CN105797847B - A kind of iron ore synthesis dry tail ore dressing throws the method except ferromagnetism mine tailing - Google Patents
A kind of iron ore synthesis dry tail ore dressing throws the method except ferromagnetism mine tailing Download PDFInfo
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- CN105797847B CN105797847B CN201610150162.2A CN201610150162A CN105797847B CN 105797847 B CN105797847 B CN 105797847B CN 201610150162 A CN201610150162 A CN 201610150162A CN 105797847 B CN105797847 B CN 105797847B
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- mine tailing
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- tailing
- magnetic separation
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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
- B03C1/30—Combinations with other devices, not otherwise provided for
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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
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Abstract
The method except ferromagnetism mine tailing is thrown the present invention relates to a kind of iron ore synthesis dry tail ore dressing, for iron ore integrate mine tailing in containing ferromagnetism mine tailing, weak magnetic mine tailing, flotation tailing situation, according to strong magnetic tail ore deposit magnetic is relatively low, grade is higher, roasting, magnetic separation recovery iron resource can be passed through；Weakly magnetic tailingses magnetic is higher, grade is relatively low, and flotation tailing magnetic is higher, granularity is relatively thin, grade and content of sulfur dioxide are higher, and both mine tailings can not be recycled due to content of sulfur dioxide height.For iron-containing resource in the comprehensive mine tailing of fully recovery, tailings processing method is：The relatively low synthesis mine tailing of water content is after caking beater is broken up, powdery synthesis mine tailing carries out dry type magnetic separation using double helix magnetic separator again, the ferrous material that magnetic is relatively low in mine tailing, grade is higher is set to be separated with other mineral, obtain the higher weak magnetic mine tailing of grade, after fired magnetic separation, the iron ore concentrate of grade more than 54% is can obtain, obtained magnetic tailing can be used as construction material or packing material to be utilized.
Description
Technical field
The invention belongs to the solid waste utilization of resources and technical field of mineral processing, and in particular to a kind of iron ore integrates tailing dry
The method except ferromagnetism mine tailing is thrown in choosing.
Background technology
Mineral resources are basis and the guarantee of the national economic development, and in human survival and social development activity very
Important part.With China's expanding economy, a large amount of iron ore deposits of demand, but with the utilization of mineral resources,
Easily select mineral resources more and more shorter, and contain a large amount of iron ore deposits in iron ore tailings, select iron to have cost low from mine tailing
The characteristics of.
Iron ore tailings are that raw iron ores or magnetizing roast mineral sort essence of tapping a blast furnace by broken, ore grinding and magnetic separation processing
The general name of leftover materials after ore deposit, iron ore, which is integrated in mine tailing, high intensity magnetic separation mine tailing, low intensity magnetic separation mine tailing and flotation tailing, high intensity magnetic separation tail
Ore deposit is to carry out the product after magnetic separation using 20000 Oe high field intensity after ore grinding, and low intensity magnetic separation mine tailing is to use 1250 Oe after ore grinding
Field strength carry out magnetic separation after product, flotation tailing be to magnetic tailing carry out flotation after product.Essential mineral group in mine tailing
Into being gangue（Such as quartz, pyroxene, feldspar, garnet, hornblend and its altered mineral）And ferriferous oxide, chemical composition mainly with
Iron, silicon, magnesium, calcium, aluminium oxide based on, and with a small amount of phosphorus, sulphur etc., Iron grade is generally 17~23%.Strong magnetic tail ore deposit category
Weak magnetic mineral, grade is high, after magnetizing roast, magnetic separation processing, can obtain the iron ore concentrate of grade more than 54%；Low intensity magnetic separation mine tailing
With flotation tailing category ferromagnetism mine tailing, grade is relatively low, and dioxide-containing silica is high, can not recycle again.
Iron ore tailings belong to difficulty and select low-grade iron ore resource, domestic at present generally to carry out exploitation profit using magnetic separation technology
With, its production technology be tail after multiple tracks magnet drum magnetic separation, obtain rough concentrate that grade is 30~40% again by flotation
Reason, it can obtain the iron ore concentrate that grade is more than 54%.The advantages of this method is the iron that can obtain meeting blast furnace requirement grade
Concentrate, shortcoming are that mine tailing magnetic separation yield is relatively low, water content consumption is larger, production cost is higher and metal recovery rate is relatively low.
At present, because domestic ore-dressing technique equipment is backward and production controls the reason such as improper, mine tailing is integrated for iron ore
During using magnetic separation process ore dressing, the rate of recovery of metal is typically below 50%, it is impossible to makes full use of the iron content in iron ore tailings to provide
Source.
The content of the invention
It is an object of the invention to provide for containing high intensity magnetic separation mine tailing, low intensity magnetic separation mine tailing in iron ore synthesis mine tailing, floating
The situation of mine tailing is selected, according to the relatively low category Fe of the higher magnetic of the grade of high intensity magnetic separation mine tailing2O3, the grade of low intensity magnetic separation mine tailing is relatively low
The higher category Fe of magnetic3O4, the granularity of flotation tailing is relatively thin, grade and dioxide-containing silica are higher relatively high magnetism category Fe3O4Spy
Point, for the technical scheme of iron-containing resource in fully recovery iron ore mixing mine tailing.
To achieve the above object, the present invention provides following technical scheme：
After caking beater is broken up, powdery is integrated mine tailing and carried out using double helix magnetic separator the synthesis mine tailing of natural moisture
Dry type magnetic separation, the ferrous material that magnetic is relatively low, grade is higher in powdery synthesis mine tailing can be made to be separated with other mineral, obtained
The relatively low high intensity magnetic separation mine tailing of magnetic, high intensity magnetic separation mine tailing is fired again, ore grinding and magnetic separation, can obtain the higher iron ore concentrate of grade, obtains
To magnetic tailing construction material or packing material can be used as to be utilized.
Preferably, the present invention to iron ore synthesis mine tailing before double helix magnetic separator dry type magnetic separation is used, for the tail that lumps
The present situation of each more difficult separation of mineral composition magnetic separation in ore deposit, efflorescence, powdery are carried out using caking beater to the synthesis mine tailing of caking
Comprehensive mine tailing carries out dry type magnetic separation using double helix magnetic separator, and the separation that can effectively improve strongly magnetic mineral and weak magnetic mineral is imitated
Fruit.
Preferably, the iron ore synthesis mine tailing that the present invention uses, its Iron grade is 17~23%, dioxide-containing silica 44
~55%, raw meal particle size composition accounts for more than 80% for -200 mesh, belongs to the iron content that Iron grade is relatively low, silicone content is higher, granularity is thinner
Resource.
Compared with prior art, the beneficial effects of the invention are as follows：
（1）Iron ore synthesis mine tailing is developed and utilized using this method, can effectively be reduced valuable in iron ore tailings
Tenor, the utilization rate of iron ore resource is improved, reduce the production cost of iron ore concentrate.
（2）Iron ore synthesis mine tailing is developed and utilized using this method, can effectively solve China's iron ore rich ore money
The present situation that source is short, poor ore resources are rich, effectively reduce the cost of steel products；
（3）Iron ore synthesis mine tailing is developed and utilized using this method, reduces iron ore tailings discharge capacity.
Brief description of the drawings
Fig. 1 is the process flow diagram of the present invention；
Embodiment
As shown in figure 1, a kind of iron ore synthesis dry tail ore dressing throws the method except ferromagnetism mine tailing, this method is according to following steps
It is rapid to carry out：
Step 1：Iron ore integrates the selection of mine tailing：Iron ore of the present invention integrates mine tailing Main Ingredients and Appearance：
TFe:17~23%, silica:44~55%, MgO:2~6%, AI2O3:6~10%, water content is less than 4%, caking grain in mine tailing
Degree is less than 100mm.
Step 2：The comprehensive mine tailing of caking is broken up：The feeding mouth of iron ore tailings from caking beater is added to rotor
In, rotor is rotated in the case where driving motor drives the driving of power transmission shaft, and block mine tailing is in rotor from feeding end
It flow to during discharge end, material is constantly tossed and fallen and carries out making contact with breaing up tooth, makes block mine tailing quilt
Break up.
Step 3：Powdery integrates the magnetic separation of mine tailing：Granularity is less than -200 mesh and accounts for 80% synthesis mine tailing from double helix magnetic separator
After feeding mouth adds, driving motor, power transmission shaft, travelling gear driving under double helix magnetic separator rotated, comprehensive mine tailing
In double helix magnetic separator from feeding end helical feed to discharge end during, with helix tube at a high speed rotate, weakly magnetic mineral
Thing is thrown to lower floor, delivers to the discharge of weak magnetic mineral discharging opening by lower spiral opposite direction, strongly magnetic mineral is attracted to helix tube
On, it is pushed to the discharge of strongly magnetic mineral discharging opening with helix tube rotation.
Step 4：Weak magnetic mineral, i.e. high intensity magnetic separation mine tailing obtained by iron ore synthesis dry tail ore dressing, fired, ore grinding and magnetic
Choosing, it can obtain Iron grade and be more than 54%, meet the iron ore concentrate for sintering requirement.
The operation principle that iron ore synthesis mine tailing strongly magnetic mineral of the present invention separates with weak magnetic mineral：Water content is less than
4%th, the feeding mouth of iron ore synthesis mine tailing from the caking beater of Iron grade 17~23% is added in rotor, rotor
Rotated in the case where driving motor drives the driving of power transmission shaft, block mine tailing flow to discharge end in rotor from feeding end
During, material is constantly tossed and fallen and carries out making contact with breaing up tooth, is broken up block mine tailing.Work as material flow
Move the discharge end of caking beater and granularity less than -200 mesh when accounting for 80%, powdery integrates discharging of the mine tailing from the beater that lumps
Mouth is flowed out into double helix magnetic separator.Powdery mine tailing in driving motor, passes after the entrance of double helix magnetic separator feeding mouth
Moving axis, travelling gear driving under double helix magnetic tube rotated, comprehensive mine tailing is in double helix magnetic separator from feeding end spiral
During being transported to discharge end, as helix tube rotates at a high speed, weak magnetic mineral is thrown to lower floor, sent by lower spiral opposite direction
Discharged to weak magnetic mineral discharging opening, strongly magnetic mineral is adsorbed on the coil, and ferromagnetism is pushed to helix tube rotation
Mineral discharging opening is discharged, and has been reached dry separation and has been thrown the purpose for removing ferromagnetism mine tailing.
Claims (1)
1. a kind of iron ore synthesis dry tail ore dressing throws the method except ferromagnetism mine tailing, it is characterised in that：This method is according to following steps
It is rapid to carry out：
（1）Pre-selection：Thrown by dry separation and remove relatively high magnetism, the flotation tailing that grade is relatively low, dioxide-containing silica is high and low intensity magnetic separation tail
Ore deposit, obtain integrating mine tailing；
（2）Primary election：Mine tailing is integrated after caking beater is broken up as after powdery, dry type magnetic separation is carried out using double helix magnetic separator,
High intensity magnetic separation mine tailing, flotation tailing and the low intensity magnetic separation mine tailing that magnetic is weaker, grade is relatively low in powdery synthesis mine tailing are separated, respectively
Obtain that grade is higher, weaker can be calcined again of magnetic sorts the high intensity magnetic separation mine tailing utilized and flotation tailing and low intensity magnetic separation tail
Ore deposit；
（3）It is selected：High intensity magnetic separation mine tailing passes through reduction roasting, ore grinding and magnetic separation, can obtain the iron ore concentrate of Iron grade more than 54%；
Wherein iron ore mixing mine tailing composition is：TFe:17~23%, SiO2:44~55%, MgO:2~6%, AI2O3:6~10%,
Water content is less than 4%, agglomerated particle size and is less than 100mm in mine tailing.
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| CN201610150162.2A CN105797847B (en) | 2016-03-16 | 2016-03-16 | A kind of iron ore synthesis dry tail ore dressing throws the method except ferromagnetism mine tailing |
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| CN201610150162.2A CN105797847B (en) | 2016-03-16 | 2016-03-16 | A kind of iron ore synthesis dry tail ore dressing throws the method except ferromagnetism mine tailing |
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| CN107365905B (en) * | 2017-07-11 | 2019-03-12 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of refractory iron ore closed circuit shower furnace roasting dry grinding dry separation craft online |
| CN107365904B (en) * | 2017-07-11 | 2019-01-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of iron ore shaft roasting magnetic separation flotation tailing recycling technique |
| CN107262276A (en) * | 2017-07-11 | 2017-10-20 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of hermetically sealed dry type of fine fraction magnetic iron ore throws useless technique |
| CN107309081B (en) * | 2017-07-11 | 2018-10-02 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of processing barren rocks iron selection technique |
| CN108080142B (en) * | 2017-11-28 | 2019-09-10 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of shaft roasting mine quality grading ore-dressing technique |
| CN110586315B (en) * | 2019-10-24 | 2021-04-23 | 武汉科技大学 | Full-dry type iron ore sorting method |
| RU2726808C1 (en) * | 2020-02-07 | 2020-07-15 | Геннадий Викторович Баловленков | Method of crushed stone production from iron ore beneficiation wastes |
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| SU1799626A1 (en) * | 1991-02-12 | 1993-03-07 | Ni I Pi Obogashcheniyu I Aglom | Method for magnetic concentration of weakly magnetic ores |
| CN101003093A (en) * | 2007-01-22 | 2007-07-25 | 孙爱军 | Technique for extracting iron refined powder base on industrial mine tailings of containing iron |
| JP5370211B2 (en) * | 2010-02-22 | 2013-12-18 | Ｊｆｅスチール株式会社 | Raw material method and equipment for low-grade iron scrap |
| CN103468936B (en) * | 2013-08-15 | 2015-12-02 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of refractory iron ore mine tailing pelletizing rotary kiln magnetizing roasting treatment process |
| CN105195306A (en) * | 2015-11-05 | 2015-12-30 | 攀钢集团矿业有限公司 | Separation method of low-grade magnetic minerals |
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