CN112691760B - Semi-autogenous mill frequency control method and device and electronic equipment - Google Patents
Semi-autogenous mill frequency control method and device and electronic equipment Download PDFInfo
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- CN112691760B CN112691760B CN202011461367.5A CN202011461367A CN112691760B CN 112691760 B CN112691760 B CN 112691760B CN 202011461367 A CN202011461367 A CN 202011461367A CN 112691760 B CN112691760 B CN 112691760B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/1805—Monitoring devices for tumbling mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
Abstract
The invention provides a method and a device for controlling the frequency of a semi-autogenous mill and electronic equipment. Wherein, the method comprises the following steps: determining the size fraction distribution state of the ore grinding overflow product; determining a power change value of the semi-autogenous mill, and determining a power state of the semi-autogenous mill based on the power change value; determining a load value of the semi-autogenous mill, and determining a load state of the semi-autogenous mill based on the load value; adjusting the frequency of the semi-autogenous mill based on the size fraction distribution status, the power status and the load status. Determining the size fraction distribution state of ore grinding overflow products, the power state of the semi-autogenous mill and the load state of the semi-autogenous mill, and adjusting the frequency of the semi-autogenous mill according to the size fraction distribution state, the power state and the load state. The mode can realize the automatic adjustment of the frequency of the semi-autogenous mill, the frequency of the semi-autogenous mill does not need to be manually adjusted, the manpower resource can be saved, and the efficiency and the product quality of the semi-autogenous mill are improved.
Description
Technical Field
The invention relates to the technical field of ore grinding, in particular to a method and a device for controlling the frequency of a semi-autogenous mill and electronic equipment.
Background
The autogenous mill, the semi-autogenous mill, the ball mill and the rod mill belong to the cylinder type ore grinding equipment which is horizontally arranged. The semi-autogenous mill is different from the ball mill and the rod mill in that the semi-autogenous mill pulverizes the material by means of impact, tumbling and grinding of the material to be treated itself (or the addition of a small amount of medium) continuously with each other in the cylinder. In addition, the grinding mill can be divided into an autogenous mill and a semi-autogenous mill according to the filling rate of the steel balls in the mill cylinder.
In an SAB (Semi-autogenous mill/Ball mill) Semi-autogenous mill ore grinding process system, a user is generally required to manually adjust the frequency of the Semi-autogenous mill, that is, the user is required to monitor data of the Semi-autogenous mill from time to time, and adjust the frequency of the Semi-autogenous mill according to the detected data. Therefore, a lot of manpower resources are consumed to monitor the semi-autogenous mill, and the manpower resources are wasted. This can also lead to a reduction in the efficiency and product quality of the mill if the user is not focused on monitoring the mill.
Disclosure of Invention
In view of this, the present invention provides a method and an apparatus for controlling a frequency of a semi-autogenous mill, and an electronic device, so as to save human resources and improve efficiency and product quality of the semi-autogenous mill.
In a first aspect, an embodiment of the present invention provides a method for controlling a frequency of a semi-autogenous mill, which is applied to a controller of the semi-autogenous mill, and the method includes: determining a real-time value of the size fraction of the grinding overflow product, and determining the size fraction distribution state of the grinding overflow product based on the real-time value of the size fraction of the grinding overflow product; determining a power change value of the semi-autogenous mill, and determining a power state of the semi-autogenous mill based on the power change value; determining a load value of the semi-autogenous mill, and determining a load state of the semi-autogenous mill based on the load value; adjusting the frequency of the semi-autogenous mill based on the size fraction distribution status, the power status and the load status.
In a preferred embodiment of the present invention, the step of determining the real-time value of the size fraction of the grinding overflow product, and determining the size fraction distribution state of the grinding overflow product based on the real-time value of the size fraction of the grinding overflow product, includes: obtaining ore grinding overflow products; classifying the ore grinding overflow products based on the size fraction diameter to obtain a plurality of kinds of overflow products; the size fraction distribution state of the grinding overflow product is determined based on the proportion of the grinding overflow product of each kind.
In a preferred embodiment of the present invention, the step of determining the power variation value of the semi-autogenous mill and determining the power state of the semi-autogenous mill based on the power variation value includes: detecting the power of the semi-autogenous mill by taking a preset first time length as a period; determining a power change value of the semi-autogenous mill in the current period based on the power of the semi-autogenous mill in the current period and the power of the semi-autogenous mill in the previous period; and determining the power state of the semi-autogenous mill in the current period based on the power change value of the semi-autogenous mill in the current period.
In a preferred embodiment of the present invention, the step of determining the power variation value of the current-period half-autogenous mill based on the power of the current-period half-autogenous mill and the power of the last-period half-autogenous mill includes: calculating the power change value of the semi-autogenous mill in the current period by the following formula: n ═ P1-P2)/T; wherein N is the power change value of the semi-autogenous mill in the current period, and P1 is the power of the semi-autogenous mill in the current period; p2 is the power of the half-autogenous mill in the previous period, and T is a preset first time period.
In a preferred embodiment of the present invention, the step of determining the load value of the semi-autogenous mill and determining the load state of the semi-autogenous mill based on the load value includes: detecting the load value of the semi-autogenous mill by taking a preset second time length as a period; and determining the load state of the semi-autogenous mill of the current period based on the load value of the semi-autogenous mill of the current period.
In a preferred embodiment of the present invention, the step of detecting the load value of the semi-autogenous mill includes: detecting a vibration value of a cylinder body of the semi-autogenous mill through a vibration sensor of the semi-autogenous mill; and determining the load value of the semi-autogenous mill based on the corresponding relation between the preset vibration value and the load value.
In a second aspect, an embodiment of the present invention further provides a frequency control device for a semi-autogenous mill, which is applied to a controller of the semi-autogenous mill, and includes: the size fraction distribution state determining module is used for determining the size fraction distribution state of the ore grinding overflow product; the power state determining module is used for determining a power change value of the semi-autogenous mill based on the size fraction distribution state and determining the power state of the semi-autogenous mill based on the power change value; the load state determining module is used for determining a load value of the semi-automatic grinding machine and determining the load state of the semi-automatic grinding machine based on the load value; and the frequency adjusting module is used for adjusting the frequency of the semi-autogenous mill based on the size fraction distribution state, the power state and the load state.
In a preferred embodiment of the present invention, the size fraction distribution status determining module is configured to obtain an overflow product of the semi-autogenous mill; classifying the ore grinding overflow products based on the size fraction diameter to obtain a plurality of kinds of overflow products; the size fraction distribution state of the grinding overflow product is determined based on the proportion of the grinding overflow product of each kind.
In a third aspect, an embodiment of the present invention further provides an electronic device, which includes a processor and a memory, where the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement the steps of the semi-autogenous mill frequency control method described above.
In a fourth aspect, the embodiments of the present invention further provide a computer-readable storage medium, where computer-executable instructions are stored, and when the computer-executable instructions are called and executed by a processor, the computer-executable instructions cause the processor to implement the steps of the semi-autogenous mill frequency control method described above.
The embodiment of the invention has the following beneficial effects:
according to the frequency control method and device for the semi-autogenous mill and the electronic equipment, provided by the embodiment of the invention, the grain size distribution state of the ore grinding overflow product, the power state of the semi-autogenous mill and the load state of the semi-autogenous mill are determined, and the frequency of the semi-autogenous mill is adjusted according to the grain size distribution state, the power state and the load state. The mode can realize the automatic adjustment of the frequency of the semi-autogenous mill, the frequency of the semi-autogenous mill does not need to be manually adjusted, the manpower resource can be saved, and the efficiency and the product quality of the semi-autogenous mill are improved.
Additional features and advantages of the disclosure will be set forth in the description which follows, or in part may be learned by the practice of the above-described techniques of the disclosure, or may be learned by practice of the disclosure.
In order to make the aforementioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a method for controlling a frequency of a semi-autogenous mill according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an SAB ore grinding process according to an embodiment of the present invention;
FIG. 3 is a flow chart of another method for controlling the frequency of a semi-autogenous mill according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a frequency control device of a semi-autogenous mill according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another frequency control device for a semi-autogenous mill according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
At present, a user is required to monitor data of the semi-autogenous mill frequently, the frequency of the semi-autogenous mill is adjusted according to the detected data, a lot of human resources are required to be consumed to monitor the semi-autogenous mill, waste of human resources is caused, and the efficiency of the semi-autogenous mill and the product quality are possibly reduced. Based on the method, the device and the electronic equipment for controlling the frequency of the semi-autogenous mill, which are provided by the embodiment of the invention, the human resources can be saved, and the efficiency and the product quality of the semi-autogenous mill can be improved.
For the convenience of understanding the present embodiment, a method for controlling the frequency of the semi-autogenous mill disclosed in the present embodiment will be described in detail.
Example 1
Referring to a flow chart of a semi-autogenous mill frequency control method shown in fig. 1, the semi-autogenous mill frequency control method includes the following steps:
and step S102, determining a real-time value of the size fraction of the grinding overflow product, and determining the size fraction distribution state of the grinding overflow product based on the real-time value of the size fraction of the grinding overflow product.
The above-mentioned frequency control method for the semi-autogenous mill is applied to a controller of the semi-autogenous mill, and the autogenous mill of this embodiment may belong to an ore grinding process system of an SAB semi-autogenous mill, wherein the ore grinding process system of the SAB semi-autogenous mill includes the semi-autogenous mill, a vibrating screen and a pump tank.
The driving of the autogenous mill is generally driven by an asynchronous motor or a synchronous motor, and adopts unilateral transmission, bilateral transmission or direct driving at the cylinder end by a motor. In order to obtain better impact effect, the rotating speed of the autogenous mill and the semi-autogenous mill can be adjusted.
The ore contains available metal minerals and needs to be recycled through processes such as crushing, grinding, flotation and the like. The SAB ore grinding process can crush ores with the diameter of less than 300mm by a semi-autogenous mill and a ball mill to be ground into particles with the size of mum, and the particles are mixed with water to form a pulp product which is used as a raw material of a flotation process. The contents of different size fractions in the pulp product directly affect the indexes of the flotation process.
Referring to fig. 2, a schematic diagram of an SAB ore grinding process is shown, as shown in fig. 2, the stream flow direction is: the ore directly enters a semi-autogenous mill for autogenous grinding, and the ore discharge product of the semi-autogenous mill enters a vibrating screen for screening. The undersize product of the vibrating screen is a qualified grain grade product of a semi-autogenous mill and is directly sent into a pump pool, the pump pool pumps ore pulp into a hydrocyclone for reclassification, and the overflow product of the hydrocyclone is a final ore grinding product; the underflow product of the hydrocyclone, namely the product with unqualified product grade, returns to the ball mill for fine grinding; and (4) enabling the ore discharge products of the ball mill to enter a pump pool for circulating classification. The oversize large granule product of shale shaker is half autogenous mill's the unqualified product of size fraction, is called "hard rock", and hard rock transports to hard rock storehouse through belt conveyer, and the ore feeder of hard rock storehouse bottom sends into the hard rock into cone crusher breakage back, recycles belt conveyer and returns to half autogenous mill feed belt, gets into half autogenous mill breakage once more with new ore together. Thus, the SAB grinding process is generally described as two systems, semi-autogenous grinding closed circuit grinding and ball mill closed circuit grinding.
The product quality index of the SAB grinding process is a size fraction distribution, which is generally expressed by the content of several size fractions from coarse to fine, such as: four product grades of 100 meshes (150 mu m), 200 meshes (74 mu m), 325 meshes (45 mu m) and 400 meshes (38 mu m) are set, and the mass content of the ore pulp in 5 grade ranges of +100 meshes, -100 to +200 meshes, -200 to +325 meshes, -325 to +400 meshes and-400 meshes is the grade distribution of the ore pulp product.
And step S104, determining the power change value of the semi-autogenous mill, and determining the power state of the semi-autogenous mill based on the power change value.
In conclusion, the particle size distribution state of the overflow product of the semi-automatic mill can be monitored in real time. If the distribution does not meet the predetermined range, the frequency of the semi-autogenous mill can be adjusted to change the size fraction distribution of the overflow product.
In general, the particle size distribution state is correlated with the power of the semi-autogenous mill, and the frequency of the semi-autogenous mill can be adjusted depending on the power state of the semi-autogenous mill. The power state of the semi-autogenous mill in this embodiment may include a power-up state or a power-steady or power-down state. That is, if the power variation value of the semi-autogenous mill is greater than 0, the power state of the semi-autogenous mill may be a power increasing state; if the power variation value of the semi-autogenous mill is less than or equal to 0, the power state of the semi-autogenous mill may be a power steady or down state.
And step S106, determining the load value of the semi-autogenous mill, and determining the load state of the semi-autogenous mill based on the load value.
The load value of the semi-autogenous mill can be understood as the amount of material filled in the semi-autogenous mill, the load state can be understood as the material filling state of the semi-autogenous mill, and the load state in the embodiment can divide the semi-autogenous mill into four states according to the amount of material in the semi-autogenous mill: empty semi-autogenous mill, full semi-autogenous mill, abnormal semi-autogenous mill.
And step S108, adjusting the frequency of the semi-autogenous mill based on the size fraction distribution state, the power state and the load state.
The present embodiment can adjust the frequency of the semi-autogenous mill according to the size fraction distribution status, the power status and the load status. Specific frequency adjusting modes can be preset, and the frequency of the semi-autogenous mill can be adjusted according to the intervals in which the size fraction distribution state, the power state and the load state are respectively located.
According to the frequency control method of the semi-autogenous mill provided by the embodiment of the invention, the size distribution state of the ore grinding overflow product, the power state of the semi-autogenous mill and the load state of the semi-autogenous mill are determined, and the frequency of the semi-autogenous mill is adjusted according to the size distribution state, the power state and the load state. The mode can realize the automatic adjustment of the frequency of the semi-autogenous mill, the frequency of the semi-autogenous mill does not need to be manually adjusted, the manpower resource can be saved, and the efficiency and the product quality of the semi-autogenous mill are improved.
Example 2
The embodiment of the invention also provides another semi-autogenous mill frequency control method; the method is realized on the basis of the method of the embodiment; the method focuses on a specific implementation mode for determining the size fraction distribution state of the ore grinding overflow product.
Another semi-autogenous mill frequency control method, as shown in fig. 3, comprises the following steps:
step S302, an ore grinding overflow product is obtained.
In this embodiment, the ore grinding overflow product may be detected in real time, and may also be referred to as an ore grinding overflow product.
And step S304, classifying the ore grinding overflow products based on the size fraction diameters to obtain a plurality of types of overflow products.
The size fraction diameters of the overflow products are different, and the overflow products can be classified according to different size fraction diameters. For example: the particle size distribution condition of the ore grinding overflow product can be detected in real time, and the particle size distribution of the ore grinding overflow product can be divided into three states according to the particle size diameter condition of the overflow product detected in real time: the grinding overflow product is too fine, the grinding overflow product is qualified, and the grinding overflow product is too coarse.
The preset range can be set to 200-300 μm, the size fraction distribution of the overflow product in the preset range is called as the pass of the grinding overflow product, the size fraction distribution of the overflow product smaller than the preset range is called as the over-fine of the grinding overflow product, and the size fraction distribution of the overflow product larger than the preset range is called as the over-coarse of the grinding overflow product.
Step S306, determining the size fraction distribution state of the ore grinding overflow products based on the proportion of the ore grinding overflow products of each kind.
The size distribution of the overflow product can be determined according to the proportion of each kind of overflow product, for example: if the proportion of the over-coarse ore grinding overflow product is high, the size fraction distribution state of the whole overflow product can be considered as the over-coarse ore grinding overflow product.
And step S308, determining the power change value of the semi-autogenous mill, and determining the power state of the semi-autogenous mill based on the power change value.
In determining the power state, the power variation value of the semi-autogenous mill may be detected by steps a 1-A3 as a cycle:
and A1, detecting the power of the semi-autogenous mill by taking a preset first time period as a period.
The first duration may be 5 minutes, for example, with 5 minutes as a cycle, and the power average is first calculated for 5 minutes per cycle of the semi-autogenous mill.
Step A2, determining the power change value of the semi-autogenous mill in the current period based on the power of the semi-autogenous mill in the current period and the power of the semi-autogenous mill in the last period.
The power change value of the semi-autogenous mill in the current period can be calculated by the following formula: n ═ P1-P2)/T; wherein N is the power change value of the semi-autogenous mill in the current period, and P1 is the power of the semi-autogenous mill in the current period; p2 is the power of the half-autogenous mill in the previous period, and T is a preset first time period.
The power may be an average power over the same time span, which may be an automatically adjusted adjustment period, for example, an adjustment period of 5 minutes.
For example: the first time period can be 5 minutes, and the power of 0-5 minutes (namely the power of the half-autogenous mill in the previous period) and the power of 5-10 minutes (namely the power of the half-autogenous mill in the current period) are calculated. Subtracting the power of 0-5 minutes from the power of 5-10 minutes, and dividing the difference by 5 to obtain the power change value of 5-10 minutes (i.e. the power change value of the semi-autogenous mill in the current period).
Step A3, determining the power state of the semi-autogenous mill in the current period based on the power change value of the semi-autogenous mill in the current period.
For example, in the SAB semi-autogenous grinding closed circuit grinding system, a set value of the power minute change of the semi-autogenous grinding machine is set as a reference for the power increase and stabilization of the semi-autogenous grinding machine, when the calculated power minute change value of the semi-autogenous grinding machine is larger than the set value of the power minute change of the semi-autogenous grinding machine, the system judges that the semi-autogenous grinding machine is in a power increase state at the moment, and when the calculated power minute change value of the semi-autogenous grinding machine is smaller than or equal to the set value of the power minute change of the semi-autogenous grinding machine, the system judges that the semi-autogenous grinding machine is in a power stabilization or descending state at the moment.
And step S310, determining the load value of the semi-autogenous mill, and determining the load state of the semi-autogenous mill based on the load value.
In calculating the load value of the semi-autogenous mill, a periodic calculation mode may also be adopted, that is, a second time period is used as a detection period, wherein the second time period may be the same as or different from the first time period, for example: detecting the load value of the semi-autogenous mill by taking a preset second time length as a period; and determining the load state of the semi-autogenous mill of the current period based on the load value of the semi-autogenous mill of the current period.
In this embodiment, the internal filling rate of the semi-autogenous mill may be detected in real time by using a mill load detection device (such as: detecting a vibration value of a cylinder body of the semi-autogenous mill through a vibration sensor of the semi-autogenous mill; and determining the load value of the semi-autogenous mill based on the corresponding relation between the preset vibration value and the load value.
Taking the second time period equal to 5 minutes as an example, the mill load and power may be calculated in the same manner, i.e., the average value of the last 5 minutes minus the average value of the first five minutes, and then divided by the adjustment time of 5 minutes. Wherein, the period of 5min is tentative, and a proper control period can be set according to the actual requirement of the user. For example, the vibration value of the cylinder of the half-autogenous mill detected by the vibration sensor every 5 minutes may be acquired first, and then the load value of the half-autogenous mill may be determined based on the correspondence between the vibration value and the load value set in advance.
In the SAB semi-autogenous grinding closed circuit grinding system, the load state can be determined according to the load value, for example: setting the average load value per minute of the semi-autogenous mill as the criterion of the filling state (namely the load state) of the semi-autogenous mill, wherein the semi-autogenous mill is divided into four states according to the amount of materials in the semi-autogenous mill: empty semi-autogenous mill, full semi-autogenous mill, abnormal semi-autogenous mill. The detection intervals of the load detection of the grinding machine are averaged into five parts, wherein the load detection value of the empty state of the semi-autogenous grinding machine accounts for 1/5 of the total measurement interval, the load detection value of the charging state of the semi-autogenous grinding machine accounts for 1/5 of the total measurement interval, the load detection value of the full state of the semi-autogenous grinding machine accounts for 1/5 of the total measurement interval, and the load detection value of the abnormal state of the semi-autogenous grinding machine accounts for 2/5 of the total measurement interval.
According to the principle of the mill load detection, the smaller the measured value is, the higher the mill filling rate is. The semi-autogenous mill is judged to be in one of four states of empty, full and abnormal at the moment by detecting the interval where the mill load detection value of the semi-autogenous mill is located in real time. And simultaneously setting a semi-autogenous mill frequency adjustment interval corresponding to each state, wherein the semi-autogenous mill frequency value corresponding to the abnormal state of the semi-autogenous mill can be the maximum value in the frequency adjustment interval.
Step S312, adjusting the frequency of the semi-autogenous mill based on the size fraction distribution state, the power state and the load state.
Specifically, the step of adjusting the frequency of the semi-autogenous mill based on the size fraction distribution status, the power status, and the load status may be:
and if the ore grinding overflow product is detected to be in an over-coarse state, the load detection of the semi-autogenous mill meets the empty state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is stable, and the frequency of the semi-autogenous mill is reduced in a frequency adjustment interval corresponding to the empty semi-autogenous mill.
And if the ore grinding overflow product is detected to be in a qualified state, the load detection of the semi-autogenous mill meets the empty state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is stable, and the frequency of the semi-autogenous mill is kept unchanged.
And if the ore grinding overflow product is detected to be in an excessively fine state, the load detection of the semi-autogenous mill meets the empty state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is stable, and the frequency of the semi-autogenous mill is increased in a frequency adjustment interval corresponding to the empty semi-autogenous mill.
And if the ore grinding overflow product is detected to be in a qualified state, the load detection of the semi-autogenous mill meets the charging state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is stable, and the frequency of the semi-autogenous mill is kept unchanged.
And if the ore grinding overflow product is detected to be in an excessively fine state, the load detection of the semi-autogenous mill meets the charging state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is stable, and the frequency of the semi-autogenous mill is increased in a frequency adjustment interval corresponding to the charging of the semi-autogenous mill.
And if the ore grinding overflow product is detected to be in an over-coarse state, the load detection of the semi-autogenous mill meets the full state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is stable, and the frequency of the semi-autogenous mill is reduced in a frequency adjustment interval corresponding to the full state of the semi-autogenous mill.
If the ore grinding overflow product is detected to be in a qualified state, the load detection of the semi-autogenous mill meets the full state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is stable, and the frequency of the semi-autogenous mill is kept unchanged.
And if the ore grinding overflow product is detected to be in an excessively fine state, the load detection of the semi-autogenous mill meets the full state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is stable, and the frequency of the semi-autogenous mill is increased in a frequency adjustment interval corresponding to the full state of the semi-autogenous mill.
And if the ore grinding overflow product is detected to be in an over-coarse state, the load detection of the semi-autogenous mill meets the empty state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is increased, and the frequency of the semi-autogenous mill is kept unchanged.
And if the ore grinding overflow product is detected to be in a qualified state, the load detection of the semi-autogenous mill meets the empty state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is increased, and the frequency of the semi-autogenous mill is increased in a frequency adjustment interval corresponding to the empty semi-autogenous mill.
And if the ore grinding overflow product is detected to be in an excessively fine state, the load detection of the semi-autogenous mill meets the empty state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is increased, the frequency of the semi-autogenous mill is increased in a frequency adjustment interval corresponding to the empty semi-autogenous mill, and the increase amplitude is increased.
And if the ore grinding overflow product is detected to be in an over-coarse state, the load detection of the semi-autogenous mill meets the charging state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is increased, and the frequency of the semi-autogenous mill is kept unchanged.
And if the ore grinding overflow product is detected to be in a qualified state, the load detection of the semi-autogenous mill meets the charging state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is increased, and the frequency of the semi-autogenous mill is increased in a frequency adjustment interval corresponding to the charging of the semi-autogenous mill.
If the ore grinding overflow product is detected to be in an excessively fine state, the load detection of the semi-autogenous mill meets the charging state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is increased, the frequency of the semi-autogenous mill is increased in a frequency adjustment interval corresponding to the charging of the semi-autogenous mill, and the increase amplitude is increased.
And if the ore grinding overflow product is detected to be in an over-coarse state, the load detection of the semi-autogenous mill meets the full state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is increased, and the frequency of the semi-autogenous mill is kept unchanged.
And if the ore grinding overflow product is detected to be in a qualified state, the load detection of the semi-autogenous mill meets the full state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is increased, and the frequency of the semi-autogenous mill is increased in a frequency adjustment interval corresponding to the full state of the semi-autogenous mill.
And if the ore grinding overflow product is detected to be in an excessively fine state, the load detection of the semi-autogenous mill meets the full state of the semi-autogenous mill, the minute change speed of the power of the semi-autogenous mill is increased, the frequency of the semi-autogenous mill is increased in a frequency adjustment interval corresponding to the full state of the semi-autogenous mill, and the increase amplitude is increased.
And if the load detection of the semi-autogenous mill meets the abnormal state of the semi-autogenous mill, adding the frequency of the semi-autogenous mill to the interval adjustment maximum value.
In summary, when the grain size distribution state is that the ore grinding overflow product is too fine or the ore grinding overflow product is too coarse, the frequency of the semi-autogenous mill needs to be adjusted. When the particle size distribution state is the qualified state of the ore grinding overflow product, the frequency of the semi-autogenous mill can be kept unchanged without adjusting the frequency of the semi-autogenous mill.
The method provided by the embodiment of the invention can monitor the size fraction distribution of the ore grinding overflow product; calculating the minute change speed of the power of the semi-autogenous mill; and (3) carrying out load detection of on-line vibration of the semi-autogenous mill, and when the ore grinding overflow product changes in the SAB ore grinding process system, adjusting the frequency of a main motor of the semi-autogenous mill by analyzing the filling rate of the semi-autogenous mill and the power minute change speed of the semi-autogenous mill until the particle size distribution of the ore grinding overflow product meets the field process requirement, so that the frequency of the semi-autogenous mill is combined with the field actual production condition, and the treatment efficiency of the whole SAB ore grinding process system is improved.
Example 3
Corresponding to the above method embodiment, an embodiment of the present invention provides a frequency control device for a semi-autogenous mill, as shown in fig. 4, which includes:
a size fraction distribution state determining module 41, configured to determine a size fraction real-time value of the grinding overflow product, and determine a size fraction distribution state of the grinding overflow product based on the size fraction real-time value of the grinding overflow product;
a power state determination module 42 for determining a power variation value of the semi-autogenous mill, determining a power state of the semi-autogenous mill based on the power variation value;
a load state determination module 43 for determining a load value of the semi-autogenous mill, determining a load state of the semi-autogenous mill based on the load value;
a frequency adjustment module 44 for adjusting a frequency of the semi-autogenous mill based on the size fraction distribution status, the power status, and the load status.
The semi-autogenous mill frequency control device provided by the embodiment of the invention determines the particle size distribution state of ore grinding overflow products, the power state of the semi-autogenous mill and the load state of the semi-autogenous mill, and adjusts the frequency of the semi-autogenous mill according to the particle size distribution state, the power state and the load state. The mode can realize the automatic adjustment of the frequency of the semi-autogenous mill, the frequency of the semi-autogenous mill does not need to be manually adjusted, the manpower resource can be saved, and the efficiency and the product quality of the semi-autogenous mill are improved.
The particle size distribution state determining module is used for acquiring ore grinding overflow products; classifying the ore grinding overflow products based on the size fraction diameter to obtain a plurality of kinds of overflow products; the size fraction distribution state of the grinding overflow product is determined based on the proportion of the grinding overflow product of each kind.
The power state determining module is used for detecting the power of the semi-autogenous mill by taking a preset first time length as a period; determining a power change value of the semi-autogenous mill in the current period based on the power of the semi-autogenous mill in the current period and the power of the semi-autogenous mill in the previous period; and determining the power state of the semi-autogenous mill in the current period based on the power change value of the semi-autogenous mill in the current period.
The power state determining module is used for calculating the power change value of the semi-autogenous mill in the current period according to the following formula: n ═ P1-P2)/T; wherein N is the power change value of the semi-autogenous mill in the current period, and P1 is the power of the semi-autogenous mill in the current period; p2 is the power of the half-autogenous mill in the previous period, and T is a preset first time period.
The load state determining module is used for detecting the load value of the semi-autogenous mill by taking a preset second time length as a period; and determining the load state of the semi-autogenous mill of the current period based on the load value of the semi-autogenous mill of the current period.
The load state determining module is used for detecting the vibration value of the cylinder of the semi-autogenous mill through a vibration sensor of the semi-autogenous mill; and determining the load value of the semi-autogenous mill based on the corresponding relation between the preset vibration value and the load value.
Referring to the schematic structural diagram of another semi-autogenous mill frequency control device shown in fig. 5, the semi-autogenous mill frequency control device further includes: and the frequency maintaining module 45 is connected with the size fraction distribution state determining module 41 and is used for maintaining the frequency of the semi-autogenous mill unchanged.
The semi-autogenous mill frequency control device provided by the embodiment of the invention has the same technical characteristics as the semi-autogenous mill frequency control method provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
Example 4
The embodiment of the invention also provides electronic equipment for operating the frequency control method of the semi-autogenous mill; referring to the schematic structural diagram of an electronic device shown in fig. 6, the electronic device includes a memory 100 and a processor 101, where the memory 100 is used to store one or more computer instructions, and the one or more computer instructions are executed by the processor 101 to implement the above-mentioned semi-autogenous mill frequency control method.
Further, the electronic device shown in fig. 6 further includes a bus 102 and a communication interface 103, and the processor 101, the communication interface 103, and the memory 100 are connected through the bus 102.
The Memory 100 may include a high-speed Random Access Memory (RAM) and may further include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface 103 (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like can be used. The bus 102 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 6, but that does not indicate only one bus or one type of bus.
The processor 101 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 101. The Processor 101 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component. The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 100, and the processor 101 reads the information in the memory 100, and completes the steps of the method of the foregoing embodiment in combination with the hardware thereof.
The embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called and executed by a processor, the computer-executable instructions cause the processor to implement the above-mentioned semi-autogenous mill frequency control method.
The method and the device for controlling the frequency of the half-autogenous mill and the computer program product of the electronic device provided by the embodiment of the invention comprise a computer readable storage medium storing program codes, instructions included in the program codes can be used for executing the method in the previous method embodiment, and specific implementation can be referred to the method embodiment and is not described herein again.
It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the apparatus and/or the electronic device described above may refer to corresponding processes in the foregoing method embodiments, and are not described herein again.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A method of controlling the frequency of a semi-autogenous mill, for application to a controller of the semi-autogenous mill, the method comprising:
determining a real-time value of the size fraction of the grinding overflow product, and determining the size fraction distribution state of the grinding overflow product based on the real-time value of the size fraction of the grinding overflow product;
determining a power change value of the semi-autogenous mill, determining a power state of the semi-autogenous mill based on the power change value;
determining a load value of the semi-autogenous mill, determining a load state of the semi-autogenous mill based on the load value;
adjusting a frequency of the semi-autogenous mill based on the size fraction distribution status, the power status, and the load status;
determining a power variation value of the semi-autogenous mill, the step of determining a power state of the semi-autogenous mill based on the power variation value, comprising:
detecting the power of the semi-autogenous mill by taking a preset first time length as a period;
determining a power change value of the semi-autogenous mill in the current period based on the power of the semi-autogenous mill in the current period and the power of the semi-autogenous mill in the last period;
and determining the power state of the semi-autogenous mill in the current period based on the power change value of the semi-autogenous mill in the current period.
2. A method according to claim 1, wherein the step of determining a real-time value of the size fraction of the mill overflow product, and determining the size fraction distribution of the mill overflow product based on the real-time value of the size fraction of the mill overflow product, comprises:
obtaining ore grinding overflow products;
classifying the ore grinding overflow products based on the size fraction diameter to obtain a plurality of types of overflow products;
determining a size fraction distribution state of the mill overflow product based on a proportion of the mill overflow product for each category.
3. The method according to claim 1, characterized in that the step of determining the value of the variation of the power of the semi-autogenous mill for the current cycle on the basis of the power of the semi-autogenous mill for the current cycle and the power of the semi-autogenous mill for the last cycle comprises:
calculating the power change value of the semi-autogenous mill in the current period by the following formula: n ═ P1-P2)/T;
wherein N is the power change value of the semi-autogenous mill in the current period, and P1 is the power of the semi-autogenous mill in the current period; p2 is the power of the half-autogenous mill in the last period, and T is a preset first time length.
4. The method according to claim 1, characterized in that determining a load value of said semi-autogenous mill, the step of determining a load condition of said semi-autogenous mill on the basis of said load value, comprises:
detecting the load value of the semi-autogenous mill by taking a preset second time length as a period;
determining the load state of the semi-autogenous mill in the current period based on the load value of the semi-autogenous mill in the current period.
5. The method according to claim 4, characterized in that the step of detecting the load value of the semi-autogenous mill comprises:
detecting a vibration value of a cylinder of the semi-autogenous mill by a vibration sensor of the semi-autogenous mill;
and determining the load value of the semi-autogenous mill based on the corresponding relation between the preset vibration value and the load value.
6. A semi-autogenous mill frequency control apparatus, for use in a controller of the semi-autogenous mill, the apparatus comprising:
the size fraction distribution state determining module is used for determining a size fraction real-time value of the grinding overflow product and determining the size fraction distribution state of the grinding overflow product based on the size fraction real-time value of the grinding overflow product;
the power state determination module is used for determining a power change value of the semi-autogenous mill and determining the power state of the semi-autogenous mill based on the power change value;
a load state determination module for determining a load value of the semi-autogenous mill, determining a load state of the semi-autogenous mill based on the load value;
a frequency adjustment module to adjust a frequency of the semi-autogenous mill based on the size fraction distribution status, the power status, and the load status;
the power state determining module is further used for detecting the power of the semi-autogenous mill by taking a preset first time length as a period; determining a power change value of the semi-autogenous mill in the current period based on the power of the semi-autogenous mill in the current period and the power of the semi-autogenous mill in the last period; and determining the power state of the semi-autogenous mill in the current period based on the power change value of the semi-autogenous mill in the current period.
7. The apparatus of claim 6, wherein the size fraction distribution status determining module is configured to obtain a grinding overflow product; classifying the ore grinding overflow products based on the size fraction diameter to obtain a plurality of types of overflow products; and determining the size fraction distribution state of the ore grinding overflow products based on the proportion of the ore grinding overflow products of each kind.
8. An electronic device, comprising a processor and a memory, said memory storing computer-executable instructions executable by said processor, said processor executing said computer-executable instructions to implement the steps of the method of frequency control of a semi-autogenous mill according to any one of claims 1 to 5.
9. A computer-readable storage medium storing computer-executable instructions which, when invoked and executed by a processor, cause the processor to implement the steps of the semi-autogenous mill frequency control method of any one of claims 1 to 5.
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