CN109127112A - A kind of ore-dressing technique handling high-grade or low grade hematite four kinds of products of production - Google Patents
A kind of ore-dressing technique handling high-grade or low grade hematite four kinds of products of production Download PDFInfo
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- CN109127112A CN109127112A CN201811013597.8A CN201811013597A CN109127112A CN 109127112 A CN109127112 A CN 109127112A CN 201811013597 A CN201811013597 A CN 201811013597A CN 109127112 A CN109127112 A CN 109127112A
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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 the ore-dressing techniques that a kind of processing high-grade or low grade hematite produce four kinds of products, including coarse crushing crusher and in broken crushing system, feature is further including that two product of high-grade bloodstone sorts system, two product of low grade hematite sorts system, switching system I and switching system II；The two product ore-sorting system of high-grade bloodstone includes switching system I, transhipment belt conveyor A and block iron ore concentrate feed bin A；Switching system II, transhipment belt conveyor B and the powder iron ore concentrate feed bin B for storing 0mm~36mm；The two product ore-sorting system of low grade hematite further includes that the mill other than two switching systems selects system.It is an advantage of the invention that different products can be produced according to difference to mine grade, and production is flexibly adjustable, realizes the high efficiente callback to microfine sludge.
Description
Technical field
The invention belongs to iron ore beneficiation technical field, especially a kind of processing high-grade or low grade hematite produce four kinds
The ore-dressing technique of product.
Background technique
Currently, many opencast iron ore mines have multiple mine sections to constitute, and the head grade of each mine section is different, and single
The grade of ore that a mine section is unable to buried depth is also different, and during exploitation, the grade of ore fluctuates very big, some mine mines
The fluctuation range of stone Iron grade even covers 35%~60% range.High grade ore more than 55% grade is generally passed through
It can directly transport after broken and be sold as straight fortune mine, and be generally required lower than the ore of 55% grade and select upgrading through overground
Laggard marketing is sold.Opencast earth's surface mine is longer generally with bloodstone and the red iron of illusion due to the time of contact oxygen and water
Magnetic iron ore and ferruginous clay based on mine, and containing part.According to the difference of oxide ore degree of hydration and crystal structure, oxide ore
Bloodstone, limonite and goethite can be divided into again.For this more grades mine we it is necessary to research and develop one kind being capable of basis
The variation of ore quality produces different products, and produces flexibly adjustable more grade bloodstone multi-product ore-dressing techniques.
Summary of the invention
The purpose of the present invention is one kind can produce different products to mine grade according to difference, and produces flexibly adjustable
Processing high-grade or low grade hematite produce four kinds of products ore-dressing technique.
The purpose of the present invention is what is realized by following technical proposals:
A kind of processing high-grade of the invention or low grade hematite produce the ore-dressing technique of four kinds of products, including coarse crushing crusher
The broken crushing system in, feature are further including that two product of high-grade bloodstone sorts system, the choosing of two product of low grade hematite
Other system, switching system I and switching system II；
In described broken crushing system include in broken gyratory crusher and broken gyratory crusher is connect in the double-deck straight-line oscillation
Sieve is equipped with oversize outlet, undersize outlet and intermediate products outlet, the double-deck straight-line oscillation on the double-deck linear vibrating screen
Broken crusher is connected to form closed circuit in the oversize return of sieve；
The two product ore-sorting system of high-grade bloodstone includes cutting with what the double-deck linear vibrating screen intermediate products outlet was connected
System I is changed, the transhipment belt conveyor A being connected with switching system I and the smelting block iron ore concentrate for storing 6mm~36mm
Feed bin A, the switching system II being connected with the outlet of the double-deck linear vibrating screen undersize, the transhipment being connected with switching system II
Belt conveyor B and smelting powder iron ore concentrate feed bin B for storing 6mm~0mm；
The switching system I uses head bifurcated funnel A, the straight mouth in top of the head bifurcated funnel A and the double-deck straight line
The outlet of vibrating screen intermediate products is connected, and head bifurcated funnel A lower end thereof bifurcated I passes through transhipment belt conveyor A and product
Feed bin A is connected, and the first electronic liquid slide valve A is equipped on bifurcated I, and other end bifurcated II is equipped with the second electronic liquid slide valve
B；
The switching system II uses head bifurcated funnel B, the straight mouth in top of the head bifurcated funnel B and the double-deck straight line
Products export is connected under Vibration Screen, and head bifurcated funnel B lower end thereof bifurcated III passes through transhipment belt conveyor B and storage
The smelting of 6mm~0mm is connected with powder iron ore concentrate feed bin B, and electronic liquid slide valve C, other end bifurcated are equipped on bifurcated III
IV is equipped with electronic liquid slide valve D.
The two product ore-sorting system of low grade hematite includes being connected with the outlet of the double-deck linear vibrating screen intermediate products
The switching system I connect and the switching system II being connected with the outlet of the double-deck linear vibrating screen undersize, the bifurcated of switching system I
II with fine crushing-closed circuit connection of dry type single-deck screen；The bifurcated IV of the undersize and switching system II of the dry type single-deck screen of 6mm-0
Discharge feeds powder and gathers materials belt conveyor；The gather materials discharge of belt conveyor of powder is fed by one section of closed circuit grinding system-one
Secondary magnetic separation system, a thickness grading hydrocyclone system, a gravity treatment system, two sections of closed circuit grinding systems, secondary thickness grading
The mill that hydrocyclone system, secondary gravity treatment system, secondary magnetic separation system and reverse flotation work system form selects system.
The closed circuit mine system of the primary grinding-is made of one section of ball milling-cyclone group, and the sand setting of one section of cyclone group goes out
Mouth is connect with one section of ball mill to be formed closed circuit, and the overflow outlet of one section of cyclone group passes through the first overflow pipe and a magnetic separation system
It is connected；
Magnetic separation system include a weak magnetic machine, the primary middle magnetomechanical being connect with a weak magnetic tail mine discharge port,
The primary strong magnetomechanical connecting with primary middle magnetomechanical tailing discharge port, the primary strong magnetic connecting with primary strong magnetomechanical tailing discharge port are swept
The elutriation magnetic separator for selecting machine and connecting with a weak magnetic machine concentrate discharge port and primary middle magnetomechanical concentrate discharge port, eluriates magnetic separation
The outlet of tail mine, primary strong magnetomechanical concentrate outlet and primary strong magnetic scavenger concentrate outlet and a thickness grading hydrocyclone system
It is connected, the sand setting of a thickness grading hydrocyclone system is connected with a gravity treatment system.
Gravity treatment system uses a spiral chute reselection, the tailing outlet and two of a spiral chute reselection
Section closed circuit grinding system connection, two sections of closed circuit mine systems of mill are made of two sections of ball millings-cyclone group, two sections of cyclone groups
Sand setting outlet connect with two sections of ball mills to be formed it is closed circuit, the overflow outlet of two sections of cyclone groups pass through the first overflow pipe with it is secondary
Thickness grading system is connected,
The sand setting of secondary thickness grading system is connected with secondary gravity treatment system, the overflow of a thickness grading hydrocyclone system and
The overflow of secondary thickness grading cyclone is connected with secondary magnetic separation system, and the secondary gravity treatment system is slipped using secondary spiral
Slot.
The secondary magnetic separation system is made of secondary middle magnetic separator, secondary intensity magnetic separator, the tailing of secondary middle magnetic separator
Outlet is connected with secondary intensity magnetic separator, and the concentrate outlet of secondary middle magnetic separator concentrate outlet and secondary intensity magnetic separator passes through concentration
Machine is connected with reverse flotation work system is fed.
The reverse flotation work system uses a reverse flotation coarse classifier, a reverse flotation refiner and secondary reverse flotation
Refiner.
The magnetic field strength of weak magnetic separator is 2000GS, and once the magnetic field of middle magnetic separator and secondary middle magnetic separator is strong
Degree is 3500GS, and the magnetic field strength of an intensity magnetic separator is 8000 GS, and the magnetic field strength of primary strong magnetic scavenger is 10000
GS, the magnetic field strength of secondary strong magnetic scavenger are 4000 GS.
Processing high-grade of the invention or low grade hematite produce the ore-dressing technique of four kinds of products, including the broken work of coarse crushing
Industry broken crushing operation in, feature is further including two product sorting operation of high-grade bloodstone, two product of low grade hematite
Sort system job, switching system I and switching system II；
When handling the high-grade raw ore that Iron grade is 55%~60%, the ore of product granularity 150mm~0 is fed after coarse crushing operation
The middle crushing operation system that broken gyratory crusher and the double-deck linear vibrating screen form in, gyratory crusher product feed double-deck straight
Linearly coupled sieve；On the sieve of the double-deck linear vibrating screen+36mm product return in broken gyratory crusher formed it is closed circuit, double-deck screen shale shaker
Granularity is that the intermediate products of 36mm~6mm feed switching system I, opens the first electronic liquid on the bifurcated I of switching system I at this time
Slide valve A, closes the second electronic liquid slide valve B of bifurcated II, and the granularity of double-deck screen shale shaker is the intermediate products of 36mm~6mm
It is 56%-60% smelting block iron ore concentrate I as grade, enters product through transporting belt conveyor A from the bifurcated I of switching system I
Feed bin A is directly used for steelmaking furnace；
The double-deck straight-line oscillation granularity is that the undersize of 6mm~0mm feeds switching system II, at this time the electricity of head bifurcated funnel B
Hydrodynamic slide valve D is closed, and electronic liquid slide valve C is opened, and the double-deck straight-line oscillation granularity is the undersize of 6mm~0mm as product
Position is the smelting powder iron extract mine producation of 56%-60%, enters product through transporting belt conveyor B from the bifurcated III of switching system II
Feed bin B is directly used for steelmaking furnace.
The present invention is when handling the low-grade ore that Iron grade is 35%~55%, product granularity 150mm~0 after coarse crushing operation
Ore feed the middle crushing operation system that in broken gyratory crusher and the double-deck linear vibrating screen form, gyratory crusher product
Feed the double-deck linear vibrating screen；On the sieve of the double-deck linear vibrating screen+36mm product return in broken gyratory crusher formed it is closed circuit.It is double
The intermediate products that the granularity of layer vibrating screen is 36mm~6mm are fed through switching system I by gyratory crusher fine crushing and single layer straight line
The fine crushing operating system of vibrating screen composition ,+36mm product returns to gyratory crusher shape fine crushing on the sieve of the double-deck linear vibrating screen
At closed circuit；
The granularity of double-deck screen shale shaker is that the intermediate products of 36mm~6mm feed switching system I, opens point of switching system I at this time
The second electronic liquid slide valve B on fork II, closes the first electronic liquid slide valve A of bifurcated I, and the granularity of double-deck screen shale shaker is 36mm
The intermediate products of~6mm feed feed belt conveyor fine crushing from the bifurcated II of switching system I, and material is through feed belt fine crushing
It is closed circuit that conveyer feeds fine crushing-dry type single layer screening machine, and+6mm on-the-sieve material returns to type fine disintegrating machine.
The double-deck straight-line oscillation granularity is that the undersize of 6mm~0mm feeds switching system II, at this time head bifurcated funnel B
Electronic liquid slide valve C close, electronic liquid slide valve D is opened, the undersize that the double-deck straight-line oscillation granularity is 6mm~0mm from
Grade after the discharge of bifurcated IV of switching system II merges with the undersize of dry type single-deck screen after the fine crushing of 6mm-0 is 35%-
55% material feeds the powder belt conveyor that gathers materials and enters mill and select system.
Mill selects system by one section of ball milling-- magnetic concentration working of cyclone closed circuit grinding operation, a thickness grading cyclone
Operation, a reselection operation, two sections of ball millings-cyclone closed circuit grinding operation, secondary thickness grading cyclone operation, secondary roughing
Spiral chute operation, secondary magnetic concentration working and reverse flotation work composition are constituted.
Magnetic concentration working includes a low intensity magnetic separation, primary middle magnetic separation, once strong magnetic roughing, primary strong magnetic are scanned
With elutriation magnetic separation, one section of ball milling-cyclone overflow product feeds a low intensity magnetic separation, and a low intensity magnetic separation tailing feeds magnetic in primary
Choosing, primary middle magnetic tailing feed primary strong magnetic roughing, and primary strong magnetic rougher tailings feeds once strong magnetic and scans；Low intensity magnetic separation
Concentrate and primary middle magnetic concentrate feed elutriation magnetic separation, obtain a magnetic concentrate of grade > 62%；
Thickness grading operation uses cyclone group, and a magnetic middling ore feeds a thickness grading cyclone and makees
Industry obtains sand setting and the overflow of a thickness grading cyclone operation；
The sand setting of thickness grading cyclone operation feeds a spiral chute reselection, into a reselection operation, primary weight
The tailing of spiral chute is selected to feed two sections of ball millings-cyclone closed circuit grinding operation, two sections of ball millings-cyclone closed circuit grinding operation
- 0.076mm account for 90% overflow product and feed secondary thickness grading cyclone；The sand setting of secondary thickness grading cyclone is fed
The iron ore concentrate of secondary roughing spiral chute operation, a spiral chute reselection concentrate and secondary roughing spiral chute merges into grade
The gravity treatment iron ore concentrate of > 62%；
The overflow product that -0.043mm of thickness grading cyclone and secondary thickness grading cyclone accounts for 90% feeds two
Secondary middle magnetic concentration working, the secondary magnetic concentration working are made of secondary middle magnetic separator and secondary intensity magnetic separator, secondary middle magnetic separator
Tailing feed secondary intensity magnetic separator, the concentrate of secondary middle magnetic separator and the concentrate of secondary intensity magnetic separator merge into grade 40% ~
45% secondary magnetic concentrate, feeds flotation operation system after secondary magnetic concentrate is concentrated；
It is reverse flotation work that the flotation operation, which is flotation, including one roughing flotation device, primary cleaning flotation device and secondary
Precision sorting flotation machine, the underflow of one roughing flotation device, which is flow automatically, gives primary cleaning flotation device, and the concentrate of primary cleaning flotation device is fed
Recleaning flotation device, the concentrate that the grade of recleaning flotation device is 58.0%~60.0% are final flotation concentrate, primary thick
Flotation froth and twice cleaner flotation foam are flotation tailing.
The magnetic concentrate and gravity concentrate collectively form the pelletizing high grade iron concentrate III of grade > 62%, iron ore concentrate
III filtered powder iron ore concentrate feeds transhipment belt conveyor A through belt conveyor and feeds product feed bin A, directly makes for pelletizing
With；
The low-grade flotation iron ore concentrate that the grade is 58% ~ 60% constitutes sintering iron ore concentrate IV, the filtered powder of iron ore concentrate IV
Iron ore concentrate feeds transhipment belt conveyor B through belt conveyor and feeds product feed bin B, directly uses for sintering；
The primary strong magnetic scans tailing, and secondary strong magnetic scans tailing, secondary spiral chute gravity tailings, the common structure of flotation tailing
At comprehensive tailing.
The invention has the advantages that
1) present invention can produce high-grade piece of iron ore concentrate I and powder through production switch system when head grade is high simultaneously
Iron ore concentrate II can produce pelletizing Iron concentrate III and sintering Iron concentrate IV simultaneously when head grade is low, that is, adapt to not
Demand is sorted with grade raw ore, also achieves the diversification of products scheme, the present invention can produce I He of smelting block iron ore concentrate
Powder iron ore concentrate II, sintering Iron concentrate III and pelletizing Iron concentrate IV, increase the market adaptability of product, have widened product
Sales range.
2) process flow of the invention production pelletizing Iron concentrate and sintering Iron concentrate are obtained using the stage grinding stage
The process of essence, relative to traditional stage grinding stage whipping, process end obtains smart process, and process of the invention is sorting
First section has directly obtained magnetic concentrate using weak magnetic+middle magnetic+elutriation magnetic separation process when grinding particle size is thicker, will be in raw ore
Strongly magnetic mineral has carried out effective recycling if magnetic iron ore is in the first section sorted, micro- when avoiding later period grinding particle size and attenuating
Pollution of the intergrowth of particulate to strongly magnetic mineral obtains the good sorting index of 62% magnetic separation of iron ore concentrate of grade >.This is sorted
Method carries out ultimate upgrading to magnetic concentrate with magnetic separation is eluriated, and the magnetic separation+gravity treatment mixing work for eluriating magnetic separation is adequately utilized
With effective grade that ensure that magnetic concentrate.
3) process flow of the invention is carried out with coarse grain sand setting of the method for gravity treatment to thickness grading after every section of ore grinding
Gravity treatment obtains smart, obtains 62% gravity treatment iron ore concentrate of grade > in the middle section of process by gravity treatment, using coarse grain weight after thickness grading
Choosing not only takes full advantage of spiral chute to the good sorting result of more coarse grained ore particle, it is thus also avoided that microfine intergrowth pair
The quality of gravity concentrate is effectively guaranteed in the pollution of gravity concentrate.
4) -0.043mm is accounted for 90% in the end of process by the overflow sludge of thickness grading twice by technique of the invention
The mineral of microfine all feed secondary middle magnetic+strong magnetic+flotation process of end, ensure that magnetism first with middle magnetic and strong magnetic
The yield of mineral finally carries out whipping to microfine intergrowth with flotation, ensure that the grade of flotation concentrate, be finally obtained product
Position is 58%~60%, and flotation iron ore concentrate realizes the high efficiente callback to microfine sludge.
Detailed description of the invention
Fig. 1 is processing high-grade bloodstone process structure figure of the invention.
Fig. 2 is processing low grade hematite process structure figure of the invention.
Specific embodiment
A specific embodiment of the invention is further illustrated with reference to the accompanying drawing.
As shown in Figure 1, a kind of processing high-grade of the invention or low grade hematite produce the ore-dressing technique of four kinds of products,
Including coarse crushing crusher and in broken crushing system, feature is further including that two product of high-grade bloodstone sorts system, low-grade
Two product of bloodstone sorts system, switching system I and switching system II；
In described broken crushing system include in broken gyratory crusher and broken gyratory crusher is connect in the double-deck straight-line oscillation
Sieve is equipped with oversize outlet, undersize outlet and intermediate products outlet, the double-deck straight-line oscillation on the double-deck linear vibrating screen
Broken crusher is connected to form closed circuit in the oversize return of sieve；
The two product ore-sorting system of high-grade bloodstone includes cutting with what the double-deck linear vibrating screen intermediate products outlet was connected
System I is changed, the transhipment belt conveyor A being connected with switching system I and the smelting block iron ore concentrate for storing 6mm~36mm
Feed bin A, the switching system II being connected with the outlet of the double-deck linear vibrating screen undersize, the transhipment being connected with switching system II
Belt conveyor B and smelting powder iron ore concentrate feed bin B for storing 6mm~0mm；
The switching system I uses head bifurcated funnel A, the straight mouth in top of the head bifurcated funnel A and the double-deck straight line
The outlet of vibrating screen intermediate products is connected, and head bifurcated funnel A lower end thereof bifurcated I passes through transhipment belt conveyor A and product
Feed bin A is connected, and the first electronic liquid slide valve A is equipped on bifurcated I, and other end bifurcated II is equipped with the second electronic liquid slide valve
B；
The switching system II uses head bifurcated funnel B, the straight mouth in top of the head bifurcated funnel B and the double-deck straight line
Products export is connected under Vibration Screen, and head bifurcated funnel B lower end thereof bifurcated III passes through transhipment belt conveyor B and storage
The smelting of 6mm~0mm is connected with powder iron ore concentrate feed bin B, and electronic liquid slide valve C, other end bifurcated are equipped on bifurcated III
IV is equipped with electronic liquid slide valve D.The two product ore-sorting system of low grade hematite include in the double-deck linear vibrating screen
Between the switching system I that is connected of products export and export the switching system II being connected with the double-deck linear vibrating screen undersize,
The bifurcated II of switching system I and fine crushing-closed circuit connection of dry type single-deck screen；The undersize of the dry type single-deck screen of 6mm-0 and switching
IV discharge of bifurcated of system II feeds powder and gathers materials belt conveyor；The gather materials discharge of belt conveyor of powder feeds and is closed by one section
- magnetic separation system of road grinding system, a thickness grading hydrocyclone system, a gravity treatment system, two sections of closed circuit grinding systems,
The mill choosing of secondary thickness grading hydrocyclone system, secondary gravity treatment system, secondary magnetic separation system and reverse flotation work system composition
System.
The closed circuit mine system of the primary grinding-is made of one section of ball milling-cyclone group, and the sand setting of one section of cyclone group goes out
Mouth is connect with one section of ball mill to be formed closed circuit, and the overflow outlet of one section of cyclone group passes through the first overflow pipe and a magnetic separation system
It is connected；
Magnetic separation system include a weak magnetic machine, the primary middle magnetomechanical being connect with a weak magnetic tail mine discharge port,
The primary strong magnetomechanical connecting with primary middle magnetomechanical tailing discharge port, the primary strong magnetic connecting with primary strong magnetomechanical tailing discharge port are swept
The elutriation magnetic separator for selecting machine and connecting with a weak magnetic machine concentrate discharge port and primary middle magnetomechanical concentrate discharge port, eluriates magnetic separation
The outlet of tail mine, primary strong magnetomechanical concentrate outlet and primary strong magnetic scavenger concentrate outlet and a thickness grading hydrocyclone system
It is connected, the sand setting of a thickness grading hydrocyclone system is connected with a gravity treatment system.
The magnetic field strength of weak magnetic separator is 2000GS, and once the magnetic field of middle magnetic separator and secondary middle magnetic separator is strong
Degree is 3500GS, and the magnetic field strength of an intensity magnetic separator is 8000 GS, and the magnetic field strength of primary strong magnetic scavenger is 10000
GS, the magnetic field strength of secondary strong magnetic scavenger are 4000 GS.
Gravity treatment system uses a spiral chute reselection, the tailing outlet and two of a spiral chute reselection
Section closed circuit grinding system connection, two sections of closed circuit mine systems of mill are made of two sections of ball millings-cyclone group, two sections of cyclone groups
Sand setting outlet connect with two sections of ball mills to be formed it is closed circuit, the overflow outlet of two sections of cyclone groups pass through the first overflow pipe with it is secondary
Thickness grading system is connected,
The sand setting of secondary thickness grading system is connected with secondary gravity treatment system, the overflow of a thickness grading hydrocyclone system and
The overflow of secondary thickness grading cyclone is connected with secondary magnetic separation system, and the secondary gravity treatment system is slipped using secondary spiral
Slot.
The secondary magnetic separation system is made of secondary middle magnetic separator, secondary intensity magnetic separator, the tailing of secondary middle magnetic separator
Outlet is connected with secondary intensity magnetic separator, and the concentrate outlet of secondary middle magnetic separator concentrate outlet and secondary intensity magnetic separator passes through concentration
Machine is connected with reverse flotation work system is fed.
The reverse flotation work system uses a reverse flotation coarse classifier, a reverse flotation refiner and secondary reverse flotation
Refiner.
Processing high-grade of the invention or low grade hematite produce the ore-dressing technique of four kinds of products, including coarse crushing crushing operation and
In broken crushing operation, feature is further including that two product sorting operation of high-grade bloodstone, two product of low grade hematite sort
System job, switching system I and switching system II；
As shown in Figure 1, when handling the high-grade raw ore that Iron grade is 55%~60%, product granularity 150mm~0 after coarse crushing operation
Ore feed the middle crushing operation system that in broken gyratory crusher and the double-deck linear vibrating screen form, gyratory crusher product
Feed the double-deck linear vibrating screen；On the sieve of the double-deck linear vibrating screen+36mm product return in broken gyratory crusher formed it is closed circuit, it is double
The intermediate products that the granularity of layer vibrating screen is 36mm~6mm feed switching system I, on the bifurcated I for opening switching system I at this time
First electronic liquid slide valve A, closes the second electronic liquid slide valve B of bifurcated II, and the granularity of double-deck screen shale shaker is 36mm~6mm
Intermediate products as grade be that 56%-60% smelts and uses block iron ore concentrate I, from the bifurcated I of switching system I through transporting belt conveyor
A needs to empty before entering this feed bin block storage iron ore concentrate of product feed bin A(, mixes to avoid with pelletizing with Iron concentrate), directly for smelting
Blast furnace is refined to use；
The double-deck straight-line oscillation granularity is that the undersize of 6mm~0mm feeds switching system II, at this time the electricity of head bifurcated funnel B
Hydrodynamic slide valve D is closed, and electronic liquid slide valve C is opened, and the double-deck straight-line oscillation granularity is the undersize of 6mm~0mm as product
Position is the smelting powder iron extract mine producation of 56%-60%, enters product through transporting belt conveyor B from the bifurcated III of switching system II
Need to empty before this feed bin of feed bin B(storage powder iron ore concentrate, be mixed to avoid with sintering Iron concentrate), directly make for steelmaking furnace
With.
As shown in Fig. 2, the present invention when handle Iron grade be 35%~55% low-grade ore when, product grain after coarse crushing operation
The ore of degree 150mm~0 feeds the middle crushing operation system that broken gyratory crusher and the double-deck linear vibrating screen form in, circular cone
Crusher product feeds the double-deck linear vibrating screen；Broken gyratory crusher in the return of+36mm product on the sieve of the double-deck linear vibrating screen
It is formed closed circuit.The granularity of double-deck screen shale shaker is that the intermediate products of 36mm~6mm are fed through switching system I by gyratory crusher fine crushing
With the fine crushing operating system of single layer linear vibrating screen composition ,+36mm product returns to circle fine crushing on the sieve of the double-deck linear vibrating screen
Conic crusher forms closed circuit；
The granularity of double-deck screen shale shaker is that the intermediate products of 36mm~6mm feed switching system I, opens point of switching system I at this time
The second electronic liquid slide valve B on fork II, closes the first electronic liquid slide valve A of bifurcated I, and the granularity of double-deck screen shale shaker is 36mm
The intermediate products of~6mm feed feed belt conveyor fine crushing from the bifurcated II of switching system I, and material is through feed belt fine crushing
It is closed circuit that conveyer feeds fine crushing-dry type single layer screening machine, and+6mm on-the-sieve material returns to type fine disintegrating machine.
The double-deck straight-line oscillation granularity is that the undersize of 6mm~0mm feeds switching system II, at this time head bifurcated funnel B
Electronic liquid slide valve C close, electronic liquid slide valve D is opened, the undersize that the double-deck straight-line oscillation granularity is 6mm~0mm from
Grade after the discharge of bifurcated IV of switching system II merges with the undersize of dry type single-deck screen after the fine crushing of 6mm-0 is 35%-
55% material feeds the powder belt conveyor that gathers materials and enters mill and select system.
Mill selects system by one section of ball milling-- magnetic concentration working of cyclone closed circuit grinding operation, a thickness grading cyclone
Operation, a reselection operation, two sections of ball millings-cyclone closed circuit grinding operation, secondary thickness grading cyclone operation, secondary roughing
Spiral chute operation, secondary magnetic concentration working and reverse flotation work composition are constituted.
Magnetic concentration working includes a low intensity magnetic separation, primary middle magnetic separation, once strong magnetic roughing, primary strong magnetic are scanned
With elutriation magnetic separation, one section of ball milling-cyclone overflow product feeds a low intensity magnetic separation, the magnetic field strength of a weak magnetic separator
For 2000GS, a low intensity magnetic separation tailing feeds primary middle magnetic separation, and the magnetic field strength of primary middle magnetic separator is 3500GS, primary middle magnetic
Tailing is selected to feed an intensity magnetic separator, the magnetic field strength of an intensity magnetic separator is 8000 GS, and one time intensity magnetic separator tailing feeds one
The magnetic field strength of secondary strong magnetic scavenger, primary strong magnetic scavenger is 10000 GS；Weak magnetic concentrate selection and primary middle magnetic separation essence
Mine feeds elutriation magnetic separation, obtains a magnetic concentrate of grade > 62%；
Thickness grading operation uses cyclone group, and a magnetic middling ore feeds a thickness grading cyclone and makees
Industry obtains sand setting and the overflow of a thickness grading cyclone operation；
The sand setting of thickness grading cyclone operation feeds a spiral chute reselection, into a reselection operation, primary weight
The tailing of spiral chute is selected to feed two sections of ball millings-cyclone closed circuit grinding operation, two sections of ball millings-cyclone closed circuit grinding operation
- 0.076mm account for 90% overflow product and feed secondary thickness grading cyclone；The sand setting of secondary thickness grading cyclone is fed
The iron ore concentrate of secondary roughing spiral chute operation, a spiral chute reselection concentrate and secondary roughing spiral chute merges into grade
The gravity treatment iron ore concentrate of > 62%；
The overflow product that -0.043mm of thickness grading cyclone and secondary thickness grading cyclone accounts for 90% feeds two
Secondary middle magnetic concentration working, the secondary magnetic concentration working are made of secondary middle magnetic separator and secondary intensity magnetic separator, secondary middle magnetic separator
Magnetic field strength be 3500GS, the tailing of secondary middle magnetic separator feeds secondary strong magnetic scavenger, and the magnetic field of secondary intensity magnetic separator is strong
Spending is 4000 GS, and the concentrate of the concentrate of secondary middle magnetic separator and secondary strong magnetic scavenger merges into the secondary magnetic of grade 40% ~ 45%
Concentrate selection feeds flotation operation system after secondary magnetic concentrate is concentrated；
It is reverse flotation work that the flotation operation, which is flotation, including one roughing flotation device, primary cleaning flotation device and secondary
Precision sorting flotation machine, the underflow of one roughing flotation device, which is flow automatically, gives primary cleaning flotation device, and the concentrate of primary cleaning flotation device is fed
Recleaning flotation device, the concentrate that the grade of recleaning flotation device is 58.0%~60.0% are final flotation concentrate, primary thick
Flotation froth and twice cleaner flotation foam are flotation tailing.
The magnetic concentrate and gravity concentrate collectively form the pelletizing high grade iron concentrate III of grade > 62%, iron ore concentrate
III filtered powder iron ore concentrate feeds transhipment belt conveyor A through belt conveyor and feeds product feed bin A, directly makes for pelletizing
With；
The low-grade flotation iron ore concentrate that the grade is 58% ~ 60% constitutes sintering iron ore concentrate IV, the filtered powder of iron ore concentrate IV
Iron ore concentrate feeds transhipment belt conveyor B through belt conveyor and feeds product feed bin B, directly uses for sintering；
The primary strong magnetic scans tailing, and secondary strong magnetic scans tailing, secondary spiral chute gravity tailings, the common structure of flotation tailing
At comprehensive tailing.
Technique of the invention in the end of process by the overflow sludge of thickness grading twice, by -0.043mm account for 90% it is micro-
The mineral of particulate all feed secondary middle magnetic+strong magnetic+flotation process of end, ensure that magnetic mine first with middle magnetic and strong magnetic
The yield of object finally carries out whipping to microfine intergrowth with flotation, ensure that the grade of flotation concentrate, be finally obtained grade
It is 58%~60%, flotation iron ore concentrate realizes the high efficiente callback to microfine sludge.
Claims (10)
1. the ore-dressing technique of a kind of processing high-grade or low grade hematite four kinds of products of production, including coarse crushing crusher are broken in
Crushing system, feature further include two product of high-grade bloodstone sorts system, two product of low grade hematite sorts system,
Switching system I and switching system II；
In described broken crushing system include in broken gyratory crusher and broken gyratory crusher is connect in the double-deck straight-line oscillation
Sieve is equipped with oversize outlet, undersize outlet and intermediate products outlet, the double-deck straight-line oscillation on the double-deck linear vibrating screen
Broken crusher is connected to form closed circuit in the oversize return of sieve；
The two product ore-sorting system of high-grade bloodstone includes cutting with what the double-deck linear vibrating screen intermediate products outlet was connected
System I is changed, the transhipment belt conveyor A being connected with switching system I and the smelting block iron ore concentrate for storing 6mm~36mm
Feed bin A, the switching system II being connected with the outlet of the double-deck linear vibrating screen undersize, the transhipment being connected with switching system II
Belt conveyor B and smelting powder iron ore concentrate feed bin B for storing 6mm~0mm；
The switching system I uses head bifurcated funnel A, the straight mouth in top of the head bifurcated funnel A and the double-deck straight line
The outlet of vibrating screen intermediate products is connected, and head bifurcated funnel A lower end thereof bifurcated I passes through transhipment belt conveyor A and product
Feed bin A is connected, and the first electronic liquid slide valve A is equipped on bifurcated I, and other end bifurcated II is equipped with the second electronic liquid slide valve
B；
The switching system II uses head bifurcated funnel B, the straight mouth in top of the head bifurcated funnel B and the double-deck straight line
Products export is connected under Vibration Screen, and head bifurcated funnel B lower end thereof bifurcated III passes through transhipment belt conveyor B and storage
The smelting of 6mm~0mm is connected with powder iron ore concentrate feed bin B, and electronic liquid slide valve C, other end bifurcated are equipped on bifurcated III
IV is equipped with electronic liquid slide valve D；
The two product ore-sorting system of low grade hematite includes being connected with the double-deck linear vibrating screen intermediate products outlet
Switching system I and export the switching system II that is connected with the double-deck linear vibrating screen undersize, the bifurcated II of switching system I with
Fine crushing-closed circuit connection of dry type single-deck screen；The discharge of the bifurcated IV of the undersize and switching system II of the dry type single-deck screen of 6mm-0
Powder is fed to gather materials belt conveyor；The gather materials discharge of belt conveyor of powder is fed by-magnetic of one section of closed circuit grinding system
Select system, a thickness grading hydrocyclone system, a gravity treatment system, two sections of closed circuit grinding systems, secondary thickness grading eddy flow
The mill that device system, secondary gravity treatment system, secondary magnetic separation system and reverse flotation work system form selects system.
2. processing high-grade according to claim 1 or low grade hematite produce the ore-dressing technique of four kinds of products, special
Sign is that the closed circuit mine system of the primary grinding-is made of one section of ball milling-cyclone group, and the sand setting of one section of cyclone group goes out
Mouth is connect with one section of ball mill to be formed closed circuit, and the overflow outlet of one section of cyclone group passes through the first overflow pipe and a magnetic separation system
It is connected；
Magnetic separation system include a weak magnetic machine, the primary middle magnetomechanical being connect with a weak magnetic tail mine discharge port,
The primary strong magnetomechanical connecting with primary middle magnetomechanical tailing discharge port, the primary strong magnetic connecting with primary strong magnetomechanical tailing discharge port are swept
The elutriation magnetic separator for selecting machine and connecting with a weak magnetic machine concentrate discharge port and primary middle magnetomechanical concentrate discharge port, eluriates magnetic separation
The outlet of tail mine, primary strong magnetomechanical concentrate outlet and primary strong magnetic scavenger concentrate outlet and a thickness grading hydrocyclone system
It is connected, the sand setting of a thickness grading hydrocyclone system is connected with a gravity treatment system.
3. handling high-grade or low grade hematite producing the ore-dressing technique of four kinds of products, which is characterized in that the primary weight
Select system using a spiral chute reselection, the tailing outlet of a spiral chute reselection is connect with two sections of closed circuit grinding systems,
Two sections of closed circuit mine systems of mill are made of two sections of ball millings-cyclone group, sand setting outlet and the two sections of balls of two sections of cyclone groups
Grinding machine, which connects, to be formed closed circuit, and the overflow outlet of two sections of cyclone groups is connected by the first overflow pipe with secondary thickness grading system
It connects,
The sand setting of secondary thickness grading system is connected with secondary gravity treatment system, the overflow of a thickness grading hydrocyclone system and
The overflow of secondary thickness grading cyclone is connected with secondary magnetic separation system, and the secondary gravity treatment system is slipped using secondary spiral
Slot.
4. processing high-grade according to claim 1 or low grade hematite produce the ore-dressing technique of four kinds of products, special
Sign is that the secondary magnetic separation system is made of secondary middle magnetic separator, secondary intensity magnetic separator, and the tailing of secondary middle magnetic separator goes out
Mouth is connected with secondary intensity magnetic separator, and the concentrate outlet of secondary middle magnetic separator concentrate outlet and secondary intensity magnetic separator passes through thickener
It is connected with reverse flotation work system is fed.
5. processing high-grade according to claim 1 or low grade hematite produce the ore-dressing technique of four kinds of products, special
Sign is that the reverse flotation work system uses a reverse flotation coarse classifier, a reverse flotation refiner and secondary reverse flotation
Refiner.
6. processing high-grade according to claim 2 or 4 or low grade hematite produce the ore-dressing technique of four kinds of products,
It is characterized in that, the magnetic field strength of a weak magnetic separator is 2000GS, the magnetic field of primary middle magnetic separator and secondary middle magnetic separator
Intensity is 3500GS, and the magnetic field strength of an intensity magnetic separator is 8000 GS, and the magnetic field strength of primary strong magnetic scavenger is 10000
GS, the magnetic field strength of secondary strong magnetic scavenger are 4000 GS.
7. a kind of ore-dressing technique that four kinds of products are produced using processing high-grade described in claim 1 or low grade hematite,
Including coarse crushing crushing operation and in broken crushing operation, feature is further including two product sorting operation of high-grade bloodstone, low product
Position two product of bloodstone sorts system job, switching system I and switching system II；
When handling the high-grade raw ore that Iron grade is 55%~60%, the ore of product granularity 150mm~0 is fed after coarse crushing operation
The middle crushing operation system that broken gyratory crusher and the double-deck linear vibrating screen form in, gyratory crusher product feed double-deck straight
Linearly coupled sieve；On the sieve of the double-deck linear vibrating screen+36mm product return in broken gyratory crusher formed it is closed circuit, double-deck screen shale shaker
Granularity is that the intermediate products of 36mm~6mm feed switching system I, opens the first electronic liquid on the bifurcated I of switching system I at this time
Slide valve A, closes the second electronic liquid slide valve B of bifurcated II, and the granularity of double-deck screen shale shaker is the intermediate products of 36mm~6mm
It is 56%-60% smelting block iron ore concentrate as grade, enters product material through transporting belt conveyor A from the bifurcated I of switching system I
Need to empty before this feed bin block storage iron ore concentrate of storehouse A(, be mixed to avoid with pelletizing with Iron concentrate), directly used for steelmaking furnace；
The double-deck straight-line oscillation granularity is that the undersize of 6mm~0mm feeds switching system II, at this time the electricity of head bifurcated funnel B
Hydrodynamic slide valve D is closed, and electronic liquid slide valve C is opened, and the double-deck straight-line oscillation granularity is the undersize of 6mm~0mm as product
Position is the smelting powder iron extract mine producation of 56%-60%, enters product through transporting belt conveyor B from the bifurcated III of switching system II
Need to empty before this feed bin of feed bin B(storage powder iron ore concentrate, be mixed to avoid with sintering Iron concentrate), directly make for steelmaking furnace
With.
8. a kind of processing high-grade or low grade hematite produce the ore-dressing technique of four kinds of products, including coarse crushing crushing operation is in
Broken crushing operation, feature are further including that two product sorting operation of high-grade bloodstone, two product of low grade hematite sort and be
System operation, switching system I and switching system II；
When handling the low-grade ore that Iron grade is 35%~55%, the ore of product granularity 150mm~0 is fed after coarse crushing operation
The middle crushing operation system that broken gyratory crusher and the double-deck linear vibrating screen form in, gyratory crusher product feed double-deck straight
Linearly coupled sieve；On the sieve of the double-deck linear vibrating screen+36mm product return in broken gyratory crusher formed it is closed circuit, double-deck screen shale shaker
Granularity feeds through switching system I for the intermediate products of 36mm~6mm and is made of gyratory crusher fine crushing and single layer linear vibrating screen
Fine crushing operating system, on the sieve of the double-deck linear vibrating screen+36mm product return gyratory crusher fine crushing formed it is closed circuit；
The granularity of double-deck screen shale shaker is that the intermediate products of 36mm~6mm feed switching system I, opens point of switching system I at this time
The second electronic liquid slide valve B on fork II, closes the first electronic liquid slide valve A of bifurcated I, and the granularity of double-deck screen shale shaker is 36mm
The intermediate products of~6mm feed feed belt conveyor fine crushing from the bifurcated II of switching system I, and material is through feed belt fine crushing
It is closed circuit that conveyer feeds fine crushing-dry type single layer screening machine, and+6mm on-the-sieve material returns to type fine disintegrating machine；
The double-deck straight-line oscillation granularity is that the undersize of 6mm~0mm feeds switching system II, at this time the electricity of head bifurcated funnel B
Hydrodynamic slide valve C is closed, and electronic liquid slide valve D is opened, and the undersize that the double-deck straight-line oscillation granularity is 6mm~0mm is from switching
Grade after the discharge of bifurcated IV of system II merges with the undersize of dry type single-deck screen after the fine crushing of 6mm-0 is 35%-55%
Material feed the powder belt conveyor that gathers materials and enter mill and select system；
Mill selects system to be made by one section of ball milling-- magnetic concentration working of cyclone closed circuit grinding operation, a thickness grading cyclone
Industry, a reselection operation, two sections of ball millings-cyclone closed circuit grinding operation, secondary thickness grading cyclone operation, secondary roughing spiral shell
Chute operation, secondary magnetic concentration working and reverse flotation work composition is revolved to constitute.
9. processing high-grade according to claim 7 or 8 or low grade hematite produce the ore-dressing technique of four kinds of products,
It is characterized in that a magnetic concentration working includes a low intensity magnetic separation, primary middle magnetic separation, once strong magnetic roughing, primary strong magnetic are scanned
With elutriation magnetic separation, one section of ball milling-cyclone overflow product feeds a low intensity magnetic separation, and a low intensity magnetic separation tailing feeds magnetic in primary
Choosing, primary middle magnetic tailing feed primary strong magnetic roughing, and primary strong magnetic rougher tailings feeds once strong magnetic and scans；Low intensity magnetic separation
Concentrate and primary middle magnetic concentrate feed elutriation magnetic separation, obtain the magnetic concentrate of grade > 62%；
Thickness grading operation uses cyclone group, and a magnetic middling ore feeds a thickness grading cyclone and makees
Industry obtains sand setting and the overflow of a thickness grading cyclone operation；
The sand setting of thickness grading cyclone operation feeds a spiral chute reselection into a reselection operation, a gravity treatment
The tailing of spiral chute feeds two sections of ball millings-cyclone closed circuit grinding operation, two sections of ball millings-cyclone closed circuit grinding operation-
The overflow product that 0.076mm accounts for 90% feeds secondary thickness grading cyclone；The sand setting of secondary thickness grading cyclone feeds secondary
The iron ore concentrate of roughing spiral chute operation, a spiral chute reselection concentrate and secondary roughing spiral chute merges into grade >
62% gravity treatment iron ore concentrate；
The overflow product that -0.043mm of thickness grading cyclone and secondary thickness grading cyclone accounts for 90% feeds two
Secondary middle magnetic concentration working, the secondary magnetic concentration working are made of secondary middle magnetic separator and secondary intensity magnetic separator, secondary middle magnetic separator
Tailing feed secondary intensity magnetic separator, the concentrate of secondary middle magnetic separator and the concentrate of secondary intensity magnetic separator merge into grade 40% ~
45% secondary magnetic concentrate, feeds flotation operation system after secondary magnetic concentrate is concentrated；
It is reverse flotation work that the flotation operation, which is flotation, including one roughing flotation device, primary cleaning flotation device and secondary
Precision sorting flotation machine, the underflow of one roughing flotation device, which is flow automatically, gives primary cleaning flotation device, and the concentrate of primary cleaning flotation device is fed
Recleaning flotation device, the concentrate that the grade of recleaning flotation device is 58.0%~60.0% are final flotation concentrate, primary thick
Flotation froth and twice cleaner flotation foam are flotation tailing.
10. the magnetic concentrate and gravity concentrate collectively form the pelletizing high grade iron concentrate III of grade > 62%, iron ore concentrate III
Filtered powder iron ore concentrate feeds transhipment belt conveyor A through belt conveyor and feeds product feed bin A, directly uses for pelletizing；
The low-grade flotation iron ore concentrate that the grade is 58% ~ 60% constitutes sintering iron ore concentrate IV, the filtered powder of iron ore concentrate IV
Iron ore concentrate feeds transhipment belt conveyor B through belt conveyor and feeds product feed bin B, directly uses for sintering；
The primary strong magnetic scans tailing, and secondary strong magnetic scans tailing, secondary spiral chute gravity tailings, the common structure of flotation tailing
At comprehensive tailing.
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| CN201811013597.8A CN109127112A (en) | 2018-08-31 | 2018-08-31 | A kind of ore-dressing technique handling high-grade or low grade hematite four kinds of products of production |
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| CN201811013597.8A CN109127112A (en) | 2018-08-31 | 2018-08-31 | A kind of ore-dressing technique handling high-grade or low grade hematite four kinds of products of production |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109675712A (en) * | 2019-01-08 | 2019-04-26 | 中冶北方（大连）工程技术有限公司 | A kind of processing high-sulfur is red-ore-dressing technique of magnetic compound iron ore |
| CN109692752A (en) * | 2019-01-08 | 2019-04-30 | 中冶北方（大连）工程技术有限公司 | It is a kind of to handle the ore-dressing technique that compound iron ore is selected containing a variety of iron mineral difficulties |
| CN109939815A (en) * | 2019-03-29 | 2019-06-28 | 中冶北方（大连）工程技术有限公司 | Two product ore-dressing technique of vanadium titano-magnetite |
| CN112844813A (en) * | 2021-02-02 | 2021-05-28 | 鑫选(厦门)矿冶科技有限公司 | Iron ore dressing system and electronic device |
| CN112845524A (en) * | 2021-01-04 | 2021-05-28 | 包头钢铁（集团）有限责任公司 | Comprehensive utilization method of iron ore solid waste |
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2018
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109675712A (en) * | 2019-01-08 | 2019-04-26 | 中冶北方（大连）工程技术有限公司 | A kind of processing high-sulfur is red-ore-dressing technique of magnetic compound iron ore |
| CN109692752A (en) * | 2019-01-08 | 2019-04-30 | 中冶北方（大连）工程技术有限公司 | It is a kind of to handle the ore-dressing technique that compound iron ore is selected containing a variety of iron mineral difficulties |
| CN109692752B (en) * | 2019-01-08 | 2020-07-28 | 中冶北方（大连）工程技术有限公司 | Mineral processing technology for processing refractory mixed iron ore containing multiple iron minerals |
| CN109939815A (en) * | 2019-03-29 | 2019-06-28 | 中冶北方（大连）工程技术有限公司 | Two product ore-dressing technique of vanadium titano-magnetite |
| CN109939815B (en) * | 2019-03-29 | 2020-10-16 | 中冶北方（大连）工程技术有限公司 | Mineral separation process for two products of vanadium titano-magnetite |
| CN112845524A (en) * | 2021-01-04 | 2021-05-28 | 包头钢铁（集团）有限责任公司 | Comprehensive utilization method of iron ore solid waste |
| CN112845524B (en) * | 2021-01-04 | 2023-02-21 | 包头钢铁（集团）有限责任公司 | Comprehensive utilization method of iron ore solid waste |
| CN112844813A (en) * | 2021-02-02 | 2021-05-28 | 鑫选(厦门)矿冶科技有限公司 | Iron ore dressing system and electronic device |
| CN112844813B (en) * | 2021-02-02 | 2022-12-09 | 鑫选(厦门)矿冶科技有限公司 | Iron ore dressing system and electronic device |
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