WO1999052637A1 - Procede et machine a traiter un conglomerat - Google Patents

Procede et machine a traiter un conglomerat Download PDF

Info

Publication number
WO1999052637A1
WO1999052637A1 PCT/IB1999/000604 IB9900604W WO9952637A1 WO 1999052637 A1 WO1999052637 A1 WO 1999052637A1 IB 9900604 W IB9900604 W IB 9900604W WO 9952637 A1 WO9952637 A1 WO 9952637A1
Authority
WO
WIPO (PCT)
Prior art keywords
conglomerate
nozzles
processing apparatus
eroding
fragmenting
Prior art date
Application number
PCT/IB1999/000604
Other languages
English (en)
Inventor
Andrew Joseph Vietti
George Mckinley Langefeld
Nico Van Zyl
Original Assignee
De Beers Consolidated Mines Limited
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 De Beers Consolidated Mines Limited filed Critical De Beers Consolidated Mines Limited
Priority to BR9909417-7A priority Critical patent/BR9909417A/pt
Priority to AU30470/99A priority patent/AU745251B2/en
Priority to CA002326316A priority patent/CA2326316C/fr
Publication of WO1999052637A1 publication Critical patent/WO1999052637A1/fr

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/06—Jet mills

Definitions

  • THIS invention relates to a method and apparatus for processing a conglomerate.
  • a conglomerate processing apparatus for processing a conglomerate of particles bound together by a binding medium, the apparatus comprising a moving conveyer having an upstream end for receiving the conglomerate, a downstream end. a first array of fragmenting nozzles for directing a corresponding series of fragmenting fluid jets onto the conglomerate to break it up, and a second array of eroding nozzles for directing a corresponding series of eroding fluid jets for eroding the binding medium from the broken up conglomerate to expose the individual particles.
  • the first array of fragmenting nozzles is configured to supply relatively narrow beam high intensity fluid jets
  • the second array of eroding nozzles is configured to supply relatively broad beam lower intensity fluid jets.
  • nozzle directing means are provided for controlling the movement and direction of the fragmenting and eroding fluid jets.
  • the fragmenting and eroding nozzle arrays are incorporated in at least one spray manifold.
  • the nozzle directing means includes transverse moving means for moving the spray manifold in a direction transverse to the direction of feed of the conveyer, and tilting means for adjusting the angle of tilt of the nozzles and/or the height of the nozzles above the conveyer.
  • first array of fragmenting nozzles is upstream of the second array of eroding nozzles.
  • the eroding nozzles are arranged to spray a fanned fluid jet having beamwidth ranging from 5° to 15°, and typically approximately 10°.
  • the fragmenting nozzles are arranged to spray a fluid jet which is substantially parallel, having a beamwidth of approximately 0°.
  • the spray manifold comprises at least one spray arm extending in the direction of feed of the conveyor, and including an upstream row of fragmenting nozzles and a downstream row of eroding nozzles
  • the tilting means including an axle extending transversely relative to the direction of feed, and supported on a trunnion arrangement, and actuating means for tilting the nozzles on the axle and adjusting the distance between the nozzles and the conveyor
  • the transverse moving means includes a support frame carrying the trunion arrangement on a free end thereof and pivot assembly for pivoting the support frame at a fixed end thereof about a substantially vertical axis so that the spray arm describes a transverse arc of coverage.
  • the spray manifold is supported on an overhead rotor arm assembly which rotates the spray manifold through 360° above the conveyor.
  • a pair of rotary spray manifolds are mounted rotatably towards opposite ends of the overhead rotor arm, the conglomerate processing apparatus including rotary drive means for rotating both the overhead rotor am and the rotary spray manifolds in concert.
  • rotary spray manifold comprises a manifold nozzle arm having a double arrowhead configuration.
  • each rotary spray manifold comprises a manifold nozzle disc carrying a plurality of eroding and/or fragmenting nozzles.
  • One rotary spray manifold may carry the array of fragmenting nozzles, and the other rotary spray manifold may carry the array of eroding nozzles.
  • the arrays of eroding and fragmenting nozzles are arranged in an alternating or other predetermined configuration on each of the spray manifolds.
  • the eroding and fragmenting nozzles are tilted at a fixed angle to the vertical.
  • a manifold bar carrying an array of nozzles extends transversely relative to the direction of feed and is located downstream of the spray manifold.
  • the manifold bar may carry an array of eroding nozzles, and the spray manifold may carry an array of fragmenting nozzles.
  • the conveyer may be provided with perforations sized to allow the passage of the binding medium once it has been washed off the particles.
  • the invention extends to a method of processing a conglomerate comprising a conglomerate of particles loosely bound together by a binding medium, the method comprising the steps of feeding the conglomerate onto a moving conveyer, directing a first array of high intensity fluid jets onto the conglomerate, the fluid jets being arranged to break up the conglomerate, and directing a second array of lower intensity fluid jets onto the broken up conglomerate, the second array of fluid jets being arranged to erode the binding medium from the particles to expose them for further processing.
  • the method includes the steps of moving the first and second arrays of fluid jets in a direction transverse to the direction of feed of the conveyer, and adjusting the tilt angle of the fluid jets so as to provide full coverage of the conglomerate as it travels along the conveyor.
  • Figure 1 shows a schematic top plan view of a first embodiment of a conglomerate processing apparatus of the invention
  • Figure 2 shows a schematic side view of the conglomerate processing apparatus of Figure 1;
  • Figure 3 shows a more detailed schematic top plan view of a typical spray manifold forming part of the conglomerate processing apparatus of Figures 1 and 2;
  • Figure 4 shows a side view of the spray manifold of Figure 3;
  • Figure 5 shows a pictorial view of a second embodiment of a conglomerate processing apparatus;
  • Figure 6 shows a more detailed pictorial view of a spray manifold used in the conglomerate processing apparatus of Figure 5;
  • Figure 7 shows a partly schematic underplan view of the spray manifold of Figure 6;
  • Figure 8 shows a pictorial view of a third embodiment of a conglomerate processing apparatus of the invention.
  • Figure 8A shows a partly schematic underplan view of a nozzle disc or head forming part of the spray manifold of Figure 8.
  • a conglomerate processing apparatus 10 includes a moving belt conveyer 12 having an upstream end 14 and a downstream end 16, with the direction of feed being indicated by arrow 18. Conglomerations of ore particles bound together by clay 20 and having an average conglomerate size ranging from 150mm to 300mm are fed onto the upstream end of the conveyer and are conveyed downstream for further processing.
  • a spray manifold 22 is carried on a pair of swing arms 24 arranged in a V- configuration, with the arms 24 in turn being mounted to a pivot assembly 26 which houses a reciprocating motor 29 which pivots the arms 24 and the manifold 22 in the direction of arrows 30, transverse to the direction of feed 18.
  • the pivot assembly is carried on a support frame 32 which is covered by a cowling 34.
  • the spray manifold 22 is illustrated in more detail in Figures 3 and 4, and comprises an H-shaped frame 36 which is journalled to a pair of trunnions 38 via a central shaft 40, with the trunnions 38 in turn being mounted to the arms 24.
  • a high pressure hose coupling 42 carrying water at a pressure of 30 to 60 MPa communicates with two upstream rows of fragmenting nozzles 44A and 44B and with two downstream rows of eroding nozzles 46A and 46B.
  • the nozzles 44A and 46A are raised to a height of 200mm to 400mm above the level of the conveyer 12.
  • the upstream rows of fragmenting nozzles are arranged to spray high pressure narrow beam parallel water jets 48 having a beamwidth as close to 0° as possible, whereas the eroding nozzles 46A are arranged to spray fanned water jets 50 having a relatively broad beamwidth of 5° to 15°, and preferably of 10°.
  • the fragmenting nozzles 44A have a diameter ranging from 2mm to 3.5mm.
  • the erosion nozzles 46A have a diameter ranging from 1.5mm to 3mm.
  • the conveyer belt 12 is provided with a matrix of perforations 52 which typically have a diameter of 1mm to 3mm, which allows the resultant clay and water slurry to wash through the perforations, whilst being sufficiently small to prevent the passage of ore recoverable particles.
  • the spray manifold is also able to tilt about an axis defined by the axle 40 in the direction of arrows 55.
  • the tilt angle is controlled by means of an hydraulic reciprocating ram 56 which is mounted to the overhead frame 32.
  • the distance between the different spray jets and the conglomerate can be controlled, which effectively controls the intensity of the jets.
  • the spray manifold may be tilted so that its upstream end is closer to the conveyer belt 12, as a result of which the more intense fragmenting jets 48 come into closer contact with the conglomerate.
  • the angle at which the jets strike the conglomerate is also varied by the tilting of the manifold, thereby increasing the effective area of coverage and angles of attack of the jets.
  • the downstream end of the manifold can be tilted downwards in a situation where significant quantities of clay still remain on the broken up conglomerate, thereby increasing the intensity of the eroding nozzles as well as their effective direction.
  • a second embodiment of a conglomerate processing apparatus 60 which includes a moving belt conveyer 62 having an upstream feed end 64 and a downstream end 66.
  • the moving belt conveyer is divided into troughs 68 by transverse partition walls 70 and side walls 72 to contain the consolidated clay particles, ore particles and slurry, with the clay slurry draining through perforations in the belt conveyer similar to the perforations 52 in Figure 1 and out through an exit aperture 74 at the base of the conveyer.
  • the belt conveyer is conventional, in that it has an upstream drive roller driven by a motor 76 via a reduction box 78, and an adjustable downstream idler roller 80.
  • An overhead spray manifold assembly 82 which is illustrated in more detail in Figures 6 and 7, includes a central rotor arm assembly 84 which is mounted rotatably about a central drive shaft 86 extending vertically from an overhead gantry 88.
  • the drive shaft is driven by a motor 90 via a drive chain or belt, which is indicated in broken outline at 92.
  • the drive shaft 86 is in turn arranged to rotate the rotor arm assembly 82 about a vertical axis 94.
  • manifold nozzle arms 96 and 98 are mounted rotatably to opposite ends of the rotor arm 84 on hollow vertical side shafts 100.
  • the side shafts 100 are arranged to rotate in concert with the central hollow drive shaft 86 via a pulley assembly 102 including drive chains or belts 104 and 106, whereby rotation of the drive shaft 86 in the direction of arrow 108 will cause the side shafts 100 to rotate in the same direction indicated by arrows 110 to rotate the manifold nozzle arms 96 and 98.
  • Each of the manifold nozzle arms 96 and 98 have a double arrowhead configuration, with an array of nozzles 112A, 112B, 112C, 112D, 112E, 112F, 112G and 112H extending downwardly from the arm 96.
  • a similar array of nozzles 114A, 114B, 114C, 114D, 114E, 114F, 114G and 114H extends downwardly from the underside of the manifold nozzle arm 98, and have the same configuration as nozzles 112A to 112H. Pressurized water is fed to the nozzles via the hollow shafts 86 and 100, which incorporate rotary seals (not shown).
  • all of the nozzles 112A to 112H are fragmenting nozzles, and the nozzles 114A to 114H are eroding nozzles.
  • eroding and fragmenting nozzles may alternate on each manifold nozzle arm.
  • the nozzles 112B, 112D. 112F and 112H may be eroding nozzles, with the same arrangement being applicable with respect to the nozzles 114A to 114H.
  • the cluster of nozzles 112A to 112D may be eroding nozzles, and the cluster of nozzles 1 12E to 112H on the opposite arrowhead may be eroding nozzles.
  • the nozzles are angled inwardly towards the side shafts 100 at an angle of 5 to 15°, and preferably at an angle of 10° to the vertical.
  • a downstream gantry frame 116 may be fitted with a tilted manifold bar 118 carrying an array of eroding nozzles 120 which are angled upstream at 10° to the vertical to erode the remains of clay adhering to the ore particles after the consolidated clay particles have been broken up and most of the clay has been removed by virtue of the rotary spray manifold assembly 82.
  • all of the upstream nozzles 112A to 112H and 114A to 114H may be fragmenting nozzles.
  • FIG. 8 and 8A an alternative embodiment of a conglomerate processing apparatus 120 is shown. For the sake of clarity, the main drive motor and pulley assembly have been removed. A rotary spray 11
  • manifold assembly 122 has a similar configuration to the spray manifold 82 of Figure 6, save that the manifold arms 96 and 98 are replaced by manifold discs 124 and 126.
  • an array of evenly spaced nozzles 128A, 128B, 128C, 128D, 128E, 128F, 128G and 128H are positioned on the underside of the outer periphery of each of the discs 124 and 126.
  • the nozzles are angled inwardly or outwardly at 10°, and, as was the case with the nozzles illustrated in Figures 6 and 7, fragmenting and eroding nozzles may alternate, or may be arranged in clusters such as nozzle clusters 128A to 128D and 128E to 128H.
  • High pressure couplings 130 are arranged to be fitted with high pressure hoses for directing water into each of the manifold discs 124 and 126.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Nozzles (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Disintegrating Or Milling (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Abstract

On décrit une machine à traiter un conglomérat de particules récupérables liées par un agglutinant, tel qu'un conglomérat (20) de minerai diamantifère enfoui dans de l'argile. La machine comprend une bande transporteuse mobile (12) présentant une extrémité amont pour recevoir le conglomérat, une extrémité aval, et un premier groupe amont de buses de fragmentation (44A) pour diriger une série correspondante de jets d'eau de fragmentation (48) sur le conglomérat (20) pour le pulvériser. Un deuxième groupe aval de buses (46A) dirige en éventail une série correspondante de jets d'eau d'érosion (50) pour éroder l'argile obtenur par la pulvérisation du conglomérat, afin d'exposer les particules isolées de minerai diamantifère (54). On décrit en outre un procédé de traitement d'un conglomérat.
PCT/IB1999/000604 1998-04-08 1999-04-08 Procede et machine a traiter un conglomerat WO1999052637A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BR9909417-7A BR9909417A (pt) 1998-04-08 1999-04-08 Aparelho e método para processamento de conglomerado
AU30470/99A AU745251B2 (en) 1998-04-08 1999-04-08 Method and apparatus for processing a conglomerate
CA002326316A CA2326316C (fr) 1998-04-08 1999-04-08 Procede et machine a traiter un conglomerat

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA982993 1998-04-08
ZA98/2993 1998-04-08

Publications (1)

Publication Number Publication Date
WO1999052637A1 true WO1999052637A1 (fr) 1999-10-21

Family

ID=25586942

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1999/000604 WO1999052637A1 (fr) 1998-04-08 1999-04-08 Procede et machine a traiter un conglomerat

Country Status (5)

Country Link
AU (1) AU745251B2 (fr)
BR (1) BR9909417A (fr)
CA (1) CA2326316C (fr)
RU (1) RU2232643C2 (fr)
WO (1) WO1999052637A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1017770C2 (nl) * 2001-04-04 2002-10-10 Paulus Franciscus Joha Lambert Asbest-reiniging.
EP1886765A1 (fr) * 2007-08-01 2008-02-13 Kama GmbH Procédé de support d'outil et dispositif de traitement de sections plates

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3124491A1 (de) * 1981-06-23 1983-01-27 Ingenieurbüro Horst Beyer, 6806 Viernheim Einrichtung zur ausscheidung von fremdstoffen
DE8603098U1 (de) * 1986-02-06 1986-03-27 Gebr. Bellmer GmbH + Co KG Maschinenfabrik, 7532 Niefern Reinigungsvorrichtung für ein Endlosband
US4907612A (en) * 1988-10-28 1990-03-13 National Semiconductor Corporation Universal material handling apparatus
WO1995009696A1 (fr) * 1993-10-05 1995-04-13 Oscar Wilje Procede, dispositif et composition pour aspersion de materiaux
DE19616035C1 (de) * 1996-04-23 1997-07-17 Rwk Kalk Ag Wasser-Bedüsungs-Vorrichtung zum Entfernen von Verunreinigungen auf stückigem Gut

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3124491A1 (de) * 1981-06-23 1983-01-27 Ingenieurbüro Horst Beyer, 6806 Viernheim Einrichtung zur ausscheidung von fremdstoffen
DE8603098U1 (de) * 1986-02-06 1986-03-27 Gebr. Bellmer GmbH + Co KG Maschinenfabrik, 7532 Niefern Reinigungsvorrichtung für ein Endlosband
US4907612A (en) * 1988-10-28 1990-03-13 National Semiconductor Corporation Universal material handling apparatus
WO1995009696A1 (fr) * 1993-10-05 1995-04-13 Oscar Wilje Procede, dispositif et composition pour aspersion de materiaux
DE19616035C1 (de) * 1996-04-23 1997-07-17 Rwk Kalk Ag Wasser-Bedüsungs-Vorrichtung zum Entfernen von Verunreinigungen auf stückigem Gut

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1017770C2 (nl) * 2001-04-04 2002-10-10 Paulus Franciscus Joha Lambert Asbest-reiniging.
EP1886765A1 (fr) * 2007-08-01 2008-02-13 Kama GmbH Procédé de support d'outil et dispositif de traitement de sections plates
WO2009016250A1 (fr) * 2007-08-01 2009-02-05 Kama Gmbh Dispositif porte-outil et dispositif pour usiner des pièces découpées plates
US8061242B2 (en) 2007-08-01 2011-11-22 Kama Gmbh Tool carrier device and apparatus for processing flat blanks
AU2008281716B2 (en) * 2007-08-01 2012-04-05 Kama Gmbh Tool carrier device and device for machining flat sections

Also Published As

Publication number Publication date
RU2232643C2 (ru) 2004-07-20
BR9909417A (pt) 2005-04-12
CA2326316A1 (fr) 1999-10-21
AU3047099A (en) 1999-11-01
AU745251B2 (en) 2002-03-14
CA2326316C (fr) 2007-11-13

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