SU1532077A1 - Method of automatic control of magnetic concentration of ores - Google Patents

Abstract

This invention relates to the automatic monitoring and control of the processes of magnetic ore dressing in the ore-dressing industry. The purpose of the invention is to continuously monitor the efficiency of the magnetic enrichment process, regardless of the aging factors of the magnetic system of the separator with permanent magnets and the change of the magnetomobile force of the separator with an adjustable magnetic field. The layer of magnetic product on the separator's working body changes the induction of the magnetic field depending on the thickness of the layer. At the same time, two normal and tangential components of the magnetic induction vectors in the space between the inner surface of the working body and the surfaces of two pole tips located under the concentrate layer of different thickness in the initial and terminal parts of the formation of this layer are continuously measured simultaneously. By the difference of these signals, the efficiency of the enrichment process is judged, and by their particular, the efficiency of separation. Additionally, the iron content in the original ore is measured, other enrichment indicators are determined — extraction and yield of the concentrate. 1 il.

Description

ate

00

This invention relates to the automatic monitoring and control of the processes of magnetic ore dressing in the ore-dressing industry.

The aim of the invention is to continuously monitor the efficiency of the magnetic enrichment process, regardless of the aging factors of the magnetic system of the separator with permanent magnets and the change of the magnetomotive force of the separator with an adjustable magnetic field.

In the method of automatic control of the process of magnetic enrichment

The ores continuously measure the difference between two normal or tangential components of the magnetic induction vectors in the space between the inner surface of the separator and the surfaces of two pole tips located under the concentrate layer of different thickness in the initial and terminal parts of the formation of this layer, i.e. in the working zone and the zone of the tails, and by the difference of the two signals, the efficiency of the magnetic separation process is judged.

The drawing shows the system of automatic control of the process of magnetic enrichment of ores.

The drawing shows a bath 1 of a magnetic separator, a drum 2 of a magnetic separator, a magnetic system 3 of a separator, a layer A of enrichment products, sensors 5 and 6 of the Hall, amplifying conversion units 7 and 8, a computing device 9, an information display device 10, a sensor I1 iron content in the original ore. Letters are designated: And - a working zone of a separator; B - tails release zone; Ф |, 2 magnetic fluxes generated by pairs of pole tips, respectively, in the working zone and in zone B of tailing out; , V is the iron content in the enrichment products and tails, respectively; and, Q - electrical signals corresponding to the values and V; v is the iron content in the original ore; Q - volume performance; CO is the speed of rotation of the drum 2.

The method of automatic control of the process of magnetic enrichment of ores is implemented as follows.

Enriched product with a volumetric capacity Q at the inlet of the PBM-GTP / 250 separator enters the bath 1 of the magnetic separator. The nominal mode of operation of the separator is pre-set (the field strength on the surface of the poles is 96 kA / m, the rotation speed of the drum 2 is 1.2 m / s). Under the action of a magnetic field created by the magnetic system 3 on the surface of the drum 2, a layer of an enriched product is formed. The intensity and magnetic induction in working area A is determined by the magnetic flux P, and in the B tailing zone B - by the magnetic flux F .. The content of magnetic fractions in the enrichment product and tails determines the thickness and magnetic permeability of the layer in zones A and B and changes the magnetic conductivity in zones A and B, and consequently, the magnetic field strength or its magnetic induction, which is measured by Hall sensors 5 and 6, and in this case the normal component of the magnetic induction is measured. Signals from Hall sensors come through an amplifier-transform

5 0 5

o Q 5 Q

five

The devices 7 and 8 to the input of the computing device 9 connected with the display module 10. The signal and output from the device 7 judge the iron content in the enrichment product, and the signal U from the output of the device 8-0 iron content in the tails V. The difference between the signals U and Uj determines the efficiency of the process of enrichment E:

3o Ui-U2.

Computing device 9 calculates other indicators of enrichment, for example:

concentrate yield) f g--; and pv

p (X -V 1b

extraction: t;

K -V 00

ft

separation efficiency e -.

Output indicators for enrichment: ft, V, Ed, E., y, are displayed on the screen of the display module. The iron content in the original ore is measured by a sensor 11 of the type DKI-100.

I

The proposed method can be implemented on magnetic and electromagnetic separators.

Claims (1)

Invention Formula A method for automatically controlling the process of magnetic enrichment of ores, including measuring the magnitude of the intensity or induction of a magnetic field in the working zone of a separator, is required in order to continuously monitor the effectiveness of the magnetic enrichment process regardless of the aging factors of the magnetic system of the separator magnetism and changes in the ignition power of a separator with an adjustable magnetic field, continuously measuring the difference between two normal or tangential components of the vectors magnetic induction in the space between the inner surface of the working body of the separator and the surfaces of the two pole pieces. located under a layer of concentrate of various thicknesses in the initial and terminal portions of the formation of this layer, and judging by the difference of the two signals, the efficiency of the magnetic separation process is judged.