SU125463A1 - Drum Mill - Google Patents

Description

Drum mills with forcibly rotating grinding bodies are known.

In the described mill of the same type, the grinding intensity is increased.

This is achieved by the fact that it collectively uses: a rotating drum and working grinding bodies enclosed in it, which are made in the form of cam rotors rotating towards each other.

FIG. Figures 1 and 2 show the mill, sections in two mutually perpendicular vertical planes.

The drum 1, provided with hollow trunnions 2, mounted on roller bearings 3, is driven into rotation by an electric motor 4 through the brush 5 and the gear ring 6, which is attached to the flange of the drum.

The inner surface of the drum is lined with wear-resistant steel plates. The ends of the drum are closed with fixed walls 7 mounted on the foundation and provided with loading 8 and discharge 9 branch pipes. The joints of the fixed end walls with a rotating drum are sealed with a pneumatic seal 10. Inside the drum there are two or more rotors} 1, mounted in their sub-supports 12, which are resting on a non-attached support. Each rotor is driven by a separate electric motor 3. The rotors are massive rims. fortified on the shaft. The working parts of the rims, which are made in the form of protrusions, are lined with wear-resistant material. The mill is operated as follows.

The source material through the loading nozzle 8 enters the inside of the drum}) and the rotating rotors, which cast it onto the lining of the drum. Crushing occurs due to the impact of the rotors on the ore.

No. 125463

the blows of the discarded ore against the lining and the impact of the pieces between them. The material that has fallen into the rotor zone rises up the drum and is continuously fed to the rotors for additional crushing. When the rotors rotate, the crushed material is discarded towards the ore flow.

An air stream is blown through the nozzles through the nozzles, the speed of which is selected so that particles of a certain size are carried out of the crusher, as a result of which the material circulates inside the crusher until it is reduced to a predetermined size due to the air flow rate, after which it immediately evacuated by air from the mill.

The crushed product from the mill can enter either first into the through air separator, and then into the cyclone, or directly into the cyclones.

During the operation of the crusher, some individual pieces fly randomly in different directions, and in the absence of obstacles they can fly out of the drum through the loading or unloading nozzle.

To prevent this, both nozzles are made up of several bends, so that the pieces that have flown out of the hull are returned back along an inclined plane.

Bretepy Object

A drum mill with forced vrash, ayush, imis grinding bodies, characterized with the cumulative use of a rotating drum and the working grinding bodies imprisoned in it, made in the form of cam rotors rotating towards each other, in order to increase the grinding intensity.

Original

ateriap

t FIG .1

Fig