SU724196A1 - Apparatus for concentrating weakly magnetic ores - Google Patents

Description

one

The invention relates to the field of beneficiation of minerals, namely, the design of devices for the beneficiation of weakly magnetic ores, such as ilmenite and rutile.

The closest in design features to the invention is a device for beneficiation of low-magnetic ores, including a trough made of non-magnetic material with a drain threshold, inside which a rotatable ribbon spiral auger is installed to remove separation products and electromagnets attached under the trough 1.

A disadvantage of this device is the low enrichment efficiency of low-magnetic ores, due to the insufficient magnetic field strength in the working zone of the magnetic separator, not exceeding 600-800 Oe, and the formation of flocs that impede the process.

The purpose of the invention is to increase the efficiency and quality of enrichment by increasing the intensity of the magnetic field and the destruction of flocs.

For this c. The proposed device for beneficiation of weakly magnetic ores, including a trough made of non-magnetic material with a drain threshold, inside which a rotatable

tape spiral shchenk for removal of separation products, and electromagnets, mounted under the trough, in the body of the tape spirals of the screw are mounted ferromagnetic rods installed along the trough.

FIG. 1 shows the proposed device for beneficiation of weakly magnetic ores; in fig. 2 - auger screw,

the body of which is mounted ferromagnetic rods; in fig. 3 shows section A-A in FIG. 2

The proposed device comprises a trough 1 made of a non-magnetic material with a drain threshold 2, inside of which a rotatable ribbon spiral auger 3 of a non-magnetic material is installed to remove separation products, and electromagnets 4 fixed under the trough 1.

Tape dorsal cheek 3 has ferromagnetic rods 5, mounted in the body of its helical spirals, and is driven in rotation by the drive 6. The angle of inclination of the non-magnetic trough 1 is adjustable

by means of a lifting mechanism 7, and for

washout material from the top of the screw 3

through the squirting 8 water is supplied.

A device for beneficiation of weakly magnetic ores works as follows

The enrichment material in the form of pulp is fed to the trough 1.

When the screw 3 rotates, the magnetic particles are captured by the ferromagnetic rods 5, transferred to the bottom of the trough 1 and transported by the screw 3 to the discharge opening of the trough 1.

Waste rock is non-magnetic, has a smaller specific gravity as compared with magnetic particles, therefore it easily rises and goes into the drain, discharged through threshold 2.

The enrichment material is cleared simultaneously by the same ferromagnetic rods 5 when rotating the screw 3, when alternating magnetization and demagnetization cause the grinding of magnetic particles in the device trough 1, contributing to the destruction of the floccules.

By increasing the intensity of the magnetic field to 5,000 Oe and the destruction of the floccules, the efficiency and quality of the enrichment is increased.

Thus, for example, when enriching chromite ores on the described device, compared with a ball filter separator SE-226, a chromite concentrate was obtained, in which the content of chromite increased by 4.5% and the recovery by 27%.

Claims (1)

Invention Formula A device for beneficiation of weakly magnetic ores, including a trough made of non-magnetic material with a drain threshold, inside which a rotatable ribbon spiral auger is installed for removing the separation products, and electromagnets attached under the trough, in order to increase the efficiency and quality of the enrichment increasing the magnetic field strength and destruction of flocs, ferromagnetic rods mounted parallel to the trough are mounted into the body of the auger ribbon spirals. Sources of information taken into account during the examination 1. V. Derkach, et al. Electromagnetic enrichment processes. M., Metallurgizdat, 1947, p. 88-90 (prototype).