DE2255069A1 - DRUM FOR THERMAL TREATMENT OF WEARING GOODS - Google Patents

Description

P 2235

Polysius AG, Neubeckum

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Drum for the thermal treatment of abrasive material

The invention relates to a drum for thermal treatment of abrasive material, exchangeable with the inner drum jacket attached lifting shovels.

During the thermal treatment of goods, drums of this type are rotated and a gas flow passes through them, with there should be a heat exchange between the gas flow and the material to be treated. In order to be as good as possible To be able to achieve efficiency, the material to be treated is lifted up by the lifting shovels and conveyed through the drum, so that a cutie egg spreads at least over part of the drum cross-section so that a intensive contact of all good particles with the banding gas results. With this kind of treatment, all parts that come into contact with the goods are subject to wear and tear. so that these parts must be replaced from time to time.

To the drum inner wall both from wear and tear To protect against overheating by the material, it is known to use the lifting shovels with such a large, at the Plate-shaped blade root resting against the inner wall of the drum execute that the blade feet from each other in Uinfanpsrichtung connect neighboring lifting shovels to each other and <3 thus " Shield the inside of the drum from the goods to be handled. Since the parts of the »lifting shovels that are immersed in the material are exposed to particularly high levels of wear, the

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knew the design of the lifting shovels inevitably, that when it is necessary to replace worn ones Lifting shovels also a proportionate: large, hardly or less heavily worn part of the lift blade base need not be thrown away or sold as scrap.

The invention is therefore based on the object of a

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Tronmel of the type mentioned to create, which through a cost-saving design of the lifting blades Bweok-like covering of the inner wall of the drum.

According to the invention, this object is achieved by that on the circumference of the shell adjacent lifting blades are arranged at a distance from each other and separate, the Tromroelinnenmantel in the area between these Kubschaufeln provided against overheating and wear schötsende wear plates are. In this way, the shovel foot of each lifting shovel can be kept so small that it is still just large enough is the lifting scoop on the inside wall of the Trorranel to fix. If lifting scoops designed in this way have to be replaced due to wear, so only need the drum with the inventive drum effectively worn out parts of the drum can be replaced, while those opposite the lifting blades are less wear-prone wear plates are known to be used. This measure results in a considerable Cost savings in the course of the operation of a drum according to the invention.

According to an advantageous embodiment of the invention The lifting blade feet can be made essentially straight, while the wear plates reflect the curvature of the Drum inner wall are adapted. As a result, oils are largely independent of the diameter of a pub

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Drum so that the same for different Troramel sizes Bucket design can be used. This represents a considerable simplification and cost savings in storage of replacement lifting shovels.

The following are some embodiments of the invention explained in more detail using the drawing. F.s aeigen

Pig.i part of a cross section »through an inventive Drum j

Fig.2 is a plan view of a lifting shovel and one with this intermediate plate to be put together (moved apart);

3 shows an enlarged detail (cross section) of a Lifting shovel with an associated wear plate, according to a further exemplary embodiment the invention,

The drum i according to the invention shown in FIG. 1 (of which only a part is illustrated in cross section for the sake of simplicity) is used for the thermal treatment of abrasive material, for example for cooling hot cement clinker. A plurality of similarly designed lifting blades 3 are interchangeably attached to the inner drum shell 2 and consist essentially of the blade wall H and the blade root 5 fixed on the inner drum wall 2; the lifting blades 3 which are adjacent to one another in the circumferential direction of the drum guide LS 2 are arranged at a distance from each other. ·

Ira area between the Kubsa blades 3 sand separate, the Tromraelinnenmantel 2 in front of Oberhit-cung and-Ve-racMoifi Schütaende wear plates 6 provided. With the hler

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Bchaullchten exemplary embodiment eats between every two adjacent lifting blades 3 one on the inner drum shell 2 attached wear plate 6 designed in the manner of an intermediate plate is provided »which is attached to one end of the a saw blade root 5 extends to the adjacent end of the blade foot of the next following lifting blade 3. As a result, the grinding plates 6 shield the areas of the drum inner wall 2 that are not covered by the lifting blades 3 towards the goods to be handled; they educate on this Catfish provide protection against overheating and wear Drum inner wall.

As can be clearly seen from Pig. 1, the lifting blade feet 5 are essentially straight, while the wear plates 6 of the curvature of the drum inner wall 2 are adapted. This means that the same blade type can be used for drums with different inside diameters, because here the - in terms of scope - kept extremely short The blade foot 5 of each lifting blade is practically independent of the diameter. “This not only makes production easier of the HubBschaufeln (exact adaptation to the inner wall of the drum omitted), but also the preservation of Ereatz lifting shovels.

(Seen in Tromroelumfangsrichtung) depending on the application and size of the drum 1 and, depending on the distance between the individual lifting blades 3 can from case to case, his v /, the S-plates anneordneton between the lifting blades 6 is either - as in AEV ϊechten HflDfte (. ei * i'ir ^ .l illustrates L3t - integrally cd-rr - vi-2 shown in dtr Xini.tn HSlfte the Flg.l lot · - from wcnigri; ena i-wei parts 6a and 6b to produce VIe!. rnehvtt-! I3 r; o execution facilitates handling inubeoonderc · bri large Ab u'cii nc 'η (a neighboring Huncschaufeln) (I ": imV ^ iu t: i» f.

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change) the wear plates 6.

The lifting swings 3 and the wear plates 6 could now individually - by screwing or venting; - to your Trounellninnenmantel 2 be inflated, in which case the hub-BChaufelfttße 5 butt with the corresponding ends of the wear plates 6 would collide. It let however expedient to coordinate the lifting blades 3 and the wear plates 6 so that the lifting blades 3 through the wear plates 6 on the Troimnelimieninantel 2 fixed will. The lifting shovels 3 can be fastened to the inner wall of the drum in a clamp-like manner by means of the grinding plates 6 only the wear plates are grooved Screw 6 with the drum wall su (see. Pip · .I and 2). The claimner-like attachment can be seen in the drawing. evident way by simply overlapping the interacting ends τοπ blade root 5 and wear plate 6 take place; however, the overlapping portions could just as well be interlocking grooves and protrusions or have a wedge-like design.

The clamp-like attachment of lifting shovels 3 and Sanding plates 6 can be used both with one-piece and use with multi-part wear plates.

Conversely, however, the lifting blade feet could also be connected to the inner wall of the drum and in this way the wear plates 6 could be fixed by means of the lifting blades 3 '. In each of these two abundance it is achieved that the number of threefold fastening elements is not greater - al «ea would be necessary with the old design (overhead shovel with large plate-shaped shovel root).

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Another embodiment of the invention is in Pigt3 illustrates. In this Troinmel 11 i3t the Inner wall 12 - seen in the circumferential direction - through calibration adjoining grinding plates 16 covered, the are made in one piece. Each wear plate 16 has a recess 17 approximately in its central area, whose base area is smaller than the area of the Hubschaufelfufies 15, on which a fastening unptsvorepruriß 15a, which with your external dimensions is exactly in the recess 17 of the wear plate 16 fits into it. Tn that Projection 15a is provided with a through hole l8, which is opposite a corresponding hole 19 in the trouser jacket. Fastening screws (not shown) can then be inserted into these bores 18, 19, through which the lifting blades are attached to the drum wall will; at the same time by dleae fastening too the associated wear plate 16 on the inner wall of the Tromrael 12 set.

Ea should also be noted that the per se to the Curvature of the inner wall of the drum 12 adapted wear plate 16 has a flat surface section 16a in the region of its recess 17, the dimensions of which are at least «! so as large as the "footprint of the blade root" 15 are. Of the In this example, too, essentially straight The executed blade root 15 can therefore rest on the wear plate 16 with a relatively large area and press it against the inner wall of the drum 12.

As from the Flg. 3 can be seen throughout the world. it may be expedient, the loop ^ ϊβ plates on its inner wall 12 of the drum side facing mi c projecting rib 20 to perform 20a, of which the area ira OCE

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The ribs 20a lying in the recess 17 are in direct contact with the inner drum wall 12, while those at the end regions The ribs 20 located on the wear plate 16 (viewed in the direction of the surface) can have a small spacing from the inner wall 12 of the Ti'oranel. This design of the wear plates 16 enables a good adaptation to the drum inner wall 12, in particular also in the case of deformations that occur may result from the effects of Wfirae. Aue this Basically, it will also be expedient to place a small one between two wear plates 16 that are adjacent in the circumferential direction D ^ expansion gap 21 to be provided.

Finally, Ee can also be an advantage if the Lifting blades and the wear plates are made of different materials. On the catfish can for the mentioned parts of the rotary drum according to the invention Service life can be achieved.

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Claims (9)

Claims J Drum for the thermal treatment of abrasive Well, with lifting blades exchangeably fastened to the inner casing of the drum, characterized in that on the drum circumference; neighboring Lifting blades (3 or 13) are arranged at a distance from one another and separate, the inner drum shell (2 or 12) in the area between the lifting blades, wear plates protect against overheating and wear (6 or 16) are provided. 2. Drum according to claim 1, characterized in that between two adjacent lifting blades (3) A wear plate (6) is provided for each 3. Drum according to claim 1, characterized in that between two adjacent in drum circumferential direction Lifting shovels (3) each have a wear plate (6) consisting of at least two parts (6a, 6b). 4. »Drum according to claim 1, wherein the lifting blades each contain a plate-shaped blade root with which they are attached to the inner wall of the drum, characterized in that the lifting blade root (5) is essentially straight, while the wear plates (6) reflect the curvature of the inner wall of the drum (2) are adapted. 5. Drum according to claim 1, characterized in that the lifting shovels (3) are fixed by the Schlej.ßplatten (6) on the drum interior (2). 409822/0040 SAD Qp ₁ ! £ * *>■!; · ,! 6. Drum according to claims 4 and 5, characterized in that that the Hubechaufeln (3) with their blade feet (5) are fastened to the inner wall of the drum (2) like a clip by the wear plates (6). 7. The drum of claim 1, wherein the lifting blades each have a blade root with which they are fixed to the inner wall of the drum, characterized in that the lifting scoop troughs firmly connected to the inner wall of the tunnel at the same time fix the wear plates on the inner wall of the drum. 8. Drum according to claim 7, characterized in that the inner wall of the drum (12) is covered by adjoining wear plates (16) and each wear plate has at least one recess (17) in which a correspondingly shaped fastening projection (15a) of a lifting blade foot (15) is arranged. 9. Troiwnel according to claim I _9, characterized in that the lifting blades (3) and the wear plates (6) are made of different materials. 409822/0040