GB2147831A - Apparatus for separating granular solid material - Google Patents

Apparatus for separating granular solid material Download PDF

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Publication number
GB2147831A
GB2147831A GB08327618A GB8327618A GB2147831A GB 2147831 A GB2147831 A GB 2147831A GB 08327618 A GB08327618 A GB 08327618A GB 8327618 A GB8327618 A GB 8327618A GB 2147831 A GB2147831 A GB 2147831A
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GB
United Kingdom
Prior art keywords
solid material
dense medium
inlet
granular solid
outlet
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.)
Granted
Application number
GB08327618A
Other versions
GB8327618D0 (en
GB2147831B (en
Inventor
Steven Richard Shaw
Chandulal Lalji Shah
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Coal Industry Patents Ltd
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Coal Industry Patents Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Coal Industry Patents Ltd filed Critical Coal Industry Patents Ltd
Priority to GB08327618A priority Critical patent/GB2147831B/en
Publication of GB8327618D0 publication Critical patent/GB8327618D0/en
Publication of GB2147831A publication Critical patent/GB2147831A/en
Application granted granted Critical
Publication of GB2147831B publication Critical patent/GB2147831B/en
Expired legal-status Critical Current

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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
    • 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
    • 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

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  • Cyclones (AREA)

Abstract

The outlet (7) for the relatively denser fraction of granular solid material discharging from a treatment chamber (1) is provided with a secondary vessel (8) having a generally circular cross-section arranged 2 co-axially with the longitudinal axis (9) of the secondary vessel. The secondary vessel has a tangential inlet (10) and an outlet (11) having an axis (12) radially displaced from the longitudinal axis (9). <IMAGE>

Description

SPECIFICATION Separation of granular solid material This invention relates to apparatus for separating granular solid material.
In particular, the invention relates to apparatus for separating granular solid material of different densities.
Our Prior United Kingdon patent specification No. 994,351 described apparatus for separating granular solid material of different densities, comprising one or more separating vessels each arranged for receiving granular solid materials together with dense medium for separating the granular solid material according to density and having first discharge means for discharging less dense granular solid material together with dense medium, and second discharge means for discharging denser granular solid material together with dense medium, and wherein the or each second discharge means includes a secondary vessel having a tangential inlet connected to receive denser granular solid material together with the dense medium and discharge the dense medium and solid material into either a single outlet or into a plurality of outlets.In the secondary vessel the pressure energy of the discharge from the separating vessel is partially dissipated by the inward spiral flow so that a relatively large discharge means may be used without discharging an unduly large quantity of undersired liquid with the solid material.
Although the earlier patent specification alleged that the secondary vessel discharged dense medium and solids without effecting separation there between, in practice, it was found when treating relatively large size granular solid material there was a tendency for some solid material in the secondary vessel to remain in the radially outer most zones of the vessel rather than move towards the outlet. Consequently, it was found in practice that when treating relatively large size granular solid material the secondary vessel was subject to blockage problems.
An object of the present invention is to provide apparatus for separating granular solid material which tends to overcome or reduce the above mentioned blockage problems.
According to the present invention apparatus for separating granular solid material of different densities comprises a separating vessel arranged for receiving granular solid material and dense medium for separating the granular solid material according to density and having first discharge means for discharging relatively less dense granular solid material together with dense medium and second discharge means for discharging relatively denser granular solid material together with dense medium, and wherein said secondary discharge comprises a secondary vessel having a generally circular cross-section arranged co-axially with the longitudinal axis of the secondary vessel and an inlet connected to receive said relatively denser solid material together with dense medium, the in let being tangentially arranged with respect to said longitudinal axis and said generally circular cross section, the secondary vessel having an outlet for the discharge of said relative denser solid material together with dense medium, the axis of the outlet being radially displaced from said longitudinal axis.
By way of example the present invention will be described with reference to the accompanying drawings, in which: Figure 1 is a diagrammatic plan of apparatus for separating granular solid material contructed in accordance with a first embodiment of the present invention; Figure 2 is a diagrammatic end elevation of Figure 1; Figure 3 is a detailed plan of the apparatus of Figure 1; Figure 4 is a partly sectioned detailed side elevation of the apparatus of Figure 3; Figure 5 is one end view of the apparatus of Figure 4; Figure 6 is another end view of the application of Figure 4; Figure 7 is a diagrammatie side elevation of apparatus for separating granular solid material constructed in accordance with a second embodiment of the present invention; and Figure 8 is a plan of Figure 7.
Referring to Figures 1 and 2 of the drawings, apparatus constructed in accordance with the first embodiment of the present invention comprises a generally cylindrical treatment chamber 1 having a horizontal longitudinal axis 2. In other installations the longitudinal axis may be inclined or vertical.
The chamber 1 has an axially arranged raw feed inlet 3 for untreated granular solid material of different densities, for example raw coal, and an involute inlet 4 for dense medium, the inlet 4 being at the opposite end of the chamber 1 to the inlet 3 which is provided with a feed pipe 5 extending into the chamber 1.
The end of the chamber 1 associated with the inlet 4 is provided with an outlet 6 for the discharge of treated relatively less dense solid material, for example clean coal. The chamber is provided with an involute second outlet 7 for the discharge of treated relatively denser solid material, for example reject, the outlet 7 being arranged at the end of the chamber associated with the raw feed inlet 3.
The feed pipe 5 extends longitudinally into the chamber 1 beyond the second outlet 7 to prevent untreated material short circuiting the treatment chamber.
The second discharge outlet 7 comprises a generally cylindrical secondary vessel 8 having a generally circular cross-section arranged co-axial with the longitudinal axis 9 of the secondary vessel. The secondary vessel 8 has an inlet 10 connected to receive said relatively denser solid material together with dense medium for discharging from the chamber 1, the inlet 10 being tangentially arranged with respect to said longitudinal axis 9 and said generally circular cross-section. An outlet 11 for the discharge of the relatively denser solid material together with dense medium from the secondary vessel 8 is provided in an end wall of generally cylindrical vessel, as seen in Figure 1 the axis 12 of the outlet 11 is radially displaced from the longitudinal axis 9.Also as seen in Figure 1 the outlet 11 is circular and the two mutually perpendicular centre lines 13 and 14 intersecting at the axis 9 and being parallel to the tangential inlet 10 and normal to the inlet 10, respectively, are tangents to the outer boundary of the circular outlet. The outlet axis 12 is on the side of centre line 13 remote from the tangential inlet 10 and on the same side of the centre line 14 as the inlet 10.
In operation, moist, untreated granular solid material, for example raw feed coal, is fed to the axial inlet 3 and via feed pipe 5 it is drawn into the generally cylindrical chamber 1. Simultaneously, dense medium is fed into the chamber 1 via inlet 4 at end of the chamber 1 remote from the raw feed inlet 3.
The centrifugal action of the dense medium flowing rapidly around the inside cylindrical wall of the chamber draws the raw feed into the chamber.
Upon leaving the feed pipe 5 the relatively denser fraction of the solid material tends to be urged radially outwards under centrifugal action and moves along the inside of the cylindrical wall towards the involute outlet 7. The relatively less dense fraction of the solid material leaving the feed pipe 5 tends to remain nearer the longitudinal axis 2 of the chamber 1 and is drawn toward the axial outlet 6.
The flow rate inside the treatment chamber is determined by the action of the secondary vessel 8 which maintains a desired back pressure at the discharge outlet 7. Upon entering the secondary vessel 8 via the tangential inlet 10 the relatively denser fraction of the solid material together with dense medium flows rapidly around the inside boundary wall of the vessel the pressure energy of the discharge from the treatment chamber 1 being partially dissipated by the inward spiral flow so that a relatively large discharge outlet is used without discharging an unduly large quantity of dense medium with the solid material. Any tendency for centrifugal action to urge relatively larger size solid material to remain adjacent to the boundary wall of the vessel is overridden by having the outlet 11 displaced from the longitudinal axis 9 of the vessel.Thus, all solid material entering the secondary vessel is discharged via the outlet 11 and blockage problems tend to be eliminated.
Figures 3 to 6 are detailed drawings of the apparatus illustrated in diagrammatic form in Figures 1 and 2. The same reference numbers being used for similar items. In Figures 3 to 6 the longitudinal axis 2 of the treatment chamber 1 is inclined to the horizontal. Broken lines 20 in Figure 4 indicate a supporting frame work.
Figures 7 and 8 show diagrammatically a second embodiment of the present invention. The apparatus for separating granual solid material, for example coal, comprises a generally cylindrical chamber 31 having a longitudinal axis 32 arranged substantially vertical. The uppermost end of the chamber 31 is provided with an involute inlet 33 for raw feed granular solid material together with dense medium. The lowermost end of the chamber is provided with an axial outlet 34 for the relatively less dense fraction of the solid material together with dense medium and an involute outlet 35 for the relatively denser fraction of solid material together with dense medium. The outlet 34 is provided with a discharge pipe 36 extending upwards into the chamber 1. An annular plate 37 defines a throat 38 through which the relatively denser fraction must pass before reaching outlet 35.The outlet 35 is provided with a secondary vessel substantially identical to the secondary vessel 8 of the previously described embodiment. Consequently in Figures 7 and 8 the same reference number have been used for similar items to those on Figures I and 2. No further description of the details of secondary vessel 8 of Figures 7 as 8 is necessary.
In use, raw feed untreated granular solid material of different densities, for example coal, together with dense medium is fed to the involute inlet 33. Upon entering the chamber the raw feed and the dense medium flow rapidly around the inside circular wall of the cylindrical chamber. The relatively denser fraction of the solid material tends to be drawn under centrifugal action radially outwards and is urged along the wall surface and through the throat 38 towards the outlet 35. The relatively less dense fraction of the solid material entering the chamber is less affected by the centrifugal action and is urged nearer to the longitudinal axis 32 of the chamber to be discharged via the axial outlet 34.
The relatively denser fraction of the solid material and dense medium discharge via the tangential outlet 35 is subjected to the same further treatment in the secondary vessel 8 as that described earlier in this specification and further description is considered to be unnecessary.
As with the previously described first embodiment of the present invention, the secondary vessel 8 of the second described embodiment tends to overcome the aforementioned blockage problem.

Claims (7)

1. Apparatus for separating granular solid material of different densities comprises a separating vessel arranged for receiving granular solid material and dense medium for separating the granular solid material according to density and having first discharge means for discharging relatively less dense granular solid material together with dense medium and second discharge means for discharging relatively denser granular solid material together with dense medium, and wherein said secondary discharge comprises a secondary vessel having a generally circular cross-section arranged co-axially with the longitudinal axis of the secondary vessel and an inlet connected to receive said relatively denser solid material together with dense medium, the inlet being tangentially arranged with respect to said longitudinal axis and said generally circular cross-section, the secondary vessel having an outlet for the discharge of said relatively denser solid material together with dense medium, the axis of the outlet being radially displaced from said longitudinal axis.
2. Apparatus as claimed in claim 1, in which the outlet provided in the secondary vessel is circular.
3. Apparatus as claimed in claim 2, in which two mutually perpendicular centre lines intersecting at the longitudinal axis of the secondary vessel and being parallel to the tangential inlet to the secondary vessel and normal to the tangential inlet, respectively, are tangents to the outer boundary of the circular outlet.
4. Apparatus as claimed in claim 3, in which the axis of the circular outlet is on the side of said centre line parallel to the tangential inlet remote from the tangential inlet.
5. Apparatus as claimed in claim 3 or 4, in which the axis of the circular outlet is on the same side of the said centre line normal to the tangential inlet as is the tangential inlet.
6. Apparatus as claimed in any one of the preceding claims, in which the raw feed and the dense medium are fed into the treatment chamber through different inlet means.
7. Apparatus for separating granular solid material of different densities, substantially as described herein and substantially as shown in Figures 1 and 2, or Figures 3 to 6 or Figures 7 and 8 of the accompanying drawings.
7. Apparatus as claimed in any one of the preceding claims 1 to 5, in which the raw feed and the dense medium are fed into the treatment chamber through a common inlet means.
8. Apparatus for separating granular solid material of different densities, substantially as described herein and substantially as shown in Figures I and 2, or Figures 3 to 6 or Figures 7 and 8 of the ac comparing drawings.
New claims or amendments to claims filed on 12.1.84.
Superseded claims 1-8.
New claims:- 1-7.
1. Apparatus for separating granular solid material of different densities comprises a separating vessel arranged for receiving granular solid material and dense medium for separating the granular solid material according to density and having first discharge means for discharging relatively less dense granular solid material together with dense medium and second discharge means for discharging relatively denser granular solid material together with dense medium, and wherein said secondary discharge comprises a secondary vessel having a generally circular cross-section arranged co-axially with the longitudinal axis of the secondary vessel and an inlet connected to receive said relatively denser solid material together with dense medium, the inlet being tangentially arranged with respect to said longitudinal axis and said generally circular cross-section, the secondary vessel having a circular outlet for the discharge of said relatively denser solid material together with dense medium, the axis of the circular outlet being radially displaced from said longitudinal axis.
2. Apparatus as claimed in claim 1, in which two mutually perpendicular centre lines intersecting at the longitudinal axis of the secondary vessel and being parallel to the tangential inlet to the secondary vessel and normal to the tangential inlet, respectively, are tangents to the outer boundary of the circular outlet.
3. Apparatus as claimed in claim 2, in which the axis of the circular outlet is on the side of said centre line parallel to the tangential inlet remote from the tangential inlet.
4. Apparatus as claimed in claim 2 or 3, in which the axis of the circular outlet is on the same side of the said centre line normal to the tangential inlet as is the tangential inlet.
5. Apparatus as claimed in any one of the preceding claims, in which the raw feed and the dense medium are fed into the treatment chamber through different inlet means.
6. Apparatus as claimed in any one of the preceding claims 1 to 5, in which the raw feed and the dense medium are fed into the treatment chamber through a common inlet means.
GB08327618A 1983-10-14 1983-10-14 Apparatus for separating granular solid material Expired GB2147831B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08327618A GB2147831B (en) 1983-10-14 1983-10-14 Apparatus for separating granular solid material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08327618A GB2147831B (en) 1983-10-14 1983-10-14 Apparatus for separating granular solid material

Publications (3)

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GB8327618D0 GB8327618D0 (en) 1983-11-16
GB2147831A true GB2147831A (en) 1985-05-22
GB2147831B GB2147831B (en) 1986-03-05

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2199518A (en) * 1986-12-30 1988-07-13 Coal Ind Separation of granular solid material
GB2231515A (en) * 1989-03-21 1990-11-21 Amoco Corp A hydrocyclone separation system
GB2331257A (en) * 1997-11-17 1999-05-19 John Mcculloch A mineral separation process
RU2479353C1 (en) * 2011-11-08 2013-04-20 Александр Александрович Буханков Dressing device
RU201832U1 (en) * 2020-08-14 2021-01-14 Общество с ограниченной ответственностью "ЮГТЕХМАШ" Dead-end heavy metals concentrator

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1003537A (en) * 1963-10-18 1965-09-02 Celleco Ab Discharge arrangement for use in a vortex-type separator

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1003537A (en) * 1963-10-18 1965-09-02 Celleco Ab Discharge arrangement for use in a vortex-type separator

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2199518A (en) * 1986-12-30 1988-07-13 Coal Ind Separation of granular solid material
DE3741753A1 (en) * 1986-12-30 1988-07-14 Coal Industry Patents Ltd DEVICE AND METHOD FOR CLASSIFYING PARTICULATE SOLIDS
AU595970B2 (en) * 1986-12-30 1990-04-12 Larcodems (Bahamas) Limited Separation of granular solid material
GB2199518B (en) * 1986-12-30 1990-08-22 Coal Ind Separation of granular solid material
BE1002909A3 (en) * 1986-12-30 1991-07-30 Coal Industry Patents Ltd SEPARATION OF GRANULAR SOLID MATERIALS.
GB2231515A (en) * 1989-03-21 1990-11-21 Amoco Corp A hydrocyclone separation system
GB2331257A (en) * 1997-11-17 1999-05-19 John Mcculloch A mineral separation process
RU2479353C1 (en) * 2011-11-08 2013-04-20 Александр Александрович Буханков Dressing device
RU201832U1 (en) * 2020-08-14 2021-01-14 Общество с ограниченной ответственностью "ЮГТЕХМАШ" Dead-end heavy metals concentrator

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Publication number Publication date
GB8327618D0 (en) 1983-11-16
GB2147831B (en) 1986-03-05

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Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20031013