CN107586900A - A kind of method and device of spray-granulated molten blast furnace slag - Google Patents
A kind of method and device of spray-granulated molten blast furnace slag Download PDFInfo
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- CN107586900A CN107586900A CN201710724995.XA CN201710724995A CN107586900A CN 107586900 A CN107586900 A CN 107586900A CN 201710724995 A CN201710724995 A CN 201710724995A CN 107586900 A CN107586900 A CN 107586900A
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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
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Abstract
The invention discloses a kind of method and device of spray-granulated molten blast furnace slag; including mixing two phase flow device in liquid slag slag chute, molten bath and venturi type; molten bath outlet connects the top liquid slag entrance that two phase flow device is mixed in venturi type by pipeline; liquid slag entry bottom connects receiving chamber; connection high-temperature flue gas entry on the inside of contraction type feed nozzle; high-temperature flue gas entry is by the outlet of pipeline communication air compressor machine, the gas outlet at the top of the entrance connection molten bath of air compressor machine；Receiving chamber outlet connects one end of mixing chamber by mixing chamber inlet, the other end connection atomization hybrid chamber of mixing chamber, it is atomized hybrid chamber and external air blower, high-pressure hydraulic pump is distinguished by atomizing air inlets, atomization water inlet, the exit for being atomized hybrid chamber is provided with atomizer；Simple in construction, movement-less part of the invention, suitable operation steady in a long-term, a little repair, the reasonable utilization of convenient use, the mainly recovery to high-temperature molten slag and waste heat, realizes and maximizes interests.
Description
Technical field
The present invention relates to molten blast furnace slag pelletization device technical field, more particularly to a kind of spray-granulated molten blast furnace slag
Method and device.
Background technology
Molten blast furnace slag particleization can be divided into two kinds of wet type, dry type, and what wet granulation was taken is the side of water quenching granulating liquid slag
Method, it is granulated, and effect is good, and vitreum content is high, and crystallinity is low, beneficial to being filled in cement and concrete, but melts the aobvious of high temperature sludge
Heat and latent heat can not recycle, and consume substantial amounts of water during water quenching, dry the moisture in grain slag during grinding again.
The method that dry granulation carried out the quenching dry type granulated blast-furnace slag of commerical test has roller rotary drum method, wind quenching method
With centrifugal granulation method, chemical shotting；Drum process is not high there is disposal ability, equipment operation rate, crushes the ability of liquid slag
Deficiency, broken slag particle particle size distribution range is big, and small with the heat exchange area of heat transferring medium, heat exchange efficiency is low, cooling velocity deficiency,
Grain slag vitreum content is low；Wind quenching method granulation liquid slag particle size range is too wide, and air cooling slag speed is slow, causes power consumption
Greatly, equipment size is huge, and centrifugal granulation method has granulation epigranular, and particle size distribution is narrow, and flow losses are small, is currently to compare
Relatively good granulating method；But its requirement to mechanical energy is higher, and rotating speed is higher, granulation is better, and this causes motor and rotating shaft
Stability proposes requirements at the higher level, and especially in the event of high temperatures, and its centrifugal granulation cone angle is larger, is not easy to be situated between with heat exchange
The heat exchange of matter.
Above-mentioned dry granulation technique and have ignored its huge heat included in the prevalence of the utilization for paying attention to blast furnace cinder
Energy.The characteristics of molten blast furnace slag is：1st, high-temperature fusion liquid（1400—1600℃）；2nd, drastically increase as temperature reduces its viscosity
It is high；3rd, liquid slag thermal conductivity factor is low（0.1—0.3W(m/K).
The technical requirements of UTILIZATION OF VESIDUAL HEAT IN dry granulation are：1st, high-temperature molten slag can be made to be granulated granulation granularity as small as possible；
2nd, the sensible heat and latent heat of liquid slag can efficiently be reclaimed；3rd, the operation of energy continuous-stable；4th, the slag after granulation cooling should crystallize
It is high to spend low vitreum content, does not influence the use in cement and concrete.
The difficult point of dry granulation technology is that the liquid of high-temperature fusion will be granulated as far as possible in the case where viscosity does not increase
Small granulation granularity, because liquid slag pyroconductivity is very low, it is necessary to the size of grain slag be reduced, to strengthen cooling effect as far as possible
Fruit, it is easy to later use.So to take into account the cooldown rate and waste heat recovery effect of grain slag.
The content of the invention
It is an object of the invention to provide high-temperature molten slag method spray-granulated with high-temperature gas under liquid condition and dress
Put, to realize that granulation granularity in below 1mm, increases heat exchange area, strengthens cooldown rate, reach waste heat recovery and cooling effect,
Solves the granulation problem of dry granulation.
In order to solve the above-mentioned technical problem, the invention provides following technical scheme：
The present invention provides a kind of method and device of spray-granulated molten blast furnace slag, including liquid slag slag chute, molten bath and venturi
Two phase flow device is mixed in formula, liquid slag slag chute connection molten bath entrance, molten bath outlet is connected by pipeline mixes two-phase in venturi type
Flow the top liquid slag entrance of device, liquid slag entry bottom connection receiving chamber, the external contraction type feed spray of entrance of receiving chamber
Mouth, contraction type feed nozzle inner side connection high-temperature flue gas entry, high-temperature flue gas entry passes through the outlet of pipeline communication air compressor machine, empty
Gas outlet at the top of the entrance connection molten bath of press；Receiving chamber outlet connects one end of mixing chamber, mixing by mixing chamber inlet
The other end connection atomization hybrid chamber of room, atomization hybrid chamber upper and lower ends are respectively arranged with atomizing air inlets, atomization water inlet,
It is atomized hybrid chamber and external air blower, high-pressure hydraulic pump is distinguished by atomizing air inlets, atomization water inlet, is atomized the outlet of hybrid chamber
Place is provided with atomizer.
As a preferred technical solution of the present invention, the pressure of air compressor machine compression high-temperature flue gas is 150-700KPa.
As a preferred technical solution of the present invention, the outlet blast of air blower is 29KPa.
Two phase flow bottom of device, which is mixed, as a preferred technical solution of the present invention, in venturi type is provided with Si-Mo rod.
As a preferred technical solution of the present invention, molten bath side is fixedly installed burner, burner external power supply.
Liquid slag in liquid slag slag chute of the present invention is flowed into molten bath, and molten bath has certain volume, is easy to storage certain
The liquid slag of amount, avoid because blast furnace be interrupted slagging and caused by produce interruption, separately liquid slag in molten bath is added by burner
Heat, insulation, it is ensured that the viscosity and mobility of liquid slag, and the liquid slag with certain viscosity and mobility flows into literary mound through pipeline
Li Shinei is mixed in two phase flow device；High-temperature flue gas caused by burning enters air compressor machine through molten bath top exit in molten bath, through sky
High-temperature flue gas entry of the press compression into the high-temperature flue gas with certain pressure intensity by mixed two phase flow device side in venturi type
The contraction type feed nozzle of entrance；Sprayed from contraction type feed nozzle at high speeds, high velocity air passes through receiving chamber, and high velocity air is connecing
The pressure that interior causes to be equal to or less than atmospheric pressure is received, is connect so that liquid slag liquid falls into or is inhaled into from liquid slag entrance
Receive in room, entered in company with high velocity air by mixing chamber inlet in mixing chamber, liquid slag liquid and high velocity air are in mixing chamber
Enter atomization hybrid chamber after being further well mixed, and and two-phase is then mixed into venturi type from air blower, high-pressure hydraulic pump respectively
Flow the atomizing air conveyed in the entrance of the atomization hybrid chamber of device, atomized water to spray from atomizer high speed together, its speed
Degree makes liquid slag be atomized into fine mist up to supersonic speed；And Si-Mo rod is to mixing two phase flow device during this period in venturi type
Heated, be incubated, it is ensured that liquid slag mixes the liquid phase state in two phase flow device in venturi type.
The beneficial effect that is reached of the present invention is：
1st, simple in construction, movement-less part of the invention, suitable operation steady in a long-term, a little repair, convenient use, mainly to height
The recovery of warm liquid slag and the reasonable utilization of waste heat, realize and maximize interests；Liquid slag by preheating, heating, being incubated, from begin to
It is always the liquid of flowing eventually, its viscosity does not influence its mobility, and two-phase flow atomization device is mixed in venturi type until spraying；
Although having preheating, heating and heat-insulation system, this partial heat in Venturi simultaneously to exchange heat with liquid slag and wind,
There is no heat loss；
2nd, the liquid slag of presentation liquid phase is easy in mixed two-phase flow atomization device in venturi type and high-temperature flue gas, air mix
Biphase gas and liquid flow is formed, mixes, sprays twice twice, velocity of sound liquid slag is accelerated to and is atomized into uniform droplet less than 1mm, mist
The particle diameter that change is formed is small, and surface area is big, that is, heat exchange area is high, and heat exchange rate is high, enhances pyroconductivity；And heat exchange rate
Height, liquid slag can be by chillings, and vitreum content is high, is more beneficial for subsequently using；
3rd, Venturi nozzle is that gas liquid ratio is adjustable, that is to say, that can have the high material-gas ratio of comparison, save compressed air, compare
Power consumption is few.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
Apply example to be used to explain the present invention together, be not construed as limiting the invention.
In the accompanying drawings：
Fig. 1 is that two phase flow device internal structure schematic diagram is mixed in venturi type of the present invention；
Fig. 2 is overall structure diagram of the present invention；
Label in figure：1st, liquid slag slag chute；2nd, molten bath；3rd, molten bath heating, thermal insulation combustor；4th, two phase flow dress is mixed in venturi type
Put；4-1, high-temperature flue gas entry；4-2, contraction type feed nozzle；4-3, receiving chamber；4-4, liquid slag entrance；4-5, mixing chamber enter
Mouthful；4-6, mixing chamber；4-7, atomizing air inlets；4-8, atomization water inlet；4-9, atomization hybrid chamber；4-10, atomizer；5、
Air compressor machine；6th, air blower；7th, high-pressure hydraulic pump；8th, Si-Mo rod.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments, is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Fig. 1-2 is referred to, the present invention discloses a kind of technical scheme：A kind of method and dress of spray-granulated molten blast furnace slag
Put, including liquid slag slag chute（1）, molten bath（2）With mixed two phase flow device in venturi type（4）, liquid slag slag chute（1）Connect molten bath
（2）Entrance, molten bath（2）Outlet is connected by pipeline and two phase flow device is mixed in venturi type（4）Top liquid slag entrance（4-
4）, liquid slag entrance（4-4）Bottom connects receiving chamber（4-3）, receiving chamber（4-3）Entrance external contraction type feed nozzle（4-
2）, contraction type feed nozzle（4-2）Inner side connects high-temperature flue gas entry（4-1）, high-temperature flue gas entry（4-1）Pass through pipeline communication
Air compressor machine（5）Outlet, air compressor machine（5）Entrance connection molten bath（2）The gas outlet at top；Receiving chamber（4-3）Outlet passes through mixed
Close chamber inlet（4-5）Connect mixing chamber（4-6）One end, mixing chamber（4-6）The other end connection atomization hybrid chamber（4-9）, mist
Change hybrid chamber（4-9）Upper and lower ends are respectively arranged with atomizing air inlets（4-7）, atomization water inlet（4-8）, it is atomized hybrid chamber
（4-9）Pass through atomizing air inlets（4-7）, atomization water inlet（4-8）Air blower is connected respectively（6）, high-pressure hydraulic pump（7）, atomization
Hybrid chamber（4-9）Exit be provided with atomizer（4-10）.The invention provides high-temperature molten slag in liquid Direct spraying
The system and device of granulation, including three parts：When regenerator section, second, liquid slag heating, insulating sections, third, atomising device
Part.Regenerator section is to be arranged on the Si-Mo rod 8 that molten bath 2, associated conduit and atomising device are preheated；Liquid slag heating, protect
Isothermal segment is provided in the burner 3 of burning or heated by electrodes in molten bath 2；Atomising device part includes the compression internal combustion of molten bath 2
Burn the air compressor machine 5 that high-temperature flue gas is supplied to atomising device, there is provided the equipment air blower of the wind and water of secondary-atomizing and cooling effect
6th, two-phase flow atomization device 4 is mixed in high-pressure hydraulic pump 7, and venturi type.The high temperature cigarette for heating and being incubated to liquid slag in molten bath 2
Gas makes high-temperature flue gas be pressurized to 150-700KPa by air compressor machine 5, is sent in venturi type and mixes two-phase flow atomization device 4, as
Jet high-temperature gas；The entrance wind-warm syndrome of air blower 6 is less than atmospheric temperature, fan outlet blast 29KPa, as in venturi type
Cooling air after the secondary jet of mixed two-phase flow atomization device and atomization ejection；High-pressure hydraulic pump 7, water under high pressure is in venturi type
With the air mixing atomizing ejection of secondary jet in mixed two-phase flow atomization device 4, liquid slag is cooled down.
Molten bath（2）Side is fixedly installed burner（3）, burner（3）External power supply；Two phase flow dress is mixed in venturi type
Put（4）Bottom is provided with Si-Mo rod（8）, two-phase flow atomization device 4 and associated conduit are mixed in molten bath 2, venturi type through silicon molybdenum
Rod（8）1200 DEG C are preheating to, 1200 DEG C of molten bath 2 is preheated and liquid slag, the combustion that molten bath 2 is provided with is received by liquid slag slag chute 1
Burner 3 is heated and is incubated to liquid slag, liquid slag is maintained the temperature at 1400 DEG C or so, viscosity control 0.075-
0.1Pa.s, the temperature of liquid slag is controlled according to the viscosity of liquid slag.
Operation principle：
Liquid slag in liquid slag slag chute 1 of the present invention is flowed into molten bath 2, and molten bath 2 has certain volume, is easy to store a certain amount of
Liquid slag, avoid because blast furnace be interrupted slagging and caused by produce interruption, separately liquid slag in molten bath is added by burner 3
Heat, insulation, it is ensured that the viscosity and mobility of liquid slag, and the liquid slag with certain viscosity and mobility flows into literary mound through pipeline
Li Shinei is mixed in two phase flow device 4；High-temperature flue gas caused by burning enters air compressor machine 5 through the top exit of molten bath 2 in molten bath 2,
High temperature cigarette of the high-temperature flue gas with certain pressure intensity by the mixed side of two phase flow device 4 in venturi type is compressed into through air compressor machine 5
The contraction type feed nozzle 4-2 that gas entrance 4-1 enters；Sprayed at a high speed from contraction type feed nozzle 4-2, high velocity air is by receiving
Room 4-3, high velocity air cause the pressure equal to or less than atmospheric pressure in receiving chamber 4-3, so that liquid slag liquid is from melting
Slag entrance 4-4 is fallen into or is inhaled into receiving chamber 4-3, enters mixing chamber 4-6 by mixing chamber inlet 4-5 in company with high velocity air
In, liquid slag liquid and high velocity air enter atomization hybrid chamber 4-9 after being further well mixed in mixing chamber 4-6, and and by
Air blower 6, high-pressure hydraulic pump 7 then mix what is conveyed in the atomization hybrid chamber 4-9 of two phase flow device 4 entrance into venturi type respectively
Atomizing air, atomized water spray from atomizer 4-10 high speeds together, and its speed makes liquid slag be atomized into carefully up to supersonic speed
Small droplet；And Si-Mo rod 8 is heated to mixing two phase flow device 4 in venturi type, is incubated during this period, it is ensured that liquid slag is in text
Qiu Lishinei mixes the liquid phase state in two phase flow device 4.
Finally it should be noted that：The preferred embodiments of the present invention are these are only, are not intended to limit the invention, although
The present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can be right
Technical scheme described in foregoing embodiments is modified, or carries out equivalent substitution to which part technical characteristic.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc., the protection of the present invention should be included in
Within the scope of.
Claims (6)
1. a kind of method and device of spray-granulated molten blast furnace slag, it is characterised in that including liquid slag slag chute（1）, molten bath（2）
With mixed two phase flow device in venturi type（4）, liquid slag slag chute（1）Connect molten bath（2）Entrance, molten bath（2）Outlet passes through pipeline
Connect and two phase flow device is mixed in venturi type（4）Top liquid slag entrance（4-4）, liquid slag entrance（4-4）Bottom connection connects
Receive room（4-3）, receiving chamber（4-3）Entrance external contraction type feed nozzle（4-2）, contraction type feed nozzle（4-2）Inner side connects
Connect high-temperature flue gas entry（4-1）, high-temperature flue gas entry（4-1）Pass through pipeline communication air compressor machine（5）Outlet, air compressor machine（5）'s
Entrance connects molten bath（2）The gas outlet at top；Receiving chamber（4-3）Outlet passes through mixing chamber inlet（4-5）Connect mixing chamber（4-6）
One end, mixing chamber（4-6）The other end connection atomization hybrid chamber（4-9）, it is atomized hybrid chamber（4-9）Upper and lower ends are set respectively
There are atomizing air inlets（4-7）, atomization water inlet（4-8）, it is atomized hybrid chamber（4-9）Pass through atomizing air inlets（4-7）, atomization
Water inlet（4-8）External air blower respectively（6）, high-pressure hydraulic pump（7）, it is atomized hybrid chamber（4-9）Exit be provided with atomization spray
Mouth（4-10）.
A kind of 2. method and device of spray-granulated molten blast furnace slag, it is characterised in that：
Liquid slag slag chute of the present invention（1）In liquid slag flow into molten bath（2）In, molten bath（2）With certain volume, it is easy to store
A certain amount of liquid slag, avoid because blast furnace be interrupted slagging and caused by produce interruption, separately pass through burner（3）To liquid slag in molten bath
Heated, be incubated, it is ensured that the viscosity and mobility of liquid slag, and the liquid slag with certain viscosity and mobility is through pipeline stream
Enter and two phase flow device is mixed in venturi type（4）In；In molten bath（2）High-temperature flue gas is through molten bath caused by interior burning（2）Top exit
Into air compressor machine（5）, through air compressor machine（5）The high-temperature flue gas with certain pressure intensity is compressed into fill by mixing two phase flow in venturi type
Put（4）The high-temperature flue gas entry of side（4-1）The contraction type feed nozzle of entrance（4-2）；Nozzle is fed from contraction type（4-2）It is high
Speed sprays, and high velocity air passes through receiving chamber（4-3）, high velocity air is in receiving chamber（4-3）Inside cause equal to or less than atmospheric pressure
Pressure, so that liquid slag liquid is from liquid slag entrance（4-4）Fall into or be inhaled into receiving chamber（4-3）In, in company with high speed gas
Stream passes through mixing chamber inlet（4-5）Into mixing chamber（4-6）In, liquid slag liquid and high velocity air are in mixing chamber（4-6）Inside enter
Enter atomization hybrid chamber after one step is well mixed（4-9）, and and by air blower（6）, high-pressure hydraulic pump（7）Then respectively to venturi type
Interior mixed two phase flow device（4）Atomization hybrid chamber（4-9）Entrance in convey atomizing air, atomized water is together from atomizer
（4-10）High speed sprays, and its speed makes liquid slag be atomized into fine mist up to supersonic speed；And Si-Mo rod during this period（8）
To mixing two phase flow device in venturi type（4）Heated, be incubated, it is ensured that liquid slag mixes two phase flow device in venturi type
（4）Interior liquid phase state.
A kind of 3. method and device of spray-granulated molten blast furnace slag according to claim 1, it is characterised in that air compressor machine
（5）The pressure for compressing high-temperature flue gas is 150-700KPa.
A kind of 4. method and device of spray-granulated molten blast furnace slag according to claim 1, it is characterised in that air blower
（6）Outlet blast be 29KPa.
A kind of 5. method and device of spray-granulated molten blast furnace slag according to claim 1, it is characterised in that venturi
Two phase flow device is mixed in formula（4）Bottom is provided with Si-Mo rod（8）.
A kind of 6. method and device of spray-granulated molten blast furnace slag according to claim 1, it is characterised in that molten bath
（2）Side is fixedly installed burner（3）, burner（3）Extraneous power supply.
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| CN201710724995.XA CN107586900B (en) | 2017-08-22 | 2017-08-22 | A kind of method and device of spray-granulated molten blast furnace slag |
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| CN107586900A true CN107586900A (en) | 2018-01-16 |
| CN107586900B CN107586900B (en) | 2019-03-29 |
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| CN111218533A (en) * | 2020-01-08 | 2020-06-02 | 西安建筑科技大学 | A kind of steel slag resource processing method |
| CN111500804A (en) * | 2020-06-01 | 2020-08-07 | 上海驰春节能科技有限公司 | Device and method for producing steel slag powder by using liquid steel slag |
| CN111847465A (en) * | 2020-08-31 | 2020-10-30 | 蚌埠中恒新材料科技有限责任公司 | Silica hollow sphere, its preparation method and its application |
| CN114014565A (en) * | 2021-11-16 | 2022-02-08 | 上海驰春节能科技有限公司 | Device and method for preparing cement and co-producing sulfuric acid by high-temperature liquid blast furnace slag in cooperation with phosphogypsum/desulfurized gypsum |
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