CN102600923A - Magnetite finish grinding system and grinding method thereof - Google Patents

Magnetite finish grinding system and grinding method thereof Download PDF

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Publication number
CN102600923A
CN102600923A CN2012100623817A CN201210062381A CN102600923A CN 102600923 A CN102600923 A CN 102600923A CN 2012100623817 A CN2012100623817 A CN 2012100623817A CN 201210062381 A CN201210062381 A CN 201210062381A CN 102600923 A CN102600923 A CN 102600923A
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China
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outlet
fine
grinding
bucket elevator
iron ore
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CN2012100623817A
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Chinese (zh)
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CN102600923B (en
Inventor
何亚民
魏勇
徐智平
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成都利君实业股份有限公司
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Abstract

The invention discloses a magnetite finish grinding system and a grinding method thereof. An outlet of a steady-flow constant-weight bin is connected with a high-pressure roller mill, one end of a second bucket elevator is arranged below the high-pressure roller mill, a multi-stage air powder concentrator is arranged at the other end of the second bucket elevator, a second belt conveyor is arranged below a coarse grain outlet of the multi-stage air powder concentrator and connected with a first bucket elevator, a second boiling type magnetic concentrator is arranged below a fine grain outlet of the multi-stage air powder concentrator, a fine concentrate outlet of the second boiling type magnetic concentrator is connected with a third belt conveyor, the third belt conveyor is connected with the first bucket elevator, the first bucket elevator is connected with an inlet of the steady-flow constant-weight bin, a fine powder outlet of the multi-stage air powder concentrator is connected with an inlet of a cyclone type dust collector, an outlet of the cyclone type dust collector is connected with a bag collector, another outlet of the cyclone type dust collector is connected with the first belt conveyor, and the first belt conveyor is connected with a first boiling type magnetic concentrator. The magnetite finish grinding system and the grinding method can be used for obtaining high-grade powdered iron, and are short in process, low in production cost, high in efficiency and fine in recovery effect.

Description

A kind of magnetic iron ore final grinding system and grinding method thereof
Technical field
The present invention relates to a kind of magnetic iron ore final grinding system and grinding method thereof, relate in particular in the industries such as metallurgy, mine, belong to magnetic iron ore grinding technical field in metallurgical, the mine the magnetic iron ore final grinding system and the grinding method thereof of the magnetic separation of mineral grinding.
Background technology
In the ore dressing field of industries such as metallurgy, mine; Need carry out grinding and magnetic separation to magnetic material such as iron ore; Studying now roll-in grinding technology and dry type magnetic separation technology in the industry energetically, particularly the research of roll squeezer and magnetic separator has obtained certain effect, still as the grinding magnetic separation system of magnetic iron ore; In actual use formula, still exist system not to be sufficiently complete and/or sort problems such as rate is not high.As:
One Chinese patent application number is 201110130407.2; The applying date is on 05 19th, 2011, and publication number is CN102240588A, and name is called the Chinese invention patent of " a kind of magnetic iron ore dry grinding dry dressing method "; This disclosure of the Invention a kind of method: the magnetic iron ore tcrude ore is sent into the disintegrating machine coarse crushing; Send into bolting after the fragmentation, oversize send in the disintegrating machine broken after, send into high-pressure roller mill with screenings and carry out in small, broken bits; Ore after in small, broken bits through break up grader break up with classification after, obtain the product of coarse grain, particulate, three grades of fine powder; The coarse fraction product returns high-pressure roller mill, and the fine fraction product is sent into the dry-type magnetic extractor magnetic separation, and fine tailings is directly done heap, and fine concentrate returns high-pressure roller mill and forms closed circuitly, and fine powder level product is sent into the whirlwind magnetic separator, obtains concentrate or half concentrate.Its dry-type magnetic extractor or whirlwind magnetic separator treating capacity and efficient are all relatively poor, and bagroom can only reclaim superfine powder, and its recovering effect is not good, efficient is low.
One Chinese patent application number is 201110002018.1; The applying date is on 01 07th, 2011; Publication number is CN102179272A; Name is called the Chinese invention patent of " slag, slag micropowder production line final grinding system of roll squeezer ", and the disclosed technical scheme of this patent is: first bucket elevator is to the current stabilization storehouse feeding of weighing, and the product of roll squeezer is scattering and grading in the V-type powder concentrator; The quick fluidized bed furnace of high temperature is connected with the air inlet of V-type powder concentrator; Between V-type powder concentrator and ultra-fine seperator, be provided with oven dry pipe and rotoclone collector; The air inlet of the air outlet series connection oven dry Guan Houyu rotoclone collector of V-type powder concentrator connects; The air outlet of rotoclone collector is connected with the air inlet of ultra-fine seperator through pipeline, below rotoclone collector and ultra-fine seperator, is provided with chute, and the least significant end of chute is positioned at the top of the second bucket elevator feed hopper.This system can not carry out the grade classification, and selected slag, slag can not be upgrade.
Summary of the invention
The objective of the invention is to: a kind of magnetic iron ore final grinding system and grinding method thereof are provided; Solve in the existing grinding system; The system throughput that exists and efficient is relatively poor, recovering effect is not good, can not carry out the grade classification; Selected slag, slag can not reach the technical problem of required grade and output requirement, thereby can effectively solve the problem that exists in the above-mentioned prior art.
The objective of the invention is to realize: a kind of magnetic iron ore final grinding system through following technical proposals; Comprise current stabilization constant weight storehouse, high-pressure roller mill, bucket elevator, No. two bucket elevators, multi-staged air powder concentrator, belt feeder, piling tails, concentrate mouth, No. two belt feeders, No. three belt feeders, whirlwind cartridge type dust-precipitator, bagroom, a boiling type magnetic separator and No. two boiling type magnetic separators; The outlet in said current stabilization constant weight storehouse connects high-pressure roller mill; The below of said high-pressure roller mill is an end of No. two bucket elevators, and the other end of No. two bucket elevators is the multi-staged air powder concentrator; The coarse grain outlet below of said multi-staged air powder concentrator is No. two belt feeders; No. two belt feeders and a bucket elevator join; The particulate outlet below of said multi-staged air powder concentrator is established the boiling type magnetic separator No. two; The fine concentrate outlet of No. two boiling type magnetic separators is joined with No. three belt feeders, and No. three belt feeders and a bucket elevator join, and the inlet in a said bucket elevator and current stabilization constant weight storehouse joins; The fine powder outlet of said multi-staged air powder concentrator is joined with the inlet of whirlwind cartridge type dust-precipitator; One outlet and the bagroom of whirlwind cartridge type dust-precipitator join; Another outlet connects belt feeder No. one; A belt feeder and a boiling type magnetic separator join, and No. one the boiling type magnetic separator is provided with fine powder concentrate mouth.
As a kind of optimal way, be provided with blower fan at said whirlwind cartridge type dust-precipitator and multi-staged air powder concentrator place.
As further optimal way, the fine tailings of said No. two boiling type magnetic separators goes out No. two piling tails of interruption-forming.
As further optimal way, the fine tailings of a said boiling type magnetic separator goes out piling tails of interruption-forming.
The whole grinding method of a kind of magnetic iron ore comprises the steps:
The first step: the mineral after will slightly breaking are sent in the current stabilization constant weight storehouse, flow into and carry out roll-in in the high-pressure roller mill;
Second step: the material after the roll-in through No. two bucket elevators send into break up in the multi-staged air powder concentrator with classification after obtain coarse grain, particulate, No. two particulates and fine powder;
Coarse grain gets into current stabilization constant weight storehouse once more after No. two belt feeders transfer to a bucket elevator;
A particulate and No. two boiling type magnetic separators of No. two particulates merging back entering carry out magnetic separation and throw tail, and the fine tailings behind the throwing tail forms No. two piling tails, and the fine concentrate behind the throwing tail transfers to bucket elevator No. one through No. three belt feeders, gets into current stabilization constant weight storehouse once more;
The 3rd step: fine powder gets into bagroom and reclaims behind whirlwind cartridge type dust-precipitator, and the recovery back gets into a boiling type magnetic separator carries out magnetic separation and throw tail, and the fine powder mine tailing behind the throwing tail forms a piling tails, and the fine powder concentrate flows out from the concentrate mouth.
As a kind of optimal way, in the first step, the inlet amount that the mineral after thick the breaking get in the current stabilization constant weight storehouse is 300t/h~800t/h, and the treating capacity of carrying out roll-in in the high-pressure roller mill is 800t/h~2000t/h.
As a kind of optimal way, in second step, coarse grain transfers to bucket elevator with the amount of 300t/h~1500t/h No. one through No. two belt feeders; A particulate and No. two particulates merge back No. two boiling type magnetic separators of amount entering with 100t/h~600t/h.
As a kind of optimal way, the 3rd step: powder particle size be-0.2mm~0.025mm, amount are that the fine powder of 200t/h~600t/h is through whirlwind cartridge type dust-precipitator.
Compared with prior art; Beneficial effect of the present invention: the magnetic iron ore after magnetic iron ore final grinding system of the present invention and grinding method thereof can will slightly break carries out grade classification selection and magnetic separation after the high-pressure roller mill roll-in; Obtain the smart powder of the higher iron of grade; This system flow is short, production cost is low, floor space is little, steel consumption and power consumption is little, not consume water, treating capacity is big, efficient is high, recovering effect is good; Magnetic iron ore is once through just reaching required grade and output requirement behind the native system, therefore, native system is a kind of energy-conservation, efficient, free of contamination magnetic iron ore final grinding system and grinding method thereof.
Description of drawings
Fig. 1 is the structural representation of magnetic iron ore final grinding system of the present invention.
The specific embodiment
Below in conjunction with specific embodiment and accompanying drawing the present invention is further described.
Disclosed all characteristics in this specification, or the step in disclosed all methods or the process are except the speciality of mutual repulsion and/or the step; All can make up by any way; Only if special narration all can be replaced by other equivalences or the alternative features with similar purpose, promptly; Only if special narration, an embodiment in a series of equivalences of each characteristic or the similar characteristics.
As shown in Figure 1; Magnetic iron ore final grinding system of the present invention and grinding method thereof comprise current stabilization constant weight storehouse 1, high-pressure roller mill 2, bucket elevator 3, No. two bucket elevators 4, multi-staged air powder concentrator 5, belt feeder 9, piling tails 11, concentrate mouth 12, No. two belt feeders 14, No. two piling tails 15 and No. three belt feeders 16; It is characterized in that: also comprise whirlwind cartridge type dust-precipitator 6, bagroom 8, a boiling type magnetic separator 10 and No. two boiling type magnetic separators 13; The outlet in said current stabilization constant weight storehouse 1 connects high-pressure roller mill 2; The below of said high-pressure roller mill 2 is an end of No. two bucket elevators 4, and the other end of No. two bucket elevators 4 is a multi-staged air powder concentrator 5.The coarse grain outlet below of said multi-staged air powder concentrator 5 is No. two belt feeders 14; No. two belt feeders 14 and a bucket elevator 3 join; The particulate outlet below of said multi-staged air powder concentrator 5 is established boiling type magnetic separator 13 No. two; The fine tailings of said No. two boiling type magnetic separators 13 goes out No. two piling tails 15 of interruption-forming; The fine concentrate outlet of No. two boiling type magnetic separators 13 is joined with No. three belt feeders 16, and No. three belt feeders 16 and a bucket elevator 3 join, and a said bucket elevator 3 joins with the inlet in current stabilization constant weight storehouse 1; The fine powder outlet of said multi-staged air powder concentrator 5 is joined with the inlet of whirlwind cartridge type dust-precipitator 6, is provided with blower fan 7 at said whirlwind cartridge type dust-precipitator 6 with multi-staged air powder concentrator 5 places.One outlet of whirlwind cartridge type dust-precipitator 6 is joined with bagroom 8; Another outlet connects belt feeder 9 No. one; A belt feeder 9 and a boiling type magnetic separator 10 join; No. one boiling type magnetic separator 10 is provided with fine powder concentrate mouth 12, and the fine tailings of a said boiling type magnetic separator 10 goes out piling tails 11 of interruption-forming.
The whole grinding method of magnetic iron ore of the present invention comprises the steps:
The first step: granularity is that the mineral of 0~75mm are admitted in the current stabilization constant weight storehouse 1 after thick broken, flows into and carries out roll-in in the high-pressure roller mill 2;
Second step: the material after the roll-in through No. two bucket elevators 4 send into break up in the multi-staged air powder concentrator 5 with classification after obtain the 3mm coarse grain ,-particulate of 3mm~0.2mm ,-No. two particulates of 3mm~0.2mm and the < product of four grades of 0.2mm fine powder;
Coarse grain gets into current stabilization constant weight storehouse 1 once more after No. two belt feeders 14 transfer to a bucket elevator 3; A particulate and No. two particulates merge back No. two boiling type magnetic separators 13 of entering to carry out magnetic separation and throws tail; Fine tailings behind the throwing tail forms No. two piling tails 15; Fine concentrate behind the throwing tail transfers to bucket elevator 3 No. one through No. three belt feeders 6; Get into once more in current stabilization constant weight storehouse 1 and the high-pressure roller mill 2, form circulation;
The 3rd step: fine powder gets into bagroom 8 and reclaims behind whirlwind cartridge type dust-precipitator 6; Reclaiming back boiling type magnetic separator 10 of entering carries out magnetic separation and throws tail; Fine powder mine tailing behind the throwing tail forms a piling tails 11; The fine powder concentrate flows out from concentrate mouth 12, and the fine powder concentrate grade is from bringing up to below 20% more than 55%, and the fine powder concentrate flows out through concentrate mouth 12 and forms product or get into next process.
Embodiment 1:
The poor magnetic iron ore in somewhere, Shanxi, raw ore all iron content 11.5%, Armco magnetic iron content 6.8%,
Granularity is that the mineral of 0~75mm are admitted in the current stabilization constant weight storehouse after thick broken; Inlet amount is that 500t/h flows into high-pressure roller mill again and carries out roll-in; The high-pressure roller mill treating capacity is 1500t/h; Material after the roll-in by No. two bucket elevators send into the multi-staged air powder concentrator break up with classification after, obtain>the 3mm coarse grain ,-particulate of 3mm~0.2mm and-No. two particulates of 3mm~0.2mm, < product of four grades of 0.2mm fine powder; The amount of coarse fraction product is that 1200t/h returns high-pressure roller mill through No. two belt feeders and a bucket elevator, forms circulation; Particulate and No. two particulate two-step product merging amounts are that 400t/h sends into No. two boiling type magnetic separators and carries out magnetic separation and throw tail; The fine tailings amount of throwing tail is that 200t/h directly does heap and forms No. two piling tails, and to be 200t/h return high-pressure roller mill through No. three belt feeders and a bucket elevator to the fine concentrate amount forms closed circuit; Fine powder level product granularity is-0.2mm~0.025mm amount reclaims through whirlwind cartridge type dust-precipitator for 400t/h; Fine powder level product granularity reclaims through bagroom for 100t/h for-0.025mm amount; Sending into a boiling type magnetic separator through a belt feeder after two kinds of fine powders merge carries out magnetic separation and throws tail; The fine powder mine tailing amount of throwing tail is that 400t/h directly does piling tails of heap formation; The fine powder concentrate grade is from bringing up to below 20% more than 55%, and fine powder concentrate amount is that 300t/h flows out the formation product or gets into next process through the concentrate mouth.Blower fan is that whirlwind cartridge type dust-precipitator and multi-staged air powder concentrator provide wind-force.
Magnetic iron ore final grinding system of the present invention and grinding method thereof adopt high-pressure roller mill, multistage wind-force powder concentrator and boiling type magnetic separation to get the machine magnetic separation; With material from-75mm; The choosing of broken limit, limit to-0.5mm even-below the 0.2mm, grade is suitable for the production of the magnetic iron ore in drought and water shortage area from bringing up to below 20% more than 55%; Because the feed preparation unit size of high-pressure roller mill is bigger, so crushing circuit is simplified greatly; The dry type mine tailing that production obtains can be used as building sand, need not build the mine tailing storehouse, has saved substantial contribution, has practiced thrift land resource.
Flow process of the present invention is short, and production cost is low, and floor space is little, and steel consumption, power consumption are little, consume water not, and recovering effect is good, is a kind of energy-conservation, efficient, free of contamination magnetic iron ore final grinding system and grinding method thereof.
Embodiment 2:
The poor magnetic iron ore in somewhere, Xinjiang, raw ore all iron content 18.6%, Armco magnetic iron content 15.3%
Granularity is that the mineral of 0~75mm are admitted in the current stabilization constant weight storehouse after thick broken; Inlet amount is that 700t/h flows into high-pressure roller mill again and carries out roll-in; The high-pressure roller mill treating capacity is 1200t/h; Material after the roll-in by No. two bucket elevators send into the multi-staged air powder concentrator break up with classification after, obtain>the 3mm coarse grain ,-particulate of 3mm~0.2mm and-No. two particulates of 3mm~0.2mm, < product of four grades of 0.2mm fine powder; The amount of coarse fraction product is that 1400t/h returns high-pressure roller mill through No. two belt feeders and a bucket elevator, forms circulation; Particulate and No. two particulate two-step product merging amounts are that 350t/h sends into No. two boiling type magnetic separators and carries out magnetic separation and throw tail; The fine tailings amount of throwing tail is that 450t/h directly does heap and forms No. two piling tails, and to be 450t/h return high-pressure roller mill through No. three belt feeders and a bucket elevator to the fine concentrate amount forms closed circuit; Fine powder level product granularity is-0.2mm~0.025mm amount reclaims through whirlwind cartridge type dust-precipitator for 350t/h; Fine powder level product granularity reclaims through bagroom for 150t/h for-0.025mm amount; Sending into a boiling type magnetic separator through a belt feeder after two kinds of fine powders merge carries out magnetic separation and throws tail; The fine powder mine tailing amount of throwing tail is that 400t/h directly does piling tails of heap formation; The fine powder concentrate grade is from bringing up to below 20% more than 55%, and fine powder concentrate amount is that 400t/h flows out the formation product or gets into next process through the concentrate mouth.Blower fan is that whirlwind cartridge type dust-precipitator and multi-staged air powder concentrator provide wind-force.
A kind of magnetic iron ore final grinding system of the present invention and grinding method thereof adopt high-pressure roller mill, multistage wind-force powder concentrator and boiling type magnetic separation to get the machine magnetic separation; With material from-75mm; The choosing of broken limit, limit to-0.5mm even-below the 0.2mm, grade is suitable for the production of the magnetic iron ore in drought and water shortage area from bringing up to below 20% more than 55%; Because the feed preparation unit size of high-pressure roller mill is bigger, so crushing circuit is simplified greatly; The dry type mine tailing that production obtains can be used as building sand, need not build the mine tailing storehouse, has saved substantial contribution, has practiced thrift land resource.
Flow process of the present invention is short, and production cost is low, and floor space is little, and steel consumption, power consumption are little, consume water not, and recovering effect is good, is a kind of energy-conservation, efficient, free of contamination magnetic iron ore final grinding system and grinding method thereof.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (8)

1. magnetic iron ore final grinding system; Comprise current stabilization constant weight storehouse, high-pressure roller mill, bucket elevator, No. two bucket elevators, multi-staged air powder concentrator, belt feeder, concentrate mouth, No. two belt feeders and No. three belt feeders; It is characterized in that: also comprise whirlwind cartridge type dust-precipitator, bagroom, a boiling type magnetic separator and No. two boiling type magnetic separators; The outlet in said current stabilization constant weight storehouse connects high-pressure roller mill; The below of said high-pressure roller mill is an end of No. two bucket elevators, and the other end of No. two bucket elevators is the multi-staged air powder concentrator; The coarse grain outlet below of said multi-staged air powder concentrator is No. two belt feeders; No. two belt feeders and a bucket elevator join; The particulate outlet below of said multi-staged air powder concentrator is established the boiling type magnetic separator No. two; The fine concentrate outlet of No. two boiling type magnetic separators is joined with No. three belt feeders, and No. three belt feeders and a bucket elevator join, and the inlet in a said bucket elevator and current stabilization constant weight storehouse joins; The fine powder outlet of said multi-staged air powder concentrator is joined with the inlet of whirlwind cartridge type dust-precipitator; One outlet and the bagroom of whirlwind cartridge type dust-precipitator join; Another outlet connects belt feeder No. one; A belt feeder and a boiling type magnetic separator join, and No. one the boiling type magnetic separator is provided with fine powder concentrate mouth.
2. magnetic iron ore final grinding system as claimed in claim 1 is characterized in that: be provided with blower fan at said whirlwind cartridge type dust-precipitator and multi-staged air powder concentrator place.
3. magnetic iron ore final grinding system as claimed in claim 2 is characterized in that: the fine tailings of said No. two boiling type magnetic separators goes out No. two piling tails of interruption-forming.
4. magnetic iron ore final grinding system as claimed in claim 2 is characterized in that: the fine tailings of a said boiling type magnetic separator goes out piling tails of interruption-forming.
5. the whole grinding method of magnetic iron ore as claimed in claim 1 is characterized in that: comprise the steps:
The first step:
Mineral after slightly breaking are sent in the current stabilization constant weight storehouse, flowed into again and carry out roll-in in the high-pressure roller mill;
Second step: the material after the roll-in through No. two bucket elevators send into break up in the multi-staged air powder concentrator with classification after obtain coarse grain, particulate, No. two particulates and fine powder;
Coarse grain gets into current stabilization constant weight storehouse once more after No. two belt feeders transfer to a bucket elevator;
A particulate and No. two boiling type magnetic separators of No. two particulates merging back entering carry out magnetic separation and throw tail, and the fine tailings behind the throwing tail forms No. two piling tails, and the fine concentrate behind the throwing tail transfers to bucket elevator No. one through No. three belt feeders, gets into current stabilization constant weight storehouse once more;
The 3rd step: fine powder gets into bagroom and reclaims behind whirlwind cartridge type dust-precipitator, and the recovery back gets into a boiling type magnetic separator carries out magnetic separation and throw tail, and the fine powder mine tailing behind the throwing tail forms a piling tails, and the fine powder concentrate flows out from the concentrate mouth.
6. the whole grinding method of magnetic iron ore as claimed in claim 5 is characterized in that: in the first step, the inlet amount that the mineral after thick the breaking get in the current stabilization constant weight storehouse is 300t/h~800t/h, and the treating capacity of carrying out roll-in in the high-pressure roller mill is 800t/h~2000t/h.
7. the whole grinding method of magnetic iron ore as claimed in claim 5 is characterized in that: in second step, coarse grain transfers to bucket elevator with the amount of 300t/h~1500t/h No. one through No. two belt feeders; A particulate and No. two particulates merge back No. two boiling type magnetic separators of amount entering with 100t/h~600t/h.
8. the whole grinding method of magnetic iron ore as claimed in claim 5 is characterized in that: the 3rd step: powder particle size for-0.2mm~0.025mm, amount for the fine powder of 200t/h~600t/h through whirlwind cartridge type dust-precipitator.
CN201210062381.7A 2012-03-12 2012-03-12 Magnetite finish grinding system and grinding method thereof CN102600923B (en)

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CN105435938A (en) * 2015-12-31 2016-03-30 溧阳中材重型机器有限公司 Cement combined grinding system
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CN104772212A (en) * 2015-02-15 2015-07-15 胡沿东 Separation system
WO2016127899A1 (en) * 2015-02-15 2016-08-18 胡沿东 Ore dressing system
WO2016127864A1 (en) * 2015-02-15 2016-08-18 胡沿东 Ore grinding system
WO2016127900A1 (en) * 2015-02-15 2016-08-18 胡沿东 Ore dressing system
WO2016127870A1 (en) * 2015-02-15 2016-08-18 胡沿东 Ore sorting system
CN104815739A (en) * 2015-05-11 2015-08-05 成都建筑材料工业设计研究院有限公司 Magnetite dry grinding and dry separation method and device
CN105435938A (en) * 2015-12-31 2016-03-30 溧阳中材重型机器有限公司 Cement combined grinding system
CN105435938B (en) * 2015-12-31 2018-04-27 溧阳中材重型机器有限公司 A kind of cement Joint grinding system
CN111167589A (en) * 2020-01-10 2020-05-19 湘潭玉峰新材料科技有限公司 Dry sand making process

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