SU980836A1 - Method of controlling iron ore wet magnetic concentration section - Google Patents

Description

one

The invention relates to the beneficiation of minerals, in particular, to the automation of the enrichment processes of iron ores.

There is a method of controlling the magnetic separation process, which includes measuring the density of the pulp in a magnetic separator and the magnetic permeability of the enrichment products, receiving signals from the respective sensors proportional to the values of the density of the pulp and the magnetic permeability of the enrichment products, processing the signals in an oscillator, the output of which connected to a current regulator in the winding of an electromagnet of a magnetic separator.

The disadvantage of this method is that the efficiency of the magnetic separating process is low due to the lack of consideration of the influence of the properties of the original ore on the quality of the separation products.

The closest to the invention in terms of its essence and the effect achieved is a method for controlling the wet wet enrichment of iron ore, including measuring the performance of sections of the original ore, stabilizing the mill fill, stabilizing the density of the mill, adjusting the density of the pulp in the magnetic separator bath, stabilizing the content iron tails, ig. measuring the deviation of the iron content in the concentrate from a predetermined value; obtaining 10 signals, proportional to the volicines of the indicated deviations, o6pa6aiv. , signals in a computer, the output of which is connected to the automatic control system C 23.

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The disadvantage of this method is the low efficiency of the control process, due to the lack of accounting for

20 nor the properties of the original ore on the quality of the separation products.

Claims (2)

The purpose of the invention is to increase the efficiency of the separation process by pe3 9 & beating density classifier drain. This goal is achieved by coiing the method of controlling the wet magnetic enrichment section of iron ores, including measuring the performance of sections of original ore, stabilizing the mill fill, stabilizing the density of the mill, adjusting the density of the pulp in the magnetic separator bath, stabilizing the iron content in the tails, measuring deviations of the iron content in the concentrate from a predetermined value, receiving signals proportional to the magnitudes of the indicated deviations, device, the output of which is connected to the automatic adjustment system, additionally and & measures the deviation of the output of the section from the initial ore from the specified value, the deviation of the iron content in the original ore and the deviation of +20 mm class in the original ore, and the output signal of the counting device serves To the input of the automatic system for regulating the density of the drain of the classifier, the Signals processing in the calculating device is carried out according to the following algorithm: Ap (i; F-dQCt) + G.-fl (((t; + H- / 3(-t)-V.o6(i), where up (t) is the change in the density of the classifier drain; dO (t) is the deviation of the section performance by initial ore; AK (t) - deviation of grade +20 mm in the original ore d (5 (t) - deviation of concentration of iron concentrate in; Lot (t) - deviation of the same content in the source material t - current time; F, G, HnY - proportionality coefficients. The drawing contains the scheme of the method implementation. The scheme contains the mill 1, the classifier 2, the pulpit divider 3, the magnetic separator 4, the sensor 5, the measuring deflection of the sections for the source ore, sensor 6, measuring the deviation of the grade of +2 O mm in the source ore, sensor 7, measuring the deviation of the iron content in the original ore, sensor 8, measuring the filling of the mill, sensor 9, measuring the density 4 pulses on the discharge of the classifier, sensor 0, measuring the deviation of the content of iron in the concentrate, sensor 11, measuring the iron content in the tails, automatic system 12 regulating the mill filling, automatic control system 13 for the density of the mill, automatic system 14 regulating pulp density, and the discharge of the classifier, automatic stabilization system 15 for the content of magnetic separator waste, mechanism 16 changes the speed of the movement, feeds the source ore to the mill, mechanism 17 for changing the flow rate of the mill in the mill, the counter-operating device 18. The method of controlling the wet magnetic enrichment section is as follows. With the help of sensors 6 and 7, the deviation of the iron content in the original ore and the deviation of the grade with a grain size of +20 mm from the target are recorded, and with the help of sensors 5 and 10, the output deviation and the deviation of the iron content in the concentrate from the target is recorded. The signals generated by the sensors 5, 6, 7 and 10 are fed to the input of the calculating device 18, where they are processed according to the algorithm (1), and the signal received at the output of the device 18 is fed to the input of the automatic system 14 for controlling the density of the slurry at the sink. classifier, which changes the density of the classifier discharge by a value. A change in the density of the pulp at the discharge of the classifier allows the separation process to be performed with optimal technological parameters in the mask, while increasing the density of the pulp at the drain sifikatora accompanied by a decrease in particle size falling within the drain, increasing load on the windmill, decrease in the performance of sections of the original ore, the increase in the iron content in the concentrate. Regulation of the classifier drainage density allows controlling the technological process of the magnetic enrichment sections, which allows increasing the iron content in the concentrate by 0%, increasing the section productivity by 1.5% and, consequently, increasing the efficiency of the control process. 598 Claims of the Invention A control unit for a wet magnetic enrichment section of iron ores, including measuring the output of sections on the original ore, stabilizing the mill filling, stabilizing the density mode of the mill, adjusting the density of the pulp in the magnetic separator bath, stabilizing the iron content in the tails, measuring from concentrate from a given value, receiving signals, nponoi rational values of the indicated deviations, signal processing in the counting device, The output of which is connected to an automatic control system, characterized in that, in order to increase the efficiency of control processes by registering the classifier drainage, the deviation of the section output by the original ore from the target value is additionally measured, the content of the class is +2 O mm in the original ore, and the output signal of the calculating device is fed to the input of the automatic system for regulating the density of the discharge of the class of the identifier, while the signal processing 6 in the computer They are implemented according to the following algorithm: flQ (thedK ((i (tMraot (t), where qty (t is the deviation of the output of the section for the source ore; LK (i J is the deviation of grade + 2O mm in the source ore; ufbCt is the deviation of the iron content in the concentrate; Aot (t) is the deviation of the iron content in the source material; t is the current R.L.IiZ - proportionality coefficients. Information sources taken into account in the examination 1. Khan A. A. Automating the process of enrichment. M., Nedra, 1964, p. 33840. 2. Mariuta, A.N., et al. The system of automatic control of the iron ore supply section. Izv.vuzov, Mining Urn, No. 3, 1975, p. 129-132 (about aipti). Waste  g 5 -l 5 6 7 8 W 12Scht1% P S 5 3 W 11 12 lull -6 KBHi4 Hmf) am Kommt