CN109351467A - A kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic - Google Patents
A kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic Download PDFInfo
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- CN109351467A CN109351467A CN201811098617.6A CN201811098617A CN109351467A CN 109351467 A CN109351467 A CN 109351467A CN 201811098617 A CN201811098617 A CN 201811098617A CN 109351467 A CN109351467 A CN 109351467A
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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
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Abstract
The present invention relates to a kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic to obtain one point and overflow including being that 27%~29%, mixed ore based on magnetic iron ore feeds one section of closed circuit grinding by grade；It is characterized by also including the strong magnetic of one section of weak magnetic, dusting cover, one section of magnetic sieves to eluriate magnetic separation, two sections of closed circuit grindings, the strong magnetic of two sections of weak magnetics, two sections of magnetic sieve elutriation magnetic separation, three-section closed circuit ore grinding, the strong magnetic of three sections of weak magnetics and reverse flotation work；By above-mentioned operation, the final concentrate that grade is 66% ~ 66.5% is obtained.Compared with the existing technology, the invention has the advantages that 1) provide a kind of efficient separation technique that dissociation takes the stage grinding of essence throwing tail, segmentation to take essence and segmentation throwing tail for the red mixed ore of magnetic of iron mineral disseminated grain size thickness unevenness, mitigate it is overground, it is energy-saving；2) upgrading of magnetic sieve apparatus is used, three sections of ore grindings are carried out using vertical mill；3) flowage structure is simple, and without middling cycle, scene is easily implemented, and is readily produced management operation.
Description
Technical field
The invention belongs to technical field of mineral processing, and in particular to one kind handles the red mixing of magnetic based on iron mineral disseminated grain size
The sorting process of ore.
Background technique
Certain magnetic red mixed ore of the higher magnetic of iron content (magnet mineral content account for its iron mineral content 70% or more),
Iron mineral is mainly magnetic iron ore, hematite-limonite, and ferric carbonate, silicic acid iron content are all less；Gangue mineral is mainly quartz, harmful miscellaneous
Matter sulphur, the content of phosphorus are all lower.Iron mineral disseminated grain size is essentially all non-uniform in the red mixed ore of magnetic.It is red to the magnetic mixed
Close ore process mineralogy property studies have shown that the mixed ore be iron mineral disseminated grain size unevenness ore, be wherein first
Magnetic mineral disseminated grain size thickness it is uneven, the magnetic iron ore disseminated grain size that be averaged is 52 μm, wherein 40% or so the embedding cloth grain of magnetic iron ore
Degree more slightly can reach 85 μm or more, and segment magnet mine disseminated grain size more carefully only has 35 μm or so；Hematite-limonite in the mine simultaneously
Disseminated grain size more averagely only have 35 μm；The mine gangue mineral disseminated grain size is thicker, and average disseminated grain size has reached 75 μm.
Poor iron ore of the most domestic iron ore beneficiating factory processing at present based on magnetic iron ore mostly uses that " stage grinding is single
Magnetic separation-spun yarn evenness process " or " stage grinding-magnetic, again, floating combined process flow " are sorted.
When " the single magnetic separation of stage grinding-spun yarn evenness process " handles magnet mineral content higher mixed ore, generally by
In wherein bloodstone content, less and its disseminated grain size is more carefully difficult to sort, and the weakly magnetic tailings for finally sorting each section are as final
Tailing is directly dished out, and is caused to make true tailings grade higher because hematite-limonite content is higher in true tailings, be substantially reduced
The metal recovery rate of process, prevent useful iron mineral source is from adequately being recycled；It secondly should " stage grinding
Single magnetic separation-spun yarn evenness process " suitable treatment iron mineral disseminated grain size is relatively thin and iron ore that gangue mineral granularity is relatively thick
Stone so can sort throwing tail after stage grinding, but will obtain final qualified iron ore concentrate and must carry out regrinding and reconcentration；Third is that " rank
When carrying out classification upgrading to fine-grained disseminated grain iron mineral using dusting cover equipment in the single magnetic separation of section ore grinding-spun yarn evenness process ", by
It is small in screen size, cause fine screening classification efficiency lower, it is larger to return to the mine amount regrinded on dusting cover sieve, not only increases ore grinding energy consumption
But also it be easy to cause iron ore overground, influence the raising of iron mineral metal recovery rate and final concentrate quality.
Handle the others " stage grinding-magnetic, again, floating combined process flow " of the magnetic red mixed ore of the higher magnetic of iron content
It also is all to throw tail the stage grinding stage, after magnetic, finally the sorting concentrate all and be and sorted at one section of primary grinding and throw tail of bloodstone,
One section of rough concentrate is carried out to continue to sort just available final qualified iron ore concentrate after two sections or three sections of ore grindings again, is not segmented mill
The mine qualified tailings that can dish out can take the sorting process of final concentrate again.It is existing " stage grinding-magnetic, again, floating combined stream
Such as magnetic iron ore is separated in journey " and individually goes out final concentrate, is typically also by the way of weak magnetic-dusting cover-weak magnetic or using weight
Choosing method (such as spiral chute or centrifuge gravitational separation equipment).It is embedding again for particulate using weak magnetic-dusting cover-weak magnetic method
The upgrading of cloth magnetic iron ore, and use reselecting method one side equipment occupation space big, it sorts low efficiency and there are middling cycle, streams
Journey is not easy to control；In addition a large amount of magnetic iron ore chats finally all still needs to carefully in these " stage grindings-magnetic, again, floating combined process flow "
Merge after mill with hematite-limonite and sorted using gravity treatment or method for floating, gravity treatment is not to sort the optimal selection of magnetic mine, and content
This higher part magnetism mine feeds flotation, not only increases flotation milling capacity, floating agent dosage is caused to increase, and increases choosing
Other cost, and also add medicament pollution.
Summary of the invention
The object of the present invention is to provide a kind of stage grinding, segmentations to take essence and segmentation throwing tail processing iron mineral disseminated grain size thick
It is thin uneven, the grder man based on the iron mineral disseminated grain size processing red mixed ore of magnetic of the red mixed ore of magnetic based on magnetic iron ore
Skill.
The present invention is implemented as follows:
A kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic of the invention, including by grade be 27%
Mixed ore of~29% Armco magnetic iron distributive law higher than 70% feeds one section of closed circuit mill of primary grinding and cyclone composition
Mine operation obtains the scalping overflow product that granularity is -200 mesh contents 60%~65%；It is characterized by also including following works
Industry: the strong magnetic operation of one section of weak magnetic, dusting cover operation, one section of magnetic sieve and one section of elutriation magnetic concentration working, two sections of closed circuit grinding operations, two sections
The strong magnetic operation of weak magnetic, two sections of magnetic sieve and two sections of elutriations magnetic concentration workings, three-section closed circuit grinding operation, the strong magnetic operation of three sections of weak magnetics and instead
Flotation operation；The strong magnetic operation of one section of weak magnetic handles scalping overflow product, and one section of the dusting cover operation processing is weak
Magnetic concentrate, one section of magnetic sieve and one section of elutriation magnetic concentration working handle dusting cover undersize, and two sections of closed circuit grindings are made
Industry handles dusting cover oversize, magnetic sieve sieves lower chats and one section of high intensity magnetic mineral, and the strong magnetic operation processing of two sections of weak magnetics is secondary
Grading Overflow product, two sections of magnetic sieve and two sections of elutriation magnetic concentration workings handle two sections of inferior fine magnetite concentrates, the three-section closed circuit
Grinding operation handles two sections of magnetic sieves and sieves lower chats and two sections of high intensity magnetic minerals, and the strong magnetic operation processing of three sections of weak magnetics is classified three times
Overflow product, the reverse flotation work handle three sections of inferior fine magnetite concentrates and three sections of high intensity magnetic minerals.
The strong magnetic operation of one section of weak magnetic is made of one section of weak magnetic and one section strong magnetic, and scalping overflow product is fed
One section of weak magnetic, obtains one section of inferior fine magnetite concentrate and one section of weakly magnetic tailings that grade is 55%~57%, and one section of weakly magnetic tailings feeds one section
Qiang Ci, obtains one section of high intensity magnetic mineral and one section strong magnetic tail mine, and the strong magnetic tail mine of one section of coarse grain throws tail；
The dusting cover operation is the high frequency vibrating fine screen that screen size is 0.5 × 0.5mm, will take off one section of magnetic by demagnetizer
Inferior fine magnetite concentrate feeds high frequency vibrating fine screen, obtains dusting cover undersize and dusting cover oversize；
One section of magnetic sieve and one section of elutriation magnetic concentration working is by one section of magnetic sieve that sieve pore is 1.5mm and one section of elutriation magnetic separator group
At dusting cover undersize feeds one section of magnetic sieve, obtains one section of magnetic sieve that grade is 64.5% or more and sieves upper concentrate and one section of magnetic
Sieve sieves lower chats, and one section of magnetic sieve sieves upper concentrate and feeds one section of elutriation magnetic separator after demagnetizer takes off magnetic, and obtaining grade is 65.5%
Above one section of elutriation magnetic separator coarse-grain coarse ore concentrate and one section of elutriation magnetic separator chats；
The closed circuit grinding that two sections of closed circuit grinding operations are made of swirl flow device and secondary grinding, dusting cover is sieved and is produced
Product, one section of high intensity magnetic mineral and one section of magnetic sieve sieve lower chats merging and feed two sections of closed circuit grinding operations, and obtaining granularity is that -200 mesh contain
The secondary grading overflow product of amount 85%~90%；
The strong magnetic operation of two sections of weak magnetics is made of two sections of weak magnetics and two sections strong magnetic, and secondary grading overflow product is fed two sections
Weak magnetic obtains two sections of inferior fine magnetite concentrates and two sections of weakly magnetic tailings that grade is 58% or more, and two sections of weakly magnetic tailings feed two sections of strong magnetic,
Two sections of high intensity magnetic minerals and two sections strong magnetic tail mine are obtained, the strong magnetic tail mine of two sections of middle grain throws tail；
Two sections of magnetic sieve and two sections of elutriation magnetic concentration workings is by two sections of magnetic sieve that sieve pore is 1.2mm and two sections of elutriation magnetic separator groups
At, two sections of inferior fine magnetite concentrates are fed into two sections of magnetic after demagnetizer takes off magnetic and are sieved, two sections of magnetic sieve sieve that acquisition grade is 65.5% or more
Upper concentrate and two sections of magnetic sieves sieve lower chats, and magnetic sieve sieves upper concentrate and feeds two sections of elutriation magnetic separators after demagnetizer takes off magnetic, obtains
Grain concentrate and two sections of elutriation magnetic separator chats in two sections of elutriation magnetic separators that grade is 66.5% or more；
The closed circuit grinding that the three-section closed circuit grinding operation is made of cyclone three times and three sections of vertical mills eluriates one section
Magnetic separator chats, two sections of elutriation magnetic separator chats, two sections of magnetic sieves sieve lower chats and two sections of high intensity magnetic mineral merging feed three-section closed circuit
Grinding operation obtains the Grading Overflow product three times that granularity is -325 mesh contents 85%~90%；
The strong magnetic operation of three sections of weak magnetics is made of three sections of weak magnetics and three sections strong magnetic, will feed three sections by Grading Overflow product three times
Weak magnetic obtains three sections of inferior fine magnetite concentrates and three sections of weakly magnetic tailings, and three sections of weakly magnetic tailings feed three sections of strong magnetic, obtains three sections of high intensity magnetic minerals
With three sections strong magnetic tail mine, the strong magnetic tail mine of three sections of particulate throws tail；
The reverse flotation work is that a thick essence three sweeps normal process, scans each operation concentrate and successively returns to upper section operation, essence
It is elected to be industry tailing and feeds reverse flotation work back to roughing operation, three sections of inferior fine magnetite concentrates and three sections of high intensity magnetic mineral merging, obtain product
The reverse flotation fine concentrate and reverse flotation tailing of 67.5% or more position, the reverse flotation tailing throwing tail of particulate, reverse flotation fine concentrate,
Grain concentrate and one section of elutriation magnetic separator coarse-grain coarse ore concentrate merge into final concentrate in two sections of elutriation magnetic separators, and grade is 66% ~ 66.5%；
Reverse flotation tailing, three sections strong magnetic tail mine, two sections strong magnetic tail mine and one section strong magnetic tail mine merge into true tailings, and grade is 12% ~
14%。
Compared with the existing technology, the invention has the advantages that
1) present invention throws tail processing iron mineral disseminated grain size thickness unevenness by essence and segmentation using stage grinding, segmentation, with magnet
The red mixed ore of magnetic based on mine, uneven especially for magnetic iron ore, the disseminated grain size thickness of bloodstone in the red mixed ore of magnetic,
Magnet mineral content reaches 70% or more mixed ore, and the present invention provides a kind of dissociation, and essence to be taken to throw the stage grinding of tail, segmentation
The efficient separation technique of tail is thrown by essence and segmentation；
2) under the conditions of one section of corase grinding, the iron mineral of the embedding cloth of coarse grain largely obtains monomer dissociation, using weak magnetic-magnetic sieve-elutriation
Magnetic separator technique obtains the qualified coarse grain magnetite concentrate of a part；After secondary grinding, the magnet mineral of most of embedding cloth of medium size
Monomer dissociation is obtained, the middle grain magnetite concentrate of another part qualification is equally obtained using weak magnetic-magnetic sieve-elutriation magnetic separator technique,
It is also most of to obtain monomer dissociation after three sections of vertical mill ore grindings for the iron mineral of fine-grained disseminated grain, then using the weak of maturation
Strong magnetic-the reverse floatation process of magnetic-obtains high-grade particulate magnetic hematite concentrates, and this stage for different disseminated grain size mineral grinds
Mine stage grading takes essence to throw the technique of tail, significantly reduces ore grinding energy consumption, alleviates overground phenomenon, realizes energy-saving, changes
Into technical indicator.
3) after one section of corase grinding magnetic separation, upgrading, Magnetic field screening separator model CSX series magnetic are carried out using advanced magnetic sieve apparatus
Field screening machine is avoided using traditional weak magnetic separator because its magnetic field strength is higher, while attracting monomer magnetic mineral particles,
Also a large amount of rich magnetite deposit intergrowths have been adsorbed, so that being difficult to obtain qualified iron ore concentrate under the conditions of compared with coarseness.
4) after secondary grinding magnetic separation, upgrading, Magnetic field screening separator model CSX series magnetic are carried out using advanced magnetic sieve apparatus
Screening machine, the upper concentrate product yield of sieve is high, sieves lower chats product low yield and wherein intergrowth content height, efficiency of separation height,
The fine grinding mine amount for reducing next section, reduces ore grinding energy consumption, avoids the overground phenomenon of iron mineral；
5) ore grinding, three sections of vertical mill model JM series vertical mill blenders, difficult tribulation are carried out using advanced grinding attachment
After a small amount of magnetic, the bloodstone of the fine-grained disseminated grain of choosing pass through vertical mill fine grinding, iron mineral has also reached monomer dissociation degree, passes through
Efficient reverse floatation process obtains high-grade flotation concentrate, and the grade for improving final concentrate reaches ideal indicator；
6) it needs the mine amount of flotation less, not only simplification of flowsheet operation difficulty, also reduces floating agent dosage, reduction is sorted into
This, while medicament pollution is also reduced, reach energy-saving and environment-friendly purpose；
7) final concentrate product by the magnetite concentrate of coarse grain, the magnetite concentrate of the embedding cloth of middle grain and particulate bulk flotation concentrate group
Mine condition is given at, this compositional optimization filter, filter efficiency can be improved, reduces filtering cost；
8) combination of magnetic sieve and elutriation magnetic separator, further increases and stabilizes final concentrate grade；
9) flowage structure is simple, does not have middling cycle in process, and scene is easily implemented, and is readily produced management operation.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 1, the iron mineral disseminated grain size of the invention in higher, mixed magnetite and hematite according to raw ore magnetism iron content
The features such as thickness is uneven takes essence and segmentation to throw the ore grinding sorting process of tail to carry out to such ore using stage grinding, segmentation
Sorting.
A kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic of the invention, including by Iron grade
For 28%, Armco magnetic iron distributive law be 75% mixed ore feed primary grinding and a cyclone composition one section of closed circuit grinding make
Industry obtains the scalping overflow product that granularity is -200 mesh contents 65%；It is characterized by also including following operations:
The strong magnetic operation of one section of weak magnetic: the strong magnetic operation of one section of weak magnetic is made of one section of weak magnetic and one section strong magnetic, by scalping overflow
Product feeds one section of weak magnetic, obtains one section of inferior fine magnetite concentrate and one section of weakly magnetic tailings that grade is 56%, and one section of weakly magnetic tailings feeds one
The strong magnetic of section obtains one section of high intensity magnetic mineral and grade as 8% one section strong magnetic tail mine, and the strong magnetic tail mine of one section of coarse grain throws tail；
Dusting cover operation: dusting cover operation is the high frequency vibrating fine screen that screen size is 0.5mm, will be weak by one section of the de- magnetic of demagnetizer
Magnetic concentrate feeds high frequency vibrating fine screen, obtains dusting cover undersize and dusting cover oversize；
One section of magnetic sieve and one section of elutriation magnetic concentration working: one section of magnetic sieve and one section of one section for eluriating magnetic concentration working by sieve pore for 1.5mm
Magnetic sieve and one section of elutriation magnetic separator composition, dusting cover undersize feed one section of magnetic sieve, obtain one section of magnetic that grade is 64.7%
Sieve sieves upper concentrate and one section of magnetic sieve sieves lower chats, and one section of magnetic sieve sieves upper concentrate and feeds one section of elutriation magnetic separation after demagnetizer takes off magnetic
Machine obtains one section of elutriation magnetic separator coarse-grain coarse ore concentrate and one section of elutriation magnetic separator chats that grade is 65.5%；Due to being roughly ground at one section
Afterwards, under conditions of the magnet mineral of the embedding cloth of coarse grain reach monomer dissociation, by the ad hoc low magnetic field of Magnetic field screening separator by ore pulp
Interior monomer magnetic mineral particles are magnetized into catemer.Using which increase magnetic iron ore and gangue intergrowth sinking speed is poor, ruler
Coarse grain magnetic iron ore is effectively separated with gangue and intergrowth using " Special screen " being mounted in low magnetic field, is avoided by very little difference
Using traditional weak magnetic separator because its magnetic field strength is higher, attracts magnetic mineral particles while, a large amount of richness magnetic have also been adsorbed
Iron ore intergrowth, so that being difficult to obtain qualified iron ore concentrate under the conditions of compared with coarseness.
Two sections of closed circuit grinding operations of the invention: two sections of closed circuit grinding operations are made of swirl flow device and secondary grinding
Dusting cover oversize, one section of high intensity magnetic mineral and one section of magnetic sieve are sieved lower chats merging and feed two sections of closed circuit grindings works by closed circuit grinding
Industry obtains the secondary grading overflow product that granularity is -200 mesh contents 88%；
The strong magnetic operation of two sections of weak magnetics: the strong magnetic operation of two sections of weak magnetics is made of two sections of weak magnetics and two sections strong magnetic, by secondary grading overflow
Product feeds two sections of weak magnetics, obtains two sections of inferior fine magnetite concentrates and two sections of weakly magnetic tailings that grade is 58%, and two sections of weakly magnetic tailings feed two
The strong magnetic of section obtains two sections of high intensity magnetic minerals and grade as 11% two sections strong magnetic tail mine, and the strong magnetic tail mine of two sections of middle grain throws tail；
Two sections of magnetic sieves and two sections of elutriation magnetic concentration workings: two sections of magnetic sieves and two sections of two sections for eluriating magnetic concentration working by sieve pore for 1.2mm
Two sections of inferior fine magnetite concentrates are fed after demagnetizer takes off magnetic two sections of magnetic sieves, obtain grade by magnetic sieve and two sections of elutriation magnetic separator compositions
Two sections of magnetic sieve for 65.7% sieves upper concentrate and two sections of magnetic sieves sieve lower chats, and two sections of magnetic sieves sieve upper concentrate after demagnetizer takes off magnetic
Two sections of elutriation magnetic separators are fed, are obtained in two sections of elutriation magnetic separators that grade is 66.5% in grain concentrate and two sections of elutriation magnetic separators
Mine；It is same to select Magnetic field screening separator and abandon the embedding cloth magnet essence of vibrating fine screen centering grain after secondary grinding weak magnetic of the present invention sorts
Mine upgrading is, screening efficiency high advantage relatively large based on Magnetic field screening separator screen size, reduces the lower chats mine amount of sieve,
Subsequent fine grinding treating capacity is reduced, ball milling energy consumption can be further decreased.
Three-section closed circuit grinding operation: three-section closed circuit grinding operation is made of cyclone three times with three sections of vertical mills closed circuit
One section of elutriation magnetic separator chats, two sections of elutriation magnetic separator chats, two sections of magnetic sieves are sieved lower chats and two sections of high intensity magnetic minerals close by ore grinding
And three-section closed circuit grinding operation is fed, obtain the Grading Overflow product three times that granularity is -325 mesh contents 91%；
The strong magnetic operation of three sections of weak magnetics: the strong magnetic operation of three sections of weak magnetics is made of three sections of weak magnetics and three sections strong magnetic, will Grading Overflow three times
Product feeds three sections of weak magnetics, obtains three sections of inferior fine magnetite concentrates and three sections of weakly magnetic tailings that grade is 60%, and three sections of weakly magnetic tailings feed three
The strong magnetic of section obtains three sections of high intensity magnetic minerals that grade is 35% and the three sections strong magnetic tail mine that grade is 13%, three sections of strong magnetic tails of particulate
Mine throws tail；
Reverse flotation work: reverse flotation work is that a thick essence three sweeps normal process, scans each operation concentrate and successively returns to upper section work
Industry, selected operation tailing return to roughing operation, and three sections of inferior fine magnetite concentrates and three sections of high intensity magnetic mineral merging feed reverse flotation work, obtain
Reverse flotation fine concentrate and the grade of grade 67.7% are obtained as 18% reverse flotation tailing, the reverse flotation tailing of particulate throws tail, anti-floating
Select fine concentrate, grain concentrate and one section of elutriation magnetic separator coarse-grain coarse ore concentrate merge into final concentrate, grade in two sections of elutriation magnetic separators
It is 66.5%；Reverse flotation tailing, three sections strong magnetic tail mine, two sections strong magnetic tail mine and one section strong magnetic tail mine merge into true tailings, grade
It is 14%.
Magnetic field screening separator and vertical mill brief introduction
Magnetic field screening separator (abbreviation magnetic sieve) is Magnetic field screening method equipment, and the implementation difference is in traditional weak magnetic separator by directly attracting magnetic
Property mineral grain principle, Magnetic field screening separator using its ad hoc low magnetic field by ore pulp magnetic mineral particles magnetize chaining
Shape body, increases that magnetic iron ore is poor with gangue intergrowth sinking speed, size is poor, while utilizing " Special screen " being mounted in magnetic field
Magnetic iron ore is separated with gangue and intergrowth effectively, makes the micro fine particle magnetite dissociated as concentrate output, therefore is solved
Traditional weak magnetic separator is easily mingled with gangue, it more difficult to separate the defect of intergrowth, to realize the height of fine-grained disseminated grain magnetic iron ore
Effect sorting.Magnetic sieves not simple magnetic separation technology equipment, carries out magnetic gravitation combined sorting by magnetic field medium characteristic
Technical equipment (material is sieved by mineral purity, is concentrate on sieve and granularity is thinner, be chats under sieve and granularity is thicker).
Vertical mill is that a kind of right angle setting, cylinder are fixed, the interior fine grinding equipment with spiral agitator.Vertical mill usually with
Cyclone forms closed circuit grinding, and spiral agitator, Jie in grinding machine are housed on the central axis direction of cylinder-shaped grinding chamber
Matter is done shuttling movement up and down, is ground to the material of addition due to the stirring action of spiral.Milling medium is generally diameter
The steel ball of 12mm.Material is fed from the lower part of grinding machine, and after media-milled, qualified product divides under the action of gravity and external force
From from the top of grinding machine spilling, heavier particle, which then stays in, to be continued to be ground in grinding machine.The suitable product granularity of vertical mill
P80 is generally 74~20 μm.Compared with ball mill, vertical mill is advantageous in that: efficient fine grinding can prevent overground；Energy consumption is saved,
Within the scope of suitable product granularity, reduced significantly than ball mill energy consumption；Easily operated, maintenance and installation；Noise
Low, with small vibration, occupied area is small, and Equipment Foundations are simple.
Claims (10)
1. it is a kind of based on iron mineral disseminated grain size processing the red mixed ore of magnetic sorting process, including by grade be 27%~29%,
Mixed ore of the Armco magnetic iron distributive law higher than 70% feeds one section of closed circuit grinding operation of primary grinding and cyclone composition,
Obtain the scalping overflow product that granularity is -200 mesh contents 60%~65%；It is characterized by also including following operations: one section
The strong magnetic operation of weak magnetic, dusting cover operation, one section of magnetic sieve and one section of elutriation magnetic concentration working, two sections of closed circuit grinding operations, two sections of weak magnetics are strong
Magnetic operation, two sections of magnetic sieves and two sections of elutriation magnetic concentration workings, three-section closed circuit grinding operation, the strong magnetic operation of three sections of weak magnetics and reverse flotation are made
Industry；The strong magnetic operation of one section of weak magnetic handles scalping overflow product, and the dusting cover operation handles one section of inferior fine magnetite concentrate,
One section of magnetic sieve and one section of elutriation magnetic concentration working handles dusting cover undersize, and two sections of closed circuit grinding operations processing is thin
Sieve oversize, magnetic sieve sieves lower chats and one section of high intensity magnetic mineral, the strong magnetic operation processing secondary grading overflow of two sections of weak magnetics
Product, two sections of magnetic sieve and two sections of elutriation magnetic concentration workings handle two sections of inferior fine magnetite concentrates, the three-section closed circuit grinding operation
It handles two sections of magnetic sieves and sieves lower chats and two sections of high intensity magnetic minerals, Grading Overflow produces the strong magnetic operation processing of three sections of weak magnetics three times
Product, the reverse flotation work handle three sections of inferior fine magnetite concentrates and three sections of high intensity magnetic minerals.
2. a kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic according to claim 1,
It is characterized in that the strong magnetic operation of one section of weak magnetic is made of one section of weak magnetic and one section strong magnetic, scalping overflow product is fed
One section of weak magnetic obtains one section of inferior fine magnetite concentrate and one section of weakly magnetic tailings that grade is 56%, and one section of weakly magnetic tailings feeds one section of strong magnetic,
One section of high intensity magnetic mineral and grade are obtained as 6% ~ 9% one section strong magnetic tail mine, the strong magnetic tail mine of one section of coarse grain throws tail.
3. a kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic according to claim 1,
It is characterized in that the dusting cover operation is the high frequency vibrating fine screen that screen size is 0.5 × 0.5mm, magnetic will be taken off by demagnetizer
One section of inferior fine magnetite concentrate feeds high frequency vibrating fine screen, obtains dusting cover undersize and dusting cover oversize.
4. a kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic according to claim 1,
It is characterized in that one section of magnetic sieves and one section of elutriation magnetic concentration working is sieved by one section of magnetic that sieve pore is 1.5mm and one section of elutriation magnetic separation
Machine composition, dusting cover undersize feed one section of magnetic sieve, obtain one section of magnetic sieve that grade is 64.5% or more and sieve upper concentrate and one
Section magnetic sieve sieves lower chats, and one section of magnetic sieve sieves upper concentrate and feeds one section of elutriation magnetic separator after demagnetizer takes off magnetic, and obtaining grade is
65.5% or more one section of elutriation magnetic separator coarse-grain coarse ore concentrate and one section of elutriation magnetic separator chats.
5. a kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic according to claim 1,
It is characterized in that the closed circuit grinding that two sections of closed circuit grinding operations are made of swirl flow device and secondary grinding, dusting cover is sieved
Upper product, one section of high intensity magnetic mineral and one section of magnetic sieve sieve lower chats merging and feed two sections of closed circuit grinding operations, and obtaining granularity is -200
The secondary grading overflow product of mesh content 85%~90%.
6. a kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic according to claim 1,
It is characterized in that the strong magnetic operation of two sections of weak magnetics is made of two sections of weak magnetics and two sections strong magnetic, secondary grading overflow product is fed
Two sections of weak magnetics, obtain two sections of inferior fine magnetite concentrates and two sections of weakly magnetic tailings that grade is 58% or more, and two sections of weakly magnetic tailings feed two sections strong
Magnetic obtains two sections of high intensity magnetic minerals and grade as 10% ~ 12% two sections strong magnetic tail mine, and the strong magnetic tail mine of two sections of middle grain throws tail.
7. a kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic according to claim 1,
It is characterized in that two sections of magnetic sieve and two sections of elutriation magnetic concentration workings are sieved by two sections of magnetic that sieve pore is 1.2mm and two sections of elutriation magnetic separation
Two sections of inferior fine magnetite concentrates are fed after demagnetizer takes off magnetic two sections of magnetic sieves, obtain two sections of magnetic that grade is 65.5% or more by machine composition
Sieve sieves upper concentrate and two sections of magnetic sieves sieve lower chats, and two sections of magnetic sieves sieve upper concentrate and feed two sections of elutriation magnetic separation after demagnetizer takes off magnetic
Machine obtains grain concentrate and two sections of elutriation magnetic separator chats in two sections of elutriation magnetic separators that grade is 66.5% or more.
8. a kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic according to claim 1,
The closed circuit grinding that the three-section closed circuit grinding operation is made of cyclone three times and three sections of vertical mills is characterized in that, by one section
Elutriation magnetic separator chats, two sections of elutriation magnetic separator chats, two sections of magnetic sieves sieve lower chats and two sections of high intensity magnetic mineral merging feed three sections
Closed circuit grinding operation obtains the Grading Overflow product three times that granularity is -325 90% or more mesh contents.
9. a kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic according to claim 1,
It is characterized in that the strong magnetic operation of three sections of weak magnetics is made of three sections of weak magnetics and three sections strong magnetic, Grading Overflow product will feed three times
Three sections of weak magnetics obtain three sections of inferior fine magnetite concentrates and three sections of weakly magnetic tailings, and three sections of weakly magnetic tailings feed three sections of strong magnetic, obtain three sections of strong magnetic
The three sections strong magnetic tail mine that concentrate and grade are 12% ~ 14%, the strong magnetic tail mine of three sections of particulate throw tail.
10. a kind of sorting process based on the iron mineral disseminated grain size processing red mixed ore of magnetic according to claim 1,
It is characterized in that the reverse flotation work is that a thick essence three sweeps normal process, scans each operation concentrate and successively return to upper section work
Industry, selected operation tailing return to roughing operation, and three sections of inferior fine magnetite concentrates and three sections of high intensity magnetic mineral merging feed reverse flotation work, obtain
16% ~ 18% reverse flotation tailing of reverse flotation fine concentrate and grade grade of 67.5% or more grade is obtained, the reverse flotation tailing of particulate is thrown
Tail, grain concentrate and one section of elutriation magnetic separator coarse-grain coarse ore concentrate merge into final essence in reverse flotation fine concentrate, two sections of elutriation magnetic separators
Mine, grade are 66% ~ 66.5%；Reverse flotation tailing, three sections strong magnetic tail mine, two sections strong magnetic tail mine and one section strong magnetic tail mine are merged into most
Finality mine, product 13% ~ 15%.
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