SU688245A1 - Centrifugal classifier - Google Patents

Description

one

This invention relates to the field of mineral processing.

A centrifugal screen comprising a conical rotor rotating around a horizontal axis, the working surface of which is formed of tensioned strings, and a screw feeder 1J are known.

The disadvantages of this screen are the lack of cleaning of the working screening surface and the great complexity of string replacement.

A centrifugal classifier is known, including a conical rotor, a subsurface surface, a loading chute, screening surface cleaners, an annular conveyor for unloading the undersize product, and a device for unloading the overlap product made in the form of two spiral channels 2J.

The disadvantage of this classifier is that the presence of two spiral grooves for the undersize product causes this product to be divided into two diametrically opposed flows and the need to combine them during transmission to one technological mechanism and, in addition, increases the size of the classifier in height.

The aim of the invention is to reduce the size, simplify the design and ease of use.

 achieved by adapting

for unloading the oversize product is made in the form of an annular conveyor arranged parallel to the annular conveyor for unloading the undersize product and rigidly connected with it, and

Both conveyors are fixed material pullers.

FIG. 1 shows a centrifugal classifier; in fig. 2 - the same, top view. Centrifugal Classifier includes

body 1 with a lid 2, loading chute 3, a conical rotor 4 mounted on a shaft 5 connected by a bevel gear drive 6 with a drive 7. A screening surface 8 is fixed on the rotor 4 on

loading chute 3 - cleaners of the screening surface 9. In the space between the housing 1 and the lid 2, an annular conveyor 10 is mounted for the top product with a material stripper 11 and a discharge chute 12, and for the bottom product an annular conveyor 13 is installed with a material stripper 14 and the discharge chute 15.

The conveyors are rigidly connected by themselves with the uprights 16. The conveyors 10 and 13 are driven through the cable gear 17 from the drive box 18.

Centrifugal classifier works well.

The rotor 4 of the classifier is rotated from the electric drive through the drive 7, the bevel gear 6 and the shaft 5. The ring conveyor 13 is driven from the independent motor through the pulley 18 and the cable 17 and transmits the rotation to the conveyor 10 through the racks 16. The source material is continuously fed through the loading chute 3 on the bottom of the rotating rotor 4, and under the action of centrifugal forces, it peremp1, by sieving 1, its surface 8 to the upper discharge part of the rotor. The material, smaller than the established separation size, passes through the screening surface, onto the conveyor ring conveyor 13, and with the puller 14 unloads through the chute 15 onto the transport devices. The material larger than the size of the openings of the screening surface is discharged through the upper part of the rotor 4 to the rotating ring conveyor 10 and the puller 11 through the chute 12 is unloaded onto the transport device. The resulting separation products are in process value. The hard grains of the material to be separated, (faded to the size of the boundary grain separation) stuck in the holes of the screening surface, are removed from it by the cleaners 9.

Such a centrifugal classifier allows to reduce the size and reduce the weight of the classifier.

Claims (1)

1. USSR author's certificate No. 118694, cl. B 07B, 1/08, 1958. 2 USSR author's certificate 375107, cl. B 07B 1/08, 1969. / 7