WO2008065632A1 - Procédé et appareil destinés à optimiser l'utilisation de la capacité de traitement d'une usine de traitement de matériau - Google Patents

Procédé et appareil destinés à optimiser l'utilisation de la capacité de traitement d'une usine de traitement de matériau Download PDF

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Publication number
WO2008065632A1
WO2008065632A1 PCT/IB2007/054872 IB2007054872W WO2008065632A1 WO 2008065632 A1 WO2008065632 A1 WO 2008065632A1 IB 2007054872 W IB2007054872 W IB 2007054872W WO 2008065632 A1 WO2008065632 A1 WO 2008065632A1
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WO
WIPO (PCT)
Prior art keywords
processing
grade
process material
particle size
middling
Prior art date
Application number
PCT/IB2007/054872
Other languages
English (en)
Inventor
Grahame Alan Hetherington
Andrew Jakins
Original Assignee
Adp Projects (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 Adp Projects (Proprietary) Limited filed Critical Adp Projects (Proprietary) Limited
Publication of WO2008065632A1 publication Critical patent/WO2008065632A1/fr

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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
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
    • 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
    • B07B13/18—Control

Definitions

  • This invention relates to a method and apparatus for optimising the utilization of the processing capacity of a material processing plant.
  • the particle size cut-off point according to which the material is graded is selected taking into account the anticipated or design particle size distribution throughout the process material and the processing capacity of each processing unit in order to maximize utilization of the processing capacity of both processing units.
  • the actual particle size distribution must be exactly the same as the design particle size distribution and remain constant. In practice, however, the particle size distribution varies, often significantly, within a range of sizes. In order to address the problem of the actual particle size distribution not matching the design particle size distribution, a number of approaches have been taken, such as:
  • a middling grade having a material property between that of the first and second grades and which can be processed at optimal efficiency by both of the first and second processing units;
  • the method may include sorting the process material into grades according to particle size distribution, with the first grade having a relatively finer particle size distribution, the second grade having a relatively coarser and the middling grade having a particle size distribution between that of the first and second grades.
  • sorting means for sorting the process material prior to processing by the material processing plant, into:
  • a middling grade having a material property between that of the first and second grades and which can be processed at optimal efficiency by both of the first and second processing units;
  • first flow directing means for directing the first grade process material to a first processing stream for processing by the first processing unit
  • second flow directing means for directing the second grade process material to a second processing stream for processing by the second processing unit
  • the sorting means may be operable to sort the process material into grades according to particle size distribution wherein the first grade has a relatively finer particle size distribution, the second grade has a relatively coarser particle size distribution and the middling grade has a particle size distribution between that of the first and second grades.
  • Figure 1 shows a schematic block flow diagram illustrating a prior art process for sorting a solids-containing flowable process material prior to processing the material in a material processing plant
  • Figure 2 shows a schematic block flow diagram illustrating a method of optimising the utilization of the processing capacity of a material processing plant, in accordance with the invention
  • FIG. 3 shows a schematic perspective view of an apparatus in accordance with the invention
  • Figure 4 shows a schematic sectional perspective view of the apparatus of Figure 3, sectioned along section line IV-IV of Figure 3;
  • Figure 5 shows a schematic sectional perspective view of the apparatus of Figure 3, sectioned along section line V-V of Figure 3;
  • Figure 6 shows a schematic side view of the apparatus of Figure 3;
  • Figure 7 shows a schematic top plan view of the apparatus of Figure 3
  • Figure 8 shows a schematic sectional end view of the apparatus of Figure 3, sectioned along section line VIII-VIII of Figures 6 and 7;
  • Figure 9 shows a schematic sectional end view of the apparatus of Figure 3, sectioned along section line IX-IX of Figures 6 and 7;
  • Figure 10 shows a schematic sectional end view of the apparatus of Figure 3, sectioned along section line X-X of Figures 6 and 7;
  • Figure 1 1 shows a schematic perspective view from one side, of the reservoirs of the apparatus of Figure 3;
  • Figure 12 shows another schematic perspective view from an opposite side, of the reservoirs of the apparatus of Figure 3;
  • Figure 13 shows a schematic sectional perspective view of the reservoirs of the apparatus of Figure 1 , sectioned along section line XIII-XIII of Figure 12.
  • Table 1 illustrates the variation in the actual particle size distribution of head feed process material compared to the design particle size distribution
  • Table 2 provides data illustrating a comparison of the overall capacity utilization of the prior art material processing method depicted in Figure 1 with that of the method in accordance with the present invention depicted in Figure 2.
  • FIG. 1 of the drawings a prior art method of processing a solids-containing flowable process material of variable size, prior to processing the material in a material processing plant, is illustrated.
  • the head feed supply of process material which, in this instance, is mined ore such as kimberlite or alluvium having a size range from A mm to G mm, is fed into a sizing facility where the feed material is graded into two size fractions or grades. More particularly, the process material is sized into a fine size fraction and a coarse size fraction at a particle size cut-off point of D mm.
  • the fine size fraction contains particle sizes ranging in size from A mm to particle sizes of less than D mm, whereas the coarse size fraction contains particles having particle sizes of D mm to G mm.
  • the fine size fraction is conveyed to process stream No. 1 which has a maximum processing capacity of 50 tons per hour (tph).
  • the coarse size fraction is conveyed to process stream No. 2 having a maximum processing capacity of 70 tph.
  • the process material in process streams No. 1 and No. 2 is processed separately in processing units No. 1 and No. 2, respectively.
  • the particle size cut-off point and the processing capacity of each of the two processing units is determined by the anticipated particle size distribution ("PSD") of the mined ore in order to achieve full capacity utilization of both processing units. In practice, however, the PSD varies, often significantly, within a range of sizes. It will be appreciated that processing unit No. 1 is operable to process the process material of process stream No.
  • processing unit No. 2 is operable to process the process material of process stream No. 2 but is not capable of processing the finer process material of process stream No. 1 at optimal efficiency.
  • the process material in this example is dense media in the form of mined ore such as kimberlite or alluvium, having a variable particle size.
  • a single head feed of the process material having a particle size range between A mm to G mm is conveyed to a sizing facility (1 ) in which the process material is sized into three size fractions or grades. More particularly, the sizing facility sorts the process material into a fine size fraction having a size range of A mm to C mm, a middling size fraction from C mm to E mm and a coarse size fraction of E mm to G mm.
  • the three size fractions are fed into surge bins (2), (3) and (4), respectively.
  • the fine size fraction is conveyed from the fine fraction surge bin (2) to process stream No. 1 (5), whereas the coarse size fraction is conveyed from the coarse fraction surge bin (4) to process stream No. 2 (6).
  • the maximum processing capacity of process stream No. 1 is 50 tph and the maximum processing capacity of process stream No. 2 is 70 tph.
  • Processing unit No. 1 (7) which forms part of a material processing plant, is operable to process the process material in process stream No. 1.
  • Process material in process stream No. 2 is conveyed to processing unit No. 2 (8) at the material processing plant, for processing by processing unit No. 2.
  • the middling size fraction of the process material is conveyed from the middling fraction surge bin (3) to one of the process stream No. 1 and the process stream No. 2 for processing in one of the processing unit No. 1 or the processing unit No. 2.
  • processing unit No. 1 is operable to process the fine size fraction and the middling size fraction at optimal efficiency
  • processing unit No. 2 is operable to process the coarse size fraction and the middling size fraction at optimal efficiency.
  • the processing unit No. 1 is, however, not capable of processing the coarse size fraction at optimal efficiency, and the processing unit No. 2 is not capable of processing the fine size fraction at optimal efficiency.
  • the middling size fraction is directed from the middling fraction surge bin (3) to the process stream No. 1 and to the process stream No. 2 in amounts relatively proportional to the available processing capacity of each of the first and second processing units. This permits the flow of middling size fraction process material to be balanced between process stream No. 1 and process stream No. 2 so as to maximise utilization of the processing capacity of both of the processing unit No. 1 and the processing unit No. 2.
  • Examples of the actual variation of PSD of a head feed of process material compared to a design PSD are provided.
  • a first example (“Case I")
  • the actual PSD of the head feed is generally finer than the design PSD.
  • the actual PSD of the head feed is generally coarser than the design PSD.
  • the cut point is a particle size of 8 mm.
  • Table 2 shows the effect on overall processing capacity utilization as the PSD of the head feed becomes finer (Case I) or coarser (Case II) than the design PSD.
  • the processing capacity of process unit No. 1 is fully utilized as relatively more feed material falls into the size range A mm to D mm.
  • the maximum overall capacity utilization of the processing units is achieved by simply varying the amount of the middling size fraction which is directed to process stream No. 1 and process stream No. 2 to top up the finer size fraction and the coarse size fraction, respectively.
  • the middling size fraction is directed to the processing stream No. 1 and No. 2 whenever excess processing capacity becomes available thereby to achieve optimal processing efficiencies and maximum overall utilization of the processing capacity of the processing units over a wide variation in the PSD of the head feed.
  • the Applicant believes that implementation of the method defined hereinabove in accordance with the present invention, will result in significant cost savings in capital expenditure on processing units as processing units need not be over-sized in terms of processing capacity in order to cater for variations in PSD. Furthermore, the operating costs associated with oversized installations will be obviated. The method also reduces the risk of bottlenecking and other problems occurring during a material processing operation, due to variations in the PSD of the feed material.
  • an apparatus for optimising the utilization of the processing capacity of a material processing plant is designated generally by the reference numeral 10.
  • the apparatus 10 is adapted for use in implementing the method in accordance with the invention, described hereinabove and illustrated in Figure 2.
  • the apparatus 10 is operable to sort the dense media process material prior to processing of the process material in process units No. 1 and No. 2 of the material processing plant.
  • the apparatus 10 comprises, broadly, a first surge reservoir 12, a second surge resorvoir 14, sorting means in the form of a shaker 16 and a frame 18.
  • the surge reservoir 12 feeds the processing stream No. 1 with process material and the surge reservoir 14 feeds the processing stream No. 2 with process material.
  • each reservoir 12 and 14 is defined by walls 32.
  • the first reservoir 12 and the second reservoir 14 are located adjacent one another and divided by a dividing wall 20.
  • the shaker 16 is located on the frame 18 in an arrangement wherein it extends longitudinally along the dividing wall 20.
  • the shaker 16 includes a coarse sieve 22 and a fine sieve 24.
  • the shaker 16 is fed from a head feed supply of the process material which is fed onto the coarse sieve 22 via a hopper (not shown).
  • the coarse sieve 22 is disposed above the fine sieve 24.
  • the sieves 22 and 24 are inclined slightly to assist process material which is too large to pass through a particular one of the sieves 22,24 to travel downwards along the sieve when shaken.
  • process material which is sized larger than the perforations in the coarse sieve 22 collects on the coarse sieve 22 and travels along the sieve until it drops off the lower end of the coarse sieve at region 40.
  • the apparatus 10 includes first flow directing means in the form of a slanted plate 26 which is located below region 40. The plate 26 extends between the dividing wall 20 and the upper ends of the reservoirs 12, 14. Coarse size fraction process material which drops from the shaker 16 along region 40 falls onto the plate 26 which directs the coarse size fraction to the first surge reservoir 12.
  • the fine sieve 24 allows process material having a size less than perforations in the fine sieve 24 (i.e the fine size fraction having a PSD of A mm to C mm) to fall through the fine sieve 24, along a region 44.
  • the apparatus 10 includes second flow directing means in the form of a slanted plate 30 which is located under region 44. The plate 30 extends between the dividing wall 20 and the upper ends of the reservoirs 12, 14. Fine size fraction process material which drops from the shaker 16 along region 44 falls onto the plate 30 which directs the fine size fraction to the second surge reservoir 14.
  • the process material which is small enough to pass through the coarse sieve 22, but too large to pass through the fine sieve 24 i.e. the middling size fraction having a PSD of C mm to E mm
  • the middling size fraction having a PSD of C mm to E mm is discharged along a region 42 into the reservoirs 12, 14 via a chute 36.
  • the throat of the chute 36 is intersected and divided in half by part 28 of the dividing wall 20.
  • the part 28 is as high, or slightly higher, than the lower end of the chute.
  • part of the middling grade material is discharged into the first reservoir 12 and part of the middling grade material is discharged into the second reservoir 14.
  • the chute 36 and part 28 of the dividing wall 20 intersecting the chute thus provide balancing means for balancing the amount of process material within the surge reservoirs 12, 14.

Landscapes

  • Combined Means For Separation Of Solids (AREA)

Abstract

L'invention concerne un procédé et un appareil destinés à optimiser l'utilisation de la capacité de traitement d'une usine de traitement de matériau conçue pour traiter le minerai exploité, comprenant un premier courant de traitement (5) qui alimente une première unité de traitement (7) destinée à traiter une fraction granulométrique fine du matériau à traiter et un second courant de traitement (6) qui alimente une seconde unité de traitement (8) destinée à traiter une fraction granulométrique plus grossière avec une efficacité optimale. Le procédé consiste à trier (1) le matériau à traiter en une fraction granulométrique fine, une fraction granulométrique grossière et une fraction granulométrique moyenne qui présente une fraction granulométrique comprise entre celles des fractions granulométriques fine et grossière. Les fractions granulométriques fine et grossière sont respectivement dirigées vers les premier et second courants de traitement, et la fraction granulométrique moyenne est dirigée vers les premier et second courants de traitement à chaque fois que les unités de traitement associées à ces derniers présentent un surcroît de capacité de traitement, afin d'optimiser l'utilisation de la capacité de traitement des unités de traitement.
PCT/IB2007/054872 2006-11-30 2007-11-30 Procédé et appareil destinés à optimiser l'utilisation de la capacité de traitement d'une usine de traitement de matériau WO2008065632A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200610047 2006-11-30
ZA2006/10047 2006-11-30

Publications (1)

Publication Number Publication Date
WO2008065632A1 true WO2008065632A1 (fr) 2008-06-05

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Country Status (2)

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WO (1) WO2008065632A1 (fr)
ZA (1) ZA200804685B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010042994A1 (fr) * 2008-10-16 2010-04-22 Technological Resources Pty. Limited Procédé de tri d'un matériau extrait, devant être extrait ou stocké pour obtenir un matériau affiné avec une rentabilité améliorée
WO2012034179A1 (fr) * 2010-09-17 2012-03-22 Technological Resources Pty. Limited Exploitation minière réalisant le tri à sec de matériaux extraits ou stockés, la production d'un matériau amélioré et un mélange supplémentaire éventuel pour produire un produit conforme aux spécifications du client
WO2012034180A1 (fr) * 2010-09-17 2012-03-22 Technological Resources Pty. Limited Mélange de matériaux extraits d'une mine
CN103827445A (zh) * 2011-07-08 2014-05-28 技术信息有限公司 开采作业中的分选
CN110898957A (zh) * 2019-11-13 2020-03-24 鞍钢集团矿业有限公司 一种极贫赤铁矿的分粒级预选抛尾工艺

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197194A (en) * 1978-10-02 1980-04-08 Read James L Loam screening apparatus
GB2040190A (en) * 1979-01-19 1980-08-28 Buehler Ag Geb Process and apparatus for the dry cleaning of grain
US4231861A (en) * 1979-03-26 1980-11-04 Parsons Manufacturing, Incorporated Grain cleaning apparatus
US4384952A (en) * 1980-09-24 1983-05-24 Parsons Manufacturing, Incorporated Grain cleaning apparatus
DE3709179C1 (de) * 1987-03-20 1988-03-10 Sorg Gmbh & Co Kg Verfahren und Vorrichtung zur Wiedergewinnung von Glas aus Altglas

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4197194A (en) * 1978-10-02 1980-04-08 Read James L Loam screening apparatus
GB2040190A (en) * 1979-01-19 1980-08-28 Buehler Ag Geb Process and apparatus for the dry cleaning of grain
US4231861A (en) * 1979-03-26 1980-11-04 Parsons Manufacturing, Incorporated Grain cleaning apparatus
US4384952A (en) * 1980-09-24 1983-05-24 Parsons Manufacturing, Incorporated Grain cleaning apparatus
DE3709179C1 (de) * 1987-03-20 1988-03-10 Sorg Gmbh & Co Kg Verfahren und Vorrichtung zur Wiedergewinnung von Glas aus Altglas

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010042994A1 (fr) * 2008-10-16 2010-04-22 Technological Resources Pty. Limited Procédé de tri d'un matériau extrait, devant être extrait ou stocké pour obtenir un matériau affiné avec une rentabilité améliorée
US8931720B2 (en) 2008-10-16 2015-01-13 Technological Resources Pty. Limited Method of sorting mined, to be mined or stockpiled material to achieve an upgraded material with improved economic value
AU2009304592B2 (en) * 2008-10-16 2015-10-08 Technological Resources Pty. Limited A method of sorting mined, to be mined or stockpiled material to achieve an upgraded material with improved economic value
WO2012034179A1 (fr) * 2010-09-17 2012-03-22 Technological Resources Pty. Limited Exploitation minière réalisant le tri à sec de matériaux extraits ou stockés, la production d'un matériau amélioré et un mélange supplémentaire éventuel pour produire un produit conforme aux spécifications du client
WO2012034180A1 (fr) * 2010-09-17 2012-03-22 Technological Resources Pty. Limited Mélange de matériaux extraits d'une mine
AU2011301780B2 (en) * 2010-09-17 2016-05-12 Technological Resources Pty. Limited Blending mined material
AU2011301779B2 (en) * 2010-09-17 2016-05-19 Technological Resources Pty. Limited A mining operation involving dry sorting a mined or stockpiled material, producing an upgraded material and possible further blending to produce a product of required customer specification
CN103827445A (zh) * 2011-07-08 2014-05-28 技术信息有限公司 开采作业中的分选
CN110898957A (zh) * 2019-11-13 2020-03-24 鞍钢集团矿业有限公司 一种极贫赤铁矿的分粒级预选抛尾工艺

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