WO2020037440A1 - Dispositifs élévateurs destinés à être utilisés dans des appareils de broyage dans des opérations industrielles et minières - Google Patents

Dispositifs élévateurs destinés à être utilisés dans des appareils de broyage dans des opérations industrielles et minières Download PDF

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Publication number
WO2020037440A1
WO2020037440A1 PCT/CL2019/000028 CL2019000028W WO2020037440A1 WO 2020037440 A1 WO2020037440 A1 WO 2020037440A1 CL 2019000028 W CL2019000028 W CL 2019000028W WO 2020037440 A1 WO2020037440 A1 WO 2020037440A1
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WO
WIPO (PCT)
Prior art keywords
lifter
steel
main body
main
lifters
Prior art date
Application number
PCT/CL2019/000028
Other languages
English (en)
Spanish (es)
Inventor
Edison Adrián COLLINAO ROBLES
Eric Edgardo JORQUERA GALLARDO
Sebastián Andrés SILVA GARCÍA
Original Assignee
Compañia Electro Metalúrgica S.A.
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 Compañia Electro Metalúrgica S.A. filed Critical Compañia Electro Metalúrgica S.A.
Publication of WO2020037440A1 publication Critical patent/WO2020037440A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B02C17/18—Details
    • B02C17/22—Lining for containers

Definitions

  • the present invention relates to equipment with induction in industrial and mining operations.
  • the present invention relates to equipment coatings (known in the technical area as lifters and referred to hereinafter simply as lifters) which, in addition to protecting their structure, are used as load lifters during the production process and whose technical advantages They allow, among other things, to reduce both the total weight and the number of parts that make up the set of coatings of said equipment, also achieving a significant decrease in maintenance times thanks to the optimization of assembly and disassembly times, maintaining and / or improving the shelf life of the product.
  • equipment coatings known in the technical area as lifters and referred to hereinafter simply as lifters
  • Comminution equipment such as autogenous or semi-autogenous mills, balls and bars, decreases the size of the material that enters them through the impact and / or abrasion that is generated thanks to its constant rotation. These teams rotate around its axis, generating, in this way, the permanent rubbing and impact between the different components of its load (mainly mineral and steel balls).
  • these equipments are provided with an inner lining that, in addition to protecting their structure, is responsible for optimizing the drag, impact and movement of the load in process, thereby efficiently reducing its size.
  • part of the inner lining of these comminution equipment corresponds to lifters. Its function during the operation of the mill is to raise the material through its internal walls to the point where gravity manages to separate it from the wall and, as in the case of semi-autogenous mills, propel this material in a parabolic fall in the direction of the lower part of the mill where the rest of the load that is being processed is located, producing, in this way, the necessary impact for the reduction of the size of the treated material.
  • the set of coatings constitutes an important part of the weight that the mill rests bear, this being one of the reasons that limit the material processing capacity.
  • the greater the weight the more energy consumption is generated during the operation and, to the extent that said set of Coatings are made up of a larger number of pieces, increasing the time required for each maintenance that considers its renewal.
  • Wear plates are described as part of the lining of a mill, which comprise an elastomer body, where various grooves and holes are arranged of material discharge.
  • an elastomeric block is particularly disclosed which is cast by casting on a support plate and contains a series of discharge holes.
  • the technical problem that solves the invention described in said document is related to minimizing the repeated obstruction of the discharge holes of the equipment.
  • US Patent 9,475,057 (Cabot Corporation) addresses the problem of minimizing the frequency at which mill liners must be replaced, for which lifters are proposed which include an upper elastomeric layer and a lower elastomeric layer. , of different composition each.
  • An objective of the present invention is to provide steel lifters for comminution equipment such as semi-autogenous, ball mills or the like, lighter than those currently used.
  • Figure 1 shows a coating mantle section for comminution equipment with prior art lifters, typically employed in the industry.
  • Figure 2 is a cross-sectional view of a prior art lifter.
  • Figure 3 shows a set of lifters according to an embodiment of the present invention, as they would be arranged in a comminution equipment. The expert will understand that this assembly forms a portion of the liner of lifters that are arranged in a comminution equipment.
  • Figure 4 is a top perspective view of a lifter according to an embodiment of the present invention.
  • Figure 5 is a bottom perspective view of a lifter according to an embodiment of the present invention, where the portion of steel with cavities in its lower face is shown.
  • Figure 6 is a bottom perspective view of a lifter according to another embodiment of the present invention, where the rubber-coated steel portion is appreciated.
  • Figure 7a illustrates the cross section of lifters in accordance with an exemplary embodiment of the present invention.
  • Figure 7b illustrates the cross section of a lifter according to another exemplary embodiment of the present invention.
  • Figure 7c illustrates the cross section of lifters in accordance with yet another exemplary embodiment of the present invention.
  • Figure 8a shows results of wear profiles in a cross-section of a lifter according to an exemplary embodiment of the present invention, described in Example 1; where the black lines show the nominal profile, and the red lines show the wear profile.
  • Figure 8b shows results of wear profiles in a cross-section of a prior art lifter, according to what is discussed in Example 1; where the black lines show the nominal profile, and the red lines show the wear profile.
  • comminution equipment such as Semiautogen (SAG) mills, autogenous, ball mills, or others, employ different types of coatings to fulfill the task of reducing the load size processed.
  • Lifters are among the types of siding typically used in these comminution equipment. These lifters are usually made of steel, rubber or hybrids. Its main function is to allow the material to be processed to be lifted during the operation of the comminution equipment so that, once above, due to gravity, they are separated from the wall of the mill and fall towards the lower section of the mill. In this way, through the impact and abrasion generated, allow the comminution of the material, that is, the decrease in its size.
  • lifters (1) are provided for use in comminution equipment, whose main body (2) is cast steel, preferably chrome-molybdenum alloy, white iron, or other.
  • these pieces have reinforcements (3) of rubber or other polymer, which can cover at least a portion of the steel body, such as side walls and / or base.
  • the steel part or body (2) has, on its upper face (21), at least one shoulder or protuberance (212), while on its lower face (22) it has at least one cavity (223), as can be seen, for example, in Figure 5.
  • This at least one cavity (223) covers between about 1% and about 30% of the total volume of the lifter. In preferred embodiments, the at least one cavity may range between about 3% and about 20% or between about 5% and about 15% of the total volume of the lifter. It should be understood that other combinations of percentages are possible within the ranges already described, and that multiple cavities may exist as long as the range of defined percentages is maintained.
  • this at least one cavity (223) makes it possible to reduce the total volume and weight of the steel piece, without damaging its mechanical strength, thus achieving, at least, the same lifespan and the same functionality of the lifters of prior art. This is not trivial, precisely because the at least one cavity decreases the volume of the lifter and, therefore, the expert would expect a noticeable decrease in the mechanical strength of the piece. Moreover, depending on the location of the at least one cavity (223) on the lower face of the main steel body, with respect to the at least one protuberance (212), it would be expected that the constant impact of the material with the lifter, damage its structure in advance, affecting its useful life.
  • the present invention allows at least maintaining the lifespan of the lifters, and at least maintaining their function, when compared with lifters employed in the art, with the consequent benefits that this implies and that have been described in an exemplary way, in the synthesis of the invention.
  • the at least one cavity (223) of the steel part can be of any geometry, such as a square, rectangular, rounded, circular or ovoid base; or of square, rectangular, rounded, concave, ovoid, sinusoidal section, or a combination of them.
  • the expert will understand that other forms are possible, without departing from the scope of what is described here.
  • the at least one protuberance (212) of the main body (2) of steel it can be convex in at least a portion of the body (2) or flat in at least a portion of the body (2).
  • the at least one protuberance (212) is convex in at least a longitudinal portion of the main body (2).
  • the at least one protuberance (212) of the main steel body is convex along the entire longitudinal axis of the main steel body (2).
  • the basal ends of the at least one convex protuberance may be straight or curved, forming in some embodiments concave portions on the upper face of the main body, or a cross section of a general sinusoidal shape. Other combinations of the geometries described in this paragraph are also possible, without departing from the scope of the invention.
  • the reinforcement (3) of rubber or other polymer this may be of any type of rubber or polymer, but preferably it is an abrasion resistant rubber. In a preferred embodiment, it is arranged in the lateral areas and / or at the base of the lifter (1).
  • the rubber coating (3) can cover at least one side face of the steel part, such as a pair of side faces; and in still another preferred embodiment, it can cover the base of the steel part, including, for example, the area where the emptying is located.
  • the final form of the lifters of the present invention can vary significantly, depending on their position in the comminution equipment, or the typical industry requirements for the optimization of the comminution equipment production, because the Advantages of the invention result, among others, from the particular combination of elements that allow, on the one hand, to reduce the weight of the piece and, on the other, at least maintain the performance of the lifters with respect to lifters of the prior art.
  • lifters of the present invention were installed as part of the interior lining of a 40 x 26-foot SAG mill (12.19 m by 7.92 m).
  • the lifter used was of the type of piece formed by molybdenum chrome alloy cast steel, where the steel structure had on its underside a series of 3 cavities that, together, covered 15% of the total volume of the lifter.
  • the steel part had side and bottom coatings of hot vulcanized rubber, 30 mm and 6 mm thick, respectively.

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Crushing And Grinding (AREA)
  • Crushing And Pulverization Processes (AREA)

Abstract

La présente invention concerne des appareils de broyage utilisés dans des opérations industrielles et minières, particulièrement avec des dispositifs élévateurs, dont la combinaison de configuration et/ou de matériaux permet, ensemble, de réduire le temps d'arrêt pour la maintenance de l'appareil en raison d'un montage et d'un démontage plus facile de ces produits dans le broyeur et de la diminution de la quantité totale de disposifs élévateurs employés dans l'ensemble de revêtements; ce qui maintient ainsi la faisabilité du recyclage des pièces classiques.
PCT/CL2019/000028 2018-08-21 2019-08-20 Dispositifs élévateurs destinés à être utilisés dans des appareils de broyage dans des opérations industrielles et minières WO2020037440A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CL2018002389A CL2018002389A1 (es) 2018-08-21 2018-08-21 Levantadores para uso en equipos de conminución en faenas industriales y mineras
CL2389-2018 2018-08-21

Publications (1)

Publication Number Publication Date
WO2020037440A1 true WO2020037440A1 (fr) 2020-02-27

Family

ID=65588807

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CL2019/000028 WO2020037440A1 (fr) 2018-08-21 2019-08-20 Dispositifs élévateurs destinés à être utilisés dans des appareils de broyage dans des opérations industrielles et minières

Country Status (2)

Country Link
CL (1) CL2018002389A1 (fr)
WO (1) WO2020037440A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5185980A (en) * 1990-03-13 1993-02-16 Trellex Aktiebolag Wall exposed to wear and means for making it
US6206310B1 (en) * 1997-07-17 2001-03-27 Magotteaux International Rotary mill
US20070284464A1 (en) * 2006-06-07 2007-12-13 Nordell Lawrence K Rock grinding mill and method
WO2011150531A1 (fr) * 2010-04-13 2011-12-08 Metso Minerals Chile S.A. Dispositif de levage pour moulins semi-autogènes (sag)en acier et caoutchouc
US20160310952A1 (en) * 2015-04-22 2016-10-27 Lawrence K. Nordell Rock Mill Lifter

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5185980A (en) * 1990-03-13 1993-02-16 Trellex Aktiebolag Wall exposed to wear and means for making it
US6206310B1 (en) * 1997-07-17 2001-03-27 Magotteaux International Rotary mill
US20070284464A1 (en) * 2006-06-07 2007-12-13 Nordell Lawrence K Rock grinding mill and method
WO2011150531A1 (fr) * 2010-04-13 2011-12-08 Metso Minerals Chile S.A. Dispositif de levage pour moulins semi-autogènes (sag)en acier et caoutchouc
US20160310952A1 (en) * 2015-04-22 2016-10-27 Lawrence K. Nordell Rock Mill Lifter

Also Published As

Publication number Publication date
CL2018002389A1 (es) 2019-02-08

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