A grinding work index discrimination system

Abstract

The present disclosure provides a grinding work index discrimination system, comprising: a grinding system for grinding a mineral sample; an online particle size testing system for measuring the grinding particle size of the ore pulp in the grinding system in real time; an electric control system for receiving a user input test target, controlling the medium storage system, the ore sample adding system and the water source adding system according to the test target, receiving the grinding particle size of the ore pulp measured by the online particle size testing system, recording the total grinding time, and calculating the grinding work index according to the total grinding time and the test target. The present disclosure constructs a test device suitable for various types of grinding machines, collects the grinding particle size of the ore pulp from the grinding system through a closed sampling method to ensure the accuracy of the test data, and the electric control system can realize automatic system control based on the test target and automatic recording of test related parameters, accurately calculates the grinding work index, and provides reference and experimental data for grinding selection.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of industrial equipment, and particularly relates to a grinding power index discrimination system. BACKGROUND

[0002] At present, the selection experiment of the mill mainly relies on the experiment of the small power industrial equipment, and the large power industrial equipment selection data is obtained through the experiment data amplification, and there is no special experimental equipment. The experimental parameters of the industrial equipment are wide, the sampling time and the sampling position are uncertain, which are all factors affecting the accuracy of the experiment. If the selection of the large power industrial equipment relies on these experimental data, the selection error and the power design waste will be caused due to the amplification error. SUMMARY

[0003] Embodiments of the present disclosure aim to provide a grinding power index discrimination system to solve the problem that the large power industrial equipment mainly relies on experience in the prior art, which is easy to cause the selection error and the power design waste.

[0004] Embodiments of the present disclosure adopt the following technical scheme: a grinding power index discrimination system, comprising: a mill system, configured to grind a mineral sample; an online particle size test system, configured to measure the grinding particle size of the ore pulp in the mill system in real time; a medium storage system, configured to store grinding media and to put the grinding media into the mill system under the control of an electric control system; a sample adding system, configured to put the mineral sample into the mill system under the control of the electric control system; a water source adding system, configured to add clean water into the mill system under the control of the electric control system; and the electric control system, configured to receive a test target input by a user, to control the medium storage system, the sample adding system and the water source adding system according to the test target, to receive the grinding particle size of the ore pulp measured by the online particle size test system, to record the total grinding time, and to calculate the grinding power index according to the total grinding time and the test target.

[0005] In some embodiments, the mill system at least comprises a driving mechanism, a stirring shaft and a grinding cylinder, the grinding cylinder is configured to contain the mineral sample, the grinding media and the clean water, and the stirring shaft is configured to grind the mineral sample under the driving of the driving mechanism.

[0006] In some embodiments, the online particle size test system is specifically configured to collect the grinding particle size of the ore pulp at different positions in the grinding cylinder.

[0007] In some embodiments, the electric control system is further configured to record the torque and the power of the driving mechanism in real time.

[0008] In some embodiments, the mill system is a vertical mill system or a horizontal mill system.

[0009] In some embodiments, the online particle size testing system is specifically configured to collect the grinding particle size of the ore pulp in the mill system at preset time intervals.

[0010] In some embodiments, the test target at least includes mineral sample particle size, target product particle size, processing capacity and grinding medium filling rate.

[0011] In some embodiments, the electric control system is further configured to detect whether the grinding ore pulp particle size uploaded by the online particle size testing system is less than or equal to the target product particle size, and control the mill system to stop running when the grinding ore pulp particle size is less than or equal to the target product particle size.

[0012] In some embodiments, the system further comprises a ball washing system configured to wash the grinding medium, and the medium storage system is further configured to receive the washed grinding medium from the ball washing system.

[0013] In some embodiments, the system further comprises a tailings processing system configured to process the tailings in the mill system after the test is completed.

[0014] The embodiments of the present disclosure have the advantages that a test device suitable for various types of mills is constructed, the online particle size testing system of the device collects the grinding particle size of the ore pulp from the mill system through a closed sampling method to ensure the accuracy of the test data, and the electric control system can realize automatic system control based on the test target, automatically record the test related parameters, accurately calculate the grinding work index, improve the accuracy of the type selection test, and provide reference and experimental data for the mill type selection. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the one or more embodiments of the present disclosure or the prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present disclosure, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0016] Figure 1 FIG. 1 is a structural schematic diagram of a grinding work index discrimination system in a first embodiment of the present disclosure;

[0017] Figure 2 FIG. 2 is another structural schematic diagram of the grinding work index discrimination system in the first embodiment of the present disclosure. DETAILED DESCRIPTION

[0018] In order to make the person skilled in the art better understand the technical solutions in one or more embodiments of the present specification, the technical solutions in one or more embodiments of the present specification will be described clearly and completely in the following in combination with the drawings in one or more embodiments of the present specification. Obviously, the described embodiments are only a part of the embodiments of the present specification, not all the embodiments. Based on one or more embodiments of the present specification, all other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present document.

[0019] At present, the selection experiment of the mill mainly relies on the small-power industrial equipment to carry out the experiment, and the large-scale industrial equipment selection data is obtained through the experimental data amplification, and there is no special experimental equipment. The experimental parameters of industrial equipment are often wide, the sampling time and sampling position are indefinite, which are all factors affecting the accuracy of the experiment. If the selection of large-scale industrial equipment relies on these experimental data, the selection will be inaccurate due to the amplification error, and the power design will be wasted.

[0020] In order to solve the above problems, the present embodiment provides a grinding work index discrimination system, which is a laboratory equipment built in a laboratory environment and used for the selection of large-scale industrial grinding equipment. Specifically, the grinding work index is a kind of index indicating the difficulty of material crushing or grinding in mineral processing. The initial concept is to consume unit work when crushing the material without limiting particle size to 100 μm particle size. In the present embodiment, it can be limited to the unit work consumed when crushing the mineral sample to the target product particle size. This parameter is affected by the particle size of the mineral sample, the processing capacity of the mineral sample, the grinding medium condition and other conditions, so it is necessary to select the industrial equipment according to the actual demand combined with multiple tests; but due to the large single processing capacity of the industrial equipment, the single running time is long, and the operation of adjusting the different types and conditions of the mineral sample in the equipment is more complicated, and there is a situation of inaccurate data collection, which cannot meet the actual selection test demand, therefore, the present embodiment constructs the grinding work index discrimination system in the experimental environment to assist the selection of the equipment in the industrial environment, and can provide the test parameters as the scientific research assistance.

[0021] The structural schematic diagram of the discrimination system of the present embodiment is as shown in Figure 1As shown, the system mainly includes the following parts: a mill system 1, mainly used for grinding mineral samples; an online particle size testing system 2, mainly used for measuring the grinding particle size of the ore pulp in the mill system 1 in real time; a medium storage system 5, mainly used for storing grinding media and feeding the grinding media into the mill system 1 under the control of an electric control system 8; a sample adding system 6, used for feeding mineral samples into the mill system 1 under the control of the electric control system 8; a water source adding system 7, used for adding clean water into the mill system 1 under the control of the electric control system 8; and the electric control system 8, used for receiving the test target input by a user, controlling the medium storage system 5, the sample adding system 6 and the water source adding system 7 according to the test target, receiving the grinding particle size of the ore pulp measured by the online particle size testing system 2, recording the total grinding time, and calculating the grinding work index according to the total grinding time and the test target. It should be noted that, Figure 1 The electric control system 8 is not directly connected to other systems by lines, and can actually communicate with the above-mentioned systems and control the above-mentioned systems through wired or wireless means.

[0022] Specifically, as shown in Figure 1 The mill system 1 at least includes a driving mechanism 101, a stirring shaft 102 and a grinding cylinder 103, wherein the grinding cylinder 103 contains mineral samples, grinding media and clean water, and the stirring shaft 102 realizes the grinding of the mineral samples in the grinding cylinder 103 under the driving action of the driving mechanism 101, forming ore pulp. In actual implementation, the driving mechanism 101 can be a variable frequency motor, and is equipped with a torque power sensor, so that the electric control system 8 can obtain the torque and power of the driving mechanism in real time; in addition, the actual driving relationship between the driving mechanism 101 and the stirring shaft 102 can be driving through a belt, or connecting through a speed reducer, etc., and the embodiment does not limit the specific connection mode, as long as the stirring shaft 102 can realize the grinding function of the mineral samples under the driving of the driving mechanism 101.

[0023] The online particle size testing system 2 collects the grinding particle size of the ore pulp from the mill system 1 by extraction, which can actually be performed at a preset time interval, and uploads the collected ore pulp grinding particle size to the electric control system 8 for recording. The preset time interval can be set by the operator on the electric control system 8 according to the mineral sample condition and actual grinding requirements, and the electric control system 8 can control the online particle size testing system 2 according to the operator's setting. In some embodiments, the online particle size testing system 2 can actually collect the grinding particle size of the ore pulp from different positions in the grinding cylinder 103 of the mill system 1, such as the upper, middle and lower parts of the cylinder, respectively. In general, the grinding particle size of the ore pulp at different positions is different, the grinding particle size of the ore pulp at the lower part of the cylinder is relatively coarse, the grinding particle size of the ore pulp at the upper part of the cylinder is relatively fine, and the grinding particle size of the ore pulp at the middle part of the cylinder is moderate. Therefore, in the actual subsequent reference calculation, the electric control system 8 can take the data collected by the online particle size testing system 2 at the middle part of the cylinder as the main basis, and take the data collected at the upper and lower parts as the reference for subsequent parameter calculation. In addition, for the ore pulp in the same part of the cylinder, the online particle size testing system 2 can also set multiple different collection points for ore pulp extraction, and the electric control system 8 can record and take the average grinding particle size of the ore pulp at all collection points as the data basis for subsequent calculation.

[0024] In this embodiment, the medium storage system 5 stores grinding media of different diameters and different types. Based on different test requirements, the medium storage system 5 can put the grinding media of appropriate diameter, appropriate type and appropriate weight into the grinding cylinder 103 of the mill system 1 according to the control of the electric control system 8 in a single test. Similarly, the ore sample adding system 6 and the water source adding system 7 are used to store mineral samples and water, respectively, and both of them put the mineral samples and water of appropriate weight into the grinding cylinder 103 of the mill system 1 based on the control of the electric control system 8.

[0025] The electric control system 8 is the control core of the discrimination system, and is used for realizing control and data recording of the remaining systems. An operator can input a test target by directly operating the electric control system 8, and the electric control system 8 can autonomously control the systems according to the specific content of the test target input by the operator. Specifically, the test target input by the operator at least includes parameters such as a mineral sample particle size, a target product particle size, a processing capacity, and a grinding medium filling rate. The mineral sample particle size is the original particle size of the mineral sample input in this test. The target product particle size refers to the particle size of the mineral sample after grinding in this test. The processing capacity refers to the total processing capacity of the mineral sample in this test. The grinding medium filling rate refers to the proportion of the grinding medium input in this test. The specific content of the above test target will affect the grinding work index of this test. The total grinding time of the mineral sample in this test can be combined to calculate the grinding work index.

[0026] In some embodiments, the electric control system 8 should include a physical operation device, for example, it can be a computer with a processor, a memory, a display screen, a keyboard, a mouse, and other input devices, or a console. After the operator inputs the test target into the electric control system 8, the operator can click the start button, and the electric control system 8 controls the remaining systems to start and perform grinding, material feeding, and sampling operations. At the same time, the electric control system 8 records the start time. As the test progresses, the online particle size testing system 2 continuously uploads the grinding particle size of the slurry in the grinding cylinder, and the electric control system 8 detects whether the grinding particle size of the slurry is less than or equal to the target product particle size after receiving the grinding particle size of the slurry uploaded by the online particle size testing system 2. If the grinding particle size of the slurry is less than or equal to the target product particle size, it means that the mineral sample has been ground, and the electric control system 8 can control the mill system 1 to stop running and record the stop time. According to the start time and the stop time, the total grinding time, i.e., the total time consumed for grinding the mineral sample from its original particle size to the target product particle size, can be calculated. Finally, the grinding work index can be calculated by combining the specific content of the test target, the torque, the power, and other parameters of the driving mechanism. Based on the grinding work index calculated in this test, the grinding work index of the actual industrial equipment can be obtained by combining the proportional relationship between the experimental equipment and the actual industrial equipment, which can be used as a reference for selecting the actual industrial equipment.

[0027] Further reference is made to Figure 1, the grinding index discrimination system can further include a ball washing system 3 and a tailings treatment system 4, wherein the ore pulp is punched into the ball washing system 3 together with the grinding medium after the test is completed, the ball washing system 3 has a screen 301 inside, the grinding medium is left on the screen 301, the ore pulp flows into the tailings treatment system 4 for treatment, the grinding medium is left in the ball washing system 3 for cleaning, and after cleaning, the grinding medium is punched into the medium storage system 5 for reuse, and the tailings treatment system 4 can also treat the waste liquid for cleaning the grinding medium, which is safe and environmentally friendly.

[0028] It should be noted that, Figure 1 The mill system 1 in the grinding index discrimination system is a vertical mill system, and can also be a horizontal mill system, and the structure diagram of the discrimination system is as shown in Figure 2 .

[0029] In actual experiments, the operator sets the input mineral particle size, target product particle size, treatment capacity, and grinding medium filling rate in the electric control system, grinds the mineral through the mill system 1, detects the grinding particle size of the ore pulp through the online particle size testing system 2, when the ground mineral has reached the set target particle size, the valve at the lower part of the grinding cylinder 103 is opened, the motor is automatically stopped, the ore pulp is punched into the ball washing system 3 together with the grinding medium, the grinding medium is left on the screen 301, the ore pulp is punched into the tailings treatment system 4 for treatment, the grinding medium is left in the ball washing system 3 for cleaning, and after cleaning, the grinding medium is punched into the medium storage system 5; according to the experimental requirements, the grinding medium with appropriate diameter, appropriate type and appropriate weight is selected from the medium storage system 5, the mineral sample and water with appropriate weight are selected from the mineral sample adding system 6 and the water source adding system 7, and the medium storage system 5, the mineral sample adding system 6 and the water source adding system 7 are all provided with weight sensors and can be quantitatively added; the electric control system 8 records the total grinding time and calculates the grinding index, which provides a basis for industrial equipment selection.

[0030] The disclosed embodiment constructs a test device suitable for various types of mills, the online particle size testing system of the device collects the grinding particle size of the ore pulp from the mill system through a closed sampling mode to ensure the accuracy of the test data, the electric control system can realize automatic system control based on the test target, automatically records the test related parameters, accurately calculates the grinding index, improves the accuracy of the selection test, and provides reference and experimental data for the grinding selection.

[0031] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, and are not intended to limit the present disclosure; although the present disclosure has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A grinding performance index discrimination system characterized by, The application relates to a grinding system for grinding a mineral sample, comprising: a grinding mechanism; an online particle size testing system for measuring the grinding particle size of the mineral slurry in the grinding system in real time; a medium storage system for storing grinding medium and feeding the grinding medium into the grinding system under the control of an electric control system; a sample adding system for feeding the mineral sample into the grinding system under the control of the electric control system; a water source adding system for adding clean water into the grinding system under the control of the electric control system; an electric control system for receiving a test target input by a user, controlling the medium storage system, the sample adding system and the water source adding system according to the test target, receiving the grinding particle size of the mineral slurry measured by the online particle size testing system, recording the total grinding time, calculating the grinding work index according to the total grinding time and the test target, and recording the torque and power of the driving mechanism in real time; wherein the test target at least comprises the particle size of the mineral sample, the target product particle size, the processing capacity and the grinding medium filling rate.

2. The mill work index discrimination system of claim 1, wherein, The grinding system further comprises a stirring shaft and a grinding cylinder for containing the mineral sample, the grinding medium and the clean water, and the stirring shaft is used for grinding the mineral sample under the drive of the driving mechanism.

3. The mill work index discrimination system of claim 2, wherein, The online particle size testing system is specifically used for collecting the grinding particle size of the mineral slurry at different positions in the grinding cylinder.

4. The mill work index discrimination system of claim 1, wherein, The grinding system is a vertical grinding system or a horizontal grinding system.

5. The mill work index discrimination system of claim 1, wherein, The online particle size testing system is specifically used for collecting the grinding particle size of the mineral slurry in the grinding system at preset time intervals.

6. The mill work index discrimination system of claim 1, wherein, The electric control system is further used for detecting whether the grinding particle size of the mineral slurry uploaded by the online particle size testing system is smaller than or equal to the target product particle size, and controlling the grinding system to stop running when the grinding particle size of the mineral slurry is smaller than or equal to the target product particle size.

7. The mill work index discrimination system according to any one of claims 1 to 6, characterized in that, The application further relates to a grinding system for grinding a mineral sample, comprising: a washing system for washing the grinding medium; the medium storage system is further used for receiving the washed grinding medium from the washing system.

8. The mill work index discrimination system of any one of claims 1 to 6, wherein, The application further relates to a grinding system for grinding a mineral sample, comprising: a tailing treatment system for treating the tailings in the grinding system after the test is completed.

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