EP3354357A1

EP3354357A1 - Mobile aggregate processing plant

Info

Publication number: EP3354357A1
Application number: EP17275013.5A
Authority: EP
Inventors: Malachy RAFFERTY
Original assignee: Portafill International Ltd
Current assignee: Portafill International Ltd
Priority date: 2017-01-31
Filing date: 2017-01-31
Publication date: 2018-08-01
Anticipated expiration: 2037-01-31
Also published as: EP3354357B1

Abstract

A mobile aggregate processing plant comprising a mobile chassis and a crusher mounted on the mobile chassis via a mounting, the mounting including a plurality of height extenders able to alter the overall height of the mobile aggregate processing plant between a transport configuration and an operating configuration.

In this way, the overall height of the mobile aggregate processing plant can be lowered to achieve a suitable transport configuration, and raised to an operating configuration where there is no height restriction.

Description

The present invention relates to a mobile aggregate processing plant having a crusher on a mobile chassis.
Mobile aggregate processing plants are well known in the art, and generally comprise a mobile chassis with aggregate handling equipment such as a crusher and screen, mounted on a chassis. Typically, the processing plant includes a feed hopper or the like to help direct material into the crusher, and one or more conveyors able to transfer material processed by the crusher to a nearby location or other unit. An example of such a processing plant is shown in EP2883624A1 . Mobile aggregate processing plants are frequently used in quarries, building sites and the like, for crushing or comminuting larger material such as quarried stone, or waste materials such as rubble from demolished buildings.
One example of a crusher is a jaw crusher. Jaw crushers are particularly suitable for, rough crushing at quarries, or crushing of waste or construction materials. According to the operating principle of a typical jaw crusher, crushing takes place against or between two jaws, typically one being fixed and one being a moving jaw. The material to be crushed is fed with an excavator or wheel loader to a feed hopper, from where the material falls into the throat of the jaw crusher, or a feeder transfers the rock material towards the jaw crusher. The material to be crushed may also be recyclable material, such as concrete, bricks, or asphalt.
Mobile aggregate processing plants are typically large and heavy. For example, they can have a height of more than 2 metres, typically at least 3 metres, 4 metres or more, with a length of several metres, and a weight of several tens of tonnes. Typically, a processing plant is manufactured, and then transported to each and every location where they are used. The mobile chassis provides some local or on site mobility, but it is not intended to be suitable for delivery of the processing plant, and for travelling on roads between locations or sites.
The shapes of many mobile aggregate processing plants are typically 'bespoke', i.e. not 'conventional', and they therefore require non-standard or exceptional transport costs, in particular non-standard shipping costs. For example, for a processing plant that is not within a conventional size, in particular within a conventional container size, the Europe-US shipping costs are typically over $10,000, or even over $15,000. Subsequent exceptional road transportation to a final location or site adds to the final cost to a purchaser of the processing plant.
There are also certain 'transport' height regulations or restrictions on the roads of many countries, such as the UK and Germany, such as 4m, which prevent or affect the transport of larger mobile aggregate processing plants.
It is an object of the present invention to provide a mobile aggregate processing plant having a more conventional transport size, to dramatically reduce transport costs.
Thus, according to one aspect of the present invention, there is provided a mobile aggregate processing plant comprising a mobile chassis and a crusher mounted on the mobile chassis via a mounting, the mounting including a plurality of height extenders able to alter the overall height of the mobile aggregate processing plant between a transport configuration and an operating configuration.
In this way, the overall height of the mobile aggregate processing plant can be lowered to achieve a suitable transport configuration, and raised to an operating configuration where there is no height restriction.
Typically, the overall height of the mobile aggregate processing plant is considered relative to the surface, usually the ground surface, on which the chassis rests.
The crusher may be of any size, shape, design or arrangement, generally having one or more jaws or arms, an upper portion adapted to receive material, typically from a feed hopper or the like, and one or more discharge outlets, typically starting at a low or lower portion, optionally at the bottom of the crusher, and able to allow crushed material to pass out away from the crusher, typically on to one or more conveyor belts or the like.
Typically, space is provided beyond, typically below, a discharge outlet of the crusher, to allow discharged material to move away or fall away from the crusher and prevent blockages at the discharge outlet. Different crushers will typically have different discharge space parameters. One parameter can be a vertical gap or height from the discharge outlet. Any space provided beyond or below a discharge outlet is not required when the mobile aggregate processing plant is not in use, such as in its transport configuration, and the present invention can take advantage of using such space to reduce the overall height of the mobile aggregate processing plant in its transport configuration compared to its overall height in its operating position.
Optionally the crusher is moveable relative to the chassis to provide the change in overall height of the mobile aggregate processing plant between a transport configuration and an operating configuration.
The mobile chassis is typically formed of a frame having an undercarriage, typically a plurality of wheels on each side, optionally with a caterpillar-type track or tracking around the wheels in a manner known in the art.
Optionally, the crusher in the mobile aggregate processing plant is a jaw crusher, generally comprising a pair of opposing crusher jaws arranged to have an area between the jaws to crush material. Typically, the jaw crusher has an upper opening or throat for loading material into the crusher at or near the upper ends of the crusher jaws, and a lower discharge opening at or near the lower end of the jaws.
One or both of the jaws are moveable relative to the other jaw and/or jaw supporting elements, typically in a reciprocal or 'to and fro' motion, and optionally with an eccentric drive arrangement and/or mechanism, to carry out cycles of crushing and relieving action between the jaws to reduce the size of the loaded material to a smaller aggregate size for discharge through the lower discharge opening.
Typically, one jaw of a pair of crusher jaws in a jaw crusher is fixed, and one jaw is moveable, and material to be processed through the jaw crusher is provided from a feed hopper or the like having a hopper discharge end at or near or above the upper loading opening of the jaw crusher.
The present invention is not limited by the nature of the jaw crusher or its operation. Jaw crushers are known in the art, and optionally the crusher of the present invention has a throat or loading opening for material being >350mm by >150mm. Optionally, the crusher has a loading opening being >500mm by >200mm, more optionally >700mm by >350mm, and more optionally >800mm by >400mm, such as 800mm by 500mm. Those skilled in the art will recognise that the size of the loading opening is not critical, and can be based on one or more of the dimensions listed above, along with other dimensions being the same or a combination of the same.
Optionally, the mobile aggregate processing plant further comprises at least one conveyor, optionally a conveyor having a first end located below a crusher discharge outlet, and a second end extending beyond the mobile aggregate processing plant.
Optionally, the mobile aggregate processing plant has a conveyor which is foldable at at least one position along the length of the conveyor between each conveyor end, typically at or approximately a midpoint or median of the conveyor length. In this way, the mobile aggregate processing plant can have a conveyor which in its operating configuration can extend beyond the height of the remainder of the processing plant, and which in its transport configuration can be within the height of the remainder of the processing plant, as discussed hereinafter.
Alternatively and/or additionally, the mobile aggregate processing plant has a conveyor which is removable and/or de-constructible and/or otherwise moveable in a manner known in the art, in order to achieve an overall height of the mobile aggregate processing plant in its transport configuration which does not extend higher than the remaining parts of the mobile aggregate processing plant as discussed hereinafter.
Optionally, the mobile aggregate processing plant comprises a feed hopper for providing feed material to the crusher. Optionally, one or more parts of the feed hopper are moveable between a transport configuration and an operating configuration, optionally to help reduce the overall height of the processing plant in its transport configuration.
Optionally, the mounting of the mobile aggregate processing plant comprises at least two height extenders. Optionally, the mounting comprises four height extenders, optionally arranged in a square or rectangular configuration on the chassis.
The height extenders may comprise any suitable design, size or shape, able to alter the overall height of the mobile aggregate processing plant between the transport configuration and the operating configuration, relative to the chassis.
According to one embodiment of the present invention, the height extenders comprising tie rods, or adjuster rods, or upstanding bolts. The rods or bolts are optionally threaded, and made with complimentary female parts on one or more of the crusher and the chassis. Optionally, the height extenders may include one or more plates and/or nuts, adapted to work in conjunction with the upstanding rods or bolts, in order to alter the overall height of the mobile aggregate processing plant According to another embodiment of the present invention, the height extenders comprise one or more rams or hydraulic actuators or both.
Optionally, the mounting is able to move the crusher between a transport configuration and an operating configuration relative to the chassis. The movement may be in any direction to achieve alteration of the overall height of the mobile aggregate processing plant. For example, the mounting able is to vertically move the crusher between a transport configuration and an operating configuration relative to the chassis.
Optionally, the mounting comprises at least two, optionally four, of the group comprising: tie rods, adjuster rods, upstanding bolts, rams and hydraulic actuators, located between the chassis and the crusher, able to provide vertical movement of the crusher relative to the chassis between the transport configuration and the operating configuration.
Optionally, the mobile aggregate processing plant further comprises one or more securers able to secure the crusher either in its transport configuration, or in its operating configuration, or both. The securers may comprise one or more locking nuts, bolts, pins or members, etc., able to provide securement of the position of the crusher relative to the chassis.
Optionally, the present invention is able to alter the overall height of the mobile aggregate processing plant by more than 250mm between its transport configuration and its operating configuration. Optionally, the overall height is able to alter by up to 400mm or more between its transport configuration and its operating configuration.
In one embodiment of the present invention, the crusher is able to move by more than 250mm, and up to 400mm or more between its transport configuration and its operating configuration relative to the chassis.
As mentioned above, there are various 'transport' height restrictions in many countries, such as the UK and Germany, which can restrict the transport of larger mobile aggregate processing plants. There are well known height restrictions on many public roads, railways and other transport paths or links. Thus, being able to lower the overall height of the mobile aggregate processing plant of the present invention may allow a large mobile aggregate processing plant to meet such transport height restrictions, and/or significantly reduce the requirement for any special permits or conditions. In the way, the present invention can allow larger sized mobile aggregate processing plants to be conveniently transported from place to place.
Transport containers, such as shipping or haulage or road containers, are also well known in the art, and typically have a number of known and regular dimensions, to provide compatibility with the means of transport, such as trucks and/or transport vessels including ships. One well known form of transport container is the "ISO 40 foot" container whose general internal dimensions are approximately 12m in length, between 2.3 and 2.4m in width, and 2.4m in height. As the ISO 40 foot container is so well known and used, the cost of shipping an ISO 40 foot is now a relatively world wide standard cost compared to the cost of shipping a bespoke piece of machinery.
Also known in the art are ISO 40 'high cube' containers, typically having the same length and width as the standard ISO 40 foot container, but having a higher height of 2.7m with a door aperture height of up to 2.6m, typically close to 2.6m.
In a particular embodiment of the present invention, the mobile aggregate processing plant of the present invention can be located within an ISO high cube container in its transport configuration. In this embodiment, the mobile aggregate processing plant has a transport configuration with an overall height from a ground surface of less than 2.6m, and an operating configuration having a height from a ground surface of greater than 2.6m.
According to a second aspect of the present invention, there is provided a method of altering the overall height of a mobile aggregate processing plant comprising a crusher mounted on a mobile chassis via a mounting comprising a plurality of height extenders, comprising at least the step of;
using the plurality of height extenders to alter the overall height of the mobile aggregate processing plant between transport and operating configurations.
In one embodiment, the method of the present invention is a method of moving, preferably vertically moving, a crusher mounted on the mobile chassis of a mobile aggregate processing plant having a vertical height of the crusher in its transport configuration of less than 2.6m from a ground surface, and a vertical height in its operating configuration from a ground surface of more than 2.6m.
Embodiments of the present invention will now be described by way of example only and with reference to the accompanying drawings in which:

Figure 1 is a side schematic view of a mobile aggregate processing plant in its operating position according to one embodiment of the present invention;
Figure 2 is a perspective view of the mobile chassis and the crusher of the processing plant of figure 1;
Figure 3 is a perspective view of Detail A in figure 2;
Figure 4 is a perspective view of Detail B in figure 2;
Figure 5 is a side view of a part of the mounting between the mobile chassis and the crusher of the processing plant of figure 1;
Figure 6 is a side schematic view of a mobile aggregate processing plant of figure 1 in its transport position; and
Figure 7 is a perspective view of the mobile aggregate processing plant of Fig 6 in a high cube container.

Figure 1 shows a side schematic view of a mobile aggregate processing plant 2 in accordance with one embodiment of the present invention, in an operating configuration.
The processing plant 2 comprises a mobile chassis 4 on a ground surface 3, a crusher 6, and a conveyor 8. Figure 1 also shows the path or direction of material to be processed by the processing plant 2 as a number of arrows 102/104/106/108/110, described hereinafter.
The layout and operation of the processing plant 2 as shown in figure 1 is in general similar to conventional mobile aggregate processing plants, based on having a chassis 4 on an undercarriage 12, generally being in the form of two caterpillar-type tracks located at or on each side of the chassis 4, to provide some local mobility of the processing plant 2 at a location or at a particular site. Caterpillar-type undercarriages 12 are well known in the art and are not further described herein.
The chassis 4 includes a conveyor mounting unit 14 able to house and support the conveyor 8. The conveyor 8 is typically based on a conveyor belt (not shown in figure 1) moveable about two end drums 16, with a lower end of the conveyor 8 being below a discharge outlet of the crusher 6 to initially transport material away from the crusher 6 in the direction of arrow 106, along to arrow 108, and an upper end, typically higher above the ground surface 3, having a discharge able to pass processed material in the direction of arrow 110.
Typically, feed material to be processed by the processing plant 2 is fed as per arrow 102 into a suitable area, typically formed in the nature of a hopper having raised sides 32. The feed material may be deliberately urged by one or more elements, belts or similar, to pass as per arrow 104 into an inlet opening of the crusher 6.
It can be seen from figure 1 that the processing plant 2 in its operating configuration has significant dimensions.
It is known in the art that a conveyor 8 can be either fully removed from a conventional mobile aggregate processing plant, or either partly removed, especially towards an upper end, and/or folded, typically around a centre or near centre junction. In the embodiment shown in figure 1, the conveyor 8 is hinged at a central mid or near midpoint 30 along the length of the conveyor 30, to create upper and lower conveyor sections, such that an upper section can be detached or folded to provide a more compact overall mobile aggregate processing plant 2.
The raised sides 32 of the feed area are also removable or foldable or hingeable or otherwise separable, or a combination of the same, so as to help reduce the overall height of the processing plant 2 at the feed area of the processing plant 2.
However, conventional mobile aggregate processing plants are otherwise fully and rigidly formed, so that the limiting factor in considering the transport costs of a conventional mobile aggregate processing plant is the overall height of the processing plant above a ground surface. Hitherto, the crusher is very firmly fixed on the chassis.
The crusher 6 of the example of a mobile aggregate processing plant 2 of the present invention shown in figure 1 is a jaw crusher, comprising two jaws, one being a fixed jaw 20 at an oblique angle relative to the ground surface 3, and a moveable jaw 22 generally being in a perpendicular direction to the ground surface 3, and moveable via an engine 24 engaging the moveable jaw 22. A fly wheel 26 on each side of the top end of the moveable jaw 22 provides inertia for the moveable jaw 22, to help operate the moveable jaw 22 in the manner of the known operation of a jaw crusher, wherein cycles of crushing and relieving action on material provided into the crusher 6 reduce the material to a size that allows its discharge or exit through the lower discharge opening between the jaws 20, 22 and onto the lower end of the conveyor 8 for discharge from the processing plant 2 in the direction of arrows 106, 108 and 110.
In its operating configuration, the processing plant 2 shown in Figure 1 has a height above the ground surface 3 to the top of the fly wheels of h1.
It is one particular feature of crushers, in particular jaw crushers, to seek to maximise the loading opening, so as to be useable for as many different locations or sites or operations. As such, it is desirable to use the largest size of jaws, and opening thereinbetween, possible, for the same purpose. However, increasing the size of the jaws and the loading opening requires greater power, and in particular a relative increase in the size of the associated fly wheels for the moveable jaw. With increasing size of fly wheels, there is increasing extent of the fly wheels above the highest level of the chassis above a ground surface.
It is another particular feature of crushers, in particular jaw crushers, to have an appropriate space or height below its discharge outlet, to allow processed material to sufficiently fall away, and so to prevent blockages at the discharge outlet. Typically, the bigger the appropriate space or height below its discharge outlet, the better
Conventionally, a crusher is secured to the chassis during manufacture, so that the conventional crusher has a fixed set of dimensions for the processing plant, which, if not available to match transport height restrictions, typically road height conditions, and/or any suitable transporting facilities such as a standard ISO 40 foot container, requires bespoke transport consideration. Bespoke transport typically requires exceptional transport costs, in particular shipping costs. Such shipping costs can currently exceed $15,000 or more, as the jaw crusher requires exceptional or non-standard space to be transported.
The present invention can take advantage of the space or height required in use below the discharge outlet of the crusher, to alter the overall height of the mobile aggregate processing plant between a transport configuration and an operating configuration. Lowering the overall height of the mobile aggregate processing plant allows certain mobile aggregate processing plants to meet certain transport height regulations or restrictions. In the way, the present invention can allow larger sized mobile aggregate processing plants than hitherto possible to be conveniently transported from place to place.
By way of example, Figure 7 shows a standard high cube dry container 50 having a length L width W and height H. For a standard "40 ft High Cube" dry container, the length is 12m, the width is 2.35m and the height is 2.7m, with a door aperture height of 2.6m.
Other dimensions of ISO and dry containers are known in the art, in particular the standard "20 foot" and "40 foot" dimensions, and the present invention is not limited by the dimensions of any container, in particular any standard shipping container.
The cost of shipping a standard container is typically less than half, possibly at or less than a quarter, for shipping a bespoke piece of machinery having dimensions beyond those of the standard shipping container. Hence, it is a particular advantage of the present invention to reduce the outer dimensions of the processing plant 2 from an operating configuration, such as shown in figure 1, to a transport position, such as shown in Figures 6 and 7 as described hereinafter, so as to significantly reduce delivery costs, in particular shipping costs, (and to also significantly reduce any subsequent transport costs of the processing plant 2 between different sites or operations, where public transport or public highways or public transport routes are required).
Figure 2 shows a perspective view of the chassis 4 with its undercarriage 12 and conveyor unit 14, and without other parts of the processing plant 2 for clarity purposes. Figure 2 also shows a crusher 6 as a separate or separable unit, and the fly wheels 26. Figure 2 includes a Detail A and a Detail B.
Figure 3 shows enlarged Detail A of figure 2. Figure 3 shows an example of a height extender of the present invention in relation to one corner of the crusher 6. Figure 3 shows an expanded view of a locking plate 34, optional locking wedge 36, rubber mount pad 38, adjustor plate 40 and adjustor rod 42.
Figure 4 shows enlarged Detail B of figure 2, wherein the rubber mount pad 38, adjustor plate 40 and adjustor rod 42 are fixed to a mounting position 44 of the chassis 4.
Figure 5 shows detail of the mounting of the part of the crusher 6 shown in Figure 3 with the rubber mount pad 38, adjustor plate 40 and adjustor rod 42 shown in Figure 4, to provide a mounting between the crusher 6 and the chassis 4. The lock plate 34 is fitted over a portion of the crusher 6 to engage with the adjustor rod 42. The adjuster rod 42 has two slots along one elongate side, to assist alignment of the lock plate 34 with complementary shoulders 44 on the crusher 6.
During manufacture, the crusher 6 can be lowered as shown in Figure 2 onto the chassis 4 using a suitable crane (not shown) to rest on the adjustor plates 40, one at each approximate corner of the crusher 6, using the rubber mount pads 38 to cushion the conjunction of the crusher 6 onto the adjustor plates 40, followed by the location of the locking plates 34 (and locking wedges 36 thereinbetween to achieve the desired conjunction as shown in figure 5). In this way, there are a plurality of height extenders acting as the mounting between the chassis 4 and the crusher 6.
Rotation of the adjustor rods 42 can now change the position of the crusher 6 relative to the chassis 4, optionally by at more than 250mm, such as by 400mm or more.
During manufacture, the crusher 6 may be directly lowered onto the chassis 4 to achieve the desired transport position. Alternatively, rotation of the adjustor rods 42 changes the vertical displacement of the crusher 6 relative to the chassis 4 to achieve the desired transport configuration, wherein the crusher unit 6 is in a compact position relative to the chassis 4, in particular such that the uppermost height of the processing plant 2, for example being the top of the fly wheels 26, is at or below the uppermost height of the remainder of the processing plant 2.
This transport configuration is shown in figure 6, wherein the crusher unit 6 is shown to be not higher than the top of the remainder of the processing plant 2, and an upper section of the conveyor 8 is also removed about a dividing point 30. Thus, in total, the mobile aggregate processing plant 2 is shown in figure 6 having a height h2 in its transport position, which is locatable within a suitable shipping container 50 as shown in figure 7 because h2 is less than the height H of the shipping container 50. The shipping container 50 in Figure 7 is part cutaway to show the mobile aggregate processing plant 2 in its transport position therein.
To achieve an operating configuration, the user can turn the adjustor rods 42 so as to increase the vertical distance between the crusher 6 and the chassis 4, until there is the desired gap or distance between the bottom of the jaws, 20, 22, generally defining the lower discharge opening of the crusher 6, and the lower end of the conveyor 8. Typically, it is desired to have at least a distance of 400mm, optionally being 450mm or even 500mm, between the end of the jaws of a crusher and the lower end of a conveyor, to allow sufficient distance for processed materials to fall without blocking the discharge part of the crusher. Those skilled in the art will appreciate that different dimensions are possible between the discharge end of a crusher and a conveyor for different dimensions of crushers, chassis, and combined processing plants.
In the present invention, the applicants have found that a mobile aggregate processing plant having a loading opening (between two jaws of a jaw crusher) of dimensions 850mm x 500mm, can be located within a ISO high cube 40 foot container having a maximum door height dimension of 2.6m.
The present invention also allows larger mobile aggregate processing plants to be transported along public highways or rail etc. within the same height regulations or restrictions. For example, the usual road transport height in Germany is 4m, and a conventional road haulage trailer may have a ground surface height of 900mm, so that the present invention can transport mobile aggregate processing plants which may have an operational overall height of over 3.5m, but which can have a transport height of 3.1 m or less.
The present invention provides a mobile aggregate processing plant able to use a plurality of height extenders such as adjustor rods or similar to alter the overall height of the mobile aggregate processing plant between transporting and operation configurations, allowing the processing plant to be transported in its transport configuration in a suitable standard transport container, such as a shipping ISO container, or along certain height restricted public highways or rail, etc. links, dramatically reducing transport costs, not only between the place of original manufacture and first use, but also between subsequent use or operating locations, where the mobile aggregate processing plant can be fitted within a standard transport container in its transport configuration.

Claims

A mobile aggregate processing plant comprising a mobile chassis and a crusher mounted on the mobile chassis via a mounting, the mounting including a plurality of height extenders able to alter the overall height of the mobile aggregate processing plant between a transport configuration and an operating configuration.
A mobile aggregate processing plant as claimed in claim 1 wherein the crusher is a jaw crusher.
A mobile aggregate processing plant as claimed in claim 1 or claim 2 wherein the crusher has a opening for aggregates being >350mm by >150mm, or >500mm by >200mm, or >700mm by >350mm, or >800mm by >400mm.
A mobile aggregate processing plant as claimed in any one of the preceding claims comprising a mounting able to move the crusher between a transport configuration and an operating configuration relative to the chassis.
A mobile aggregate processing plant as claimed in claim 4 comprising a mounting able to vertically move the crusher between a transport configuration and an operating configuration relative to the chassis.
A mobile aggregate processing plant as claimed in any one of the preceding claims further comprising a foldable conveyor having a first end located below a crusher outlet, and a second end extending beyond the mobile aggregate processing plant.
A mobile aggregate processing plant as claimed in any one of the preceding claims wherein the mounting comprises at least two height extenders.
A mobile aggregate processing plant as claimed in claim 7 wherein the mounting comprises four height extenders, optionally wherein the four height extenders are arranged in a rectangular configuration on the chassis.
A mobile aggregate processing plant as claimed in any one of the preceding claims wherein the height extenders comprise upstanding bolts.
A mobile aggregate processing plant as claimed in claim 9 wherein the height extenders having screw threads, and the chassis and crusher have apertures with complementary screw threads.
A mobile aggregate processing plant as claimed in any one of the preceding claims wherein the height extenders comprise one or more rams or hydraulic actuators or both.
A mobile aggregate processing plant as claimed in claim 11 wherein the mounting comprises at least two, optionally four, hydraulic actuators located between the mobile chassis and the crusher.
A mobile aggregate processing plant as claimed in any one of the preceding claims able to alter the overall height of the mobile aggregate processing plant more than 250mm, optionally by 400mm or more, between its transport configuration and its operating configuration.
A mobile aggregate processing plant as claimed in any one of the preceding claims able to be located within an ISO high cube container.
A method of altering the overall height of a mobile aggregate processing plant comprising a crusher mounted on a mobile chassis via a mounting comprising a plurality of height extenders, comprising at least the step of;
using the plurality of height extenders to alter the overall height of the mobile aggregate processing plant between transport and operating configurations.