CA1116557A - Particulate separator with endless mesh belt and mono layer forming means - Google Patents
Particulate separator with endless mesh belt and mono layer forming meansInfo
- Publication number
- CA1116557A CA1116557A CA000309478A CA309478A CA1116557A CA 1116557 A CA1116557 A CA 1116557A CA 000309478 A CA000309478 A CA 000309478A CA 309478 A CA309478 A CA 309478A CA 1116557 A CA1116557 A CA 1116557A
- Authority
- CA
- Canada
- Prior art keywords
- belt
- separator
- mono layer
- mesh belt
- rollers
- 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
Links
Landscapes
- Separation Of Solids By Using Liquids Or Pneumatic Power (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
THIS INVENTION provides a separator for benificiating a particulate feed and comprising a mesh belt following a pre-determined path past an inspection apparatus and an ejector oper-able by a suitable control system and wherein vibrating means for the belt is provided adjacent a feed zone thereof.
THIS INVENTION provides a separator for benificiating a particulate feed and comprising a mesh belt following a pre-determined path past an inspection apparatus and an ejector oper-able by a suitable control system and wherein vibrating means for the belt is provided adjacent a feed zone thereof.
Description
3~ 5 5'~
THIS INVENTI0~l relates to a diamond or like separator suitable for use in obtaining a concentrate oF diamonds from d;a,n~ S
~n~Tfbr~g material fed to the separator.
Various separators are available which comprise a belt on to which the material to be concentrated is fed and which then carries the mater1al past an inspection point. At the inspection point an X-ray or other suitable device senses the presence of any diamonds for example and through the action oF a control mechanism activates means for removing such sensed diamonds or the Like. In one such device a mesh belt has been used to support the material from which a concentrate is to be separated and the means for removing the sensed diamonds has been an ejector operating on the principle of ejecting a jet of a licluid through the belt to cause the diamonds and other materials forming the concentrate to leave the belt. The diamonds and other material are thus,collected in a separate outlet channel from the separating clevice.
However, the prior art devices have suFfered from a dis-advantage in that difficulty has been experienced ~lith obtaining substantially a mono layer of particles on the belt so that effective separation can take place. In the prior art separator mentioned above a feeding device has been used to feed a mono layer on to the belt and this, in applicant 1 5 opinion, has been successful to a large extent.
It is a primary object of this invention to provide a separator of the above described type wherein a layer of material on such a belt is formed in an improved manner.
A ~cond object of ~his invention is to provide a separator of this type wherein the ejector is different-ly operated and also the path of the belt is designed to improve the separation characteristics between the concentrate and tailings.
In accordance with this invention there is provided a ~eparator for ~eparating particles having a particular detsctable characteristic from particles not having that cbaracteristic comprising; an endless mesh belt ~aving an upper load carrying surface, a feed zone at one end of the upper lo~d carrying surface - including particle feeding means for feeding particulate material onto the upper load carrying surface of the belt;
mono layer forming means for forming the particulate material into ~ubstantially a mono layer on the upper load carrying surface, said means including means or ~i7 vibrating ~he endless mesh belt in ~he region of ~he feed zone; insp~ction apparatus for detecting particules having the particular characteristics and loca~ed remote from the mono layer forming means; and an ejector for s removing particules baving the particular characteristic detected by the inspection apparatus from the endless mesh belt, the ejector being located further from the mono layer forming means ~han the inspection appara~us.
In a preferred embodiment disclosed herein~
water sprays are located over the belt in the area in which the vibration means are provided. Also the vibration means comprise a plurality of rollers supporting the belt in thi~ region. The rollers are either carried by a supporti~g ~tructure to which is attached a vibrator or the ro].lers are eccentrically unted on their axles. -/
/
/
3a Preferably the separator of the above described general type has its belt supported between the in~pection point and ejection point by a plurality of rollers which support the belt in a downwardly directed arcuate path which is located above the normal free fall trajectory of material from the last point where it is moving substantially horizontally at the speed of the belt.
. It will be understood therefore that the speed of the lo helt is a critical design factor when designing the arcuate down-ward1y extending path followed by the belt between the inspection point and the ejection point. In general the belt is made to move sufficiently fast to prevent material from rolling down the belt in the downwardly extendin~ region thereof near the ejector.
The aboYe and other features of the invention will be more fully understood from the following description of one embodiment of the invention. In ~his description reference will be made to the accompanying diagramm~tic drawing which illustrates a separator particularly designed for the separation of plus 2 m~
~o . size diamondiferous material.
In this embodiment of the invention an endless mesh belt 1 follows a path which provides a horizontal zone 2 at the one end of which is located the inspection point 3 and at the other end of which is located the feed region 4. Clearly the direction of move-ment of the belt is from the feed region 4 towards the inspection point 3. In between the feed region ~ and -the inspection point 3 the belt is supported on a plurality of rollers S which in this case are eccentrically mounted on their axles 6 such that the belt is vibrated in this region. The rollers could equally well be con-centrically mounted to a ~rame or the like to which is attached a conventional vibrator which would have the same effect of vibra-ting the belt.
Immediately above the supporting rollers 5 are a series of water sprays which, during operation of the separator~ wash undersized particles through the mesh belt and into a laterally extending chute 7. It will be understood that the coarseness of the mesh belt is chosen to requirements and in this particular J;a~ ous instance it is chosen to retain plus 2 mm sized ~hama~Fe-e~e material. The undersized material passes through the mesh belt re~ red and must be treated in any other req~T~ manner which could, for example, be on a similar separator adapted to treat smaller particles of material. The maximum size of particles to be treated on a single separator is not really limited but in general 10 mm would be about the largest for this type of separator.
Moving in the direction in which the belt moves past the inspection point; the belt, shortly thereafter, is directed downwardly in an arcuate path so as to provide a maximum angle "alpha" with the horizontal at the point where the ejector 8 operates. The belt is supported in this path by a plurality of rollers 9 which are arranged in the required path which is dependant 5i7 to a large extent upon the speed o-f operation of the mesh belt.
This pa-th is such that over the entire downwardly extending region of the belt it is located well above the normal trajectory which is indicated by dot-ted lines 10 for the material on the belt at the belt's partic~lar speed. As mentioned above the speed of the belt is chosen so that at the angle "alpha" and with the belt moving at the particular speed, particles on the belt do not roll down the inclined region thereo-f.
A dividing plate 11 is located just below the ejector 8 so that it collects and feeds into a separate concentrate path 12 the material ejected by the ejector. It is to be noted that in this particular embodirr~ent of the invention the ejector is pneumat-ically operated as opposed to those which normally operate on a liquid stream. Material not ejected by the ejector so as to move laterally into the passage 12 for the concentrate passes beneath the dividing plate 11 and falls down a tailings chute 13.
At this position the belt passes around a drive pulley and a second horizontal section 14 thereof is subjected to water sprays 15 from the inside of the belt. These water sprays are adapted to wash o-ff any material which is stuck to the belt and this material will then pass together with the water down a separate chute 16 and these tailings together with the undersized particles separated at the rollers 5 could be fed out o-f the separator together.
~16~;5~
~hilst not forming a particular feature of -the invention i-t should be mentioned that the passage 12 for the concentrate is provided at its top end on the side thereof opposite the ejector with a flexible impact absorbing shee-t 17 in order to prevent the diamonds From bouncing around in the passage and possibly from escaping from the mouth thereof.
It will be understood that many variations may be made to the above described embodiment oF the invention without depar-t-ing From the scope hereof. Such variations will be quite apparent to those skilled in the art and will not be.described further herein.
THIS INVENTI0~l relates to a diamond or like separator suitable for use in obtaining a concentrate oF diamonds from d;a,n~ S
~n~Tfbr~g material fed to the separator.
Various separators are available which comprise a belt on to which the material to be concentrated is fed and which then carries the mater1al past an inspection point. At the inspection point an X-ray or other suitable device senses the presence of any diamonds for example and through the action oF a control mechanism activates means for removing such sensed diamonds or the Like. In one such device a mesh belt has been used to support the material from which a concentrate is to be separated and the means for removing the sensed diamonds has been an ejector operating on the principle of ejecting a jet of a licluid through the belt to cause the diamonds and other materials forming the concentrate to leave the belt. The diamonds and other material are thus,collected in a separate outlet channel from the separating clevice.
However, the prior art devices have suFfered from a dis-advantage in that difficulty has been experienced ~lith obtaining substantially a mono layer of particles on the belt so that effective separation can take place. In the prior art separator mentioned above a feeding device has been used to feed a mono layer on to the belt and this, in applicant 1 5 opinion, has been successful to a large extent.
It is a primary object of this invention to provide a separator of the above described type wherein a layer of material on such a belt is formed in an improved manner.
A ~cond object of ~his invention is to provide a separator of this type wherein the ejector is different-ly operated and also the path of the belt is designed to improve the separation characteristics between the concentrate and tailings.
In accordance with this invention there is provided a ~eparator for ~eparating particles having a particular detsctable characteristic from particles not having that cbaracteristic comprising; an endless mesh belt ~aving an upper load carrying surface, a feed zone at one end of the upper lo~d carrying surface - including particle feeding means for feeding particulate material onto the upper load carrying surface of the belt;
mono layer forming means for forming the particulate material into ~ubstantially a mono layer on the upper load carrying surface, said means including means or ~i7 vibrating ~he endless mesh belt in ~he region of ~he feed zone; insp~ction apparatus for detecting particules having the particular characteristics and loca~ed remote from the mono layer forming means; and an ejector for s removing particules baving the particular characteristic detected by the inspection apparatus from the endless mesh belt, the ejector being located further from the mono layer forming means ~han the inspection appara~us.
In a preferred embodiment disclosed herein~
water sprays are located over the belt in the area in which the vibration means are provided. Also the vibration means comprise a plurality of rollers supporting the belt in thi~ region. The rollers are either carried by a supporti~g ~tructure to which is attached a vibrator or the ro].lers are eccentrically unted on their axles. -/
/
/
3a Preferably the separator of the above described general type has its belt supported between the in~pection point and ejection point by a plurality of rollers which support the belt in a downwardly directed arcuate path which is located above the normal free fall trajectory of material from the last point where it is moving substantially horizontally at the speed of the belt.
. It will be understood therefore that the speed of the lo helt is a critical design factor when designing the arcuate down-ward1y extending path followed by the belt between the inspection point and the ejection point. In general the belt is made to move sufficiently fast to prevent material from rolling down the belt in the downwardly extendin~ region thereof near the ejector.
The aboYe and other features of the invention will be more fully understood from the following description of one embodiment of the invention. In ~his description reference will be made to the accompanying diagramm~tic drawing which illustrates a separator particularly designed for the separation of plus 2 m~
~o . size diamondiferous material.
In this embodiment of the invention an endless mesh belt 1 follows a path which provides a horizontal zone 2 at the one end of which is located the inspection point 3 and at the other end of which is located the feed region 4. Clearly the direction of move-ment of the belt is from the feed region 4 towards the inspection point 3. In between the feed region ~ and -the inspection point 3 the belt is supported on a plurality of rollers S which in this case are eccentrically mounted on their axles 6 such that the belt is vibrated in this region. The rollers could equally well be con-centrically mounted to a ~rame or the like to which is attached a conventional vibrator which would have the same effect of vibra-ting the belt.
Immediately above the supporting rollers 5 are a series of water sprays which, during operation of the separator~ wash undersized particles through the mesh belt and into a laterally extending chute 7. It will be understood that the coarseness of the mesh belt is chosen to requirements and in this particular J;a~ ous instance it is chosen to retain plus 2 mm sized ~hama~Fe-e~e material. The undersized material passes through the mesh belt re~ red and must be treated in any other req~T~ manner which could, for example, be on a similar separator adapted to treat smaller particles of material. The maximum size of particles to be treated on a single separator is not really limited but in general 10 mm would be about the largest for this type of separator.
Moving in the direction in which the belt moves past the inspection point; the belt, shortly thereafter, is directed downwardly in an arcuate path so as to provide a maximum angle "alpha" with the horizontal at the point where the ejector 8 operates. The belt is supported in this path by a plurality of rollers 9 which are arranged in the required path which is dependant 5i7 to a large extent upon the speed o-f operation of the mesh belt.
This pa-th is such that over the entire downwardly extending region of the belt it is located well above the normal trajectory which is indicated by dot-ted lines 10 for the material on the belt at the belt's partic~lar speed. As mentioned above the speed of the belt is chosen so that at the angle "alpha" and with the belt moving at the particular speed, particles on the belt do not roll down the inclined region thereo-f.
A dividing plate 11 is located just below the ejector 8 so that it collects and feeds into a separate concentrate path 12 the material ejected by the ejector. It is to be noted that in this particular embodirr~ent of the invention the ejector is pneumat-ically operated as opposed to those which normally operate on a liquid stream. Material not ejected by the ejector so as to move laterally into the passage 12 for the concentrate passes beneath the dividing plate 11 and falls down a tailings chute 13.
At this position the belt passes around a drive pulley and a second horizontal section 14 thereof is subjected to water sprays 15 from the inside of the belt. These water sprays are adapted to wash o-ff any material which is stuck to the belt and this material will then pass together with the water down a separate chute 16 and these tailings together with the undersized particles separated at the rollers 5 could be fed out o-f the separator together.
~16~;5~
~hilst not forming a particular feature of -the invention i-t should be mentioned that the passage 12 for the concentrate is provided at its top end on the side thereof opposite the ejector with a flexible impact absorbing shee-t 17 in order to prevent the diamonds From bouncing around in the passage and possibly from escaping from the mouth thereof.
It will be understood that many variations may be made to the above described embodiment oF the invention without depar-t-ing From the scope hereof. Such variations will be quite apparent to those skilled in the art and will not be.described further herein.
Claims (6)
1. A separator for separating particles having a particular detectable characteristic from particles not having that characteristic comprising:
an endless mesh belt having an upper load carry-ing surface, a feed zone at one end of the upper load carry-ing surface including particle feeding means for feeding particulate material onto the upper load carrying surface of the belt;
mono layer forming means for forming the particul-ate material into substantially a mono layer on the upper load carrying surface, said means including means for vibrating the endless mesh belt in the region of the feed zone;
inspection apparatus for detecting particles having the particular characteristic and located remote from the mono layer forming means; and an ejector for removing particles having the particular characteristic detected by the inspection apparatus from the endless mesh belt, the ejector being located further from the mono layer forming means than the inspection apparatus.
an endless mesh belt having an upper load carry-ing surface, a feed zone at one end of the upper load carry-ing surface including particle feeding means for feeding particulate material onto the upper load carrying surface of the belt;
mono layer forming means for forming the particul-ate material into substantially a mono layer on the upper load carrying surface, said means including means for vibrating the endless mesh belt in the region of the feed zone;
inspection apparatus for detecting particles having the particular characteristic and located remote from the mono layer forming means; and an ejector for removing particles having the particular characteristic detected by the inspection apparatus from the endless mesh belt, the ejector being located further from the mono layer forming means than the inspection apparatus.
2. A separator as claimed in claim 1 in which water sprays are located over the belt in the area in which the vibration means are provided.
3. A separator as claimed in claim 1 in which the vibration means comprises a plurality of rollers supporting the belt in said region.
4. A separator as claimed in claim 3 in which the rollers are carried by a supporting structure to which a vibrator is attached.
5. A separator as claimed in claim 3 in which the rollers are eccentrically mounted on their axles.
6. A separator as claimed in claim 1 in which the mesh belt follows a predetermined path past an inspection apparatus and an ejector operable by a suitable control system, the belt being supported between the inspection point and ejection point by a plurality of rollers which support the belt in a downwardly directed arcuate path which is located above the normal free fall trajectory of material from the last point where it is moving substantially horizontally at the speed of the belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000309478A CA1116557A (en) | 1977-08-16 | 1978-08-16 | Particulate separator with endless mesh belt and mono layer forming means |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA77/4349 | 1977-08-16 | ||
| CA000309478A CA1116557A (en) | 1977-08-16 | 1978-08-16 | Particulate separator with endless mesh belt and mono layer forming means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1116557A true CA1116557A (en) | 1982-01-19 |
Family
ID=4112139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000309478A Expired CA1116557A (en) | 1977-08-16 | 1978-08-16 | Particulate separator with endless mesh belt and mono layer forming means |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1116557A (en) |
-
1978
- 1978-08-16 CA CA000309478A patent/CA1116557A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |