CN104525353A - System for controlling grinding density and fineness as well as method for controlling grinding density and fineness - Google Patents
System for controlling grinding density and fineness as well as method for controlling grinding density and fineness Download PDFInfo
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Abstract
The invention provides a system for controlling grinding density and fineness as well as a method for controlling grinding density and fineness. The system for controlling grinding density and fineness comprises an interface operation unit, a detection unit, a central data processing unit and a PID control unit, according to a comparison result of the central data processing unit, ore-feeding amount of an ore-feeding apparatus, water supply volume of a water supply apparatus and frequency of a slurry pump at upstream of a cyclone can be controlled, so that actual overflow concentration and the actual overflow granularity is in a set overflow concentration set parameter and overflow granularity set parameter scope. The invention also provides a method for controlling grinding density and fineness, which comprises the following steps: preseting, detecting, processing, controlling grinding density and controlling the grinding granularity. By using the system for controlling grinding density and fineness as well as the method for controlling grinding density and fineness, concentration and granularity of pulp through grinding can be effectively controlled, effect is rapid, and operation is simple.
Description
Technical field
The application relates to ore dressing field, especially relates to a kind of ore grinding enriched fineness control system and ore grinding enriched fineness control method.
Background technology
Ore grinding part is as ore dressing part very important part, and the quality of grinding operation index directly has influence on the stable of next stage beneficiation flowsheet floatation indicators.Therefore, stable control ore milling concentration and size indicator have very important effect for mineral processing production.
The control of granularity is more important relative to the control of concentration, because granularity is larger for the impact of flotation, so stable Control granularity is more more meaningful than controlled concentration.The control theory of cyclone overflow granularity is said be more high better, too highly certainly also have for flotation unfavorable, during actual industrial controls, basic Task-size Controlling is all on the low side, controls to reach more than low limit value just passable as long as general.
When concentration and Task-size Controlling clash, preferentially ensure granularity, be concentration and then, namely sometimes operating mode is bad, sacrifice concentration to exchange better granularity for, and the adjustment of granularity controls to regulate within the scope of high-low limits in concentration.
Existing grinding flowsheet is roughly as follows:
Ore is given on belt by mine-feeding equipment, ore enters semi-autogenous mill by Belt Conveying again, the feeding end of semi-autogenous mill is provided with the Semi-Autogenous valve that adds water, water and ore enter semi-autogenous mill, steel ball is had in semi-autogenous mill, by the rotation of semi-autogenous mill by ore reduction, discharge from the exhaust end of semi-autogenous mill;
The exhaust end of semi-autogenous mill is provided with Semi-Autogenous flushing water valve, the ore pulp of discharging from the exhaust end of semi-autogenous mill carries out first time classification by straight line shaker, straight line shaker also has flushing water, and thick particle falls into passback belt by vibration on compass screen surface, then returns and enter semi-autogenous mill fragmentation;
The undersize of straight line shaker, enters Pulp pump pond, is transported to cyclone by Pulp pump, carries out second time classification; Qualified grade overflows and enters floatation system by cyclone, and coarse granule enters ball mill from the desilting mouth of cyclone, again grinds, and discharges afterwards from the exhaust end of ball mill.The exhaust end of ball mill is provided with flushing water, and the ore pulp that ball milling is discharged enters Pulp pump pond, and then enters cyclone classification.
The control of current ore milling concentration and granularity is generally operated by skilled workman, and the data measured according to instrument manually adjust, and its shortcoming is, controls precision inadequate, and response speed is slow, and labour intensity is large, weak effect.
Summary of the invention
This application provides a kind of ore grinding enriched fineness control system and ore grinding enriched fineness control method, to solve the problem.
The application is achieved in that
The application provides a kind of ore grinding enriched fineness control system, comprising:
Interface operation unit, input the setup parameter about ore milling concentration and granularity wherein, described setup parameter comprises effluent concentration setup parameter and the overflow granularity setup parameter of mine-supplying quantity setup parameter, confluent setup parameter, Semi-Autogenous concentration setup parameter and cyclone;
Detecting unit, be configured to detect the actual parameter about ore grinding enriched fineness, described actual parameter comprises: the actual effluent concentration of the actual mine-supplying quantity of mine-feeding equipment, the actual confluent of waterworks, cyclone and actual overflow granularity;
Central data processing unit, contrasts after being configured to described actual parameter and described setup parameter directly to carry out to contrast or process, obtains comparing result; And
PID control unit, be configured to the comparing result according to described central data processing unit, control the frequency of Pulp pump of the mine-supplying quantity of mine-feeding equipment, the confluent of waterworks and described cyclone upstream, make described actual effluent concentration and described actual overflow granularity within the scope of the effluent concentration setup parameter and overflow granularity setup parameter of setting.
Preferably, described setup parameter also comprises the excess flow setup parameter of Pulp pump pit level setup parameter, the pressure setting parameter of described cyclone, the feed ore concentration setup parameter of described cyclone and described cyclone; Described confluent setup parameter comprises the confluent setup parameter of the Semi-Autogenous valve that adds water, the confluent setup parameter of Semi-Autogenous flushing water valve, the confluent setup parameter of ball milling flushing water valve; Described actual parameter also comprises the actual liquid level in Pulp pump pond, the actual feed ore concentration of described cyclone, actual pressure and actual excess flow, and the actual confluent of described waterworks comprises the actual confluent of the described Semi-Autogenous valve that adds water, described Semi-Autogenous flushing water valve, described ball milling flushing water valve; Described PID control unit also controls the working quantity of described cyclone.
Preferably, described central data processing unit control described PID control unit adjust described mine-feeding equipment give ore deposit frequency, keep mine-supplying quantity constant, when there is deviation in described actual effluent concentration and described effluent concentration setup parameter, calculate and contrast described confluent setup parameter and actual confluent, obtain the water yield needing to supplement, control the described Semi-Autogenous valve that adds water, described Semi-Autogenous flushing water valve, described ball milling flushing water valve adjust its respective confluent; The adjustment of the confluent of described Semi-Autogenous flushing water valve is no more than the threshold limit value of the confluent setup parameter of Semi-Autogenous flushing water valve, and the adjustment of the confluent of the described Semi-Autogenous valve that adds water is no more than the threshold value of described Semi-Autogenous concentration setup parameter; When the actual confluent of described Semi-Autogenous flushing water valve exceedes the threshold limit value of the confluent setup parameter of described Semi-Autogenous flushing water valve, when the actual confluent of the described Semi-Autogenous valve that adds water exceedes the threshold value of described Semi-Autogenous concentration setup parameter, the water yield that is unnecessary or that lack will control described ball milling flushing water valve by described PID control unit and regulate.
More preferred, the actual confluent of the Semi-Autogenous valve that adds water, Semi-Autogenous flushing water valve, ball milling flushing water valve changes, when causing the actual liquid level in Pulp pump pond to exceed the peak of described Pulp pump pit level setup parameter, described central data processing unit increases described Pulp pump frequency by described PID control unit, until the actual excess flow that the pressure of described cyclone is greater than described cyclone pressure setting parameter peak or cyclone is greater than the minimum of described cyclone excess flow setup parameter peak or described Pulp pump pit level setup parameter; When the actual liquid level in Pulp pump pond is lower than the minimum of described Pulp pump pit level setup parameter, described central data processing unit reduces Pulp pump frequency by described PID control unit, until the actual pressure of cyclone is lower than the peak of described cyclone pressure setting parameter minimum or described Pulp pump pit level setup parameter.
Preferably, when minimum lower than described cyclone overflow granularity setup parameter of the actual overflow granularity of cyclone, described central data processing unit opens one group in the cyclone do not worked by described PID control unit; Continue to detect, if during the minimum of the actual overflow granularity of cyclone still lower than described cyclone overflow granularity setup parameter, then open one group of cyclone do not worked, until all cyclones are all opened.
More preferred, when all cyclones all open the actual overflow granularity that still can not control cyclone fall within the scope of described cyclone overflow granularity setup parameter time, check whether the actual feed ore concentration of cyclone is within the scope of described cyclone feed ore concentration setup parameter, when the actual feed ore concentration of cyclone is greater than described cyclone feed ore concentration setup parameter, described central data processing unit reduces the effluent concentration setup parameter of described cyclone automatically, described PID control unit can make respective response action, control the Semi-Autogenous valve that adds water, Semi-Autogenous flushing water valve and ball milling flushing water valve strengthen actual confluent, until stop when the actual overflow granularity of the actual effluent concentration of the cyclone effluent concentration setup parameter minimum or cyclone that reach described cyclone falls within the scope of described cyclone overflow granularity setup parameter, when the actual overflow granularity that above-mentioned action still can not control cyclone falls within the scope of the overflow granularity setup parameter of described cyclone, described central data processing unit controls the frequency that described PID control unit increases described Pulp pump, until the actual pressure of described cyclone reaches the peak of the pressure setting parameter of described cyclone, in the process, when the actual excess flow of cyclone is greater than the peak of described cyclone excess flow setup parameter, stop the frequency increasing described Pulp pump.
The application also provides a kind of ore grinding enriched fineness control method, and wherein, described method comprises:
A. foresee steps: input the setup parameter about ore milling concentration and granularity in interface operation unit, described setup parameter comprises effluent concentration setup parameter and the overflow granularity setup parameter of mine-supplying quantity setup parameter, confluent setup parameter, Semi-Autogenous concentration setup parameter and cyclone;
B. detecting step: utilize detecting unit detection about the actual parameter of ore grinding enriched fineness, described actual parameter comprises: the actual effluent concentration of the actual mine-supplying quantity of mine-feeding equipment, the actual confluent of waterworks, cyclone and actual overflow granularity;
C. treatment step: the described actual parameter detected by described detecting unit is transferred to central data processing unit with the described setup parameter inputted by described interface operation unit, is contrasted by described central data processing unit; And
D. ore milling concentration rate-determining steps and grinding particle size rate-determining steps: according to the comparing result of described central data processing unit, controlled the frequency of Pulp pump of the adjustment mine-supplying quantity of mine-feeding equipment, the confluent of waterworks and described cyclone upstream by PID control unit, make described actual effluent concentration and described actual overflow granularity within the scope of the effluent concentration setup parameter and overflow granularity setup parameter of setting.
Preferably, described setup parameter also comprises the excess flow setup parameter of Pulp pump pit level setup parameter, the pressure setting parameter of described cyclone, the feed ore concentration setup parameter of described cyclone and described cyclone; Described confluent setup parameter comprises the confluent setup parameter of the Semi-Autogenous valve that adds water, the confluent setup parameter of Semi-Autogenous flushing water valve, the confluent setup parameter of ball milling flushing water valve; Described actual parameter also comprises the actual liquid level in Pulp pump pond, the actual feed ore concentration of described cyclone, actual pressure and actual excess flow, and the actual confluent of described waterworks comprises the actual confluent of the described Semi-Autogenous valve that adds water, described Semi-Autogenous flushing water valve, described ball milling flushing water valve; Described PID control unit also controls the working quantity of described cyclone.
Preferably, described ore milling concentration rate-determining steps is:
Described central data processing unit control described PID control unit adjust described mine-feeding equipment give ore deposit frequency or keep mine-supplying quantity constant, when there is deviation in described actual effluent concentration and described effluent concentration setup parameter, calculate and contrast described confluent setup parameter and actual confluent, obtain the water yield needing to supplement, control the described Semi-Autogenous valve that adds water, described Semi-Autogenous flushing water valve, described ball milling flushing water valve adjust its respective confluent;
The actual confluent of described Semi-Autogenous flushing water valve is no more than the threshold limit value of the adjustment setup parameter of the confluent of Semi-Autogenous flushing water valve, and the adjustment of the confluent of the described Semi-Autogenous valve that adds water is no more than the threshold value of described Semi-Autogenous concentration setup parameter; When the actual confluent of described Semi-Autogenous flushing water valve exceedes the threshold limit value of the confluent setup parameter of described Semi-Autogenous flushing water valve, when the actual confluent of the described Semi-Autogenous valve that adds water exceedes the threshold value of described Semi-Autogenous concentration setup parameter, the water yield that is unnecessary or that lack will control described ball milling flushing water valve by described PID control unit and regulate;
The actual confluent of the Semi-Autogenous valve that adds water, Semi-Autogenous flushing water valve, ball milling flushing water valve changes, when causing the actual liquid level in Pulp pump pond to exceed the peak of described Pulp pump pit level setup parameter, described central data processing unit increases described Pulp pump frequency by described PID control unit, until the actual excess flow that the actual pressure of described cyclone is greater than described cyclone pressure setting parameter peak or cyclone is greater than the minimum of described cyclone excess flow setup parameter peak or described Pulp pump pit level setup parameter; When the actual liquid level in Pulp pump pond is lower than the minimum of described Pulp pump pit level setup parameter, described central data processing unit reduces Pulp pump frequency by described PID control unit, until the actual pressure of cyclone is lower than the peak of described cyclone pressure setting parameter minimum or described Pulp pump pit level setup parameter.
Preferably, described grinding particle size rate-determining steps is:
When minimum lower than described cyclone overflow granularity setup parameter of the actual overflow granularity of cyclone, described central data processing unit opens one group in the cyclone do not worked by described PID control unit; Continue to detect, if during the minimum of the actual overflow granularity of cyclone still lower than described cyclone overflow granularity setup parameter, then open one group of cyclone do not worked, until all cyclones are all opened;
When all cyclones all open the actual overflow granularity that still can not control cyclone fall within the scope of described cyclone overflow granularity setup parameter time, check whether the actual feed ore concentration of cyclone is within the scope of described cyclone feed ore concentration setup parameter, when the actual feed ore concentration of cyclone is greater than described cyclone feed ore concentration setup parameter, described central data processing unit reduces the effluent concentration setup parameter of described cyclone automatically, described PID control unit can make respective response action, control the Semi-Autogenous valve that adds water, Semi-Autogenous flushing water valve and ball milling flushing water valve strengthen actual confluent, the actual feed ore concentration of cyclone is made to be within the scope of described cyclone feed ore concentration setup parameter, otherwise, then regulate until stop when the actual overflow granularity of the actual effluent concentration of the cyclone effluent concentration setup parameter minimum or cyclone that reach described cyclone falls within the scope of described cyclone overflow granularity setup parameter, when the actual overflow granularity that above-mentioned action still can not control cyclone falls within the scope of the overflow granularity setup parameter of described cyclone, described central data processing unit controls the frequency that described PID control unit increases described Pulp pump, until the actual overflow granularity of cyclone falls within the scope of described cyclone overflow granularity setup parameter, otherwise, the actual pressure of described cyclone is then regulated to reach the peak of the pressure setting parameter of described cyclone, in the process, when the actual excess flow of cyclone is greater than the peak of described cyclone excess flow setup parameter, stop the frequency increasing described Pulp pump.
The control procedure that the application provides is step by step, adjusts, after a while view result, if qualified, just no longer adjusts, if defective, continues adjustment, until limit value, i.e. and Dynamic controlling adjustment modes.
A kind of ore grinding enriched fineness control system provided by the application and ore grinding enriched fineness control method, at least one in following beneficial effect can be brought:
The first, data acquisition and device manipulate whole automation, fast response time; The second, more accurate to the regulation and control of each device; 3rd, whole Automated condtrol, reduces labour intensity, improves degree of safety; 4th, comprehensively can monitor the running status of grinding system in real time, convenient management; 5th, the stability of a system is higher, output pulp density and size distribution more stable.
Accompanying drawing explanation
The schematic diagram of the grinding flowsheet of Fig. 1 involved by the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the application is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the application, but not the restriction to the application.
The schematic diagram of the grinding flowsheet of Fig. 1 involved by the embodiment of the present invention.
As shown in Figure 1, in one preferred embodiment, mine-feeding equipment is heavy plate feeder 1.Its grinding flowsheet is roughly as described below:
Ore is given on No. three belts 2 by heavy plate feeder 1, and measures actual mine-supplying quantity by belt conveyer scale 3.Ore delivers into semi-autogenous mill 5 by No. three belts 2 again, the feeding end of semi-autogenous mill 5 is provided with the Semi-Autogenous valve 4 that adds water, actual confluent is recorded by the Semi-Autogenous valve flowmeter 40 that adds water, water and ore enter semi-autogenous mill 5, steel ball is had in semi-autogenous mill 5, by the rotation of semi-autogenous mill 5 by ore reduction, discharge from the exhaust end of semi-autogenous mill 5;
The exhaust end of semi-autogenous mill 5 is provided with Semi-Autogenous flushing water valve 6, and actual confluent is recorded by Semi-Autogenous flushing water valve flowmeter 60; The ore pulp of discharging from the exhaust end of semi-autogenous mill 5 carries out first time classification by straight line shaker 7, straight line shaker 7 also there is flushing water, thick particle falls into No. four belts by vibration on compass screen surface, turn back to No. three belt (not shown)s by No. six belts again, again enter semi-autogenous mill 5 broken;
The undersize of straight line shaker 7, enters Pulp pump pond 8, and the actual liquid level in Pulp pump pond 8 is recorded by Pulp pump pit level meter 80, is transported to cyclone 10, carries out second time classification by Pulp pump 9; By regulating the technological parameter such as feed ore concentration, pressure, flow, work number, excess flow of cyclone 10, qualified grade overflows and enters floatation system by cyclone 10, coarse granule enters ball mill 11 from the desilting mouth of cyclone 10, again grind, discharge from the exhaust end of ball mill 11 afterwards.The exhaust end of ball mill 11 is provided with flushing water, and control confluent by controlling ball milling flushing water valve 12, actual confluent is recorded by ball milling flushing water valve flowmeter 120, and the ore pulp that ball milling is discharged enters Pulp pump pond 8, and then enters cyclone 10 classification.
The arrival end of cyclone 10 is provided with cyclone feed ore concentration detector 100, cyclone 10 is provided with cyclone Pressure gauge 103.
The pipeline that cyclone 10 overflow enters floatation system there is a cyclone excess flow meter 101, detects cyclone excess flow; Also have a particle size analyzer (cyclone overflow granularity instrument) 102 in addition for detecting cyclone overflow granularity and cyclone effluent concentration, and using important reference that cyclone overflow granularity and cyclone effluent concentration regulate as ore grinding.
It is important to note that control and regulation are step by step, adjust, after a while view result, if qualified, just no longer adjust, if defective, continue adjustment, until limit value, all control involved by the application is all such, repeats no more.
Ore milling concentration controls:
1, heavy plate is to ore control
In one preferred embodiment, No. three belts 2 are distributed with 12 heavy plate feeder 1, be out 6 under normal circumstances, 6 for subsequent use, the heavy plate feeder of work is all paired setting, and give ore deposit frequency consistent, can prevent like this because left and right is uneven and cause belt deviation to ore deposit.Setting mine-supplying quantity (being 1800t/h under normal circumstances) is only needed to ore deposit, according to the actual mine-supplying quantity that belt conveyer scale 3 is surveyed, by mine-feeding equipment PID controller automatically regulate heavy plate feeder to ore deposit frequency, control the object of mine-supplying quantity to reach.Paired heavy plate feeder give ore deposit rate-adaptive pacemaker consistent, with a PID control.6 counterweight plates are controlled by 6 PID, and setting ore deposit amount is all 1800t/h.
2, Semi-Autogenous concentration controls
Semi-Autogenous concentration setup parameter is set as 82%; Central data processing unit calculates according to following formula:
Semi-Autogenous concentration=actual mine-supplying quantity of solute/solution=No. tri-belt/(the actual confluents of No. three actual mine-supplying quantity of belt+Semi-Autogenous valves that add water)
The theoretical confluent of semi-autogenous mill 5 needs can be calculated according to above formula, according to the actual confluent that the Semi-Autogenous valve flowmeter 40 that adds water is measured, automatically regulate the Semi-Autogenous valve that adds water by the Semi-Autogenous valve PID controller that adds water.
3, ore milling concentration control method
In whole grinding system, it is input as mine-supplying quantity and the total water confluent of ore grinding, and export as cyclone overflow pulp, cyclone effluent concentration and granularity are as final control objectives.If whole grinding system to be regarded as an entirety, and whole grinding system is in a stable dynamic equilibrium, cyclone effluent concentration=mine-supplying quantity/(mine-supplying quantity+total confluent), in actual moving process, the change of delayed, operating mode of actual concentration owing to artificially regulating, even if ensure constant to ore deposit and feedwater, concentration is actual can fluctuate up and down in desirable concentration.
According to actual effluent concentration ND1 (being 38.92%) and the deviation of effluent concentration setup parameter (being set as 39%) ND2, the actual mine-supplying quantity GKL (actual average mine-supplying quantity is 1888t/h) of No. three belts 2 that artificially set of the cyclone of particle size analyzer 102 measurement, enter total confluent (the total confluent of ore grinding of the Semi-Autogenous valve flowmeter that adds water, Semi-Autogenous flushing water valve flowmeter, the ball milling flushing water valve flowmeter survey) GSL (3048m of flowsheet of grinding circuit
3/ h), automatically the rate of water make-up deviation ERR of needs is calculated, by the Semi-Autogenous valve PID controller that adds water, Semi-Autogenous flushing water valve PID controller, ball milling flushing water valve PID controller, automatically regulate the Semi-Autogenous valve that adds water, Semi-Autogenous flushing water valve, ball milling flushing water valve.
Particle size analyzer concentration ND1=GKL/ (GKL+GSL1)
The actual total confluent GSL1=GKL/ND1-GKL of ore grinding can be thought
Effluent concentration setup parameter ND2=GKL/ (GKL+GSL2)
The total confluent GSL2=GKL/ND1-GKL of desirable ore grinding can be thought, then
The deviation ERR=GSL1-GSL2 of ore grinding moisturizing
Ore grinding moisturizing average deviation ERR_MAVE=ERR/3
ERR (also can be negative) needs for grinding system the confluent that increases or reduce, ERR_MAVE (the can be negative) water yield is increased on the confluent setup parameter SP2 of the confluent setup parameter of the Semi-Autogenous valve that adds water, the confluent setup parameter of Semi-Autogenous flushing water valve, ball milling flushing water valve.
Valve actual confluent SP1=confluent setup parameter SP2+ERR_MAVE
Above-mentioned three valves all increase the water yield of ERR_MAVE.
The Semi-Autogenous flushing water valve regulated of Semi-Autogenous exhaust end is no more than the maximum stream flow (600M of the confluent setup parameter of Semi-Autogenous flushing water valve
3/ h), prevent Semi-Autogenous discharge from having some setbacks; The adjustment of the Semi-Autogenous valve that adds water of Semi-Autogenous feeding end is no more than the threshold value (height is limited to 84%, and lower bound is 82%) of Semi-Autogenous concentration setup parameter; When the adjustment of above-mentioned two valves exceedes its limit value, namely the actual confluent SP1 of valve has exceeded limit value, and the unnecessary water yield (can be negative) will be increased on the ball milling flushing water valve of ball mill ore discharging end.Three valves regulate simultaneously, can accelerate its response speed, and can increase the width of its runoff investigation, ball milling flushing water valve is main control valve simultaneously.
The adjustment of the Semi-Autogenous valve that adds water, Semi-Autogenous flushing water valve, ball milling flushing water valve three valves likely can cause the change of Pulp pump pond 8 liquid level, under desirable Pulp pump pit level setup parameter (3.0m-3.5m), the feed ore concentration of cyclone 10 (setup parameter of feed ore concentration is 59%-63%) can be made to be stablized, under desirable Pulp pump pit level, the feed ore concentration of cyclone about ideal value, can be conducive to the classification of cyclone substantially like this.When the actual pit level of Pulp pump exceedes the ceiling value (3.5m) of Pulp pump pit level setup parameter, Pulp pump 9 frequency can increase 0.1Hz automatically, after 20min, liquid level is still high, then continue to increase 0.1Hz, namely every 20min increases 0.1Hz, until the height that the pressure of cyclone 10 is greater than cyclone pressure setting parameter limits (85KPa) or cyclone excess flow to be greater than the high limit (4300m of cyclone excess flow setup parameter
3/ h).
When Pulp pump pit level is lower than the lower bound 3.0m of Pulp pump pit level setup parameter, every 20min Pulp pump frequency reduces 0.1Hz, until cyclone pressure is lower than the lower bound (70KPa) of cyclone pressure setting parameter.
The reduction of Pulp pump frequency is the same with increase, after reducing 0.1Hz, sees whether liquid level rises between 3.0m ~ 3.5m after 20min, if just no longer adjusted, if still just do not continue to adjust to limit value in this scope in this scope.
Grinding particle size controls automatically
The control of granularity is more important relative to the control of concentration, because the impact for flotation of granularity is larger, so the meaning that stable Control granularity more has than controlled concentration.And the control theory of the overflow granularity of cyclone 10 is said be more high better, too high certainly flotation is also had unfavorable, during actual industrial controls, basic Task-size Controlling is all on the low side, controls to reach more than the low limit value of the setup parameter of overflow granularity just passable as long as general.When concentration and Task-size Controlling clash, preferential guarantee overflow granularity, effluent concentration and then, namely sometimes operating mode is bad, sacrifice effluent concentration to exchange better overflow granularity for, the adjustment of overflow granularity regulates within the scope of the high-low limits of the setup parameter of effluent concentration.
The major control method of granularity:
1, cyclone 10 groups of number adjustment
When overflow granularity, lower than the lower bound of setup parameter, (granularity is limit higher than height, does not temporarily also meet, and does not generally also reach so good granularity, and requirement is that granularity is more high better; High-low limits is 50%-60%) time, first check which group cyclone also has do not work, if the cyclone do not worked in addition, then open one group of cyclone, check overflow granularity value after 20min, if still below lower bound, then continue out other one group, every 20min drives one group of cyclone, until all cyclones all end.The group number increasing cyclone is to increase more overflow machine meeting, also can increase sand setting amount simultaneously, make underproof grade enter ball mill 11 again and grind.
2, cyclone feed ore concentration value is again adjusted
Still effect is not had when all cyclones have all ended, now, check that the feed ore concentration of cyclone is in the limits of setup parameter, under normal circumstances, Pulp pump pond 8 liquid level (3.0m-3.5m) is within the scope of high-low limits, the feed ore concentration (59%-63%) of cyclone 10 can be stabilized within the scope of high-low limits, can ensure that cyclone 10 has better grading effect like this.If cyclone feed ore concentration is limit higher than the height of setup parameter, then will automatically revise the effluent concentration controlling value ND2=ND2-0.1 of cyclone, concentration diminishes, when ore deposit is measured constant, the water yield will increase automatically, if cyclone feed ore concentration is also higher than high limit after 10min, continue to subtract 0.1%, every 10min checks once, until effluent concentration is reduced to the submaximal concentration (setting concentration is 33%-39%) of setup parameter; Otherwise, then the setup parameter of cyclone effluent concentration can be improved.
3, last cyclone pressure adjusting
When above-mentioned two adjustment all reach limit value, namely cyclone is all opened, and feed ore concentration is between 59%-63%, and the overflow granularity of cyclone is still lower than lower bound, then the adjustment representing first two was lost efficacy.At this moment the feed force (if pressure does not reach the ceiling value of setup parameter) of cyclone is automatically increased, actual is the frequency (Pulp pump and cyclone one_to_one corresponding) improving Pulp pump, overflow granularity is observed again after 10min, if still do not reach more than the lower bound of setup parameter, then continue to improve cyclone feed force, until pressure reaches high limit (85KPa) of setup parameter.If occur that in the process promoted cyclone excess flow exceedes high limit (4300m
3/ h), now, the pressure of cyclone will no longer improve.
The setup parameter of each technological parameter in whole Row control, can according to the situation of technique change and actual field, artificially manual amendment, adjustment so just can be made to carry out in more rational scope, there will not be the situation because field apparatus and instrument break down and cause adjusting range excessive, the impact on producing can being made to reduce to minimum, making whole system operation more stable.
It is very complicated that ore grinding part controls, and the parameters in production procedure interacts.During manual operation, be not very clear and definite for the correlation between them, its adjustment is caused not have clear and definite foundation, can only be approximately estimate that a numerical value is artificially manual given, when operating mode changes, can not change be followed, when operating Deng operative employee, deflected away from a lot, and operator ceaselessly operates, labour intensity is large.Automatic control can well resist the interference of operating mode, ceaselessly Correction and Control output variable, makes ore milling concentration, granularity reaches optimum control effects, and automatic adjustment then can make whole grinding system be in all the time in an optimum dynamic equilibrium.
The foregoing is only the preferred embodiment of the application, be not limited to the application, for a person skilled in the art, the application can have various modifications and variations.Within all spirit in the application and principle, any amendment done, equivalent replacement, improvement etc., within the protection domain that all should be included in the application.
Claims (10)
1. an ore grinding enriched fineness control system, comprising:
Interface operation unit, input the setup parameter about ore milling concentration and granularity wherein, described setup parameter comprises effluent concentration setup parameter and the overflow granularity setup parameter of mine-supplying quantity setup parameter, confluent setup parameter, Semi-Autogenous concentration setup parameter and cyclone;
Detecting unit, be configured to detect the actual parameter about ore grinding enriched fineness, described actual parameter comprises: the actual effluent concentration of the actual mine-supplying quantity of mine-feeding equipment, the actual confluent of waterworks, cyclone and actual overflow granularity;
Central data processing unit, contrasts after being configured to described actual parameter and described setup parameter directly to carry out to contrast or process, obtains comparing result; And
PID control unit, be configured to the comparing result according to described central data processing unit, control the frequency of Pulp pump of the mine-supplying quantity of mine-feeding equipment, the confluent of waterworks and described cyclone upstream, make described actual effluent concentration and described actual overflow granularity within the scope of the effluent concentration setup parameter and overflow granularity setup parameter of setting.
2. ore grinding enriched fineness control system according to claim 1, wherein, described setup parameter also comprises the excess flow setup parameter of Pulp pump pit level setup parameter, the pressure setting parameter of described cyclone, the feed ore concentration setup parameter of described cyclone and described cyclone; Described confluent setup parameter comprises the confluent setup parameter of the Semi-Autogenous valve that adds water, the confluent setup parameter of Semi-Autogenous flushing water valve, the confluent setup parameter of ball milling flushing water valve; Described actual parameter also comprises the actual liquid level in Pulp pump pond, the actual feed ore concentration of described cyclone, actual pressure and actual excess flow, and the actual confluent of described waterworks comprises the actual confluent of the described Semi-Autogenous valve that adds water, described Semi-Autogenous flushing water valve, described ball milling flushing water valve; Described PID control unit also controls the working quantity of described cyclone.
3. ore grinding enriched fineness control system according to claim 2, wherein, described central data processing unit control described PID control unit adjust described mine-feeding equipment give ore deposit frequency, keep mine-supplying quantity stablize; When there is deviation in described actual effluent concentration and described effluent concentration setup parameter, calculate and contrast described confluent setup parameter and actual confluent, obtain the water yield needing to supplement, control the described Semi-Autogenous valve that adds water, described Semi-Autogenous flushing water valve, described ball milling flushing water valve adjust its respective confluent; The adjustment of the confluent of described Semi-Autogenous flushing water valve is no more than the threshold limit value of the confluent setup parameter of Semi-Autogenous flushing water valve, and the adjustment of the confluent of the described Semi-Autogenous valve that adds water is no more than the threshold value of described Semi-Autogenous concentration setup parameter; When the actual confluent of described Semi-Autogenous flushing water valve exceedes the threshold limit value of the confluent setup parameter of described Semi-Autogenous flushing water valve, when the actual confluent of the described Semi-Autogenous valve that adds water exceedes the threshold value of described Semi-Autogenous concentration setup parameter, the water yield that is unnecessary or that lack will control described ball milling flushing water valve by described PID control unit and regulate.
4. ore grinding enriched fineness control system according to claim 3, wherein, the Semi-Autogenous valve that adds water, Semi-Autogenous flushing water valve, the actual confluent of ball milling flushing water valve changes, when causing the actual liquid level in Pulp pump pond to exceed the peak of described Pulp pump pit level setup parameter, described central data processing unit increases described Pulp pump frequency by described PID control unit, until the actual excess flow that the pressure of described cyclone is greater than described cyclone pressure setting parameter peak or cyclone is greater than the minimum of described cyclone excess flow setup parameter peak or described Pulp pump pit level setup parameter, when the actual liquid level in Pulp pump pond is lower than the minimum of described Pulp pump pit level setup parameter, described central data processing unit reduces Pulp pump frequency by described PID control unit, until the actual pressure of cyclone is lower than the peak of described cyclone pressure setting parameter minimum or described Pulp pump pit level setup parameter.
5. the ore grinding enriched fineness control system according to any one in claim 1-4, wherein, when minimum lower than described cyclone overflow granularity setup parameter of the actual overflow granularity of cyclone, described central data processing unit opens one group in the cyclone do not worked by described PID control unit; Continue to detect, if during the minimum of the actual overflow granularity of cyclone still lower than described cyclone overflow granularity setup parameter, then open one group of cyclone do not worked, until all cyclones are all opened.
6. ore grinding enriched fineness control system according to claim 5, wherein, when all cyclones all open the actual overflow granularity that still can not control cyclone fall within the scope of described cyclone overflow granularity setup parameter time, check whether the actual feed ore concentration of cyclone is within the scope of described cyclone feed ore concentration setup parameter, when the actual feed ore concentration of cyclone is greater than described cyclone feed ore concentration setup parameter, described central data processing unit reduces the effluent concentration setup parameter of described cyclone automatically, described PID control unit can make respective response action, control the Semi-Autogenous valve that adds water, Semi-Autogenous flushing water valve and ball milling flushing water valve strengthen actual confluent, until stop when the actual overflow granularity of the actual effluent concentration of the cyclone effluent concentration setup parameter minimum or cyclone that reach described cyclone falls within the scope of described cyclone overflow granularity setup parameter, when the actual overflow granularity that above-mentioned action still can not control cyclone falls within the scope of the overflow granularity setup parameter of described cyclone, described central data processing unit controls the frequency that described PID control unit increases described Pulp pump, until the actual pressure of described cyclone reaches the peak of the pressure setting parameter of described cyclone, in the process, when the actual excess flow of cyclone is greater than the peak of described cyclone excess flow setup parameter, stop the frequency increasing described Pulp pump.
7. an ore grinding enriched fineness control method, wherein, described method comprises:
A. foresee steps: input the setup parameter about ore milling concentration and granularity in interface operation unit, described setup parameter comprises effluent concentration setup parameter and the overflow granularity setup parameter of mine-supplying quantity setup parameter, confluent setup parameter, Semi-Autogenous concentration setup parameter and cyclone;
B. detecting step: utilize detecting unit detection about the actual parameter of ore grinding enriched fineness, described actual parameter comprises: the actual effluent concentration of the actual mine-supplying quantity of mine-feeding equipment, the actual confluent of waterworks, cyclone and actual overflow granularity;
C. treatment step: the described actual parameter detected by described detecting unit is transferred to central data processing unit with the described setup parameter inputted by described interface operation unit, is contrasted by described central data processing unit; And
D. ore milling concentration rate-determining steps and grinding particle size rate-determining steps: according to the comparing result of described central data processing unit, controlled the frequency of Pulp pump of the adjustment mine-supplying quantity of mine-feeding equipment, the confluent of waterworks and described cyclone upstream by PID control unit, make described actual effluent concentration and described actual overflow granularity within the scope of the effluent concentration setup parameter and overflow granularity setup parameter of setting.
8. ore grinding enriched fineness control method according to claim 7, wherein, described setup parameter also comprises the excess flow setup parameter of Pulp pump pit level setup parameter, the pressure setting parameter of described cyclone, the feed ore concentration setup parameter of described cyclone and described cyclone; Described confluent setup parameter comprises the confluent setup parameter of the Semi-Autogenous valve that adds water, the confluent setup parameter of Semi-Autogenous flushing water valve, the confluent setup parameter of ball milling flushing water valve; Described actual parameter also comprises the actual liquid level in Pulp pump pond, the actual feed ore concentration of described cyclone, actual pressure and actual excess flow, and the actual confluent of described waterworks comprises the actual confluent of the described Semi-Autogenous valve that adds water, described Semi-Autogenous flushing water valve, described ball milling flushing water valve; Described PID control unit also controls the working quantity of described cyclone.
9. ore grinding enriched fineness control method according to claim 8, wherein, described ore milling concentration rate-determining steps is:
Described central data processing unit control described PID control unit adjust described mine-feeding equipment give ore deposit frequency, keep mine-supplying quantity constant, when there is deviation in described actual effluent concentration and described effluent concentration setup parameter, calculate and contrast described confluent setup parameter and actual confluent, obtain the water yield needing to supplement, control the described Semi-Autogenous valve that adds water, described Semi-Autogenous flushing water valve, described ball milling flushing water valve adjust its respective confluent;
The actual confluent of described Semi-Autogenous flushing water valve is no more than the threshold limit value of the adjustment setup parameter of the confluent of Semi-Autogenous flushing water valve, and the adjustment of the confluent of the described Semi-Autogenous valve that adds water is no more than the threshold value of described Semi-Autogenous concentration setup parameter; When the actual confluent of described Semi-Autogenous flushing water valve exceedes the threshold limit value of the confluent setup parameter of described Semi-Autogenous flushing water valve, when the actual confluent of the described Semi-Autogenous valve that adds water exceedes the threshold value of described Semi-Autogenous concentration setup parameter, the water yield that is unnecessary or that lack will control described ball milling flushing water valve by described PID control unit and regulate;
The actual confluent of the Semi-Autogenous valve that adds water, Semi-Autogenous flushing water valve, ball milling flushing water valve changes, when causing the actual liquid level in Pulp pump pond to exceed the peak of described Pulp pump pit level setup parameter, described central data processing unit increases described Pulp pump frequency by described PID control unit, until the actual excess flow that the actual pressure of described cyclone is greater than described cyclone pressure setting parameter peak or cyclone is greater than the minimum of described cyclone excess flow setup parameter peak or described Pulp pump pit level setup parameter; When the actual liquid level in Pulp pump pond is lower than the minimum of described Pulp pump pit level setup parameter, described central data processing unit reduces Pulp pump frequency by described PID control unit, until the actual pressure of cyclone is lower than the peak of described cyclone pressure setting parameter minimum or described Pulp pump pit level setup parameter.
10. ore grinding enriched fineness control method according to claim 8, wherein, described grinding particle size rate-determining steps is:
When minimum lower than described cyclone overflow granularity setup parameter of the actual overflow granularity of cyclone, described central data processing unit opens one group in the cyclone do not worked by described PID control unit; Continue to detect, if during the minimum of the actual overflow granularity of cyclone still lower than described cyclone overflow granularity setup parameter, then open one group of cyclone do not worked, until all cyclones are all opened;
When all cyclones all open the actual overflow granularity that still can not control cyclone fall within the scope of described cyclone overflow granularity setup parameter time, check whether the actual feed ore concentration of cyclone is within the scope of described cyclone feed ore concentration setup parameter, when the actual feed ore concentration of cyclone is greater than described cyclone feed ore concentration setup parameter, described central data processing unit reduces the effluent concentration setup parameter of described cyclone automatically, described PID control unit can make respective response action, control the Semi-Autogenous valve that adds water, Semi-Autogenous flushing water valve and ball milling flushing water valve strengthen actual confluent, the actual feed ore concentration of cyclone is made to be within the scope of described cyclone feed ore concentration setup parameter, otherwise, then regulate until stop when the actual overflow granularity of the actual effluent concentration of the cyclone effluent concentration setup parameter minimum or cyclone that reach described cyclone falls within the scope of described cyclone overflow granularity setup parameter, when the actual overflow granularity that above-mentioned action still can not control cyclone falls within the scope of the overflow granularity setup parameter of described cyclone, described central data processing unit controls the frequency that described PID control unit increases described Pulp pump, until the actual overflow granularity of cyclone falls within the scope of described cyclone overflow granularity setup parameter, otherwise, the actual pressure of described cyclone is then regulated to reach the peak of the pressure setting parameter of described cyclone, in the process, when the actual excess flow of cyclone is greater than the peak of described cyclone excess flow setup parameter, stop the frequency increasing described Pulp pump.
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