CN104815739B - Magnetite dry grinding and dry separation method and device - Google Patents
Magnetite dry grinding and dry separation method and device Download PDFInfo
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- CN104815739B CN104815739B CN201510237394.7A CN201510237394A CN104815739B CN 104815739 B CN104815739 B CN 104815739B CN 201510237394 A CN201510237394 A CN 201510237394A CN 104815739 B CN104815739 B CN 104815739B
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- dry
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- pressure roller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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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
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a magnetite dry grinding and dry separation method and a magnetite dry grinding and dry separation device, and belongs to the technical field of iron ore selection and grinding. The method comprises the steps of mixing secondarily crushed ore with particle size less than 80mm and coarse-grain return scrap to obtain a mixture I, extruding the mixture I by virtue of a high pressure roller, and mechanically screening the mixture I, wherein the screening granularity is 3mm; returning an oversize product adopted as the coarse-grain return scrap to the high pressure roller to be continuously extruded, separating screen underflow in a dry-type magnetic separator, grading rough concentrate separated by the dry-type magnetic separator by virtue of a wind power powder separation machine, returning coarse powder graded by the wind power powder separation machine and adopted as coarse-grain return scrap to the high pressure roller to be continuously extruded, collecting fine powder meeting the fineness requirement of iron fine powder after the grading of the wind power powder separation machine, separating the fine powder by virtue of the dry-type magnetic separator, and finally carrying out the wet-type magnetic separation for fine magnetic minerals meeting the fineness requirement of the iron fine powder after the separation of the dry-type magnetic separator. By adopting the magnetite dry grinding and dry separation method, the crushing grinding and the magnetic separation of the ore are reasonably matched, so that the system energy consumption is reduced, consumption of steel and water is reduced, and the environmental pollution is alleviated.
Description
Technical field
The invention belongs to iron ore beneficiation ore grinding technical field.
Background technology
In magnetite separation industry, the preparation of Iron concentrate needs to reach certain taste and fineness, by iron mine raw ore
During granularity is tapered and taste is gradually stepped up, as efficiency of magnetic separation and iron mine granularity have obvious relation, and to reach
Certain granularity needs corresponding acting, energy consumption, it is considered to the maximization of economic benefit, it is necessary to reasonable selection magnetic separation correspondence at different levels
Ore grain size.Traditional crushing and grinding mainly by disintegrating machine and tube mill completing, as disintegrating machine receives equipment performance and electricity
Consumption is limited, and can only be carried out to the stage in small, broken bits（Typically it is crushed to<12mm）, then by tube mill come complete corase grind and fine grinding, and
The magnetic separation granularity for entering the front Ore of mill is also bigger than normal（Generally<12mm）, efficiency of magnetic separation has much room for improvement, and the full iron recovery of iron mine is relatively low.
Tube mill power consumption steel consumption is higher, and general fine grinding all adopts wet ball-milling, and water consumption is big, tailings glass high cost, to environment
Pollution is larger.Also some technologies were introduced into high-pressure roller mill in the grinding system of iron ore in recent years, but simply instead of part
In small, broken bits and corase grind, solves the problems, such as disintegrating machine discharging-material size considerable influence efficiency of magnetic separation, but the thing after high-pressure roller mill grinding
Material also needs to carry out fine grinding by tube mill, and the problem big to tube mill high energy consumption and water consumption is not fully solved.
The content of the invention
It is an object of the invention to：For using traditional iron mine handling process, the grinding pow consumption steel consumption of Ore is higher, consumption
The water yield is big, and wet mine tailing amount is big, and processing cost is high, and the granularity of mine tailing Ore magnetic separation is integrally higher, and efficiency of magnetic separation is low, and full ferrum is reclaimed
Rate is low, and as pipe mill ability is limited so that raw ore treatment scale is limited, it is difficult to maximize.The present invention is above-mentioned to solve
Problem provides a kind of new method and apparatus, will be the crushing and grinding of Ore and magnetic separation reasonably combined, reduces system energy consumption, steel
Consumption, water consume alleviate the pollution to environment.
The object of the invention is realized by following technical proposals：
A kind of magnetic iron ore dry grinding dry dressing method, be：In it is broken after<The Ore of 80mm returns material with coarse grain and mixes, Jing Guogao
After pressure roller extruding, mechanical grading is delivered to, Sieving and casing is 3mm, and oversize returns material return high pressure roller as the coarse grain to be continued
Extruding, siftage are sorted into dry-type magnetic extractor, and the rough concentrate of dry-type magnetic extractor sorting delivers to the classification of wind-force powder concentrator, winnowing
Coarse powder after the classification of powder machine also serves as the coarse grain and returns material return high pressure roller continuation extruding, reaches ferrum after the classification of wind-force powder concentrator
After the fines collection of fine powder fineness requirement, dry-type magnetic extractor sorting is delivered to, Haematite powder fineness is reached after dry-type magnetic extractor sorting will
The thin magnetic ore deposit asked finally carries out wet magnetic separation.
In such scheme, after supplied materials is extruded by high pressure roller mill, Iron concentrate fineness requirement after sorting by granularity twice, is reached,
Coarse granule after no longer needing follow-up grinding machine grinding, each granularity to sort returns high pressure roller and continues extruding, and fine grained carries out one
Secondary dry type magnetic separation, thus improves Ore taste in the dry separation stage, reduces wet magnetic separation proportion, and water consumption is little, wet mine tailing amount
It is little.The high pressure roller refers to roll squeezer or high-pressure roller mill；The fine powder of the Iron concentrate fineness requirement/thin magnetic ore deposit refers to 200 mesh
Sieve is by 50-70%, different according to different iron mine percent of pass.Specifically there are following substantive distinguishing features：
（1）Disintegrating machine is needed to arrive Ore in small, broken bits in hinge structure<12mm, then by tube mill come complete corase grind and
Fine grinding, all substitutes traditional in small, broken bits and two-stage pipe pulverizing grinding process by high pressure roller mill in aforementioned schemes of the present invention, by high pressure roller
Mill whole grinding technology of the complete independently to Ore, reaches granularity requirements of the Ore magnetic separation to breeze, reduces traditional ore grinding work
Skill power consumption and steel consumption.
（2）According to iron mine characteristic, select powder and winnowing powder to combine using machinery and complete the particle size separation technique side of breeze
Method, high pressure roller discharging first time granularity are sorted and are completed using mechanical picker, greatly reduce system power consumption, and second granularity is sorted adopts
Powder concentrator pneumatic separating is used, the Iron concentrate of qualified fineness is selected.Meanwhile, select powder and winnowing powder to combine technique using machinery,
Both the magnetic separation requirement step by step of Ore gradation degree stage by stage had been met, the sieve of the unappeasable subparticle of mechanical grading had been solved again
Point, also reduce the high problem of the system power consumption for bringing using winnowing powder completely.
（3）Specific selected 3mm is Sieving and casing, adopts dry type magnetic separation to below 3mm granules, both can guarantee that full ferrum is reclaimed
Rate, can improve efficiency of magnetic separation again, and thoroughly solve the problems, such as that the water consumption of wet magnetic separation technique is big.
Alternatively, in it is broken after Ore further it is in small, broken bits extremely<After 30mm, material is returned with coarse grain and mixed, into high pressure roller
Extruding.
In such scheme, roll squeezer part substitutes in small, broken bits and substitutes corase grind and fine grinding completely：Only need it is in advance in small, broken bits extremely<
30mm, remaining part is in small, broken bits and corase grind, fine grinding process are all completed by roll squeezer.
Alternatively, the mechanical grading is linear vibrating screen.
Alternatively, the fine powder for Iron concentrate fineness requirement being reached after the wind-force powder concentrator classification is received by bag collector
Collection.
Used as further selecting, the air path system of the wind-force powder concentrator is by wind-force powder concentrator and the waste gas after bag collector
Blower fan is completed, and natural wind is introduced in wind-force powder concentrator, and the dust-laden wind after powder concentrator is separated enters bag collector, after gathering dust
Clean gas outside arrange.
A kind of device of dry dressing method of dry grinding for aforementioned magnetic iron ore, including high pressure roller, dry-type magnetic extractor, mechanical picker subpackage
Put, wind-force powder concentrator, fines collection device and wet magnetic separation device, the high pressure roller surge bunker is ore inlet, the high pressure
The mechanical sifter is delivered in the discharging opening Jing conveyer devices connection of roller, and the Sieving and casing of the mechanical sifter is 3mm,
The oversize outlet Jing conveyer devices of the mechanical sifter are connected to the high pressure roller surge bunker, the mechanical sifter
Siftage outlet Jing conveyer devices be connected to dry-type magnetic extractor, the rough concentrate outlet Jing conveyer devices of dry-type magnetic extractor are connected to
The wind-force powder concentrator, the coarse powder outlet Jing conveyer devices of wind-force powder concentrator are connected to the high pressure roller surge bunker, winnowing powder
The fine powder outlet Jing fines collections device of machine and conveyer device are connected to dry-type magnetic extractor, the thin magnetic ore deposit outlet Jing of dry-type magnetic extractor
Conveyer device is connected to the wet magnetic separation device.
Alternatively, the mechanical sifter is linear vibrating screen.
Alternatively, the fines collection device is bag collector.
Aforementioned main formula case of the present invention and its each further selection scheme can be this with independent assortment to form multiple schemes
Invention can be adopted and claimed scheme：It is such as of the invention, it is each to select to select combination in any, people in the art with other
Member can understand there is multiple combination according to prior art and common knowledge after the present invention program is understood, and be claimed by the present invention
Technical scheme, here do not do exhaustion.
Beneficial effects of the present invention：The present invention adopts grinding process of the high pressure roller mill complete independently to iron ore, by Ore
Crushing and grinding and magnetic separation it is reasonably combined, the dry separation stage improve as far as possible iron mine taste, reduce the throwing of wet magnetic separation
Tail amount, water consumption are greatly lowered, and significantly reducing for wet mine tailing amount can be with which so that processing cost is accordingly reduced, economic benefit
Significantly improve.The grading of Ore is divided into and roughly selects and carefully select two parts, select powder using machinery according to iron mine characteristic by the present invention
Combine with winnowing powder and complete the particle size separation process of breeze, roughly select and adopt mechanical grading, the power consumption for greatling save, carefully
Choosing adopts air classification, solves the problems, such as that current dry-type mechanical screen size can not be too small.
The present invention solves magnetic iron ore and sorts bigger than normal in dry magnetic separation stage granularity, and dry magnetic separation efficiency is low, concentrate product
Position lifting amplitude is little, and iron mine grade is lifted at the excessive problem of accounting in the big wet magnetic separation of water requirement；Solve traditional iron mine
Stone fine grinding adopts ball milling wet grinding, and steel consumption is high, power consumption is high, the problem that water requirement is big and treating capacity is little.
The present invention adopts above-mentioned original creation Technology, will be the crushing and grinding of Ore and magnetic separation reasonably combined, reduces ore dressing
During wet magnetic separation proportion, the disintegrating machine and tube mill of hinge structure（Fine grinding adopts wet ball-milling）Technique, can
Improve full iron recovery about 10%, it is possible to decrease system power consumption about 20%, reduce system steel consumption 50%, reduce system water consume 75%, improve
Economic benefit, alleviates environmental pollution.
Description of the drawings
Fig. 1 is the device flow chart of the embodiment of the present invention；
Wherein 1 is surge bunker, 2 is high pressure roller, 3 is linear vibrating screen, 4 is dry-type magnetic extractor, 5 is wind-force powder concentrator, 6 are
Bag collector, 7 be exhaust gas fan, 8 be wet magnetic separation device.
Specific embodiment
Following non-limiting examples are used to illustrate the present invention.
With reference to shown in Fig. 1, after crushing-magnetic selection<The Ore direct transdermal band of 80mm delivers to high pressure roller surge bunker 1, or,
It is in small, broken bits extremely<High pressure roller surge bunker 1 is re-fed into after 30mm, Ore first returns material with coarse grain and mixes in surge bunker, through high pressure roller 2
After extruding, linear vibrating screen 3 is delivered to by belt and is screened, Sieving and casing is 3mm, oversize（>3mm）Percutaneous band is delivered to high pressure roller and is delayed
Rush storehouse 1 and continue extruding.3 siftage of linear vibrating screen（<3mm）Sort into dry-type magnetic extractor 4, barren rock percutaneous band delivers to hillock
, rough concentrate percutaneous band machine, elevator are delivered to wind-force powder concentrator 5 and are classified, coarse powder after classification（<3mm）Percutaneous band sends high pressure roller back to
Surge bunker 1 continues extruding, fine powder（Reach Iron concentrate fineness requirement）Jing after bag collector 6 is collected, percutaneous band machine is delivered to dry
Formula magnetic separator 4 is sorted, and mine tailing percutaneous band delivers to barren rock stockyard, thin magnetic ore deposit（Reach Iron concentrate fineness requirement）Deliver to follow-up workshop wet
Formula concentration equipment 8 is carried out.Powder concentrator air path system is completed by the exhaust gas fan 7 after wind-force powder concentrator 5 and bag collector 6, natural
Wind is introduced in wind-force powder concentrator 5, and the dust-laden wind after wind-force powder concentrator 5 is separated enters bag collector 6, the cleaning after gathering dust
Gas discharging.Dry separation dry grinding workshop each point gathers dust and is completed by dust-precipitator.
Presently preferred embodiments of the present invention is the foregoing is only, not to limit the present invention, all essences in the present invention
Any modification, equivalent and improvement made within god and principle etc., should be included within the scope of the present invention.
Claims (8)
1. a kind of magnetic iron ore is dry grinded dry dressing method, it is characterised in that：In it is broken after<The Ore of 80mm returns material with coarse grain and mixes, Jing
After crossing high pressure roller extruding, mechanical grading is delivered to, Sieving and casing is 3mm, and oversize is returned as the coarse grain expects to return high pressure roller
Continue extruding, siftage is sorted into dry-type magnetic extractor, the rough concentrate of dry-type magnetic extractor sorting delivers to the classification of wind-force powder concentrator, wind
Coarse powder after the classification of power powder concentrator also serves as the coarse grain and returns material return high pressure roller continuation extruding, reaches after the classification of wind-force powder concentrator
To after the fines collection of Iron concentrate fineness requirement, dry-type magnetic extractor sorting is delivered to, Iron concentrate is reached after dry-type magnetic extractor sorting thin
The thin magnetic ore deposit that degree is required finally carries out wet magnetic separation；The fine powder of the Iron concentrate fineness requirement/thin magnetic ore deposit refers to that 200 mesh sieves pass through
50-70%。
2. magnetic iron ore as claimed in claim 1 is dry grinded dry dressing method, it is characterised in that：In it is broken after Ore further it is in small, broken bits extremely
<After 30mm, material is returned with coarse grain and mixed, extruded into high pressure roller.
3. magnetic iron ore as claimed in claim 1 is dry grinded dry dressing method, it is characterised in that：The mechanical grading is straight-line oscillation
Sieve.
4. magnetic iron ore as claimed in claim 1 is dry grinded dry dressing method, it is characterised in that：Reach after the wind-force powder concentrator classification
The fine powder of Iron concentrate fineness requirement is collected by bag collector.
5. magnetic iron ore as claimed in claim 4 is dry grinded dry dressing method, it is characterised in that：The air path system of the wind-force powder concentrator
Completed by wind-force powder concentrator and the exhaust gas fan after bag collector, natural wind is introduced in wind-force powder concentrator, by powder concentrator point
Dust-laden wind after enters bag collector, arranges outside the clean gas after gathering dust.
6. a kind of magnetic iron ore for described in any claim in claim 1 to 5 is dry grinded the device of dry dressing method, its feature
It is：Fill including high pressure roller, dry-type magnetic extractor, mechanical sifter, wind-force powder concentrator, fines collection device and wet magnetic separation
Put, the high pressure roller surge bunker is ore inlet, the discharging opening Jing conveyer devices of the high pressure roller connect delivers to the mechanical picker
Separating device, the Sieving and casing of the mechanical sifter is 3mm, the oversize outlet Jing conveyer devices of the mechanical sifter
The high pressure roller surge bunker is connected to, the siftage outlet Jing conveyer devices of the mechanical sifter are connected to dry type magnetic separation
Machine, the rough concentrate outlet Jing conveyer devices of dry-type magnetic extractor are connected to the wind-force powder concentrator, the coarse powder outlet of wind-force powder concentrator
Jing conveyer devices are connected to the high pressure roller surge bunker, the fine powder outlet Jing fines collections device of wind-force powder concentrator and conveyer device
Dry-type magnetic extractor is connected to, the thin magnetic ore deposit outlet Jing conveyer devices of dry-type magnetic extractor are connected to the wet magnetic separation device.
7. magnetic iron ore as claimed in claim 6 is dry grinded dry separation device, it is characterised in that：The mechanical sifter shakes for straight line
Dynamic sieve.
8. magnetic iron ore as claimed in claim 6 is dry grinded dry separation device, it is characterised in that：The fines collection device gathers dust for bag
Device.
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| CN201510237394.7A CN104815739B (en) | 2015-05-11 | 2015-05-11 | Magnetite dry grinding and dry separation method and device |
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| CN201510237394.7A CN104815739B (en) | 2015-05-11 | 2015-05-11 | Magnetite dry grinding and dry separation method and device |
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| CN104815739B true CN104815739B (en) | 2017-04-26 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105413842B (en) * | 2015-12-16 | 2016-11-16 | 中冶沈勘秦皇岛工程技术有限公司 | The ore-dressing technique of Ultra-low-grade magnetite and system |
| CN106111318B (en) * | 2016-07-05 | 2017-10-03 | 河南理工大学 | A kind of strongly magnetic mineral is classified fluidization weak magnetic screening device |
| CN106622619A (en) * | 2016-11-28 | 2017-05-10 | 攀枝花市仁通钒业有限公司 | Grinder |
| CN106938219A (en) * | 2017-04-27 | 2017-07-11 | 酒泉钢铁(集团)有限责任公司 | A kind of beneficiation method of extreme poverty sand iron ore |
| CN107159429A (en) * | 2017-07-11 | 2017-09-15 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of hermetically sealed dry grinding dry separation craft of iron ore |
| CN107661814B (en) * | 2017-10-31 | 2023-08-22 | 中冶北方（大连）工程技术有限公司 | Screening-magnetic separation-ore grinding-magnetic separation flow equipment arrangement system |
| CN108380380A (en) * | 2018-03-29 | 2018-08-10 | 安徽马钢张庄矿业有限责任公司 | Product dry type fine crushing sorts Iron concentrate technique |
| CN109569836B (en) * | 2018-10-28 | 2021-09-03 | 山东天发永磁磁电科技有限公司 | Dry method iron-removing impurity-removing purification process and system for potash feldspar ore and albite |
| CN113260724A (en) * | 2018-11-14 | 2021-08-13 | 铁桥运营私人有限公司 | Method and apparatus for processing magnetite |
| AU2019387713A1 (en) * | 2018-11-27 | 2020-09-17 | Fortescue Metals Group Ltd | Apparatus and method for processing iron ore |
| CN110180664A (en) * | 2019-07-03 | 2019-08-30 | 北京坚构创新科技有限公司 | Half final grinding system of one kind and method |
| CN114260095B (en) * | 2021-12-22 | 2024-02-02 | 安徽大昌矿业集团有限公司 | Ore dressing method and device for preparing ultra-pure iron concentrate from magnetite concentrate |
| CN114618634B (en) * | 2022-03-28 | 2023-09-22 | 胡沿东 | Dry grinding and dry separation process of ore |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101502819B (en) * | 2009-03-25 | 2010-11-24 | 中钢集团马鞍山矿山研究院有限公司 | Pre-selection method of low-ore grade magnetic iron ore |
| CN102240588B (en) * | 2011-05-19 | 2013-12-18 | 成都利君实业股份有限公司 | Dry-grinding and dry-separation method of magnetite |
| JP2013086091A (en) * | 2011-10-14 | 2013-05-13 | Yahata:Kk | Advanced recycling system for construction waste applying wet type washing, crushing and sorting technology |
| CN102600923B (en) * | 2012-03-12 | 2014-05-14 | 成都利君实业股份有限公司 | Magnetite finish grinding system and grinding method thereof |
| CN202655097U (en) * | 2012-06-26 | 2013-01-09 | 成都利君科技有限责任公司 | Iron mine dry method fine grinding system |
| CN102728445A (en) * | 2012-06-26 | 2012-10-17 | 成都利君科技有限责任公司 | Method for fine grinding of iron ore by dry method |
| CN103736663B (en) * | 2014-01-23 | 2017-10-13 | 陕西三沅重工发展股份有限公司 | A kind of Magnetite beneficiation method |
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