CN103706470B - The method and apparatus that in a kind of grind grading process, ore slurry pump pit level controls - Google Patents

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 the output flow that the difference of described first regulated value and the second regulated value is 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

Method and device for controlling liquid level of ore pulp pump pool in ore grinding classification process

Technical Field

The application relates to the field of ore smelting control, in particular to a method and a device for controlling the liquid level of a pump pool in an ore grinding and classifying process.

Background

In the production process of ore smelting, because the raw ore obtained by mining cannot meet the smelting requirement, the raw ore needs to be subjected to ore dressing firstly, so that concentrate meeting the smelting requirement is obtained and then used in the smelting process. The mineral processing operation mainly comprises links of crushing and screening, grinding and grading, sorting, concentrate dehydration and the like of raw ores. Wherein the grinding process is to crush the crushed ore to a suitable particle size and to supply the crushed ore to the sorting process. In the process of grinding, as the ore is crushed, the effective mineral components can be dissociated from the gangue, and different effective mineral components can be dissociated from each other. The grinding operation is a key process for providing sorting raw materials, and the control condition of the grinding process directly influences whether the granularity of the ground product can reach the proper granularity or not, so that the sorting process and the quality of the mineral separation product are influenced.

Referring to fig. 1, the operation of an ore mill during grinding is shown. Mineral aggregate and water are respectively put into the ore grinding machine for mixing, the ore pulp formed after the grinding of the ore grinding machine is output to the pump pool, the ore pulp in the pump pool is sent to a grading device (generally a swirler) by a pump for grading treatment, the ore pulp overflowing from the grading device is the ore pulp meeting the particle requirement, the ore pulp enters the next stage of process, and the ore pulp which does not meet the requirement returns to the ball grinding machine for grinding again. The ore pulp flow input into the pump pool is in a real-time changing state due to real-time changes of conditions such as ore pulp flow output by the front-section ore grinding machine and grading rear overflow, the liquid level height of the ore pulp in the pump pool can change in real time and is difficult to keep stable, and the instability of the liquid level height in the pump pool can have great influence on the ore pulp grading effect. When the liquid level in the pump pool is too high, the ore pulp is easy to overflow out of the pump pool to cause the loss of the ore pulp; when the liquid level in the pump pool is too low, air easily enters the pump to cause cavitation erosion and affect the output of the pump, thereby affecting the stability of the grading pressure of the grading device and seriously affecting the grading effect of the grading device. Therefore, the liquid level in the pump pool is stable, which is a necessary condition for the stability of the ore grinding and grading process.

In order to keep the stability of the liquid level in the pump pool, the prior art adopts the method that the pulp flow output by the pump pool is adjusted in real time based on the difference value between the actual liquid level of the pump pool at the current moment and the preset reference liquid level, so that the liquid level in the pump pool is stabilized at the reference liquid level. However, the reason for causing the height of the page in the pump pool to be unstable is that the ore pulp flow output to the pump pool by the ore mill is different from the output flow of the pump pool, and the pump pool is generally not a cylinder with the same upper and lower bottom areas, so that the difference value between the actual liquid level of the pump pool and the reference liquid level cannot reflect the difference value between the input flow and the output flow of the ore pulp in the pump pool, and the difference value does not have a corresponding relation between the actual liquid level and the reference liquid level.

Disclosure of Invention

The technical problem to be solved by the application is to provide a method and a device for controlling the liquid level of a pump pool in the ore grinding classification process, so as to solve the technical problem that the output flow of the pump pool is regulated linearly and correlatively to cause inaccurate regulation of the output flow of the pump pool according to the difference value between the actual liquid level of the pump pool at the current moment and the preset reference liquid level in real time in the prior art.

In order to solve the technical problem, an embodiment of the present application provides a method for controlling a liquid level of a pump pool in a grinding and classifying process, where the method includes:

acquiring a first actual liquid level of a pump pool at the beginning of a latest adjusting period, and acquiring a second actual liquid level of the pump pool at the end of the latest adjusting period;

calculating the change value of the pulp volume of the pump pool in the latest adjusting period according to the pulp volumes formed in the pump pool by the first actual liquid level and the second actual liquid level respectively; calculating ore pulp volume deviation values of the current actual liquid level deviating from the reference liquid level according to the detected ore pulp volumes formed in the pump pool by the current actual liquid level of the pump pool and the preset reference liquid level respectively;

calculating a first regulating value of output flow based on the change value of the pulp volume, and calculating a second regulating value of output flow based on the pulp volume deviation value;

and adjusting the current output flow of the pump pool by the difference value of the first adjusting value and the second adjusting value.

Optionally, the first actual liquid level is an actual liquid level detection value obtained by detecting the liquid level of the pump sump at the starting time of the last adjustment period, and the second actual liquid level is an actual liquid level detection value obtained by detecting the liquid level of the pump sump at the ending time of the last adjustment period.

Optionally, the obtaining a first actual liquid level of the pump sump at the beginning of the last adjustment period includes:

taking a detection period before the starting time of the latest adjustment period as a first detection period, acquiring all actual liquid level detection values obtained by detecting the pump pool in the first detection period, and calculating the average value of all actual liquid level detection values in the first detection period as the first actual liquid level;

the obtaining a second actual liquid level of the pump sump at the end of the last adjustment period comprises:

and taking a detection period before the end time of the latest adjusting period as a second detection period, acquiring all actual liquid level detection values obtained by detecting the pump pool in the second detection period, and calculating the average value of all actual liquid level detection periods in the second detection period as the second actual liquid level.

Optionally, the calculating a first adjustment value of an output flow based on the change value of the pulp volume includes:

judging whether the absolute value of the change value of the pulp volume is larger than a preset volume change threshold value or not;

if yes, determining the first adjusting value according to the product of the change value of the pulp volume and a first adjusting proportion parameter;

if not, determining the first adjusting value according to the product of the change value of the ore pulp volume and a second adjusting proportion parameter;

wherein the first adjustment ratio parameter is greater than the second adjustment ratio parameter.

Optionally, calculating a second adjustment value of the output flow based on the pulp volume deviation value includes:

judging whether the absolute value of the pulp volume deviation value is larger than a preset first volume deviation threshold value or not;

if so, determining the second adjusting value according to the product of the pulp volume deviation value and a third adjusting proportion parameter;

if not, determining the second adjusting value according to the product of the change value of the ore pulp volume and a fourth adjusting proportion parameter;

wherein the third adjustment ratio parameter is greater than the fourth adjustment ratio parameter.

Optionally, the method further includes:

acquiring the current actual ore pulp concentration of the pump pool;

judging whether the current actual ore pulp concentration and the current actual liquid level of the pump pool meet concentration regulation conditions or not; the concentration adjusting conditions are that the current actual ore pulp concentration is greater than a preset concentration upper limit value and the current actual liquid level is greater than the reference liquid level, or the current actual ore pulp concentration is less than a preset concentration lower limit value and the current actual liquid level is less than the reference liquid level; wherein the upper concentration limit is greater than the lower concentration limit;

if so, adjusting the water adding amount of the pump pool by taking the second adjusting value as the adjusting value of the water adding amount.

Optionally, the method further includes:

acquiring an adjustment constraint period at the current moment;

judging whether the time elapsed from the current moment to the moment when the output flow of the pump pool changes last time reaches the current constraint period or not;

if yes, the current output flow of the pump pool is adjusted by the adjusting value of the output flow.

Optionally, the obtaining of the adjustment constraint period at the current time includes:

judging whether the absolute value of the pulp volume deviation value is larger than a preset second volume deviation threshold value or not;

if so, taking the first time length as an adjustment constraint period of the current time;

if not, taking the second time length as the regulation constraint period of the current time;

wherein the first duration is less than the second duration.

In addition, this application embodiment still provides a device of pump pond liquid level control in the ore grinding classification process, and the device includes:

the first liquid level acquisition module is used for acquiring a first actual liquid level of the pump pool at the beginning of the latest adjusting period;

the second liquid level acquisition module is used for acquiring a second actual liquid level of the pump pool at the end of the latest adjusting period;

the volume change calculation module is used for calculating the change value of the pulp volume of the pump pool in the latest adjusting period according to the pulp volumes formed in the pump pool by the first actual liquid level and the second actual liquid level respectively;

the volume deviation calculation module is used for calculating the ore pulp volume deviation value of the current actual liquid level deviating from the reference liquid level according to the detected ore pulp volumes formed in the pump pool by the current actual liquid level of the pump pool and the preset reference liquid level;

the first adjusting value calculating module is used for calculating an adjusting value of output flow based on the change value of the pulp volume;

the second adjusting value calculating module is used for calculating a second adjusting value of output flow based on the pulp volume deviation value;

and the flow regulating module is used for regulating the current output flow of the pump pool by using the difference value of the first regulating value and the second regulating value.

Optionally, the first actual liquid level is an actual liquid level detection value obtained by detecting the liquid level of the pump sump at the starting time of the last adjustment period, and the second actual liquid level is an actual liquid level detection value obtained by detecting the liquid level of the pump sump at the ending time of the last adjustment period.

Optionally, the first liquid level obtaining module includes:

a first detection value acquisition submodule, configured to take a detection period before a start time of the latest adjustment period as a first detection period, and acquire all actual liquid level detection values obtained by detecting the pump pool in the first detection period;

the first liquid level calculation submodule is used for calculating the average value of all actual liquid level detection values in the first detection period to serve as the first actual liquid level;

the second liquid level acquisition module includes:

a second detection value acquisition submodule, configured to take a detection period before an end time of the latest adjustment period as a second detection period, and acquire all actual liquid level detection values obtained by detecting the pump pool in the second detection period;

and the second liquid level calculation submodule is used for calculating the average value of all the actual liquid level detection cycles in the second detection period as the second actual liquid level.

Optionally, the first adjustment value calculating module includes:

the volume change judgment submodule is used for judging whether the absolute value of the change value of the ore pulp volume is larger than a preset volume change threshold value or not;

the first proportion calculation submodule is used for determining a first adjusting value according to the product of the change value of the ore pulp volume and a first adjusting proportion parameter under the condition that the judgment result of the volume change judgment submodule is yes;

the second proportion calculation submodule is used for determining the first adjusting value according to the product of the change value of the ore pulp volume and a second adjusting proportion parameter under the condition that the judgment result of the volume change judgment submodule is negative;

wherein the first adjustment ratio parameter is greater than the second adjustment ratio parameter.

Optionally, the second adjustment value calculating module includes:

the first deviation judgment submodule is used for judging whether the absolute value of the pulp volume deviation value is larger than a preset first volume deviation threshold value or not;

the third proportion calculation submodule is used for determining the second adjusting value according to the product of the pulp volume deviation value and a third adjusting proportion parameter under the condition that the judgment result of the first deviation submodule is yes;

the fourth proportion calculation submodule is used for determining the second adjusting value according to the product of the change value of the ore pulp volume and a fourth adjusting proportion parameter under the condition that the judgment result of the first deviation submodule is negative;

wherein the third adjustment ratio parameter is greater than the fourth adjustment ratio parameter.

Optionally, the method further includes:

the current concentration acquisition module is used for acquiring the current actual ore pulp concentration of the pump pool;

the adjusting condition judging module is used for judging whether the current actual ore pulp concentration and the current actual liquid level of the pump pool meet the water adding amount adjusting condition or not; the water adding amount adjusting condition is that the current actual ore pulp concentration is greater than a preset concentration upper limit value and the current actual liquid level is greater than the reference liquid level, or the current actual ore pulp concentration is less than a preset concentration lower limit value and the current actual liquid level is less than the reference liquid level; wherein the upper concentration limit is greater than the lower concentration limit;

and the water adding amount adjusting module is used for adjusting the water adding amount of the pump pool by taking the second adjusting value as the adjusting value of the water adding amount under the condition that the judging condition of the adjusting condition module is yes.

Optionally, the method further includes:

the constraint period acquisition module is used for acquiring the adjustment constraint period at the current moment;

the constraint judging module is used for judging whether the time elapsed from the moment when the output flow of the pump pool changes at the last time reaches the current constraint period or not;

and the regulation triggering module is used for triggering the flow regulation module under the condition that the judgment result of the constraint judgment module is yes.

Optionally, the constraint period obtaining module includes:

the second deviation judgment submodule is used for judging whether the absolute value of the pulp volume deviation value is larger than a preset second volume deviation threshold value or not;

a first period determining submodule, configured to take a first time length as an adjustment constraint period of the current time when a determination result of the second deviation determining submodule is yes;

a second period determining submodule, configured to, when a determination result of the second deviation determining submodule is negative, use a second duration as an adjustment constraint period of the current time;

wherein the first duration is less than the second duration.

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

according to the technical scheme of the embodiment of the application, a first actual liquid level of a pump pool at the beginning of the latest adjusting period is obtained, and a second actual liquid level of the pump pool at the end of the latest adjusting period is obtained; calculating the change value of the pulp volume of the pump pool in the latest adjusting period according to the pulp volumes formed in the pump pool by the first actual liquid level and the second actual liquid level respectively, and calculating the pulp volume deviation value of the current actual liquid level deviating from the reference liquid level according to the detected pulp volumes formed in the pump pool by the current actual liquid level of the pump pool and a preset reference liquid level respectively; calculating a first regulating value of output flow based on the change value of the pulp volume, and calculating a second regulating value of output flow based on the pulp volume deviation value; and adjusting the current output flow of the pump pool by the difference value of the first adjusting value and the second adjusting value. Therefore, as the two regulating values of the output flow in the embodiment of the application are respectively calculated by taking the variation value of the pulp volume and the pulp volume deviation value of the current actual liquid level from the reference liquid level as references, the variation of the pulp volume is the difference value between the pulp volume of the pulp output by the ore grinder and the pulp output by the pump pool in the latest regulating period, and the pulp volume deviation value is the difference value between the pulp volume corresponding to the current actual liquid level in the pump pool and the pulp volume corresponding to the reference liquid level in the pump pool, the first regulating value calculated by the variation value of the pulp volume can more accurately regulate the output flow of the pump pool to the pulp flow injected into the pump pool, and the second regulating value calculated by the pulp volume deviation value can more accurately regulate the actual liquid level of the pump pool to the reference liquid level thereof, thereby more accurately keeping the liquid level height in the pump pool stable on the reference liquid level, so that the grading effect in the grinding and grading process is more stable.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of an operational process of an ore mill during an ore milling process;

FIG. 2 is a basic flowchart of embodiment 1 of the method for controlling the liquid level of the pump sump in the ore grinding classification process according to the present application;

FIG. 3 is a schematic diagram of one embodiment of an adjustment cycle and a detection cycle in the examples of the present application;

FIG. 4 is a schematic diagram of an embodiment of a pump sump structure in an example of the present application;

FIG. 5 is a flow chart of one embodiment of calculating a first adjustment value for output flow in an example of the present application;

FIG. 6 is a flow chart of one embodiment of calculating a second adjustment value for output flow in an example of the present application;

FIG. 7 is a flow chart of another embodiment of the liquid level control of the pump pool in the ore grinding classification process in the embodiment of the present application;

FIG. 8 is a flow chart of a further embodiment of the liquid level control of the pump sump during the ore grinding classification in the example of the present application;

FIG. 9 is a view showing the constitution of an embodiment 1 of the apparatus for controlling the liquid level of a pump bath in the classification of grinding in the present application;

fig. 10 is a structural diagram of an implementation manner of a first liquid level obtaining module 901 in the embodiment of the present application;

fig. 11 is a structural diagram of an implementation manner of the second liquid level obtaining module 902 in the embodiment of the present application;

FIG. 12 is a block diagram of an embodiment of a first adjustment value calculating module 905 in the embodiment of the present application

FIG. 13 is a block diagram of an embodiment of a second adjustment value calculation module 906 in an example of the present application;

FIG. 14 is a view showing the constitution of an embodiment 2 of the apparatus for controlling the liquid level of a pump bath in the classification of grinding in the present application;

FIG. 15 is a view showing the constitution of an embodiment 3 of the apparatus for controlling the liquid level of a pump bath in the classification of grinding in the present application;

fig. 16 is a structural diagram of an embodiment of a constraint period acquisition module 1501 in the embodiment of the present application.

Detailed Description

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The inventor finds that the control of the liquid level of the pump pool in the prior art is inaccurate due to the fact that the prior art realizes the control of the liquid level of the pump pool by adjusting the output flow of the pump pool based on the difference value between the actual liquid level and the reference liquid level, namely, the actual liquid level in the pump pool is adjusted to the reference liquid level to realize the stability of the actual liquid level. However, the fact that the liquid level in the pump sump is stable requires that the input flow (i.e., mill output flow) and output flow (slurry pump output flow) of the pump sump are both equal, the stabilization of the liquid level of the pump pool at the reference liquid level is the difference value between the ore pulp volume corresponding to the actual liquid level in the pump pool and the ore pulp volume corresponding to the reference liquid level of the pump pool, however, because the pump tank is not a column with the same upper and lower bottom areas, the relationship between the actual liquid level and the reference liquid level cannot reflect the relationship between the input flow and the output flow of the pump tank, nor the relationship between the actual liquid level and the pulp volume corresponding to the reference liquid level, thus, adjusting the actual level in the pump sump to the reference level can result in an excessive or insufficient adjustment of the slurry flow rate at the mill output relative to the difference between the input flow rate and the output flow rate of the pump sump, resulting in inaccurate adjustment.

Based on the above research analysis of the inventor, the main idea of the present application is: and calculating the regulating value of the output flow through the change value of the pulp volume of the pump pool in the latest regulating period and the pulp volume deviation value corresponding to the actual liquid level and the reference liquid level in the pump pool, and regulating the current output flow of the pump pool by the regulating value. The ore pulp volume change value of the pump pool is the accumulation of the deviation between the input flow and the output flow of the pump pool in the latest adjusting period, so that the ore pulp flow output by the pump pool can be adjusted based on the difference value of the input flow and the output flow of the pump pool, the ore pulp flow output by the pump pool is adjusted to the ore pulp flow output by the ore mill to the pump pool more accurately, the output flow of the pump pool is adjusted more accurately, and the stability of the liquid level height in the pump pool is maintained more accurately. And because the corresponding ore pulp volume deviation value of the actual liquid level and the reference liquid level in the pump pool is the ore pulp volume in the pump pool which is required to change the actual liquid level to the reference liquid level, the ore pulp flow output by the pump pool can be based on the ore pulp volume which is required to change in the pump pool when the actual liquid level is regulated to the reference liquid level, and the liquid level height in the pump pool is stabilized on the reference liquid level of the pump pool.

It should be noted that the term "ore mill" as used herein refers to an ore grinding device used in an ore grinding process of an ore dressing process, and may also be referred to as a "mill". The technical scheme of the embodiment of the application is suitable for various different ore grinding equipment, such as a ball mill or a semi-automatic mill.

After the basic idea of the present application is introduced, the following detailed description will be made, by way of example, with reference to the accompanying drawings, of a specific implementation of the method and apparatus for controlling the liquid level of a pump sump during a grinding classification process according to the present application.

Referring to fig. 2, there is shown a basic flow chart of the method embodiment 1 of the pump pit liquid level control in the ore grinding classification process in the present application. In this embodiment, the method may include, for example, the steps of:

s201, acquiring a first actual liquid level of a pump pool at the beginning of a latest adjusting period, and acquiring a second actual liquid level of the pump pool at the end of the latest adjusting period.

The last adjustment cycle may be a time period of a fixed duration with the current time as the end time. For example, the last adjustment cycle may be a time period of 10 seconds before the current time.

It is understood that the first actual level at the beginning of the last regulation cycle, i.e. the actual level at the beginning of the last regulation cycle, and similarly the actual level at the end of the last regulation cycle, i.e. the actual level at the end of the last regulation cycle, wherein the second actual level may be the actual level at the current moment. It should be noted that the actual liquid level may be detected at different times to obtain a detection value of the actual liquid level, and the actual liquid level at each time may be directly represented by the actual liquid level detection value detected at the time, or may be represented by an average value of all the actual liquid level detection values detected within a certain time period at the time. It should be noted that, for directly adopting the actual liquid level detection value at a moment, the average value is adopted to represent the first actual liquid level and the second actual liquid level, so that the influence of the detection error on the first actual liquid level and the second actual liquid level can be reduced, and the first actual liquid level and the second actual liquid level are more accurate.

For example, in a first possible implementation manner of S201, the first actual fluid level is a detected actual fluid level value obtained by detecting the fluid level of the pump sump at the beginning time of the last adjustment cycle, and the second actual fluid level is a detected actual fluid level value obtained by detecting the fluid level of the pump sump at the end time of the last adjustment cycle.

For another example, in the second possible implementation manner of S202, the obtaining manner of the first actual liquid level may include: taking a detection period before the starting time of the latest adjustment period as a first detection period, acquiring all actual liquid level detection values obtained by detecting the pump pool in the first detection period, and calculating the average value of all actual liquid level detection values in the first detection period as the first actual liquid level; meanwhile, the obtaining mode of the second actual liquid level may include: and taking a detection period before the end time of the latest adjusting period as a second detection period, acquiring all actual liquid level detection values obtained by detecting the pump pool in the second detection period, and calculating the average value of all actual liquid level detection periods in the second detection period as the second actual liquid level. The duration of the first detection period is equal to the duration of the second detection period, for example, the duration is 20 seconds. It will be appreciated that the first detection period is different from the end of the second detection period, the end of the first detection period being the start of the last adjustment period and the end of the second detection period being the end of the last adjustment period. The relationship of the periods shown in fig. 3 assumes that the durations of the adjustment period and the detection period are the same, where t0 is the current time, the end time of the last adjustment period and the end time of the second detection period, t1 is the start time of the last adjustment period and the end time of the first detection period, t2 is the start time of the second detection period, and t3 is the start time of the first detection period.

And then returns to fig. 2. After the execution of S201 is completed, the process proceeds to S202.

S202, calculating the change value of the pulp volume of the pump pool in the latest adjusting period according to the pulp volumes formed in the pump pool by the first actual liquid level and the second actual liquid level respectively; and calculating the pulp volume deviation value of the current actual liquid level deviating from the reference liquid level according to the pulp volume formed by the detected current actual liquid level of the pump pool and the preset reference liquid level in the pump pool respectively.

It should be noted that the variation value of the pulp volume in the pump sump and the pulp volume deviation value are related to the structure in the pump sump, and the calculation needs to be performed in combination with the structure of the pump sump.

Wherein, for any pump pool, the change of the pulp volume can be calculated by the formula (1):

ΔV=∫∫dsdl（1）

where Δ V is a variation value of the pulp volume, and s represents an area of the pump tank at the liquid level l, for example, the area of the pump tank when the liquid level is 0 is the bottom area of the pump tank.

For example, fig. 4 shows a common pump pool structure, in which the front and rear sides are inverted trapezoids, and the left and right sides and the upper and lower bottom surfaces are rectangles, wherein the sides of the bottom surfaces have a length a and b, and the angles formed by the two oblique sides of the trapezoids and the bottom surface are α and β, respectively, if the first actual liquid level is l₀The second actual liquid level is l₁Then the change value of the pulp volume can be calculated by formula (2):

$\mathrm{\ΔV}=\underset{l_0}{\overset{l_1}{\∫}}(\frac{l}{\tan \mathrm{\α}}+\frac{l}{\tan \mathrm{\β}}+a)\·b\·\mathrm{dl}---\left(2\right)$

similar to the variation value of the pulp volume, for any pump cell, the pulp volume deviation value can be calculated by equation (3):

ΔP=∫∫dsdl（3）

where Δ P is the pulp volume deviation value, and s represents the area of the pump pool at the liquid level l, for example, the area of the pump pool when the liquid level is 0 is the bottom area of the pump pool.

Further, in the pump sump structure shown in FIG. 4, if the current actual liquid level is l_tThe reference liquid level is l_sThen the pulp volume deviation value can be calculated by equation (4):

$\mathrm{\ΔP}=\underset{l_t}{\overset{l_s}{\∫}}(\frac{l}{\tan \mathrm{\α}}+\frac{1}{\tan \mathrm{\β}}+a)\·b\·\mathrm{dl}---\left(4\right)$

it should be noted that, if the current time is the end time of the latest adjustment cycle, the current actual liquid level and the second actual liquid level may be the same and are both the actual detection values of the liquid level of the pump pool at the current time; of course, the current actual level may be different from the second actual level even if the current time instant is the end time instant of the last adjustment cycle, e.g. the second actual level may be an average of the detected values of the actual levels over a period of time.

S203, calculating a first adjusting value of output flow based on the change value of the pulp volume, and calculating a second adjusting value of the output flow based on the pulp volume deviation value.

And the conversion relation is determined by the unit adopted by the numerical value of the output flow and the time length of the latest adjusting period corresponding to the change value of the pulp volume. In the conversion relation, the relation between the first adjusting value of the output flow and the change value of the pulp volume can be expressed as formula (5):

Δv=k·ΔV（5）

wherein, Deltav is a first adjusting value of the output flow, DeltaV is a change value of the pulp volume, and k is a conversion parameter.

It will be appreciated that the regulation of the output flow is the same as the change in slurry volume; when the volume of the ore pulp is increased and the change value of the volume of the ore pulp is larger than 0, the output flow needs to be increased, and the first adjusting value of the output flow is larger than 0; when the volume of the ore pulp is reduced, the change value of the volume of the ore pulp is smaller than 0, the output flow needs to be reduced, and the first adjusting value of the output flow should be smaller than 0. Therefore, the value of k is greater than 0. For example, if the output flow rate is in cubic meters per hour, the first adjustment value of the output flow rate is equivalent to the change value of the pulp volume in 1 hour, and if the time length of the last adjustment period is 10 seconds, the value of k is 360.

Similar to the variation value of the pulp volume, a fixed conversion relation also exists between the pulp volume deviation value and the second regulating value of the output flow. In the conversion relation, the relation between the second regulating value of the output flow and the pulp volume deviation can be expressed as formula (6):

Δp=k·ΔP（6）

wherein, the delta p is an adjusting value of output flow, the delta V is a change value of the pulp volume, and the k is a conversion parameter. Wherein, if the time length of the last adjusting period is 10 seconds, the value of k is 360.

It should be noted that, in order to make the liquid level more stable, the larger the change of the pulp volume of the pump pool is, the larger the adjustment of the current output flow rate of the pump pool is, and the smaller the change of the pulp volume of the pump pool is, the smaller the adjustment of the current output flow rate of the pump pool is. For this reason, the embodiment may also perform a certain adjustment on the first adjustment value according to the magnitude of the change value of the pulp volume on the basis of calculating the first adjustment value based on the change value of the pulp volume. For example, the first adjustment value of the output flow rate can be calculated by equation (7):

Δv=m·k·ΔV（7）

wherein m is a parameter for adjusting the proportion, and m takes different values under the condition that the change values of the pulp volume are different.

When calculating the adjustment value based on equation (7), calculating the first adjustment value of the output flow rate may specifically adopt the manner shown in fig. 5, including:

s501, judging whether the absolute value of the change value of the ore pulp volume is larger than a preset volume change threshold value or not; if yes, the process proceeds to S502, and if no, the process proceeds to S503.

Wherein the volume change threshold may be set based on the maximum slurry volume in the pump tank, e.g. the volume change threshold may be set to 10% of the maximum liquid level.

S502, determining the first adjusting value according to the product of the change value of the pulp volume and a first adjusting proportion parameter.

S503, determining the first adjusting value according to the product of the change value of the pulp volume and a second adjusting proportion parameter.

Wherein the first adjustment scale parameter m₁Is greater than the second regulation ratio parameter m₂. E.g. m₁Can be 1/4 m₂May be 1/8.

And then returns to fig. 2.

It should be noted that, in order to adjust the actual liquid level to the reference liquid level more quickly, the closer the actual liquid level is to the preset reference liquid level, the smaller the current output flow rate of the pump pool can be adjusted, and the farther the actual liquid level is from the reference liquid level, the larger the current output flow rate of the pump pool can be adjusted. In response to this problem, the present embodiment may further perform a certain adjustment on the second adjustment value according to the magnitude of the pulp volume deviation value based on the calculation of the second adjustment value based on the pulp volume deviation value. For example, the adjustment value of the output flow rate can be calculated by equation (8):

Δp=m·k·ΔP（8）

wherein m is a parameter for adjusting the proportion, and m takes different values under the condition that the ore pulp volume deviation values are different.

When calculating the adjustment value based on equation (8), the second adjustment value for calculating the output flow rate may specifically adopt the manner shown in fig. 6, including:

s601, judging whether the absolute value of the pulp volume deviation value is larger than a preset first volume deviation threshold value or not; if yes, the process proceeds to S602, and if no, the process proceeds to S603.

Wherein the first volume deviation threshold may be set based on the maximum slurry volume in the pump tank, e.g. the second volume deviation threshold may be set to 10% of the maximum liquid level.

S602, determining the second adjusting value according to the product of the pulp volume deviation value and a third adjusting proportion parameter;

s603, determining the second adjusting value according to the product of the change value of the pulp volume and a fourth adjusting proportion parameter;

wherein the third adjustment ratio parameter m₃Is greater than the fourth regulation ratio parameter m₄. E.g. m₃Can be 1/2 m₄May be 1/3.

And then returns to fig. 2.

And S204, adjusting the current output flow of the pump pool according to the difference value of the first adjusting value and the second adjusting value.

For example, if the first adjustment value is calculated using the aforementioned equations (2) and (7), the output flow rate can be adjusted using the aforementioned equations (4) and (8) using equation (9):

FI_out=FI_out+Δv-Δp（9）

wherein, FI_out△ v is the first adjustment value and △ p is the second adjustment value for the current output flow of the pump.

It should be noted that, referring to the operation of the mill shown in fig. 1, the slurry in the pump tank is mixed by adding water to the slurry output from the mill. The water is added into the pump pool to adjust the concentration of the ore pulp in the pump pool, so that the concentration of the ore pulp in the pump pool can be controlled by adjusting the water adding amount of the pump pool. In this embodiment, the second adjustment value calculated from the pulp volume deviation value may be used to adjust the water addition amount of the pump sump in addition to the output flow rate of the pump sump. Specifically, as shown in fig. 7, the present embodiment may further include:

and S701, acquiring the current actual ore pulp concentration of the pump pool.

Wherein, the current actual pulp concentration can be detected and obtained by a concentration detection device on the pump pool.

S702, judging whether the current actual ore pulp concentration and the current actual liquid level of the pump pool meet concentration regulation conditions or not, and if so, entering S703.

The concentration adjusting conditions are that the current actual ore pulp concentration is greater than a preset concentration upper limit value and the current actual liquid level is less than the reference liquid level, or the current actual ore pulp concentration is less than a preset concentration lower limit value and the current actual liquid level is greater than the reference liquid level; wherein the upper concentration limit is greater than the lower concentration limit.

It should be noted that, for the comparison between the current actual liquid level and the reference liquid level in the concentration adjustment condition, one possible implementation may be to compare the current actual liquid level and the reference liquid level, or another possible implementation may be to determine the magnitude relationship between the current actual liquid level and the reference liquid level by the positive or negative of the calculated pulp volume deviation value, for example, when the pulp volume deviation value is calculated by the foregoing formula (4), it indicates that the current actual liquid level is less than the reference liquid level when the pulp volume deviation value is less than 0, and it indicates that the current actual liquid level is greater than the reference liquid level when the pulp volume deviation value is greater than 0.

And S703, adjusting the water adding amount of the pump pool by taking the second adjusting value as the adjusting value of the water adding amount.

For example, if the foregoing equations (4) and (8) are employed, then the output flow may be adjusted using equation (10):

FI_l-in=FI_l-in+Δp（10）

wherein,FI_l-in△ v is the first regulating value and △ p is the second regulating value for the current water adding amount of the pump pool.

And then returns to fig. 2.

In prior art, the ore pulp flow of pump sump output is based on real-time detection's actual liquid level and real-time regulation, but because the output flow after the regulation needs certain time just can make the actual liquid level change, consequently, the mode of real-time regulation among the prior art is adjusted too frequently, can cause the excessive regulation of output flow for adjust inaccurately. In this embodiment, in order to avoid too frequent adjustment, a constraint period may be set for two consecutive adjustments, so that no adjustment is performed within a period of time after each adjustment, and adjustment is performed after the actual liquid level changes in place along with the output flow after adjustment. Specifically, as shown in fig. 7, the present embodiment may further include:

s801, obtaining the adjustment constraint period of the current moment.

The obtaining method may include: judging whether the absolute value of the pulp volume deviation value is larger than a preset second volume deviation threshold value or not; if so, taking the first time length as an adjustment constraint period of the current time; and if not, taking the second time length as the regulation constraint period of the current time. Wherein the first duration is less than the second duration. For example, the first time period may be 5 seconds and the second time period may be 20 seconds.

It will be appreciated that the second volume deviation threshold may be set based on the maximum slurry volume in the pump tank, for example, the second volume deviation threshold may be set to 10% of the maximum liquid level. In addition, the first volume deviation threshold and the second volume deviation threshold may be the same or different, and this is not limited in this embodiment.

S802, judging whether the time elapsed from the moment when the output flow of the pump pool changes last time at the current moment reaches the current constraint period or not; if so, the process proceeds to S803.

And S803, entering the step of adjusting the current output flow of the pump pool by the adjusting value of the output flow.

Through adjusting the restraint cycle, this embodiment can avoid excessively adjusting the ore pulp flow of pump pond output, and select different regulation restraint cycles based on different current liquid level scope, can carry out relatively frequent regulation to the actual liquid level when the actual liquid level is too big or undersize and carry out the regulation of relative scarcity when the actual liquid level is close to the benchmark liquid level to can effectively avoid the ore pulp to overflow under the stable circumstances of keeping pump pond liquid level and jump out and the empty condition of taking place of pump pond.

And then returns to fig. 2.

Through the technical scheme of the embodiment, the variable quantity of the pulp volume is the difference value between the pulp volume injected into the pump pool by the pulp flow output by the ore grinding machine in the last regulation period and the pulp output by the pump pool, and the pulp volume deviation value is the difference value between the pulp volume corresponding to the current actual liquid level in the pump pool and the pulp volume corresponding to the reference liquid level of the pump pool, so that the output flow of the pump pool can be more accurately adjusted to the pulp flow injected into the pump pool by the first regulation value calculated by the pulp volume change value, and the actual liquid level of the pump pool can be more accurately adjusted to the reference liquid level by the second regulation value calculated by the pulp volume deviation value, thereby more accurately keeping the liquid level in the pump pool stable on the reference liquid level and enabling the grading effect of the ore grinding grading process to be more stable.

Corresponding to the method embodiment, the application also provides a device for controlling the output flow of the ore grinding pump pool.

Referring to fig. 9, there is shown a block diagram of an embodiment 1 of the apparatus for controlling the liquid level of a pump bath in the classification of grinding ore in the present application. In this embodiment, the apparatus may include:

a first liquid level obtaining module 901, configured to obtain a first actual liquid level of the pump pool at the beginning of a last adjustment period;

a second liquid level obtaining module 902, configured to obtain a second actual liquid level of the pump pool at the end of the last adjustment period;

a volume change calculation module 903, configured to calculate a change value of the pulp volume of the pump pool in the latest adjustment period according to the pulp volumes formed in the pump pool by the first actual liquid level and the second actual liquid level respectively;

a volume deviation calculating module 904, configured to calculate, according to the detected pulp volumes respectively formed in the pump sump by the current actual liquid level of the pump sump and a preset reference liquid level, a pulp volume deviation value of the current actual liquid level deviating from the reference liquid level;

a first adjustment value calculation module 905, configured to calculate an adjustment value of an output flow based on the change value of the pulp volume;

a second adjustment value calculation module 906, configured to calculate a second adjustment value of the output flow rate based on the pulp volume deviation value;

and a flow rate adjusting module 907, configured to adjust the current output flow rate of the pump pool by using a difference between the first adjustment value and the second adjustment value.

Optionally, the first actual liquid level is an actual liquid level detection value obtained by detecting the liquid level of the pump sump at the starting time of the last adjustment period, and the second actual liquid level is an actual liquid level detection value obtained by detecting the liquid level of the pump sump at the ending time of the last adjustment period.

Optionally, as shown in fig. 10, in an embodiment of the first liquid level obtaining module 901, the first liquid level obtaining module 901 may include:

a first detection value obtaining sub-module 1001, configured to take a detection period before a start time of the latest adjustment period as a first detection period, and obtain all actual liquid level detection values obtained by detecting the pump sump in the first detection period;

the first liquid level calculation submodule 1002 is configured to calculate an average value of all actual liquid level detection values in the first detection period, and use the average value as the first actual liquid level;

optionally, as shown in fig. 11, in an embodiment of the second liquid level obtaining module 902, the second liquid level obtaining module 902 may include:

a second detection value obtaining sub-module 1101, configured to use a detection period before an end time of the last adjustment period as a second detection period, and obtain all actual liquid level detection values obtained by detecting the pump sump in the second detection period;

and a second liquid level calculating submodule 1102, configured to calculate an average value of all detection cycles of the actual liquid levels in the second detection period, as the second actual liquid level.

Optionally, in an embodiment of the first adjustment value calculating module 905 shown in fig. 12, the first adjustment value calculating module 905 may include:

a volume change judgment submodule 1201, configured to judge whether an absolute value of a change value of the pulp volume is greater than a preset volume change threshold;

a first ratio calculation sub-module 1202, configured to determine, when the determination result of the volume change determination sub-module 1201 is yes, the first adjustment value according to a product of the change value of the pulp volume and a first adjustment ratio parameter;

a second proportion calculation submodule 1203, configured to determine the first adjustment value according to a product of the change value of the pulp volume and a second adjustment proportion parameter when the determination result of the volume change determination submodule 1201 is negative;

wherein the first adjustment ratio parameter is greater than the second adjustment ratio parameter.

Optionally, as in an embodiment of the second adjustment value calculating module 906 shown in fig. 13, the second adjustment value calculating module 906 may include:

the first deviation judgment sub-module 1301 is configured to judge whether an absolute value of the pulp volume deviation value is greater than a preset first volume deviation threshold;

a third proportion calculation sub-module 1302, configured to determine, when the determination result of the first deviation sub-module 1301 is yes, the second adjustment value according to a product of the pulp volume deviation value and a third adjustment proportion parameter;

a fourth proportion calculation sub-module 1303, configured to determine the second adjustment value according to a product of the change value of the pulp volume and a fourth adjustment proportion parameter if the determination result of the first deviation sub-module 1301 is negative;

wherein the third adjustment ratio parameter is greater than the fourth adjustment ratio parameter.

Referring to fig. 14, there is shown a block diagram of an embodiment 2 of the apparatus for controlling the liquid level of a pump bath in the classification of grinding ore in the present application. In this embodiment, in addition to all the structures shown in fig. 9, the following may be included:

a current concentration obtaining module 1401, configured to obtain a current actual pulp concentration of the pump sump;

an adjusting condition determining module 1402, configured to determine whether the current actual ore pulp concentration and the current actual liquid level of the pump pool meet a water adding amount adjusting condition; the water adding amount adjusting condition is that the current actual ore pulp concentration is greater than a preset concentration upper limit value and the current actual liquid level is greater than the reference liquid level, or the current actual ore pulp concentration is less than a preset concentration lower limit value and the current actual liquid level is less than the reference liquid level; wherein the upper concentration limit is greater than the lower concentration limit;

and a water adding amount adjusting module 1403, configured to, if the determination condition of the adjusting condition module 1402 is yes, adjust the water adding amount of the pump pool by using the second adjustment value as an adjustment value of the water adding amount.

Referring to fig. 15, there is shown a block diagram of the embodiment 3 of the apparatus for controlling the liquid level of the pump bath in the ore grinding classification process of the present application. In this embodiment, in addition to all the structures shown in fig. 9, the following may be included:

a constraint period obtaining module 1501, configured to obtain an adjustment constraint period at the current time;

a constraint judging module 1502, configured to judge whether a time elapsed from a time when the output flow of the pump pool changes last time at the current time reaches the current constraint period or not;

an adjusting triggering module 1503, configured to trigger the traffic adjusting module 807 if the determination result of the constraint determining module 1502 is yes.

Optionally, as shown in fig. 16, in an implementation manner of the constraint period acquisition module 1501 in this embodiment, the constraint period acquisition module 1501 may include:

the second deviation judgment sub-module 1601 is configured to judge whether an absolute value of the pulp volume deviation value is greater than a preset second volume deviation threshold;

a first period determining sub-module 1602, configured to, when the determination result of the second deviation determining sub-module 1601 is yes, take the first time length as the adjustment constraint period of the current time;

a second period determining sub-module 1603, configured to, if the determination result of the second deviation determining sub-module 1601 is negative, use a second duration as the adjustment constraint period of the current time;

wherein the first duration is less than the second duration.

Through the device embodiment of this application, the output flow adjustment of pump pond to the ore pulp flow of pouring into the pump pond can be more accurately adjusted to the first regulating value that obtains by the variance of ore pulp volume calculation, and the second regulating value that obtains by the calculation of ore pulp volume deviation value can more accurately adjust the actual liquid level in pump pond to its benchmark liquid level to more accurately keep the interior liquid level of pump pond stable on the benchmark liquid level, make the classification effect of ore grinding classification process more stable.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

For the device embodiments, since they substantially correspond to the method embodiments, reference may be made to the partial description of the method embodiments for relevant points. The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.

Claims (16)

1. A method for controlling the liquid level of a pump pool in the ore grinding and classifying process is characterized by comprising the following steps:

acquiring a first actual liquid level of a pump pool at the beginning of a latest adjusting period, and acquiring a second actual liquid level of the pump pool at the end of the latest adjusting period;

calculating the change value of the pulp volume of the pump pool in the latest adjusting period according to the pulp volumes formed in the pump pool by the first actual liquid level and the second actual liquid level respectively; calculating ore pulp volume deviation values of the current actual liquid level deviating from the reference liquid level according to the detected ore pulp volumes formed in the pump pool by the current actual liquid level of the pump pool and the preset reference liquid level respectively;

calculating a first regulating value of output flow based on the change value of the pulp volume, and calculating a second regulating value of output flow based on the pulp volume deviation value;

and adjusting the current output flow of the pump pool by the difference value of the first adjusting value and the second adjusting value.

2. The method of claim 1, wherein the first actual level is a detected actual level at a beginning of the last adjustment cycle and the second actual level is a detected actual level at an end of the last adjustment cycle.

3. The method of claim 1, wherein said obtaining a first actual fluid level of the pump sump at the beginning of a last conditioning cycle comprises:

taking a detection period before the starting time of the latest adjustment period as a first detection period, acquiring all actual liquid level detection values obtained by detecting the pump pool in the first detection period, and calculating the average value of all actual liquid level detection values in the first detection period as the first actual liquid level;

the obtaining a second actual liquid level of the pump sump at the end of the last adjustment period comprises:

and taking a detection period before the end time of the latest adjusting period as a second detection period, acquiring all actual liquid level detection values obtained by detecting the pump pool in the second detection period, and calculating the average value of all actual liquid level detection periods in the second detection period as the second actual liquid level.

4. The method according to claim 1, wherein calculating a first adjustment value of output flow based on the change in slurry volume comprises:

judging whether the absolute value of the change value of the pulp volume is larger than a preset volume change threshold value or not;

if yes, determining the first adjusting value according to the product of the change value of the pulp volume and a first adjusting proportion parameter;

if not, determining the first adjusting value according to the product of the change value of the ore pulp volume and a second adjusting proportion parameter;

wherein the first adjustment ratio parameter is greater than the second adjustment ratio parameter.

5. The method according to claim 1, wherein calculating a second adjustment value for output flow based on the pulp volume deviation value comprises:

judging whether the absolute value of the pulp volume deviation value is larger than a preset first volume deviation threshold value or not;

if so, determining the second adjusting value according to the product of the pulp volume deviation value and a third adjusting proportion parameter;

if not, determining the second adjusting value according to the product of the pulp volume deviation value and a fourth adjusting proportion parameter;

wherein the third adjustment ratio parameter is greater than the fourth adjustment ratio parameter.

6. The method of claim 1, further comprising:

acquiring the current actual ore pulp concentration of the pump pool;

judging whether the current actual ore pulp concentration and the current actual liquid level of the pump pool meet concentration regulation conditions or not; the concentration adjusting conditions are that the current actual ore pulp concentration is greater than a preset concentration upper limit value and the current actual liquid level is greater than the reference liquid level, or the current actual ore pulp concentration is less than a preset concentration lower limit value and the current actual liquid level is less than the reference liquid level; wherein the upper concentration limit is greater than the lower concentration limit;

if so, adjusting the water adding amount of the pump pool by taking the second adjusting value as the adjusting value of the water adding amount.

7. The method of claim 1, further comprising:

acquiring an adjustment constraint period at the current moment;

judging whether the time elapsed from the current moment to the moment when the output flow of the pump pool changes last time reaches the current constraint period or not;

if yes, the current output flow of the pump pool is adjusted by the adjusting value of the output flow.

8. The method of claim 7, wherein the obtaining the adjustment constraint period of the current time comprises:

judging whether the absolute value of the pulp volume deviation value is larger than a preset second volume deviation threshold value or not;

if so, taking the first time length as an adjustment constraint period of the current time;

if not, taking the second time length as the regulation constraint period of the current time;

wherein the first duration is less than the second duration.

9. The utility model provides a device of pump pond liquid level control among ore grinding classification process which characterized in that includes:

the first liquid level acquisition module is used for acquiring a first actual liquid level of the pump pool at the beginning of the latest adjusting period;

the second liquid level acquisition module is used for acquiring a second actual liquid level of the pump pool at the end of the latest adjusting period;

the volume change calculation module is used for calculating the change value of the pulp volume of the pump pool in the latest adjusting period according to the pulp volumes formed in the pump pool by the first actual liquid level and the second actual liquid level respectively;

the volume deviation calculation module is used for calculating the ore pulp volume deviation value of the current actual liquid level deviating from the reference liquid level according to the detected ore pulp volumes formed in the pump pool by the current actual liquid level of the pump pool and the preset reference liquid level;

the first adjusting value calculating module is used for calculating an adjusting value of output flow based on the change value of the pulp volume;

the second adjusting value calculating module is used for calculating a second adjusting value of output flow based on the pulp volume deviation value;

and the flow regulating module is used for regulating the current output flow of the pump pool by using the difference value of the first regulating value and the second regulating value.

10. The apparatus of claim 9, wherein the first actual fluid level is a sensed fluid level value obtained by sensing a fluid level of the pump sump at a beginning of the last adjustment cycle, and the second actual fluid level is a sensed fluid level value obtained by sensing a fluid level of the pump sump at an end of the last adjustment cycle.

11. The apparatus of claim 9, wherein the first level acquisition module comprises:

a first detection value acquisition submodule, configured to take a detection period before a start time of the latest adjustment period as a first detection period, and acquire all actual liquid level detection values obtained by detecting the pump pool in the first detection period;

the first liquid level calculation submodule is used for calculating the average value of all actual liquid level detection values in the first detection period to serve as the first actual liquid level;

the second liquid level acquisition module includes:

a second detection value acquisition submodule, configured to take a detection period before an end time of the latest adjustment period as a second detection period, and acquire all actual liquid level detection values obtained by detecting the pump pool in the second detection period;

and the second liquid level calculation submodule is used for calculating the average value of all the actual liquid level detection cycles in the second detection period as the second actual liquid level.

12. The apparatus of claim 9, wherein the first adjustment value calculation module comprises:

the volume change judgment submodule is used for judging whether the absolute value of the change value of the ore pulp volume is larger than a preset volume change threshold value or not;

the first proportion calculation submodule is used for determining a first adjusting value according to the product of the change value of the ore pulp volume and a first adjusting proportion parameter under the condition that the judgment result of the volume change judgment submodule is yes;

the second proportion calculation submodule is used for determining the first adjusting value according to the product of the change value of the ore pulp volume and a second adjusting proportion parameter under the condition that the judgment result of the volume change judgment submodule is negative;

wherein the first adjustment ratio parameter is greater than the second adjustment ratio parameter.

13. The apparatus of claim 9, wherein the second adjustment value calculation module comprises:

the first deviation judgment submodule is used for judging whether the absolute value of the pulp volume deviation value is larger than a preset first volume deviation threshold value or not;

the third proportion calculation submodule is used for determining the second adjusting value according to the product of the pulp volume deviation value and a third adjusting proportion parameter under the condition that the judgment result of the first deviation submodule is yes;

the fourth proportion calculation submodule is used for determining the second adjusting value according to the product of the pulp volume deviation value and a fourth adjusting proportion parameter under the condition that the judgment result of the first deviation submodule is negative;

wherein the third adjustment ratio parameter is greater than the fourth adjustment ratio parameter.

14. The apparatus of claim 9, further comprising:

the current concentration acquisition module is used for acquiring the current actual ore pulp concentration of the pump pool;

the adjusting condition judging module is used for judging whether the current actual ore pulp concentration and the current actual liquid level of the pump pool meet the water adding amount adjusting condition or not; the water adding amount adjusting condition is that the current actual ore pulp concentration is greater than a preset concentration upper limit value and the current actual liquid level is greater than the reference liquid level, or the current actual ore pulp concentration is less than a preset concentration lower limit value and the current actual liquid level is less than the reference liquid level; wherein the upper concentration limit is greater than the lower concentration limit;

and the water adding amount adjusting module is used for adjusting the water adding amount of the pump pool by taking the second adjusting value as the adjusting value of the water adding amount under the condition that the judging condition of the adjusting condition module is yes.

15. The apparatus of claim 9, further comprising:

the constraint period acquisition module is used for acquiring the adjustment constraint period at the current moment;

the constraint judging module is used for judging whether the time elapsed from the moment when the output flow of the pump pool changes at the last time reaches the current constraint period or not;

and the regulation triggering module is used for triggering the flow regulation module under the condition that the judgment result of the constraint judgment module is yes.

16. The apparatus of claim 15, wherein the constraint period acquisition module comprises:

the second deviation judgment submodule is used for judging whether the absolute value of the pulp volume deviation value is larger than a preset second volume deviation threshold value or not;

a first period determining submodule, configured to take a first time length as an adjustment constraint period of the current time when a determination result of the second deviation determining submodule is yes;

a second period determining submodule, configured to, when a determination result of the second deviation determining submodule is negative, use a second duration as an adjustment constraint period of the current time;

wherein the first duration is less than the second duration.