream, and slag particle is transmitted device and discharges.In the bell-type boiler, liquid slag is dripped by radiation and convection type, high-temp solid slag particle by conduction and convection type the heat transferred boi1er tube, recyclable thus 40%～45% heat of slags.1985～1987 years China Metallurgical Group Construction Research Institutes and Ma Ganggang grind place Ma Gang and have carried out the pelletizing technology test of quenching of slag wind, and the hot melt slag is compressed air and smashes and fall into the water, and has obtained success, and use in Chengdu Steel Works and heavy steel the back.Britain, Australia etc. also carried out the correlative study that centrifugal granulation (revolving cup or plate-spinning method) method is handled blast furnace slag; its technology is: adopt the slightly recessed plate in the center of a high speed rotating as pelletizer; liquid slag is injected into the plate center by slag runner or pipeline; plate is rotation continuously under the drive of electric motor; when the plate speed of rotation reaches one regularly; melt cinder is because action of centrifugal force flies out the granulation granulating from the rim.Liquid slag particle carries out heat exchange to solidifying with air in flight course.Metallurgical slag after solidifying continues to drop to device bottom, establishes a fluidized-bed in the bottom, and the slag particle in fluidized-bed further carries out heat exchange with air, warm air slave unit recovered overhead.
Quench in the technological process at quench method pilot-plant test and existing wind of wind, airstream realizes by gas granulation nozzle, and the gas of the using granulation nozzle of quenching all is a straight pass at present, forms jet and metallurgical slag is smashed at jet exit by high-pressure air.For example, employed atomizer nozzle among the patent of invention 88211276.7 of Ma'anshan Iron and Steel Corp and the utility model patent ZL93239693.3 of Chengdu Iron And Steel Company, spout all is designed to straight pass, spraying gun spray orifice decoration form and jet nozzle angle also design, the spray orifice decoration form mainly contains five kinds of arrangement forms such as many row's rectangulars, slit-type, " H " type, grooved and " U " type, utilizes high-pressure air to go out the interruption-forming jet at spraying gun.In addition; these patent indication atomizer nozzles are in production practice; the best position of pelletizer and the relative position of pelletizer and slag trough have also been determined; maintenance is carried out the melt cinder granulation to the certain impact depth of slag stream, finally reaches the target that the melt cinder that will have certain viscosity carries out safe granulation.Granulation jet exit gas efflux velocity is relatively low but existing straight pass gas is quenched, and is less, lower to the cooling intensity of melt cinder to the surging force of slag stream, therefore explores supersonic speed gas jetting the melt cinder granulation is had very important significance.
As everyone knows, Lavalle (Laval) nozzle can provide cryogenic supersonic speed gas jetting, its ultimate principle is that high pressure gas quicken by contraction section, gas stream scooter velocity of sound when arriving aditus laryngis, gas further quickens after entering expansion segment, thereby the formation supersonic speed gas jetting, the oxygen rifle that converter steelmaking is used has also all utilized this characteristic of Lavalle type gas jet.Laval nozzle exit gas effusive temperature is very low, and its temperature is relevant with the Mach number of the laval nozzle of design, and Mach number is big more, and the temperature of exit gas is also just low more.Therefore; Lavalle type nozzle provides the supersonic speed gas jetting that temperature is lower, kinetic energy is very big for the melt cinder granulation just; supersonic jet forms the littler slag particle of granularity after can making the melt cinder granulation; created good condition for solution-air and gas-solid heat exchange, the low-temperature performance of supersonic speed gas jetting also creates conditions for the shell that is rapidly solidificated into that slag drips in addition.
Summary of the invention
Thereby technical problem to be solved in the utility model provides a kind of gas supersonic gas nozzle that molten slag carries out granulation that is used for of granulation jet exit gas efflux velocity height,, the waste heat recovery efficient that to the cooling intensity height of melt cinder can improve metallurgical slag big to the surging force of slag stream of quenching.
The technical scheme that solves the problems of the technologies described above is:
A kind ofly be used for the supersonic gas nozzle that molten slag carries out granulation; it is made up of nozzle body, spray orifice, nozzle chamber, pipe connecting; spray orifice is distributed in the nozzle body front portion; nozzle chamber is at the middle part of nozzle body, and pipe connecting one end is connected with nozzle chamber, and the other end is connected with high pressure gas; its improvements are; described spray orifice is made up of 10～30 Lavalle type gas spray orifices, and each gas spray orifice comprises contraction section, aditus laryngis and expansion segment, and they are proper alignment in nozzle body.
Above-mentionedly be used for the supersonic gas nozzle that molten slag carries out granulation, described a plurality of Lavalles type gas spray orifice is arranged with horizontal shape, " U " type shape or " H " type shape,
Above-mentionedly be used for the supersonic gas nozzle that molten slag carries out granulation, the distance between the described adjacent Lavalle gas spray orifice is 3～10mm.
The utlity model has following advantage:
(1) gas of each spray orifice outlet all is supersonic jet, have very strong impact kinetic energy, molten slag can be broken into the littler slag of granularity and drip, slag drips granularity can reduce to below the 1mm, thereby improve solution-air and gas-solid heat exchange efficiency, thereby improve the cooling intensity that slag drips;
(2) Lavalle type gas spray orifice is level, " U " type and " H " type layout, makes the outlet supersonic jet form rectangle, " U " type and " H " type stream thigh, encases from the effusive slag stream of slag trough and with its whole granulations;
(3) according to the characteristic of laval nozzle, the gas-jet exit separation of adjacent spray orifice is when 3～10mm, and the supersonic jet of gas spray orifice is stablized thereby the supersonic gas that guarantee effect flows in liquid slag flows a burst maintenance at 100～300mm apart from endomixis together;
(4) gas of each spray orifice outlet all be the supersonic jet temperature all below-100 ℃, thereby improved thermograde between the gas-liquid, the cooling intensity that the raising slag drips;
(5) flare angle of supersonic jet is less, and slag particle flight and the concentration degree height that falls behind down can reduce the capture range of slag particle, the width that slag particle is scattered than common gases nozzle granulation after the width that is scattered of slag particle reduce 1/3;
(6) this superonic flow nozzzle can independently be processed, and complete processing is simple, easy installation and removal.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2,3,4,5,6, the 7th, several Lavalle type gas spray orifice spread geometry figure.
Mark is as follows among the figure: nozzle body 1, spray orifice 2, nozzle chamber 3, pipe connecting 4
Embodiment
Fig. 1 is a kind of supersonic gas nozzle arrangements synoptic diagram that is used for the liquid metallurgical slag of granulation.Show among the figure that spray orifice is distributed in the front portion of nozzle body 1; Nozzle chamber 3 is high pressure buffer gas and stable space, at the middle part of nozzle body 1; Pipe connecting 4 one ends are connected with nozzle chamber 3, and the other end is connected with high pressure gas; Spray orifice 2 is a Lavalle type gas spray orifice, and each Lavalle gas spray orifice comprises contraction section, aditus laryngis and expansion segment.The design variable of Lavalle of the present utility model spray orifice: Mach number M=1.75, pressure 0.55MPa, operating pressure 0.50～0.65MPa, throat diameter 5.5mm, exit diameter 6.5mm.
Fig. 2,3,4,5,6, the 7th, several Lavalles of the present utility model spray orifice spread geometry synoptic diagram, the spacing of adjacent gas spray orifice is 3～10mm among the figure.
The Lavalle spray orifice of Fig. 2 is the individual layer level and lays; The Lavalle spray orifice of Fig. 3 is double-layer horizontal and lays; The Lavalle spray orifice of Fig. 4 is individual layer U type and lays; The Lavalle spray orifice of Fig. 5 is double-deck U type and lays; The Lavalle spray orifice of Fig. 6 is individual layer H type and lays; The Lavalle spray orifice of Fig. 7 is double-deck H type and lays.
The parameter of an embodiment of the present utility model is: nozzle body 1 horizontal clearance 300mm, height 130mm, Lavalle spray orifice 2 spacing 5mm, pipe connecting 4 internal diameter 102mm.
The utility model is in when work, and nozzle body 1 places under the slag trough, and the gas jet exit of quenching is 300mm apart from slag trough outlet vertical range, apart from the horizontal throw 300mm of slag stream.
When utilizing this superonic flow nozzzle liquid towards metallurgical slag to carry out granulation, at first open gas jet and form supersonic speed gas jetting, open slag trough then and go out interruption-forming slag stream; slag stream is with after supersonic jet contacts; can be crashed to pieces, be granulated into the following liquid slag of 1mm and drip, gas consumption is 20～30Nm
3/ t slag.
The flare angle of the supersonic jet that this nozzle provides is less, slag particle flight after the granulation and the concentration degree height that falls behind down, and the slag particle height of drop is 2m; the slag particle flying distance is when 6m; the expansion width is in 4m, and the following slag particle completely solidified that falls behind becomes shell, the bonding phenomenon between the particle do not occur.Illustrate when utilizing this supersonic gas nozzle liquid towards metallurgical slag to carry out granulation; can obtain the littler slag of granularity and drip, the heat exchange efficiency between melt cinder and the Gas Jet is higher, can condense into shell in the short period of time; the concentration degree height of slag particle flight simultaneously is convenient to the collection to the granulation slag particle.
Claims (5)
1. one kind is used for the supersonic gas nozzle that molten slag carries out granulation; it is made up of nozzle body [1], spray orifice [2], nozzle chamber [3], pipe connecting [4]; spray orifice [2] is distributed in the front portion of nozzle body [1]; nozzle chamber [3] is at the middle part of nozzle body [1]; pipe connecting [4] one ends are connected with nozzle chamber [3]; the other end is connected with high pressure gas; it is characterized in that: described spray orifice [2] is made up of 10～30 Lavalle type gas spray orifices; each gas spray orifice comprises contraction section, aditus laryngis and expansion segment, and they are proper alignment in nozzle body [1].
2. according to claim 1ly be used for the supersonic gas nozzle that molten slag carries out granulation, it is characterized in that: described Lavalle type gas spray orifice is arranged with horizontal shape.
3. according to claim 1ly be used for the supersonic gas nozzle that molten slag carries out granulation, it is characterized in that: described Lavalle type gas spray orifice is arranged with U type shape.
4. according to claim 1ly be used for the supersonic gas nozzle that molten slag carries out granulation, it is characterized in that: described Lavalle type gas spray orifice is arranged with H type shape.
5. describedly be used for the supersonic gas nozzle that molten slag carries out granulation according to claim 1,2,3 or 4, it is characterized in that: the distance between the adjacent Lavalle gas spray orifice is 3～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201022587U CN201400690Y (en) | 2009-04-09 | 2009-04-09 | Supersonic gas nozzle for granulating liquid molten slags |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201022587U CN201400690Y (en) | 2009-04-09 | 2009-04-09 | Supersonic gas nozzle for granulating liquid molten slags |
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| CN201400690Y true CN201400690Y (en) | 2010-02-10 |
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| CN2009201022587U Expired - Fee Related CN201400690Y (en) | 2009-04-09 | 2009-04-09 | Supersonic gas nozzle for granulating liquid molten slags |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831516A (en) * | 2010-05-28 | 2010-09-15 | 张登山 | Steel slag dry processing device and method |
| CN102690909A (en) * | 2012-05-31 | 2012-09-26 | 四川川润股份有限公司 | Gas breaking and granulating device for high-temperature liquid state blast-furnace slag |
| CN102732654A (en) * | 2012-07-11 | 2012-10-17 | 江苏东能环保能源科技有限公司 | Device and method for carrying out granulation treatment and residual heat utilization on liquid-state furnace slag |
| CN103639078A (en) * | 2013-11-19 | 2014-03-19 | 中国计量学院 | Fractal jet-flow jet nozzle array |
| CN105296691A (en) * | 2015-11-25 | 2016-02-03 | 南京圣诺热管有限公司 | High-temperature molten slag spraying granulating device |
| CN109338022A (en) * | 2018-12-10 | 2019-02-15 | 凉山瑞京环保资源开发有限公司 | High-temperature liquid state steel slag is atomized Laval nozzle, atomization bellows and atomization method |
| CN110006696A (en) * | 2019-05-14 | 2019-07-12 | 中冶赛迪技术研究中心有限公司 | Robot thermometric sampling gun from cooling means |
| CN110218099A (en) * | 2019-07-20 | 2019-09-10 | 兰州理工大学 | A kind of method that nickel fibers high-temperature slag prepares magnetic hollow ceramic microsphere |
| CN110218100A (en) * | 2019-07-20 | 2019-09-10 | 兰州理工大学 | A kind of method that nickel-iron smelting high-temperature slag prepares hollow ceramic microspheres |
| CN111979366A (en) * | 2020-08-25 | 2020-11-24 | 山东盛阳工程机械有限公司 | Liquid steel slag wind quenching and granulating production line and production process thereof |
| CN113816337A (en) * | 2021-10-25 | 2021-12-21 | 上海驰春节能科技有限公司 | Device and method for preparing hydrogen by reforming natural gas steam based on sensible heat of liquid metallurgical slag |
| CN115418420A (en) * | 2022-09-26 | 2022-12-02 | 马鞍山钢铁股份有限公司 | Treatment device and treatment method for improving wind breaking and slagging of steel slag |
-
2009
- 2009-04-09 CN CN2009201022587U patent/CN201400690Y/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831516A (en) * | 2010-05-28 | 2010-09-15 | 张登山 | Steel slag dry processing device and method |
| CN102690909A (en) * | 2012-05-31 | 2012-09-26 | 四川川润股份有限公司 | Gas breaking and granulating device for high-temperature liquid state blast-furnace slag |
| CN102690909B (en) * | 2012-05-31 | 2013-12-18 | 四川川润股份有限公司 | Gas breaking and granulating device for high-temperature liquid state blast-furnace slag |
| CN102732654A (en) * | 2012-07-11 | 2012-10-17 | 江苏东能环保能源科技有限公司 | Device and method for carrying out granulation treatment and residual heat utilization on liquid-state furnace slag |
| CN103639078A (en) * | 2013-11-19 | 2014-03-19 | 中国计量学院 | Fractal jet-flow jet nozzle array |
| CN103639078B (en) * | 2013-11-19 | 2016-03-30 | 中国计量学院 | A kind of Fractal jet-flow jet nozzle array |
| CN105296691A (en) * | 2015-11-25 | 2016-02-03 | 南京圣诺热管有限公司 | High-temperature molten slag spraying granulating device |
| CN109338022A (en) * | 2018-12-10 | 2019-02-15 | 凉山瑞京环保资源开发有限公司 | High-temperature liquid state steel slag is atomized Laval nozzle, atomization bellows and atomization method |
| CN110006696A (en) * | 2019-05-14 | 2019-07-12 | 中冶赛迪技术研究中心有限公司 | Robot thermometric sampling gun from cooling means |
| CN110218099A (en) * | 2019-07-20 | 2019-09-10 | 兰州理工大学 | A kind of method that nickel fibers high-temperature slag prepares magnetic hollow ceramic microsphere |
| CN110218100A (en) * | 2019-07-20 | 2019-09-10 | 兰州理工大学 | A kind of method that nickel-iron smelting high-temperature slag prepares hollow ceramic microspheres |
| CN111979366A (en) * | 2020-08-25 | 2020-11-24 | 山东盛阳工程机械有限公司 | Liquid steel slag wind quenching and granulating production line and production process thereof |
| CN111979366B (en) * | 2020-08-25 | 2024-02-13 | 山东盛阳工程机械有限公司 | Liquid steel slag air quenching granulating production line and production process thereof |
| CN113816337A (en) * | 2021-10-25 | 2021-12-21 | 上海驰春节能科技有限公司 | Device and method for preparing hydrogen by reforming natural gas steam based on sensible heat of liquid metallurgical slag |
| CN113816337B (en) * | 2021-10-25 | 2023-01-31 | 上海驰春节能科技有限公司 | Device and method for preparing hydrogen by reforming natural gas steam based on sensible heat of liquid metallurgical slag |
| CN115418420A (en) * | 2022-09-26 | 2022-12-02 | 马鞍山钢铁股份有限公司 | Treatment device and treatment method for improving wind breaking and slagging of steel slag |
| CN115418420B (en) * | 2022-09-26 | 2023-07-25 | 马鞍山钢铁股份有限公司 | Treatment device and treatment method for improving wind-break slagging of steel slag |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TANGSHAN IRON AND STEEL GROUP CO., LTD. |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Junguo Inventor after: Han Zhijie Inventor after: Xing Hongwei Inventor after: Hu Changqing Inventor after: Long Yue Inventor after: Zhang Yuzhu Inventor after: Zhang Chengrui Inventor before: Li Junguo Inventor before: Han Zhijie Inventor before: Xing Hongwei Inventor before: Hu Changqing Inventor before: Long Yue Inventor before: Zhang Yuzhu |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LI JUNGUO HAN ZHIJIE XING HONGWEI HU ZHANGQING LONG YUE ZHANG YUZHU TO: LIJUNGUO HAN ZHIJIE XING HONGWEI HU ZHANGQING LONG YUE ZHANG YUZHU ZHANG CHENGRUI |
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| TR01 | Transfer of patent right |
Effective date of registration: 20101130 Address after: 063009 Hebei province Tangshan City Xinhua West Road No. 46 Hebei Polytechnic University Co-patentee after: Tangshan Iron and Steel Group Co., Ltd. Patentee after: Hebei Univ. of Science & Technology Address before: 063009 Hebei province Tangshan City Xinhua West Road No. 46 Hebei Polytechnic University Patentee before: Hebei Univ. of Science & Technology |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100210 Termination date: 20100409 |