CN105195427B - A kind of iron ore dry separation technique based on dense gas solid bed - Google Patents
A kind of iron ore dry separation technique based on dense gas solid bed Download PDFInfo
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- CN105195427B CN105195427B CN201510703985.9A CN201510703985A CN105195427B CN 105195427 B CN105195427 B CN 105195427B CN 201510703985 A CN201510703985 A CN 201510703985A CN 105195427 B CN105195427 B CN 105195427B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
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Abstract
A kind of iron ore dry separation technique based on dense gas solid bed, belongs to iron ore dry separation technique.Iron ore is crushed, is sieved by double deck screen, 6 100mm grades materials are processed by gas-solid dense media fluid-bed separator and obtain float and hypostasis；1 6mm grades material is sorted by vibrated fluidized bed, by closed circuit grinding after the rougher concentration de-mediated that sorting is obtained, feed dry type strong magnetic separator selected, concentrate and tailings is obtained, and being classified the material less than 1mm for obtaining needs concentrate and tailings to be obtained by one section of closed circuit grinding, one section of low intensity magnetic separation and one section of high intensity magnetic separation；The medium solid for being mixed in fluid bed separation product is screened out by sculping screen, then Jing magnetic separation removes non-magnetic impurity therein and magnetic concentrate obtained as recovering medium recycling；System is provided with blower unit and reclaims the dust that assorting room is produced.The technique is all sorted using physical dry, need not consume water resource, and energy-conserving and environment-protective are significant to the efficient utilization and energy-saving and emission-reduction of China's iron ore resource.
Description
Technical field
The present invention relates to a kind of iron ore dry separation technique, and in particular to a kind of iron mine based on dense gas solid bed
Stone dry separation technique.
Technical background
China's iron ore resource rich reserves, with the reserves day of the development of steel and iron industry, high-grad iron ore deposit and the lean iron mines of Yi Xuan
Become exhausted.Domestic steel industry depends on import resources too much, is the supply security for ensureing China's iron ore resource, carries out ferrum
The efficient separation technical research of Ore has important strategic importance.
Iron ore dressing is typically with the methods such as calcining magnetic separation, flotation, gravity treatment and high intensity magnetic separation at present.Using calcining magnetic separation
Method be that Ore is heated to after uniform temperature and is carried out in corresponding atmosphere physical-chemical reaction so that the magnetic of iron ore
Property significantly increase and gangue mineral magnetic is constant, and then higher separation index is obtained by low intensity magnetic separation, but its energy consumption is big, cost
Height, industrial applications are difficult；Difference of the flotation using mineral surfaces wettability, selective heads realize useful ore deposit
Thing is separated with gangue mineral, and flotation can process fine-particle minerals, has preferably sorting effect for iron ore desiliconization, dephosphorization
Really, but due to iron ore itself have embedding cloth is thin, clay content is big, easy argillization the characteristics of had a strong impact on floatation indicators；Some ferrum
The magnetic of Ore is weaker, needs to sort by strong magnetic separator, the product of the raising iron ore concentrate that current high intensity magnetic separation can not be by a relatively large margin
Position, it is impossible to obtain high-grade iron ore concentrate, is generally used for pre- throwing tail and desliming；Gravity treatment, can according to mineral density differential separation
More high-grade iron ore concentrate is obtained, but the response rate is generally relatively low.
The content of the invention
The invention aims to provide a kind of iron ore dry separation technique based on dense gas solid bed, solve existing
There are consumption and problem of environmental pollution of the iron ore wet split to water resource.
The object of the present invention is achieved like this：Sorting process includes：The raw ore preparatory stage, the stage of roughly selecting, the selected stage,
Dense medium purifica tion stage, air feed stage and dedusting stage；The described raw ore preparatory stage is broken in advance and is dried, carries for fluid bed
For granularity, the satisfactory raw material of pan feeding moisture；It is described roughly select the stage include respectively gas-solid dense media fluid bed separation and
Vibrated fluidized bed is sorted；The described selected stage includes ore grinding, classification, low intensity magnetic separation and high intensity magnetic separation process；Described dense medium purifica tion
Stage includes the de-mediated of gas-solid dense medium fluidized bed and vibrated fluidized bed sorted product, and is mingled with during dry type magnetic separation removes medium
Nonmagnetics ensure medium abundant recovery and recycle；It is empty that the described air feed stage provides enough compressions for fluid bed
Gas, the dust produced in dedusting stage removal assorting room, it is to avoid pollution working environment.
Concrete technology is as follows：
A, raw iron ores Jing jaw crushing crusher machines, and be that 6mm sieves and 100mm are sieved by double deck screen, its
Middle granularity returns disintegrating machine more than the Ore of 100mm and breaks again, and the material of 6-100mm grades enters raw ore surge bunker, less than 6mm's
Material will enter follow-up classification and grinding operation；Whether Ore into raw ore surge bunker need to check moisture more than 5%, no
Then need to be dried process, fluid-bed separator after pan feeding moisture is qualified, can be fed；
In b, raw ore surge bunker, 6-100mm grades dry materials are qualified rear into gas-solid dense medium fluidized bed to pan feeding moisture
Sorting, 1-6mm grade materials enter vibrated fluidized bed, and below 0.5mm materials are then sorted by dry-type magnetic extractor；
C, Jing after the vibrated fluidized bed product de-media that obtains of sorting through closed circuit grinding, one section of high intensity magnetic separation, obtain concentrate and
Mine tailing, and the raw ore amenorrhea road ore grinding less than 1mm obtained by raw ore classification, one section of low intensity magnetic separation and one section of high intensity magnetic separation obtain magnetic separation
Concentrate and tailings；
The product Jing sculping screens removing medium that the sorting of d, gas-solid dense medium fluidized bed and vibrated fluidized bed is obtained, by dry type
Magnetic separation recovery is utilized；The non-magnetic impurity that removal is mingled with, realizes dense medium purifica tion, according to the loss of assorting room medium, needs to supplement
New medium is entered in system；
The medium solid used in e, fluid-bed separator is atomization ferrosilicon powder, according to the sorting of different type iron ore, can
Different gas speed, the height of bed, the ferrosilicon powder of different silicone contents and corresponding particle size range is selected to make fluidized bed densities in 2.5-
4.2g/cm3In the range of it is adjustable；
F, the compressed air of fluid bed separation equipment are provided by air feed system, the dust produced in system operation, by
Dust pelletizing system is removed.
Beneficial effect, as a result of such scheme, based on dense gas solid bed sorting process, fully with reference to fluidization
Sorting and the respective advantage of high intensity magnetic separation, realize the wholegrain level dry separation of iron ore, it is to avoid right in iron ore wet split
The consumption and environmental pollution of water resource.In the present invention program, medium solid is atomization ferrosilicon, and its granule is mostly spheroidal particle, flows
Property is good, defines the fluidized-bed layer with stable density.Fluidized bed densities can need spirit according to the sorting of different type iron ore
Regulation and control living；Due to using Single Medium, recovery process is simple, solves binary medium solid fluidisation in existing fluid bed separation technology
Bed density stability is poor, the technical barrier of binary medium difficult separation and recycling.
Advantage：With device structure is simple, low cost, water resource need not be expended, the advantage such as little is polluted, being the rare ferrum of China
The exploitation of ore resource provide a new way.
Description of the drawings
Fig. 1 is the sorting process schematic diagram of the iron ore of the present invention.
Specific embodiment
The invention will be further described for embodiment in below in conjunction with the accompanying drawings：
The sorting process of the present invention includes：Raw ore preparatory stage, the stage of roughly selecting, selected stage, dense medium purifica tion stage, air feed
Stage and dedusting stage；The described raw ore preparatory stage be it is in advance broken and be dried, that granularity, pan feeding moisture are provided for fluid bed is equal
Satisfactory raw material；The described stage of roughly selecting includes that gas-solid dense media fluid bed separation and vibrated fluidized bed are sorted respectively；Institute
The selected stage stated includes ore grinding, classification, low intensity magnetic separation and high intensity magnetic separation process；The described dense medium purifica tion stage includes gas-solid dense media
The de-mediated of fluid bed and vibrated fluidized bed sorted product, and the nonmagnetics guarantee medium being mingled with during dry type magnetic separation removes medium
Abundant recovery and recycle；The described air feed stage provides enough compressed airs for fluid bed, and the dedusting stage removes divides
The dust produced during choosing, it is to avoid pollution working environment.
Concrete technology flow process is as follows：
A, raw iron ores Jing jaw crushing crusher machines, and be that 6mm sieves and 100mm are sieved by double deck screen, its
Middle granularity returns disintegrating machine more than the Ore of 100mm and breaks again, and the material of 6-100mm grades enters raw ore surge bunker, less than 6mm's
Material will enter follow-up classification and grinding operation；Whether Ore into raw ore surge bunker need to check moisture more than 5%, no
Then need to be dried process, fluid-bed separator after pan feeding moisture is qualified, can be fed；
In b, raw ore surge bunker, 6-100mm grades dry materials are qualified rear into gas-solid dense medium fluidized bed to pan feeding moisture
Sorting, 1-6mm grade materials enter vibrated fluidized bed, and below 0.5mm materials are then sorted by dry-type magnetic extractor；Sorting section
Dry separation equipment be dense gas solid bed separator, vibrated fluidized bed separator and magnetic separator；
C, Jing after the vibrated fluidized bed product de-media that obtains of sorting through closed circuit grinding, one section of high intensity magnetic separation, obtain concentrate and
Mine tailing, and the raw ore amenorrhea road ore grinding less than 1mm obtained by raw ore classification, one section of low intensity magnetic separation and one section of high intensity magnetic separation obtain magnetic separation
Concentrate and tailings；
The product Jing sculping screens removing medium that the sorting of d, gas-solid dense medium fluidized bed and vibrated fluidized bed is obtained, by dry type
Magnetic separation recovery is utilized；The non-magnetic impurity that removal is mingled with, realizes the purification of medium, according to the loss of assorting room medium, needs to mend
Fill new medium to enter in system；
The medium solid used in e, fluid-bed separator is atomization ferrosilicon powder, according to the sorting of different type iron ore, can
Different gas speed, the height of bed, the ferrosilicon powder of different silicone contents and corresponding particle size range is selected to make fluidized bed densities in 2.5-
4.2g/cm3In the range of it is adjustable；Required to can select the ferrosilicon of difference silicone content, structure adjusting gas speed, bed according to different separating densities
High, ferrosilicon particle size range and silicone content can cause fluid bed to obtain optimal separation index；Iron ore sorting in this example, employing
Silicon iron powder particle size range is about 6% from the silicone content of ferrosilicon based on -200+60 mesh (0.3mm-0.075mm)；
F, the compressed air of fluid bed separation equipment are provided by air feed system, the dust produced in system operation, by
Dust pelletizing system is removed.
Embodiment 1：The dense gas solid bed of iron ore of the present invention is included with dry type magnetic separation process integration：Ore
Preparatory stage, the stage of roughly selecting, selected stage, dense medium purifica tion stage and air feed stage and dedusting stage.
Concrete technology flow process：
1st, raw ore, through jaw crushing crusher machine, is that 6mm sieves and 100mm are sieved by double deck screen, more than 100mm
Return disintegrating machine break again, if 6-100mm grade Ores moisture also needs dried more than 5%, can after pan feeding moisture is qualified
Gas-solid dense medium fluidized bed is fed, the Ore less than 6mm is into subsequent hierarchical process；
2nd, 6-100mm grades Ore obtains float and hypostasis by fluid bed separation, and by 1mm sculping screen de-mediated, sinks
Produce product are merged into Ore less than 6mm in raw ore after the closed circuit grinding operation that dry grinding mill and 6mm classifying screens are constituted
Enter 1mm classifying screens, the Ore more than 1mm is sorted into vibrated fluidized bed, the material less than 1mm enters grinding operation；
3rd, the product that obtains of vibrated fluidized bed sorting need Jing after de-mediated, also it is selected through closed circuit grinding and one section of high intensity magnetic separation,
It is selected that raw ore less than 1mm enters closed circuit grinding, one section of low intensity magnetic separation and one section of high intensity magnetic separation；
4th, the iron ore into selected operation need to make material meet dry-type magnetic extractor material size requirement by closed circuit grinding,
As the gangue mineral disseminated grain size of different iron ores has differences, grinding particle size may be selected 0.5/0.25/0.1mm according to demand
Etc. different size, dry-type magnetic selection apparatus include the drum magnetic separator of low intensity magnetic separation, the Induced Roll Magnetic Separator or disc type of high intensity magnetic separation
Magnetic separator；What weak magnetic separation equipment was selected is drum magnetic separator, and high intensity magnetic separation equipment choosing is Induced Roll Magnetic Separator or disc electromagnetic
Select machine；
5th, the dense media that fluid bed separation process is reclaimed, needs to remove non-magnetic impurity therein by magnetic separation, reaches net
Change purpose, reuse in finally returning to fluid bed, according to the loss of medium, need to add a certain amount of new medium in system；
6th, the compressed air of fluid bed separation equipment is provided by air feed system, the dust produced in system operation, by
Dust pelletizing system is removed.
The above is only the preferred embodiment of the present invention, is not limited to the present invention.Without departing from of the invention former
On the premise of reason, the present invention can have various change and a change, all modifications of the present invention and convert in the present invention on an equal basis
Protection domain within.
Claims (1)
1. a kind of iron ore dry separation technique based on dense gas solid bed, it is characterised in that：Sorting process includes：Raw ore
Preparatory stage, the stage of roughly selecting, selected stage, dense medium purifica tion stage, air feed stage and dedusting stage；The described raw ore preparatory stage
It is broken in advance and dry, provides for fluid bed granularity, pan feeding moisture satisfactory raw material；Described roughly selects stage difference
Including gas-solid dense media fluid bed separation and vibrated fluidized bed sorting；The described selected stage include ore grinding, classification, low intensity magnetic separation and
High intensity magnetic separation process；The described dense medium purifica tion stage includes the de-mediated of gas-solid dense medium fluidized bed and vibrated fluidized bed sorted product,
And the nonmagnetics being mingled with dry type magnetic separation removal medium ensures the abundant recovery of medium and recycles；Described air feed rank
Section provides enough compressed airs, the dust produced in dedusting stage removal assorting room, it is to avoid pollution building ring for fluid bed
Border；
Concrete technology is as follows：
A, raw iron ores Jing jaw crushing crusher machines, and be that 6mm sieves and 100mm are sieved by double deck screen, wherein grain
Degree returns disintegrating machine more than the Ore of 100mm and breaks again, and the material of 6-100mm grades enters raw ore surge bunker, less than the material of 6mm
Follow-up classification and grinding operation will be entered；Ore into raw ore surge bunker need to check that moisture, whether more than 5%, is otherwise needed
Process is dried, fluid-bed separator after pan feeding moisture is qualified, can be fed；
In b, raw ore surge bunker, 6-100mm grades dry materials are qualified rear into gas-solid dense medium fluidized bed point to pan feeding moisture
Choosing, 1-6mm grade materials enter vibrated fluidized bed, and below 0.5mm materials are then sorted by dry-type magnetic extractor；
C, Jing after the vibrated fluidized bed product de-media that obtains of sorting through closed circuit grinding, one section of high intensity magnetic separation obtains concentrate and tailings,
And the raw ore amenorrhea road ore grinding less than 1mm obtained by raw ore classification, one section of low intensity magnetic separation and one section of high intensity magnetic separation obtain magnetic concentrate
And mine tailing；
The product Jing sculping screens removing medium that the sorting of d, gas-solid dense medium fluidized bed and vibrated fluidized bed is obtained, by dry type magnetic separation
Recycle；The non-magnetic impurity that removal is mingled with, realizes the purification of medium, according to the loss of assorting room medium, need to supplement new
Medium enter system in；
The medium solid used in e, fluid-bed separator is atomization ferrosilicon powder, according to the sorting of different type iron ore, may be selected
Different gas speed, the height of bed, the ferrosilicon powder of different silicone contents and corresponding particle size range make fluidized bed densities in 2.5-4.2g/
cm3In the range of it is adjustable；
F, the compressed air of fluid bed separation equipment are provided by air feed system, the dust produced in system operation, by dedusting
System is removed.
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| CN105855019B (en) * | 2016-05-24 | 2018-09-21 | 中国地质科学院郑州矿产综合利用研究所 | Ultrafine crushing-grading magnetic separation method for magnetite |
| CN106607183B (en) * | 2017-02-09 | 2019-11-08 | 中国矿业大学 | A kind of modular high-density coal measures oil shale process for upgrading and upgrading system |
| CN109317289A (en) * | 2018-11-14 | 2019-02-12 | 王光领 | Dry sand medium preparation process is used on air dry sand Recognition Applied in Coal Preparation System |
| CN113981209A (en) * | 2021-10-14 | 2022-01-28 | 辽宁科技大学 | Method for recovering zinc and iron in blast furnace gas dust |
| CN114849892A (en) * | 2022-05-07 | 2022-08-05 | 金易通（天津）智能装备有限公司 | Dry dust-free lump material dry separation method and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318182A (en) * | 2008-06-11 | 2008-12-10 | 中国矿业大学 | Modular coal preparation process and equipment based on gas-solid diphasic stream |
| CN101716553A (en) * | 2009-12-28 | 2010-06-02 | 河南理工大学 | Kiln slag processing technology of zinc volatilizing kiln |
| CN103041920A (en) * | 2012-12-19 | 2013-04-17 | 太原钢铁(集团)有限公司 | Ore dressing method and ore dressing system suitable for lean magnetite ores |
| CN103769292A (en) * | 2014-01-10 | 2014-05-07 | 中钢集团马鞍山矿山研究院有限公司 | High-mud-content and high-grade composite iron ore preconcentration technology |
| CN204564293U (en) * | 2015-02-03 | 2015-08-19 | 沈阳隆基电磁科技股份有限公司 | A kind of ilmenite preparation equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9505033B2 (en) * | 2014-01-29 | 2016-11-29 | Tarkett Inc. | Method and system for processing and recycling infill material of artificial turf |
-
2015
- 2015-10-26 CN CN201510703985.9A patent/CN105195427B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318182A (en) * | 2008-06-11 | 2008-12-10 | 中国矿业大学 | Modular coal preparation process and equipment based on gas-solid diphasic stream |
| CN101716553A (en) * | 2009-12-28 | 2010-06-02 | 河南理工大学 | Kiln slag processing technology of zinc volatilizing kiln |
| CN103041920A (en) * | 2012-12-19 | 2013-04-17 | 太原钢铁(集团)有限公司 | Ore dressing method and ore dressing system suitable for lean magnetite ores |
| CN103769292A (en) * | 2014-01-10 | 2014-05-07 | 中钢集团马鞍山矿山研究院有限公司 | High-mud-content and high-grade composite iron ore preconcentration technology |
| CN204564293U (en) * | 2015-02-03 | 2015-08-19 | 沈阳隆基电磁科技股份有限公司 | A kind of ilmenite preparation equipment |
Non-Patent Citations (1)
| Title |
|---|
| 模块式干法重介质流化床选煤理论与工业应用;赵跃民等;《煤炭学报》;20140831;第39卷(第8期);说明书第229-287段及附图1-2 * |
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