AU612021B2 - Mobile or stationary disintegrating plant for minerals, in particular for lump-size material - Google Patents

Description

NNr____ OPI DATE 16/10/89 APPLN. I D 331487 89

PCI

INTERNATIONALE AN] INTERNATIONALE ZU, AOJP 9 DAT I91~9_ PT NUMB ER PCT/EP8Y/00272 ntnaiakatnkaiikto4 I) Internationale Veroffentlichungsnummer: WO 89/ 09090 B02C 21/02, 23/08, 13./02 Al (43) Internationales Verdffentlichungsdatum: 5. Oktober 1989 (05.10.89) (21) Internationales Aktenzeichen: PCT/EP89/00272 (74) Gemeinsamer Vertreter: O&K ORENSTEIN KOP- PEL AKTIENGESELLSCHAFT, Patentabteilung (22) Internationales Anmeldedatum: 15. MWrz 1989 (15.03.89) 3020, Karl-Funke-Str. 30, D-4600 Dortmund I (DE).

(31) Prioritatsaktenzeichen: P 38 10 725.2 (81) Bestimmungsstaaten: AT (europiiisches Patent), AU, P 38 11 712.6 BE (europdisches Patent), CH (europdisches Patent), DE (europdisches Patent), FR (europiiisches Patent), (32) Priori tAtsdaten: 30. Mtirz 1988 (30.03.88) GB (europaisches Patent), IT (europiiisches Patent), 8. April 1988 (08.04.88) JP, LU (europaisches Patent), NL (europiiisches Patent), SE (europdisches Patent), US.

(33) Priorititsland: DE .Yier6ffentlicht (71) S IMON 34 DIRBMONcX SEE FCILIO (Iebrct NMM DflRFED L2AA cDC /4lef (72) ljy Thv- A c ed (54)Title: MOBILE OR STATIONARY DISINTEGRATING PLANT FOR MINERALS, IN PARTICULAR FOR LUMP-SIZE MATERIAL (54) Bezeichnung: MOBILE ODER STATIONXRE BRECHEREINRIGHTUNG FOR MINERALIEN, INSBESON- DERE GROBSTOCKIGES GUT (57) Abstract 2 A mobile or stationary disintegrating plant for minerals, 2 in particular lump-size material, comprises a chlarging device for K charging a disintegrator located at a considerable height above a 3 3 charging hopper and a belt conveyor for conveying the material I3 out of the plant. In order to reduce operating costs, and hence attrition in the disintegrator, to obtain a di-integrator of smaller6 dimensions than known disintegrators and to reduce the size and operating weight of the installation as a whole, the charging device for charging the disintegrator consists of paralIlel interspaced bars (12) and links (16) or the like arranged at right angles to the longitudinal direction of the bars (12) on or against which they slide, and the belt conveyor which conveys the material extends as far as below the ends of the bars located under the charging hopper (57) Zusammenfassung Die Erfindung betrifft eine mobile oder stationtire Brechereinrichtung far Mineralien, insbesondere grobstackiges Gut, mit einer Beschickungsvorrichtung zu einem insbesondere gegentiber einem Aufgabetrichter erh6hten Brecher und einem das Gut aus der Einrichtung abfbrdernden Bandf~5rderer. Es soll eine Brechereinrichtung dieser Gattung geschaffen werdcn, bei der die Betriebskosten, so auch der Verschleig des Brechers, gemindert, die Dimensionierung des Brechers gegentiber bekannten Brechern herabgesetzt und insgesamt die Gr63e und das Betriebsgewicht der Einrichtung gemindert wird. Hierzu ist vorgesehen, dag die Beschickungseinrichtung zu dem Brecher aus parallelen zwischen sich Zwischenrllume bildenden Stangen (12) und aus auf oder an diesen Stangen gleitenden, rechtwinklig zur Stangeldngsrichtung angeordneten Stegen (16) od. dgl. besteht, wobei der das Gut abf~rdernde Bandf~5rderer sich bis unterhalb der unter dem Aufgabetrichter gelegenen Stangenenden erstreckt.

I.

MOBILE OR STATIONARY CRUSHER PLANT FOR MINERALS, PARTICULARLY FOR LUMP-SIZE MATERIAL.

The invention refers to a mobile or stationary crusher plant for minerals and/or their rocks, particularly of lump-size material according to the generic part of the main claim.

A crusher charging device for the cement industry is known (pamphlet of the Westfalia Lunen Company), where the material is fed into a hopper, from where it is brought out to above the crusher with an upwards inclined feed conveyor, while below this crusher a corresponding discharge conveyor belt is arranged.

Further, a mobile crusher plant with a pre-grading e* device is known ("Aufbereitungs-Technik", Vol. 22, 1981, 15 issue 7, pp.362 to 366, especially In this plant the material is brought from a charging hopper to an upwards inclined conveyor belt, from the top ond of which the material reaches a pre-grading si .e which is directed inclined downwards. The provision of a grading device between the charging hopper and the conveying means, transporting the material to the crusher, would be also feasible. A so called bar sizer for rough separation is also known (Mogensen GmbH Co. KG, Wedel/Germany), which has bars, which are parallel to each other and form gaps between themselves, on which the oversize piece is retained and moved further on and where the distance between the bars, parallel to each other, can be varied.

In this case the bars are iiclined downwards, so that the oversize piece slides downwards on the bars, which may be vibrated.

It would be advantageous to produce a crusher plant of the type mentioned in the introduction, where the operating expenses, as well as the wear of the crusher can be reduced, the size of the crusher can be reduced in comparison with that of known crushers and altogether the

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la size and the operating mass of the plant can be reduced, which should preferably be achieved by technically simple and problem-free means.

In one broad form the present invention provides a mobile or stationary crusher and classifying apparatus for minerals, and having a charging device, a crusher, a classifying means installed between the charging device and the crusher and a belt conveyor extending below the classifying means, charging device and the crusher; Said classifying means comprising:a plurality of parallel and spaced bars; and a conveying means having a plurality of transport *straps which are arranged adjacent and at right angles to the longitudinal direction of the bars; 15 and at least two parallel chains which are connected S.to the straps for driving the straps in the direction of the bars, and wherein each of the chains are guiaed in a longitudinal recess of a respective one of said bars.

The advantage of the crusher plant according to the invention is in that, that only that material (oversize pieces) is transported on the bars upwards into the crusher which do not fall through the gaps between the parallel to each other bars. Generally speaking, depending on the composition of the material, in case of known plants the to-be-crushed portion is 20-50% of the total material feed. The plant according to the invention :provides therefore, that only the lump-size material, remaining on the bars, is conveyed to the level of the crusher, while the material falling through the gaps between the bars reach directly a discharging conveyor belt, onto which the crushed material, finally falling out of the crusher, also falls. The material I 4 which had been fed to the charging hopper and the material which has fallen downwards in the charging hopper is exposed already during the free fall to a mixing and grading, which is complemented when the material mixes with that on the bar grader.

The charging device is to be dimensioned smaller due to the smaller quantity of lump-size material, as well as the crusher requires a reduced width and a smaller feed opening. Due to this not only is a saving achieved in the construction, but also a saving of energy expenses and a reduced wear of the crushing tools in continuous operation. As the bar grader, in conjunction with the parts of the charging device moving on the bars, takes care of the conveying as well as of the grading, a clearly recognisable saving in height is the result, but particularly in the length of the plant.

In the drawing examples of the plant are illustrated in accordance with the invention and shown are: Figs. 1 Figs.3 Figs.4 and 2 and 5 and 6 in Figs.7 and 8 in Figs.9 to 11 a mobile and stationary plant, a cross-section through the charging device, details of the ends of the bars and of a link chain, means on the parallel bars, when the conveyed good has shell-shaped components, further embodiments of the bars and of the cogs guided on them.

The plant according to the invention consists basically of the charging hopper 1, the charging device 2 which is lying below the discharge of the hopper, the crusher 3 as well as the conveyor belt 4, while all parts in case of the embodiment according to Fig.1 are resting on a chassis 5, on the front of which (right hand side of Fig.1) a discharge belt 6 may be provided. The charging device, which is explained further in detail in Figs.3 to 8, has the function of a sieve and of a lifting conveyor in that sense, that the oversize pieces at 7 will reach the belt 4 and from there at [position] 8 are brought to the discharge belt 6. In contrast, the coarse pieces are conveyed with the aid of the charging device to the feeder 9 of the crusher 3 and there crushed, subsequent to which the crushed material falls again onto the belt 4 at [position] During the feeding or the falling of the material through the hopper 1 a grading of the fine and coarse [pieces] takes place already, so that the charging device brings to the crusher only coarse, lumpy material as oversize pieces and the fine [sized] material reaches quickly the belt 4. Accordingly, the charging device 2 can be dimensioned smaller, as only the oversize pieces, i.e. the coarse pieces are conveyed to the crusher, as well as the energy requirement of the charging device corresponds to the smaller amount of fed material.

While in Fig.1 a mobile crushing plant is illustrated according to the invention, Fig.2 illustrates a stationary plant. This plant can be equivalent to a plant which can move on caterpillar tracks. The equipment according to Fig.2 differs in its height from the equipment shown in Fig.1, as the conveyor belt 4 can be 2 provided either between the supports 11 which are arranged at the same height in pairs or between the caterpillar tracks. Here too, the belt 4 may have a slight incline relative to the horizontal plane, so that the entire construction can have a lower height in comparison with the embodiment shown in Fig.1.

The charging device 2 which acts simultaneously as a grading and conveying device has a number of bars 12 extending parallel to each other and from the lower end 2a to the upper end 2b of the charging device 2, which [the bars] may have the cross section, for example, of a rail. The upper and the lower ends of each bar 12 lies on a girder 13; the distance between the bars 12 can be chosen arbitrarily. Preferably a distance piece 14 each is provided between the bars 12, which keeps the upper and the lower end of the bar at a distance from the neighbouring bar and furthermore prevents a tilting of the rod on the girder 13. The distance pieces 14 are preferably constructed in screen sizes and are connected detachably with an angle piece 15, which is arranged on the girder 13.

As it can be seen from Fig.3, the undersize pieces U fall through the gap Z between the neighbouring parallel bars 12 at the height of the hopper 1 onto the belt 4; the oversize pieces K will be retained by the bars 12. Transport straps 16 extending completely or partialy over the width of the device 2 glide over the bars 12 in such a manner, that these [the transport straps] convey the course lumpy pieces K upwards to the feeder of the crusher 3. For this purpose each side of the feeder device has a U-shap d section 17, 18, the openings of which are facing each other. In the illustrated example in the centre of the transport device two U-shaped sections 19, 20 are provided, the openings of which are facing away from each other. In the sections 17, 19 on the one hand and in 18, 20 on the other, chains 21, 22, 23, 24 are guided, which, at the end of the bars 12, in a known manner wrap around sprockets 25, 26, 27, 28 of two chain shafts 29, 30. The connection of the straps 16 with the chains 17-20 can be carried out, in a known manner, like a scrapor conveyor or raker-type chain conveyor. Between the upper end of the bars 12 and the top chain shafts a gap can remain, through which the course pieces can fall into the feeder 9 of the crusher in the direction of arrow P of Fig.1.

The chains 17-20 may be constructed either as Gall chain or as link chains. In this case the links 31 can be provided with cross Srods 32, 33, between which a bar 34, positioned in the plane of the chain, is arranged. On this then a carrier 35 can be arranged in the form of a spigot, a lug or a transverse web.

So that the plant could be also used for material with shellshaped components, so called fishes, and to prevent the danger that these pieces upend between two neighbouring bars 12, below the hopper 1 at the feeding position of the material on the charging device between the bars 16 some additional transverse pieces 36 may be provided, which are preferably flush with the upper edge of the bars 12. If a shell-shaped part falls onto the transverse piece 36, these shell-shaped pieces tip over and lay flat on the bars 12, as this is illustrated in Fig.3. Instead of 3 J? A P I .L I I EI toi bars 36 in the gaps Z between the bars 12, chains 37 can be provided between the consecutive straps 16, which can be wrapped around the shafts 29, 30 and also enable the tipping of the shall-shaped material onto the neighbouring bars 12.

Instead of two pairs of chains 21, 22 and 23, 24, one pair of chain may suffice. The chain drive is arranged preferably between the crusher and the charging device, approximately at 38.

In case of the embodiment according to Figs.9 to 11 a hollow bar is being used, which has a U-shaped cross-section and has a longitudinal slot 41 which is open upwards. In the hollow bar the chain 42 is being guided, which can be a link chain and on which carrier fingers 43 are attached at a distance from each other which protrude from the slot 41. The bottom stringer of the chain 42a is also guided in a similar hollow bar 40a. Both legs of the hollow bar 44, 45 and 44a, 45a, respectively, may have a cover strap 46, 47 and 46a, 47a, respectively, between which the fingers 43 and 43a, respectively, protrude.

Between the two hollow bars 40, 40a a profiled section piece 48 can be provided, which connects and supports the hollow bars.

In case of the embodiment in accordance with Fig.11, the legs 44, are horizontal, so that the carrier fingers 43 protrude horizontally from the hollow bar If in the present drawing a crusher with top feed is illustrated, then the invention refers to the same extent to an impact shaft crusher, where the coarse pieces from the bars 12 are fed to its lower part. The advantage of this is that there is no need for the upwards conveying of the coarse pieces and particularly that the bars 12 serve as counter support for the coarse pieces. The straps 16 are in this case correspondingly constructed and arranged. Just like in case of an impact shaft crusher, in case of a crusher with a charging hopper a horizontal or even slightly inclined arrangement of the bars 12 is also feasible without abandoning the principle of using the bars with their webs or fingers simultaneously as means for grading and conveying.

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Claims (9)

1. A mobile or stationary crusher and classifying apparatus for minerals, having a charging device, a crusher, a classifying means installed between the charging device and the crusher and a belt conveyor extending below the classifying means, charging device and the crusher; Said classifying means comprising:- a plurality of parallel and spaced bars; and a conveying means having a plurality of transport straps which are arranged adjacent and transverse to the longitudinal direction of the bars; and at least two parallel chains which are connected to the straps for driving the straps in the direction of the bars, and wherein each of the chains are guided in a longitudinal recess of a respective one of said bars.

2. The crusher and classifying apparatus of claim 1, wherein ends of the bars are detachably connected to transverse girders so as to allow the distance between the bars to be varied for different screening sizes.

3. The crusher and classifying plant as defined in claims 1 or 2, wherein the parallel bars are combined into groups and each group has at least one pair of parallel chains with the transport straps arranged at right angles to and extending between the chains.

4. The crusher and classifying plant as defined in any one of claims 1 3, wherein each of said chains extend around sprockets at each end of the classifying means, with the chains of each group being driven by a respective drive shaft via the sprockets so that each group of chains are driveable independently from each other.

The crusher and classifying plant as defined in any one of claims 1 4, wherein the chains are GALL or link chains. l 0 S. S S. S SS« BA1- .N1T 0 I r; L 6

6. The crusher and classifying plant as defined in any one of claims 1 5, wherein the straps have a triangular, L- or T-shaped cross-section.

7. The crusher and classifying plant as defined in any one of claims 1 6, wherein the crusher is an impact shaft crusher, and that the bars of the classifying means extend at least as far as an inlet of the crusher.

8. A crusher and classifying apparatus as hereinbefore described with reference to, and as shown in the accompanying drawings. be C C C. CC C 0 Dated this 27 day of March 1991 ULRICH SCHWIER

.9. Attorneys for the Applicant F. B. RICE CO. s o CCC. C.0 et CCC. CCC. CC "NT 0