RU2437720C1 - Loose material grinder - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to ultra disperse grinding of multicomponent loose materials. Proposed device comprises two grinding tapered disks fitted to revolve in opposition of stationary base provided with channel to feed material into grinding zone, and annular casing to confine ground product intake chamber. Said intake chamber communicates with draft generator. Stationary support on the side of another grinding tapered disk is provided with additional channels to feed other materials into grinding zone.

EFFECT: no dust ejection into ambient air without sealing said grinder.

2 dwg

Description

The invention relates to the field of ultrafine grinding of multicomponent bulk materials.

The most effective devices for ultrafine grinding of bulk materials are those that combine the process of feeding and grinding multicomponent raw materials with the simultaneous calibration of the finished product for a given size, resulting in a finished product with a high degree of uniformity. The working area (active grinding area), as a rule, is formed by counter-rotation disks having shock elements. In such devices, all three processes of grinding the feedstock are realized: collisions of particles with each other and with structural elements, abrasion of particles with each other and with the surfaces of structural elements of the active grinding zone and particle cutting with elements of this structure.

Based on the foregoing, the closest to the proposed device is a device for grinding bulk materials, described in RF Patent No. 2397021, containing two grinding cone-shaped disks mounted with the possibility of counter rotation on a fixed support having a channel for supplying material to the zone from the side of one grinding cone-shaped disk grinding and an annular housing limiting the receiving cavity for the crushed product.

A disadvantage of the known device is the need to seal the grinding device together with the actuators in order to create equal pressure both inside and outside the grinding disks to prevent dusting of the finished product through the annular gap between the grinding coils and the receiving hoop, there is insufficient efficiency due to the possibility of dust deposition on drive surfaces and bearing assemblies. The known device has low efficiency, because does not allow to feed the mixed components directly into the grinding zone.

The technical result to which the invention is directed is as follows: elimination of dust emission into the environment without sealing the grinding device (partial exit of the finished pulverized product in the gap between the rotating disks and the annular body, limiting the receiving cavity for the crushed product by creating traction in the annular case, and providing the possibility of simultaneous grinding, mixing and distribution of additives throughout the mass of the ground product.

This result is achieved by the fact that in a device for grinding bulk materials containing two grinding cone-shaped disks mounted with the possibility of counter rotation on a fixed support having, on the side of one grinding cone-shaped disc, a channel for supplying material to the grinding zone and an annular housing limiting the receiving cavity for the crushed the product, the receiving cavity for the crushed product is in communication with the device for creating traction, and the stationary support from the other grinding cone braznogo disc provided with additional channels for feeding into the grinding zone other materials.

The invention is illustrated by drawings.

Figure 1 shows a longitudinal section of a device; figure 2 schematically shows the movement of the finished product.

The device for grinding bulk materials contains a fixed support 1, having a feed channel 2 and channels 3 for simultaneously supplying other components, an annular housing 4, limiting the receiving cavity 5 for the crushed product, counter-rotating conical disks 6, forming a dynamic calibration gap 7.

The feedstock is supplied to grinding zone 8 through channel 2, the exit from which is possible only through a dynamic gap 7 between the disks 6. Due to the size of the gap between the disks, the particle size is not larger than the size of the calibration gap, and the quality (grinding fineness) of the finished product is determined. For grinding raw materials and simultaneous grinding and mixing of additives, a feed is provided from the side of one cone, and additives for the final product are supplied from the side of the other cone. Channel 3 is configured to overlap.

To remove the finished product from the receiving cavity 5 and transporting the entire volume of the ground product to the receiving tank, a ring-shaped housing of a special shape is used, paired with a device (fan, compressor, blowers, etc.) that creates traction, excluding dust emissions into the environment.

Claims (1)

A device for grinding bulk materials containing two grinding cone-shaped disks mounted with the possibility of counter rotation on a fixed support having, on the side of one grinding cone-shaped disc, a channel for supplying material to the grinding zone and an annular housing limiting the receiving cavity for the crushed product, characterized in that the receiving the cavity for the crushed product is communicated with a device for creating traction, and a fixed support from the side of another grinding conical disk nena with additional channels for feeding other materials into the grinding zone.

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