SU1570779A1 - Method and apparatus for dehydration of finely ground ferromagnetic pulps - Google Patents

Abstract

The invention relates to magnetic dewatering and improves the efficiency of the dewatering process. The original pulp is fed to the inclined surface of the working body (ABM) and is acted upon by a running magnetic field (BMP) along the entire ABM. The direction of the BMP is set to coincide with the direction of movement of the pulp along the ABM. At the same time, they are affected by a thermal field created by a pulsed magnetic field in the drying zone. The pulp is fed to the missile defense system at the boundary of the thickening and drying zones. The angle of inclination of the PRO in the thickening zone is set smaller than the angle of inclination of the PRO in the drying zone. The method is carried out by a device containing a working body in the form of a box / K / 1 of a non-magnetic material, mounted at an angle to the horizon with the formation of thickening zones 2 and drying 3. The section K 1 in the thickening zone 2 has a slope angle to the horizontal less than the slope angle To 1 in the drying zone. The magnetic system 4 is installed under K 1. The BMP source is installed parallel to it and the source of a pulsed magnetic field is installed in the drying zone. In the end part K 1 in zone 2 of the condensation, there is a drain threshold 7, and below it is a sump 9. The dehydrated product enters the receiver 8. The pulp is fed into K 1 at the boundary of the condensation 2 and drying zones 3. The pulp falls into the zone 2 of condensation, where sedimentation of ferromagnetic particles occurs and they move upwards along K 1 under the action of a BMP. Water is removed through the overflow threshold 7. As the particles move in the drying zone 3 under the action of the BMP. Water is removed through the drain threshold 7. When particles move in the drying zone 3 under the action of a pulsed magnetic field, additional material is dried, which then enters the receptacle 8. 2 sec. f-ly, 2 ill.

Description

BMP and in the drying zone - the source of a pulsed magnetic field. In the end part K 1 in zone 2 of the condensation there is a drain threshold 7, and under it is a sump 9. The dehydrated product enters the receiver 8. The pulp is fed into K 1 at the boundary of the zones of thickening 2 and drying 3. The pulp falls into the zone 2 of condensation, where precipitation occurs

of ferromagnetic particles and their movement upwards along K 1 under the action of the BMP, Water is removed through the threshold

7. When moving particles in the drying zone 3 under the action of a pulsed magnetic field, an additional drying of the material occurs, which then enters the receiver 8. 2 cp F-crystals,

2 Il.

The invention relates to magnetic enrichment and dehydration and can be applied in the mining industry of the national economy.

The purpose of the invention is to increase the efficiency of the dewatering process.

FIG. J shows a device for carrying out the proposed method, a general view; in FIG. 2 - electrically goals of currents creating a traveling and pulsed magnetic field.

The device includes a working body in the form of a duct 1 of non-magnetic material, mounted at an angle to the horizon with the formation of thickening zones 2 and drying 3, with the duct section in the thickening zone being made with a slope angle to the horizon smaller than the slope angle of the duct in the drying zone, magnetic system 4, installed under the duct, including a source 5 of a traveling magnetic field and parallel to it an additional source 6 of a pulsed magnetic field, installed under the duct in the drying zone, a drain threshold J, installed in the end portion of the duct in e thickening, the receiver 8 and the dewatered product sump 9. The magnetic system 4 also comprises a filter 10 and highpass filter 11 pulses. Thanks to the high-pass filter 10, which does not allow an alternating current to be connected to the pulse current circuit, three-phase alternating current passes through all windings and thereby creates a traveling magnetic field under the entire bottom of the box.

With the passage of the current generated by the source 6 of a pulsed field, in the windings of the magnetic system located under the drying zone 3, a magnetic field of a pulsed current of high amplitude and duty cycle is created. For the rest of the windings, the pulse current does not pass due to the filter of 11 pulses connected to the three-phase alternating current circuit. As a high-pass filter, it is possible to use typical circuits, for example, typical RC-and LC-filter circuits, active filters, as a pulse filter - typical band-pass Filter circuits. Typical signal generator circuits, for example, based on Schmitt triggers, are used to generate a pulse current of large amplitude and low duty cycle.

The device works as follows.

Finely divided ferromagnetic pulp with a moisture content of 30-60% is fed into the duct 1 at the interface between the thickening and drying zones 3. In view of the fact that the angle of inclination to the horizontal of zone 3 is greater than the angle of inclination of zone 2, the pulp enters the zone 2 of thickening, where the deposition of ferromagnetic particles and moving them up the bottom of the box 1 opposite the direction of the running floor. Water is removed from the duct through drain threshold 7. When Ferromagnetic particles are moved upwards along the bottom of duct J in the drying zone 3, moisture is removed from the precipitate by its own action; strength of the tin down the bottom. In order to remove residual moisture in the dehydrated material, it is additionally affected in the drying zone by the magnetic field of a pulsed current of large amplitude and duty ratio created by connecting the source 6 and Filter 10 to the windings located under the drying zone 3. The dehydrated product enters the receiver 8.

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Claims (2)

Invention Formula one . The method of dehydration of TOHkona-minced Ferromagnetic pulps, including the supply of pulp to the inclined surface of the working body, the impact on the pulp by a running magnetic field, the direction of which is parallel to the direction of movement of the pulp through the working body, with the formation of zones of dehydration, differing from that, in order to increase the efficiency of the dewatering process, the angle of inclination of the surface of the working body in the thickening zone is set smaller than the angle of inclination of the surface of the working body in no drying, and the pulp fed to the working body on the boundary surface of the thickening and drying zones thus on the pulp in the drying zone a pulsed magnetic field, and the running direction of the magnetic field is set to coincide with the direction of movement of the pulp. thicken / fofa 0 7 , five 0 five 796. 2. A device for dewatering finely-divided Ferromagnetic pulps, including a working body inclined to the horizon with the formation of thickening and drying zones, a source of a traveling magnetic field located along the working body parallel to it, a receiver of the dehydrated product and a water collector, which is because in order to increase the efficiency of the dewatering process, the working body is made in the form of a duct, the source of the running magnetic field is installed under the duct, while the duct section in the thickening zone is made from coal The inclination to the horizon is smaller than the angle of inclination of the duct in the drying zone, and the device is made with a drain threshold set in the end face. to the duct box in the thickening zone, and an additional source of a pulsed magnetic field, installed under the duct in the drying zone. Zone 0 & C / o f # mote / ol