CN105907911B - A kind of direct reduced iron by rotary hearth furnace hot water quenching device and method - Google Patents
A kind of direct reduced iron by rotary hearth furnace hot water quenching device and method Download PDFInfo
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- CN105907911B CN105907911B CN201610431526.4A CN201610431526A CN105907911B CN 105907911 B CN105907911 B CN 105907911B CN 201610431526 A CN201610431526 A CN 201610431526A CN 105907911 B CN105907911 B CN 105907911B
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- rotary hearth
- hearth furnace
- reduced iron
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
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Abstract
The present invention provides a kind of hot water quenching device of the direct reduced iron to rotary hearth furnace processing iron content solid waste production, including rotary hearth furnace, lateral tubular centrifuge dehumidifier, rushes hot DRI elephant trunks, hot-tub, hopper, storage bin, collecting-tank positioned at the first conveying device of hopper output terminal, below the first conveying device output terminal etc.；It rushes hot DRI elephant trunks material is sent into the cylinder cavity in lateral tubular centrifuge dehumidifier；The inlet that hot DRI elephant trunks enter a cavity is equipped with the high-pressure water heating nozzle for connecting hot-tub, with the cooling of the direct reduced iron produced to rotary hearth furnace, finally to meet the requirement that electric furnace steel making direct reduced iron makees cooling agent.
Description
Technical field
This patent is related to the rotary hearth furnace production direct reduced iron field of iron content fixed-end forces, is reduced directly suitable for rotary hearth furnace
The hot Water Quenching of iron.
Background technology
For a long time, the development of Chinese electric steel production is constrained the problems such as electric furnace steel making source of iron raw material.It is domestic current
Electric furnace steel making source of iron raw material is mainly derived from import steel scrap, pig iron, heating molten steel and direct reduced iron.Wherein, direct reduced iron
Irony is pure, and carbon content is low, and continuous charging mode can be used, and can play electric furnace steel making ability to greatest extent, be high-quality
The best residual elements diluent of electric furnace steel making and ferrous source material.
" carbon-based rotary hearth furnace+mill ore magnetic selection " produces high Iron grade Direct Reducing Iron Process, can low-grade, the difficult choosing for China
The present situation that smelting iron ore and a large amount of metallurgical dust solid wastes of iron and steel metallurgy enterprise are difficult to be utilized, and based on China using coal as main energy
The fundamental realities of the country of source consumption, using carbon-burdened pellet or agglomerate as raw material, under 1250~1350 DEG C of hot environments, by 20~
The reduction treatment of 40min first obtains direct reduced iron pelletizing (DRI) of the degree of metalization up to more than 60%, through supercooling, ore grinding,
After magnetic separation, it can eliminate incorporation coal ash and solid waste iron-bearing material is introduced into gangue and S in direct reduced iron, acquisition Iron grade is up to 90%
More than, more than 80% iron recovery, density ＞ 2t/m3High-grade direct-reduction iron block, it is direct effectively to meet electric furnace steel making
The requirement of reduced iron." carbon-based rotary hearth furnace+mill ore magnetic selection " production Direct Reducing Iron Process gradually pushes away at home at present
Extensively, and certain effective economic well-being of workers and staff is achieved.
" carbon-based rotary hearth furnace+mill ore magnetic selection " produces Direct Reducing Iron Process, since the temperature of charge of rotary hearth furnace discharge reaches
1000 DEG C, it is necessary to after being cooled down, transport could be implemented, mill ore magnetic selection is carried out, to obtain the direct-reduction iron block of high Iron grade.
Implement the cooling of high-temperature material produced to rotary hearth furnace, mainly take two ways at this stage, one kind is water quenching side
Formula, one kind are air cooling modes.Water quenching method, heat transfer intensity is big, efficient, and equipment investment and construction cost are low, is to build at present
Unit is mainly by the way of；Air cooling mode is mainly exchanged heat using steam and nitrogen, and heat transfer intensity is relatively low, steam and nitrogen
Gas heat is needed to rechange heat drop temperature and could be recycled, and dielectric dissipation is high, and equipment investment and construction cost are high, payoff period compared with
It is long, and production stability is poor, technical aspect need further perfect.
Existing rank implement the particular technique of high-temperature direct reduced iron pelletizing that water quenching cooling is discharged from rotary hearth furnace introduce it is less, often
Rule technology path is by rotary hearth furnace discharge machinery, by high-temperature material by elephant trunk, is discharged into the swimmer's pool of rotary hearth furnace side, and
It will be cooled down and expected using dragveyer tool, is transported in the storage warehouse of ground, to transport.
There are the problem of have：
(1) since dragveyer tool tail portion is placed in swimmer's pool, equipment is impregnated in the hot water, and ageing equipment is serious；
(2) the fine slag grain of water quenching breakage is difficult to be removed by dragveyer in time clean, easily accumulates bottom of pond；
(3) swimmer's pool bottom is crowded with cooling material, and the pushing to dragveyer tool tail portion pedestal easily causes equipment stuck, increases
Resistance in operation process, the failure rate of equipment operation is higher, and pedestal overhauls difficulty in swimmer's pool, it is difficult to meet continuous metaplasia
Production requirement.
It is therefore desirable to propose that a kind of new technical solution solves problem above.
Invention content
A kind of hot water of the direct reduced iron to rotary hearth furnace processing iron content solid waste production is provided to quench treatment process
And device, to realize the cooling of direct reduced iron, convenient for conveying, ore grinding, magnetic separation and briquetting, finally to meet electric furnace steel making use
Direct reduced iron makees the requirement of cooling agent.
In order to achieve the above objectives, following technical solution can be used in the present invention：
A kind of direct reduced iron by rotary hearth furnace hot water quenching device, including rotary hearth furnace, hot-tub, the precipitation connected with hot-tub
Pond, the lateral tubular centrifuge dehumidifier on hot-tub, the cylinder cavity for extending into from rotary hearth furnace lateral tubular centrifuge dehumidifier
Interior hot DRI elephant trunks, the hopper being similarly positioned in a cavity, the first conveying device below hopper output terminal, positioned at
Storage bin below one conveying device output terminal, the second conveying device below bin stock bin discharge port external are conveyed positioned at second
Collecting-tank below device output terminal；Hot DRI elephant trunks enter the high-pressure water heating that the inlet in a cavity is equipped with connection sedimentation basin
Nozzle；The high-pressure water heating nozzle is also extended into the cylinder cavity.
Further, the lower part of the lateral tubular centrifuge dehumidifier is located in the hot water in hot-tub；Lateral tubular
Centrifuge dehumidifier circumference is provided inwardly with grid strainer；The hopper output terminal extends a cavity.
Further, it is covered with vapour hood above the hot-tub and lateral tubular centrifuge dehumidifier；On the vapour hood
Side is equipped with steam smoke exhaust barrel, and steam smoke exhaust barrel is connected with vapour hood；The cooling on vapour hood top is additionally provided in the vapour hood
Sprinkler head.
Further, the first return water canal is equipped with below first conveying device, the backwater end of the first return water canal is located at heat
On pond；The second return water canal is equipped with below second conveying device, recycling second is additionally provided at the backwater end of the second return water canal
The collecting-tank of recirculation water in return water canal.
Further, the reversible tape machine being additionally provided with below the second conveying device, the both ends lower section of reversible tape machine
It is equipped with storage bin entrance.
Further, high-pressure water heating nozzle is connect with sedimentation basin by heat-exchanger pump；Water intaking nozzle, pipe are equipped with above sedimentation basin
End is equipped with filter screen, intake pipe and heat-exchanger pump inlet communication；The collecting-tank equally with heat-exchanger pump inlet communication.
Further, hopper lower output side bottom is equipped with grid filter plate.
Advantageous effect：Compared with prior art, beneficial effects of the present invention include：
(1) the 1000 DEG C of direct reduced iron pelletizings discharged based on water quenching method cooling from rotary hearth furnace, are reduced directly after cooling
Iron ball group is controlled at~100 DEG C, moisture content~15%；System circulation hot water temperature is 60~80 DEG C；
(2) material absorption water, and water circulation rate~95% are removed；Inclined conveyor belt rack on return water canal, and
Channel low spot sets pushing off the slag filter plate, further recycles the table water being precipitated from zone face, reduces the loss of system water；
(3) high-temperature material completes part cooling in dehydrator, and implements to transport by dehydrator；Dehydrator is axial by grid
Strainer is made, and the oblique elephant trunk bottom of hopper is made of grid filter plate, convenient for the reflux of material table water；
(4) dehydrator surrounding is made of grid strainer, enables a system to receive to obtain direct-reduction after cooling to the maximum extent
Iron ball group avoids prior art water quenching fine slag grain from being deposited in hot-tub, and the problem of more difficult is recycled to slag particle；
(5) compared with prior art, drive system facility is placed on hot-tub, and it is convenient that maintenance is replaced, and operating rate is high.
And on the basis of above-mentioned rotary hearth furnace is reduced directly hot iron granulating unit, invention additionally discloses the users of the device
Method, the technical solution of the application method are：
The high-temperature direct reduced iron of rotary hearth furnace production is through hot DRI elephant trunks, in the cylinder cavity of lateral tubular centrifuge dehumidifier, institute
It states high-pressure water heating nozzle and sprays high-pressure water heating by high-temperature direct reduced iron chilling, horizontal stroke of the high-temperature direct reduced iron in hot water is submerged
Cooling material is further cooled into tubular centrifuge dehumidifier lower end；Lateral tubular centrifuge dehumidifier circle slough it is cold
But the table water of material, cooling material are dropped to from the top of lateral tubular centrifuge dehumidifier in hopper, and feeding slot is unloaded to first defeated
It send on device, and transports and be discharged into storage bin；Cooling material from storage bin unload in the second conveying device to by cooling thing
Material transports.
Further, the high pressure water hydraulic pressure that high-pressure water heating nozzle sprays is 0.1~0.2MPa, and water quality is turbid circulating water, water temperature
It is 60~80 DEG C；Dehydrator circular motion speed is 1~5r/min.
Further, the steam generated during the water quenching cooling of high-temperature direct reduction pelletizing is discharged into steam smoke exhaust barrel,
Steam smoke exhaust barrel top is provided with water-cooling-sprayer, for steam cooling, re-forms liquid water, is back in hot-tub；And
And the excessive effluent collection in the first conveying device and the second conveying device is repeated by profit by the first return water canal, the second return water canal
With.
Description of the drawings
Fig. 1 is the structure diagram of direct reduced iron by rotary hearth furnace hot water quenching device of the present invention.
Specific embodiment
Technical scheme of the present invention is further described below in conjunction with the accompanying drawings.
As shown in Figure 1, the present invention discloses a kind of direct reduced iron by rotary hearth furnace hot water quenching device, including rotary hearth furnace 1, rotary hearth furnace
Discharge mechanism 2, hot-tub 11, the sedimentation basin 12 connected with hot-tub 11, the lateral tubular centrifugal dehydration on hot-tub 11
Device 4, is similarly positioned in a cavity the hot DRI elephant trunks 3 extended into the cylinder cavity of lateral tubular centrifuge dehumidifier 4 from rotary hearth furnace 1
Hopper 5, the first conveying device 6 (being in the present embodiment sealing-tape machine 6) below 5 output terminal of hopper, positioned at first
Storage bin 8 below 6 output terminal of conveying device, the second conveying device 10 below 8 discharge port of storage bin are (in this embodiment party
In formula be sealing-tape machine 10), the collecting-tank 13 below 10 output terminal of the second conveying device；Hot DRI elephant trunks 3 enter cylinder cavity
The high-pressure water heating nozzle 12-2 that interior inlet is equipped with connection sedimentation basin 12 send to spray high-pressure water heating to self-heating DRI elephant trunks 3
The high-temperature direct reduced iron material gone out；High-pressure water heating nozzle 12-2 is also extended into the cylinder cavity.It is described transverse direction tubular from
The lower part of heart dehydrator 4 is located in the hot water in hot-tub 11；Lateral 4 circumference of tubular centrifuge dehumidifier is provided inwardly with grid filter
Net；5 lower output side bottom of hopper also is provided with grid filter plate.5 output terminal of hopper extends a cavity.The hot-tub 11
And the top of lateral tubular centrifuge dehumidifier 4 is covered with vapour hood 15.15 top of vapour hood is equipped with steam smoke exhaust barrel 14.It steams
Vapour smoke exhaust barrel 14 is connected with vapour hood 15.The water-cooling-sprayer 16 on vapour hood top is additionally provided in the vapour hood 15.This is cold
But sprinkler head 16 connects outside network.
The reversible tape machine 7 positioned at 10 lower section of the second conveying device is additionally provided with, is equipped with below the both ends of reversible tape machine 7
8 entrance of storage bin.High-pressure water heating nozzle 12-2 is connect with sedimentation basin 12 by heat-exchanger pump 12-1；12 top of sedimentation basin is equipped with water intaking
Nozzle, pipe end are equipped with filter screen, intake pipe and heat-exchanger pump 12-1 inlet communications；The collecting-tank 13 equally with heat-exchanger pump 12-1
Inlet communication.
Further, it is right by above-mentioned water-cooling-sprayer 16 in order to fully recycle the water resource in whole device
Steam in vapour hood 15, which carries out being cooled to recycle-water, to be fallen into hot-tub 11.And the is equipped with below the first conveying device 6
One return water canal 17, the backwater end of the first return water canal 17, which is located on sedimentation basin 12, can return to recycle-water to sedimentation basin 12
In；Second conveying device, 10 lower section is equipped with the second return water canal 17-1, is also located at collecting at the backwater end of the second return water canal 17-1
Recycle-water can be recovered into the collecting-tank 13 on pond 13.Pushing off the slag filtering is additionally provided at first, second return water canal backwater end
Plate 17-2 is to have prevented waste residue from passing back into hot-tub 11 and collecting-tank 13.
And on the basis of above-mentioned direct reduced iron by rotary hearth furnace hot water quenching device, invention additionally discloses the users of the device
Method, the technical solution of the application method are：
The high-temperature direct reduced iron that rotary hearth furnace 1 produces is discharged, then be discharged into through hot DRI elephant trunks 3 through rotary hearth furnace discharge mechanism 2
In the cylinder cavity of lateral tubular centrifuge dehumidifier 4, the high-pressure water heating nozzle 12-2 sprays high-pressure water heating by high-temperature direct reduction
Iron chilling, high-temperature direct reduced iron are further cooled to cooling in lateral 4 lower end of tubular centrifuge dehumidifier in submerging hot water
Material；Lateral tubular centrifuge dehumidifier 4 circles the table water for sloughing cooling material, and cooling material is de- from lateral tubular centrifugation
It is dropped in hopper 5, and feeding slot 5 is unloaded to the first conveying device 6 at the top of hydrophone, and transports and be discharged into storage bin 8；Cooling
Material is unloaded from the discharge valve 9 of storage bin 8 to being transported will cool down material in the second conveying device 10.Punching water is in sedimentation basin
It is naturally heavy net in 12.
Further, the high pressure water hydraulic pressure that high-pressure water heating nozzle sprays is 0.1~0.2MPa, and water quality is turbid circulating water, water temperature
It is 60~80 DEG C；Dehydrator circular motion speed is 1~5r/min.Rotary hearth furnace discharge mechanism roll surface is disposed with spiral knife face, rotation
Rotary speed is 3.1~31r/min.
And the above-mentioned explanation for fully recycling the water resource in whole device is combined, high-temperature direct reduction pelletizing water quenching
But the steam generated during is discharged into steam smoke exhaust barrel 14, and 14 top of steam smoke exhaust barrel is provided with water-cooling-sprayer 16, is used
In steam cooling, liquid water is re-formed, is back in hot-tub；And pass through the first return water canal 17, the second return water canal 17-1
Excessive effluent collection in first conveying device 6 and the second conveying device 10 is reused.Hot-tub ullage is provided with solid
Determine moisturizing nozzle, connect external fluid delivery conduit net, water quality is muddy water, and part water caused by supplement steam discharging damages.
There are many concrete methods of realizing and approach of the present invention, and the above is only the preferred embodiment of the present invention.It should
It points out, for those skilled in the art, without departing from the principle of the present invention, if can also make
Dry improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention.Each composition being not known in the present embodiment
The available prior art in part is realized.
Claims (10)
1. a kind of direct reduced iron by rotary hearth furnace hot water quenching device, it is characterized in that, it is connected including rotary hearth furnace, hot-tub, with hot-tub
Sedimentation basin, the lateral tubular centrifuge dehumidifier on hot-tub, from rotary hearth furnace extend into lateral tubular centrifuge dehumidifier
Cylinder cavity in hot DRI elephant trunks, be similarly positioned in a cavity hopper, the first conveying device below hopper output terminal,
Storage bin below the first conveying device output terminal, the second conveying device below bin stock bin discharge port external, positioned at
Collecting-tank below two conveying device output terminals；Hot DRI elephant trunks enter the height that the inlet in a cavity is equipped with connection sedimentation basin
Press hot water nozzle；The high-pressure water heating nozzle is also extended into the cylinder cavity.
2. direct reduced iron by rotary hearth furnace hot water quenching device as described in claim 1, it is characterized in that, the transverse direction tubular centrifugation is de-
The lower part of hydrophone is located in the hot water in hot-tub；Lateral tubular centrifuge dehumidifier circumference is provided inwardly with grid strainer；It is described
Hopper output terminal extends a cavity.
3. direct reduced iron by rotary hearth furnace hot water quenching device as claimed in claim 2, it is characterized in that, the hot-tub and lateral cylinder
Vapour hood is covered with above shape centrifuge dehumidifier；Steam smoke exhaust barrel, steam smoke exhaust barrel and vapour hood are equipped with above the vapour hood
Connection；The water-cooling-sprayer on vapour hood top is additionally provided in the vapour hood.
4. direct reduced iron by rotary hearth furnace hot water quenching device as claimed in claim 3, it is characterized in that, under first conveying device
Side is equipped with the first return water canal, and the backwater end of the first return water canal is located on hot-tub；Second is equipped with below second conveying device
Return water canal is additionally provided with the collecting-tank of recirculation water in the second return water canal of recycling at the backwater end of the second return water canal.
5. direct reduced iron by rotary hearth furnace hot water quenching device as claimed in claim 4, it is characterized in that, it is additionally provided with positioned at the second conveying
Reversible tape machine below device, the both ends lower section of reversible tape machine are equipped with storage bin entrance.
6. direct reduced iron by rotary hearth furnace hot water quenching device as claimed in claim 5, it is characterized in that, high-pressure water heating nozzle and precipitation
Pond is connected by heat-exchanger pump；Water intaking nozzle is equipped with above sedimentation basin, pipe end is equipped with filter screen, and intake pipe connects with hot water pump inlet
It is logical；The collecting-tank equally with heat-exchanger pump inlet communication.
7. direct reduced iron by rotary hearth furnace hot water quenching device as described in claim 1, it is characterized in that, hopper lower output side bottom
Equipped with grid filter plate.
8. a kind of application method using any one of claim 1 to 7 direct reduced iron by rotary hearth furnace hot water quenching device,
It is characterized in, the high-temperature direct reduced iron of rotary hearth furnace production is through hot DRI elephant trunks, in the cylinder cavity of lateral tubular centrifuge dehumidifier, institute
It states high-pressure water heating nozzle and sprays high-pressure water heating by high-temperature direct reduced iron chilling, horizontal stroke of the high-temperature direct reduced iron in hot water is submerged
Cooling material is further cooled into tubular centrifuge dehumidifier lower end；Lateral tubular centrifuge dehumidifier circle slough it is cold
But the table water of material, cooling material are dropped to from the top of lateral tubular centrifuge dehumidifier in hopper, and feeding slot is unloaded to first defeated
It send on device, and transports and be discharged into storage bin；Cooling material from storage bin unload in the second conveying device to by cooling thing
Material transports.
9. application method as claimed in claim 8, it is characterized in that, the high pressure water hydraulic pressure that high-pressure water heating nozzle sprays for 0.1~
0.2MPa, water quality are turbid circulating water, and water temperature is 60~80 DEG C；Dehydrator circular motion speed is 1~5r/min.
10. application method as claimed in claim 9, it is characterized in that, it is generated during the water quenching cooling of high-temperature direct reduction pelletizing
Steam be discharged into steam smoke exhaust barrel, steam smoke exhaust barrel top is provided with water-cooling-sprayer, for steam cooling, re-forms
Liquid water is back in hot-tub；And the first conveying device and the second conveying are filled by the first return water canal, the second return water canal
The excessive effluent collection recycling put.
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| CN201610431526.4A CN105907911B (en) | 2016-06-15 | 2016-06-15 | A kind of direct reduced iron by rotary hearth furnace hot water quenching device and method |
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| CN201610431526.4A CN105907911B (en) | 2016-06-15 | 2016-06-15 | A kind of direct reduced iron by rotary hearth furnace hot water quenching device and method |
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| CN105907911B true CN105907911B (en) | 2018-07-03 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435075A (en) * | 2011-12-29 | 2012-05-02 | 李世杰 | Cooling device for direct reduction iron |
| CN102586532A (en) * | 2012-03-08 | 2012-07-18 | 江苏沙钢集团有限公司 | Direct reduction iron cooling device |
| CN202415586U (en) * | 2011-12-29 | 2012-09-05 | 李世杰 | Cooling device for direct reduction iron |
| CN205741090U (en) * | 2016-06-15 | 2016-11-30 | 江苏省冶金设计院有限公司 | A kind of direct reduced iron by rotary hearth furnace hot water quenching device |
-
2016
- 2016-06-15 CN CN201610431526.4A patent/CN105907911B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102435075A (en) * | 2011-12-29 | 2012-05-02 | 李世杰 | Cooling device for direct reduction iron |
| CN202415586U (en) * | 2011-12-29 | 2012-09-05 | 李世杰 | Cooling device for direct reduction iron |
| CN102586532A (en) * | 2012-03-08 | 2012-07-18 | 江苏沙钢集团有限公司 | Direct reduction iron cooling device |
| CN205741090U (en) * | 2016-06-15 | 2016-11-30 | 江苏省冶金设计院有限公司 | A kind of direct reduced iron by rotary hearth furnace hot water quenching device |
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