SU1514397A1 - Tumbling barrel - Google Patents

Description

The invention relates to a device for grinding materials, and more specifically to drum-type mills. The purpose of the invention is to increase the durability and reduce the complexity of manufacturing drum2

Noah mill. The drum mill includes a drum 1 mounted on bearing supports 2 mounted on a foundation. The drum has a loading 3 and drain 4 pipes. The unloading device is made in the form of an annular gutter 5 installed on the foundation, which encloses the drain nipple 4, and the classifying elements are installed in the lower part of the gutter end wall, while the scraper 8, which fits into the annular gutter, is fixed on the end face of the gutter, and window II located above the level of classifying elements. 3 hp ff, 3 ill.

£

1514397

four

The invention relates to devices for

grinding materials, and more precisely to the drum-type mills.

The purpose of the invention increase durability and reduce the complexity of manufacturing a drum mill.

FIG. 1 schematically shows a mill, general view; in fig. 2 view A in FIG. one; in fig. 3 section B B in FIG. 1 (arrow and shows the direction of rotation of the drum).

Drum mill includes drum

1 mounted on bearing supports

2, fixed on the foundation. The drum 1 contains the boot 3 and drain 4 nozzles. An annular chute 5 of the discharge device is installed on the foundation, the classification grid 6 of which is fixed on the end wall 7 of the chute 5. The latter covers the drain nipple 4, on the end of which is a scraper 8. The scraper 8 has dimensions corresponding to the cross section of the chute 5. The scraper 8 preferably The variant is made of elastic material, for example rubberized tape. In the scraper 8, holes 9 are made 9. The bottom of the chute 5 is internally covered with an elastic material, for example rubber 10. In the side surface of the chute 5, in the direction of rotation, a window 11 is made to release scrap and coarse fraction to the conveyor 12. To receive the finished product under the grating grille 6 A tray 13 is installed in the foundation. For loading the material into the mill, there is a bunker 14 installed in front of the loading nozzle

3, For the water supply to the mill is a rough 15.

Drum mill works as follows.

The source material, such as ore, is fed into the hopper 14, and from it into the inlet nozzle 3. When the drum 1 rotates, the material is fed into the drum with screw ribs of the nozzle 3. Inside the drum 1, the material is mixed with grinding bodies, which, when rotated, crush it, and water, fed into the mill, washes the finished product, which through the drain pipe 4 in the form of pulp is poured into the chute 5. Together with the pulp, the scrap — fragments of grinding bodies — enters the chute 5 as well.

the flat ore particles that have passed through the grating grating inside the drum 1. The pulp, entering the groove 5, passes through the holes of the grating grating 6 and flows into the tray 13, from where it is fed to the enrichment. Scrap, caught in the chute 5, is lowered to the bottom and with the help of a scraper 8 during the rotation of the drum 1 is brought to the window 11, and through it is thrown onto the conveyor 12, which transports the scrap for regrinding. The pulp captured by the scraper 8 flows through the holes 9. The upper part of the casing 5 serves to enclose the scraper 8 in the non-working zone, i.e. above the level of the pulp in the groove 5. In the case of a large fraction sticking to the scraper 8 in the upper part by centrifugal action forces where it will be held by the casing 5.

The proposed implementation of the drum mill allows to reduce the flywheel mass of the mill, in addition, decreases the wear of the grating.

Claims (4)

Claim 1. Drum mill, including a drum mounted with the possibility of rotation on bearing supports with loading and drain connections, an unloading device with classifying elements, characterized in that, in order to increase durability and reduce the labor intensity of manufacture, the unloading device is made in the form of an annular groove mounted on the foundation covering the drain pipe, and the classifying elements are installed in the lower part of the end wall of the gutter, while at the end of the drain pipe fixed with crab, which is included in the annular gutter, and in the side of the gutter there is a window located above the level of the classifying elements. 2. Mill in π. 1, characterized in that the inner surface of the shell of the gutter is covered with an elastic material, such as rubber. 3. Mill for and. 1, characterized in that the scraper is made of elastic material, for example rubberized tape. 4. Mill on Mon. 1 and 3, characterized in that the scraper holes are made. 1514397 Type A FIG. 2 bb