SU784948A1 - Disintegrating sieve - Google Patents

Description

(54) GRINDER

one

The invention relates to devices for the separation of bulk materials into size classes. And can be used for small flows in the mining and metallurgical, construction and tool industries.,

Known rumble, including a box with a vibrator and transverse cylindrical grates, pins which are freely mounted in the deaf sides of the box. When the box vibrates, the grates receive a run-in in the nests of the boards and, having oscillations out-of-phase with the duct with a certain amplitude, exclude the clogging of the grates 1 with ore.

The screen is designed for large and medium screening and is not capable of regrinding individual fractions of screened materials.

A grate screen is known, including a vibration-controlled box, sifting surfaces and grate freely mounted by its pins in the bushes of the sides of the box 2.

The screen is designed for large screening of hard ores, not suitable for fine wet screening and for

Aggregation of the oversize fractions of the ore being processed.

The aim of the invention is to increase the efficiency of screening by combining screening and de-grinding operations.

The goal is achieved by the fact that the screening box is provided with distribution tanks, which are located at the exit point of the grid bars.

FIG. 1 - section bb FIG. 2; in fig. 2 - section A-A of FIG. 1. 10shredder includes box 1

with unbalance drive 2 and sides 3, fitted with sleeves 4, in which the grate 5 are freely installed with their trunnions. On the box, above the grate, there is a sieve 6, and the discharge bar 7 is fixed under the grate. distribution tanks 8 into which the oversize fractions are directed by estrus 9. The box is installed on the foundation through elastic elements 10.

The device works as follows .-

The material is loaded onto the plane of the sieve 6 and is divided into two streams: oversize, which is sent by leak 9 in tank 8 and undersize, coming out of the screen through tray 7. The containers 8 evenly distribute large fractions of the oversize product through the sleeves 4 of the sides 3 where it is crushed by the trunnion trunnion axles 5 rolled around to the fractions of the undersize product and discharged into the tray 7, averaged with the undersize classes.

The amplitude of the screen, reaching 5 mm, and the considerable weight of the grates contribute to the creation of high specific pressures in the grinding chambers, sufficient to ensure a degree of crushing of at least 10.

In this case, the grate does not perform its direct functions, however, it gives the rumble two new useful properties: the ability to work simultaneously in the grinding mode, and the screening, as well as significantly increase the screening efficiency on the sieve. The imposition of the oscillation frequency of the drive on a higher frequency of self-oscillations of the grate when running around the layer of ore in the sleeves contributes to self-cleaning of the sieve. Grains, zab, willow cells, receive alternating accelerations when applying oscillations and free their cells, contributing to the increase in screening efficiency. At the same time, the Tlum formation during the operation of the device is reduced due to the ore layer on the surface of the running of the grate.

Claims (2)

1. Reference enrichment of ores, M., Nedra, 1972, vol. 1, p. 46. 2.Bendt Faderberg.Hew vibratihg screening engineering and mining journal, 1960, No. 7, p. 88-91. Phi2.2