RU73476U1 - DEVICE FOR CONTROL AND OPTIMIZATION OF WORK OF MAGNETIC SEPARATION - Google Patents

Abstract

Appointment: equipment for mineral processing at mining and processing enterprises for the processing of ore minerals.

Use: mineral processing, in particular, ores of ferrous metals.

The purpose of the utility model is to optimize the operation of magnetic separation by monitoring the degree of load of individual magnetic separators in one operation by using data on the magnitude of the current, either the power consumption, or the power consumption, by the drive motors of the separators.

The essence of the utility model: a device for monitoring and optimizing the operation of magnetic separation consists of a primary device (sensor) for measuring the energy parameters of the electric motor, the rotating drum of the magnetic separator: current, or power consumption, or power consumption, secondary device (controller), computers, indicator. A variant of the device for the case of performing magnetic separation by a group of magnetic separators provides for the presence in the device of a group of primary devices (sensors) by the number of separators. In addition, in order to ensure uniform distribution of ore supply among separators operating in the group involved in the same operation, it contains a group of actuators, each of which controls the supply of ore supply to the corresponding magnetic separator, changing the degree of opening of the corresponding gate

(cork) pulp splitter.

The distribution of ore supply by concentrating units of one stage, operating in parallel, is carried out on the basis of the energy parameters of the operation of individual magnetic separators included in the group, while the distribution of ore supply among the devices (magnetic separators) is adjusted to minimize the difference in energy parameters between the devices.

1 n.a.s. formulas, 6 z.p. formulas, 1 ill.

In FIG. shown:

1 - magnetic separator;

2 - transporting drum;

3 - electric motor;

4 - primary device (sensor) - a meter of power, current strength or power consumption;

5 - secondary recording device (controller);

6 - computer (computer);

7 - indicator (for example, LED bar);

7 * - additional (exemplary) indicator

8 - gate (plug) of the pulp splitter;

9 - actuator;

10 - pulp splitter.

Description

The proposed technical solution relates to the field of mineral processing and can be used in ferrous metallurgy in processing plants that process iron ores.

The objectives of the proposed technical solution is

1) monitoring (reflection) of the load of the separator (s) with ore material;

2) monitoring the uniformity of the distribution of ore supply among the magnetic separators operating in the group involved in the implementation of the same operation (stage) of magnetic separation;

3) ensuring a uniform distribution of ore supply among separators.

For optimal operation of the magnetic separation operation, it is important to evenly distribute the ore supply to the individual devices (separators) in the separation front, powered in parallel.

The reason for the non-optimal operation of magnetic separation may be the uneven distribution of ore supply among the separators. In this case, the power load on one of the separators is less, and on

the other is bigger. The separator with increased load does not provide optimal output technological characteristics. This is due to the fact that the magnetic separator has a certain throughput [1].

The authors are not aware of the analogues of the proposed utility model. In practice, the distribution of ore supply to individual separators is done by manually adjusting the degree of opening of gates (plugs) on the slitter for each of the separators operating in the front. The degree of opening of gates (plugs) is assessed visually. In this case, in fact, there is an influence of mechanical factors - the accuracy of the manufacture of pulp dividers, a different degree of wear of gates (plugs), which additionally introduces asymmetry in the separation of ore supply flows into separators. Significant imbalance (uneven distribution of ore supply) is brought about by the availability of redundant (shut-down) separators. At the same time, the gate (plug) on the idle separator is in the closed state, and this violates the symmetry when the ore supply flows are divided into working separators. Thus, it is difficult to visually check the state of distribution of ore supply for separation between individual separators, therefore, the supply is not always evenly distributed.

One of the technical results of the proposed utility model is to obtain for the first time a means of monitoring and optimizing the operation of wet magnetic separation.

The goal of the proposed technical solution is achieved by measuring and evaluating the energy parameters of the magnetic separator motors.

This is achieved by the fact that when performing magnetic separation with one magnetic separator, the device contains a primary device (sensor) for measuring the energy parameters of the work (current strength, consumed electrical power, or power consumption) of the magnetic separator motor, and when performing magnetic separation, more than one separator, and a group of magnetic separators, to control the uniformity of the distribution of ore supply among the separators working in the group involved in the implementation of one and the same operation (stage) of magnetic separation, the device contains a group of primary devices (sensors) for measuring the energy parameters of the work (current strength, consumed electrical power, or power consumption) of each magnetic separator included in the group. In addition, to provide a visual representation of information about the load of separators, the device contains a group of indicators or a display. In addition, to ensure a more uniform distribution of ore supply among the separators, the device contains a group of actuators that regulate the supply of ore supply to the separators by changing the degree of opening of gates (plugs) on the slurry divider (for example, the type of electric drive of the valve at the inlet of the suction pump for pumping pulp).

In FIG. A device for monitoring and optimizing the operation of magnetic separation is presented in two versions: a) when performing magnetic separation with one magnetic separator, b) when performing magnetic separation with a group of magnetic separators.

A device for monitoring and optimizing the operation of magnetic separation includes a primary device (sensor) for measuring energy indicators (for example, a power meter, or a current meter, or a power consumption meter) 4 which is connected to an electric motor 3 that rotates the transporting drum 2 of the magnetic separator 1 , a secondary device (controller) 5, computer 6, indicator 7 or a display to reflect the load of the separator with ore material.

In addition, for the case when the magnetic separation operation is carried out not by one separator, but by a group of several separators fed with ore feed in parallel, a variant of the device is designed to ensure uniform distribution of ore supply among several separators operating in the group. The device according to the indicated embodiment includes, respectively, a group of primary devices (sensors) 4 connected to electric motors 3 of each magnetic separator 1 included in the group.

In addition, the device contains a group of indicators 7, each of which reflects the load of the corresponding magnetic separator, or contains a display that reflects the load of each magnetic separator included in the group.

In addition, to ensure a uniform distribution of ore supply among the separators operating in the group involved in the same operation, through the same load of each group separator, the device contains a group of actuators 9, each of which controls the supply of ore supply to the corresponding magnetic the separator 1 by changing the degree of opening of the gates (plugs) on the pulp splitter.

In addition, to simplify the adjustment of the degree of opening of gates (plugs) when manually adjusting the supply of ore supply among the separators working in the group involved in the same operation, the device contains an additional indicator. An additional indicator acts as a guideline for manual tuning and is intended to indicate the required level of the monitored parameter. An additional indicator displays the average load of magnetic separators with ore material.

In addition, to control the load of various stages of magnetic separation of ore material, each of which is carried out by a group of several separators, the device contains several groups of primary devices - according to the number of controlled stages of magnetic separation. Each of the groups of primary devices measures the energy parameters of magnetic separators of the corresponding stage of magnetic separation.

The device operates as follows:

The transport drum 2 is driven by an electric motor 3, the power consumption is measured by a power meter 4, for example, type E80, EM3, the signal of which is fed to a secondary recording device (controller) 5.

Upon receipt of ore supply to the magnetic separator 1, the magnetic product is removed to the surface of the drum 2, which transports the magnetic product to the discharge zone. The amount of recoverable magnetic product varies depending on the load on the separator for food, the efficiency of the separation process (ore quality, etc.). The thickness of the layer of this product on the surface of the transporting drum 2 depends on the amount of magnetic product being extracted. Depending on the thickness of the layer of the magnetic product, the energy parameters of the electric motor 3 change (for example, power consumption, current strength, or power consumption). The controlled energy parameter is measured by a primary device (for example, a power meter, or a current meter, or a power consumption meter) 4, the signal from which is transmitted to a secondary device 5 (for example, a controller) or to a computer (computer) 6. Indicator (for example, LED bar) 7, a group of indicators, if there are several separators, or the display reflects the load of the separator (s) with ore material.

The regulation of the supply of ore supply to the corresponding magnetic separator is carried out by the actuator 9 by changing the degree of opening of the gate (plug) 8 on the pulp splitter 10.

The secondary device 5 (for example, a controller) or in a computer (computer) 6 compares the load of each group separator with each other and, by the nature of the mismatch, issues a control command to the corresponding actuator 9, which regulates the supply of ore power to the magnetic separator 1, changing the degree of opening of the gate (plug) 8. At the same time, the quantity of ore supply is reduced for separators with higher energy indices, and the supply is increased for separators with lower energy indices. Redistribute food to minimize the difference in energy performance.

To simplify the adjustment of the degree of opening of gates (plugs) when manually adjusting the supply of ore supply among separators operating in the group involved in the same operation, the device contains an additional indicator as a sample to display the average load of magnetic separators with ore material. Manual adjustment of the position of the gates, (traffic jams) is carried out, focusing on the readings of an additional (exemplary) indicator.

Thus, the use of the proposed utility model allows you to control (reflect) the load of the separator (s) with ore material; control distribution uniformity

ore supply among magnetic separators operating in a group involved in the execution of the same operation (stage) of magnetic separation.

In addition, the device allows for a more uniform distribution of ore supply among the separators, which, in turn, allows you to optimize the work of magnetic separation.

The proposed utility model was implemented (tested) in production conditions at the Kostomuksha plant processing plant in three versions. The implementation of the proposed alternatives is the same except for the type of primary device.

For the implementation of the control system and the optimization of wet magnetic separation according to the first embodiment, an energy metering system was used, including electricity consumption meters, controllers that transmit data to a computer. The computer records the indicators of the electric meter with a cumulative total, with each indication associated with the point in time when these indicators are read.

Set the time period (time interval) for which the energy consumption is determined. Electricity consumption (increase) is defined as the difference between the meter readings at the end and at the beginning of a given time period. Power consumption measured over a given time period results in hourly consumption. To do this, the consumption is divided by the value of the time period (expressed in minutes) during which this energy consumption is obtained, and multiplied by 60. By

regression equations, the measured values are interpreted in the performance of the magnetic separator for the magnetic product in the controller, as well as on the computer, on the monitor of which the performance of the separators is displayed (performance for the magnetic product).

According to the second option, the consumed power, which is measured by a power meter, for example, of the EMZ type, is selected as the controlled energy parameter of the separator motor operation. The computer monitor reflects the load of separators with ore material. The bar charts illustrate the operation of magnetic separators: which of the separators is overloaded and which is underloaded. Thanks to these indications, the loads on the separators, powered from one pulp splitter, are equalized among themselves, redistributing the ore supply. In addition, according to the level of load of separators with ore material, it is judged that the operating mode of magnetic separation is at the optimum level. For example, an increased load of separators with ore material may indicate an abnormal operation of the separators themselves, their optimal operation, or an excessive load on the ore supply, after which, in order to optimize the process, it is necessary to adjust the controlled parameters of the separators (for example, the supply of additional water), or reduce ore nutrition load.

According to the third option, the operation of the separator motor is controlled by current (by current). The third version of the utility model is implemented by the same technical means as the second (using the universal module EM3 as the primary device).

The authors carried out measurements of the energy indicators of the magnetic separator electric motor at various levels of the workload of the ore supply line.

At zero load of the magnetic separator with ore material, the power consumption of the electric motor is 1.7 ÷ 1.9 kW.

Then, as the load on the ore separator increases, the load of the magnetic separator with ore material increases, which is accompanied by an increase in the power consumption of the electric motor.

Thus, the use of the proposed device for monitoring and optimizing the operation of magnetic separation can increase the efficiency of each magnetic separator in the separation front, eliminating the irrational overload and underload of the separators, leading to a decrease in the recovery of the useful component (lower quality or increased loss of the useful component in the separation tails).

Information taken into account when preparing the application:

1. Handbook of ore dressing. The main processes. / Ed. O.S. Bogdanova. 2nd ed., M., Nedra, 1983, p. 152-155.

Claims (7)

1. A device for monitoring and optimizing the operation of magnetic separation, containing a primary device (sensor) and a secondary device (controller), characterized in that, in order to control the load of the separator with ore material, a current meter is used as the primary device (sensor), or power consumption, or electricity consumption, which is installed with the ability to measure the corresponding energy parameter of the magnetic separator motor, while the sensor signal is received for processing to the secondary device (controller). 2. The device according to claim 1, characterized in that, in order to visualize the load of the separator with ore material, the device is equipped with an indicator that reflects the sensor signal processed in the secondary device (controller). 3. The device according to claim 1, characterized in that, in order to control the uniform distribution of ore supply among the separators working in the group involved in the same operation, the device contains a group of primary devices (sensors), each of which is associated with electric motor of the corresponding magnetic separator included in the group with the ability to measure the corresponding energy parameter. 4. The device according to claim 3, characterized in that, in order to control the uniform distribution of ore supply among the separators operating in the group involved in the same operation, by means of a visual representation of the load of each group separator, the device contains a display or a group of indicators installed with the ability to reflect the load of the magnetic separator by outputting the signal processed by the secondary device (controller) of the corresponding sensor. 5. The device according to claim 3, characterized in that, in order to ensure uniform distribution of ore supply among the separators operating in the group involved in the same operation, by the same load on each group separator, it further comprises a group of actuators, installed in such a way that each of them regulates the supply of ore supply to the corresponding magnetic separator by changing the degree of opening of the corresponding gate (plug) to the pulp divide le. 6. The device according to claim 4, characterized in that, in order to simplify the process of uniform distribution of ore supply among separators operating in the group involved in the same operation, it is equipped with an additional indicator that serves to display the average load of magnetic ore separators calculated in the controller by processing signals from primary devices (sensors), each of which is connected to the electric motor of the corresponding magnetic separator. 7. The device according to claim 1, characterized in that, in order to control the load of magnetic separation of ore material for each concentration stage, it contains several groups of primary devices according to the number of controlled stages of magnetic separation.