WO2013108201A1 - Agencement d'exploitation de minerai - Google Patents

Agencement d'exploitation de minerai Download PDF

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Publication number
WO2013108201A1
WO2013108201A1 PCT/IB2013/050422 IB2013050422W WO2013108201A1 WO 2013108201 A1 WO2013108201 A1 WO 2013108201A1 IB 2013050422 W IB2013050422 W IB 2013050422W WO 2013108201 A1 WO2013108201 A1 WO 2013108201A1
Authority
WO
WIPO (PCT)
Prior art keywords
ore
arrangement
feed
handling arrangement
handling
Prior art date
Application number
PCT/IB2013/050422
Other languages
English (en)
Inventor
Gert Lukas DE WET
Joe Carel ALBRECHT
Original Assignee
Emtee Mining Engineering (Proprietary) 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 Emtee Mining Engineering (Proprietary) Limited filed Critical Emtee Mining Engineering (Proprietary) Limited
Publication of WO2013108201A1 publication Critical patent/WO2013108201A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/04—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices according to size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/14—Details or accessories
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B13/00—Grading or sorting solid materials by dry methods, not otherwise provided for; Sorting articles otherwise than by indirectly controlled devices
    • B07B13/14—Details or accessories
    • B07B13/16—Feed or discharge arrangements
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B1/00—Preliminary treatment of ores or scrap

Definitions

  • THIS invention relates to an ore handling arrangement suitable for use in mining applications, and more particularly but not exclusively, to an ore handling arrangement suitable for loading ore onto a conveyor belt, into an ore pass, or onto / into a bulk materials handling, transfer or transportation unit.
  • a rock face is drilled, charged with explosives and blasted in order to fragment. Fragmented ore so formed is the transported to a predetermined end destination. During each blast, some of the solid rock may not have fragmented down to a required size. These lumps of rock are regarded as oversized material and are either dumped or stockpiled. The oversized rocks may also be further drilled and blasted to fragment the rock to the required size. Both these methods are costly and inefficient as it requires double handling and/or re-drilling and blasting, which negatively affects production.
  • Conveyor belts are fed or loaded by means of LHD's (load haul dumpers) and / or dumper trucks. Dumping or discharging large amounts rocks, oversized rocks or great amounts of ore directly onto a conveyor belt may however result in damage to the conveyor belt. Oversized rocks also tend to become wedged in transfer chutes, and often result in the blockage of ore passes. Apart from damages resulting from the direct impact of the ore onto the conveyor belt, loading of oversized material also results in the conveyor belt being overloaded.
  • LHD's load haul dumpers
  • dumper trucks Dumping or discharging large amounts rocks, oversized rocks or great amounts of ore directly onto a conveyor belt may however result in damage to the conveyor belt. Oversized rocks also tend to become wedged in transfer chutes, and often result in the blockage of ore passes. Apart from damages resulting from the direct impact of the ore onto the conveyor belt, loading of oversized material also results in the conveyor belt being overloaded.
  • Uneven loading at the loading point will furthermore result in spillages and belt misalignment which in return may cause damage to other parts of the conveyor belt, in addition to being inefficient.
  • Belt rip and tears can also easily occur, with all the above problems resulting in downtime and production loss.
  • Ore passes are also frequently used to transport ore from one level to another.
  • An ore-pass is also fed or loaded by means of an LHD (load haul dumper) and / or dumper trucks as well as scraper winches.
  • LHD load haul dumper
  • Dumping or discharging large amounts rocks, oversized rocks or great amounts of ore directly into an ore-pass may cause the throat chute at the bottom of the ore-pass to block. Oversized rocks also tend to become wedged in transfer chutes. Blocked ore-passes are very dangerous as it requires blasting in order to clear the ore out. Save for the safety risk that this poses, it also results in downtime, and therefore production loss.
  • LHD's or dumper trucks are used to load the ore at the blasted face and transport it to the conveyor belt and/or ore pass, and then discharges the ore into what is known as a static grizzly tip.
  • These underground tips consist of a steel structure with four or more equally sized square holes.
  • the static grizzly tip is positioned above the conveyor belt and spans the width of the conveyor belt. The holes allow for the fine material and rock to fall through and the oversized rock remain behind on the grid, thus acting as a sieve or classifier.
  • An employee equipped with a sledge hammer or some means of hydraulic rock breaker, then manually fragments oversized rocks that remain behind on the static grizzly tip.
  • an ore handling arrangement including:
  • a feed arrangement for receiving the ore from an ore source, and for feeding ore to an ore destination, the feed arrangement including at least a feed chute;
  • the feed arrangement includes classification means that causes ore below a predetermined size to be removed from the ore feed prior to the ore being fed to the ore destination; with the classification means being in the form of apertures provided in a feed chute of the feed arrangement.
  • the apertures may be in the form of tapering slots.
  • the tapering slots may be defined by cutaway sections in a base of the feed chute.
  • the tapering slots may be defined by gaps between spaced apart beams that make up the feed chute.
  • the beams taper in width resulting in a concomitant tapering slot formed there between.
  • the tapering slot is provided for the tapering slot to be substantially V-shaped when seen in plan.
  • an initial zone of a slot is also provided for an initial zone of a slot to be of constant width, followed by a downstream tapering zone, thus resulting in a slot that is at least partially Y-shaped when viewed in plan.
  • the beams are triangular or inversely V-shaped when viewed in cross section in order for the tapering slots to be in the form of grooves that are at least partially V-shaped in cross section, and which also tapers along their height.
  • classifications means to be in the form of at least one row of apertures, with the apertures being of increasing or decreasing diameter in the direction of ore flow.
  • the classification means may comprise a combination of tapering slots and holes.
  • the feeding arrangement to include a non- perforated feeding zone upstream of the feeding chute.
  • a further feature of the invention provides for the feeding arrangement to include vibrating means adapted selectively to cause the feeding chute to vibrate.
  • the vibration of the feeding arrangement may cause the feeding chute to rotate, pivot, swivel, move up and down or sideways in an reciprocating manner.
  • a further feature of the invention provides for the ore handling arrangement to include a grid which is locatable downstream of the feeding arrangement, but operatively above a destination to which the ore is to be fed, in order to prevent oversize ore to be fed to the destination.
  • the grid may be in the form of a steel structure having a plurality of equally sized openings.
  • a still further feature of the invention provides for the ore handling arrangement to include breaking means for breaking oversize ore located on the grid into smaller fragments.
  • the breaking means may be in the form of a pneumatic or hydrauiically driven breaking tip positioned to enable the tip to engage ore located on the grid.
  • the breaking means is preferably designed for the breaking tip not to be displaceable beyond the periphery of the grid.
  • a still further feature of the invention provides for the ore handling arrangement to include a rock crushing arrangement located downstream of the grid and breaking means.
  • the ore destination may be an ore pass, a conveyor belt, a hopper or any other form of bulk material handling equipment.
  • the ore destination may also be a crushing arrangement referred to above.
  • the ore classification and breaking arrangement to be a mobile unit, and for the ore destination to be an ejecting bin that forms part of the mobile ore classification and breaking means.
  • the ore handling arrangement to be configured for ore removed through the classification means to bypass the grid, and to be fed directly to the ore destination.
  • Figure 1 is a perspective view of a first embodiment of an ore handling arrangement in accordance with the invention
  • Figure 2 is a side view of the ore handling arrangement of Figure 1 ;
  • Figure 3 is a perspective view of a second embodiment of an ore handling arrangement in accordance with the invention.
  • Figure 4 is a side view of the ore handling arrangement of Figure 3;
  • Figure 5 is a perspective view of a third embodiment of an ore handling arrangement in accordance with the invention.
  • Figure 6 is a side view of the ore handling arrangement of Figure 5;
  • Figure 7 is a perspective view of a fourth embodiment of an ore handling arrangement in accordance with the invention.
  • Figure 8 is a side view of the ore handling arrangement of Figure 7.
  • the arrangement 10 comprises a feed arrangement 30, a grid 40, an ore breaking means 50 as well as some form of ore destination, which takes different forms in the different embodiments.
  • the ore destination is in the form of a conveyor belt 21 , and the ore handling arrangement 10 is set up to be of an inline feeding arrangement.
  • a feeding arrangement 30 is provided for receiving the ore from an ore source (such a dumper truck or load haul dumper).
  • the feeding arrangement 30 of this embodiment includes a chute 31 having a feeding zone 31.1 and a classification zone 31.2, with the chute 31 being downwardly inclined form the feeding zone 31.1 towards the classification zone 31.2.
  • the classification zone 31.2 is defined by a number of apertures or slots 32 having been cut into the base plate making up the chute.
  • the slots are of an outwardly tapering configuration, and are therefore substantially V-shaped in plan, thus resulting in finer material to be let through at the apex of the V-shaped slot, and for gradually more coarse material to let through as the ore is conveyed longitudinally along the chute.
  • Ore being larger than a pre-determined diameter is then fed onto the grid 40, through which it falls onto the conveyor belt 21 (arrow B in Figure 2). However, oversize ore remains trapped on the grid.
  • the classification of the ore prior to being fed onto the grid 40 ensures that there is no build-up of fine material that can potentially clog the grid, and interfere with the ore breaking process discussed below. Ore that falls through the classification apertures 32 are fed directly onto the conveyor belt (arrow A in Figure 2), thus bypassing the grid 40.
  • the efficiency and accuracy of the classification process is increased by providing vibrating means (not shown) for causing the chute 31 to vibrate relative to the base 35 of the feed arrangement 30.
  • the chute is mounted on resilient supports 36, which are in turn mounted on the stationary base 35.
  • the breaking means 50 is typically in the form of a remotely operable breaking tip 51 that extends from a displaceable boom, which is in turn hydraulically or pneumatically actuated and operated by an operator remote from the grid.
  • the breaking tip 51 cannot be displaced beyond the perimeter of the grid 40, thus ensuring that the breaking means cannot be misused to manipulate large section of ore. The need to do this is in any event negated by the new feed arrangement 30, and in this way the life of the breaking means 50 can be extended.
  • the chute 31 of the feed arrangement is lined with wear-resistant liner plates (not shown).
  • the liner is not continuous, but comprises a number of smaller liner plate sections which can be independently replaced when worn out.
  • the integrity of the underlying structure i.e. the base of the chute
  • the size of the grid 40 (also known as a Grizzly in the trade) used in this new arrangement is much smaller than the average grid found on prior art equipment. This is primarily due to the fact that ore is not loaded onto the grid directly, but fed with a vibrating feeder which already removes a substantial amount of ore through its classification functionality.
  • the grid can furthermore be supplied with wing walls (not shown) in cases where waste material is not required to be broken or conveyed to the surface.
  • the breaking means 50 is also of a unique design. Contrary to other conventional rock breakers with designs incorporating telescopic rock breaker booms, the new rock breaker is designed as a short reach rock breaker. A short reach rock breaker reduces the strain and forces applied to the main articulating parts such as pins, cylinders and bushes. Because the vibrating feed arrangement moves ore towards the rock breaker and grid, a telescopic boom is not required. The short reach rock breaker restricts the operator only to break rocks which are in the grid area. The operator may control the flow of material in the feed arrangement by starting and stopping the feed to prevent accumulation of rocks. Due to a compact design, most operating forces and stresses are absorbed throughout the entire rock breaker, which is transferred to the rock breaker base and feeder bed. With the feeder bed securely pinned into footwall, it makes for a sound and sturdy foundation.
  • the ore handling arrangement is in the form of a rear feeding arrangement which is installed over the tail end and in-line with the conveyor belt 21.
  • the feed arrangement does not include a feeding zone, and ore is discharged directly onto inclined beams 34 that define the base of the feeding chute, with spaces between the beams 34 defining the classification apertures 32.
  • the beams 34 are of a lengthwise tapering nature, which results in the gaps there between also to be of an inversely tapering configuration.
  • the beams are triangular in cross-section, which also result in the gaps to be of tapering configuration from top to bottom.
  • the classification apertures therefore taper in two different planes, which result in three dimensional classification characteristics.
  • the classification apertures are V-shaped when viewed from the top, and are also V-shaped when viewed in cross- section.
  • the net effect of this configuration is that some degree of classification already takes placed in a localized manner, which improves the efficiency of the classification of the partially classified ore bed as the ore moves along the feeding chute.
  • FIG. 7 and 8 differs somewhat in that is in the form of a mobile unit mounted on a wheeled chassis 60, and which can therefore be transported to a required location.
  • the ore is loaded into an ejector bin 23 forming part of the mobile ore handling arrangement 10, which can be loaded by a LHD for storage or stockpiling.
  • Some other embodiments of the invention which is foreseen, but not described in detail, includes configurations where the feeding arrangement is used when loading ore onto a conveyor belt without necessarily followed by the grid and breaking means.
  • the ore may be loaded onto a conveyor belt which in turn feeds a further ore handling arrangement (including the grid and breaking means) referred to above.
  • the feeding arrangement is installed over, but perpendicular relative to the conveyor belt.
  • a LHD can then discharge ore onto the feeding arrangement, and classification takes place as described in the applications above.
  • the same LHD collects the ore in its bucket, which oversize materials can then be moved to a stockpile or dumping area.
  • the ore may also be loaded onto a conveyor belt which in turn feeds a further ore handling arrangement (including the grid and breaking means) referred to above.
  • the feeding arrangement is also installed over, but perpendicular relative to the conveyor belt.
  • a winch and scraper is configured to displace the ore towards and onto the feeding arrangement.
  • the scraper will pull the ore from an operatively lower part of the feeding arrangement towards an operatively upper part of the feeding arrangement, which is a different direction of ore flow compared to all the other embodiments described above.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chutes (AREA)

Abstract

La présente invention concerne un agencement d'exploitation de minerai approprié pour une utilisation dans des applications minières et, plus particulièrement, mais pas exclusivement, un agencement d'exploitation de minerai approprié pour le chargement de minerai sur un convoyeur à bande, dans un passage de minerai, ou sur/dans une unité d'exploitation, de transfert ou de transport de matériau en vrac. L'agencement d'exploitation de minerai comprend un agencement d'avance destiné à recevoir le minerai provenant d'une source de minerai, et à avancer le minerai vers une destination de minerai, l'agencement d'avance comprenant au moins une goulotte d'avance. L'agencement d'avance comprend un moyen de tri qui provoque l'élimination d'une taille prédéterminée, ou d'une taille inférieure à une taille prédéterminée, du minerai alimenté avant la délivrance du minerai à la destination de minerai ; le moyen de tri ayant la forme d'ouvertures réalisées dans une goulotte d'avance de l'agencement d'alimentation.
PCT/IB2013/050422 2012-01-18 2013-01-17 Agencement d'exploitation de minerai WO2013108201A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA2012/00391 2012-01-18
ZA201200391 2012-01-18

Publications (1)

Publication Number Publication Date
WO2013108201A1 true WO2013108201A1 (fr) 2013-07-25

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106247802A (zh) * 2016-08-30 2016-12-21 山东钢铁股份有限公司 一种烧结中和料过滤装置
CN112221982A (zh) * 2020-09-26 2021-01-15 倪国明 一种基于智能制造理念的采矿用井道输送装置
WO2021222981A1 (fr) * 2020-05-05 2021-11-11 Leschenault Industries Pty Ltd Système de broyage de site minier et méthodologie
GB2547669B (en) * 2016-02-24 2022-04-13 Mcquaid Eng Ltd A boom system for breaking and manoeuvring oversize material

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB290276A (en) * 1927-05-12 1929-10-14 Rembrandt Peale Improvements in or relating to the separation of intermixed divided materials

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB290276A (en) * 1927-05-12 1929-10-14 Rembrandt Peale Improvements in or relating to the separation of intermixed divided materials

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2547669B (en) * 2016-02-24 2022-04-13 Mcquaid Eng Ltd A boom system for breaking and manoeuvring oversize material
CN106247802A (zh) * 2016-08-30 2016-12-21 山东钢铁股份有限公司 一种烧结中和料过滤装置
WO2021222981A1 (fr) * 2020-05-05 2021-11-11 Leschenault Industries Pty Ltd Système de broyage de site minier et méthodologie
AU2021267559B2 (en) * 2020-05-05 2023-02-16 Leschenault Industries Pty Ltd Mine site comminution arrangement and methodology
CN112221982A (zh) * 2020-09-26 2021-01-15 倪国明 一种基于智能制造理念的采矿用井道输送装置

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