CN103706469B - The method and apparatus that in a kind of grind grading process, ore slurry pump pit level controls - Google Patents
The method and apparatus that in a kind of grind grading process, ore slurry pump pit level controls Download PDFInfo
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- CN103706469B CN103706469B CN201310724516.6A CN201310724516A CN103706469B CN 103706469 B CN103706469 B CN 103706469B CN 201310724516 A CN201310724516 A CN 201310724516A CN 103706469 B CN103706469 B CN 103706469B
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Abstract
The invention discloses the method and apparatus that in a kind of grind grading process, ore slurry pump pit level controls.The method comprises: obtain first actual liquid level of pump pond when a nearest regulating cycle starts, and obtain second actual liquid level of described pump pond at the end of a nearest regulating cycle; Calculate the changing value of described pump pond pulp volume in a nearest regulating cycle, and, calculate the pulp volume deviate that described current actual liquid level departs from described datum level; Based on the changing value of described pulp volume, calculate the first regulated value of output flow, and based on described pulp volume deviate, calculate the second regulated value of output flow; Regulate with described first regulated value and the described second regulated value output flow current to described pump pond.By the technical scheme of the application, what keep liquid level in pump pond more accurately is stabilized on datum level, makes the grading effect of grind grading process more stable.
Description
Technical field
The application relates to ore smelting control field, particularly relates to the method and apparatus that in a kind of grind grading process, pump pit level 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, whether the granularity directly having influence on ore milling product can be reached suitable granularity, and then impact sorts the quality of process and dressing product.
See Fig. 1, show the course of work of ore mill in a kind of grinding process.Mineral aggregate and water are mixed to ore mill by input respectively, the ore pulp formed after the pulverizing of ore mill exports pump pond again to, ore pulp in pump pond carries out classification process by being pumped to grading plant (being generally cyclone), what overflow in grading plant is the ore pulp meeting particle requirement, enter next stage operation, do not meet the requirements of the grinding returning ball mill and carry out again.Wherein, the mineral slurry flux exported due to leading portion ore mill, the situation real-time change such as overflow and cause the mineral slurry flux in front pump pond to be in the state of real-time change after classification, in pump pond, the liquid level of ore pulp is understood real-time change, is difficult to keep stable, and in pump pond, the instability of liquid level can have a great impact the effect tool of ore pulp classification.When liquid level is too high in pump pond, ore pulp overflow from pump pond is easily caused to go out and cause the loss of ore pulp; When in pump pond, liquid level is too low, air easily enters in pump and causes cavitation erosion, affects the output of pump, thus has influence on the stable of the transfer pressure of grading plant, has a strong impact on the grading effect of grading plant.Visible, in pump pond, liquid level is stablized, and is the necessary condition of grind grading process stabilization.
In order to keep the stable of liquid level in pump pond, what adopt in prior art is regulate the mineral slurry flux that pump pond exports based on the difference between the actual liquid level in current time pump pond and default datum level in real time, is stabilized in datum level to make the liquid level in pump pond.But, be that owing to causing the reason of page height instability in pump pond the mineral slurry flux in pump pond exported to by ore mill not identical with the output flow in pump pond, and pump pond is not generally the cylinder that upper and lower floor space is identical, therefore, the difference of pump pond actual liquid level and datum level can not difference in reflected pump pond between the input flow rate of ore pulp and output flow, do not have corresponding relation between the two, therefore, difference based on actual liquid level and datum level regulates the output flow in pump pond, the adjustment inaccuracy of output flow will be made, thus cause liquid level in pump pond to be difficult to stablize, thus the grading effect of grind grading process is affected.
Summary of the invention
Technical problems to be solved in this application are, the method and apparatus that pump pit level in a kind of grind grading process controls is provided, based on the difference between the actual liquid level in current time pump pond and default datum level, the output flow in pump pond is regulated with carrying out linear correlation in real time and the pump pond output flow that causes regulates coarse technical problem to solve conventionally.
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of method that in grind grading process, pump pit level controls, and the method comprises:
Obtain first actual liquid level of pump pond when a nearest regulating cycle starts, and obtain second actual liquid level of described pump pond at the end of a nearest regulating cycle;
According to the pulp volume that described first actual liquid level and described second actual liquid level are formed respectively in described pump pond, calculate the changing value of described pump pond pulp volume in a nearest regulating cycle; And, according to the pulp volume that the current actual liquid level in the described pump pond detected is formed respectively with the datum level preset in described pump pond, calculate the pulp volume deviate that described current actual liquid level departs from described datum level;
Based on the changing value of described pulp volume, calculate the first regulated value of output flow, and based on described pulp volume deviate, calculate the second regulated value of output flow;
Regulate with described first regulated value and the described second regulated value output flow current to described pump pond.
Optionally, described first actual liquid level is that the liquid level of start time to described pump pond of a described nearest regulating cycle detects the actual liquid level detected value obtained, and described second actual liquid level is that the liquid level of finish time to described pump pond of a described nearest regulating cycle detects the actual liquid level detected value obtained.
Optionally, first actual liquid level of described acquisition pump pond when a nearest regulating cycle starts, comprising:
Using a sense cycle before the start time of a described nearest regulating cycle as the first sense cycle, obtain in described first sense cycle and described pump pond is detected and all actual liquid level detected values of obtaining, and calculate the mean value of all actual liquid level detected values in described first sense cycle, as described first actual liquid level;
Second actual liquid level of described acquisition described pump pond at the end of a nearest regulating cycle, comprising:
Using a sense cycle before the finish time of a described nearest regulating cycle as the second sense cycle, obtain in described second sense cycle and described pump pond is detected and all actual liquid level detected values of obtaining, and all actual liquid levels calculated in described second sense cycle detect the mean value in week, as described second actual liquid level.
Optionally, the described changing value based on described pulp volume, calculates the first regulated value of output flow, comprising:
Judge whether the absolute value of the changing value of described pulp volume is greater than default Volume Changes threshold value;
If so, then regulate the product of scale parameter according to the changing value and first of described pulp volume, determine described first regulated value;
If not, then regulate the product of scale parameter according to the changing value and second of described pulp volume, determine described first regulated value;
Wherein, described first scale parameter is regulated to be greater than described second adjustment scale parameter.
Optionally, described based on described pulp volume deviate, calculate the second regulated value of output flow, comprising:
Judge whether the absolute value of described pulp volume deviate is greater than default volume deviation threshold value;
If so, then regulate the product of scale parameter according to described pulp volume deviate and the 3rd, determine described second regulated value;
If not, then regulate the product of scale parameter according to the changing value and the 4th of described pulp volume, determine described second regulated value;
Wherein, the described 3rd scale parameter is regulated to be greater than described 4th adjustment scale parameter.
Optionally, also comprise:
Obtain the adjustment constraint cycle of current time;
Judge whether moment institute's elapsed time that described current time changes apart from the output flow in last described pump pond reaches the described present confinement cycle more than;
If so, the described step regulated with the output flow that the regulated value of described output flow is current to described pump pond is entered.
Optionally, in the adjustment constraint cycle of described acquisition current time, comprising:
Number range belonging to described current actual liquid level is defined as current level scope;
The adjustment constraint cycle of described current time is determined according to described current level scope; Wherein, it is far away that current level scope departs from default datum level, and the adjustment constraint cycle of described current time is longer.
In addition, the embodiment of the present application additionally provides the device that in a kind of grind grading process, pump pit level controls, and this device comprises:
First liquid level acquisition module, for obtaining first actual liquid level of pump pond when a nearest regulating cycle starts;
Second liquid level acquisition module, for obtaining second actual liquid level of described pump pond at the end of a nearest regulating cycle;
Volume Changes computing module, for the pulp volume formed in described pump pond respectively according to described first actual liquid level and described second actual liquid level, calculates the changing value of described pump pond pulp volume in a nearest regulating cycle;
Volume deviation computing module, for the pulp volume formed in described pump pond respectively with the datum level preset according to the current actual liquid level in the described pump pond detected, calculates the pulp volume deviate that described current actual liquid level departs from described datum level;
First regulated value computing module, for the changing value based on described pulp volume, calculates the regulated value of output flow;
Second regulated value computing module, for based on described pulp volume deviate, calculates the second regulated value of output flow;
Flow-rate adjustment module, for regulating with described first regulated value and the described second regulated value output flow current to described pump pond.
Optionally, described first actual liquid level is that the liquid level of start time to described pump pond of a described nearest regulating cycle detects the actual liquid level detected value obtained, and described second actual liquid level is that the liquid level of finish time to described pump pond of a described nearest regulating cycle detects the actual liquid level detected value obtained.
Optionally, described first liquid level acquisition module comprises:
First detected value obtains submodule, for a sense cycle before the start time of a described nearest regulating cycle as the first sense cycle, obtain in described first sense cycle and described pump pond is detected and all actual liquid level detected values of obtaining;
First liquid level gauge operator module, for calculating the mean value of all actual liquid level detected values in described first sense cycle, as described first actual liquid level;
Described second liquid level acquisition module comprises:
Second detected value obtains submodule, for a sense cycle before the finish time of a described nearest regulating cycle as the second sense cycle, obtain in described second sense cycle and described pump pond is detected and all actual liquid level detected values of obtaining;
Second liquid level gauge operator module, detects the mean value in week, as described second actual liquid level for all actual liquid levels calculated in described second sense cycle.
Optionally, described first regulated value computing module comprises:
Volume Changes judges submodule, for judging whether the absolute value of the changing value of described pulp volume is greater than default Volume Changes threshold value;
First ratio calculating sub module, for when described Volume Changes judging the judged result of submodule for being, regulating the product of scale parameter, determining described first regulated value according to the changing value and first of described pulp volume;
Second ratio calculating sub module, for judging that the judged result of submodule is no in described Volume Changes, regulating the product of scale parameter, determining described first regulated value according to the changing value and second of described pulp volume;
Wherein, described first scale parameter is regulated to be greater than described second adjustment scale parameter.
Optionally, described second regulated value computing module comprises:
Volume deviation judges submodule, for judging whether the absolute value of described pulp volume deviate is greater than default volume deviation threshold value;
3rd ratio calculating sub module, for when the judged result of described volume deviation submodule is for being, regulating the product of scale parameter, determining described second regulated value according to described pulp volume deviate and the 3rd;
4th ratio calculating sub module, for when the judged result of described volume deviation submodule is no, regulates the product of scale parameter, determines described second regulated value according to the changing value and the 4th of described pulp volume;
Wherein, the described 3rd scale parameter is regulated to be greater than described 4th adjustment scale parameter.
Optionally, also comprise:
Constraint cycle acquisition module, for obtaining the adjustment constraint cycle of current time;
Constraint judge module, for judging whether moment institute's elapsed time that described current time changes apart from the output flow in last described pump pond reaches the described present confinement cycle more than;
Regulating trigger module, for when the judged result of described constraint judge module is for being, triggering described Flow-rate adjustment module.
Optionally, described constraint cycle acquisition module comprises:
Current level scope determination submodule, for being defined as current level scope by the number range belonging to described current actual liquid level;
The constraint cycle determines submodule, for determining the adjustment constraint cycle of described current time according to described current level scope; Wherein, it is far away that current level scope departs from default datum level, and the adjustment constraint cycle of described current time is longer.
Compared with prior art, the application has the following advantages:
The technical scheme of the embodiment of the present application, obtains first actual liquid level of pump pond when a nearest regulating cycle starts, and obtains second actual liquid level of described pump pond at the end of a nearest regulating cycle; According to the pulp volume that described first actual liquid level and described second actual liquid level are formed respectively in described pump pond, calculate the changing value of described pump pond pulp volume in a nearest regulating cycle, and according to the pulp volume that the current actual liquid level in the described pump pond detected is formed respectively with the datum level preset in described pump pond, calculate the pulp volume deviate that described current actual liquid level departs from described datum level; Based on the changing value of described pulp volume, calculate the first regulated value of output flow, and based on described pulp volume deviate, calculate the second regulated value of output flow; Regulate with described first regulated value and the described second regulated value output flow current to described pump pond.As can be seen here, two regulated values due to output flow in the embodiment of the present application are the pulp volume deviates that depart from datum level with the changing value of pulp volume and current actual liquid level for benchmark calculates respectively, and the variable quantity of the pulp volume pulp volume in mineral slurry flux injection pump pond in a nearest regulating cycle that to be namely ore mill export and pump pond export the difference between ore pulp, namely pulp volume deviate is the difference of the pulp volume in pump pond corresponding to current actual liquid level and the pulp volume corresponding to the datum level of pump pond, therefore, more accurately the output flow in pump pond can be adjusted to the mineral slurry flux in injection pump pond by calculated first regulated value of the changing value of pulp volume, more accurately the actual liquid level in pump pond can be adjusted to its datum level by calculated second regulated value of pulp volume deviate, thus realize keeping more accurately liquid level in pump pond be stabilized on datum level, make the grading effect of grind grading process 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 the course of work schematic diagram of ore mill in grinding process;
Fig. 2 is the basic flow sheet of the embodiment of the method 1 that pump pit level controls in grind grading process in the application;
Fig. 3 is the schematic diagram of an embodiment of regulating cycle and sense cycle in the embodiment of the present application;
Fig. 4 is the schematic diagram of pump pool structure one embodiment in the embodiment of the present application;
Fig. 5 is the flow chart of the first regulated value one embodiment calculating output flow in the embodiment of the present application;
Fig. 6 is the flow chart of the second regulated value one embodiment calculating output flow in the embodiment of the present application;
Fig. 7 is that in the embodiment of the present application, in grind grading process, pump pit level controls the flow chart of another embodiment;
Fig. 8 is the structure chart of the device embodiment 1 that pump pit level controls in grind grading process in the application;
Fig. 9 is the structure chart of the first liquid level acquisition module 801 1 embodiment in the embodiment of the present application;
Figure 10 is the structure chart of the second liquid level acquisition module 802 1 embodiment in the embodiment of the present application;
Figure 11 is the structure chart of the first regulated value computing module 805 1 embodiment in the embodiment of the present application
Figure 12 is the structure chart of the second regulated value computing module 806 1 embodiment in the embodiment of the present application;
Figure 13 is the structure chart of the device embodiment 2 that pump pit level controls in grind grading process in the application;
Figure 14 is the structure chart retraining cycle acquisition module 1,101 one embodiment in the embodiment of the present 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 long-term research, why inaccurate to the control of pump pit level in prior art, being because prior art regulates pump pond output flow based on the difference between actual liquid level and datum level and realizes pump pit level and control, namely datum level realizing the stable of actual liquid level by being adjusted to by actual liquid level in pump pond.But, in pump pond, level stability is actually and requires that both the input flow rate in pump pond (i.e. ore mill output flow) and output flow (ore slurry pump output flow) are equal, pump pit level is stabilized in difference that datum level is then the pulp volume in requirement pump pond corresponding to actual liquid level and the pulp volume corresponding to the datum level of pump pond, but because pump pond is not generally the cylinder that upper and lower floor space is identical, relation between actual liquid level and datum level can not relation between reflected pump pond input flow rate and output flow, the relation between pulp volume corresponding to actual liquid level and datum level can not be reflected, therefore, the mineral slurry flux that ore mill can be caused to export by the mode that actual liquid level in pump pond is adjusted to datum level is excessively regulated or is regulated inadequate situation relative to the difference of pump pond input flow rate and output flow, thus cause the inaccurate of adjustment.
Research and analyse based on the above-mentioned of inventor, the main thought of the application is: by the changing value of pump pond pulp volume in a nearest regulating cycle and actual liquid level and the pulp volume deviate corresponding in pump pond of datum level, calculate the regulated value of output flow, and regulate with the output flow that this regulated value is current to pump pond.Namely pulp volume changing value due to pump pond is the accumulation of deviation in a nearest regulating cycle between pump pond input flow rate and output flow, the mineral slurry flux that pump pond is exported can regulate based on the difference of pump pond input flow rate and output flow, the mineral slurry flux realized pump pond exports more accurately is adjusted to the mineral slurry flux that pump pond exported to by ore mill, thus realize regulating more accurately pump pond output flow, keep the stable of liquid level in pump pond more accurately.And, because namely pulp volume deviate that actual liquid level and datum level are corresponding in pump pond is actual liquid level is adjusted to pulp volume in the pump pond that changes required for datum level, the mineral slurry flux that pump pond is exported based on the pulp volume needing in pump pond when actual liquid level being adjusted to datum level to change, thus can make on the datum level being stabilized in pump pond of liquid level in pump pond.
It should be noted that, noun " ore mill " involved herein, expression be the grinding attachment used in the grinding process of ore-dressing technique, also can be described as " grinding machine ".Wherein, the technical scheme of the embodiment of the present application is applicable to multiple different grinding attachment, such as ball mill or semi-autogenous mill.
After the basic thought describing the application, below in conjunction with accompanying drawing, described in detail the specific implementation of the method and apparatus that pump pit level controls in the application's grind grading process by embodiment.
See Fig. 2, show the basic flow sheet of the embodiment of the method 1 that pump pit level controls in grind grading process in the application.In the present embodiment, described method such as can comprise the following steps:
S201, first actual liquid level of acquisition pump pond when a nearest regulating cycle starts, and obtain second actual liquid level of described pump pond at the end of a nearest regulating cycle.
Wherein, a nearest regulating cycle can be the time period of the fixing duration taking current time as finish time.Such as, a nearest regulating cycle can be this time period in 10 seconds before current time.
Be understandable that, the first actual liquid level when a nearest regulating cycle starts, be the actual liquid level of the start time of a nearest regulating cycle, similarly, actual liquid level at the end of a nearest regulating cycle, be the actual liquid level of the finish time of a nearest regulating cycle, wherein, the second actual liquid level can be the actual liquid level of current time.It should be noted that, actual liquid level can be detected by the liquid level in the different moment to pump pond and obtain the detected value of actual liquid level, the actual liquid level in each moment can directly adopt this moment to detect the actual liquid level detected value obtained to represent, or, the mean value of all actual liquid level detected values detected also can be adopted in the section sometime at this moment place to represent.It should be noted that, relative to the actual liquid level detected value directly adopting a moment, mean value is adopted to represent the first actual liquid level and the second actual liquid level, the error that can reduce to detect on the impact of the first actual liquid level and the second actual liquid level, make the first actual liquid level and the second actual liquid level more accurate.
Such as, in the first possible embodiment of S201, described first actual liquid level is that the liquid level of start time to described pump pond of a described nearest regulating cycle detects the actual liquid level detected value obtained, and described second actual liquid level is that the liquid level of finish time to described pump pond of a described nearest regulating cycle detects the actual liquid level detected value obtained.
And for example, in the embodiment that the second of S202 is possible, the obtain manner of the first actual liquid level, can comprise: using a sense cycle before the start time of a described nearest regulating cycle as the first sense cycle, obtain in described first sense cycle and described pump pond is detected and all actual liquid level detected values of obtaining, and calculate the mean value of all actual liquid level detected values in described first sense cycle, as described first actual liquid level; Simultaneously, the obtain manner of the second actual liquid level, can comprise: using a sense cycle before the finish time of a described nearest regulating cycle as the second sense cycle, obtain in described second sense cycle and described pump pond is detected and all actual liquid level detected values of obtaining, and all actual liquid levels calculated in described second sense cycle detect the mean value in week, as described second actual liquid level.Wherein, the duration of the first sense cycle is equal with the duration of the second sense cycle, and such as, duration is 20 seconds.Be understandable that, the first sense cycle is different from the finish time of the second sense cycle, and the finish time of the first sense cycle is the start time of a nearest regulating cycle, and the finish time of the second sense cycle is the finish time of a nearest regulating cycle.Each period-luminosity relation as shown in Figure 3, suppose that the duration of regulating cycle and sense cycle is identical, wherein, t0 is current time, the finish time of a nearest regulating cycle and the finish time of the second sense cycle, t1 is the start time of a nearest regulating cycle and the finish time of the first sense cycle, t2 is the start time of the second sense cycle, and t3 is the start time of the first sense cycle.
Then Fig. 2 is returned.After S201 is complete, enter S202.
S202, the pulp volume formed in described pump pond respectively according to described first actual liquid level and described second actual liquid level, calculate the changing value of described pump pond pulp volume in a nearest regulating cycle; And, according to the pulp volume that the current actual liquid level in the described pump pond detected is formed respectively with the datum level preset in described pump pond, calculate the pulp volume deviate that described current actual liquid level departs from described datum level.
It should be noted that, in pump pond, the changing value of pulp volume and pulp volume deviate, relevant with the structure in pump pond, needs the structure in conjunction with pump pond to calculate when calculating.
Wherein, for arbitrary pump pond, the variable quantity of pulp volume can pass through formula (1) and calculate:
ΔV=∫∫dsdl（1）
Wherein, △ V is the changing value of pulp volume, and s represents the area of pump pond at liquid level l place, and such as, when liquid level is 0, the area in pump pond is its floor space.
Such as, Fig. 4 shows a kind of common pump pool structure, and its former and later two sides are inverted trapezoidal, two sides, left and right and upper and lower two bottom surfaces are rectangle, and wherein, the bottom surface length of side is a, b, trapezoidal two hypotenuses and bottom surface angulation are respectively α and β, if the first actual liquid level is l
0, the second actual liquid level is l
1, then the changing value of pulp volume can pass through formula (2) and calculates:
Similar to the changing value of pulp volume, for arbitrary pump pond, pulp volume deviate can be passed through formula (3) and calculate:
ΔP=∫∫dsdl（3）
Wherein, △ P is pulp volume deviate, and s represents the area of pump pond at liquid level l place, and such as, when liquid level is 0, the area in pump pond is its floor space.
In addition, in the pump pool structure shown in Fig. 4, if current actual liquid level is l
t, datum level is l
s, then pulp volume deviate can be passed through formula (4) and calculates:
It should be noted that, if namely current time is the finish time of a nearest regulating cycle, then current actual liquid level can be identical with the second actual liquid level, is all the actual detected value of current time to pump pit level; Certainly, even if namely current time is the finish time of a nearest regulating cycle, current actual liquid level and the second actual liquid level also can be different, and such as, the second actual liquid level can be the mean value of the actual liquid level detected value in a period of time.
S203, changing value based on described pulp volume, calculate the first regulated value of output flow, and based on described pulp volume deviate, calculate the second regulated value of output flow.
Wherein, there is a kind of fixing conversion relation between the changing value of pulp volume and the first regulated value of output flow, this conversion relation is that the duration of a nearest regulating cycle corresponding to the changing value of unit and the pulp volume adopted by the numerical value of output flow determines.Wherein, in this conversion relation, the relation between the first regulated value of output flow and the changing value of pulp volume can be expressed as formula (5):
Δv=k·ΔV（5）
Wherein, △ v is the first regulated value of output flow, and △ V is the changing value of pulp volume, and k is reduced parameter.
Be understandable that, the adjustment of output flow is identical with the change of pulp volume; When pulp volume increases, the changing value of pulp volume is greater than 0, then output flow needs to increase, and the first regulated value of output flow should be greater than 0; When pulp volume reduces, the changing value of pulp volume is less than 0, then output flow needs to reduce, and the first regulated value of output flow should be less than 0.Therefore, the numerical value of k is greater than 0.Such as, if the unit of output flow to be got cube m/h, then the first regulated value of output flow is equivalent to the changing value of pulp volume in 1 hour, and if the duration of a nearest regulating cycle is 10 seconds, then the value of k is 360.
Similar with the changing value of pulp volume, also there is a kind of fixing conversion relation between pulp volume deviate and the second regulated value of output flow.In this conversion relation, the relation between the second regulated value of output flow and pulp volume deviation can be expressed as formula (6):
Δp=k·ΔP（6）
Wherein, △ p is the regulated value of output flow, and △ V is the changing value of pulp volume, and k is reduced parameter.Wherein, if the duration of a nearest regulating cycle is 10 seconds, then the value of k is 360.
It should be noted that, in order to make liquid level more stable, the pulp volume change in pump pond greatly, then can regulate the output flow that pump pond is current by a larger margin, and the change of the pulp volume in pump pond is less, then can regulate the output flow that pump pond is current more by a small margin.For this reason, the present embodiment can also calculate at the changing value based on pulp volume on the basis of the first regulated value, and the changing value size according to pulp volume carries out certain adjustment to the first regulated value.Such as, the first regulated value that formula (7) calculates output flow can be passed through:
Δv=m·k·ΔV（7）
Wherein, m is for regulating scale parameter, and when the changing value of pulp volume is different, m gets different numerical value.
When calculating regulated value based on formula (8), the first regulated value calculating output flow can adopt the mode shown in Fig. 5 particularly, comprising:
S501, judge whether the absolute value of the changing value of described pulp volume is greater than default Volume Changes threshold value; If so, enter S502, if not, enter S503.
Wherein, Volume Changes threshold value can set based on the maximum pulp volume in pump pond, and such as, Volume Changes threshold value can be set as 10% of maximum level.
S502, regulate the product of scale parameter according to the changing value and first of described pulp volume, determine described first regulated value.
S503, regulate the product of scale parameter according to the changing value and second of described pulp volume, determine described first regulated value.
Wherein, described first scale parameter m1 is regulated to be greater than described second adjustment scale parameter m
2.Such as, m
1can be 1/4, m
2can be 1/8.
Then Fig. 2 is returned.
It should be noted that, datum level is adjusted to more quickly in order to make actual liquid level, actual liquid level is more close to the datum level preset, then can regulate the output flow that pump pond is current more by a small margin, and actual liquid level is more away from datum level, then can regulate the output flow that pump pond is current by a larger margin.For this problem, the present embodiment can also calculate on the basis of the second regulated value based on pulp volume deviation value, the size according to pulp volume deviation value carries out certain adjustment to the second regulated value.Such as, the regulated value that formula (8) calculates output flow can be passed through:
Δp=m·k·ΔP（8）
Wherein, m is for regulating scale parameter, and when pulp volume deviation value is different, m gets different numerical value.
When calculating regulated value based on formula (8), the second regulated value calculating output flow can adopt the mode shown in Fig. 6 particularly, comprising:
S601, judge whether the absolute value of described pulp volume deviate is greater than default volume deviation threshold value; If so, enter S602, if not, enter S603.
Wherein, volume deviation threshold value can set based on the maximum pulp volume in pump pond, and such as, volume deviation threshold value can be set as 10% of maximum level.
S602, regulate the product of scale parameter according to described pulp volume deviate and the 3rd, determine described second regulated value;
S603, regulate the product of scale parameter according to the changing value and the 4th of described pulp volume, determine described second regulated value;
Wherein, the described 3rd scale parameter m is regulated
3be greater than the described 4th and regulate scale parameter m
4.Such as, m
3can be 1/2, m
4can be 1/3.
Then Fig. 2 is returned.
S204, to regulate with described first regulated value and the described second regulated value output flow current to described pump pond.
Such as, if adopt aforementioned formula (2) and (7) to calculate the first regulated value, adopt aforementioned formula (4) and (8), formula (9) can be adopted to regulate output flow:
FI=FI+Δv-Δp（9）
Wherein, FI is the current output flow in pump pond, and △ v is the first regulated value, and △ p is the second regulated value.
In the prior art, the mineral slurry flux that pump pond exports regulates in real time based on the actual liquid level detected in real time, but because the output flow after regulating needs the regular hour that actual liquid level just can be made to change, therefore, the mode regulated in real time in prior art regulates too frequent, the excessive adjustment of output flow can be caused, make adjustment inaccurate.In the present embodiment, too frequent in order to avoid regulating, can be that twice continuous print regulates and arrange the constraint cycle, make no longer to regulate in a period of time after each adjustment, after waiting for that actual liquid level puts in place with the output flow change after regulating, then regulate.Particularly, as shown in Figure 7, the present embodiment can also comprise:
The adjustment constraint cycle of S701, acquisition current time.
Wherein, the mode of acquisition can comprise: the number range belonging to described current actual liquid level is defined as current level scope; The adjustment constraint cycle of described current time is determined according to described current level scope; Wherein, it is far away that current level scope departs from default datum level, and the adjustment constraint cycle of described current time is longer.
Such as, when current level scope be superelevation liquid level district or ultralow liquid level district time can adopt the adjustment as current time in 2 seconds retrain the cycle, when current level scope be high liquid level district or low liquid level district time can adopt the adjustment as current time in 5 seconds retrain the cycle, can adopt when current level scope is reasonable liquid level district the adjustment as current time in 10 seconds retrain the cycle.Wherein, if in current actual liquid level > first liquid level in limited time, then current actual liquid level belongs to superelevation liquid level district; If the second liquid level upper limit < current actual liquid level≤the first liquid level upper limit, then current actual liquid level belongs to high liquid level district; If in the second liquid level lower limit≤current actual liquid level≤the second liquid level in limited time, then, current actual liquid level belongs to reasonable liquid level district; If during the first liquid level lower limit≤current actual liquid level < the second liquid level lower limit, then current actual liquid level belongs to low liquid level district; If during current actual liquid level < the first liquid level lower limit, then current actual liquid level belongs to ultralow liquid level district.Wherein, the first liquid level upper limit, the second liquid level upper limit, the second liquid level lower limit and the first liquid level lower limit reduce successively, such as, first upper limit level can be set as 90% of maximum level, second upper limit level can be set as 70% of maximum level, second bottom limit level can be set as 40% of maximum level, and the first bottom limit level can be set as 20% of maximum level.
S702, judge whether moment institute's elapsed time that described current time changes apart from the output flow in last described pump pond reaches the described present confinement cycle more than; If so, S703 is entered.
S703, enter the described step regulated with the output flow that the regulated value of described output flow is current to described pump pond.
By regulating the constraint cycle, the present embodiment can avoid the mineral slurry flux to pump pond exports excessively to regulate, and select the different adjustment constraint cycles based on different current level scopes, can actual liquid level excessive or too small time the adjustment of related frequency is carried out to actual liquid level and at actual liquid level close to carrying out relatively lax adjustment during datum level, thus can effectively avoid when keeping pump pit level stable ore pulp to overflow jumping out and situation that pump pond is vacant occurs.
Then Fig. 2 is returned.
By the technical scheme of the present embodiment, namely variable quantity due to pulp volume is the difference that the pulp volume in mineral slurry flux injection pump pond in a nearest regulating cycle that exports of ore mill and pump pond export between ore pulp, and namely pulp volume deviate is the difference of the pulp volume in pump pond corresponding to current actual liquid level and the pulp volume corresponding to the datum level of pump pond, therefore, more accurately the output flow in pump pond can be adjusted to the mineral slurry flux in injection pump pond by calculated first regulated value of the changing value of pulp volume, more accurately the actual liquid level in pump pond can be adjusted to its datum level by calculated second regulated value of pulp volume deviate, thus keep liquid level in pump pond more accurately be stabilized on datum level, make the grading effect of grind grading process more stable.
Corresponding to embodiment of the method, present invention also provides the device that a kind of ore grinding pump pond output flow controls.
See Fig. 8, show the structure chart of the device embodiment 1 that pump pit level controls in grind grading process in the application.In the present embodiment, described device can comprise:
First liquid level acquisition module 801, for obtaining first actual liquid level of pump pond when a nearest regulating cycle starts;
Second liquid level acquisition module 802, for obtaining second actual liquid level of described pump pond at the end of a nearest regulating cycle;
Volume Changes computing module 803, for the pulp volume formed in described pump pond respectively according to described first actual liquid level and described second actual liquid level, calculates the changing value of described pump pond pulp volume in a nearest regulating cycle;
Volume deviation computing module 804, for the pulp volume formed in described pump pond respectively with the datum level preset according to the current actual liquid level in the described pump pond detected, calculates the pulp volume deviate that described current actual liquid level departs from described datum level;
First regulated value computing module 805, for the changing value based on described pulp volume, calculates the regulated value of output flow;
Second regulated value computing module 806, for based on described pulp volume deviate, calculates the second regulated value of output flow;
Flow-rate adjustment module 807, for regulating with described first regulated value and the described second regulated value output flow current to described pump pond.
Wherein, optionally, described first actual liquid level is that the liquid level of start time to described pump pond of a described nearest regulating cycle detects the actual liquid level detected value obtained, and described second actual liquid level is that the liquid level of finish time to described pump pond of a described nearest regulating cycle detects the actual liquid level detected value obtained.
Wherein, optionally, in one first liquid level acquisition module 801 embodiment as shown in Figure 9, described first liquid level acquisition module 801 can comprise:
First detected value obtains submodule 901, for a sense cycle before the start time of a described nearest regulating cycle as the first sense cycle, obtain in described first sense cycle and described pump pond is detected and all actual liquid level detected values of obtaining;
First liquid level gauge operator module 902, for calculating the mean value of all actual liquid level detected values in described first sense cycle, as described first actual liquid level;
Wherein, optionally, in one second liquid level acquisition module 802 embodiment as shown in Figure 10, described second liquid level acquisition module 802 can comprise:
Second detected value obtains submodule 1001, for a sense cycle before the finish time of a described nearest regulating cycle as the second sense cycle, obtain in described second sense cycle and described pump pond is detected and all actual liquid level detected values of obtaining;
Second liquid level gauge operator module 1002, detects the mean value in week, as described second actual liquid level for all actual liquid levels calculated in described second sense cycle.
Wherein, optionally, in one first regulated value computing module 805 embodiment as shown in figure 11, described first regulated value computing module 805 can comprise:
Volume Changes judges submodule 1101, for judging whether the absolute value of the changing value of described pulp volume is greater than default Volume Changes threshold value;
First ratio calculating sub module 1102, for when described Volume Changes judging the judged result of submodule 1101 for being, regulating the product of scale parameter, determining described first regulated value according to the changing value and first of described pulp volume;
Second ratio calculating sub module 1103, for judging that the judged result of submodule 1101 is no in described Volume Changes, regulating the product of scale parameter, determining described first regulated value according to the changing value and second of described pulp volume;
Wherein, described first scale parameter is regulated to be greater than described second adjustment scale parameter.
Wherein, optionally, in one second regulated value computing module 806 embodiment as shown in figure 12, described second regulated value computing module 806 can comprise:
Volume deviation judges submodule 1201, for judging whether the absolute value of described pulp volume deviate is greater than default volume deviation threshold value;
3rd ratio calculating sub module 1202, for when the judged result of described volume deviation submodule 1201 is for being, regulating the product of scale parameter, determining described second regulated value according to described pulp volume deviate and the 3rd;
4th ratio calculating sub module 1203, for when the judged result of described volume deviation submodule 1201 is no, regulates the product of scale parameter, determines described second regulated value according to the changing value and the 4th of described pulp volume;
Wherein, the described 3rd scale parameter is regulated to be greater than described 4th adjustment scale parameter.
See Figure 13, show the structure chart of the device embodiment 2 that pump pit level controls in grind grading process in the application.In the present embodiment, except all structures shown in Fig. 8, can also comprise:
Constraint cycle acquisition module 1301, for obtaining the adjustment constraint cycle of current time;
Constraint judge module 1302, for judging whether moment institute's elapsed time that described current time changes apart from the output flow in last described pump pond reaches the described present confinement cycle more than;
Regulating trigger module 1303, for when the judged result of described constraint judge module 1302 is for being, triggering described Flow-rate adjustment module 807.
Wherein, optionally, as shown in figure 14, in one constraint cycle acquisition module 1301 embodiment in the present embodiment, described constraint cycle acquisition module 1301 can comprise:
Current level scope determination submodule 1401, for being defined as current level scope by the number range belonging to described current actual liquid level;
The constraint cycle determines submodule 1402, for determining the adjustment constraint cycle of described current time according to described current level scope; Wherein, it is far away that current level scope departs from default datum level, and the adjustment constraint cycle of described current time is longer.
By the device embodiment of the application, more accurately the output flow in pump pond can be adjusted to the mineral slurry flux in injection pump pond by calculated first regulated value of the changing value of pulp volume, more accurately the actual liquid level in pump pond can be adjusted to its datum level by calculated second regulated value of pulp volume deviate, thus keep liquid level in pump pond more accurately be stabilized on datum level, make the grading effect of grind grading process 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 unit illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, 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 grind grading process, pump pit level controls, is characterized in that, comprising:
Obtain first actual liquid level of pump pond when a nearest regulating cycle starts, and obtain second actual liquid level of described pump pond at the end of a nearest regulating cycle;
According to the pulp volume that described first actual liquid level and described second actual liquid level are formed respectively in described pump pond, calculate the changing value of described pump pond pulp volume in a nearest regulating cycle; And, according to the pulp volume that the current actual liquid level in the described pump pond detected is formed respectively with the datum level preset in described pump pond, calculate the pulp volume deviate that described current actual liquid level departs from described datum level;
Based on the changing value of described pulp volume, calculate the first regulated value of output flow, and based on described pulp volume deviate, calculate the second regulated value of output flow;
Regulate with described first regulated value and the described second regulated value output flow current to described pump pond.
2. method according to claim 1, it is characterized in that, described first actual liquid level is that the liquid level of start time to described pump pond of a described nearest regulating cycle detects the actual liquid level detected value obtained, and described second actual liquid level is that the liquid level of finish time to described pump pond of a described nearest regulating cycle detects the actual liquid level detected value obtained.
3. method according to claim 1, is characterized in that, first actual liquid level of described acquisition pump pond when a nearest regulating cycle starts, comprising:
Using a sense cycle before the start time of a described nearest regulating cycle as the first sense cycle, obtain in described first sense cycle and described pump pond is detected and all actual liquid level detected values of obtaining, and calculate the mean value of all actual liquid level detected values in described first sense cycle, as described first actual liquid level;
Second actual liquid level of described acquisition described pump pond at the end of a nearest regulating cycle, comprising:
Using a sense cycle before the finish time of a described nearest regulating cycle as the second sense cycle, obtain in described second sense cycle and described pump pond is detected and all actual liquid level detected values of obtaining, and all actual liquid levels calculated in described second sense cycle detect the mean value in week, as described second actual liquid level.
4. method according to claim 1, is characterized in that, the described changing value based on described pulp volume, calculates the first regulated value of output flow, comprising:
Judge whether the absolute value of the changing value of described pulp volume is greater than default Volume Changes threshold value;
If so, then regulate the product of scale parameter according to the changing value and first of described pulp volume, determine described first regulated value;
If not, then regulate the product of scale parameter according to the changing value and second of described pulp volume, determine described first regulated value;
Wherein, described first scale parameter is regulated to be greater than described second adjustment scale parameter.
5. method according to claim 1, is characterized in that, described based on described pulp volume deviate, calculates the second regulated value of output flow, comprising:
Judge whether the absolute value of described pulp volume deviate is greater than default volume deviation threshold value;
If so, then regulate the product of scale parameter according to described pulp volume deviate and the 3rd, determine described second regulated value;
If not, then regulate the product of scale parameter according to described pulp volume deviate and the 4th, determine described second regulated value;
Wherein, the described 3rd scale parameter is regulated to be greater than described 4th adjustment scale parameter.
6. method according to claim 1, is characterized in that, also comprises:
Obtain the adjustment constraint cycle of current time;
Judge whether moment institute's elapsed time that described current time changes apart from the output flow in last described pump pond reaches the described present confinement cycle more than;
If so, the described step regulated with the output flow that the regulated value of described output flow is current to described pump pond is entered.
7. method according to claim 6, is characterized in that, in the adjustment constraint cycle of described acquisition current time, comprising:
Number range belonging to described current actual liquid level is defined as current level scope;
The adjustment constraint cycle of described current time is determined according to described current level scope; Wherein, it is far away that current level scope departs from default datum level, and the adjustment constraint cycle of described current time is longer.
8. the device that in grind grading process, pump pit level controls, is characterized in that, comprising:
First liquid level acquisition module, for obtaining first actual liquid level of pump pond when a nearest regulating cycle starts;
Second liquid level acquisition module, for obtaining second actual liquid level of described pump pond at the end of a nearest regulating cycle;
Volume Changes computing module, for the pulp volume formed in described pump pond respectively according to described first actual liquid level and described second actual liquid level, calculates the changing value of described pump pond pulp volume in a nearest regulating cycle;
Volume deviation computing module, for the pulp volume formed in described pump pond respectively with the datum level preset according to the current actual liquid level in the described pump pond detected, calculates the pulp volume deviate that described current actual liquid level departs from described datum level;
First regulated value computing module, for the changing value based on described pulp volume, calculates the regulated value of output flow;
Second regulated value computing module, for based on described pulp volume deviate, calculates the second regulated value of output flow;
Flow-rate adjustment module, for regulating with described first regulated value and the described second regulated value output flow current to described pump pond.
9. device according to claim 8, it is characterized in that, described first actual liquid level is that the liquid level of start time to described pump pond of a described nearest regulating cycle detects the actual liquid level detected value obtained, and described second actual liquid level is that the liquid level of finish time to described pump pond of a described nearest regulating cycle detects the actual liquid level detected value obtained.
10. device according to claim 8, is characterized in that, described first liquid level acquisition module comprises:
First detected value obtains submodule, for a sense cycle before the start time of a described nearest regulating cycle as the first sense cycle, obtain in described first sense cycle and described pump pond is detected and all actual liquid level detected values of obtaining;
First liquid level gauge operator module, for calculating the mean value of all actual liquid level detected values in described first sense cycle, as described first actual liquid level;
Described second liquid level acquisition module comprises:
Second detected value obtains submodule, for a sense cycle before the finish time of a described nearest regulating cycle as the second sense cycle, obtain in described second sense cycle and described pump pond is detected and all actual liquid level detected values of obtaining;
Second liquid level gauge operator module, detects the mean value in week, as described second actual liquid level for all actual liquid levels calculated in described second sense cycle.
11. devices according to claim 8, is characterized in that, described first regulated value computing module comprises:
Volume Changes judges submodule, for judging whether the absolute value of the changing value of described pulp volume is greater than default Volume Changes threshold value;
First ratio calculating sub module, for when described Volume Changes judging the judged result of submodule for being, regulating the product of scale parameter, determining described first regulated value according to the changing value and first of described pulp volume;
Second ratio calculating sub module, for judging that the judged result of submodule is no in described Volume Changes, regulating the product of scale parameter, determining described first regulated value according to the changing value and second of described pulp volume;
Wherein, described first scale parameter is regulated to be greater than described second adjustment scale parameter.
12. devices according to claim 8, is characterized in that, described second regulated value computing module comprises:
Volume deviation judges submodule, for judging whether the absolute value of described pulp volume deviate is greater than default volume deviation threshold value;
3rd ratio calculating sub module, for when the judged result of described volume deviation submodule is for being, regulating the product of scale parameter, determining described second regulated value according to described pulp volume deviate and the 3rd;
4th ratio calculating sub module, for when the judged result of described volume deviation submodule is no, regulates the product of scale parameter, determines described second regulated value according to described pulp volume deviate and the 4th;
Wherein, the described 3rd scale parameter is regulated to be greater than described 4th adjustment scale parameter.
13. devices according to claim 8, is characterized in that, also comprise:
Constraint cycle acquisition module, for obtaining the adjustment constraint cycle of current time;
Constraint judge module, for judging whether moment institute's elapsed time that described current time changes apart from the output flow in last described pump pond reaches the described present confinement cycle more than;
Regulating trigger module, for when the judged result of described constraint judge module is for being, triggering described Flow-rate adjustment module.
14. devices according to claim 13, is characterized in that, described constraint cycle acquisition module comprises:
Current level scope determination submodule, for being defined as current level scope by the number range belonging to described current actual liquid level;
The constraint cycle determines submodule, for determining the adjustment constraint cycle of described current time according to described current level scope; Wherein, it is far away that current level scope departs from default datum level, and the adjustment constraint cycle of described current time is longer.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1903442A (en) * | 2006-02-16 | 2007-01-31 | 中国恩菲工程技术有限公司 | Semi-automill ball-milling type ore grinding system and its control system |
| CN101251396A (en) * | 2008-04-02 | 2008-08-27 | 罗放明 | Energy-saving grinder swirler closed-loop system and control method |
| CN201140124Y (en) * | 2007-11-29 | 2008-10-29 | 灵宝市金源矿业有限责任公司 | Return current voltage regulation apparatus of swirl nozzle |
| CN101950171A (en) * | 2010-09-17 | 2011-01-19 | 中冶北方工程技术有限公司 | Intelligent hierarchical control method and control device for ore grinding in concentration plant |
| JP5173238B2 (en) * | 2007-04-13 | 2013-04-03 | 日本コークス工業株式会社 | Crushing method |
-
2013
- 2013-12-24 CN CN201310724516.6A patent/CN103706469B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1903442A (en) * | 2006-02-16 | 2007-01-31 | 中国恩菲工程技术有限公司 | Semi-automill ball-milling type ore grinding system and its control system |
| JP5173238B2 (en) * | 2007-04-13 | 2013-04-03 | 日本コークス工業株式会社 | Crushing method |
| CN201140124Y (en) * | 2007-11-29 | 2008-10-29 | 灵宝市金源矿业有限责任公司 | Return current voltage regulation apparatus of swirl nozzle |
| CN101251396A (en) * | 2008-04-02 | 2008-08-27 | 罗放明 | Energy-saving grinder swirler closed-loop system and control method |
| CN101950171A (en) * | 2010-09-17 | 2011-01-19 | 中冶北方工程技术有限公司 | Intelligent hierarchical control method and control device for ore grinding in concentration plant |
Non-Patent Citations (3)
| Title |
|---|
| 《再磨过程泵池液位区间与给矿压力模糊切换控制》;赵大勇等;《自动化学报》;20121203;第39卷(第5期);第556-561页 * |
| 《石灰浆制备过程计算机控制系统设计与开发》;陈钊;《中国优秀硕士学位论文全文数据库（电子期刊）》;20130315;第12-13页 * |
| 《选矿厂磨矿回路中旋流器和给矿砂泵的控制及调速方式》;杨松荣;《有色矿山》;19930630;第35-38页 * |
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