CN103977956B - A kind of separate the apparatus and method of the harmful element such as alkali zinc in blast furnace dry method dust ash - Google Patents
A kind of separate the apparatus and method of the harmful element such as alkali zinc in blast furnace dry method dust ash Download PDFInfo
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Abstract
The present invention relates to and a kind of separate the apparatus and method of the harmful element such as alkali zinc in blast furnace dry method dust ash.This device includes: dedusting ash silo, conveyance conduit, dust separator, fine dust conveying pipe and cloth bag collecting bin；The top of dedusting ash silo connects with the bottom of dust separator；The upper end of dust separator is connected with cloth bag collecting bin by fine dust conveying pipe；Conveyance conduit connects with dust separator.The method includes: use cone pump dedusting ash to be sprayed in dust separator by conveyance conduit；Big dust particle is fallen in dedusting ash silo under gravity；Little granule dust is incorporated in cloth bag collecting bin with air-flow.This device and method effectively alleviates the enrichment phenomenon of the alkali in blast furnace dry method dust ash recycling process, zinc element, it is achieved the capable of circulation and green idea of blast furnace iron-making process.
Description
Technical field
The present invention relates to the solid waste method for processing resource technical fields such as blast furnace dedusting ash, separate the apparatus and method of the harmful element such as alkali zinc in blast furnace dry method dust ash particularly to a kind of.
Background technology
In blast furnace feeding crude fuel the harmful element such as alkali, zinc in blast-furnace shaft, the high-temperature region on top is reduced, after once more oxidized when rising to the relatively low region of temperature with Gas Flow, the furnace charge being attached to decline is again introduced into high-temperature region, go round and begin again, define the harmful element such as alkali, zinc enrichment phenomenon in blast furnace, normal production of blast furnace is exerted a certain influence；The harmful elements such as a portion alkali, zinc are attached on the particle dust in rising coal gas and are carried over outside stove, enter in sack cleaner, cloth bag reclaim after gravity, cyclone dust collector.Generally containing the ferrum element of about 35～40% in this part dedusting ash, also it is enriched the harmful element such as zinc oxide and the potassium of high level, sodium, lead, arsenic of about 3～10%, far above gravitational dust collection ash and cyclone dust removal ash simultaneously.These dedusting ash are directly used in and sinter the harmful element enrichment phenomenon such as the alkali causing blast furnace appearance serious, zinc, particularly higher zinc enrichment, directly affect smooth operation of furnace and longevity；At present, the blast furnace dry method dust ash of major part iron and steel enterprise cannot utilize owing to containing higher zinc oxide, it has to takes out or abandons, buried, environment is caused substantial pollution.
The method of existing blast furnace dry method dust ash dezincification mainly has high temperature method, chemical method, Physical, hydraulic cyclone method etc..High temperature method is for the purpose of the final zinc element of elimination completely, although the production lines such as domestic built tens rotary hearth furnaces, but owing to project investment is big, operating cost is high, is not suitable for the present situation that in blast furnace dry method dust ash, Zn content is relatively low.
Chemical method is eliminated containing acid sewage disposal and equipment corrosion problem owing to existing.
Physical is mainly magnetic separation process, point dry and wet two kinds.Mainly there is paramagnetism difference according to height in blast furnace dedusting ash containing zinc part and the low part containing zinc and sort in dry method, plays and reduce the effect of Zn content in dedusting ash.Wet method is generally adopted acid, alkali or ammonia saline solution and carrys out the materials such as extract and separate zinc, lead, obtains the products such as high-quality zinc, lead.Owing to wet-leaching rate is totally relatively low, can only reclaiming the zinc in the blast furnace dedusting ash of less than 40%, productivity ratio is not high；It addition, dry and wet severe operational environment, environment causes secondary dirty, is not suitable for industrial applications.
Hydraulic cyclone method needs to be configured to dedusting ash and water certain density serosity, adopts hydrocyclone to isolate overhead stream low containing zinc part containing zinc upper section and underflow, forms mud cake then through pressure filter dehydration, carries out terminal dezincification after drying.Hydraulic cyclone method is applicable to the process of blast furnace wet dedusting ash, but the equipment of process is complicated, procedure parameter mud cake inconvenience subsequent handling wayward, moisture uses.
Summary of the invention
For solving the problems referred to above, the invention provides and a kind of can effectively the big dust particle in dedusting ash be separated with little granule dust, by collecting and reclaim big dust particle after separation and little granule dust, zinc oxide and a certain amount of harmful element that can make in dedusting ash 80% are recycled, remaining dust can be controlled in less than 2.0% containing zinc oxide, can be used for the apparatus and method separating the harmful elements such as alkali zinc in blast furnace dry method dust ash of sintering process innoxious use.
Provided by the invention a kind of separate the device of the harmful element such as alkali zinc in blast furnace dry method dust ash and include:
Dedusting ash silo, conveyance conduit, dust separator, fine dust conveying pipe and cloth bag collecting bin；
The top of described dedusting ash silo connects with the bottom of described dust separator；
The upper end of described dust separator is connected with described cloth bag collecting bin by described fine dust conveying pipe；
Described conveyance conduit connects with described dust separator.
As preferably, described dust separator includes:
Housing, annular duct, nozzle, bracing frame and deflection cone；
Described annular duct is connected on the excircle above described housing；Described annular duct is connected with described enclosure interior by described nozzle；
Support frame as described above is arranged on described housing bottom；Described deflection cone is connected on support frame as described above；
Described conveyance conduit connects with described annular duct；
Described housing bottom connects with the top of described dedusting ash silo.
As preferably, described nozzle is uniformly distributed along described annular duct, and quantity is 10～30 groups；
Described nozzle center is descending gradually along described annular duct.
As preferably, the small end of described deflection cone is upwards；The conical surface of described deflection cone is vertical, be uniformly distributed multiple rows of hole that diameter is 5～20mm；Described hole is distributed on deflection cone the position of height 1/5～4/5.
As preferably, described cloth bag collecting bin includes:
Warehouse, diffusion valve, exhaust stack, cloth bag and unloading valve；
Described warehouse includes: the cone of bottom, the cylinder on top；
Described cone bottom arranges outlet；Described unloading valve is arranged in described outlet；Described fine dust conveying pipe is connected in described cylindrical middle part；
Described exhaust stack connects with described cylinder top；The porch that described exhaust stack connects with described warehouse is connected described cloth bag；
Described diffusion valve is arranged on described exhaust stack；
Described diffusion valve is for regulating the flow that diffuses of the conveying gas after Bag filter, the dust granules size that control is collected, the content of the harmful element such as alkali, zinc in adjustment regenerant.
In separation blast furnace dry method dust ash provided by the invention, dedusting ash is separated into relatively low big dust particle such as the harmful element containing alkali, zinc etc. and the higher little granule dust of the harmful element containing alkali, zinc etc. by arranging dust separator by the device of the harmful element such as alkali zinc；By arranging dedusting ash silo, big dust particle is collected supply sintering recycling；By arranging cloth bag collecting bin, the little granule dust in dedusting ash is collected in cloth bag, therefore recycled dust removing ashes can be used as zinc raw material processed by major part zinc oxide.Meanwhile, this device can be supporting with existing dry-dedusting system.
Provided by the invention a kind of separate the method for the harmful element such as alkali zinc in blast furnace dry method dust ash, including:
Cone pump is used dedusting ash to be sprayed in described dust separator by described conveyance conduit；
Big dust particle in described dedusting ash falls the bottom of described dust separator under gravity, and then drops in described dedusting ash silo；
Little granule dust in described dedusting ash is incorporated in described fine dust conveying pipe with air-flow, subsequently in described cloth bag collecting bin；
Obtain the little dedusting ash of dust granules by described cloth bag collecting bin, namely achieve separating of big dust particle in dedusting ash and little granule dust.
As preferably, dedusting ash is sprayed in described dust separator by described conveyance conduit by described utilization cone pump, including:
Described dedusting ash is sprayed in described annular duct by described conveyance conduit；Described dedusting ash is entered in described housing by the described nozzle being arranged in annular duct.
As preferably, the big dust particle in described dedusting ash falls the bottom of described dust separator under gravity, and then drops in described dedusting ash silo, including:
Enter into the dust granules in the dedusting ash in described housing to be blowed on the conical surface of described deflection cone；
A portion dust of described dust granules can pass through the hole on the conical surface of described deflection cone and enter the centre of described deflection cone, is directly deposited to the bottom of described housing, and then falls in described dedusting ash silo；
Another part of described dust granules glides along the conical surface of described deflection cone, falls the bottom of described housing from the bottom of described deflection cone, and then falls in described dedusting ash silo.
As preferably, the little granule dust in described dedusting ash is incorporated in described fine dust conveying pipe with air-flow, subsequently in described cloth bag collecting bin, including:
The described dedusting ash containing little granule dust is transferred gas and the air-flow that rises from the hole the described deflection cone conical surface brings the upper space of described dust separator into；
The described dedusting ash containing little granule dust carries pipe to be incorporated in described cloth bag collecting bin by described fine dust.
As preferably, obtaining, by described cloth bag collecting bin, the dedusting ash that dust granules is little, including:
When the described dedusting ash containing little granule dust passes through the described cloth bag at described cloth bag collecting bin top, the little granule dust in described dedusting ash is collected by described cloth bag, and the little granule dust being collected described in simultaneously can be recycled；
Described dedusting ash is entered in air by described exhaust stack and diffusion valve by the gas after described Bag filter.
In separation blast furnace dry method dust ash provided by the invention, the method blast furnace dry method dust ash of the harmful element such as alkali zinc processes, overcome the problems such as the equipment existed in wet processing is complicated, operation easier is big, the process requirement of product postorder is high, there is provided a kind of for blast furnace dry method dust ash and invest the harmful element separation methods such as little, the alkali of process stabilizing, zinc, not only in recyclable dedusting ash, major part zinc oxide is used as zinc raw material processed, through practice detection, all the other dust can be controlled in less than 2.0% containing zinc oxide, can all reclaim for SINTERING PRODUCTION.
Accompanying drawing explanation
The device separating the harmful elements such as alkali zinc in blast furnace dry method dust ash that Fig. 1 provides for the embodiment of the present invention is always schemed.
The horizontal section schematic diagram of the dust separator that Fig. 2 provides for the embodiment of the present invention.
The structural representation of the dust separator that Fig. 3 provides for the embodiment of the present invention and dedusting ash silo and fine dust conveying pipe.
The structural representation of the cloth bag collecting bin that Fig. 4 provides for the embodiment of the present invention.
Detailed description of the invention
Referring to accompanying drawing 1, a kind of device separating the harmful elements such as alkali zinc in blast furnace dry method dust ash provided by the invention includes: dedusting ash silo 1, conveyance conduit 2, dust separator 3, fine dust conveying pipe 4 and cloth bag collecting bin 5；The top of dedusting ash silo 1 connects with the bottom of dust separator 3；The upper end of dust separator 3 is connected with cloth bag collecting bin 5 by fine dust conveying pipe 4；Conveyance conduit 2 connects with dust separator 3.
Referring to accompanying drawing 2 and 3, as preferably, dust separator 3 includes: housing, annular duct 31, nozzle 32, bracing frame 33 and deflection cone 34；Annular duct 31 is connected on the excircle above housing；Annular duct 31 is connected with enclosure interior by nozzle 32；Bracing frame 33 is arranged on housing bottom；Deflection cone 34 is connected on bracing frame 33；Conveyance conduit 2 connects with annular duct 31；Housing bottom connects with the top of dedusting ash silo 1.
Referring to accompanying drawing 2 and 3, as preferably, nozzle 32 annularly carries pipe 31 to be uniformly distributed, and quantity is 10～30 groups；Nozzle 32 is rounded, rectangle or rectangle, and nozzle 32 center annularly carries pipe 31 descending gradually.As a kind of preferred embodiment, nozzle 32 annularly carries the horizontal plane of pipe 31 to be uniformly distributed, nozzle 32 totally 20 groups；Nozzle 32 is rectangle 20x40mm；Nozzle 32 from first nozzle 32 along with annular duct road 31 on along highly identical, to lower edge and the annular duct road 31 times of last nozzle 32 along identical, its center annularly conveyance conduit 31 is descending gradually, becomes one oblique line to be distributed.Adopt the nozzle 32 of circumference, can make conveying dust fully expansion, atomization, classification in dust separator 3 when not changing conveying gas flow, pressure, reach efficiently separating of thickness powder particles.
As preferably, the small end of deflection cone 34 is upwards；The conical surface of deflection cone 34 is vertical, be uniformly distributed multiple rows of hole that diameter is 5～20mm；Hole distribution is the position of height 1/5～4/5 on deflection cone 34.As one preferred embodiment, the conical surface uniform branch diameter of deflection cone 34 is the hole of 12mm, is distributed in upper 1/5 to lower the 1/5 of cone, is uniformly distributed along conical surface interval 50mm mono-row, hole central horizontal interval 50mm.Because arranging deflection cone 34, the big dust particle in dedusting ash can be deposited to deflection cone 34 surface under gravity, slides into the bottom of dust separator 3 along the conical surface, and then drops into dedusting ash silo 1；Particle dust in dedusting ash is transferred the gas of dedusting ash and ascending air brings the top of dust separator 3 into, carries pipe 4 to enter cloth bag collecting bin 5 through fine dust, and then is reclaimed by cloth bag 54.Dust is disperseed by air-flow again that rise from hole, and brings particle dust into upper space.
Referring to accompanying drawing 4, as preferably, cloth bag collecting bin 5 includes: warehouse 51, diffusion valve 52, exhaust stack 53, cloth bag 54 and unloading valve 55；Warehouse 51 includes: the cone of bottom, the cylinder on top；Cone bottom arranges outlet；Unloading valve 55 is arranged in outlet；Fine dust conveying pipe 4 is connected in cylindrical middle part；Exhaust stack 53 connects with cylinder top；The porch that exhaust stack 53 connects with warehouse is connected cloth bag 54；Diffusion valve 52 is arranged on exhaust stack 53；Diffusion valve 52 is for regulating the flow that diffuses of the conveying gas after cloth bag 54 filters, the dust granules size that control is collected, the content of the harmful element such as alkali, zinc in adjustment regenerant.
In separation blast furnace dry method dust ash provided by the invention, dedusting ash is separated into relatively low big dust particle such as the harmful element containing alkali, zinc etc. and the higher little granule dust of the harmful element containing alkali, zinc etc. by arranging dust separator 3 by the device of the harmful element such as alkali zinc；By arranging dedusting ash silo 1, big dust particle is collected supply sintering recycling；By arranging cloth bag 54, the little granule dust in dedusting ash is collected in cloth bag collecting bin 5, therefore recycled dust removing ashes can be used as zinc raw material processed by major part zinc oxide.Meanwhile, this device can be supporting with existing dry-dedusting system.
A kind of method separating the harmful elements such as alkali zinc in blast furnace dry method dust ash provided by the invention, including: use cone pump dedusting ash to be sprayed in dust separator 3 by conveyance conduit 2；Big dust particle in dedusting ash falls the bottom of dust separator 3 under gravity, and then drops in dedusting ash silo 1；Little granule dust in dedusting ash is incorporated in fine dust conveying pipe 4 with air-flow, subsequently in cloth bag collecting bin 5；Obtain, by cloth bag collecting bin 5, the dedusting ash that dust granules is little, namely achieve separating of big dust particle in dedusting ash and little granule dust.
As preferably, using cone pump to spray in dust separator 3 by dedusting ash by conveyance conduit 2, including: dedusting ash is sprayed in annular duct 31 by conveyance conduit 2；Dedusting ash is entered in housing by the nozzle 32 being arranged in annular duct 31.
As preferably, the big dust particle in dedusting ash falls the bottom of dust separator 3 under gravity, and then drops in dedusting ash silo 1, including: enter into the dust granules in the dedusting ash in housing and be blowed on the conical surface of deflection cone 34；A portion dust of dust granules can pass through the hole on the conical surface of deflection cone 34 and enter the centre of deflection cone 34, is directly deposited to the bottom of housing, and then falls in dedusting ash silo 1；Another part of dust granules glides along the conical surface of deflection cone 34, falls the bottom of housing from the bottom of deflection cone 34, and then falls in dedusting ash silo 1.
As preferably, little granule dust in dedusting ash is incorporated in fine dust conveying pipe 4 with air-flow, subsequently in cloth bag collecting bin 5, it is transferred gas including: the dedusting ash containing little granule dust and the air-flow that rises from the hole deflection cone 34 conical surface brings the upper space of dust separator 3 into；Dedusting ash containing little granule dust is incorporated in cloth bag collecting bin 5 by fine dust conveying pipe 4.
As preferably, the dedusting ash that dust granules is little is obtained by cloth bag collecting bin 5, including: when the dedusting ash containing little granule dust passes through the cloth bag 54 at cloth bag collecting bin 5 top, the little granule dust in dedusting ash is collected by cloth bag 54, and the little granule dust being simultaneously collected can be recycled；Dedusting ash filtered by cloth bag 54 after gas entered in air by exhaust stack 53 and diffusion valve 52.
In separation blast furnace dry method dust ash provided by the invention, the method blast furnace dry method dust ash of the harmful element such as alkali zinc processes, overcome the problems such as the equipment existed in wet processing is complicated, operation easier is big, the process requirement of product postorder is high, there is provided a kind of for blast furnace dry method dust ash and invest the harmful element separation methods such as little, the alkali of process stabilizing, zinc, not only in recyclable dedusting ash, major part zinc oxide is used as zinc raw material processed, through practice detection, all the other dust can be controlled in less than 2.0% containing zinc oxide, can all reclaim for SINTERING PRODUCTION.
Above-described detailed description of the invention; the purpose of the present invention, technical scheme and beneficial effect have been further described; it is it should be understood that; the foregoing is only the specific embodiment of the present invention; it is not limited to the present invention; all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (8)
1. one kind separates the device of alkali zinc harmful element in blast furnace dry method dust ash, it is characterised in that including:
Dedusting ash silo, conveyance conduit, dust separator, fine dust conveying pipe and cloth bag collecting bin；
The top of described dedusting ash silo connects with the bottom of described dust separator；
The upper end of described dust separator is connected with described cloth bag collecting bin by described fine dust conveying pipe；
Described conveyance conduit connects with described dust separator；
Described cloth bag collecting bin includes: warehouse, diffusion valve, exhaust stack, cloth bag and unloading valve；
Described warehouse includes: the cone of bottom, the cylinder on top；
Described cone bottom arranges outlet；Described unloading valve is arranged in described outlet；Described fine dust conveying pipe is connected in described cylindrical middle part；
Described exhaust stack connects with described cylinder top；The porch that described exhaust stack connects with described warehouse is connected described cloth bag；
Described diffusion valve is arranged on described exhaust stack；
Described diffusion valve is for regulating the flow that diffuses of the conveying gas after Bag filter, the dust granules size that control is collected, the content of alkali, zinc harmful element in adjustment regenerant.
2. device according to claim 1, it is characterised in that described dust separator includes:
Housing, annular duct, nozzle, bracing frame and deflection cone；
Described annular duct is connected on the excircle above described housing；Described annular duct is connected with described enclosure interior by described nozzle；
Support frame as described above is arranged on described housing bottom；Described deflection cone is connected on support frame as described above；
Described conveyance conduit connects with described annular duct；
Described housing bottom connects with the top of described dedusting ash silo.
3. device according to claim 2, it is characterised in that:
Described nozzle is uniformly distributed along described annular duct, and quantity is 10～30 groups；
Described nozzle center is descending gradually along described annular duct.
4. device according to claim 2, it is characterised in that:
The small end of described deflection cone is upwards；The conical surface of described deflection cone is vertical, be uniformly distributed multiple rows of hole that diameter is 5～20mm；Described hole is distributed on deflection cone the position of height 1/5～4/5.
5. one kind separates the method for alkali zinc harmful element in blast furnace dry method dust ash, it is characterised in that described method realizes based on described device arbitrary in Claims 1 to 4, including:
Cone pump is used dedusting ash to be sprayed in described dust separator by described conveyance conduit；
Big dust particle in described dedusting ash falls the bottom of described dust separator under gravity, and then drops in described dedusting ash silo；
Little granule dust in described dedusting ash is incorporated in described fine dust conveying pipe with air-flow, subsequently in described cloth bag collecting bin；
Obtain the little dedusting ash of dust granules by described cloth bag collecting bin, namely achieve separating of big dust particle in dedusting ash and little granule dust；When dedusting ash containing little granule dust passes through the described cloth bag at described cloth bag collecting bin top, the little granule dust in described dedusting ash is collected by described cloth bag, and the little granule dust being simultaneously collected can be recycled；Described dedusting ash is entered in air by described exhaust stack and diffusion valve by the gas after described Bag filter.
6. method according to claim 5, it is characterised in that dedusting ash is sprayed in described dust separator by described conveyance conduit by described utilization cone pump, including:
Described dedusting ash is sprayed in described annular duct by described conveyance conduit；Described dedusting ash is entered in described housing by the described nozzle being arranged in annular duct.
7. method according to claim 5, it is characterised in that the big dust particle in described dedusting ash falls the bottom of described dust separator under gravity, and then drops in described dedusting ash silo, including:
Enter into the dust granules in the dedusting ash in described housing to be blowed on the conical surface of described deflection cone；
A portion dust of described dust granules can pass through the hole on the conical surface of described deflection cone and enter the centre of described deflection cone, is directly deposited to the bottom of described housing, and then falls in described dedusting ash silo；
Another part of described dust granules glides along the conical surface of described deflection cone, falls the bottom of described housing from the bottom of described deflection cone, and then falls in described dedusting ash silo.
8. method according to claim 5, it is characterised in that the little granule dust in described dedusting ash is incorporated in described fine dust conveying pipe with air-flow, subsequently in described cloth bag collecting bin, including:
The described dedusting ash containing little granule dust is transferred gas and the air-flow that rises from the hole the described deflection cone conical surface brings the upper space of described dust separator into；
The described dedusting ash containing little granule dust carries pipe to be incorporated in described cloth bag collecting bin by described fine dust.
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| CN201410178212.9A CN103977956B (en) | 2014-04-29 | 2014-04-29 | A kind of separate the apparatus and method of the harmful element such as alkali zinc in blast furnace dry method dust ash |
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| CN105886683A (en) * | 2016-04-27 | 2016-08-24 | 武汉钢铁股份有限公司 | Zinc discharge device used for blast furnace |
| CN107586963B (en) * | 2017-08-25 | 2018-12-04 | 鞍钢股份有限公司 | A kind of leaded dedusting ash integrated conduct method |
| CN107586962B (en) * | 2017-08-25 | 2019-03-26 | 鞍钢股份有限公司 | A kind of reuse method of dedusting ash containing zinc |
| CN107586961B (en) * | 2017-08-25 | 2019-03-26 | 鞍钢股份有限公司 | A kind of leaded dedusting ash physics method of removing lead |
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| CN101428278A (en) * | 2007-11-07 | 2009-05-13 | 首钢总公司 | Method for separating zinc-containing substance of blast furnace dry method dust separation ash |
| CN102534199A (en) * | 2012-01-18 | 2012-07-04 | 中南大学 | Comprehensive utilization process of zinc-containing iron dust |
| CN202700815U (en) * | 2012-07-25 | 2013-01-30 | 安徽华翼金属集团有限公司 | System for dedusting aluminum plastic powder |
| CN203540242U (en) * | 2013-11-06 | 2014-04-16 | 江苏省旭日冶金环保设备有限公司 | Separating pulse dust remover of high concentration dust |
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| JP3262720B2 (en) * | 1995-10-24 | 2002-03-04 | 日立造船株式会社 | Two-stage dust collection equipment and method of removing exhaust gas with two-stage dust collection equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101428278A (en) * | 2007-11-07 | 2009-05-13 | 首钢总公司 | Method for separating zinc-containing substance of blast furnace dry method dust separation ash |
| CN102534199A (en) * | 2012-01-18 | 2012-07-04 | 中南大学 | Comprehensive utilization process of zinc-containing iron dust |
| CN202700815U (en) * | 2012-07-25 | 2013-01-30 | 安徽华翼金属集团有限公司 | System for dedusting aluminum plastic powder |
| CN203540242U (en) * | 2013-11-06 | 2014-04-16 | 江苏省旭日冶金环保设备有限公司 | Separating pulse dust remover of high concentration dust |
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Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |