CN102329901A - Liquid-state steel slag micronization recycling device - Google Patents
Liquid-state steel slag micronization recycling device Download PDFInfo
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- CN102329901A CN102329901A CN201110311679A CN201110311679A CN102329901A CN 102329901 A CN102329901 A CN 102329901A CN 201110311679 A CN201110311679 A CN 201110311679A CN 201110311679 A CN201110311679 A CN 201110311679A CN 102329901 A CN102329901 A CN 102329901A
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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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
The invention relates to a liquid-state steel slag micronization recycling device. The device is characterized by comprising a pulverization heat exchange chamber 6, a runner 2, an annular tapered nozzle 3, a nozzle casing 4, a blower 8, a heat exchanger 10, a dust collector 11, a draught fan 13 and a chimney 14, wherein the annular tapered nozzle 3 is arranged on the top of the pulverization heat exchange chamber 6; the runner 2 is arranged on the annular tapered nozzle 3; the nozzle casing 4 is arranged at the outlet of the annular tapered nozzle 3; an air outlet 5 is formed on the top of the pulverization heat exchange chamber 6; a cool air inlet 7 and a bottom slag discharge port are formed at the bottom of the pulverization heat exchange chamber 6; the draught fan 8 is connected with the cool air inlet 7; the heat exchanger 10 is communicated with the air outlet 5 and the dust collector; and the draught fan 13 is communicated with the dust collector 11 and the chimney 14. Residual heat of high-temperature flue gas containing mass steel slag micropowder is recycled by adopting combination of the heat exchanger and the dust collector, and the value of the residual heat can bring considerable economic repayment.
Description
Technical field
The present invention relates to the retrieving arrangement of waste in the smelting process of iron or steel, relate in particular to a kind of liquid steel slag micronization retrieving arrangement.
Background technology
The present steel slag utilization rate of China is also lower, and the coming years, the slag processing of China was main to improve the steel slag utilization rate, and emphasis is resolved the problem of outlet of waste steel slag.Slag will be accomplished " zero release ", and it sells outlet must have wide, long-term, a stable market to admit, and this has only cement industry eligible.Produce the slag product that meets the cement industry standard, must at first solve slag stable components problem, to guarantee application safety; Once more also should be with the slag product grain refine of trying one's best, to reduce the grinding process energy expenditure and to improve iron recovery.
Accomplish above target, also just solved the part of problem: can the material composition resource of slag be reclaimed.Should also be noted that oven-fresh liquid steel slag temperature reaches about 1600 ℃, containing a large amount of sensible heat resources, it is worth with iron and reclaims, waste residue utilization can be mentioned in the same breath.The perfect steel slag utilization scheme of one cover should reclaim steel scrap earlier, secondly reclaims sensible heat and waste residue as far as possible, will improve its grade as far as possible to waste residue.
Present technology has had been noted that comprehensive recovery problem of steel slag resource.For example, hot vexed slag method can reclaim waste residue and iron and steel scrap preferably; Wind is quenched shotting can be with the liquid slag prilling, and has technology to take up to reclaim sensible heat wherein.But above technology has just been excavated the surperficial aspect of steel slag resource, is not deep into the deep layer contact between each resource, also has many principal contradictions.
With nearer Institutes Of Technology Of Hebei's patent 200910075336.3 " a kind of liquid steel slag treatment process and device " is example; This patent reclaims the slag sensible heat with the gas pelletizing technology of quenching; Obtain the high-temperature solid slag particle of particle diameter, get into airtight cooling tank heat exchange then, discharge the low temperature slag particle less than 3mm.This patent can be represented the key step of wind granulation method recovery waste heat, iron and steel scrap, waste residue in fact: the solid impurity particle that 1) is granulated into (on average about 1-2mm) below the 3mm earlier; 2) and then to the solid impurity particle of heat carry out heat exchange; 3) colder solid impurity particle is handled to reclaim iron and steel scrap and waste residue at last.The main drawback that this technology exists is: 1) the technical process route is long, and link is too many; 2) be granulated into the solid impurity particle of 1-2mm median size; In its diameter of the broken moment formation of wind, the time, liquid slag will experience many processes such as fragmentation, balling-up, cooled and solidified in the so short time about 1s; In fact the solid impurity particle of part greater particle size has little time to be frozen into fully solid-state; Therefore remaining semi liquid state slag brings a series of problems, mainly be dry slag at equipment wall surface, influence heat exchange efficiency and equipment life; 3) solid impurity particle of median size 1-2mm is wanted relatively difficulty of recycle, if make cement additire, also needs further grinding and stabilization treatment, power consumption and occupation of land.
Analyse in depth the major cause that above contradiction forms, because excessive the causing of liquid slag granulation diameter.If liquid steel slag diameter wind is broken into the micro mist of micron level, then because the slag particle diameter is enough little, a series of contradiction above can solving smoothly.About with the direct micronization of liquid steel slag; Still there is not the report of meeting at present; But in field of powder metallurgy, the technology that the metal mist of liquid state is changed into micro mist is comparative maturity, and nearest patent has 200610047579.2 " production technology of two-nozzle atomization aluminium powder "; " 201010291650.8 hierarchy system and metal atomization device thereof are pulverized in the atomizing of metal ultra micro ", 201010216471.8 " liquid metal spraying double-level atomizing nozzle devices " etc.Because liquid steel slag and some liquid metal have certain similarity, be possible therefore with the liquid steel slag micronization.But, liquid metal atomizing at present or micronization, its industrial scale is too little, ton compares with the industrial scale PM number of liquid steel slag, is difficult to adapt to the rhythm of production of liquid steel slag.Therefore, the technology of indiscriminately imitating powder metallurgy fully is infeasible, must find the middle of the road of a suitable liquid steel slag.
From on can find out that in the prior art, be applicable to a little less than the micronization equipment processing power of metal, no residual neat recovering system, incompatibility waste residue reclaim the field.And existing waste residue recovery system, the waste residue utilization rate is low, the sensible heat resource recovery is low, floor space is wide, efficient is low.
Summary of the invention
For addressing the above problem, the present invention proposes the liquid slag micro powder retrieving arrangement that a kind of sensible heat reclaims, the waste residue utilization rate is high.
For achieving the above object; The technical scheme that the present invention adopts is: liquid steel slag micronization retrieving arrangement is characterized in that: comprise efflorescence Heat Room 6, chute 2, annular convergent nozzle 3, nozzle casing 4, described annular convergent nozzle 3 is located at efflorescence Heat Room 6 tops; Said chute 2 is located on the annular convergent nozzle 3; Described nozzle casing 4 is located at annular convergent nozzle 3 outlets, and described efflorescence Heat Room 6 tops are provided with air outlet 5, and efflorescence Heat Room 6 bottoms are provided with cold wind import 7, end slag outlet;
Also comprise gas blower 8, interchanger 10, fly-ash separator 11, induced draft fan 13, chimney 14, described gas blower 8 is connected with cold wind import 7, and described interchanger 10 is communicated with air outlet 5, fly-ash separator; Described induced draft fan 13 is communicated with fly-ash separator 11, chimney 14.
First preferred version of the present invention is that described fly-ash separator 11 is a sack cleaner.
Second preferred version of the present invention is that described fly-ash separator 11 is divided into cinder conveyer 12, described cinder conveyer 12 connections first magnetic separator 15.
The 3rd preferred version of the present invention is that the slag outlet place establishes second magnetic separator at the described end.
The 4th preferred version of the present invention is that the exit gas speed of described annular convergent nozzle is that 300m/s-330m/s, pressure are more than the 0.3Mpa.
The 5th preferred version of the present invention does, described efflorescence Heat Room is a vertical structure, and inside is wall-cooling surface or vaporization heating surface.
The 7th preferred version of the present invention is that described annular convergent nozzle is annular wedge-like.
Invention thought of the present invention is: the high-temperature liquid state slag at first passes through annular convergent nozzle, adopts mesohigh (more than the 0.6Mpa), big flow (100Nm
3More than/t the slag) pressurized gas or water vapor make source of the gas, sharply broken and cooling becomes the micro mist of micron level with liquid steel slag, below the mean diameter 300 μ m; Liquid slag becomes the micro mist segment distance that must fly; This process is accomplished in the efflorescence Heat Room; The efflorescence Heat Room adopts common wall-cooling surface or vaporization heating surface, accomplishes fragmentation in the flight course in the efflorescence Heat Room, becomes too many levels such as powder, fine particle cooling, gas delivery.Micro powder granule is sharply caused flue-gas temperature to raise after the cooling, and carries a large amount of particle dusts in the flue gas.To this high temperature dust flue gas, adopt interchanger to reclaim its waste heat again, reduce temperature after the fly-ash separator dedusting, the gained dust also is the waste residue micro mist of micron level, can directly make cement additire.Owing to contain the iron particle after some refinement in the dust, therefore adopt magnetic separator to separate, reclaim the iron and steel scrap resource.The present invention mainly is applicable to the processing of high-temperature liquid state slag, especially like the converter of steel industry, electric furnace, blast furnace slag etc.
About the broken key equipment of liquid steel slag; The exit gas speed of annular convergent nozzle is local velocity of sound 300m/s-330m/s; Exit gas pressure is more than 0.3Mpa, and the orifice gas passage is annular wedge-like, adopts steam or the pressurized gas of 0.6Mpa-3.0Mpa to make source of the gas.The feed rate of gas source and flow amount at least should be at 100Nm when pressure is 0.6Mpa
3More than/t the slag.Nozzle placement is in efflorescence Heat Room center of top.The consideration of adopting convergent nozzle is to let jet exit gas have high-speed and high pressure simultaneously, guarantees the enough surging forces of slag liquid.The consideration of adopting annular opening is to guarantee that the winding-up air-flow has better comprehensive homogeneity.
About the efflorescence Heat Room, adopt the wall-cooling surface or the vaporization heating surface of vertical structure, cold wind is advanced in the bottom, and the top goes out the dust-laden hot blast, and center of top is the efflorescence device, establishes end slag outlet bottom.
Technical superiority of the present invention is: inner function module is perfect, and efflorescence, heat exchange, magnetic separation are high to the utilization ratio of waste steel slag.The waste residue dust quality of producing is good, is more suitable for cement and makes.Advantage is following in detail.
1. liquid slag direct production micron order waste steel slag micro mist.
2. the generation of micro mist is mainly accomplished by a kind of annular convergent nozzle, mesohigh and big flow;
Slag micro powder is taken as dust in process of production, collects with cleaning apparatus.
3. the waste heat that contains the high-temperature flue gas of a large amount of slag micro powders adopts interchanger+fly-ash separator combination to reclaim.The value of waste heat can be brought considerable economy return.
4. the iron and steel scrap particle produced of micronization process is thinner, and efficient was higher when magnetic separation was reclaimed, and changes in the slag in the past the defect that is difficult to grinding because of iron content.
5. liquid slag micronization; Make the solid impurity particle diameter reach micron order; Therefore have cooled and solidified speed and good flight path faster, make the dry slag phenomenon of traditional granulation bulkhead face be able to avoid, adopt common wall-cooling surface or vaporization heating surface can have the permanent life-span.
6. because the high-temperature liquid state slag is prone to the difficult cooling of bonding, adopt traditional wind granulation, be difficult to solve all difficulties in the waste heat recovery process.The present invention since the micro mist diameter than the little one magnitude of traditional granulation particle, its cooled and solidified speed improves greatly, liquid slag moment becomes solid-state micro mist, can solve the dry slag problem in heat exchange storehouse; The flying distance of micro mist can shorten simultaneously, so the volume in heat exchange storehouse can dwindle.Compare with traditional hot vexed technology, the activity and the stability of micro mist are better, no longer need take up an area of huge hot vexed pond.
7. liquid slag direct production waste steel slag micro mist only need drop into a small amount of extra broken gas cost, just can save the energy consumption that traditional grain slag is broken into micro mist again.
8. liquid slag direct production slag micro powder, chilling is more abundant, and ground-slag activity and good stability turn over several times as the value ratio conventional use of cement additire.
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Description of drawings
Fig. 1 is the present embodiment process flow sheet.
Fig. 2 is a present embodiment disintegrating slag structure iron.
Accompanying drawing mark: 1, cinder ladle 2, chute 3, annular convergent nozzle 4, nozzle casing 5, air outlet 6, efflorescence Heat Room 7, cold wind import 8, gas blower 9, bottom slag 10, interchanger 11, sack cleaner 12, cinder conveyer 13, induced draft fan 14, chimney 15, first magnetic separator 16, iron and steel scrap 17, waste residue micro mist.
Embodiment
With reference to figure 1; Liquid steel slag micronization retrieving arrangement comprises efflorescence Heat Room 6, chute 2, annular convergent nozzle 3, nozzle casing 4, and described annular convergent nozzle 3 is located at efflorescence Heat Room 6 tops; Said chute 2 is located on the annular convergent nozzle 3; Described nozzle casing 4 is located at annular convergent nozzle 3 outlets, and described efflorescence Heat Room 6 tops are provided with air outlet 5, and efflorescence Heat Room 6 bottoms are provided with cold wind import 7, end slag outlet;
Also comprise gas blower 8, interchanger 10, fly-ash separator 11, induced draft fan 13, chimney 14, described gas blower 8 is connected with cold wind import 7, and described interchanger 10 is communicated with air outlet 5, fly-ash separator; Described induced draft fan 13 is communicated with fly-ash separator 11, chimney 14.Described fly-ash separator 11 is a sack cleaner.Described fly-ash separator 11 is divided into cinder conveyer 12, and described cinder conveyer 12 is communicated with first magnetic separator 15.
The high-temperature liquid state slag that converter or electric furnace etc. come out gets into cinder ladle 1, and flows out from chute 2.And the mesohigh gas (more than the pressure 0.6Mpa, pressurized air, nitrogen or water vapor etc. that flow 100Nm3/t slag is above) that is used for broken liquid slag is broken into fine particle from annular convergent nozzle 3 ejections with liquid steel slag.Adopt suitable processing parameter (blowing gas flow and pressure, liquid slag flow etc.), can make the slag micro powder diameter reach micron level, below the mean diameter 300 μ m.Blast freezing air from gas blower 8, after cold wind import 7, freezing air carries out thermal exchange with slag in efflorescence Heat Room 6.Efflorescence Heat Room 6 is a vertical structure, and wall adopts water-cooled assembly or vaporization heating surface.
Liquid slag becomes the micro mist segment distance that must fly, and this process is all accomplished in efflorescence Heat Room 6, accomplishes too many levels such as broken, one-tenth powder, fine particle cooling, gas delivery in the flight course efflorescence Heat Room 6 in.The minute quantity macrobead is deposited to the bottom, becomes bottom slag 9.The slag micro powder particle is sharply caused flue-gas temperature to raise after the cooling, and carries a large amount of particle dusts in the flue gas, discharges from efflorescence Heat Room air outlet 5, for preventing to export the air-dry nozzle efflorescence process of disturbing, adopts nozzle casing 4 to protect.For the high temperature dust hot blast of discharging, adopt interchanger 10 to reclaim its waste heat, by fly-ash separator 11 dedustings, drain into atmosphere after the reduction temperature through induced draft fan 13 and chimney 14.The dust that fly-ash separator is collected also be the waste steel slag micro mist of micron level behind cinder conveyer 12, separate by first magnetic separator 15, reclaim iron and steel scrap 16 and waste residue micro mist 17.Waste residue micro mist 17 can be made the higher-grade cement additire and use.Second magnetic separator is located under the waste residue outlet, and the bottom slag is carried out magnetic separation.
Claims (7)
1. liquid steel slag micronization retrieving arrangement; It is characterized in that: comprise efflorescence Heat Room (6), chute (2), annular convergent nozzle (3), nozzle casing (4); Described annular convergent nozzle (3) is located at efflorescence Heat Room (6) top; Said chute (2) is located on the annular convergent nozzle (3); Described nozzle casing (4) is located at annular convergent nozzle (3) outlet, and described efflorescence Heat Room (6) top is provided with air outlet (5), and efflorescence Heat Room (6) bottom is provided with cold wind import (7), end slag outlet;
Also comprise gas blower (8), interchanger (10), fly-ash separator (11), induced draft fan (13), chimney (14); Described gas blower (8) is connected with cold wind import (7), and described interchanger (10) is communicated with air outlet (5), fly-ash separator (11); Described induced draft fan (13) is communicated with fly-ash separator (11), chimney (14).
2. liquid slag micro powder retrieving arrangement according to claim 1 is characterized in that: described fly-ash separator (11) is a sack cleaner.
3. liquid slag micro powder retrieving arrangement according to claim 1 and 2 is characterized in that: described fly-ash separator (11) is divided into cinder conveyer (12), and described cinder conveyer (12) is communicated with first magnetic separator (15).
4. liquid slag efflorescence retrieving arrangement according to claim 1 is characterized in that: the slag outlet place establishes second magnetic separator at the described end.
5. liquid slag efflorescence retrieving arrangement according to claim 1, it is characterized in that: the exit gas speed of described annular convergent nozzle is local velocity of sound 300m/s-330m/s, and exit gas pressure is more than 0.3Mpa; Adopt steam or the pressurized gas of 0.6Mpa-3.0Mpa to make source of the gas, the feed rate of gas source and flow amount at least should be more than the 100Nm3/t slag when pressure is 0.6Mpa.
6. liquid slag efflorescence retrieving arrangement according to claim 1, it is characterized in that: described efflorescence Heat Room is a vertical structure, inside is wall-cooling surface or vaporization heating surface.
7. according to claim 1 or 5 described liquid slag efflorescence retrieving arrangements, it is characterized in that: described annular convergent nozzle is annular wedge-like.
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| CN201110311679A CN102329901A (en) | 2011-10-14 | 2011-10-14 | Liquid-state steel slag micronization recycling device |
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Cited By (4)
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| CN103361449A (en) * | 2012-03-30 | 2013-10-23 | 鞍钢股份有限公司 | Efficient recycling method and device for complementary energy of blast furnace slag |
| CN103913071A (en) * | 2013-01-08 | 2014-07-09 | 魏新委 | Metallurgical slag flue gas treatment process |
| CN107365914A (en) * | 2017-07-11 | 2017-11-21 | 重庆大学 | The method that magnetic separation carries iron in the copper ashes particle prepared from dry method centrifugal granulation method |
| CN109811094A (en) * | 2019-03-05 | 2019-05-28 | 许晖 | A kind of device and method using blowing process pretreatment steel slag |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103361449A (en) * | 2012-03-30 | 2013-10-23 | 鞍钢股份有限公司 | Efficient recycling method and device for complementary energy of blast furnace slag |
| CN103361449B (en) * | 2012-03-30 | 2015-07-08 | 鞍钢股份有限公司 | Efficient recycling method and device for complementary energy of blast furnace slag |
| CN103913071A (en) * | 2013-01-08 | 2014-07-09 | 魏新委 | Metallurgical slag flue gas treatment process |
| CN107365914A (en) * | 2017-07-11 | 2017-11-21 | 重庆大学 | The method that magnetic separation carries iron in the copper ashes particle prepared from dry method centrifugal granulation method |
| CN109811094A (en) * | 2019-03-05 | 2019-05-28 | 许晖 | A kind of device and method using blowing process pretreatment steel slag |
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Application publication date: 20120125 |