CN103406193B - Method and device for controlling discharging of multiple ore grinding bins in ore grinding process - Google Patents

Abstract

The invention discloses a method and device for controlling discharging of multiple ore grinding bins in an ore grinding process. The method comprises the steps: determining a fundamental vibrating frequency of current controlled discharging according to the current actual discharging amount in the ore grinding process; detecting an actual material level of each ore grinding bin, and calculating a frequency regulating coefficient of each ore grinding bin according to the actual material level of each ore grinding bin, wherein the lower the actual material level of the ore grinding bin is, the smaller the frequency regulating coefficient is; determining a product of the frequency regulating coefficient of each ore grinding bin and the fundamental vibrating frequency as a target vibrating frequency of a vibrating ore feeder of each ore grinding bin. According to the technical scheme of the invention, the condition of emptying of the ore grinding bin in a discharging process can be effectively avoided, the probability of ore-free operation of the vibrating ore feeder is reduced, and thus the condition that the actual discharging amount greatly deviates from the controlled discharging amount instantly due to emptying of the ore grinding bin is reduced so that the discharging amount of the ore grinding is uniform and accurate, and the granularity of ore ground products is stable.

Description

The method and apparatus that in a kind of grinding process, the blanking of many ore grindings storehouse controls

Technical field

The application relates to ore smelting field, particularly relates to the method and apparatus that in a kind of grinding process, the blanking of many ore grindings storehouse controls.

Background technology

In the production process of ore smelting, owing to digging up mine, the raw ore ore obtained does not reach smelting requirements, needs first to carry out ore dressing to raw ore ore, thus obtains the concentrate meeting smelting requirements, be used further to smelting process.The links such as ore-dressing practice mainly comprises crushing and screening, grind grading to raw ore ore, sorts, essence mine dehydration.Wherein, grinding process is by the ore grinding of fragmentation to suitable granularity, and the mineral pulverized are supplied to the process of sorting.In grinding process, because ore is pulverized, effective mineralogical composition can dissociate out from gangue, and different effective mineralogical composition is dissociated mutually.

Grinding operation is to provide the critical process sorting raw material, to the control situation of grinding process, will directly have influence on the granularity of ore milling product, and then impact sorts the quality of process and dressing product.Because various mineral aggregate has different optimum granularity under various different mineral processing circuit, therefore, for given mineral aggregate and mineral processing circuit, need to ensure that the particle size stable of ore milling product is in the optimum granularity of this given mineral aggregate and mineral processing circuit.

Under the grinding process controlled condition set, product granularity entirety can change along with the ore grinding storehouse discharge quantity change of grinding process, therefore, in order to enable the granularity of ore milling product be stabilized in the optimum granularity of this grinding process controlled condition, the ore grinding storehouse discharge quantity controlling grinding process is just needed to be stabilized on control discharge quantity corresponding to this optimum granularity.See Fig. 1, the equipment relating to the blanking of ore grinding storehouse showing a kind of grinding process is formed, the broken mineral aggregate crossed is stored in each ore grinding storehouse, throw in on the conveyer belt of same conveyer by the control of the vibrofeeder (M1 ~ M6) of each ore grinding bin discharge port external, so that mineral aggregate is delivered in ore mill by this conveyer belt carry out grinding operation, wherein, vibrofeeder controls the actual discharge quantity in ore grinding storehouse according to vibration frequency.Being stabilized in keep the actual discharge quantity in ore grinding storehouse controls on discharge quantity, in prior art, the vibration frequency of each vibrofeeder is that the actual discharge quantity (WI) current according to ore grinding storehouse regulates, wherein, described actual discharge quantity is obtained by the mineral aggregate weight detected on conveyer belt, is the summation of each actual cutting stock weight in ore grinding storehouse.

In a grinding process, usually adopt multiple ore grinding storehouse to be this grinding attachment operation feed, wherein, the discharging opening in each ore grinding storehouse controls blanking by vibrofeeders different separately respectively simultaneously.In the prior art, the vibration frequency of each vibrofeeder is all identical, particularly, when controlling vibration frequency, first according to current actual discharge quantity Calculation Basis vibration frequency, then the vibration frequency of each vibrofeeder is all set to this reference oscillation frequency.But in the grinding process of reality, the mineral aggregate diameter formed after fragmentation due to ore is between 0 ~ 300 millimeter, the granular size of mineral aggregate is also uneven, and bulk mineral aggregate throws in speed slowly, it is fast that speed thrown in by fritter mineral aggregate, so, even if the vibration frequency of each vibrofeeder immobilizes, also can there is fluctuation among a small circle in actual discharge quantity (WI), visible, and in fact the speed of each different ore grinding storehouse blanking there are differences.Therefore, conventionally for the vibrofeeder in each ore grinding storehouse is arranged to identical vibration frequency, through the regular hour, difference on the blanking velocity of each ore grinding storehouse will cause part ore grinding storehouse to occur the situation of hole capital after selling all securities when blanking, when can descend without material in the ore grinding storehouse of part hole capital after selling all securities, input to the actual discharge quantity (WI) on the conveyer belt of conveyer will significantly reduce, thus make actual discharge quantity (WI) moment significantly depart from control discharge quantity, cause ore grinding storehouse discharge quantity uneven, inaccurate, finally cause ore milling product granularity unstable.

Summary of the invention

The embodiment of the present application technical problem to be solved is, there is provided the method and apparatus that many ore grindings storehouse blanking in a kind of grinding process controls, to solve conventionally as the vibrofeeder in each ore grinding storehouse arranges identical vibration frequency and cause the technical problem of uneven, the inaccurate and ore milling product granularity instability of ore grinding storehouse blanking.

First aspect, the embodiment of the present application provides a kind of method that in grinding process, the blanking of many ore grindings storehouse controls, and the method comprises:

The actual discharge quantity current according to grinding process determines the reference oscillation frequency that current blanking controls;

Detect the actual material level in each ore grinding storehouse, and according to the actual material level in each ore grinding storehouse, calculate the Frequency regulation factor in each ore grinding storehouse; Wherein, the ore grinding storehouse that actual material level is less, Frequency regulation factor is less;

By the product of the Frequency regulation factor in each ore grinding storehouse and described reference oscillation frequency, be defined as the intended vibratory frequency of the vibrofeeder in each ore grinding storehouse.

Optionally, the described actual material level according to each ore grinding storehouse, calculates the Frequency regulation factor in each ore grinding storehouse, is specially:

Calculate the ratio between the actual material level in each ore grinding storehouse and benchmark material level, as the Frequency regulation factor in each ore grinding storehouse.

Optionally, the described actual material level according to each ore grinding storehouse, calculates the Frequency regulation factor in each ore grinding storehouse, comprising:

Calculate the ratio between the actual material level in each ore grinding storehouse and benchmark material level, as each ore grinding storehouse wait revise adjustment factor;

To judge in the nearest unusual determination cycle whether grinding process meets blanking and to be obstructed condition; The described blanking condition of being obstructed represents: the actual discharge quantity in the described abnormality detection cycle is in stable state, and the reference oscillation frequency in the described abnormality detection cycle is in fluctuation status;

If so, then according to preset correction value increase each ore grinding storehouse wait revise adjustment factor, obtain the Frequency regulation factor in each ore grinding storehouse;

If not, then wait that revising adjustment factor is defined as the Frequency regulation factor in each ore grinding storehouse by each ore grinding storehouse.

Optionally, whether the actual discharge quantity of described judgement within a nearest abnormality detection cycle and reference oscillation frequency meet blanking is obstructed condition, comprising:

Calculate the first discharge quantity average, the second discharge quantity average, first frequency average and second frequency average; Wherein, described first discharge quantity average is the mean value of all actual discharge quantity in the nearest unusual determination cycle, described second discharge quantity average is the mean value of all actual discharge quantity in nearest half unusual determination cycle, described first frequency average is the mean value of all reference oscillation frequencies in the nearest unusual determination cycle, and described second frequency average is the mean value of all reference oscillation frequencies in nearest half unusual determination cycle;

Calculate the ratio of difference and described first discharge quantity average between described first discharge quantity average and the second discharge quantity average, as discharge quantity change ratio, and the ratio calculating difference and described first frequency average between described first frequency average and second frequency average is determined, as change of frequency ratio;

Judge whether that described discharge quantity change ratio is greater than the first proportion threshold value and described change of frequency ratio is less than the second proportion threshold value;

If so, then to determine in the nearest unusual determination cycle that grinding process meets blanking and to be obstructed condition;

If not, then determine that in the nearest unusual determination cycle, the discontented foot of grinding process expects condition of being obstructed.

Optionally, described according to preset correction value increase each ore grinding storehouse wait revise adjustment factor, before obtaining the adjustment factor in each ore grinding storehouse, also comprise:

Judge whether the actual material level in all ore grinding storehouses is all less than default control material level;

If so, then perform the described correction value according to presetting increase each ore grinding storehouse wait revise adjustment factor, obtain the Frequency regulation factor in each ore grinding storehouse;

If not, then perform and described each ore grinding storehouse waited that revising adjustment factor is defined as the Frequency regulation factor in each ore grinding storehouse.

Optionally, the described actual material level according to each ore grinding storehouse, after calculating the Frequency regulation factor in each ore grinding storehouse, also comprises:

Judge whether the moment that current time distance each ore grinding storehouse current vibration frequency last changes reaches the current adjustment constraint cycle, if, then perform described by the product of the Frequency regulation factor in each ore grinding storehouse and described reference oscillation frequency, be defined as the intended vibratory frequency of the vibrofeeder in each ore grinding storehouse.

Optionally, described benchmark material level is 70% of the maximum material level in described ore grinding storehouse.

Second aspect, the embodiment of the present application provides the device that in a kind of grinding process, the blanking of many ore grindings storehouse controls, and comprising:

Reference frequency module, determines for the actual discharge quantity current according to grinding process the reference oscillation frequency that current blanking controls; ;

Coefficients calculation block, for detecting the actual material level in each ore grinding storehouse, and according to the actual material level in each ore grinding storehouse, calculates the Frequency regulation factor in each ore grinding storehouse; Wherein, the ore grinding storehouse that actual material level is less, Frequency regulation factor is less;

Target frequency module, for the product by the Frequency regulation factor in each ore grinding storehouse and described reference oscillation frequency, is defined as the intended vibratory frequency of the vibrofeeder in each ore grinding storehouse.

Optionally, described coefficients calculation block, specifically for calculating the ratio between the actual material level in each ore grinding storehouse and benchmark material level, as the Frequency regulation factor in each ore grinding storehouse.

Optionally, described coefficients calculation block, specifically comprises:

Treat correction factor submodule, for calculating the ratio between the actual material level in each ore grinding storehouse and benchmark material level, as each ore grinding storehouse wait revise adjustment factor;

Be obstructed judgement submodule, for judging in the nearest unusual determination cycle whether grinding process meets blanking and to be obstructed condition; The described blanking condition of being obstructed represents: the actual discharge quantity in the described abnormality detection cycle is in stable state, and the reference oscillation frequency in the described abnormality detection cycle is in fluctuation status;

First adjustment factor submodule, for when the judged result of the described judge module that is obstructed is for being, according to preset correction value increase each ore grinding storehouse wait revise adjustment factor, obtain the Frequency regulation factor in each ore grinding storehouse;

By each ore grinding storehouse, second adjustment factor submodule, for when the judged result of the described judge module that is obstructed is no, waits that revising adjustment factor is defined as the Frequency regulation factor in each ore grinding storehouse.

Optionally, described in be obstructed judgement submodule, specifically comprise:

Mean value computation submodule, for calculating the first discharge quantity average, the second discharge quantity average, first frequency average and second frequency average; Wherein, described first discharge quantity average is the mean value of all actual discharge quantity in the nearest unusual determination cycle, described second discharge quantity average is the mean value of all actual discharge quantity in nearest half unusual determination cycle, described first frequency average is the mean value of all reference oscillation frequencies in the nearest unusual determination cycle, and described second frequency average is the mean value of all reference oscillation frequencies in nearest half unusual determination cycle;

Ratio calculating sub module, for calculating the ratio of difference and described first discharge quantity average between described first discharge quantity average and the second discharge quantity average, as discharge quantity change ratio, and the ratio calculating difference and described first frequency average between described first frequency average and second frequency average is determined, as change of frequency ratio;

Ratio judges submodule, for judging whether that described discharge quantity change ratio is greater than the first proportion threshold value and described change of frequency ratio is less than the second proportion threshold value;

First result of determination submodule, for when described ratio judges the judged result of submodule for being, then to determine in the nearest unusual determination cycle that grinding process meets blanking and to be obstructed condition;

Second result of determination submodule, for judging that the judged result of submodule is no in described ratio, determines that in the nearest unusual determination cycle, the discontented foot of grinding process expects condition of being obstructed.

Optionally, described coefficients calculation block also comprises:

Material controlling judges submodule, for when described be obstructed judge the judged result of submodule for being, judge whether the actual material level in all ore grinding storehouses is all less than default control material level;

First triggers module, for when described material controlling judges the judged result of submodule for being, triggers described first adjustment factor submodule;

Second triggers module, for judging that the judged result of submodule is no at described material controlling, triggers described second adjustment factor submodule.

Optionally, also comprise:

Constraint judge module, after starting in described coefficients calculation block, judges whether the moment that current time distance each ore grinding storehouse current vibration frequency last changes reaches the adjustment constraint cycle;

Frequency trigger module, for when the judged result of described constraint judge module is for being, triggers described target frequency module.

Optionally, described benchmark material level is 70% of the maximum material level in described ore grinding storehouse.

Compared with prior art, the application has the following advantages:

The technical scheme of the embodiment of the present application, what adopt is, using the vibration frequency determined according to actual discharge quantity as reference oscillation frequency, and the Frequency regulation factor in each ore grinding storehouse is calculated according to each actual material level in ore grinding storehouse, again using the product of the Frequency regulation factor in each ore grinding storehouse and reference oscillation frequency as the intended vibratory frequency of the vibrofeeder in each ore grinding storehouse, wherein, the ore grinding storehouse that actual material level is less, Frequency regulation factor is less.Intended vibratory frequency due to each ore grinding storehouse vibrofeeder is no longer all identical reference oscillation frequency, but with the Frequency regulation factor of the actual material level calculating in each ore grinding storehouse gained, reference oscillation frequency is regulated, thus the ore grinding storehouse intended vibratory frequency making actual material level lower is less, blanking velocity is slower, the ore grinding storehouse of reducing low actual material level occurs that when blanking the actual discharge quantity of the situation of hole capital after selling all securities would not significantly reduce in blanking process, thus reduce the situation significantly departing from because the actual discharge quantity in ore grinding storehouse is instantaneous and control discharge quantity, make ore grinding storehouse discharge quantity evenly, more accurate, ore milling product granularity is more stable.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is that the equipment relating to blanking in grinding process forms schematic diagram;

Fig. 2 is the flow chart of the embodiment of the method 1 that the blanking of many ore grindings storehouse controls in grinding process in the application;

Fig. 3 is the flow chart of the flow chart of Frequency regulation factor one embodiment calculating each ore grinding storehouse in the embodiment of the present application;

Fig. 4 judges in the embodiment of the present application that grinding process blanking is obstructed the flow chart of an embodiment of state;

Fig. 5 is the structure chart of the device embodiment 1 that the blanking of many ore grindings storehouse controls in grinding process in the application;

Fig. 6 is the structure chart of an embodiment of coefficients calculation block 502 in the embodiment of the present application;

Fig. 7 is the structure chart of the embodiment judging submodule 602 of being obstructed in the embodiment of the present application;

Fig. 8 is the structure chart of the another embodiment of coefficients calculation block 502 in the embodiment of the present application;

Fig. 9 is the structure chart of the device embodiment 2 that the blanking of many ore grindings storehouse controls in grinding process in the application.

Detailed description of the invention

The application's scheme is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.

Inventor finds through research, and why prior art can still have the situation of mineral aggregate in empty and all the other ore grinding storehouses, generating portion ore grinding storehouse, and what reason was that prior art adopts is for the vibration frequency of each ore grinding storehouse vibrofeeder setting is all identical.In fact, because mineral aggregate size is uneven, and the distribution of each feed bin Mineral Material size is inconsistent, each ore grinding storehouse can be caused under identical vibration frequency to have slightly different blanking velocities, each ore grinding storehouse adopts identical vibration frequency that the actual material level in each ore grinding storehouse will be made after some time to produce very big difference, so also just inevitably make the ore grinding storehouse of low actual material level prior to the ore grinding storehouse hole capital after selling all securities of the actual material level of height and without material can under.

Based on the discovery of above-mentioned research, the main thought of the application is: no longer using the reference oscillation frequency determined according to current actual discharge quantity directly as the vibration frequency in each ore grinding storehouse, but be each ore grinding storehouse calculated rate adjustment factor according to the actual material level in each ore grinding storehouse, with the Frequency regulation factor in each ore grinding storehouse, reference oscillation frequency is regulated again, using the current vibration frequency of the intended vibratory frequency after adjustment as each ore grinding storehouse, wherein, the ore grinding storehouse that actual material level is lower, its Frequency regulation factor is less.Vibration frequency due to each ore grinding storehouse is decided by the actual material level in ore grinding storehouse, and the higher vibration frequency of actual material level is larger, and blanking velocity is faster; The lower vibration frequency of actual material level is less, and blanking velocity is slower; Each ore grinding storehouse so just can be reduced to adopt identical vibration frequency and the low actual material level ore grinding storehouse caused prior to the actual material level of height ore grinding storehouse hole capital after selling all securities and there is the situation of hole capital after selling all securities when blanking.

Below in conjunction with accompanying drawing, described in detail the specific implementation of the method and apparatus that the blanking of many ore grindings storehouse controls in the application's grinding process by embodiment.

See Fig. 2, show the flow chart of the embodiment of the method 1 that the blanking of many ore grindings storehouse controls in grinding process in the application.The present embodiment can comprise the following steps:

S201, the actual discharge quantity current according to grinding process determine the reference oscillation frequency that current blanking controls.

Due to the mineral aggregate in ore grinding storehouse by vibrofeeder by blanking on the conveyer belt of conveyer, so the actual discharge quantity in ore grinding storehouse can be obtained the detection of mass flow by material flow detection device on a conveyor, wherein, material flow detection device can be such as belt conveyer scale, and each discharge quantity, mass flow can refer to the weight of mineral aggregate.Wherein, can be every a fixing sampling period to the detection of mass flow, just detect once, such as, detection per second mass flow be also preserved.In addition, the mass flow detected can adopt the mode of database to preserve.

In the present embodiment, the mass flow detected in each moment can directly as the actual discharge quantity that this moment is current, but causes actual discharge quantity to there is fluctuation when vibration frequency is constant due to mineral aggregate meeting not of uniform size.In order to obtain the error reducing this fluctuation and bring, current actual discharge quantity also can be calculated by following formula:

WI=a ₁×WI _end+a ₂×WI _mid+a ₃×WI _start；

Wherein, WI is current actual discharge quantity, WI _endfor the mass flow that current time detects, WI _startfor the mean value of all mass flows detected in a nearest sense cycle, WI _midfor the mean value of all mass flows detected in nearest half sense cycle, a ₁~ a ₃be respectively the first to the 3rd weight coefficient and a ₁>a ₂>a ₃.Such as, getting current time first 60 seconds is sense cycle, then WI _startfor the mean value of mass flow in nearest 60 seconds, WI _midfor the mean value of mass flow in nearest 30 seconds; Wherein, a ₁0.2, a can be preferably ₂0.3, a can be preferably ₃can 0.5 be preferably.

It should be noted that, reference oscillation frequency can adopt multiple different mode when determining.

The first determines that the mode of reference oscillation frequency can be determine current reference oscillation frequency according to current actual discharge quantity in real time, and wherein, as long as current actual discharge quantity changes, then current reference oscillation frequency also can ensue change.

But in practice, because mineral aggregate meeting not of uniform size causes actual discharge quantity to there is fluctuation when vibration frequency is constant, reference oscillation frequency is determined in real time according to actual discharge quantity, current base vibration frequency then can be caused to occur fluctuation on a large scale, next will depart from control discharge quantity by the actual discharge quantity of this reference oscillation FREQUENCY CONTROL.

In order to avoid actual discharge quantity fluctuates the impact brought, the mode of the second determination reference oscillation frequency can be first calculate actual discharge quantity to depart from the deviation ratio controlling discharge quantity, then the number range determination present confinement cycle belonging to described deviation ratio, if time when current time changes apart from last reference oscillation frequency exceedes the present confinement cycle, then utilize deviation ratio to redefine current reference oscillation frequency, if time when current time changes apart from last reference oscillation frequency does not exceed the present confinement cycle, then current reference oscillation frequency remains unchanged.Wherein, deviation ratio can adopt following formulae discovery:

$P=\frac{|{\mathrm{WI}}_0-\mathrm{WI}|}{{\mathrm{WI}}_0};$

In above formula, WI is current discharge quantity, WI ₀for controlling discharge quantity, P is deviation ratio.In addition, deviation ratio also can represent with the percentage of P.

The deviation ratio larger to affiliated number range, adopts the longer present confinement cycle.Such as, using P as deviation ratio, when P >=0.5, the present confinement cycle can be 4T, as 0.2<P<0.5, the first present confinement cycle can be 3T, when 0.1<P≤0.2, the present confinement cycle can be 2T, and when P≤0.1, the present confinement cycle can be T.Wherein, T can be preferably 100 seconds.

In addition, utilizing deviation ratio to redefine current reference oscillation frequency, such as, also can be carry out according to the number range belonging to deviation ratio:

(1) if the absolute value of described deviation ratio belongs to the first proportion, current reference oscillation frequency such as can be calculated by following formula:

$\mathrm{SI}=\mathrm{SI}+b_1\&times;\frac{({\mathrm{WI}}_0-\mathrm{WI})}{|{\mathrm{WI}}_0-\mathrm{WI}|}\&times;P\&times;\mathrm{SI};$

Wherein, SI is current base vibration frequency, b ₁be the first predetermined coefficient, P is deviation ratio, and WI is current actual discharge quantity, WI ₀for controlling discharge quantity; Such as, b ₁can 1/3 be preferably;

(2) if the absolute value of described deviation ratio belongs to the second proportion, current reference oscillation frequency such as can be calculated by following formula:

$\mathrm{SI}=\mathrm{SI}+b_2\&times;\frac{({\mathrm{WI}}_0-\mathrm{WI})}{|{\mathrm{WI}}_0-\mathrm{WI}|}\&times;P\&times;\mathrm{SI};$

Wherein, SI is current base vibration frequency, b ₂be the second predetermined coefficient, P is deviation ratio, and WI is current actual discharge quantity, WI ₀for controlling discharge quantity; Such as, b ₂can 1/2 be preferably;

(3) if the absolute value of described deviation ratio belongs to the 3rd proportion, current reference oscillation frequency such as can be calculated by following formula:

$\mathrm{SI}=\mathrm{SI}+b_3\&times;\frac{({\mathrm{WI}}_0-\mathrm{WI})}{|{\mathrm{WI}}_0-\mathrm{WI}|}\&times;P\&times;\mathrm{SI};$

Wherein, SI is current base vibration frequency, b ₃be the 3rd predetermined coefficient, P is deviation ratio, and WI is current actual discharge quantity, WI ₀for controlling discharge quantity; Such as, b ₃can 1 be preferably;

(4) if the absolute value of described deviation ratio belongs to the 4th proportion, current reference oscillation frequency such as can be calculated by following formula:

$\mathrm{SI}=\mathrm{SI}+b_4\&times;\frac{({\mathrm{WI}}_0-\mathrm{WI})}{|{\mathrm{WI}}_0-\mathrm{WI}|}\&times;P\&times;\mathrm{SI};$

Wherein, SI is current base vibration frequency, and P is deviation ratio, and WI is current actual discharge quantity, WI ₀for controlling discharge quantity; Such as, b ₄can 1 be preferably;

(5) if the absolute value of described deviation ratio belongs to the 5th proportion, then current reference oscillation frequency is constant.

In these five kinds of modes of above-mentioned (1) ~ (5), described first proportion to described 5th proportion reduces successively, and described first predetermined coefficient can increase to the 4th predetermined coefficient successively and all be not more than 1.Such as, first proportion can be P >=0.5, second proportion can be 0.2<P<0.5,3rd proportion can be 0.1<P≤0.2,4th proportion can be 0.02<P≤0.1, and the 5th proportion can be P≤0.02.

S202, detect the actual material level in each ore grinding storehouse, and according to the actual material level in each ore grinding storehouse, calculate the Frequency regulation factor in each ore grinding storehouse; Wherein, the ore grinding storehouse that actual material level is less, Frequency regulation factor is less.

The material level in ore grinding storehouse, generally refers to the height of ore grinding storehouse Mineral Material, can be detected by level-sensing device.In the present embodiment, can arrange benchmark material level calculated rate adjustment factor compared with actual material level, this benchmark material level can pre-set.Such as, the benchmark material level in each ore grinding storehouse can be 70% of this maximum material level in ore grinding storehouse.

When calculated rate adjustment factor, a kind of possible account form is: calculate the ratio between the actual material level in each ore grinding storehouse and benchmark material level, as the Frequency regulation factor in each ore grinding storehouse.Such as, the Frequency regulation factor in each ore grinding storehouse can be calculated by following formula:

$a_i=\frac{L_i}{L_{i-\mathrm{set}}};$

Wherein, a _ibe the Frequency regulation factor in i-th ore grinding storehouse, L _ibe the actual material level in i-th ore grinding storehouse, L _i-setit is the benchmark material level in i-th ore grinding storehouse.Wherein, each ore grinding storehouse if identical, then the L in each ore grinding storehouse _i-setcan be equal.

It should be noted that, in the blanking process in ore grinding storehouse, sometimes excessive mineral aggregate ore can make the blanking in ore grinding storehouse be obstructed.In order to the ore enabling these excessive is successfully from discharging opening blanking, the vibration frequency of ore grinding storehouse rock feeder suitably can be increased on original basis.In conjunction with this consideration, when calculated rate adjustment factor, another kind of possible account form can be as waiting to revise adjustment factor using the ratio of actual material level and benchmark material level, if it is determined that grinding process is in blanking and is obstructed state, then increase and wait that revising adjustment factor obtains Frequency regulation factor, increases to make the intended vibratory frequency in each ore grinding storehouse of final gained.Particularly, calculate the flow chart of Frequency regulation factor one embodiment in each ore grinding storehouse as shown in Figure 3 in the present embodiment, present embodiment can comprise:

S301, calculate ratio between the actual material level in each ore grinding storehouse and benchmark material level, as each ore grinding storehouse wait revise adjustment factor.

S302, to judge in the nearest unusual determination cycle whether grinding process meets blanking and to be obstructed condition, if enter S303, enters S304 if not; The described blanking condition of being obstructed represents: the actual discharge quantity in the described abnormality detection cycle is in stable state, and the reference oscillation frequency in the described abnormality detection cycle is in fluctuation status.

Wherein, can be judged by the situation of change of the actual discharge quantity in the unusual determination cycle and reference oscillation frequency for the be obstructed state of condition of grinding process blanking.Wherein, the unusual determination cycle can be a predetermined time period, a nearest unusual determination cycle is then the time period that distance current time is no more than predetermined time period, such as, a nearest unusual determination cycle can be first 1 minute, first 5 minutes, first 10 minutes, first 30 minutes of current time etc.

In the present embodiment, a kind of possible decision procedure of being obstructed, the variance of actual discharge quantity and reference oscillation frequency in the unusual determination cycle can be utilized to represent that change place situation belongs to stable state or fluctuation status, if the variance of actual discharge quantity is less than first variance threshold value, illustrates and be in stable state, the variance of reference oscillation frequency is greater than again second variance threshold value and then illustrates and be in fluctuation status.Another kind of possible decision procedure of being obstructed can be by the mean bias ratio in two distance current time different time sections to represent that change is in stable state or fluctuation status, particularly, shown in Figure 4, can complete S302 by following steps:

S401, calculate the first discharge quantity average, the second discharge quantity average, first frequency average and second frequency average.

Wherein, described first discharge quantity average is the mean value of all actual discharge quantity in the nearest unusual determination cycle, described second discharge quantity average is the mean value of all actual discharge quantity in nearest half unusual determination cycle, described first frequency average is the mean value of all reference oscillation frequencies in the nearest unusual determination cycle, and described second frequency average is the mean value of all reference oscillation frequencies in nearest half unusual determination cycle.

Wherein, a nearest unusual determination cycle can be preferably first 20 minutes of current time, then corresponding nearest half unusual determination cycle can be preferably first 10 minutes of current time.

S402, calculate the ratio of difference and described first discharge quantity average between described first discharge quantity average and the second discharge quantity average, as discharge quantity change ratio, and the ratio calculating difference and described first frequency average between described first frequency average and second frequency average is determined, as change of frequency ratio.

Wherein, discharge quantity change ratio and change of frequency ratio can calculate respectively by following two formulas:

$P_w=\frac{|{\mathrm{WI}}_{\mathrm{whole}}-{\mathrm{WI}}_{\mathrm{ha}}|}{{\mathrm{WI}}_{\mathrm{whole}}},$ $P_s=\frac{|{\mathrm{SI}}_{\mathrm{whole}}-{\mathrm{SI}}_{\mathrm{ha}}|}{{\mathrm{SI}}_{\mathrm{whole}}};$

Wherein, P _wfor discharge quantity change ratio, WI _wholebe the first discharge quantity average, WI _habe the second discharge quantity average, P _sfor change of frequency ratio, SI _wholefor first frequency average, SI _hafor second frequency average.

S403, judge whether that described discharge quantity change ratio is greater than the first proportion threshold value and described change of frequency ratio is less than the second proportion threshold value, if enter S404, if otherwise enter S405.

Wherein, the first proportion threshold value can be preferably 0.05, and the second proportion threshold value can be preferably 0.02.

Be understandable that, when judging, first can judge whether discharge quantity change ratio is greater than the first proportion threshold value, if more then determination frequency change ratio whether be less than the second proportion threshold value, or, also first determination frequency change ratio the second proportion threshold value can whether be less than, if then judge whether discharge quantity change ratio is greater than the first proportion threshold value again.In the present embodiment, the order that both judge can not circumscribed.

S404, to determine in the nearest unusual determination cycle that grinding process meets blanking and to be obstructed condition.

S405, to determine in the nearest unusual determination cycle that the discontented foot material of grinding process is obstructed condition.

Then return Fig. 3, be understandable that, after S404 is complete, then can enters S303 and perform, after S405 is complete, then can enters S304 and perform.

S303, according to preset correction value increase each ore grinding storehouse wait revise adjustment factor, obtain the Frequency regulation factor in each ore grinding storehouse.

Wherein, preset correction value can be a constant being greater than zero, each ore grinding storehouse treat that correction factor is all added with this correction value the adjustment factor obtaining each ore grinding storehouse, such as this correction value can be 0.1, specifically can be expressed as a _i=a _i'+b, wherein, a _irepresent the adjustment factor in i-th ore grinding storehouse, a _i' represent i-th ore grinding storehouse treat correction factor, b represents default correction value; Or the correction value preset also can be a proportionality constant being greater than 1, each ore grinding storehouse wait that revising adjustment factor is all multiplied with this correction value and obtains the Frequency regulation factor in each ore grinding storehouse.

S304, each ore grinding storehouse waited that revising adjustment factor is defined as the Frequency regulation factor in each ore grinding storehouse.

It should be noted that, in present embodiment, in the judged result of S302 under being situation, can also before execution S303, judge whether the actual material level in all ore grinding storehouses is all less than default control material level further again, if execution S303 can be being entered again, if otherwise execution S304 can be entered.Through further judging, the situation that whether all ore grinding storehouses all exist blanking and are obstructed can be judged, and only all exist in all ore grinding storehouses to increase when blanking is obstructed and wait to revise adjustment factor, can avoid excessively regulating vibration frequency and the error brought.Wherein, the control material level preset can be preferably 50% of maximum material level.

Then Fig. 2 is returned.

After S202 is complete, directly can enter S203, or, also first can judge whether current time distance each ore grinding storehouse current vibration frequency last institute's elapsed time that changes reaches the current adjustment constraint cycle further, if so, then S203 can be performed, if not, the current vibration frequency that then can maintain each ore grinding storehouse is constant, and the current base vibration frequency that refusal utilizes abovementioned steps to obtain at current time and adjustment factor recalculate the vibration frequency in each ore grinding storehouse.Wherein, the current adjustment constraint cycle can adopt changeless time span, such as, the actual material level in all ore grinding storehouses all can be set to 2T lower than current adjustment constraint cycle during default control material level, the current adjustment constraint cycle of all the other situations can be set to T, wherein, T can be preferably 100 seconds.

S203, by the product of the Frequency regulation factor in each ore grinding storehouse and described reference oscillation frequency, be defined as the intended vibratory frequency of the vibrofeeder in each ore grinding storehouse.

Wherein, the intended vibratory frequency of each ore grinding storehouse vibrofeeder can adopt following formula to calculate:

SI _i=a _i×SI _set；

Wherein, SI _ibe the intended vibratory frequency of i-th ore grinding storehouse vibrofeeder, a _ibe the Frequency regulation factor in i-th ore grinding storehouse, SI _setfor current reference oscillation frequency.

It should be noted that, the vibration frequency of vibrofeeder is actually is undertaken controlling by the motor of vibrofeeder, after S203 determines the intended vibratory frequency in each ore grinding storehouse, then can regulate should the running current of ore grinding storehouse vibrofeeder motor according to each intended vibratory frequency, by the adjustment of running current, the output torque of motor is changed, thus realize the adjustment to vibration frequency.

By the technical scheme of the present embodiment, intended vibratory frequency due to each ore grinding storehouse vibrofeeder is no longer all identical reference oscillation frequency, but with the Frequency regulation factor of the actual material level calculating in each ore grinding storehouse gained, reference oscillation frequency is regulated, thus the ore grinding storehouse intended vibratory frequency making actual material level lower is less, blanking velocity is slower, effectively can avoid the situation just occurring hole capital after selling all securities in the ore grinding storehouse of blanking, reduce the probability that vibrofeeder operates without ore deposit, thus minimizing causes actual discharge quantity moment significantly to depart from the situation controlling discharge quantity because of ore grinding storehouse hole capital after selling all securities, make ore grinding storehouse discharge quantity evenly, more accurate, ore milling product granularity is more stable.

Corresponding to embodiment of the method, the embodiment of the present application additionally provides the device that in a kind of grinding process, the blanking of many ore grindings storehouse controls.

See Fig. 5, show the structure chart of the device embodiment 1 that the blanking of many ore grindings storehouse controls in grinding process in the application.In the present embodiment, described device can comprise:

Reference frequency module 501, determines for the actual discharge quantity current according to grinding process the reference oscillation frequency that current blanking controls;

Coefficients calculation block 502, for detecting the actual material level in each ore grinding storehouse, and according to the actual material level in each ore grinding storehouse, calculates the Frequency regulation factor in each ore grinding storehouse; Wherein, the ore grinding storehouse that actual material level is less, Frequency regulation factor is less;

Target frequency module 503, for the product by the Frequency regulation factor in each ore grinding storehouse and described reference oscillation frequency, is defined as the intended vibratory frequency of the vibrofeeder in each ore grinding storehouse.

In the first possible embodiment of the present embodiment, described coefficients calculation block 502, specifically for calculating the ratio between the actual material level in each ore grinding storehouse and benchmark material level, as the Frequency regulation factor in each ore grinding storehouse.

In the embodiment that the second of the present embodiment is possible, see Fig. 6, described coefficients calculation block 502, specifically can comprise:

Treat correction factor submodule 601, for calculating the ratio between the actual material level in each ore grinding storehouse and benchmark material level, as each ore grinding storehouse wait revise adjustment factor;

Be obstructed and judge submodule 602, for judging in the nearest unusual determination cycle whether grinding process meets blanking and to be obstructed condition; The described blanking condition of being obstructed represents: the actual discharge quantity in the described abnormality detection cycle is in stable state, and the reference oscillation frequency in the described abnormality detection cycle is in fluctuation status;

First adjustment factor submodule 603, for when the judged result of the described judge module 602 that is obstructed is for being, according to preset correction value increase each ore grinding storehouse wait revise adjustment factor, obtain the Frequency regulation factor in each ore grinding storehouse;

By each ore grinding storehouse, second adjustment factor submodule 604, for when the judged result of the described judge module 602 that is obstructed is no, waits that revising adjustment factor is defined as the Frequency regulation factor in each ore grinding storehouse.

In the third possible embodiment of the present embodiment, in conjunction with the embodiment that the second is possible, see Fig. 7, described in be obstructed and judge submodule 602, specifically can comprise:

Mean value computation submodule 701, for calculating the first discharge quantity average, the second discharge quantity average, first frequency average and second frequency average; Wherein, described first discharge quantity average is the mean value of all actual discharge quantity in the nearest unusual determination cycle, described second discharge quantity average is the mean value of all actual discharge quantity in nearest half unusual determination cycle, described first frequency average is the mean value of all reference oscillation frequencies in the nearest unusual determination cycle, and described second frequency average is the mean value of all reference oscillation frequencies in nearest half unusual determination cycle;

Ratio calculating sub module 702, for calculating the ratio of difference and described first discharge quantity average between described first discharge quantity average and the second discharge quantity average, as discharge quantity change ratio, and the ratio calculating difference and described first frequency average between described first frequency average and second frequency average is determined, as change of frequency ratio;

Ratio judges submodule 703, for judging whether that described discharge quantity change ratio is greater than the first proportion threshold value and described change of frequency ratio is less than the second proportion threshold value;

First result of determination submodule 704, for when described ratio judges the judged result of submodule 703 for being, then to determine in the nearest unusual determination cycle that grinding process meets blanking and to be obstructed condition;

Second result of determination submodule 705, for judging that the judged result of submodule 703 is no in described ratio, determines that in the nearest unusual determination cycle, the discontented foot of grinding process expects condition of being obstructed.

In the 4th kind of possible embodiment of the present embodiment, in conjunction with the embodiment that the second is possible, described coefficients calculation block 502 can also comprise:

Material controlling judges submodule 801, for when described be obstructed judge the judged result of submodule 602 for being, judge whether the actual material level in all ore grinding storehouses is all less than default control material level;

First triggers module 802, for when described material controlling judges the judged result of submodule 801 for being, triggers described first adjustment factor submodule 603;

Second triggers module 803, for judging that the judged result of submodule 801 is no at described material controlling, triggers described second adjustment factor submodule 604.

See Fig. 9, show the structure chart of the device embodiment 2 that the blanking of many ore grindings storehouse controls in grinding process in the application.In the present embodiment, except all structures shown in Fig. 5, described device can also comprise:

Constraint judge module 901, after starting in described coefficients calculation block 502, judges whether the moment that current time distance each ore grinding storehouse current vibration frequency last changes reaches the adjustment constraint cycle;

Frequency trigger module 902, for when the judged result of described constraint judge module 901 is for being, triggers described target frequency module 503.

In the 6th kind of possible embodiment of the present embodiment, described benchmark material level is 70% of the maximum material level in described ore grinding storehouse.

By the technical scheme of the present embodiment, intended vibratory frequency due to each ore grinding storehouse vibrofeeder is no longer all identical reference oscillation frequency, but with the Frequency regulation factor of the actual material level calculating in each ore grinding storehouse gained, reference oscillation frequency is regulated, thus the ore grinding storehouse intended vibratory frequency making actual material level lower is less, blanking velocity is slower, effectively can avoid the situation just occurring hole capital after selling all securities in the ore grinding storehouse of blanking, reduce the probability that vibrofeeder operates without ore deposit, thus minimizing causes actual discharge quantity moment significantly to depart from the situation controlling discharge quantity because of ore grinding storehouse hole capital after selling all securities, make ore grinding storehouse discharge quantity evenly, more accurate, ore milling product granularity is more stable.

It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.Term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.

For device embodiment, because it corresponds essentially to embodiment of the method, so relevant part illustrates see the part of embodiment of the method.Device embodiment described above is only schematic, the wherein said module illustrated as separating component can or may not be physically separates, parts as module display can be or may not be physical module, namely can be positioned at a place, or also can be distributed on multiple NE.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.

The above is only the detailed description of the invention of the application; it should be pointed out that for those skilled in the art, under the prerequisite not departing from the application's principle; can also make some improvements and modifications, these improvements and modifications also should be considered as the protection domain of the application.

Claims (14)

1. the method that in grinding process, the blanking of many ore grindings storehouse controls, is characterized in that, comprising:

The actual discharge quantity current according to grinding process determines the reference oscillation frequency that current blanking controls;

Detect the actual material level in each ore grinding storehouse, and according to the actual material level in each ore grinding storehouse, calculate the Frequency regulation factor in each ore grinding storehouse; Wherein, the ore grinding storehouse that actual material level is less, Frequency regulation factor is less;

By the product of the Frequency regulation factor in each ore grinding storehouse and described reference oscillation frequency, be defined as the intended vibratory frequency of the vibrofeeder in each ore grinding storehouse.

2. method according to claim 1, is characterized in that, the described actual material level according to each ore grinding storehouse, calculates the Frequency regulation factor in each ore grinding storehouse, be specially:

Calculate the ratio between the actual material level in each ore grinding storehouse and benchmark material level, as the Frequency regulation factor in each ore grinding storehouse.

3. method according to claim 1, is characterized in that, the described actual material level according to each ore grinding storehouse, calculates the Frequency regulation factor in each ore grinding storehouse, comprising:

Calculate the ratio between the actual material level in each ore grinding storehouse and benchmark material level, as each ore grinding storehouse wait revise adjustment factor;

To judge in the nearest unusual determination cycle whether grinding process meets blanking and to be obstructed condition; The described blanking condition of being obstructed represents: the actual discharge quantity in the described unusual determination cycle is in stable state, and the reference oscillation frequency in the described unusual determination cycle is in fluctuation status;

If so, then according to preset correction value increase each ore grinding storehouse wait revise adjustment factor, obtain the Frequency regulation factor in each ore grinding storehouse;

If not, then wait that revising adjustment factor is defined as the Frequency regulation factor in each ore grinding storehouse by each ore grinding storehouse.

4. method according to claim 3, is characterized in that, whether described judgement grinding process within a nearest unusual determination cycle meets blanking is obstructed condition, comprising:

Calculate the first discharge quantity average, the second discharge quantity average, first frequency average and second frequency average; Wherein, described first discharge quantity average is the mean value of all actual discharge quantity in the nearest unusual determination cycle, described second discharge quantity average is the mean value of all actual discharge quantity in nearest half unusual determination cycle, described first frequency average is the mean value of all reference oscillation frequencies in the nearest unusual determination cycle, and described second frequency average is the mean value of all reference oscillation frequencies in nearest half unusual determination cycle;

Calculate the ratio of difference and described first discharge quantity average between described first discharge quantity average and the second discharge quantity average, as discharge quantity change ratio, and calculate the ratio of difference and described first frequency average between described first frequency average and second frequency average, as change of frequency ratio;

Judge whether that described discharge quantity change ratio is greater than the first proportion threshold value and described change of frequency ratio is less than the second proportion threshold value;

If so, then to determine in the nearest unusual determination cycle that grinding process meets blanking and to be obstructed condition;

If not, then determine that in the nearest unusual determination cycle, the discontented foot of grinding process expects condition of being obstructed.

5. method according to claim 3, is characterized in that, described according to preset correction value increase each ore grinding storehouse wait revise adjustment factor, before obtaining the Frequency regulation factor in each ore grinding storehouse, also comprise:

Judge whether the actual material level in all ore grinding storehouses is all less than default control material level;

If so, then perform the described correction value according to presetting increase each ore grinding storehouse wait revise adjustment factor, obtain the Frequency regulation factor in each ore grinding storehouse;

If not, then perform and described each ore grinding storehouse waited that revising adjustment factor is defined as the Frequency regulation factor in each ore grinding storehouse.

6. method according to claim 1, is characterized in that, the described actual material level according to each ore grinding storehouse, after calculating the Frequency regulation factor in each ore grinding storehouse, also comprises:

Judge whether the moment that current time distance each ore grinding storehouse current vibration frequency last changes reaches the current adjustment constraint cycle, if, then perform described by the product of the Frequency regulation factor in each ore grinding storehouse and described reference oscillation frequency, be defined as the intended vibratory frequency of the vibrofeeder in each ore grinding storehouse.

7. the method according to claim 2 ~ 5 any one, is characterized in that, described benchmark material level is 70% of the maximum material level in described ore grinding storehouse.

8. the device that in grinding process, the blanking of many ore grindings storehouse controls, is characterized in that, comprising:

Reference frequency module, determines for the actual discharge quantity current according to grinding process the reference oscillation frequency that current blanking controls;

Coefficients calculation block, for detecting the actual material level in each ore grinding storehouse, and according to the actual material level in each ore grinding storehouse, calculates the Frequency regulation factor in each ore grinding storehouse; Wherein, the ore grinding storehouse that actual material level is less, Frequency regulation factor is less;

Target frequency module, for the product by the Frequency regulation factor in each ore grinding storehouse and described reference oscillation frequency, is defined as the intended vibratory frequency of the vibrofeeder in each ore grinding storehouse.

9. device according to claim 8, is characterized in that, described coefficients calculation block, specifically for calculating the ratio between the actual material level in each ore grinding storehouse and benchmark material level, as the Frequency regulation factor in each ore grinding storehouse.

10. device according to claim 8, is characterized in that, described coefficients calculation block, specifically comprises:

Treat correction factor submodule, for calculating the ratio between the actual material level in each ore grinding storehouse and benchmark material level, as each ore grinding storehouse wait revise adjustment factor;

Be obstructed judgement submodule, for judging in the nearest unusual determination cycle whether grinding process meets blanking and to be obstructed condition; The described blanking condition of being obstructed represents: the actual discharge quantity in the described unusual determination cycle is in stable state, and the reference oscillation frequency in the described unusual determination cycle is in fluctuation status;

First adjustment factor submodule, for when described be obstructed judge the judged result of submodule for being, according to preset correction value increase each ore grinding storehouse wait revise adjustment factor, obtain the Frequency regulation factor in each ore grinding storehouse;

Second adjustment factor submodule, for when described be obstructed judge that the judged result of submodule is no, each ore grinding storehouse waited that revising adjustment factor is defined as the Frequency regulation factor in each ore grinding storehouse.

11. devices according to claim 10, is characterized in that, described in be obstructed judgement submodule, specifically comprise:

Mean value computation submodule, for calculating the first discharge quantity average, the second discharge quantity average, first frequency average and second frequency average; Wherein, described first discharge quantity average is the mean value of all actual discharge quantity in the nearest unusual determination cycle, described second discharge quantity average is the mean value of all actual discharge quantity in nearest half unusual determination cycle, described first frequency average is the mean value of all reference oscillation frequencies in the nearest unusual determination cycle, and described second frequency average is the mean value of all reference oscillation frequencies in nearest half unusual determination cycle;

Ratio calculating sub module, for calculating the ratio of difference and described first discharge quantity average between described first discharge quantity average and the second discharge quantity average, as discharge quantity change ratio, and calculate the ratio of difference and described first frequency average between described first frequency average and second frequency average, as change of frequency ratio;

Ratio judges submodule, for judging whether that described discharge quantity change ratio is greater than the first proportion threshold value and described change of frequency ratio is less than the second proportion threshold value;

First result of determination submodule, for when described ratio judges the judged result of submodule for being, then to determine in the nearest unusual determination cycle that grinding process meets blanking and to be obstructed condition;

Second result of determination submodule, for judging that the judged result of submodule is no in described ratio, determines that in the nearest unusual determination cycle, the discontented foot of grinding process expects condition of being obstructed.

12. devices according to claim 10, is characterized in that, described coefficients calculation block also comprises:

Material controlling judges submodule, for when described be obstructed judge the judged result of submodule for being, judge whether the actual material level in all ore grinding storehouses is all less than default control material level;

First triggers module, for when described material controlling judges the judged result of submodule for being, triggers described first adjustment factor submodule;

Second triggers module, for judging that the judged result of submodule is no at described material controlling, triggers described second adjustment factor submodule.

13. devices according to claim 8, is characterized in that, also comprise:

Constraint judge module, after starting in described coefficients calculation block, judges whether the moment that current time distance each ore grinding storehouse current vibration frequency last changes reaches the adjustment constraint cycle;

Frequency trigger module, for when the judged result of described constraint judge module is for being, triggers described target frequency module.

14. devices according to claim 9 ~ 12 any one, it is characterized in that, described benchmark material level is 70% of the maximum material level in described ore grinding storehouse.