CA1308693C - Separation of granular solid material - Google Patents
Separation of granular solid materialInfo
- Publication number
- CA1308693C CA1308693C CA000555351A CA555351A CA1308693C CA 1308693 C CA1308693 C CA 1308693C CA 000555351 A CA000555351 A CA 000555351A CA 555351 A CA555351 A CA 555351A CA 1308693 C CA1308693 C CA 1308693C
- Authority
- CA
- Canada
- Prior art keywords
- vessel
- inlet
- axial
- outlet
- medium
- 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.)
- Expired - Fee Related
Links
Classifications
-
- 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
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
- B03B5/32—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions using centrifugal force
- B03B5/34—Applications of hydrocyclones
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C5/00—Apparatus in which the axial direction of the vortex is reversed
- B04C5/24—Multiple arrangement thereof
- B04C5/26—Multiple arrangement thereof for series flow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04C—APPARATUS USING FREE VORTEX FLOW, e.g. CYCLONES
- B04C7/00—Apparatus not provided for in group B04C1/00, B04C3/00, or B04C5/00; Multiple arrangements not provided for in one of the groups B04C1/00, B04C3/00, or B04C5/00; Combinations of apparatus covered by two or more of the groups B04C1/00, B04C3/00, or B04C5/00
Abstract
ABSTRACT OF THE INVENTION
In a method and apparatus for separating solid granular material of different densities material to be separated together with a control medium is fed to a first vessel 1 where it is divided into relatively heavy and light material and discharged through separate outlets 7, 8. The heavier material discharged through the outlet 8 is fed directly to the inlet 14 of the second vessel 2 such as a cyclone separator and further separated into two densities of material. Supplementary dense medium may be added to the vessel 2 through inlet 16 or 17 if required.
In a method and apparatus for separating solid granular material of different densities material to be separated together with a control medium is fed to a first vessel 1 where it is divided into relatively heavy and light material and discharged through separate outlets 7, 8. The heavier material discharged through the outlet 8 is fed directly to the inlet 14 of the second vessel 2 such as a cyclone separator and further separated into two densities of material. Supplementary dense medium may be added to the vessel 2 through inlet 16 or 17 if required.
Description
1 3 ~ 9 3 -1~ 23479-lG6 SEPARATION ~ ~I('Nu,~ ~OLID MATERIAL
This inven~ion rela~es to apparatus for separating granular solid matter.
In particular the inventi.on is concerned wlth apparatus which separates yranular solid material into at least three different categories accorcling to their clensity.
In British Patent Specification No. 2,1~7,8~1 B filed by Coal Industry (Patents) Limited, there is described a novel form of apparatus ~7hich is of essentially tubular form and which separates material fed into it at one encl by discharging the lower density mater:Lal centrally along the longitudinal axis of the apparatus and the higher density material together with the dense medium tangentially at the other end of the apparatus. The heavy density material is then fed to a secondary vessel having a generally circular cross section arranged coaxially with its longitudinal axis ancl a tangential inlet. The outlet fcr the solid material and the dense medium is displaced from the longitudinal axis.
There is also described in British Patent AppLication No. 8511588 filed by Coal Industry (Patents) Limited ~.di ' 1 3Q~93 2 23~79-1~6 (Publication No. 2 167 322 A) a separator means where ~he granular solid material passes effectively between two chamber6 so that the low density mater.ial is subje~ted to a second separating action.
It has been found that when granular mate.rial such as coal is being separated from run of the mine dirt where the run of the mine dirt constitutes a material having a higher specific gravity than that of the coal to be separated the application of a single stage of separation results in some wanted material being ~ischarged with the dirt ancl this means that there is a loss of wanted matter. Furthermore there is often a need to separate into three ranges of materials so that a 'Middlings' cut can be taken.
It is an object of the present invention to be able to process the run of the mine coal to extract selectively wanted material into three categories.
A first aspect of the p~esent invention provides apparatus for separating solid granular material of di~ferent densitles into at least three cateyories comprising a ~irst vessel and a second vessel bo~h o~ generally tubular shape! the first vessel having an axial inlet for a mlx o~ material to be separated and a control medium, a tangential inlet remote from the axial inlet for the introduction of a dense medlum, an axial outlet adjacent the tangential inlet for the discharge of relatively light density separated material, a tangential outlet ad~acent the axial inlet for the discharge o~ relatively high density material, the said tangential outlet of the first vessel heing connected to a tangential inlet of the second vessel, the second vessel' being 1 30~q3 ~ 23479-166 provided wlth an axial outlet adjacent the tangential inlet ~or low density material, and a further axial outlet for relatlvely higher density material.
The second vessel is convenien~ly a cyclone separator wherein the lower density separa~ed material is discharged through the top of the apparatus and the high density through the lower end of the apparatus. Howev~r as an alternative the second vessel may be similar to the first vessel wlth the second outlet from the first vessel constituting the first inlet of the second vessel.
Further dense medium may be injected in~o the flow of the separated material into the second vessel. ~his injection may take place through a separate inlet to the second vessel which is preferably tangential.
The discharge from the second vessel may conveniently be fed if necessary by other means such as a crusher to be recycled as the input to the first vessel.
A second aspect of the present inven~ion provides a method of separating solid granular material of dl~ferent densities into at least ~hree categories of density comprising:
feeding to a tangential inlet of a first vessel of tubular shape a dense medium of a first specific gravity in such a manner as to create a central vortex area extending longitudinally of the vessel, feediny to an axial inlet of the first vessel a mix of makerlal to be separated, dlscharging from an axial outlet relatively light density separated material, ~'1 ' '~
1 3~5q3 ~ , 23479-166 discharging from a tangential outlet relatively high density material into a second vessel wherein the relatively high density material is further separated into two further ratios of specific gravity, and feeding to the axial inlet of the first vessel a control medium with the mix of material in order to control the ratio of specified gravities of materials to khe outlets.
In order that the inventlon may be readily understood one example of apparatus for separating solid granular material will now be described with re~erence to the two figures of the accompanying drawings. Fiyure 1 shows a schema~ic illustration of the apparatus and Figure 2 shows a diagrammatic end elevation of Figure 1.
The apparatus in this particular application is for saparating coal from dirt in a mixture which is direc~ly received as run of the mine output.
Referring now to the drawings the apparatus comprises kwo vessels 1, 2. The first vessel 1 is of generally tubular form and has an axial inlet 3 at its top end into which the run of mine material is fed in direction of the arrow 4 together with ~ 3n~3 a control medium.
An inlet 5 at the lower end of the vessel 1 is for a dense liquid medium to be injected in a tangential mode. The liquid dense medium 6 creates a vortex within t~e vessel l.
Ihe vessel l has tw~ outlets a lcwer outlet 7 whi¢h is lying along the longitudinal axis of the vessel l and a second outlet 8 which is at the top of the vessel l and is tangential thereto.
The inlet 3 extends below the level of the outlet 8 to ensure that none of the material 4 which is fed in is accidentally transferred straight into the outlet 8 without being separated.
The second vessel 2 is a cyclone separator of oonventional design. Ihis comprises an upper part ll d a generally cylindrical cross section connected to a conical lower part 12 which tapers to an outlet 13. The cylindrical upper part has a tangential input 14 which is connected directly to the seoond outlet 8 of the ~irst vessel l. 1he top of the second vessel 2 has an outlet 15 ~hich is axially arranged.
In operation the dense liquid medium 6 is fed into inlet 5 and creates the vortex a10ng the centre line of the vessel l. A mixture of a control medium and material to be treated is fed into inlet 3 in the direction of arrcw 4 where it is caught up in this vortex and the more dense particles are thrown to the separator wall and pushed upwards in the vessel until t~ey exit via the outlet 8. Ihe less dense particles, which will be 1 3 0 ~1 6 9 3 coal, will move along the longitudinal axis of the vessel 1 to the outlet 7 and will then pass from the apparatus as separated coal.
me denser material of higher specific gravity which passes with the dense medium through the cutlet 8 is ~ed directly into the inlet 14 of the vessel 2 and due to the tangential nature of the input it swirls around the cyclone and separates in a conventional manner so that the higher density material will pass through the outlet 13 at the bottcm of the separator and the low density material will pass through the second outlet 15 at the top of the se~arator.
The use of an added control medium at 4 enables the 'cut' of separated material to be controlled. ~he way this works is that the medium entering ~he chamber at 6 will be o~ a certain desired relative density~ miS, if no new mediu~ was added at p~int 4, would naturally give a separation at a certain relative density in the irst chamber 1 and at a higher relative density in the second chamber 2. By adding a lawer density medium at inlet 4 a lower relative density separation is made in the first chamber. By addition of higher relative densi~y medium at point 4 results in much higher relative density separation in the second chamber.
A typical set of separation results on coal obtained from Cotgrave Calliery and using a medium having a relative density of 1.45 is given in the following table and re~ers to the various inputs and outputs in the Figures.
1 30~3693 Slze Fraction ~mm) 25-0.5 25-B B-4 4-2 2 0.5 Input at 4 - _ ~t % of Feed 100.00 40.1830.97 17.64 11.21 Input at 4 Feed Ash % 45.38 45.6645.13 46.63 52.20 ~lean Coal Yield % 42.46 45.18 42.59 40.73 35.02 Output at 7 ~lean Coal Ash % 6.12 7.41 5.27 4.72 5.53 ~iddlings Yield ~ 11.93 13.88 11.36 10.72 8.44 Output at 15 ~iddlings Ash %35.89 36.1235.14 36.20 37.05 Reject Yield %45.61 40.9446.05 48.55 56.54 Output at 13 Reject Ash % 84.41 84.9584.45 84.09 83.37 Clean Coal & 54.39 59.0653.95 51.45 43.46 Outputs at 7 Middlings Yield % and 15 Clean Coal & 12.65 14.1611.56 11~28 11.65 Middlings Ash %
Primary dp 1.427 1.4171.420 1.440 1.475 Density of Primary E~m 0.028 0.0300.020 0.028 Q.049 separation Secondary dp 1.885 1.8701.792 1.770 1.88D Density of Secondary EFm 0.094 0.0670.070 0.091 0.111 separation dp difference 0.408 0.4580.372 0.330 0.405 difference . at 7 and 15 _ 1 3n~,~q3 Misplaced Materials ~ , _ ~ at vessel 1 % at Primary Cut-point 1) ~btal 2.32 2.90 1.31 1.59 3O~3 2) In Clean Coal 1.20 1.37 0.57 0.46 1~31 3) In Reject 1.12 1.53 0.74 1.13 2.32 Misplaced Materials at vessel 2 % at Secondary Cut-point 1) Total 1.45 1.20 1.10 1.44 3.57 2) In Clean Coal 0.56 0.41 0.55 0.84 1.6~
3) In Reject 0~89 0.79 0.55 0.60 1.95 l ___ _ 1 30~693 From the table it will be seen how the differences in density of the three products at points 7, 13, and 15 vary.
Further control of the differences in density separation are obtained by altering the quantity and nature of the medium fed in at 4 to mix with the material to be separated. Typical dense mediu~s used can be suspensions made up of water and magnetite, sand karytes, ferrosilicon or clays.
The use of the control medium allows a range of control separation to be achieved at will and as can be seen from the table the cut-off points (dp) are able to be well spread and the separation efficiency as indicated by the Epm are relatively gocd.
When material is separated in the vessel 1 the dense medium itself also is subjected to some separation action and the medium exiting through outlet 7 is of a lower specific gravity than that exiting through outlet 8 and into inlet 14.
This difference in specific gravity may in general be sufficient for the cyclone vessel 2 to separate effectively but if a further selected and controlled separation is required of a different nature a further dense medi~ may ~e fed in of a further specific gravity. Ihis further dense medium can be fed in in one of tWD positions as shcwn by the dotted feed lines 16 or 17. If the medium is fed in through the feed line 16 it enters with the medium discharged from outlet 8 and is mixed on it entry into the vessel 2. Alternatively a separate tangential entry 17 is arranged lcwer down the vessel 2 but in 1 30gh93 the cylindrical part ll thereof and medium fed through feed line 17 is mixed at a lower point in the separator.
Ihe low density material coming through the outlet 15 of the vessel 2 will most probably contain some wanted material such as middlings coal which can be fed to a crusher and then recycled in crushed form with the run of the mine material 4 at inlet 3.
It will be appreciated that the invention can be used in a number of ways with judicious selection of dense medium to obtain a classification of materials whether material is in three or re categories. Fbr more than three categories ~he separator material is fed through a further cyclone or other separating vessel.
The application is not limited to the separation of material containing coal but can be used for separating other materials.
This inven~ion rela~es to apparatus for separating granular solid matter.
In particular the inventi.on is concerned wlth apparatus which separates yranular solid material into at least three different categories accorcling to their clensity.
In British Patent Specification No. 2,1~7,8~1 B filed by Coal Industry (Patents) Limited, there is described a novel form of apparatus ~7hich is of essentially tubular form and which separates material fed into it at one encl by discharging the lower density mater:Lal centrally along the longitudinal axis of the apparatus and the higher density material together with the dense medium tangentially at the other end of the apparatus. The heavy density material is then fed to a secondary vessel having a generally circular cross section arranged coaxially with its longitudinal axis ancl a tangential inlet. The outlet fcr the solid material and the dense medium is displaced from the longitudinal axis.
There is also described in British Patent AppLication No. 8511588 filed by Coal Industry (Patents) Limited ~.di ' 1 3Q~93 2 23~79-1~6 (Publication No. 2 167 322 A) a separator means where ~he granular solid material passes effectively between two chamber6 so that the low density mater.ial is subje~ted to a second separating action.
It has been found that when granular mate.rial such as coal is being separated from run of the mine dirt where the run of the mine dirt constitutes a material having a higher specific gravity than that of the coal to be separated the application of a single stage of separation results in some wanted material being ~ischarged with the dirt ancl this means that there is a loss of wanted matter. Furthermore there is often a need to separate into three ranges of materials so that a 'Middlings' cut can be taken.
It is an object of the present invention to be able to process the run of the mine coal to extract selectively wanted material into three categories.
A first aspect of the p~esent invention provides apparatus for separating solid granular material of di~ferent densitles into at least three cateyories comprising a ~irst vessel and a second vessel bo~h o~ generally tubular shape! the first vessel having an axial inlet for a mlx o~ material to be separated and a control medium, a tangential inlet remote from the axial inlet for the introduction of a dense medlum, an axial outlet adjacent the tangential inlet for the discharge of relatively light density separated material, a tangential outlet ad~acent the axial inlet for the discharge o~ relatively high density material, the said tangential outlet of the first vessel heing connected to a tangential inlet of the second vessel, the second vessel' being 1 30~q3 ~ 23479-166 provided wlth an axial outlet adjacent the tangential inlet ~or low density material, and a further axial outlet for relatlvely higher density material.
The second vessel is convenien~ly a cyclone separator wherein the lower density separa~ed material is discharged through the top of the apparatus and the high density through the lower end of the apparatus. Howev~r as an alternative the second vessel may be similar to the first vessel wlth the second outlet from the first vessel constituting the first inlet of the second vessel.
Further dense medium may be injected in~o the flow of the separated material into the second vessel. ~his injection may take place through a separate inlet to the second vessel which is preferably tangential.
The discharge from the second vessel may conveniently be fed if necessary by other means such as a crusher to be recycled as the input to the first vessel.
A second aspect of the present inven~ion provides a method of separating solid granular material of dl~ferent densities into at least ~hree categories of density comprising:
feeding to a tangential inlet of a first vessel of tubular shape a dense medium of a first specific gravity in such a manner as to create a central vortex area extending longitudinally of the vessel, feediny to an axial inlet of the first vessel a mix of makerlal to be separated, dlscharging from an axial outlet relatively light density separated material, ~'1 ' '~
1 3~5q3 ~ , 23479-166 discharging from a tangential outlet relatively high density material into a second vessel wherein the relatively high density material is further separated into two further ratios of specific gravity, and feeding to the axial inlet of the first vessel a control medium with the mix of material in order to control the ratio of specified gravities of materials to khe outlets.
In order that the inventlon may be readily understood one example of apparatus for separating solid granular material will now be described with re~erence to the two figures of the accompanying drawings. Fiyure 1 shows a schema~ic illustration of the apparatus and Figure 2 shows a diagrammatic end elevation of Figure 1.
The apparatus in this particular application is for saparating coal from dirt in a mixture which is direc~ly received as run of the mine output.
Referring now to the drawings the apparatus comprises kwo vessels 1, 2. The first vessel 1 is of generally tubular form and has an axial inlet 3 at its top end into which the run of mine material is fed in direction of the arrow 4 together with ~ 3n~3 a control medium.
An inlet 5 at the lower end of the vessel 1 is for a dense liquid medium to be injected in a tangential mode. The liquid dense medium 6 creates a vortex within t~e vessel l.
Ihe vessel l has tw~ outlets a lcwer outlet 7 whi¢h is lying along the longitudinal axis of the vessel l and a second outlet 8 which is at the top of the vessel l and is tangential thereto.
The inlet 3 extends below the level of the outlet 8 to ensure that none of the material 4 which is fed in is accidentally transferred straight into the outlet 8 without being separated.
The second vessel 2 is a cyclone separator of oonventional design. Ihis comprises an upper part ll d a generally cylindrical cross section connected to a conical lower part 12 which tapers to an outlet 13. The cylindrical upper part has a tangential input 14 which is connected directly to the seoond outlet 8 of the ~irst vessel l. 1he top of the second vessel 2 has an outlet 15 ~hich is axially arranged.
In operation the dense liquid medium 6 is fed into inlet 5 and creates the vortex a10ng the centre line of the vessel l. A mixture of a control medium and material to be treated is fed into inlet 3 in the direction of arrcw 4 where it is caught up in this vortex and the more dense particles are thrown to the separator wall and pushed upwards in the vessel until t~ey exit via the outlet 8. Ihe less dense particles, which will be 1 3 0 ~1 6 9 3 coal, will move along the longitudinal axis of the vessel 1 to the outlet 7 and will then pass from the apparatus as separated coal.
me denser material of higher specific gravity which passes with the dense medium through the cutlet 8 is ~ed directly into the inlet 14 of the vessel 2 and due to the tangential nature of the input it swirls around the cyclone and separates in a conventional manner so that the higher density material will pass through the outlet 13 at the bottcm of the separator and the low density material will pass through the second outlet 15 at the top of the se~arator.
The use of an added control medium at 4 enables the 'cut' of separated material to be controlled. ~he way this works is that the medium entering ~he chamber at 6 will be o~ a certain desired relative density~ miS, if no new mediu~ was added at p~int 4, would naturally give a separation at a certain relative density in the irst chamber 1 and at a higher relative density in the second chamber 2. By adding a lawer density medium at inlet 4 a lower relative density separation is made in the first chamber. By addition of higher relative densi~y medium at point 4 results in much higher relative density separation in the second chamber.
A typical set of separation results on coal obtained from Cotgrave Calliery and using a medium having a relative density of 1.45 is given in the following table and re~ers to the various inputs and outputs in the Figures.
1 30~3693 Slze Fraction ~mm) 25-0.5 25-B B-4 4-2 2 0.5 Input at 4 - _ ~t % of Feed 100.00 40.1830.97 17.64 11.21 Input at 4 Feed Ash % 45.38 45.6645.13 46.63 52.20 ~lean Coal Yield % 42.46 45.18 42.59 40.73 35.02 Output at 7 ~lean Coal Ash % 6.12 7.41 5.27 4.72 5.53 ~iddlings Yield ~ 11.93 13.88 11.36 10.72 8.44 Output at 15 ~iddlings Ash %35.89 36.1235.14 36.20 37.05 Reject Yield %45.61 40.9446.05 48.55 56.54 Output at 13 Reject Ash % 84.41 84.9584.45 84.09 83.37 Clean Coal & 54.39 59.0653.95 51.45 43.46 Outputs at 7 Middlings Yield % and 15 Clean Coal & 12.65 14.1611.56 11~28 11.65 Middlings Ash %
Primary dp 1.427 1.4171.420 1.440 1.475 Density of Primary E~m 0.028 0.0300.020 0.028 Q.049 separation Secondary dp 1.885 1.8701.792 1.770 1.88D Density of Secondary EFm 0.094 0.0670.070 0.091 0.111 separation dp difference 0.408 0.4580.372 0.330 0.405 difference . at 7 and 15 _ 1 3n~,~q3 Misplaced Materials ~ , _ ~ at vessel 1 % at Primary Cut-point 1) ~btal 2.32 2.90 1.31 1.59 3O~3 2) In Clean Coal 1.20 1.37 0.57 0.46 1~31 3) In Reject 1.12 1.53 0.74 1.13 2.32 Misplaced Materials at vessel 2 % at Secondary Cut-point 1) Total 1.45 1.20 1.10 1.44 3.57 2) In Clean Coal 0.56 0.41 0.55 0.84 1.6~
3) In Reject 0~89 0.79 0.55 0.60 1.95 l ___ _ 1 30~693 From the table it will be seen how the differences in density of the three products at points 7, 13, and 15 vary.
Further control of the differences in density separation are obtained by altering the quantity and nature of the medium fed in at 4 to mix with the material to be separated. Typical dense mediu~s used can be suspensions made up of water and magnetite, sand karytes, ferrosilicon or clays.
The use of the control medium allows a range of control separation to be achieved at will and as can be seen from the table the cut-off points (dp) are able to be well spread and the separation efficiency as indicated by the Epm are relatively gocd.
When material is separated in the vessel 1 the dense medium itself also is subjected to some separation action and the medium exiting through outlet 7 is of a lower specific gravity than that exiting through outlet 8 and into inlet 14.
This difference in specific gravity may in general be sufficient for the cyclone vessel 2 to separate effectively but if a further selected and controlled separation is required of a different nature a further dense medi~ may ~e fed in of a further specific gravity. Ihis further dense medium can be fed in in one of tWD positions as shcwn by the dotted feed lines 16 or 17. If the medium is fed in through the feed line 16 it enters with the medium discharged from outlet 8 and is mixed on it entry into the vessel 2. Alternatively a separate tangential entry 17 is arranged lcwer down the vessel 2 but in 1 30gh93 the cylindrical part ll thereof and medium fed through feed line 17 is mixed at a lower point in the separator.
Ihe low density material coming through the outlet 15 of the vessel 2 will most probably contain some wanted material such as middlings coal which can be fed to a crusher and then recycled in crushed form with the run of the mine material 4 at inlet 3.
It will be appreciated that the invention can be used in a number of ways with judicious selection of dense medium to obtain a classification of materials whether material is in three or re categories. Fbr more than three categories ~he separator material is fed through a further cyclone or other separating vessel.
The application is not limited to the separation of material containing coal but can be used for separating other materials.
Claims (9)
1. Apparatus for separating solid granular material of different densities into at least three categories comprising a first vessel and a second vessel both of generally tubular shape, the first vessel having an axial inlet for a mix of material to be separated and a control medium, a tangential inlet remote from the axial inlet for the introduction of a dense medium, an axial outlet adjacent the tangential inlet for the discharge of relatively light density separated material, a tangential outlet adjacent the axial inlet for the discharge of relatively high density material, the said tangential outlet of the first vessel being connected to a tangential inlet of the second vessel, the second vessel being provided with an axial outlet adjacent the tangential inlet for low density material, and a further axial outlet for relatively higher density material.
2. Apparatus as claimed in claim 1 wherein the second vessel is a cyclone separator.
3. Apparatus as claimed in claim 1 wherein the second vessel is a separator similar to the first vessel.
4. Apparatus as claimed in any one of claims 1 to 3, further including means for injecting a further dense medium into the second vessel.
5. Apparatus as claimed in claim 4 wherein the medium is injected separately and tangentially into the second vessel.
6. Apparatus as claimed in any one of claims 1 to 3, further including crushing means associated with the axial outlet of the second vessel and the axial inlet of the first vessel.
7. A method of separating solid granular material of different densities into at least three categories of density comprising:
feeding to a tangential inlet of a first vessel of tubular shape a dense medium of a first specific gravity in such a manner as to create a central vortex area extending longitudinally of the vessel, feeding to an axial inlet of the first vessel a mix of material to be separated, discharging from an axial outlet relatively light density separated material, discharging from a tangential outlet relatively high density material into a second vessel wherein the relatively high density material is further separated into two further ratios of specific gravity, and feeding to the axial inlet of the first vessel a control medium with the mix of material in order to control the ratio of specified gravities of materials to the outlets.
feeding to a tangential inlet of a first vessel of tubular shape a dense medium of a first specific gravity in such a manner as to create a central vortex area extending longitudinally of the vessel, feeding to an axial inlet of the first vessel a mix of material to be separated, discharging from an axial outlet relatively light density separated material, discharging from a tangential outlet relatively high density material into a second vessel wherein the relatively high density material is further separated into two further ratios of specific gravity, and feeding to the axial inlet of the first vessel a control medium with the mix of material in order to control the ratio of specified gravities of materials to the outlets.
8. A method as claimed in claim 7 which further included injecting a further dense medium into the second vessel.
9. A method as claimed in claim 8 wherein the medium is injected separately and tangentially into the second vessel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8630999 | 1986-12-30 | ||
| GB868630999A GB8630999D0 (en) | 1986-12-30 | 1986-12-30 | Separation of granular solid material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1308693C true CA1308693C (en) | 1992-10-13 |
Family
ID=10609654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000555351A Expired - Fee Related CA1308693C (en) | 1986-12-30 | 1987-12-24 | Separation of granular solid material |
Country Status (6)
| Country | Link |
|---|---|
| AU (1) | AU595970B2 (en) |
| BE (1) | BE1002909A3 (en) |
| CA (1) | CA1308693C (en) |
| DE (1) | DE3741753A1 (en) |
| GB (2) | GB8630999D0 (en) |
| ZA (1) | ZA879222B (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4927536A (en) * | 1989-03-21 | 1990-05-22 | Amoco Corporation | Hydrocyclone separation system |
| US5180486A (en) * | 1989-11-28 | 1993-01-19 | Lsr Environmental Systems Company | Potential flow centrifugal separator system for removing solid particulates from a fluid stream |
| DE4307230A1 (en) * | 1993-03-08 | 1994-09-15 | Krupp Polysius Ag | Process and plant for comminuting the bed of brittle regrind |
| AUPQ638600A0 (en) * | 2000-03-22 | 2000-04-15 | Geo2 Limited | Apparatus for mixing |
| JP2005262080A (en) * | 2004-03-18 | 2005-09-29 | Fukuma Manabu | Cyclone device, preparatory revolving part used therefor, dust removing apparatus equipped with cyclone device and automobile |
| EP1767276A1 (en) * | 2005-09-22 | 2007-03-28 | K.K. Fukuma Technica | Cyclone apparatus with preliminary swirling unit and powder dust remover or automobile including the apparatus |
| CN100417451C (en) * | 2005-10-24 | 2008-09-10 | 云南磷化集团有限公司 | Opened three-section swirler process of producing powdered concentrated phosphate rock |
| WO2009022353A1 (en) * | 2007-08-16 | 2009-02-19 | Tata Steel Limited | Cyclone for dense medium separation |
| WO2010043836A1 (en) * | 2008-10-15 | 2010-04-22 | Ath Regeneration Limited | Separation system and method |
| EP2335799A1 (en) * | 2009-12-04 | 2011-06-22 | Nifco UK Limited | Separation system for separating particles of solid or liquid dispersed in a gas |
| ZA201304412B (en) * | 2012-06-14 | 2015-06-24 | Multotec Process Equipment (Pty) Ltd | Centrifugal separator arrangement and method |
| CN112058479A (en) * | 2020-09-03 | 2020-12-11 | 中国矿业大学 | Two-section separation density regulating device and method for three-product heavy medium cyclone |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB756198A (en) * | 1953-03-06 | 1956-08-29 | Schuechtermann & Kremer | Method and apparatus for separating mixtures of solid materials in a heavy medium |
| US3219186A (en) * | 1962-10-30 | 1965-11-23 | Victor Rakowsky | Whirlpool apparatus |
| GB1113601A (en) * | 1964-10-02 | 1968-05-15 | Coal Industry Patents Ltd | Improvements in or relating to mineral separation |
| GB1130339A (en) * | 1965-01-26 | 1968-10-16 | Coal Industry Patents Ltd | Mineral separation |
| SE410276B (en) * | 1976-10-20 | 1979-10-08 | Sala International Ab | DYNAMIC SUSPENSION ENRICHMENT EQUIPMENT |
| GB2147831B (en) * | 1983-10-14 | 1986-03-05 | Coal Ind | Apparatus for separating granular solid material |
| GB8429933D0 (en) * | 1984-11-27 | 1985-01-03 | Coal Industry Patents Ltd | Cyclone separator means |
| FI80837C (en) * | 1985-05-03 | 1990-08-10 | Larox Ag | Hydraulic grading method and device |
-
1986
- 1986-12-30 GB GB868630999A patent/GB8630999D0/en active Pending
-
1987
- 1987-12-08 ZA ZA879222A patent/ZA879222B/en unknown
- 1987-12-09 DE DE19873741753 patent/DE3741753A1/en not_active Ceased
- 1987-12-10 GB GB8728905A patent/GB2199518B/en not_active Expired - Lifetime
- 1987-12-24 CA CA000555351A patent/CA1308693C/en not_active Expired - Fee Related
- 1987-12-30 BE BE8701512A patent/BE1002909A3/en not_active IP Right Cessation
- 1987-12-30 AU AU83123/87A patent/AU595970B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| GB2199518B (en) | 1990-08-22 |
| GB2199518A (en) | 1988-07-13 |
| DE3741753A1 (en) | 1988-07-14 |
| BE1002909A3 (en) | 1991-07-30 |
| ZA879222B (en) | 1988-06-09 |
| GB8630999D0 (en) | 1987-02-04 |
| AU595970B2 (en) | 1990-04-12 |
| GB8728905D0 (en) | 1988-01-27 |
| AU8312387A (en) | 1988-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4364822A (en) | Autogenous heavy medium process and apparatus for separating coal from refuse | |
| CA1308693C (en) | Separation of granular solid material | |
| US6015104A (en) | Process and apparatus for preparing feedstock for a coal gasification plant | |
| US4279743A (en) | Air-sparged hydrocyclone and method | |
| US5180486A (en) | Potential flow centrifugal separator system for removing solid particulates from a fluid stream | |
| US5197398A (en) | Separation of pyrite from coal in a fluidized bed | |
| EP0022659B1 (en) | Carbonaceous solids cleaning process | |
| US4696737A (en) | Fiber recovery elutriating hydrocyclone | |
| US3945575A (en) | Recovery of salvageable components from waste materials | |
| GB1568923A (en) | Process for cleaning and dewatering fine coal | |
| US3353673A (en) | Apparatus for specific gravity separation of solid particles | |
| US6666335B1 (en) | Multi-mineral/ash benefication process and apparatus | |
| US4133747A (en) | Method for processing raw coal | |
| CN108855579B (en) | Coal dressing method by using aqueous medium cyclone | |
| US4783254A (en) | Cyclone separator means | |
| EP0316201B1 (en) | Method and apparatus for separating and recovering particulate material | |
| CN105728180B (en) | A kind of processing recovery process of low grey coking floating tail-coal | |
| CA1317912C (en) | Method for efficient separation of coal from coal spoil in two stages of hydrocyclonic separation | |
| US4822482A (en) | Hydraulic separating apparatus and method | |
| US3472371A (en) | Sorting fibrous material | |
| GB2114473A (en) | Autogenous heavy medium process and apparatus for separating coal from refuse | |
| US3537657A (en) | Process for the upgrading of potash minerals consisting essentially of sylvinite | |
| CN206924886U (en) | The device of coal in being extracted in a kind of gangue | |
| USRE26720E (en) | Dhr=g dse | |
| US2978100A (en) | Method of and apparatus for concentrating and separating ore |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |