EP0993340A1

EP0993340A1 - Device for feeding a material treating plant and vibratory mill equipped with same

Info

Publication number: EP0993340A1
Application number: EP98933725A
Authority: EP
Inventors: Jean-François Andre
Original assignee: F C B
Current assignee: FCB Ciment; Solios Carbone SA
Priority date: 1997-06-30
Filing date: 1998-06-26
Publication date: 2000-04-19
Anticipated expiration: 2018-06-26
Also published as: CA2295712A1; NZ501980A; TR199903298T2; DK0993340T3; RU2197325C2; CN1263482A; NO996552L; MA24588A1; DE69823828T2; EP0993340B1; DE69823828D1; CA2295712C; BR9810352A; AU8344798A; WO1999001222A1; FR2765122B1; AU741645B2; ES2221180T3; NO326433B1; FR2765122A1

Abstract

The invention concerns a device for feeding (1) a material treating plant (2) such as a mill, comprising an outer shell (3) and a bell (6), provided at least inside said outer shell (3) and fixed thereto, said bell (6) being arranged substantially oriented parallel to the direction of flow of the material, so as to enable said material to be deviated in order to protect elements (9) arranged downstream of said plant (2). The invention also concerns a vibratory mill (2) with vertical cone (16) equipped with such a feed device (1).

Description

TITLE: Material processing installation feeder and vertical cone vibrating mill equipped with such a device.

The present invention relates to a material processing installation supply device as well as a vertical cone vibrating mill equipped with such a device.

However, although more particularly intended for such applications, said feed device can also be used, in particular, with other types of grinders and crushers.

For a vibrating cone crusher to function properly, it is preferable that the machine works under load, that is to say that its grinding chamber is continuously stuffed with materials. Special care must therefore be taken in the design of its diet.

Currently, the most classic of the feeding systems is the chute attached to the device itself. The shape and dimensions may vary depending on the technology of the mill.

If these devices make it possible to force-feed the grinding chamber, they nevertheless have the drawbacks of generating a static pressure, due in particular to the mass of materials, which harms the efficiency of the machine and limits its performance. To overcome these drawbacks, certain devices have been devised such as, for example, those having a rotating chute.

Another device has also been developed consisting of a small hopper integral with the cone crusher, but having a flat bottom equipped with two horizontal discs. One of the discs is fixed and integral with the vertical cylindrical wall, and has openings in the form of spiral arcs centered on the arc of the disc. The second mobile disc has the same openings but a little wider.

The displacement of this disc by a jack thus makes it possible to partially control the openings by distributing the feed in the grinding chamber. Another known device consists of a chimney opening onto a distributor plate, provided above the mill and whether or not integral with the central cone of said mill, so as to distribute the material which flows in the crushing chamber around the cone. However, such devices have the drawback, in particular, of only allowing the treatment of fine particles.

Furthermore, in storage hoppers or silos, there are known emptying devices having a conical central equipment at the base of the hopper, intended to vibrate to facilitate the flow of the stored materials when they tend to stick and / or to form arches. The material is then refocused before it leaves the hopper.

It can therefore be seen that all of the devices mentioned above cause, when used with a cone crusher, the presence of material at the upper part of said cone, thus generating efforts which generate wear and consumption. energy and significant mechanical stress, possibly unnecessary.

The object of the invention is to provide a supply device which overcomes the aforementioned drawbacks and makes it possible to protect certain members of the installation equipped with said device, in particular from wear phenomena.

Another object of the present invention is to provide a feeding device which can be used with materials having a particle size which can vary over a wide range.

Another object of the present invention is to provide a device which makes it possible to carry out a continuous supply of the installation equipped with said device, while controlling the static pressure.

Another object of the present invention is to provide a vibrating cone crusher, equipped with a feed device, in which the wear in the upper parts, possibly non-active, of the cone is reduced or eliminated.

Another object of the present invention is to provide a vibrating cone crusher, equipped with a feeding device, in which the mechanical stresses on the cone are greatly reduced and / or displaced.

Another object of the present invention is to provide a vibrating cone crusher, equipped with a feed device, in which the static pressure inside the grinding chamber can be controlled.

Other objects and advantages of the present invention will appear during the description which follows which is given only for information and which is not intended to limit it. According to the invention, the material processing installation supply device such as, in particular, a grinder, comprises an outer casing and a bell, provided at least internally in said outer casing and subject to the latter, said bell being provided oriented substantially parallel to the direction of flow of the material, so as to allow a deflection of said material to protect members, provided downstream, of said installation.

The invention also relates to a vibrating mill with vertical cone equipped with such a feed device.

It will be better understood on reading the following description, accompanied by the attached drawings which form an integral part thereof and among which:

- Figure 1 describes, in a schematic radial sectional view, a first embodiment of the supply device according to the invention, - Figure 2 describes, in a schematic radial sectional view, a second embodiment of the feeding device according to the invention,

FIG. 3 describes, in a schematic radial section, a third embodiment of the supply device according to the invention,

- Figure 4 details the embodiment shown in previous figure 1,

- Figure 5 details the embodiment shown in Figure 2 above.

The present invention relates to a material processing installation supply device such as, in particular, grinder. It is thus, for example, a feed device in which the flow of material is facilitated by vibrations generated by said installation.

As shown in Figures 1 to 3, the feed device 1, according to the invention, of a material processing installation 2, comprises an outer casing 3. The latter is located, for example, under a storage hopper 4 from which said material flows, in particular, by gravity.

Said outer casing 3 has, for example, a form of symmetry of revolution, in particular frustoconical or cylindrical. Its axis of symmetry 5 is oriented, for example, substantially vertically, in particular in the extension of the longitudinal axis of said hopper 4 and / or that of said installation 2 which are also, optionally, provided substantially vertical.

According to the invention, said supply device 1 also comprises a bell-shaped element 6, provided at least internally in said external envelope 3 and subject to the latter. Said bell

6 is provided oriented substantially parallel to the direction of flow of the material. The latter can thus be deflected, according to the arrows identified 7, 8 thus enabling the protection of organs 9 of said installation 2. In fact, the said organ or organs which are provided downstream, are, at least partially, no longer in contact with the material. By “provided downstream” is meant, in particular, that said members 9 are located downstream of said supply device 1, under said bell 6, and / or, as shown, are capped by said bell 6. Said bell 6 is provided, in particular, flush and / or emerging at the outlet of said outer casing 3. It thus promotes an annular distribution of the material. Furthermore, said bell 6 has, for example, a form of symmetry of revolution, in particular cylindrical or cylindro-conical.

According to the various exemplary embodiments illustrated, the flow of material takes place vertically and the axis of symmetry 10 of said bell 6 is also provided, as appears from the explanations given above, oriented substantially in the same direction.

Said outer casing 3 and said bell 6 are secured to each other, in particular by means of wings 11, provided vertically and distributed regularly around said axis of symmetry 10 of said bell 6.

The supply device 1 according to the invention thus comprises, in particular, three said wings 11, arranged in stars and each spaced by 120 ° or four said wings 11, spaced by 90 °.

Said wings 11 could be provided, optionally, orientable for example by pivoting each around a substantially horizontal axis. They will thus make it possible, in particular to regulate the flow of material, by closing more or less the passage between the bell 6 and the outer casing 3, and to moderate the static charge.

As illustrated, said outer casing 3, said bell 6 and / or said member 9 are, for example, coaxial.

Referring now to Figure 4, we see that, according to a first embodiment, said outer casing 3 is in one piece. According to another embodiment, illustrated in FIG. 5, said outer envelope 3 consists of a lower element 12, called in the following text the chute, and an upper element 13, opening into said chute 12.

Furthermore, as illustrated in Figures 1, 3 and 4, said bell 6 is, for example, in one piece or, as illustrated in the other figures, consisting of a dome 14 and a tubular element 15, fitting into said dome 14.

When the outer casing 3 is formed, as previously mentioned, of two independent elements 12, 13, said bell 6, when it is in one piece, and / or its dome 14, when it is not, are in particular subject to said upper element 13. As for said tubular element 15, it is attached, for example, to said chute 12. According to certain applications, it may also be envisaged to provide a bell 6 rising upstream of said outer casing 3 and thus opening, for example, into the hopper 4.

The present invention also relates to a vibrating mill 2 with vertical cone 16 and crushing chamber 17 equipped with a feed device 1 as described above.

As previously mentioned, said device 1 is provided between a storage hopper 4 and said crusher 2 and allows the material to be supplied to the latter in particular under the combined effect of gravity and / or vibrations generated by said crusher 2. The bell 6 of said supply device 2 is provided, for example, above the crushing chamber 17 of said crusher 2 and thus makes it possible to protect the members 9 provided therein by isolating them at least partially from the material flow.

It is, in particular, said cone 16 provided, according to the various exemplary embodiments illustrated, opening outwardly above said crushing chamber 17. The bell 6 is then provided capable of covering, at least partially, the end emerging 18 from said cone 16, a residual space 21 being provided between these two members.

So no longer being directly surrounded by material at said end 18, said cone 16 is free in its movements, at least at this level, that is to say in particular, in an area where said cone 16 does not participate not fragmentation.

Wear is thus avoided. In addition, such an absence of material and the reduction in static pressures between the parts 16 and 19, obtained thanks to the insulation provided by the bell 6, greatly reduce the mechanical stresses on the cone 16, the latter then being able to vibrate, move, and / or turn with fewer constraints.

Said cone 16 and said bell 6 are, in particular, as already mentioned above provided coaxial.

With regard to said grinder 2, the latter comprises, by way of example, a frame 20 having a vibrating ring 19 provided at least partially, opposite said cone 16.

Said ring 19 is vibrated, in particular, using an unbalanced vibration device, not shown, mounted on the chassis 20 and thus allows the material to be crushed against said cone 16. Said ring 19 and said cone 16 are , in particular, coaxial, said cone 16 being optionally free to rotate about its longitudinal axis so as to facilitate the flow of the material during grinding.

As mentioned above, according to the various exemplary embodiments illustrated, the end 18 of said cone 16 is provided with an opening above said ring 19.

According to a first embodiment, said bell 6 protects said upper end 18, in particular, over the entire corresponding height of said cone 16, that is to say on the part of the cone 16 located above the upper edge of the ring 19. According to other embodiments, said bell 16 may also have a shorter or longer length, then entering the crushing chamber 17.

Said bell 6 thus covers, at least partially, the through end 18 of said cone 16.

Said outer casing 3 rests, for example, on said chassis 20 at the level of said ring 19. If said outer casing 3 is made up, as was previously mentioned, of a chute 12 and an upper element 13, said chute 12 is then subject, for example, to the chassis 20 while the upper element 13 is suspended from the hopper 4. In this regard, if an outer casing 3 is used in a single element, said outer casing 3 is subject directly or indirectly to said grinder 2 while remaining free vis-à-vis said hopper 4, under which it is arranged.

Such arrangements thus make it possible to separate said grinder 2 and said hopper 4, thereby limiting the transfer of static charges.

It should also be noted that, in order to be able to work in the wet process, if desired, the grinder according to the invention may comprise means for injecting a fluid, such as, in particular, water, into said chamber. crushing 2 from said feed device 1. A constitution in two parts 12, 13 of said feed device 2 also facilitates such introduction and distribution of water. In fact, the water injection can be carried out at the interface between said upper element 13 and said chute 12.

According to another embodiment, it is also possible to provide an injection at the level of the bell 6 in the residual space 21. For this, said wings 11 have, for example, a thickness allowing the passage of conduits up to said bell 6 .

However, according to an embodiment not illustrated, it could also be provided to subject said bell 6 to said chassis 20. Naturally, other embodiments, within the reach of ordinary skill in the art, could have been envisaged without departing from the scope of this application.

Claims

1. Feeding device (1) for installation (2) for processing material, such as, in particular, grinder, comprising an outer casing (3) and a bell (6), provided at least internally in said outer casing ( 3) and subject to the latter, said bell (6) being provided oriented substantially parallel to the direction of flow of the material, so as to allow a deflection of said material to protect organs (9), provided downstream, from said installation (2).

2. Device according to claim 1, wherein said bell (6) is provided flush and / or emerging at the outlet of said outer casing (3).

3. Device according to claim 1, wherein said outer casing (3), said bell (6) and / or said member 9 are coaxial.

4. Device according to claim 2, wherein said outer casing (3) consists of a lower element (12) and an upper element (13) opening into said lower element (12).

5. Device according to claim 4, wherein said bell (6) consists of a dome (14), secured to said upper element (13), extended by a tubular element (15), secured to said lower element (12) .

6. Device according to claim 4, wherein said bell

(6) is provided in one piece and subject to said upper element (13).

7. Device according to claim 1, wherein said outer casing (3) and said bell (6) are secured to each other by means of wings (11), provided orientable.

8. Vibrating mill (2) with vertical cone (16) and crushing chamber (17) equipped with a feed device (1) according to any one of claims 1 to 6.

9. A crusher according to claim 8, wherein said cone

(16) is provided opening outwardly, said bell (6) being provided capable of covering at least partially, the through end (18) of said cone (16) so as to isolate it from the flow of material.

10. Crusher according to claim 8, comprising a frame (20) having a vibrating ring (19), provided, at least partially, opposite said cone (16), said outer casing (3) resting on said frame (20) at said ring (19).

11. A crusher according to claim 8, further comprising means for injecting a fluid into said crushing chamber (17) from said supply device (1), said means for injecting a fluid being provided at said bell (6).