DE1061598B - Device for grinding hard, lumpy material, especially coke - Google Patents

Description

GERMAN

The subject of the main patent application St 8128 III / 50 c is a device for grinding hard, Lumpy material, especially coke, with a closed, constantly a certain amount of grist without Containing grinding media, with high, the formation of a permanent Mählgutringes on their inner surface effecting speed rotating drum, in which at least one at a distance from the inner Outer surface running transversely to the direction of movement of the grinding material ring, determining its thickness fixed wall is provided, which holds back parts of the ground material and thereby a frictional effect causes between these parts and the Mahlgutring, and from which the ground material by an air stream is carried out. This device is characterized in that the between the end walls extending wall is directed against the drum circumference that a substantially stationary in front of her Grist accumulation forms and that in the direction of rotation of the drum there are no built-ins in front of the retaining wall are provided, the formation of an exposed rear surface of the accumulation in the outer area hinder. The previously known devices for grinding hard and lumpy material on the other hand, this MahlvoTrichtung is characterized by a particularly economical way of working, above all but all parts of the device that come into contact with the ground material are significantly less worn the end. The grinding action is based on the principle of using the ground material itself for grinding further good, inasmuch as regrind parts of different speeds are constantly changing brought into sliding contact with each other and rubbed against each other by the resulting friction will. In the drum rotating at high speed, some of the material is given up Grist under the influence of centrifugal force as a revolving ring in the manner of an additional and rough wall lining held on the drum circumference and under each in front of the in the drum Grist which has accumulated in the baffle is moved through it, partly mixed with it and partly exchanged for parts from this accumulation.

The whole thing is gradually ground to the finest dust, which in the known way by a Air flow passed through the drum, preferably by warm air, is discharged from the drum will. The quantities of ground material discharged as dust are continuously replaced by freshly added Regrind replaced. The drum of the grinding device according to the main patent runs around a horizontal one Axis around.

It has been found that the same effect as in the device according to the main patent application device for grinding hard, lumpy material, especially coke

Addition to patent application St 8128 III / 50 c (Auslegeschrift 1 057 419)

Applicant: '

City of Düsseldorf, Stadtwerke, represented by its Qberstadt director, Düsseldorf, Luisenstr. 105

Alfred von Weihe, Düsseldorf ,. has been named as the inventor

Dung achieved and a particularly simple structure of the device results when you use the drum arranges that it rotates about a vertical axis. The comminution principle, as stated in the main patent is under protection, is not changed. Here, too, occurs namely under the influence of centrifugal force on the inner circumference of the drum a layer of ground material running around it, on which further material is fed Good in front of a standing storage wall or in front of several such walls in opposite directions the direction of rotation of exposed accumulation accumulates, then regrind parts from the accumulation in front of each The retaining wall and from the surrounding grist ring grind each other. At the same time also come as a result the movement between the regrind ring and the accumulation of regrind and the energy exchange that takes place Parts within the ring and within the agglomeration move and grind with respect to one another more or less completely at one another.

A plurality of baffles are preferably arranged distributed around the axis of rotation of the drum. Their shape is adapted to the circumference of the drum, SO 'that it as a uniform in the subject matter of the parent patent application in practically the entire radial extent of the encircling Mahlgutringes with the drum inner wall everywhere, forming the thickness of the gap-determining Mahlgutringes.

As with the subject of the main patent application, the drum here is also driven by a gas stream

Claims (2)

crossed out, which discharges the ground material from the drum. However, a grinding device is known in which a drum revolving around a vertical axis and having a permanent grinding material ring on its outer surface, the grinding material is fed through shafts opening at a distance from the drum shell, so that a frictional effect between the material emerging from the shafts and the permanent grinding material ring arises. The shafts are arranged at mutually opposite locations. The protection of this additional patent therefore extends exclusively to those grinding devices that are designed in accordance with the main patent. In the drawing, the grinding device according to this invention is illustrated using an exemplary embodiment. 1 shows an axial section through the device and FIG. 2 shows a plan view of the lower half of the drum with the upper part lifted off. The drum body 1 is firmly connected to the vertically mounted and driven shaft 2. It is rotated so rapidly by this shaft that a grinding material ring continuously revolving with it is formed on its circumference. The stationary feed pipe 3, to which the ground material is fed from a feed hopper 7 via a horizontal conveyor belt 8, protrudes into the drum from above. The circular disk-shaped baffles 4, 4 'are attached to the pipe 3 at locations opposite one another. The ground material is discharged through the pipes 6, 6 'going out of the upper part of the drum space, either by suction, with fresh air flowing in through the pipe 5 opening into the feed pipe 3, or with the help of pressurized gas that is passed through the pipe 5 is introduced into the drum 1. -Patent claims: 1. Device for grinding hard, lumpy material, in particular coke, with a closed, constantly containing a certain amount of material to be ground without grinding media, rotating at a high speed causing the formation of a permanent grinding material ring on its inner circumferential surface, in which at least one at a distance of the inner circumferential surface running transversely to the direction of movement of the grinding material ring, the thickness of which is provided, which determines the thickness of the fixed wall, which holds back parts of the ground material and thereby causes a frictional effect between these parts and the grinding material ring, and from which the ground material is discharged by an air stream, characterized in that, that in a device of this type, in which, according to patent application St 8128 III / 50c, the wall extending between the end faces of the drum is directed towards the drum circumference so that a substantially stationary accumulation of grist is formed in front of it, and in the case of the drum rotating direction in front of the Storage wall no Internals are provided which prevent the formation of an exposed rear surface of the accumulation in the outer area, the grinding drum (1) revolves around a vertical axis (2) . 2. Apparatus according to claim 1, characterized in that the fixed feed hopper (3) for the material to be ground axially opens into the drum (1) and carries the retaining wall or the retaining walls (4, 4 ') on its outer circumference. Considered publications:
German Patent Nos. 591 782, 37 817;
U.S. Patent No. 2,592,994. 1 sheet of drawings © 909 577/240 7.59