AU2018101165A4

AU2018101165A4 - Ore Crusher

Info

Publication number: AU2018101165A4
Application number: AU2018101165A
Authority: AU
Inventors: Trevor George Roberts
Original assignee: T K O Eng Australia Pty Ltd
Current assignee: Tko Engineering Australia Pty Ltd
Priority date: 2018-08-15
Filing date: 2018-08-15
Publication date: 2018-09-13
Anticipated expiration: 2026-08-15

Abstract

A jaw crusher for use in ore sampling process, having a frame, a pair of ore crushing jaws 5 mounted thereon and a ram for moving at least one of the jaws towards and away from the other to comminute ore particles located between them. The first jaw fixed in the frame and the second jaw pivotally attached to the frame for movement towards and away from the first jaw. The faces of each jaw each carry a crusher liner, and the crusher further comprises a rocker arm which is pivotally connected to the frame with one end of the arm being connected 10 to the ram and the opposite end of the arm connected to the first jaw. Each jaw has a fluid delivery assembly attached at or near its free end adjacent to its respective crusher liner. The fluid delivery assembly connected to a fluid supply and includes a means of cleaning adapted to clean the respective crusher liner. T.K.O. Engineering AU /FP 150818

Description

Ore Crusher

TECHNICAL FIELD

This invention relates to an ore crusher. In particular the present invention is described with reference to an ore crusher used in an ore sampling process. The ore crusher having serrated ore crusher liners which included integrally mounted cleaning apparatus to clean the crushed ore from the liner.

BACKGROUND

It is known to carry out an ore sampling process which includes the steps of a Go-Belt Sampler™ cutting a sample of ore from a particular stream of the ore, feeding the ore to a vibrating screen, then a jaw crusher, comminuting (reducing in size) the sample ore particles with the crusher, and feeding the communited ore particles from the jaw crusher to a secondary crusher for further comminution. Typically the process includes the step of feeding the further comminuted ore particles from the secondary crusher to a rotary splitter and extracting the ore particle sample for analysis from the splitter. A jaw crusher of the abovementioned type is described in South African Patent Application publication 983427 to Fran Sal Engineering CC (inventor: Francois Johan Roberts). A jaw crusher of this type includes a frame, a pair of ore crushing jaws which are mounted on the frame and a pneumatic or hydraulic ram for moving at least one of the jaws towards and away from the other to communite ore particles located between them. In one embodiment a first of the crusher jaws is fixed in the frame and second jaw is pivotally attached to the frame for pivotal movement towards and away from the first jaw. The faces of each jaw, which face each other, each carry a serrated replaceable serrated crusher liner. The ore crusher also includes a rocker arm which is pivotally connected to the frame with one end of the arm on one side of the pivot being connected to the ram and the opposite end of the arm of the arm connected to the first crusher jaw.

One of the disadvantages of the abovementioned ore crusher, is that the ore crusher has crushed sample ore that is always left over ore which over time causes the crusher to get clogged. In effect, left over crushed ore can impact the sampling process. This may result in the mine operator losing valuable production time and grade losses through each phase of the sampling process.

The present invention is to provide an ore crusher that overcomes at least one of the problems associated with the prior art.

SUMMARY OF INVENTION

In a first aspect the present invention consists of a jaw crusher for use in an ore sampling process, said jaw crusher comprising a frame, a pair of first and second ore crushing jaws which are mounted on said frame and a fluid actuated ram for moving at least one of said jaws towards and away from the other to communite ore particles located between them, said first jaw is fixed in the frame and said second jaw is pivotally attached to said frame for pivotal movement towards and away from said first jaw, the faces of each jaw, each carry a replaceable serrated crusher liner, and said crusher further comprises a rocker arm which is pivotally connected to said frame with one end of said arm on one side of a pivot being connected to said ram and the opposite end of the arm connected to said first crusher jaw, wherein each said jaw has a fluid delivery assembly attached at or near its free end adjacent to its respective said crusher liner, said fluid delivery assembly connected to a fluid supply and includes a means of cleaning adapted to clean said respective crusher liner.

Preferably said means of cleaning is a plurality of nozzles disposed at spaced apart intervals on its fluid delivery assembly, each nozzle fluidally connected to a gallery which in turn is connected to said fluid supply.

Preferably said jaw crusher includes a controller for controlling fluid delivery to said nozzles.

In one embodiment said fluid delivery assembly is a pneumatic assembly and said fluid supply is a compressed air supply, and said plurality of nozzles deliver air for impingement on said respective crusher liner.

In another embodiment said fluid delivery assembly is a water assembly and said fluid supply is a pressurised water supply, and said plurality of nozzles deliver water for impingement on said respective crusher liner.

Preferably at least a first sensor is fitted to said jaw crusher for monitoring at least one moving part of said jaw crusher, said first sensor operably connected to said controller.

Preferably said at least first sensor is used to monitor any one of jaw limit settings, jaw jamming, the plates upon which said crusher liners are mounted, or the stroke of said fluid ram.

Preferably at least a second sensor is fitted to the fluid circuit actuating said ram, said second sensor operably connected to said controller.

Preferably said second sensor is used to monitor the temperature or pressure of the fluid circuit.

Preferably said controller is a program logic controller or computer controller.

Preferably said controller is wirelessly connected to a monitoring computer for monitoring data received from said controller.

BRIEF DESCRIPTION OF DRAWINGS

Fig. 1 is a schematic elevational view of a an embodiment of jaw crusher in accordance with the present invention.

Fig. 2 is a plan view of the jaw crusher shown In Fig. 1.

Fig. 3 is an enlarged perspective view of one of the wedge locking keys (clamps) used in the jaw crusher shown in Fig. 1.

Fig. 4 is enlarged perspective view of the wedge locking key (clamp) shown in Fig. 3 with the internal gallery shown.

Fig. 5 is an even further enlarged cross-sectional schematic of wedge locking key (clamp) showing the interconnection of the inlet and nozzles via the internal gallery.

Fig. 6 is a schematic of the controller used to actuate air delivery to the nozzles, and the sensors connected to it, for the jaw crusher shown in Fig. 1.

BEST MODE OF CARRYING OUT THE INVENTION

An embodiment of the present invention will now be described with Figs. 1 to 6. Jaw crusher 10 comprises a frame 12 carrying a pair of crusher jaws 14 and 16, crusher liner plates 18 which are located in frame 12 on opposite sides of jaws 14 and 16, a hydraulic ram 20, a rocker arm 22 and a drive link 24 which is pivotally connected both rocker arm 22 and jaw 14 of crusher 10. Jaw crusher 10 additionally comprises a feed hopper above the jaws (not shown).

Crusher jaws 14 and 16 each consist of a backing plate 28, inter-engaging serrated crush liners 30. The liners 30 are removable from respective backing plates 28 and releasably held in position on plates 28 by wedge locking keys 50. Fastener apertures 58

Jaw 16 is rigidly mounted in frame 12 and jaw 14 is pivotally connected to frame 12 at pivot axis 32 for pivotal movement towards and away from jaw 16. Side liner plates 18 are rigidly located in frame 12 with as small a gap as is practical between themselves and moveable jaw 14.

In use, ore particles are fed into the hopper gravitate into the space between jaws 14 and 16 and liners 18. Ram 20 is activated to pull the end of rocker arm 22 downwardly and through the drive link 24, jaw 14 is drawn towards jaw 16 to crush particulate ore matter between. The crushing action is enhanced by reciprocation of ram 20. The comminuted ore particles gravitate from crusher 10 between the lower ends jaws 14 and 16.

Each wedge locking key (clamp) 50 is not only for clamping a liner 30 to a respective backing plate 28, but also comprises a “pneumatic assembly” for providing a means of cleaning to liner 30 to which it clamps. The pneumatic assembly includes an air inlet 53 fluidally connected to gallery 54 that in turn is fluidally connected to eleven nozzles 55. In use the air inlet 53 is connected to a compressed air supply 58 which is able to deliver air at about 10 bar (145 psi). The longitudinal axis of nozzles 55 are at an angle of about 17 degrees to the longitudinal axis of clamp 51, so that air delivered in a jet-like manner via nozzles 55 would impinge from the top downwardly on the respective adjacent liner 30.

In use, the compressed air preferably would be delivered via nozzles 55 during and after (or between) each crushing cycle, so that it impinges on respective liners 30, and cleans away any crushed ore particle samples that have been left behind.

On the inlet side of each pneumatic assembly of each wedge locking key (clamp) 51 there preferably will be a valve 56 operably connected to a controller 60, that allows for valve 56 to be opened at the desirous time in the ore crushing cycle to allow the pressurised air to be delivered via nozzles 55.

Controller 60 may also be preferably to connected to plurality of first sensors 65 on jaw crusher 10 for monitoring moving parts thereof, 10, as well as second sensors 66 in the hydraulic circuit 40 operating hydraulic ram 20. Sensors 65 may preferably be fixed at positions on various parts of jaw crusher 110 to help monitor efficiency and detect faults as the the crusher is operated.

Sensors 65 may preferably be sensing the proximity of jaws 14,16 to each other (jaw limit settings), jamming of jaws 14,16, backing plates 28 upon which liners 30 are fixed to and/or the hydraulic stroke length of ram 20.

Sensors 66, may be sensing hydraulic oil pressure and/or temperature readings. Other sensors (not shown) may also be used to measure the pressure of the compressed air being delivered to nozzles 55.

Controller 60 may be a program logic controller or CPU controller, and the sensed data received via controller 60 is preferably communicated via a computer network to a monitoring computer/system 74, that is operably connected a GSM Cellular Sender and Receiver 70 and a warning SMS controller 72. For example if the data received via the monitoring computer/system detects a fault with the operation of jaw crusher 110, an sms text message or email can be sent via a telecommunication system (not shown) to the smartphones or other telecommunication devices of the technical support team or mines operations personnel alerting them to the fault. This reduces response and break down times as technical support or other personnel will be immediately alerted so that they can promptly address any maintenance or repair that jaw crusher 110 requires.

It should be understood that the air delivery hoses, valving and other pneumatic equipment that are connected to clamp 51 have been omitted from Figs 1 and 2, for ease of reference and clarity.

It should be understood that the “pneumatic assembly” in the abovementioned embodiment is a “fluid delivery assembly”, and air is used where the ore is of low moisture content.

However, it should be understood that where the ore being mined has a high moisture content, then the “fluid delivery assembly” may instead be a “water assembly”, and the nozzles 55 instead would be for jetting pressurised water from a pressurised water supply, rather than the compressed air described earlier.

In the abovementioned embodiment, the “pneumatic assembly” of clamp 51 has eleven nozzles 55, however it should be understood that in other embodiments the number of nozzles may vary, and for example say be any of six to twelve nozzles.

Claims

CLAIMS:

1. A jaw crusher for use in an ore sampling process, said jaw crusher comprising a frame, a pair of first and second ore crushing jaws which are mounted on said frame and a fluid actuated ram for moving at least one of said jaws towards and away from the other to comminute ore particles located between them, said first jaw is fixed in the frame and said second jaw is pivotally attached to said frame for pivotal movement towards and away from said first jaw, the faces of each jaw, each carry a replaceable serrated crusher liner, and said crusher further comprises a rocker arm which is pivotally connected to said frame with one end of said arm on one side of a pivot being connected to said ram and the opposite end of the arm connected to said first crusher jaw, wherein each said jaw has a fluid delivery assembly attached at or near its free end adjacent to its respective said crusher liner, said fluid delivery assembly connected to a fluid supply and includes a means of cleaning adapted to clean said respective crusher liner.
2. A jaw crusher as claimed in claim 1, wherein said means of cleaning is a plurality of nozzles disposed at spaced apart intervals on its fluid delivery assembly, each nozzle fluidally connected to a gallery which in turn is connected to said fluid supply.
3. A jaw crusher, as claimed in claim 2, wherein said jaw crusher includes a controller for controlling fluid delivery to said nozzles.
4. A jaw crusher as claimed in claim 3, wherein said fluid delivery assembly is a pneumatic assembly and said fluid supply is a compressed air supply, and said plurality of nozzles deliver air for impingement on said respective crusher liner.
5. A jaw crusher as claimed in claim 3, wherein said fluid delivery assembly is a water assembly and said fluid supply is a pressurised water supply, and said plurality of nozzles deliver water for impingement on said respective crusher liner.
6. A jaw crusher as claimed in claim 3, wherein at least a first sensor is fitted to said jaw crusher for monitoring at least one moving part of said jaw crusher, said first sensor operably connected to said controller.
7. A jaw crusher as claimed in claim 6, wherein said at least first sensor is used to monitor any one of jaw limit settings, jaw jamming, the plates upon which said crusher liners are mounted, or the stroke of said fluid ram.
8. A jaw crusher as claimed in claim 3, wherein at least a second sensor is fitted to the fluid circuit actuating said ram, said second sensor operably connected to said controller.
9. A jaw crusher as claimed in claim 8, wherein said second sensor is used to monitor the temperature or pressure of the fluid circuit.
10. A jaw crusher as claimed in claim 3, wherein said controller is a program logic controller or computer controller.
11. A jaw crusher as claimed in claim 10, wherein said controller is wirelessly connected to a monitoring computer for monitoring data received from said controller.