EP2125229B1 - Air separator for comminuted materials - Google Patents
Air separator for comminuted materials Download PDFInfo
- Publication number
- EP2125229B1 EP2125229B1 EP08705553.9A EP08705553A EP2125229B1 EP 2125229 B1 EP2125229 B1 EP 2125229B1 EP 08705553 A EP08705553 A EP 08705553A EP 2125229 B1 EP2125229 B1 EP 2125229B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- concentric
- vessel
- rotor
- outlet
- sidewall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
Links
- 239000000463 material Substances 0.000 title claims description 99
- 239000002245 particle Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims 5
- 239000000047 product Substances 0.000 description 16
- 239000004568 cement Substances 0.000 description 6
- 239000012467 final product Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000011236 particulate material Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B4/00—Separating solids from solids by subjecting their mixture to gas currents
- B07B4/02—Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
- B07B7/083—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by rotating vanes, discs, drums, or brushes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B7/00—Selective separation of solid materials carried by, or dispersed in, gas currents
- B07B7/08—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force
- B07B7/086—Selective separation of solid materials carried by, or dispersed in, gas currents using centrifugal force generated by the winding course of the gas stream
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
- B07B9/02—Combinations of similar or different apparatus for separating solids from solids using gas currents
Definitions
- the present invention relates to air separators according to the preamble of claim 1, in particular for use in conjunction with comminution equipment, such as high pressure roll presses and ball mills and to a method of segregating comminuted material for further processing.
- High pressure roll presses have been used in cement processing with ball mills to increase throughput capacity and decrease the total energy expenditure in cement processing. These roll presses typically are the first stage in clinker grinding processing, and processing of other materials, with product from the press being directed to a ball mill or other machinery for further processing.
- an air separator has been used in conjunction with other grinding and comminution devices to improve separating and grinding efficiency.
- Comminuted material is introduced into a cyclonic vessel. Larger material falls to the bottom of the vessel and is removed via an exit port for further processing. Material fines suitable for use as a final product are removed from the comminuted material within the cyclonic vessel by vortical wind currents created by a fan. A slight vacuum is then typically employed to remove the fines from the cyclonic vessel from a second exit port typically at the top of the vessel or along the sides thereof, so as not to commingle the fines with the larger material exiting from the bottom exit port.
- An air separator according to the preamble of claim 1 is known from EP 0 492 062 A1 .
- This air separator has three concentric vessels, each being partially conical and each having an outlet.
- One of these vessels has a material inlet arranged on the top of a housing and at least one air inlet being tangentially aligned.
- a rotary shaft is extending through an upper surface concentric with an inner surface and being connected to a rotor concentric with said inner surface.
- US 1,735,479 A shows a similar air separator having three concentric vessels each having an outlet.
- a rotor being attached to a rotory shaft and a material inlet arranged at the top of a housing.
- US 3,490,702 A discloses a method of accelerating production of Portland cement and similar material having an air separator, a ball mill and a crusher.
- U.S. Patent No. 6,889, 843 discloses an air separator for particulate material. Particles of various sizes are introduced to a separating zone through which a gas stream flows at such volume and velocity as to entrain fine particles and convey them from the separating zone to grinding or other facilities. The fineness of entrained particles may be adjusted by diverting a selected portion of the gas stream from the separating zone to a bypass passageway followed by recombining the diverted portion of such gas stream with the gas containing the entrained particles.
- Kimmeyer et al. U.S. Patent No. 6,644,479 discloses an air separator for comminuted material having a sifting rotor. Air and comminuted material are introduced into a sifting chamber and blocking air is blown into a ring seal region in the transition region between the sifting rotor and a stationary withdrawal duct. Particle size distribution range in the fine material/end product is controlled by discharging fine material through a bypass stream. By controlling the supply of blocking air, the volume of the bypass stream can be changed, thereby regulating the size of the separated material.
- U.S. Patent No. 6,631,808 discloses an air classifier with enhanced air flow which maybe used for the simultaneous recovery of two or more distinct grades of foundry quality sand from a single sand stream.
- the air classifier draws incoming air into the classification chamber through a honeycomb followed by a screen section having two or more screens, a vibrating screen feeder for spreading the incoming particle stream before entrainment in the air flow within the classifier can also be included.
- Fischer-Helwig et al. U. S. Patent No. 5,158,182 discloses a rotary separator for separating different fractions of particulate material. Material and air pass inwardly through a cylindrical outer housing and three rotary cages. Channels below the rotors collect the separate fractions of separated material.
- Blasczyk et al. U.S. Patent No. 4,792,393 discloses an air separator in which the spiral for delivery of the air for sifting is divided into a plurality of channels.
- the channels lie one above another and the quantity of air delivered to the individual channels can be adjusted.
- the degree of separation can be optimized by adjustably controlling air flow to each of the plurality of chambers.
- the present invention provides various embodiments of a cyclonic air separator for the use in conjunction with the compressive comminution of granular material, including cement clinker.
- the invention provides an air separator having a plurality of concentric vessels.
- a spiral inlet housing, thimble, guide vanes, and rotor are provided atop the vessels to provide vortical wind currents within the vessels, and segregates feed material into the various vessels based on particle size.
- the invention further provides that separated feed material is withdrawn from one of a plurality of vessel exit ports, or discharge outlets, for use as a final product.
- the invention further provides that comminuted material can be introduced into the air separator at a plurality of entrance ports, based on the size of the particles, and the comminution processes already undergone.
- air separator 10 includes a rotor 12 centrally positioned inside a corresponding rotor housing 14 about a vertical axis.
- a rotary shaft 16 extends through the rotor housing 14 and is attached to the rotor 12 along a common concentric vertical axis.
- the rotor 12 is supported within the rotor housing 14, so that it rotates freely within the housing 14 around the vertical, shaft-defined axis.
- the rotor 12 itself is a drum or fan designed to let air and small particles pass vortically inward to the interior of the drum.
- the rotor 12 is typically comprised of vertically extending rotor vanes 18 supported by at least an annular upper vane support 20, and preferably also by a lower annular vane support 22.
- the rotor vanes 18 are mounted between the upper supports 20 and lower supports 22 and are fixed into position.
- the rotor vanes 18 direct air and comminuted material into the interior of the rotor drum 12.
- the rotational velocity of the rotor 12 can be altered to control the size of the particles that are allowed to pass into the rotor 12.
- the rotor housing 14 defines a substantially hollow cylindrical cavity wherein pre-separated material can be acted on by vortical forces created by the rotor and the rotor vanes 18.
- a secondary material feed 24 is located above the rotor 12, preferably concentric with the rotary shaft 16, and extending through the surface of the rotor housing 14.
- Material from the secondary material feed 24 is fed directly to the rotor 12, preferably from a ball mill or other type mill capable of fine-grinding the comminuted material.
- Material from the secondary material feed 24 is of a sufficiently small size and dimension that it will not harm the rotor 12 or the rotor vanes 18 when fed into the rotor housing 14. It is preferable that material entering the secondary material feed 24 is of a size and dimension that would normally be carried by the vortical forces in the rotor housing 14. That is, material from the secondary feed 24 is preferably small enough to be carried by the wind currents inside the rotor housing 14.
- the product duct 26 Situated directly beneath the rotor 12 is the product duct 26. Comminuted material that is fine enough to be drawn into the rotor 12 is conducted into the product duct 26, and out of the air separator 10 through a product exit port 28. The product exit port 28 can then be connected to other machinery for settling the comminuted product from the conveying air.
- the product duct 26 is comprised of two regions, the upper cylindrical portion 30 located proximate to the rotor 12, and the lower frusto-conical portion 32, located distal from the rotor 12. This profile allows for the maintenance of sufficient velocities within the product duct 26.
- the product exit port 28 is provided with a slight vacuum, such that air within the air separator 10 is drawn out through the product exit port 28. This ensures the prompt removal of finely comminuted material from the air separator 10.
- the fine rejects vessel 36 is positioned generally concentrically around the product vessel or duct 26, with the product discharge outlet or exit port 28 extending therethrough. Similar to the product vessel 26, the fine rejects vessel 36 is comprised of an upper cylindrical portion 38, and a lower frusto-conical portion 40. The upper edge of the upper portion 38 is generally coplanar with the intersection of the product vessel 26 and the rotor 12. The plurality of guide vanes 34 are connected to and extend from the top of the upper portion 38 and are also connected to the rotor housing 14.
- Material collected into the fine rejects vessel 36 is directed out of the air separator 10 through discharge outlet or exit 42. Material from the exit 42 can then be redirected to a ball mill grinder for further processing, and eventual reintroduction to the air separator 10 through the secondary material feed 24.
- a final coarse rejects vessel 44 is concentrically located around the fine rejects vessel 36, with both the product exit 28 and the fine rejects exit port 42 extending there through.
- the coarse rejects vessel 44 is comprised of an upper cylindrical portion 46, and a lower frusto-conical portion 48, similar to the fine rejects vessel 36.
- the annularly defined space 52 between the upper portion 38 of the fine rejects vessel 36 and the upper portion 46 of final coarse rejects vessel 44 allow for air flow from that annular space 52 upward through the plurality of guide vanes 34, and into the rotor 12.
- a primary material feed 56 Integrally and tangentially attached to the coarse rejects vessel is a primary material feed 56.
- the primary material feed 56 functions both as an air inlet and for introduction of coarsely comminuted feed material.
- Feed material entering the air separator 10 at the primary material feed 56 is typically material that has been passed through a first stage comminution device, such as a high pressure roll press.
- the feed 56 is a spiral inlet, preferably having a 180° twist. Air entering the separator 10 at the primary material feed 56 creates a flow that can carry fine particles upward into the rotor housing 14 and rotor 12 for segregation between the product vessel 26 and fine rejects vessel 36. Material from the primary material feed 56 that is too heavy for transport into the rotor housing 14 is separated out of the air separator 10 into the coarse rejects vessel 44, and is discharged at the coarse rejects discharge outlet or exit 50, for further comminution.
- the air separator is provided with a plurality of concentric, partially conical vessels.
- a rotor is provided atop the vessels to provide vortical wind currents within the vessels, and segregates feed material into the various vessels based on particle size. Separated feed material is withdrawn from one of a plurality of vessel exit ports for use as a final product. Withdrawn comminuted material can be reintroduced into the air separator at one of a plurality of entrance ports, based on either or both of the size of the particles, and the comminution processes already undergone.
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Combined Means For Separation Of Solids (AREA)
Description
- The present invention relates to air separators according to the preamble of claim 1, in particular for use in conjunction with comminution equipment, such as high pressure roll presses and ball mills and to a method of segregating comminuted material for further processing.
- High pressure roll presses have been used in cement processing with ball mills to increase throughput capacity and decrease the total energy expenditure in cement processing. These roll presses typically are the first stage in clinker grinding processing, and processing of other materials, with product from the press being directed to a ball mill or other machinery for further processing.
- Typically in comminution processes for cement and other abrasive materials, an air separator has been used in conjunction with other grinding and comminution devices to improve separating and grinding efficiency. Comminuted material is introduced into a cyclonic vessel. Larger material falls to the bottom of the vessel and is removed via an exit port for further processing. Material fines suitable for use as a final product are removed from the comminuted material within the cyclonic vessel by vortical wind currents created by a fan. A slight vacuum is then typically employed to remove the fines from the cyclonic vessel from a second exit port typically at the top of the vessel or along the sides thereof, so as not to commingle the fines with the larger material exiting from the bottom exit port.
- An air separator according to the preamble of claim 1 is known from
EP 0 492 062 A1 . This air separator has three concentric vessels, each being partially conical and each having an outlet. One of these vessels has a material inlet arranged on the top of a housing and at least one air inlet being tangentially aligned. A rotary shaft is extending through an upper surface concentric with an inner surface and being connected to a rotor concentric with said inner surface. -
US 1,735,479 A shows a similar air separator having three concentric vessels each having an outlet. A rotor being attached to a rotory shaft and a material inlet arranged at the top of a housing. -
US 3,490,702 A discloses a method of accelerating production of Portland cement and similar material having an air separator, a ball mill and a crusher. -
Longhurst et al. U.S. Patent No. 6,889, 843 discloses an air separator for particulate material. Particles of various sizes are introduced to a separating zone through which a gas stream flows at such volume and velocity as to entrain fine particles and convey them from the separating zone to grinding or other facilities. The fineness of entrained particles may be adjusted by diverting a selected portion of the gas stream from the separating zone to a bypass passageway followed by recombining the diverted portion of such gas stream with the gas containing the entrained particles. -
Kimmeyer et al. U.S. Patent No. 6,644,479 discloses an air separator for comminuted material having a sifting rotor. Air and comminuted material are introduced into a sifting chamber and blocking air is blown into a ring seal region in the transition region between the sifting rotor and a stationary withdrawal duct. Particle size distribution range in the fine material/end product is controlled by discharging fine material through a bypass stream. By controlling the supply of blocking air, the volume of the bypass stream can be changed, thereby regulating the size of the separated material. -
Sparks et al. U.S. Patent No. 6,631,808 discloses an air classifier with enhanced air flow which maybe used for the simultaneous recovery of two or more distinct grades of foundry quality sand from a single sand stream. The air classifier draws incoming air into the classification chamber through a honeycomb followed by a screen section having two or more screens, a vibrating screen feeder for spreading the incoming particle stream before entrainment in the air flow within the classifier can also be included. -
Fischer-Helwig et al. U. S. Patent No. 5,158,182 discloses a rotary separator for separating different fractions of particulate material. Material and air pass inwardly through a cylindrical outer housing and three rotary cages. Channels below the rotors collect the separate fractions of separated material. -
Blasczyk et al. U.S. Patent No. 4,792,393 discloses an air separator in which the spiral for delivery of the air for sifting is divided into a plurality of channels. The channels lie one above another and the quantity of air delivered to the individual channels can be adjusted. The degree of separation can be optimized by adjustably controlling air flow to each of the plurality of chambers. - The present invention provides various embodiments of a cyclonic air separator for the use in conjunction with the compressive comminution of granular material, including cement clinker.
- The invention provides an air separator having a plurality of concentric vessels. A spiral inlet housing, thimble, guide vanes, and rotor are provided atop the vessels to provide vortical wind currents within the vessels, and segregates feed material into the various vessels based on particle size.
- The invention further provides that separated feed material is withdrawn from one of a plurality of vessel exit ports, or discharge outlets, for use as a final product.
- The invention further provides that comminuted material can be introduced into the air separator at a plurality of entrance ports, based on the size of the particles, and the comminution processes already undergone.
- The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of the disclosure. For a better understanding of the invention, its operating advantages, and specific objects attained by its use, reference should be made to the drawings and descriptive matter in which there is illustrated and described a preferred embodiment of the invention.
- It is the primary object of the invention to provide an improved cyclonic air separator for use in conjunction with the compressive comminution of granular material, including cement clinker.
- It is another object of the invention to provide a cyclonic air separator having a plurality of generally concentric vessels, wherein vortical wind currents within the vessels separate feed material into the various vessels based on particle size.
- It is a further object of the invention to provide a cyclonic air separator having a plurality of generally concentric vessels, wherein separated feed material is withdrawn from a plurality of vessel exit ports and can be reintroduced into the air separator at a plurality of entrance ports after further processing.
- The foregoing and other objects and advantages of the present invention are better understood with reference to the following detailed description of the invention and the accompanying drawings, in which:
-
FIG. 1 is a vertical cross-sectional view of the invented air separator. -
FIG. 2 is an isometric view of the rotor for use in the air separator ofFIG. 1 . -
FIG. 3 is a horizontal cross-sectional view of the rotor ofFIG. 2 . - Referring now to
Figure 1 ,air separator 10 includes arotor 12 centrally positioned inside acorresponding rotor housing 14 about a vertical axis. Arotary shaft 16 extends through therotor housing 14 and is attached to therotor 12 along a common concentric vertical axis. Therotor 12 is supported within therotor housing 14, so that it rotates freely within thehousing 14 around the vertical, shaft-defined axis. - As shown in
Figure 2 , therotor 12 itself is a drum or fan designed to let air and small particles pass vortically inward to the interior of the drum. Thus, therotor 12 is typically comprised of vertically extendingrotor vanes 18 supported by at least an annularupper vane support 20, and preferably also by a lowerannular vane support 22. Therotor vanes 18 are mounted between theupper supports 20 andlower supports 22 and are fixed into position. Upon rotation of therotor 12, the rotor vanes 18 direct air and comminuted material into the interior of therotor drum 12. - The rotational velocity of the
rotor 12 can be altered to control the size of the particles that are allowed to pass into therotor 12. Therotor housing 14 defines a substantially hollow cylindrical cavity wherein pre-separated material can be acted on by vortical forces created by the rotor and therotor vanes 18. - A
secondary material feed 24 is located above therotor 12, preferably concentric with therotary shaft 16, and extending through the surface of therotor housing 14. Material from thesecondary material feed 24 is fed directly to therotor 12, preferably from a ball mill or other type mill capable of fine-grinding the comminuted material. Material from thesecondary material feed 24 is of a sufficiently small size and dimension that it will not harm therotor 12 or the rotor vanes 18 when fed into therotor housing 14. It is preferable that material entering thesecondary material feed 24 is of a size and dimension that would normally be carried by the vortical forces in therotor housing 14. That is, material from thesecondary feed 24 is preferably small enough to be carried by the wind currents inside therotor housing 14. - Situated directly beneath the
rotor 12 is theproduct duct 26. Comminuted material that is fine enough to be drawn into therotor 12 is conducted into theproduct duct 26, and out of theair separator 10 through aproduct exit port 28. Theproduct exit port 28 can then be connected to other machinery for settling the comminuted product from the conveying air. - The
product duct 26 is comprised of two regions, the uppercylindrical portion 30 located proximate to therotor 12, and the lower frusto-conical portion 32, located distal from therotor 12. This profile allows for the maintenance of sufficient velocities within theproduct duct 26. - Preferably, the
product exit port 28 is provided with a slight vacuum, such that air within theair separator 10 is drawn out through theproduct exit port 28. This ensures the prompt removal of finely comminuted material from theair separator 10. - Material from the
secondary material feed 24 that is too large to be carried by vortical forces into therotor 12 is expelled centrifugally outward from therotor 12. Located circumferentially between therotor 12 and therotor housing 14 are a plurality of angularly adjustable, stationary guide vanes 34 (which are shown schematically inFigure 3 ). Thesevanes 34 serve to direct the separating air into therotor 12. They are shown with associated pivots 35. - The fine rejects
vessel 36 is positioned generally concentrically around the product vessel orduct 26, with the product discharge outlet or exitport 28 extending therethrough. Similar to theproduct vessel 26, the fine rejectsvessel 36 is comprised of an uppercylindrical portion 38, and a lower frusto-conical portion 40. The upper edge of theupper portion 38 is generally coplanar with the intersection of theproduct vessel 26 and therotor 12. The plurality ofguide vanes 34 are connected to and extend from the top of theupper portion 38 and are also connected to therotor housing 14. - Material collected into the fine rejects
vessel 36 is directed out of theair separator 10 through discharge outlet orexit 42. Material from theexit 42 can then be redirected to a ball mill grinder for further processing, and eventual reintroduction to theair separator 10 through thesecondary material feed 24. - A final coarse rejects
vessel 44 is concentrically located around the fine rejectsvessel 36, with both theproduct exit 28 and the fine rejectsexit port 42 extending there through. The coarse rejectsvessel 44 is comprised of an uppercylindrical portion 46, and a lower frusto-conical portion 48, similar to the fine rejectsvessel 36. The annularly definedspace 52 between theupper portion 38 of the fine rejectsvessel 36 and theupper portion 46 of finalcoarse rejects vessel 44 allow for air flow from thatannular space 52 upward through the plurality ofguide vanes 34, and into therotor 12. - Integrally and tangentially attached to the coarse rejects vessel is a
primary material feed 56. The primary material feed 56 functions both as an air inlet and for introduction of coarsely comminuted feed material. Feed material entering theair separator 10 at theprimary material feed 56 is typically material that has been passed through a first stage comminution device, such as a high pressure roll press. - Advantageously, the
feed 56 is a spiral inlet, preferably having a 180° twist. Air entering theseparator 10 at theprimary material feed 56 creates a flow that can carry fine particles upward into therotor housing 14 androtor 12 for segregation between theproduct vessel 26 andfine rejects vessel 36. Material from theprimary material feed 56 that is too heavy for transport into therotor housing 14 is separated out of theair separator 10 into thecoarse rejects vessel 44, and is discharged at the coarse rejects discharge outlet orexit 50, for further comminution. - From the foregoing, it is readily apparent that I have invented an improved cyclonic air separator for the use in conjunction with the compressive comminution of granular material, including cement clinker. The air separator is provided with a plurality of concentric, partially conical vessels. A rotor is provided atop the vessels to provide vortical wind currents within the vessels, and segregates feed material into the various vessels based on particle size. Separated feed material is withdrawn from one of a plurality of vessel exit ports for use as a final product. Withdrawn comminuted material can be reintroduced into the air separator at one of a plurality of entrance ports, based on either or both of the size of the particles, and the comminution processes already undergone.
Claims (3)
- An air separator for the selective separation of different sized particles comprising:a series of concentric vessels (26, 36, 44), the separator having at least one material inlet (56) and three material discharge outlets (28, 42, 40), each outlet being associated with one of said vessels;each of said vessels being partially conical;a top housing (14) having an upper surface and a substantially cylindrical inner surface;a rotary shaft (16) extending through said upper surface, concentric with said inner surface;a rotor (12) concentric with said inner surface, said rotor (12) being attached to said rotary shaft (16);a first concentric vessel (44), said first vessel comprising a first upper portion having a tangentially aligned air inlet (52), and a frusto-conical first lower portion (48) having at least one first sidewall and a first material outlet;a second concentric vessel (36), disposed within said first concentric vessel (44), said second concentric vessel comprising a second upper portion (38) and a frusto-conical second lower portion (40) having at least one second sidewall and a second material outlet (42) extending through said first sidewall;a third concentric vessel (26), disposed within said first concentric vessel (44), said third concentric vessel (26) comprising a third material outlet (28) extending through said first sidewall and said second sidewall;characterized in that the air separator is further comprising:a second material feed (24) extending through said upper surface to deliver unsorted materials into said top housing (14);said third concentric vessel (26)being disposed positioned substantially below said rotor (12);said first material feed (56) being connected to said tangential air inlet (52); andwherein said second upper portion (38) forms a barrier between said first upper portion (46) and the interior of said second concentric vessel (38), and wherein air flow is directed from said air inlet (56) over said barrier, through said rotor (12), and out said third material outlet (28).
- Air separator according to claim 1, further comprising:a roll press;a ball mill, wherein the second material feed (24) is arranged for receiving material from said ball mill;wherein the first material outlet (50) is arranged for delivering separated material to said roll press;wherein the second material outlet (42) is arranged for delivering separated material to said ball mill;wherein the third material outlet (28) is arranged for delivering finished product and wherein the first material feed (24) is arranged for receiving material from said roll press.
- A method of segregating comminuted material for further processing comprising;
providing an air separator comprising:an air separator for the selective separation of different sized particles comprising:a series of concentric vessels (26, 36, 44), the separator having at least one material inlet (56) and three material discharge outlets (28, 42, 40), each outlet being associated with one of said vessels;each of said vessels being partially conical;a top housing (14) having an upper surface and a substantially cylindrical inner surface;a rotary shaft (16) extending through said upper surface, concentric with said inner surface;a rotor (12) concentric with said inner surface, said rotor (12) being attached to said rotary shaft (16);a second material feed (24) extending through said upper surface to deliver unsorted materials into said top housing (14);a first concentric vessel (44), said first vessel comprising a first upper portion having a tangentially aligned air inlet (52), and a frusto-conical first lower portion (48) having at least one first sidewall and a first material outlet;a second concentric vessel (36), disposed within said first concentric vessel (44), said second concentric vessel comprising a second upper portion (38) and a frusto-conical second lower portion (40) having at least one second sidewall and a second material outlet (42) extending through said first sidewall;a third concentric vessel (26), disposed within said first concentric vessel (44) and positioned substantially below said rotor (12), said third concentric vessel (26) comprising a third material outlet (28) extending through said first sidewall and said second sidewall;said first material feed (56) being connected to said tangential air inlet (52); andwherein said second upper portion (38) forms a barrier between said first upper portion (46) and the interior of said second concentric vessel (38), and wherein air flow is directed from said air inlet (56) over said barrier, through said rotor (12), and out said third material outlet (28);and providing: a roll press;a ball mill, wherein the second material feed (24) is arranged for receiving material from said ball mill;wherein the first material outlet (50) is arranged for delivering separated material to said roll press;wherein the second material outlet (42) is arranged for delivering separated material to said ball mill;wherein the third material outlet (28) is arranged for delivering finished product and wherein the first material feed (24) is arranged for receiving material from said roll press;and receiving a first material from the press roll into said first material feed (56);receiving a second material from a ball mill into said second material feed (24);segregating said frist material and said second material for discharge at either said first material outlet (50), or said third material outlet (28) and directing an air flow from an air inlet over said barrier through said rotor (12) and out said third material outlet (28).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US87961807P | 2007-01-10 | 2007-01-10 | |
PCT/US2008/000356 WO2008086026A1 (en) | 2007-01-10 | 2008-01-10 | Air separator for comminuted materials |
Publications (4)
Publication Number | Publication Date |
---|---|
EP2125229A1 EP2125229A1 (en) | 2009-12-02 |
EP2125229A4 EP2125229A4 (en) | 2013-03-27 |
EP2125229B1 true EP2125229B1 (en) | 2014-02-26 |
EP2125229B2 EP2125229B2 (en) | 2021-01-13 |
Family
ID=39609015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08705553.9A Not-in-force EP2125229B2 (en) | 2007-01-10 | 2008-01-10 | Air separator for comminuted materials |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2125229B2 (en) |
DK (1) | DK2125229T4 (en) |
WO (1) | WO2008086026A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016203420A1 (en) | 2016-03-02 | 2017-09-07 | Thyssenkrupp Ag | Classifier for viewing a material flow |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017203812A1 (en) * | 2017-03-08 | 2018-09-13 | Thyssenkrupp Ag | Visual device and method for viewing a material flow |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1735479A (en) * | 1928-02-04 | 1929-11-12 | Sturtevant Mill Co | Air separator |
DE908096C (en) * | 1951-04-25 | 1954-04-01 | Babcock & Wilcox Dampfkessel W | Air separator |
US3490702A (en) * | 1966-10-24 | 1970-01-20 | D Ore Mills Inc | Method of accelerating production of portland cement and similar material |
DE4005323A1 (en) †| 1990-02-20 | 1991-08-22 | Krupp Polysius Ag | Crushing plant for cement material - involves first stage accepting pre-crushed material, and feeding to second stage with constant output regulation |
DE4112018A1 (en) * | 1990-06-08 | 1991-12-12 | Kloeckner Humboldt Deutz Ag | SAFE |
DK167054B1 (en) * | 1990-11-26 | 1993-08-23 | Smidth & Co As F L | DOUBLE SEPARATOR FOR SEPARATION OF PARTICULATE MATERIAL |
DE4040890C2 (en) * | 1990-12-20 | 1995-03-23 | Krupp Foerdertechnik Gmbh | Air classifier |
DE4224704C2 (en) †| 1992-07-25 | 2002-01-31 | Kloeckner Humboldt Wedag | Process and plant for crushing regrind |
DE102004027128A1 (en) †| 2004-06-03 | 2005-12-22 | Polysius Ag | Sieve assembly, to sort granular materials into at least three fractions for a mill, has a concentric array of a static and a dynamic sieve around a common axis in a common housing |
-
2008
- 2008-01-10 WO PCT/US2008/000356 patent/WO2008086026A1/en active Application Filing
- 2008-01-10 DK DK08705553.9T patent/DK2125229T4/en active
- 2008-01-10 EP EP08705553.9A patent/EP2125229B2/en not_active Not-in-force
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016203420A1 (en) | 2016-03-02 | 2017-09-07 | Thyssenkrupp Ag | Classifier for viewing a material flow |
WO2017148882A1 (en) | 2016-03-02 | 2017-09-08 | Thyssenkrupp Industrial Solutions Ag | Classifier for classifying a material flow |
Also Published As
Publication number | Publication date |
---|---|
EP2125229B2 (en) | 2021-01-13 |
EP2125229A4 (en) | 2013-03-27 |
WO2008086026A1 (en) | 2008-07-17 |
EP2125229A1 (en) | 2009-12-02 |
DK2125229T3 (en) | 2014-05-19 |
DK2125229T4 (en) | 2021-02-22 |
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