AU2006340291A1

AU2006340291A1 - Lining members and a lining arrangement including such lining members

Info

Publication number: AU2006340291A1
Application number: AU2006340291A
Authority: AU
Inventors: Berend Jan Werkman
Original assignee: WERKMAN BEREND
Current assignee: WERKMAN BEREND
Priority date: 2006-03-15
Filing date: 2006-10-30
Publication date: 2007-09-20
Also published as: WO2007105038A3; WO2007105038A2; AU2006340292A1; ZA200610210B; WO2007105039A2; ZA200610209B; WO2007105039A3

Description

WO 2007/105038 PCT/IB2006/054006 1 LINING MEMBERS AND A LINING ARRANGEMENT INCLUDING SUCH LINING MEMBERS FIELD OF THE INVENTION 5 The invention relates to lining members and a lining arrangement for a surface to be lined utilizing such lining members. More particularly, but not exclusively, the invention relates to lining members for lining receptacles and/or surfaces for use in storing and/or conveying abrasive material, such as mineral ore, and to a lining arrangement utilizing 10 such lining members, such as skips, chutes and dump trucks. BACKGROUND TO THE INVENTION Many applications exist where abrasive material needs to be conveyed and stored. In 15 mining applications ore is frequently conveyed as part of the mining process. The conveyed ore often consists of a wide range of rock fragments that vary in size from a fraction of a millimeter to rocks of up to 500mm in diameter. In applications where the ore has not been screened the ore may include even larger rocks. The rock fragments often have sharp edges, and may also be of irregular shapes having sharp protrusions. 20 It will be appreciated that the ore described above causes excessive wear when impacting on or sliding along a conveyance surface. The wear is particularly severe in the case of mine skips, ore chutes and dump trucks, as ore is typically dropped into such receptacles from elevated positions, thus increasing 25 the impact of the ore on the load-bearing surfaces.

WO 2007/105038 PCT/IB2006/054006 2 In practice, sacrificial liners are often used to protect the surface of a receptacle in or along which the ore is to be conveyed. The liners typically comprise a plurality of individual liner elements, which can be independently secured to a surface in side-by side configuration so as to form a substantially continuous liner, but without having to 5 replace the entire liner should there be localized wear at some of the individual liner elements. It is also advisable that the liner elements be constructed of suitably small size to enable the liner elements to be manhandled. The replaceable liners are generally fixed to the inside of the receptacle, with elongate 10 gaps being present between the edges of adjacent liners. An undesirable consequence that shorten the useful life of the receptacles associated with this practice is that accelerated erosion occurs along and between the liner edges due to the flow of abrasive material along such edges and inside the gap formed between the adjacent edges. As the gap widens due to abrasion, wear damage is also caused to the 15 receptacle wall that is supposed to be protected by the liner, as such further exacerbating the abrasion effect on the system as a whole. In applications where the ore is wet, such as ore transported by mine skips, there is the further additional problem of corrosion between the liners and the wall of the receptacle. 20 This is predominantly due to crevice corrosion in the crevice formed between the steel liners and the walls of the receptacle, and in particular the body of the skip. Such corrosion is particularly severe if the water associated with the ore is corrosive, as is generally the case with mine water. Paint protection between the liners and skip body is ineffective, as it does not remain intact under impact loads. The crevice corrosion 25 results in excessive pitting behind the liners, and therefore reduces the life of the skip body, or the surface of any other relevant receptacle, considerably. This problem is WO 2007/105038 PCT/IB2006/054006 3 experienced at any metal-to-metal interface found in this particular corrosive environment. 5 OBJECT OF THE INVENTION It is accordingly an object of the invention to provide a lining member, and a lining arrangement utilizing a plurality of such lining members, that will at least partially alleviate the abovementioned disadvantages. 10 It is also an object of the invention to provide a lining member, and a lining arrangement utilizing a plurality of such lining members, that will provide a useful alternative to existing lining members and lining arrangements. 15 SUMMARY OF THE INVENTION According to the invention there is provided a lining member, suitable for use in lining a surface to be shielded against abrasive material, the lining member including 20 a substantially planar body; and a raised lip section extending from at least one end zone of the planar body; the raised lip section being adapted to, in use, overlie at least part of a planar body of an adjacent lining member when the lining members are positioned on the surface shielded against abrasive material. 25 WO 2007/105038 PCT/IB2006/054006 4 The raised lip section may include an oblique section that terminates in an overlying section that is substantially parallel to the planar body of the lining member. There is provided for raised lip sections to extend from at least two end zones of the 5 planar body. In one embodiment there is provided for the raised lip sections to extend from two adjacent, substantially perpendicular end zones of the planar body. In this embodiment the lip section may only extend partially the length of the end zones. 10 In a further embodiment there is provided for the raised lip sections to extend from opposing end zones of the planar body. Preferably the planar body is substantially rectangular or square when viewed in plan. 15 There is also provided for the lining member to include engagement formations to enable the lining member to engage complementary engagement formations provided on adjacently positioned lining members. 20 The engagement formations may be in the form of at least one protrusion extending from the lining member, the protrusion being configured and dimensioned for engaging a complementary receiving aperture provided in an adjacently positioned lining member. The protrusion may be provided in the planar section of the lining member, and the receiving aperture may be provided in the raised lip section extending from the lining 25 member.

WO 2007/105038 PCT/IB2006/054006 5 The engagement formations may also include at least one receiving aperture provided in the lining member, the receiving aperture being configured and dimensioned for receiving a complementary protrusion extending from an adjacently positioned lining member. 5 The lining member may also include a securing formation for use in securing the lining member to the shielded surface. The securing formation may be in the form of at least one aperture for receiving a threaded securing member therethrough. 10 Preferably the lining member is made of metal. According to a further aspect there is provided a lining arrangement, suitable for lining a surface to be shielded against abrasive material, the lining arrangement including a plurality of lining members as described above, the lining members being secured to the 15 shielded surface in side-by-side configuration in order for adjacent lining members to at least partially overlie one another. According to a further aspect of the invention there is provided a lining arrangement, suitable for lining a surface to be shielded against abrasive material, the lining 20 arrangement including: at least one substantially planar lining member being securable to the surface to be lined; and an at least partially resilient backing member being locatable between the lining member and the surface to be lined; 25 the resilient backing member being sandwiched between the lining member and the shielded surface when the lining member is secured to the surface.

WO 2007/105038 PCT/IB2006/054006 6 Preferably the backing member is made of elastomeric material. There is provided for the lining member to be in the form of a lining member as 5 described hereinbefore. Preferably the lining arrangement includes a plurality of lining members located adjacent one another so as to form a substantially continuous liner. 10 Preferably the lining arrangement includes a plurality of backing members located adjacent one another so as to form a substantially continuous backing sheet. The lining member may be bolted to the shielded surface, in so doing trapping the backing member between the lining member and the shielded surface. 15 An adhesive layer may also be provided between the backing member and the shielded surface, and/or between the backing member and the lining member. The lining member may be connected to the shielded surface by way of securing bolts 20 extending though securing apertures provided in the lining member. The apertures for receiving the securing bolts preferably have a larger diameter than shanks of the securing bolts, so as to allow movement between the lining members and the securing bolts, and as such between the lining member and the shielded surface. 25 The securing bolts may be secured to the shielded surface by way of lock nuts.

WO 2007/105038 PCT/IB2006/054006 7 BRIEF DESCRIPTION OF THE DRAWINGS 5 Preferred embodiments of the invention are described by way of non-limiting examples, and with reference to the accompanying drawings, in which: Figure 1 is a plan view of a prior art lining arrangement; 10 Figure 2 is a cross-sectional side view of the lining arrangement of figure 1; Figure 3 is a plan view of a lining arrangement in accordance with the invention; Figure 4 is a cross-sectional side view of the lining arrangement of figure 3; 15 Figure 5 is a plan view of a further lining arrangement in accordance with the invention; Figure 6 is a cross-sectional side view of the lining arrangement of figure 5; 20 Figure 7 is a cross-sectional side view of a further lining arrangement in accordance with the invention, in particular showing a corner section of a lined receptacle; 25 Figure 8 is a cross-sectional side view of a further embodiment of the corner section of figure 7; WO 2007/105038 PCT/IB2006/054006 8 Figure 9 is a plan view of a further embodiment of the lining arrangement in accordance with the invention; 5 Figure 10 is a cross-sectional side view of the lining arrangement of figure 9; Figure 11 is a plan view of a single lining member used in the lining arrangement of figure 9; and 10 Figure 12 is a cross-sectional view of a further embodiment of the lining arrangement in accordance with the invention. DETAIL DESCRIPTION OF THE INVENTION 15 Referring to the drawings, in which like numerals indicate like features, non-limiting examples of a lining arrangement in accordance with the invention is indicated by reference numeral 10. 20 A lining arrangement 15 known in the prior art is shown in figures 1 and 2. Lining members 15.1 in the form of hard, wear resistant plates are secured to a surface 15.2 to be shielded against abrasive material by way of countersunk bolts 15.5. Longitudinal 15.3 and transversal 15.4 gaps are left between adjacently secured lining members, and the idea is that fine particles of the abrasive material will fill up these gaps so as to form 25 a protective layer that will prevent wear of the shielded surface 15.2. However, in practice the inventor has found that such protection indeed occurs at the transversal WO 2007/105038 PCT/IB2006/054006 9 gaps 15.4 (being substantially perpendicular relative to the direction of particle flow indicated by arrow A), but that excessive wear occurs in the longitudinal gaps 15.3 where the elongate gaps are aligned with the direction of particle flow indicated by arrow A. The degree and rate of wear is exacerbated as the longitudinal gaps 15.3 widen due 5 to wear. Figures 3 and 4 show one embodiment of a new liner arrangement 10 in accordance with the invention. In this embodiment a plurality of lining members 30 cover a shielded surface 20 (which would otherwise be exposed to abrasive material). Each lining 10 member 30 comprises a planar body 31 in the form of a sheet of hard material, for example steel. Each lining member 30 also includes a raised lip section 33 that extends from an end zone 32 of the lining member 30. The raised lip section 33, as can best be seen in figure 4, includes an oblique section 33.1 as well as an overlying section 33.2, which is substantially parallel to the planar body 31 of the lining member 30. Securing 15 apertures 34 are provided for securing the lining member 30 to the shielded surface 20, and are suitable for receiving securing means such as threaded bolts, and in particular countersunk bolts. When the lining members 30 are positioned side-by-side the raised lip section 33, and in particular the overlying section 33.2 extending from one lining member 30 will overlie part of the planar body 31 of an adjacent lining member so as to 20 seal the longitudinal gaps 15.3 previously present in the prior art configuration shown in figures 1 and 2. It will be appreciated that in the above embodiment, as well as those described hereinbelow, the shielded surface 20 may be an outer surface of a number of different 25 metal sheets, including the body of a mining skip, the load carrying surface of a dump truck and the surface of a conveyance chute.

WO 2007/105038 PCT/IB2006/054006 10 The securing apertures 34 of adjacent lining members 30 is also aligned, thus enabling two adjacent lining members 30 to be secured to the shielded surface 20, and thus also to one another, by way of a threaded bolt. This arrangement results in the lining 5 members 30 forming a substantially continuous and rigid reinforcing ring that, in addition to wear protection, also contributes to the structural strength of the shielding surface 20 to which it is secured. It is foreseen that this characteristic may result in a reduction of the thickness of the sheet having the shielded surface 20. 10 A further embodiment of the improved lining arrangement 10 in accordance with the invention is shown in figures 5 and 6. The lining members 30 of this embodiment do not include the raised lip sections 33, and longitudinal gaps 15.3 are still present. However, in this embodiment additional backing members 50 in the form of resilient backing sheets are provided between the shielded surface 20 and the lining members 30. The backing 15 members 50 are typically made from elastomeric material such as a suitable type of rubber. Both the lining members 30 and the backing members 50 are secured to the shielded surface 20 by way of countersunk bolts 38.1 that engage self-locking nuts 38.2. The aperture 34 in the lining member 30 is slightly larger than the shank of the countersunk bolt 38.1 so as to allow movement of the lining member 30 relative to the 20 stationary bolt shank when abrasive material exerts a force on the lining member 30 to compress the backing member 50. The self-locking nuts 38.2 prevent the bolts 38.1 form becoming loose when the tension is reduced upon compression of the resilient backing members 50. The resilient backing members 50 may be made slightly larger than the lining members 30 so that when installed the backing members 50 leave no 25 gaps below the edges of the lining members 30. The longitudinal 15.3 and transversal WO 2007/105038 PCT/IB2006/054006 11 15.4 gaps between the lining members 30 will therefore not extend up to the shielded surface 20. The inventor has found that with this arrangement, whereby the resilient backing 5 members 50 are allowed to be compressed as loads from the abrasive materials are exerted on the lining members 30, the operational life of the lining members 30 are extended compared to the operational life of the lining members 30 should the lining members be secured to the shielded surface 20 directly. At the same time the occurrence of corrosion between the lining member 30 and the shielded surface 20 is 10 practically eliminated in case of wet and abrasive material, as the backing member 50 effectively forms a seal against unwanted moisture ingress. It is also foreseen that a suitable adhesive may be applied between the backing member 50 and the shielded surface 20 and/or between the backing member 50 and the lining member 30. The inventor believes that this would further prevent the occurrence of crevice corrosion. 15 It will be appreciated that the resilient backing members 50 may likewise be utilized in the lining arrangement as shown in figures 3 and 4. Figures 7 and 8 shows two corner sections of receptacles utilizing the same conceptual 20 approach as described above. In the embodiment shown in figure 7 the two corner lining members 30 include the raised lips sections 33 as described hereinbefore, but in addition includes opposing corner lip sections 39 that in use overlie a corner section 35. In figure 8 a backing member 50 is also included between the lining members 30 and the shielded surfaces 20. 25 WO 2007/105038 PCT/IB2006/054006 12 In an alternative embodiment, not shown in the drawings, the corner section 35 may be located closer to the shielded surface 20 than the lining members 30, due to a backing member 50 of reduced thickness being used behind the corner section 35. In this embodiment it will not be necessary for the lining members 30 to include corner lip 5 sections 39, as ends of the lining members 30 will merely overlie the receded corner sections 35. It will be appreciated that this will simplify the design of the corner arrangements. A further embodiment of the lining arrangement 10 is shown in figures 9 and 10. Again, 10 the lining members 30 described in this embodiment can be used with or without backing members 50. In this embodiment the lining members 30 include the first raised lip sections 33 as described in the embodiment of figures 3 and 4, but also includes second raised lips sections 36 that extend from the lining members 30 from end zones adjacent and perpendicular to the first raised lip sections 33. Also, neither the first raised lip 15 sections 33 nor the second raised lip sections 36 extend along the entire length of the lining members 30 so as to enable the lip sections extending from adjacent lining members 30 to, in use, abut as is shown in figure 9, in so doing closing both the longitudinal and the transversal gaps. In these embodiments the lining members 30 are each only secured to the shielding surface by two bolts 38.1. Additional engagement 20 means in the form of protrusions 37.1 and complementary receiving apertures 37.2 are however provided to enable adjacent lining members 30 to be secured relative to one another. A plan view of a single lining member 30 is shown in figure 11. The protrusions 37.1 typically extend from the planar sections 31, whereas the receiving apertures 37.2 are located in the raised lip sections 33 and 36. 25 WO 2007/105038 PCT/IB2006/054006 13 Receptacles such as skips and other containers often have localized areas that are exposed to substantial impact loads when the abrasive material is loaded into the receptacle. It is know in the prior art to provide thick, planar resilient pads to absorb the energy, particularly if the abrasive material includes rocks. Such resilient pads usually 5 comprise resilient sheets mounted on metal backing plates, which allows such assemblies to be secured to shielded surface of the receptacle. The inventor has found that the resilient sheets have a short operational lifespan due to the sheets being cut and damaged by sharp edges of rock impacting against such sheets. Also, as is the case with the traditional linings as described above, corrosion occurs between the backing 10 plates and the shielded surface. The inventor has thus found that the same principles of the present invention can also be applied to the particular high-impact applications. An embodiment of the invention that would facilitate the same is shown in figure 12. The lining arrangement of this embodiment includes lining members 60 as well as resilient backing members 50. The lining members 60 include inclined sections 61 and planar 15 sections 62. The lining members 60 includes securing sections 65, where countersunk bolts 66 are fitted through the lining member and through a section of the backing member 50 that is relatively thin, but of sufficient thickness to allow the lining member 60 to pivot along the bolts 66, whilst at the same time anchoring the lining member 60 for when abrasive material impact against the lining member 60. In addition, ends 51 of the 20 backing members may be shaped to be complementary with the inclined sections 61 and the securing sections 65 of adjacent lining members 60 so as to allow the inclined lining members 60 to be located end to end to form a substantially continuous lining having individually displaceable sub-sections. 25 The lining members 30 in accordance with the prior art are generally made from metal, and steel plates with a Brinell hardness number of 600 is often used. The inventor has WO 2007/105038 PCT/IB2006/054006 14 found that improved wear resistance can be obtained if welding filler material, having a Brinell hardness number of about 600, and which also includes Chrome carbides, is applied on the surface of a steel plate that may have a Brinell hardness number of less than 600. The inventor has found that this liner construction even further increases the 5 life of a liner member. It will be appreciated that the above are only some embodiments of the invention, and that there may be many variations without departing from the spirit and/or the scope if the invention. 10

Claims

1. A lining member, suitable for use in lining a surface to be shielded against abrasive material, the lining member including: 5 a substantially planar body; and a raised lip section extending from at least one end zone of the planar body; the raised lip section being adapted to overlie at least part of a planar body of an adjacent lining member when the lining members are positioned on the surface shielded against abrasive material. 10

2. The lining member of claim 1 wherein the raised lip section includes an oblique section that terminates in an overlying section being substantially parallel to the planar body of the liner member. 15

3. The lining member of claim 1 or claim 2 wherein raised lip sections extend from at least two end zones of the planar body.

4. The lining member of claim 3 wherein the raised lip sections extend from two adjacent, substantially perpendicular end zones of the planar body. 20

5. The lining member of claim 4 wherein the raised lip sections only extend partially the length of the end zones.

6. The lining member of claim 3 wherein the raised lip sections extend from 25 opposing end zones of the planar body. WO 2007/105038 PCT/IB2006/054006 16

7. The lining member of any one of the preceding claims wherein the planar body is substantially rectangular or square when viewed in plan.

8. The lining member of any one of the preceding claims including engagement 5 formations to enable the lining member to engage complementary engagement formations provided on adjacently positioned lining members.

9. The lining member of claim 8 wherein the engagement formations include at least one protrusion extending from the liner member, the protrusion being configured 10 and dimensioned for engaging a complementary receiving aperture provided in an adjacently positioned lining member.

10. The lining member of claim 8 wherein the engagement formations include at least one receiving aperture provided in the lining member, the receiving aperture 15 being configured and dimensioned for receiving a complementary protrusion extending from an adjacently positioned lining member.

11. The lining member of claim 9 or claim 10 wherein the protrusion extends from the planar section of the lining member, and the receiving aperture is located in the 20 raised lip section extending from the lining member.

12. The lining member of any one of the preceding claims including a securing formation for use in securing the lining member to the shielded surface. 25

13. The lining member of claim 12 wherein the securing formation is in the form of at least one aperture for receiving a threaded securing member therethrough. WO 2007/105038 PCT/IB2006/054006 17

14. The lining member of any one of the preceding claims wherein the lining member is made of metal. 5

15. The lining member of claim 14 wherein the lining member comprises a steel plate onto which a layer of welding material is welded.

16. The lining member of claim 15 wherein the welding material has a Brinell hardness number of between 550 and 600, and wherein the welding material 10 includes at least some Chrome carbide.

17. A lining arrangement, suitable for lining a surface to be shielded against abrasive material, the lining arrangement including a plurality of lining members as claimed in any one of claims 1 to 16, the lining members being secured to the 15 shielded surface in side-by-side configuration in order for adjacent lining members to at least partially overlie one another.

18. A lining arrangement, suitable for lining a surface to be shielded against abrasive material, the lining arrangement including: 20 at least one substantially planar lining member being securable to the surface to be lined; and an at least partially resilient backing member being locatable between the lining member and the surface to be lined; the resilient backing member being sandwiched between the lining member and 25 the shielded surface when the lining member is secured to the surface. WO 2007/105038 PCT/IB2006/054006 18

19. The lining arrangement of claim 18 wherein the backing member is made of elastomeric material.

20. The lining arrangement of claim 18 or 19 wherein the lining member is in the form 5 of a lining member as claimed in any on of claims 1 to 16.

21. The lining arrangement of any one of claims 18 to 20 including a plurality of lining members located adjacent one another so as to form a substantially continuous liner. 10

22. The lining arrangement of any one of claims 18 to 21 including a plurality of backing members located adjacent one another so as to form a substantially continuous backing sheet. 15

23. The lining arrangement of any one of claims 18 to 22 wherein the lining member is bolted to the shielded surface, in so doing trapping the backing member between the lining member and the shielded surface.

24. The lining arrangement of any one of claims 18 to 23 wherein an adhesive layer 20 is provided between the backing member and the shielded surface.

25. The lining arrangement of any one of claims 18 to 23 wherein an adhesive layer is provided between the backing member and the lining member. WO 2007/105038 PCT/IB2006/054006 19

26. The lining arrangement of any one of claims 18 to 25 including a securing aperture for securing the lining member to the shielded surface by way of at least one securing bolt. 5

27. The lining arrangement of claim 26 wherein the receiving aperture has a larger diameter than a shank of the securing bolt, so as to allow movement between the lining members and the securing bolt and between the lining members and the shielded surface. 10

28. The lining arrangement of any one of claims 26 to 27 wherein the securing bolt is secured to the shielded surface by way of a lock nut.