CN106269225A - A kind of flyash magnetic wind is combined and is selected ferrum equipment and using method thereof - Google Patents
A kind of flyash magnetic wind is combined and is selected ferrum equipment and using method thereof Download PDFInfo
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- CN106269225A CN106269225A CN201610737286.0A CN201610737286A CN106269225A CN 106269225 A CN106269225 A CN 106269225A CN 201610737286 A CN201610737286 A CN 201610737286A CN 106269225 A CN106269225 A CN 106269225A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
Abstract
The invention belongs to the solid waste utilization of resources and technical field of ferrous metallurgy, particularly a kind of flyash magnetic wind is combined and is selected ferrum equipment and using method thereof.Iron dressing machine structure is combined including a dry type magnetic separation mechanism and secondary magnetic wind, a described dry type magnetic separation mechanism includes spiral magnetic separator, drives motor and travelling gear, arranges spiral magnetic separation tube, spiral conveying tube, one section of rough concentrate discharge nozzle and one section low iron powder coal ash discharge duct in spiral magnetic separator；Described secondary magnetic wind associating iron dressing machine structure includes that one section of rough concentrate hopper, rotary micropowder nebulizer, magnetic system electric rotating machine, revolving magnetic system, atomization micropowder input pipe, Magnetic Materials sense discharge rolls, two-stage nitration magnetic thin concentrate discharge nozzle；One section low iron powder coal ash discharge duct and one section of rough concentrate hopper connection.The present invention to flyash after dry type magnetic separation dishes out major part dry type low iron powder coal ash, obtain the rough concentrate that Iron grade is 35～45%, rough concentrate, again after secondary magnetic wind is combined and selected ferrum device to throw except a part of low iron powder coal ash, can obtain meeting the iron ore concentrate that blast furnace uses requirement, Iron grade to be 50～53%.
Description
Technical field
The invention belongs to the solid waste utilization of resources and technical field of ferrous metallurgy, particularly a kind of flyash magnetic wind is combined and is selected ferrum
Equipment and using method thereof.
Background technology
Flyash is the solid waste of coal-burning power plant's discharge.According to statistics, often 1 ton of coal of burning just can produce 100～300kg
Flyash.Flyash is stored up and is not only taken up a large amount of arable land, consumes a large amount of punching ash water, and the reentrainment of dust of flyash is to ring
Border causes serious harm.Containing mineral such as pyrite, marcasite, Chalkopyrite, mispickel, siderite, Gypsum Fibrosum in coal,
In process of coal combustion, these mineral are decomposed by the high temperature of about 1450 DEG C and change, and enter into the ferrum in flyash
Main presented in bloodstone, magnetic iron ore and ferrosilite.In flyash, Iron grade is generally 7～15%, can use simple
Magnetic selection method carries out selecting ferrum.
At present, the almost all of Fe of China2O3All extract from iron ore, although China's iron ore reserves are relatively big, but
Explored high-quality iron ore reserves are limited, and major part is that difficulty selects iron ore of low ore grade, if can be by the Fe in flyash2O3With
Efficiently, the form of low consumption be used, not only can alleviate society fast-developing to Fe2O3Demand, solve flyash to soil
Take the problem with environmental pollution, and the exploitation to iron ore resource can be reduced, make flyash become a kind of cheap regeneration
Resource.
Coal dust in combustion, the volatile matter that when starting to burn, gasification temperature is relatively low first from mineral and fixed carbon it
Between gap effusion, make flyash become porous carbon granules, now the state of coal ash and granule keeps not advising of raw coal powder substantially
Then clastic, but its hole its specific surface area more is the biggest.The completely burning organic along with porous carbon granules in coal dust and temperature
Raise, mineral therein by dehydration, aoxidize, resolve into inorganic oxide, coal ash particle becomes the vitreous body of porous, although its
Form the most still remains identical with porous carbon granules, but its specific surface area is significantly less than porous carbon granules.Further along with coal dust
Burning, porous vitreum gradually contraction on melting forms granule, and its porosity constantly reduces, and degree of rounding of grains improves constantly, and particle diameter is not
Breaking and diminish, be finally changed into, by porous vitreum, the closely knit spheroid that a particle diameter is less, density is higher, specific grain surface is long-pending to be dropped to
Minimum.
The composition of flyash and character: in (1) flyash, main oxides has: SiO2、AI203、FeO+Fe203、CaO、
MgO、Ti02、Na20、K20、S03、Mn02Deng, in addition with P205Deng.(2) flyash is vitreous body, crystalline solid and the most unburned
The composite construction mixture of carbon granules composition, wherein vitreous body includes the little granule that hole in irregular shape is few, loose porous and shape
The irregular glass bead of shape, smooth spherical vitreous body particle etc..General crystalline mineral is mullite, quartz, magnesium oxide, magnetic
Iron mine, anhydrous gypsum and quick lime etc., amorphous mineral is indefinite form carbon, vitreous body and secondary limonite etc., wherein vitreous body
Content accounts for more than 50%.(3) flyash is in the burner hearth of 1200～1500 DEG C, the biggest in fire coal when coal dust is suspended state burning
Part combustible after-flame in stove, wherein incombustible is mainly mingled in high-temperature flue gas with ash form-separating, and these incombustible are because being subject to
The partial melting to high temperature action, simultaneously because capillary effect forms the most tiny spheroidal particle, along with flue gas temperature
The reduction of degree, the particulate of partial melting is cooled in vitreous, and is separated and collected before flue gas enters air, and with
The mode of dry row is discharged.
At present, the iron selection technique of flyash is divided into wet type and dry type two kinds.Flyash wet magnetic separation technique mainly utilizes powder
In coal ash, the magnetic of each granule is different with density is sorted, and it selects ferrum method to have wet magnetic separation method, wet-gravity concentration method and dry type
Magnetic method etc..(1) production technology of flyash wet magnetic separation method is: when ash aqueous mixtures is by permanent magnetic separator, flyash
In be adsorbed on rotary drum and concomitant rotation by the action of a magnetic field containing ferromagnetic particle, magnetic material divides with rotary drum after leaving magnetic field
From and be punched in iron mineral by water, and other granules are discharged with buck.Typically when in flyash, iron content is more than 5%,
One-level or two-stage magnetic separation is used to be achieved with the iron ore concentrate of higher yields and grade.(2) the production work of flyash wet-gravity concentration method
Skill is: ash aqueous mixtures uses the gravitational separation equipment such as wet type shaking table and spiral sluice to be separated from flyash by iron oxides.
Generally improve iron concentrate grade, use the method that wet-gravity concentration combines with magnetic separation.(3) production of flyash dry type magnetic separation method
Technique is: utilizes electricity and permanent magnet to produce stronger background magnetic field, produces higher magnetic field gradient by magnetic matrix simultaneously, make
The trapping ability of magnetic-particle in flyash is strengthened by it, thus reaches the purpose that in flyash, magnetic material separates.
Flyash dry magnetic separation technology has the advantages that flow process is shorter, water consumption is less, production cost is relatively low, but due to powder
The granularity of coal ash is relatively thin, often contains a certain amount of namagnetic substance, make once to do in magnetisable material selected during magnetic separation
The iron concentrate grade that formula magnetic separation obtains is relatively low, it is impossible to meet the production needs of blast furnace process.At present, domestic for improving flyash choosing
The response rate of ferrum, commonly used wet magnetic separation technique, it is higher that it obtains water content after there is the problem that flyash wet magnetic separation
Low iron powder coal ash, make the scope that utilizes of flyash reduce, the water treatment technology of flyash wet magnetic separation is complicated simultaneously and produces
Relatively costly, limit the application of this method.
On the basis of the present invention is at home and abroad to coal ash lifting ferrum technical research and utilizing, for improving flyash magnetic further
Obtain the grade of iron ore concentrate after choosing, reduce Si02Content, it is proposed that a kind of flyash magnetic wind is combined and selected ferrum method, its product produced
Product can meet the needs that blast furnace produces.
Summary of the invention
It is an object of the invention to solve the deficiencies in the prior art and provide that a kind of automaticity is high, convenient to operate, screening
Effective a kind of flyash magnetic wind is combined and is selected ferrum equipment and using method thereof.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of flyash magnetic wind is combined and is selected ferrum equipment, it is characterised in that include that a dry type magnetic separation mechanism and secondary magnetic wind combine choosing
Ferrum mechanism, a described dry type magnetic separation mechanism includes spiral magnetic separator, drives setting in motor and travelling gear, spiral magnetic separator
Spiral magnetic separation tube, spiral conveying tube, one section of rough concentrate discharge nozzle and one section low iron powder coal ash discharge duct；Described secondary magnetic wind is combined
Iron dressing machine structure includes that one section of rough concentrate hopper, rotary micropowder nebulizer, magnetic system electric rotating machine, revolving magnetic system, atomization are ultra-fine
Powder input pipe, Magnetic Materials sensing discharge rolls, two-stage nitration magnetic thin concentrate discharge nozzle；One section low iron powder coal ash discharge duct and one section coarse-fine
Mineral aggregate bucket connects.
Spiral magnetic separation tube and spiral conveying tube in described spiral magnetic separator are laid side by side, and spiral magnetic separation tube is positioned at spiral transferring
Sending above pipe, spiral magnetic separation tube and spiral conveying tube helical blade are oppositely oriented.
Described atomization micropowder input pipe is connected with fine powder negative-pressure type withdrawer and fine powder material sedimentation pipe respectively.
Described revolving magnetic system is formed by organizing magnetic piece more, and many group magnetic piece are equidistantly arranged ringwise, and magnetic system electric rotating machine drives
Revolving magnetic system rotates.
The magnetic field intensity of described spiral magnetic separation tube is 1500～1800 Oe；The magnetic field intensity of revolving magnetic system be 1000～
1200 Oe, the material of the magnetic piece of revolving magnetic system is neodymium iron boron N40 NdFeB.
Described spiral magnetic separator is connected with ash transfer supervisor, and ash transfer supervisor switches arm with ash transfer
Connecting, ash transfer switching arm and one section low iron powder coal ash discharge duct connect, and ash transfer supervisor is provided with supervisor and cuts
Changing valve, ash transfer switching arm is provided with arm switch valve.
A kind of flyash magnetic wind combines the using method selecting ferrum equipment, it is characterised in that comprise the steps:
A, flyash import
When selecting ironworker to make, opening supervisor's switch valve 3 and close arm switch valve 4, flyash is by conveying supervisor 1 importing once
Dry type magnetic separation mechanism；
B, a dry type magnetic separation
Flyash first passes through spiral magnetic separator and screens out one section of rough concentrate and low iron powder coal ash, and low iron powder coal ash is by one section of low iron powder
Coal ash discharge duct discharging, one section of rough concentrate is imported subordinate equipment magnetic separation by one section of rough concentrate discharge nozzle；
C, secondary magnetic wind are combined and are selected ferrum
One section of rough concentrate imports rotary micropowder nebulizer through one section of rough concentrate hopper and forms atomization flow of fines, is atomized fine powder
Stream is along atomization micropowder input pipe flowing under the effect of rotary micropowder nebulizer and fine powder negative-pressure type withdrawer, and atomization is thin
The flowing of powder stream forms the thin concentrate of two-stage nitration magnetic and fine powder material through revolving magnetic system magnetic separation, by two-stage nitration magnetic thin concentrate discharge nozzle
Collect the thin concentrate of two-stage nitration magnetic；
D, flyash are derived
At the end of selecting ferrum, closing supervisor's switch valve and open arm switch valve, flyash switches arm by ash transfer
Derive and do not enter back into a dry type magnetic separation mechanism.
The present invention uses tradition magnetic plant to carry out one-level according to flyash or time two-stage dry type selects ferrum, the powder of fine particle
Coal ash causes magnetic-particle and non-magnetic particle due to magnetic coagulation power, electrostatic force and other reasons (such as humidity) etc. between particles
To wrap up in material phenomenon more serious, the iron concentrate grade making magnetic separation is relatively low.But when separation of ferro uses wet-type magnetic separation method, deposit
Problem big in mortar amount, that water consumption is big, water treatment facilities are complicated, the flyash granularity produced for power plant is relatively thin, granule
In ganoid spherical, ferrum is mainly with Fe304、Fe203Situation about existing with the form such as ferrosilite, for reducing separation of ferro
The water consumption of technique, reduction are selected ferrum cost, are improved iron concentrate grade, and the present invention changes traditional method and uses brand-new flyash choosing
Iron process: flyash is after a dry-dressing machine dry separation, for improving the grade of iron ore concentrate, uses for the rough concentrate obtained after dry separation
Secondary magnetic wind is combined and is selected ferrum, by atomization, rotate magnetic separation by the way of process not in use by water.
The present invention is to flyash after a dry type magnetic separation dishes out major part dry type low iron powder coal ash, and obtaining Iron grade is
35～the rough concentrate of 45%, rough concentrate is again after secondary magnetic wind is combined and selected ferrum device to throw except a part of low iron powder coal ash, available
Meet the iron ore concentrate that blast furnace uses requirement, Iron grade to be 50～53%.
When separation of ferro uses magnetic wind integrated processes, a dry-type magnetic extractor is for improving its magnetic field intensity of metal recovery rate
It is chosen as 1500～1800 Oe.Secondary magnetic wind combine select ferrum device for improve its magnetic field intensity of iron concentrate grade be chosen as 1000
～1200 Oe.Secondary magnetic wind combine select ferrum after the secondary low iron powder coal ash that obtains be transported to former flyash pipeline again and carry.
Flyash from the top of a dry-type magnetic extractor add, flyash in spiral magnetic separation tube rotary course, Magnetic Materials
Expecting to move horizontally along with spiral magnetic separation tube rotates, in magnetic material moving process, the non-magnetic material of its folder is gradually divided
After, the non-magnetic material after separation drops to be transported to magnetic separation in spiral conveying tube, the outlet of flyash is discharged, and
Magnetic material is transported to the outlet of rough concentrate, the rough concentrate that available grade is higher.
Flyash magnetic wind selects ferrum method to be with air for sorting atomizing medium, according to spheroidal particle flyash surface more light
Sliding, the cohesive force between granule is less, in flyash iron-bearing mineral density compared with big, granule is tiny, the weight of spherical granularity flyash
Amount specific surface area is less, and granule is less to the sensitivity of wind-force, under the effect of air-flow, mechanical vibration force and magnetic, can make powder
Coal ash carries out minerals separation by density is different with magnetic.
The magnetic wind of the present invention combines the flyash selected used by ferrum device, from dry ash conveying pipeline or in the ash dropping cylinder of ash storehouse directly
Selecting takes, and magnetic wind of i.e. connecting in conveyance conduit or ash dropping cylinder is combined and selected ferrum device, is extracted by the iron powder in flyash, receives
Collection is to specifying position, and the flyash after magnetic separation returns still to proceed conveying in former conveyance conduit or ash dropping cylinder.
The present invention is according to the seriality of ash discharge in coal-burning power plant or steam boiler production process, for making to set at separation of ferro
For when overhauling or break down, the ash discharge of coal-burning power plant or steam boiler can carry continuously, sets on former ash transfer pipeline
Put bypass changeover pipeline.When separation of ferro device is properly functioning, cut off arm by switch valve, make flyash pass through choosing
Ferrum device carries out magnetic separation, and the low iron powder coal ash after magnetic separation is transported to former flyash pipeline again and carries.But work as separation of ferro
When device is stopped using, cut off by switch valve and select ferrum device portal pipeline, make flyash directly be carried by arm.
The present invention has some beneficial effect following in sum:
1, the present invention uses magnetic wind to combine and selects ferrum method, and the iron oxides in flyash can be made to obtain sufficiently with nonmagnetic powder coal ash
Separate, improve grade and the metal recovery rate of iron ore concentrate.
2, the present invention uses magnetic wind to combine and selects ferrum method, has that magnetic field intensity is high, gradient big, save excitatory energy consumption, process
The feature that ability is big.
3, the separation of ferro that this method uses is compared with mine, it is not necessary to open a mine, the technique such as broken and ball milling, has life
The advantages such as runoff yield journey is simple, small investment, saving manpower.
Accompanying drawing explanation
Fig. 1 is present device structural representation；
Fig. 2 is present invention process flow chart.
In figure: ash transfer supervisor 1, ash transfer switching arm 2, supervisor switch valve 3, arm switch valve 4,
Spiral magnetic separator 5, spiral magnetic separation tube 6, spiral conveying tube 7, driving motor 8,9, one section of rough concentrate discharge nozzle 10, of travelling gear
Section 11, one section of rough concentrate hopper 12 of low iron powder coal ash discharge duct, electromagnetic vibrator 13, rotary micropowder nebulizer 14, magnetic system
Electric rotating machine 15, revolving magnetic system 16, atomization micropowder input pipe 17, fine powder negative-pressure type withdrawer 18, fine powder material sedimentation pipe 19, magnetic
Property thing sensing discharge rolls 20, two-stage nitration magnetic thin concentrate discharge nozzle 21.
Detailed description of the invention
A kind of flyash magnetic wind is combined and is selected ferrum equipment, it is characterised in that include a dry type magnetic separation mechanism and secondary magnetic wind connection
Closing iron dressing machine structure, a described dry type magnetic separation mechanism includes spiral magnetic separator 5, drives motor 8 and travelling gear 9, spiral magnetic separation
Spiral magnetic separation tube 6,7, one section of rough concentrate discharge nozzle 10 of spiral conveying tube and one section low iron powder coal ash discharge duct 11 are set in device 5；
Described secondary magnetic wind associating iron dressing machine structure includes one section of rough concentrate hopper 12, rotary micropowder nebulizer 14, magnetic system electric rotating
Machine 15, revolving magnetic system 16, atomization micropowder input pipe 17, Magnetic Materials sensing discharge rolls 20, two-stage nitration magnetic thin concentrate discharge nozzle 21；
One section low iron powder coal ash discharge duct 11 connects with one section of rough concentrate hopper 12.
Spiral magnetic separation tube 6 and spiral conveying tube 7 in described spiral magnetic separator 5 are laid side by side, and spiral magnetic separation tube 6 is positioned at spiral shell
Above rotation conveying pipe 7, spiral magnetic separation tube 6 and spiral conveying tube 7 helical blade are oppositely oriented.Described atomization micropowder input pipe 17
It is connected with fine powder negative-pressure type withdrawer 18 and fine powder material sedimentation pipe 19 respectively.Described revolving magnetic system 16 is formed by organizing magnetic piece more, many
Group magnetic piece is equidistantly arranged ringwise, and magnetic system electric rotating machine 15 is rotated magnetic system 16 rotation.The magnetic field of described spiral magnetic separation tube 6
Intensity is 1500～1800 Oe；The magnetic field intensity of revolving magnetic system 16 is 1000～1200 Oe, the material of the magnetic piece of revolving magnetic system 16
Matter is neodymium iron boron N40 NdFeB.Described spiral magnetic separator 5 is connected with ash transfer supervisor 1, ash transfer supervisor 1 and powder
Coal ash conveying switching arm 2 connects, and ash transfer switching arm 2 is connected with one section low iron powder coal ash discharge duct 11, flyash
Conveying supervisor 1 is provided with supervisor's switch valve 3, and ash transfer switching arm 2 is provided with arm switch valve 4.
A kind of flyash magnetic wind combines the using method selecting ferrum equipment, comprises the steps:
A, flyash import
Flyash selects the flyash that thermal power plant boiler or steam boiler produce, and its granularity accounts for 70～80% for-200 mesh, Iron grade
Be 7～15%, Si02Content 45～50%, A1203Content 20～25%, CaO content 2～5%, carbon granules content 1～the grey type of 3%.Ferrum
During work, opening supervisor's switch valve 3 and close arm switch valve 4, flyash is by conveying supervisor 1 dry type magnetic separation of importing
Mechanism；
B, a dry type magnetic separation
Flyash first passes through spiral magnetic separator 5 and screens out one section of rough concentrate and low iron powder coal ash, and low iron powder coal ash is by one section of low ferrum
Flyash discharge duct 11 discharging, one section of rough concentrate is imported subordinate equipment magnetic separation by one section of rough concentrate discharge nozzle 10；Obtain Iron grade
It is 35～a rough concentrate of 45% and the lowest iron powder coal ash.
C, secondary magnetic wind are combined and are selected ferrum
One section of rough concentrate imports rotary micropowder nebulizer 14 through one section of rough concentrate hopper 12 and forms atomization flow of fines, atomization
Flow of fines is edge atomization micropowder input pipe 17 under the effect of rotary micropowder nebulizer 14 and fine powder negative-pressure type withdrawer 18
Flowing, forms the thin concentrate of two-stage nitration magnetic and fine powder material through revolving magnetic system 16 magnetic separation, by two-stage nitration magnetic in atomization flow of fines flowing
The thin concentrate of two-stage nitration magnetic collected by the thin concentrate discharge nozzle 21 of property；The Iron grade of the thin concentrate of two-stage nitration magnetic is up to 50～53%.
D, flyash are derived
At the end of selecting ferrum, closing supervisor's switch valve 3 and open arm switch valve 4, flyash is by ash transfer switching
Pipe 2 is derived and is not entered back into a dry type magnetic separation mechanism.
Claims (7)
1. a flyash magnetic wind is combined and is selected ferrum equipment, it is characterised in that include a dry type magnetic separation mechanism and the associating of secondary magnetic wind
Iron dressing machine structure, a described dry type magnetic separation mechanism includes spiral magnetic separator (5), drives motor (8) and travelling gear (9), spiral
Spiral magnetic separation tube (6), spiral conveying tube (7), one section of rough concentrate discharge nozzle (10) and one section low iron powder coal are set in magnetic separator (5)
Ash discharge duct (11)；Described secondary magnetic wind associating iron dressing machine structure includes one section of rough concentrate hopper (12), the atomization of rotary micropowder
Device (14), magnetic system electric rotating machine (15), revolving magnetic system (16), atomization micropowder input pipe (17), Magnetic Materials sensing discharge rolls
(20), two-stage nitration magnetic thin concentrate discharge nozzle (21)；One section low iron powder coal ash discharge duct (11) is with one section of rough concentrate hopper (12) even
Logical.
A kind of flyash magnetic wind the most according to claim 1 is combined and is selected ferrum equipment, it is characterised in that described spiral magnetic separator
(5) spiral magnetic separation tube (6) and spiral conveying tube (7) in are laid side by side, and spiral magnetic separation tube (6) is positioned on spiral conveying tube (7)
Side, spiral magnetic separation tube (6) and spiral conveying tube (7) helical blade are oppositely oriented.
A kind of flyash magnetic wind the most according to claim 1 is combined and is selected ferrum equipment, it is characterised in that described atomization micropowder
Input pipe (17) is connected with fine powder negative-pressure type withdrawer (18) and fine powder material sedimentation pipe (19) respectively.
A kind of flyash magnetic wind the most according to claim 1 is combined and is selected ferrum equipment, it is characterised in that described revolving magnetic system
(16) forming by organizing magnetic piece, many group magnetic piece are equidistantly arranged ringwise, and magnetic system electric rotating machine (15) is rotated magnetic system (16) more
Rotate.
A kind of flyash magnetic wind the most according to claim 4 is combined and is selected ferrum equipment, it is characterised in that described spiral magnetic separation tube
(6) magnetic field intensity is 1500～1800 Oe；The magnetic field intensity of revolving magnetic system (16) is 1000～1200 Oe, revolving magnetic system
(16) material of magnetic piece is neodymium iron boron N40 NdFeB.
A kind of flyash magnetic wind the most according to claim 1 is combined and is selected ferrum equipment, it is characterised in that described spiral magnetic separator
(5) being connected with ash transfer supervisor (1), ash transfer supervisor (1) is connected with ash transfer switching arm (2), fine coal
Ash conveying switching arm (2) is connected with one section low iron powder coal ash discharge duct (11), and ash transfer supervisor (1) is provided with supervisor and cuts
Changing valve (3), ash transfer switching arm (2) is provided with arm switch valve (4).
7. the using method selecting ferrum equipment is combined according to flyash magnetic wind a kind of described in any one of claim 6, it is characterised in that
Comprise the steps:
A, flyash import
When selecting ironworker to make, opening supervisor's switch valve (3) and close arm switch valve (4), flyash is led by conveying supervisor (1)
Enter a dry type magnetic separation mechanism；
B, a dry type magnetic separation
Flyash first passes through spiral magnetic separator (5) and screens out one section of rough concentrate and low iron powder coal ash, and low iron powder coal ash is low by one section
Iron powder coal ash discharge duct (11) discharging, one section of rough concentrate is imported subordinate equipment magnetic separation by one section of rough concentrate discharge nozzle (10)；
C, secondary magnetic wind are combined and are selected ferrum
One section of rough concentrate imports rotary micropowder nebulizer (14) through one section of rough concentrate hopper (12) and forms atomization flow of fines,
Atomization flow of fines is edge atomization micropowder under the effect of rotary micropowder nebulizer (14) and fine powder negative-pressure type withdrawer (18)
Input pipe (17) flows, and forms the thin concentrate of two-stage nitration magnetic and fine powder through revolving magnetic system (16) magnetic separation in atomization flow of fines flowing
Material, collects the thin concentrate of two-stage nitration magnetic by two-stage nitration magnetic thin concentrate discharge nozzle (21)；
D, flyash are derived
At the end of selecting ferrum, closing supervisor's switch valve (3) and open arm switch valve (4), flyash is cut by ash transfer
Change arm (2) derivation and do not enter back into a dry type magnetic separation mechanism.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107159426A (en) * | 2017-04-27 | 2017-09-15 | 酒泉钢铁(集团)有限责任公司 | A kind of slag is secondary to select iron method |
| CN110243656A (en) * | 2019-06-10 | 2019-09-17 | 大唐淮北发电厂 | A kind of coal sample preparation deironing apparatus with iron filings clearing function |
| WO2021114515A1 (en) * | 2019-12-10 | 2021-06-17 | 成都利君实业股份有限公司 | Micro-powder dry magnetic separator |
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| CN110243656B (en) * | 2019-06-10 | 2022-03-15 | 大唐淮北发电厂 | Coal system appearance is with deironing device with iron fillings clearance function |
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Application publication date: 20170104 |