SU1044332A1 - Apparatus for automatic control of magnetic separation process - Google Patents

Abstract

DEVICE FOR AUTOMATIC, WHICH REGULATION OF THE PROCESS OF MAGNETIC SEPARATION, containing series-connected magnetic iron sensor in the intermediate product, regul. | Torus and actuator of additional water consumption and series-connected magnetic iron sensor in the tails, adjusting the magnetic field strength and actuator of the magnetic system, characterized in that, in order to improve the accuracy of controlling the magnetic separation process, it is equipped with an influence compensation unit magnetic iron in the tails and a compensation unit for the influence of magnetic iron in the intermediate product, the input of the latter being connected to the additional water flow rate controller, and the output to the second and the input of a magnetic field strength regulator, the output of which is connected through a magnetic impact compensation unit: in the tails with the second input of the additional water flow regulator.

Description

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M

00 The invention relates to the enrichment of minerals and can be used at the beneficiation plants of the steel industry. A device for controlling a magnetic drum separator is known, having a magnetic system elevator located inside the drum. By varying the distance from the drum surface to the poles of the magnets of the magnetic system, regulation of the magnetic field strength in the particle separation zone and, consequently, the amount of the magnetic factory in the middling to the tails, is achieved. At the same time, G13 "However, this device has low accuracy. A device for automatic control of the magnetic separation process, -containing successively connected, is known: a magnetic iron sensor in the intermediate product, a regulator and an actuator for the flow of additional water, as well as a series-connected sensor, a magnesium iron in the tails, a regulator for magnetic magnetic floor and actuator of the Hz magnetic system j. A disadvantage of the known device is that the absence of a link between the regulator of the supply of additional water to the classifier and the regulator of tension of the field of the magnet HOSO of the separator causes the 5TO circuit containing the regulator of the supply of additional water to the classifier a circuit containing a voltage regulator, a floor, a magnetic separator. For example, when the content of the magnetic fraction in the middling decreases, the regulator of the supply of additional water to the classifier increases its consumption, which leads to an increase in the content of the magnetic fraction in both the industrial production and the tails. Reacting to an increase in the magnetic fraction content in the tails, the field intensity regulator of the magnetic separator reduces it and this leads to a decrease in the content of the magnetic fraction in the tails, and in the intermediate product. Thus, each regulator simultaneously acts on the content of the magnetic fraction in both products, which in the known automatic control device is equivalent to the introduction of positive feedbacks which worsen the stabilization of the content and reduce the extraction of the magnetic fraction in the industrial product and ultimately the control accuracy. The purpose of the invention is to improve the accuracy of regulating the process of mag, nitric separation. The goal is achieved by the fact that a device for automatic control of the magnetic separation process, comprising: a successively connected magnetic iron sensor in the intermediate product, an additional water flow controller and actuator and a magnetic iron sensor in series in the tails, a magnetic field strength regulator and an actuator of the magnetic system, equipped with a compensation block for the influence of magnetic iron in the tails and a block for the influence of magnetic iron in the The product, the input of the latter is connected to the additional water flow regulator, and the output is connected to the second input of the magnetic field intensity regulator, the output of which is connected through the magnetic iron influence compensation unit in the tails with the second input of the flow regulator to ( Additional water. The drawing shows a block diagram of the device. The device contains a sensor 1 of the magnetic fraction in the intermediate product connected to the input of the controller 2 for the flow of additional water, the output of which is connected to the actuator 3 of the water flow installed in the pipeline for supplying additional water to the classifier, the input product of which is the discharge of a ball mill. The output of the regulator 2 is also connected to the input of the block 4 for the compensation of the influence of magnetic iron in the computer, which uses a micro computer. The output of block 4 is connected to the input of the reg. Torus 5 of the magnetic field. To the output of the controller 5 an actuator 6 of the magnetic system of the separator is connected. The output of sensor 7 of the content of the magnetic fraction in the tails is connected to the input of the controller 5, to the output of which is connected a block 8 for compensating the influence of magnetic iron in the tails, for which the microelectric is used. The output of block 8 is connected to the input of controller 2. The device operates as follows. When the content of the magnetic fraction in the intermediate product deviates from the target value (for example, down), measured by sensor 1 of the magnetic fraction content in the intermediate product, regulator 2 turns on actuating mechanism 3 so that the water supply increases. classifier and as a result, the density of its discharge has decreased. As a result of a decrease in the discharge density of the classifier, the hydrodynamic resistance forces increase.

the movement of magnetic particles in the separator bath, which leads to the extraction of only the most magnetic particles and, consequently, to an increase in the content of the magnetic fraction in the intermediate product to a predetermined level.

At the same time, due to the natural connections between the contents of the magnetic fraction in the middling of willow tails with the classifier discharge density, a decrease in the latter leads to an increase in losses of the magnetic fraction in the tails.

The signal of an increase in the magnetic fraction content in the tails, measured by sensor 7, is applied to the input of the controller 5, which acts on the actuator 6 so that the field strength of the magnetic separator increases to the level at which the loss of the magnetic fraction in the tails reaches the permissible value.

At the same time, an increase in the intensity of the magnetic separator field leads to a decrease in the magnetic content (fraction in the intermediate product, as the magnetic forces acting on the particles increase.

To ensure independence in controlling the contents of the magnetic fraction in the intermediate product and in the tails, the compensation blocks 4 and 8 compensate for the effect of the magnetic fraction in the tails and compensate for the influence of the magnetic fraction in the intermediate product according to the algorithm

/ 2.% 1,% .2 d ,, ,,. V «02 2 P2% 2VP2 /;

From here

 (2,

21 hp

due to the symmetry of the scheme

l-, and

GZ)

2 4V

P2

de Wp,) transfer functions of the controllers 2 and 5; % 1% 2 transfer functions of the magnetic separator by channels; water consumption into the classifier is the content of the magnetic tail coat. in the intermediate product, the intensity of the magnetic field of the separator - the content / magnetic fraction in the tails, respectively;

L, j., I, .- transfer functions,. corresponding natural connections

. the balance equation between the content of the magnetic fraction in the middling and tails; functions

 blocks 4 and 8 compensation;

W., (- transfer function of sensors% 1 and 7 of the Magnetic fraction content in the middling and tails.

The use of the invention makes it possible to stabilize the content of magnetic iron in the intermediate product and to increase its extraction.

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Claims (1)

. DEVICE FOR AUTOMATIC REGULATION OF THE MAGNETIC SEPARATION PROCESS, containing a series-connected magnetic iron sensor in the intermediate product, a regulator and an actuator * for the consumption of additional water and series-connected magnetic iron sensor in the tails, a magnetic field strength regulator and an actuator of the magnetic system, characterized in that, in order to increase the accuracy of regulation of the magnetic separation process, it is equipped with a compensation unit for the influence of magnetic iron in the tails a compensation block for the effect of magnetic iron in the intermediate product, while the input of the latter is connected to an additional water flow regulator, and the output is connected to a second input of the magnetic field strength regulator S, the output of which is connected through the compensation block for the influence of magnetic Deleuze in the tails with the second input of the flow controller additional [[G * ¹³ additional water. I'fess ”