AU4584599A - Ore screening panel system - Google Patents
Ore screening panel system Download PDFInfo
- Publication number
- AU4584599A AU4584599A AU45845/99A AU4584599A AU4584599A AU 4584599 A AU4584599 A AU 4584599A AU 45845/99 A AU45845/99 A AU 45845/99A AU 4584599 A AU4584599 A AU 4584599A AU 4584599 A AU4584599 A AU 4584599A
- Authority
- AU
- Australia
- Prior art keywords
- screening
- ribs
- panel
- protection
- ore
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000012216 screening Methods 0.000 title claims description 65
- 239000000463 material Substances 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 239000002245 particle Substances 0.000 description 6
- 238000005065 mining Methods 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229920001875 Ebonite Polymers 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 238000010058 rubber compounding Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
AUSTRALIA
Patents Act
ORIGINAL
COMPLETE SPECIFICATION STANDARD PATENT C
S
Application Number: 199 Lodgement Date: 2 nd September- 1999 Applicant Richardson Pacific Limited Invention Title: Ore Screening Panel System The following statement is a full description of this invention, including the best method of performing it known to the applicant.
Ore Screening Panel System This invention relates to improvements in ore screening panels used in the separation and grading of materials in the mining and quarrying industries.
Background to the invention Australian patent 482212 proposed a modular screening panel system for ore screening decks which is now widely used by the mining industry and replaced the earlier screening cloths, and large wire screening frames. The screening panels were all of the same size [eg. 300mm] and made of reinforced polyurethane. The panels are adapted to be secured to an underlying support frame using dependent spigots which are a force fit into corresponding apertures in the support frame. Patent 517319 provided an alternative method of securing 15 the panels to the frame using a pin expanded fastening concept.
A continual concern in the mining industry is to improve screening efficiencies and to reduce the need to replace worn panels. Screening efficiency varies with the ore type and the other conditions such as water content and the range of particle sizes.
20 Patent 579598 was an attempt to improve screening efficiencies by retarding the flow of particulate material across the screening surface by incorporating projections which roughen the surface. However screening efficiencies are still in need of improvement in screening ores containing significant proportions of oversize material in applications such as heavy media recovery, dewatering and the sizing of near size material.
Brief description of the invention To overcome these problems the present invention provides an ore screening panel having a) peripheral edge portions defining a screening surface b) said screening surface being formed by a plurality of parallel spaced apart ribs preferably having arched or angled top surfaces said ribs extending between opposed edge portions of said screen c) support ribs extending transversely across the panel beneath said screening ribs so that the screening ribs extend above the top of the support ribs d) surface protection ribs extending parallel to the screening ribs and being spaced apart by a plurality of said screening ribs said protection ribs projecting above the screening surface to provide an initial contact surface for oversize ore material.
This combination of screening ribs and parallel protection ribs is particularly advantageous in wet applications such as dewatering and heavy media recovery.
The parallel screening ribs extending above the underlying support ribs creates an appearance of parallel slots in the screening surface. The protection ribs are preferably of a height and width at least twice the width of the screening ribs.
These protection ribs are preferably spaced apart to form 4 screening zones on the screening surface. Thus there will be 3 protection ribs on the screening *eee :surface and if protection ribs are also desired on the edges of the screen their will Is be 5 protection ribs per panel. It is preferred that the protection ribs are at least 6cm square in cross-section and that they extend continuously across the panel.
0 It is not essential however that the protection ribs be continuous. The function of the protection ribs is to reduce wear and impact damage on the screening surface The screening ribs have arched or peaked top edges so that the slot openings in :the screening surface are tapered inwardly. Below the top edge the screening ribs are either of consistent width or preferably taper inwardly in the down ward direction so that the width of the slot gradually widens. This has been found to reduce the occurrence of blinding of the screening surface.
Detailed description of the invention A preferred embodiment of the invention will now be described with reference to the drawings in which: Figure 1 is a plan view of the screening panel of this invention; 3o Figure 2 is a sectional view along the line A-A of figure 1; and Figure 3 is an isometric view of the panel of figure 1.
The screening panel 10 is composed of polyurethane and has a screening surface 11 and securing means 13 along two parallel edges 14. Reinforcing such as fibre reinforced plastic or steel can be incorporated in the panel edges. In this embodiment a pin system of the sort described in patent 517319 is used, but the spigot system of patent 482212 is equally applicable. Other fastening systems can also be used.Materials with hardness, resilience and wear characteristics similar to polyurethane may be used and these include hard rubber formulations.
The panels shown are standard 300mm square panels but the invention is applicable to any style of panel including 600mmx300mm rectangular panels.
Extending parallel to the edges 14 are three strengthening ribs 15. The central rib may be thicker than the outer two and also incorporate reinforcing. Extending between the edges 14 are support ribs 16 that lie below the screen surface 11 but can be seen in figure 1. The screening ribs 17 extend through the support ribs 16 and also extend above the top surface of the support ribs16. The upper surfaces 18 of the screening ribs 17 form the actual screening surface. The rib surfaces 18 are triangular or peaked and the slots formed between ribs 17 initially narrow toward the junction of the upper surfaces 18 and the ribsl7. The ribs 17 below the upper surface 18 are tapered in width in a downward direction so that the slots widen again below the screening surface formed by the tops 18 of the ribs 17.
Projecting from the screening surface 11 are the protection ribs 19 which in this embodiment are upward extensions of the strengthening ribs 15 and the :edges14. The width of the ribs or bars 19 widen toward the screening surface.
In use the panels can be laid in any orientation. For wet screening, preferably the panels are laid with the screening ribs 17 and protection ribs 19 parallel to the direction of flow of the ore being screened. This produces a tumbling action on the ore particles particularly the oversize particles. The impact, from these oversize particles, is absorbed by the protection bars 19. In dry screening applications when the protection bars 19 and screening ribs 17 are transverse to the flow of the ore the impact of oversize particles on the bars 19 assists in breaking up the oversize ore particles.
Tests have shown that the life of the panels is increased as much as 40% by substituting panels of this design for standard screening panels of the same material.
Claims (4)
1. an ore screening panel having a) peripheral edge portions defining a screening surface b) said screening surface being formed by a plurality of parallel spaced apart ribs said ribs extending between opposed edge portions of said screen c) support ribs extending transversely across the panel beneath said screening ribs so that the screening ribs extend above the top of the support ribs d) surface protection ribs extending parallel to the screening ribs and being spaced apart by a plurality of said screening ribs, said protection ribs lo projecting above the screening surface to provide an initial contact surface for i. oversize ore material.
2. A screening panel as claimed in claim 1 in which the protection panels divide the screening surface into four zones.
3. A screening panel as claimed in claim 1 or 2 in which the upper surfaces of the screening ribs are arched or angled.
4. A screening panel as claimed in claim 1, 2 or 3, wherein the screening ribs below the upper surface are tapered in thickness in the downward direction. A screening panel as claimed in any one of claims 1 to 4 wherein the screening ribs and protection ribs are aligned with the direction of flow of the ore being screened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU45845/99A AU724980B2 (en) | 1998-09-03 | 1999-09-02 | Ore screening panel system |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPP5675 | 1998-09-03 | ||
| AUPP5675A AUPP567598A0 (en) | 1998-09-03 | 1998-09-03 | One screening panel system |
| AU45845/99A AU724980B2 (en) | 1998-09-03 | 1999-09-02 | Ore screening panel system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU4584599A true AU4584599A (en) | 2000-03-16 |
| AU724980B2 AU724980B2 (en) | 2000-10-05 |
Family
ID=25627354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU45845/99A Expired AU724980B2 (en) | 1998-09-03 | 1999-09-02 | Ore screening panel system |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU724980B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116984220A (en) * | 2023-09-26 | 2023-11-03 | 河南绿筑混凝土有限公司 | Concrete sewage grit splitter |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6017563A (en) | 1997-07-25 | 2000-01-25 | Novus International, Inc. | Process for optimizing milk production |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3307916A1 (en) * | 1983-03-05 | 1984-09-06 | Hein, Lehmann AG, 4000 Düsseldorf | SCREEN COVER WITH INTERCHANGEABLE SCREEN ELEMENTS |
| US4909929A (en) * | 1988-10-24 | 1990-03-20 | Norris Screen & Manufacturing, Inc. | Interlocking clamping system |
| US5361911A (en) * | 1994-04-14 | 1994-11-08 | Miller Wire Works, Inc. | Screening panel attachment system |
-
1999
- 1999-09-02 AU AU45845/99A patent/AU724980B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116984220A (en) * | 2023-09-26 | 2023-11-03 | 河南绿筑混凝土有限公司 | Concrete sewage grit splitter |
Also Published As
| Publication number | Publication date |
|---|---|
| AU724980B2 (en) | 2000-10-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PC1 | Assignment before grant (sect. 113) |
Owner name: ON=SCREENEX AUSTRALIA PTY LTD; FT=THE FORMER OWNER |
|
| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |