CN101950171B - Intelligent hierarchical control method and control device for ore grinding in concentration plant - Google Patents
Intelligent hierarchical control method and control device for ore grinding in concentration plant Download PDFInfo
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Abstract
The invention relates to the technical field of ore grinding control in a concentration plant, in particular to an intelligent hierarchical control method and a control device for ore grinding in a concentration plant. The control method comprises the following program processes: controlling system initialization; judging whether ore feeding quantity control is implemented or not; implementing ore feeding quantity PID control; judging whether ore water feeding control is implemented or not; implementing the ore water feeding control; judging whether ore water discharging control is implemented or not; implementing the ore water discharging control; judging whether cyclone inlet pulp density and water replenishing cascade control is implemented or not; judging whether pump sump liquid level control is implemented or not; implementing the pump sump liquid level control; judging whether the ore grinding process is finished or not; finishing the ore grinding process; judging whether to return or not; and carrying out interconnected control on each processing device. The device comprises an upper computer, a lower computer, a detecting instrument and an executing mechanism. The invention enables the system to have the characteristics of high control accuracy, high regulating speed, strong interference resistance, stability, reliability and the like, accurately regulates the operating parameters in real time, and improves the working efficiency and the product quality of grinding classification.
Description
Technical field
The present invention relates to ore grinding control technology field, ore dressing plant, particularly a kind of ore dressing plant ore grinding intelligence hierarchical control method and opertaing device.
Background technology
Grinding procedure mainly is with the particle of ore through milled processed beading degree level, offers ore-dressing technique, prepares to meet the raw material of ore dressing production granularity for ore-dressing technique, is the preparatory process of ore-dressing technique.After the grinding of ore process physics, the classification, particle is varied down to certain degree, just can reach the monomer dissociation of ore or be similar to monomer dissociation, and in theory, grinding particle size more carefully helps the metal recovery and the metal enrichment of ore-dressing technique more.Therefore grinding process is to influence the key link that ore dressing is produced, and it is directly restricting dressing product quality and metal recovery rate.But grinding particle size is thin more, and its energy consumption is big more, and the grinding process energy consumption accounts for 40% ~ 60% of the whole ore dressing process in ore dressing plant.Therefore, when guaranteeing grinding particle size, also to cut down the consumption of energy as much as possible, save material.In order to improve grinding efficiency, to save energy and reduce the cost, improve the economic benefit in concentrate grade and the recovery and raising ore dressing plant, realize that the automatic control of grinding process has crucial economic implications.
As shown in Figure 1, grinding process generally is divided into two sections and grinds and classification.First section ore grinding generally adopts autogenous grinding or Semi-Autogenous mode; The ore that mining factory is shipped than bulk tentatively grinds; Iron ore slurry after the grinding carries out classification through one section cyclone, and its overflow flows to the next stage ore grinding, and its underflow turns back to first section autogenous tumbling mill and grinds again.Second section ore grinding adopts ball milling method, and the iron ore that first section autogenous tumbling mill ground continues to grind, and carries out classification once more through two sections cyclones then, and its overflow flows to mineral processing circuit, and its underflow turns back to second section bowl mill and grinds again.
Along with international iron ore price goes up significantly, the exploitation of China's iron ore and sort and highlight increasing economic worth and strategic value.And the quality of grind grading directly influences the grade height of ore dressing finished product, so the classification of grind grading intelligence has very important vital role.Yet what partly taked grind grading in present most of ore dressing plants is simple control automatically, even still adopts manually operated method, and not only efficient is low, and error is also bigger.
Summary of the invention
The objective of the invention is to overcome top said problem, a kind of ore dressing plant ore grinding intelligence hierarchical control method is provided, can better improve the effect of grind grading, thereby enhance productivity greatly, reduce cost.
Another object of the present invention provides a kind of ore dressing plant ore grinding intelligence step control equipment.
Ore dressing plant of the present invention ore grinding intelligence hierarchical control method is characterized in that comprising following program circuit:
1) control system initialization,
2) judge whether to implement mine-supplying quantity control, judgement is, then implements mine-supplying quantity PID control,
3) judge whether to implement mine-supplying quantity PID control and finish, then judge whether to implement to mineral water control, judgement is, then implement to mineral water control,
4) judge whether to implement that control finishes to mineral water, then judge whether to implement the ore discharge water management, judgement is, then implements the ore discharge water management,
5) judge whether to implement the ore discharge water management and finish, then judge whether to implement cyclone inlet pulp density and add the control of water tandem, judgement is, then implement cyclone inlet pulp density and add the control of water tandem,
6) judge whether to implement cyclone inlet pulp density and add the control of water tandem and finish, then judge whether to implement the control of pump pit level, judgement is, then implements the control of pump pit level,
7) judge whether to implement the control of pump pit level and finish, judge then whether ore grinding finishes, judgement is that then ore grinding finishes, and judges not, then returns the 1st) step,
8) each process equipment is carried out interlocked control.
When system was in described interlocked control state, according to the flow process of grinding process, the backward that realizes each process equipment starts with order stopped, and the stopping in emergency of total system, and each technology interlock device realizes that interlocking stops simultaneously.For example, described interlocked control is that the load interlocking of ore feeder and one section autogenous grinding and two sections ball millings starts or stops, and when " tripe expands " appearred in one section autogenous grinding, control system stopped to the ore deposit automatically, after " tripe expands " solves, recovered to give the ore deposit automatically.When " tripe expands " appears in two sections ball millings, control system also will stop to the ore deposit automatically, and stop one section autogenous grinding operation, after " tripe expands " solves, recover automatically to give the ore deposit and move from bowl mill.So-called " tripe expands " is exactly that the interior ore of ball bowl mill is too much, and the ball bowl mill can not normally be moved.
Described mine-supplying quantity PID is controlled to be respectively and claims that with mine-supplying quantity setting value, belt value of feedback is input to the PID controller; The output quantity of PID controller outputs to vibrofeeder, and mine-supplying quantity should be made up of belt conveyer scale and vibrofeeder to the plant equipment in ore control loop by controlling for the ore control loop; Should directly control the frequency converter of vibrofeeder to the output valve in ore control loop; Regulate the rotating speed of vibrofeeder through frequency converter, thereby regulate mine-supplying quantity, should be provided with manual control and two kinds of control modes of automatic control type to the ore control loop; When ordinary production, use automatic control mode, when overhauling and safeguarding, use manual control mode.
Described cyclone inlet pulp density with add the water tandem and be controlled to be respectively and claim that with pulp density setting value, pulp density value of feedback is input to one-level PID controller; The output quantity of one-level PID controller is input to secondary PID controller as adding the discharge setting value with adding the discharge value of feedback, and the output of secondary PID controller is used for control and adds Water flow adjusting valve; The pid control circuit that water management is a closed loop is added in the pump pond; The pid control circuit of this closed loop is made up of flowmeter and motorized valve, through the value of feedback of adding the water pipe flow is regulated electrically operated valve, thereby realizes the water yield of adding in control pump pond; The concentration control of pump pond also is a pid control circuit; Add the water management loop by densimeter and pump pond and constitute tandem control jointly, its principal parameter is a pump pond concentration, and second parameter is that discharge is added in the pump pond; When the pump pond was added water management loop and concentration control loop and is arranged to automated manner simultaneously, this moment, tandem control brought into operation.
Describedly be controlled to be bowl mill to mineral water and give the control of mineral water flow mathematical model; By giving the control of mineral water control loop; This control loop is made up of flowmeter and motorized valve; This loop is through the feedback of drainpipe flow being regulated the size of motorized valve aperture, thereby the mineral water flow is given in control, and this control loop also is a pid control circuit; But the setting value of amount of water is through parameters such as the total amount of bowl mill materials inside and water percentage are set up mathematical model, and bowl mill adds the mathematical model that discharge calculates to the ore deposit and is:
That is:
Wherein: F: bowl mill is given the ore deposit amount of water;
W
1: bowl mill raw ore mine-supplying quantity;
W
2: bowl mill sand return amount;
M
1: feed ore concentration;
M
2: sand return concentration;
M
3: ore milling concentration;
C: sand return ratio.
The humidity, sand return amount and the sand return humidity that should be pointed out that supposition ore in this system are stable, and above-mentioned model could be effectively.Draw through calculated with mathematical model, and have only when this control loop under automatic running status, the setting value that could use calculated with mathematical model to draw.Above-mentioned various in concrete parameter confirm according to concrete mine conditions is different.
Described mine-supplying quantity is controlled to be the fuzzy control of mine-supplying quantity and other parameter, and Fuzzy control system is adjusted mine-supplying quantity and other parameter automatically according to the running status of ball bowl mill, when system is in fuzzy control; Control system is with automatic power and Changing Pattern thereof according to bowl mill; Judge the running status of bowl mill, promptly when the power increase, the ore grinding quantitative change in the bowl mill is big; Should reduce the setting value of bowl mill mine-supplying quantity this moment, thereby the ore grinding amount in the bowl mill is met the requirements of in the scope.Otherwise when the power minimizing, the ore grinding quantitative change in the bowl mill is little, and should increase the setting value of bowl mill mine-supplying quantity this moment, thereby the ore grinding amount in the bowl mill is met the requirements of in the scope.Under the fuzzy control state, according to the condition of production, whenever change a setup parameter at a distance from one period regular time, interval time should be decided according to on-the-spot practical condition, and general adjustment in 25～35 minutes at interval once.
Described mine-supplying quantity is controlled to be the fuzzy control of regulating mine-supplying quantity according to the power of bowl mill and rate of change thereof.Fuzzy system inquires about to confirm mine-supplying quantity according to the variable power e and the rate of change ec of bowl mill through fuzzy rule.
Design of Fuzzy Control System:
(1) linguistic variable of fuzzy control
The same with most of Fuzzy control systems, we adopt the system architecture of the single output of dual input, because voltage is constant, we come the variation of consideration of power through monitoring current.In this Fuzzy control system; We are with the electric current of reality and the variable quantity ec of the deviation e between the electric current of operate as normal and deviation is as input in theory, and the variable quantity of mine-supplying quantity
is as output.
(2) the assignment table of input language variable error e, error rate ec and output language variable
The basic domain of linguistic variable current deviation e is elected [20A as; + 20A]; The basic domain of deviation variation rate ec is elected [4A as; + 4A], the basic domain of mine-supplying quantity variable quantity
is elected [12t/h ,+12t/h] as.The domain of the fuzzy set of selected
is { 6;-5;-4;-3;-2;-1,0,1; 2; 3,4,5; 6}; The quantizing factor of deviation e
then, the quantizing factor of deviation variation rate ec
is given the scale factor
of ore deposit variable quantity
.The language value of these three linguistic variables is all chosen 7 language value: PB, PM, PS, ZE, NS, NM, NB.
Rule of thumb; Can confirm on each domain in order to describe fuzzy subset PB; PM, PS, ZE; NS; NM, the membership function of NB
, and it is as shown in table 1 to set up the assignment table of linguistic variable e in view of the above; The assignment table of ec is as shown in table 2, and the assignment table of
is as shown in table 3.
Based on summary of experience, draw the control law that one group of 49 fuzzy condition statement constitutes, these fuzzy condition statements are concluded, set up the fuzzy control state table of reflection ball bowl mill mine-supplying quantity control system, as shown in table 4.
Each bar fuzzy condition statement that fringe table 4 comprises all determines a fuzzy relation, and they have 49, promptly
Through the union of 49 fuzzy relations, obtain total fuzzy relation and be:
Based on the reasoning composition rule, and use the maximum membership degree method this fuzzy set is carried out fuzzy judgment, we set up question blank as shown in table 5.
Like this; Through the PLC program; In each sampling period; Deviate
and deviation change
through calculating; Multiply by quantizing factor separately respectively; Obtain required e of question blank and ec, and then find corresponding
, multiply by scale factor; Promptly obtain the variable quantity of actual mine-supplying quantity; Add original mine-supplying quantity, be the mine-supplying quantity of the ball bowl mill of current PLC output, realized the automatic control of ball bowl mill mine-supplying quantity like this.
A kind of equipment that is used for described ore dressing plant ore grinding intelligence hierarchical control method; It is characterized in that comprising host computer; Through the EPA joining slave computer of host computer therewith; Through controlling the net joining measuring instrument of slave computer, topworks therewith, form the control system that integrates functions such as detection, control, monitoring management.
Described slave computer is the PLC system, comprises power module, the joining CPU of power module therewith, joining, the one group of I/O template being set up in parallel of power module, CPU therewith respectively.
Described measuring instrument comprises to the ore deposit flow instrumentation, adds discharge measuring instrument, bowl mill bearing temperature measuring instrument, pump pit level measuring instrument, cyclone entrance concentration measuring instrument for mineral water flow instrumentation, ore discharge discharge measuring instrument, pump pond.
Described topworks comprises device start/shut-down mechanism, frequency control mechanism, valve regulated mechanism.
Host computer major control function comprises that grinding process control flow chart, control panel operation, real time data demonstration, equipment running status demonstration, motorized valve control, alarm indication, equipment open/stops, control mode is selected and multinomial function such as audio alert.Slave computer is responsible for data acquisition and control, can break away from upper main frame and work alone, and host computer is responsible for the monitoring management of control system, and host computer carries out communication through a built-in EPA network interface card and slave computer.
Software system design of the present invention comprises the Control Software of slave computer PLC and the monitoring software design of host computer.The design of PLC Control Software mainly comprises writing of Hardware configuration and parameter setting, communication definitions and user program etc.The control program of native system is mainly controlled, is added water management to mineral water control, ore discharge water management, pump pond by master routine and the sequential control of bowl mill ore feeder, mine-supplying quantity.Subroutine modules such as the control of cyclone entrance concentration, the control of pump pit level control enclosure motorized valve constitute.Whether each subroutine call will be judged according to the relevant controlled variable that host computer passes down.Design 1s interrupt routine module and 100ms cycle interruption handler module in addition; Wherein the 1s interrupt routine is used for realizing the fuzzy control and the parameter warning function of bowl mill, and 100ms cycle interruption handling procedure is used for realizing the calculating of data sampling and bowl mill reference current value and the functions such as " tripe expands " judgement of bowl mill.
Have high reliability, high anti-jamming capacity in order to ensure control system, native system has adopted different control methods such as interlocked control, PID control, tandem control, mathematical model control, fuzzy control, realizes the intellectuality control of grind grading jointly.
When system was in the interlocked control state, according to the flow process of grinding process, the backward that realizes each process equipment starts with order stopped, and the stopping in emergency of total system, and each technology interlock device realizes that interlocking stops simultaneously.For example, ore feeder and one section load interlocking from break-in and two sections ball millings start or stop, and when " tripe expands " appearred in one section autogenous grinding, control system stopped to the ore deposit automatically, after " tripe expands " solves, recovered to give the ore deposit automatically.When " tripe expands " appears in two sections ball millings, control system also will stop to the ore deposit automatically, and stop one section autogenous grinding operation, after " tripe expands " solves, recover to give ore deposit and bowl mill operation automatically.
Now, the develop rapidly of Along with computer technology, at present the PLC of most of world-famous brands can both satisfy to big inertia, the time become, nonlinear grind grading process realizes intelligent control.
Characteristics such as the present invention has adopted interlocked control, and different control methods such as tandem control, fuzzy control make system have the control accuracy height, and governing speed is fast, antijamming capability is strong, reliable and stable.Use this method control grinding process have easy to operate, control flexibly, reliable in quality, powerful, can regulate operating parameter real-time and accurately, and then improve the work efficiency and the product quality of grind grading, economic benefit and obvious social benefit raising.
Description of drawings
Fig. 1 is the grinding process process flow diagram.
Fig. 2 is a control method process flow diagram of the present invention.
Fig. 3 is a PID control synoptic diagram of the present invention.
Fig. 4 is a tandem control synoptic diagram of the present invention.
Fig. 5 is a device structure block diagram of the present invention.
Embodiment
Further specify embodiment of the present invention below in conjunction with accompanying drawing.
As shown in Figure 1, grinding process generally is divided into two sections and grinds and classification.First section ore grinding generally adopts autogenous grinding or Semi-Autogenous mode; The ore that mining factory is shipped than bulk tentatively grinds; Iron ore slurry after the grinding carries out classification through one section cyclone, and its overflow flows to the next stage ore grinding, and its underflow turns back to first section autogenous tumbling mill and grinds again.Second section ore grinding adopts ball milling method, and the iron ore that first section autogenous tumbling mill ground continues to grind, and carries out classification once more through two sections cyclones then, and its overflow flows to mineral processing circuit, and its underflow turns back to second section bowl mill and grinds again.
As shown in Figure 2, ore dressing plant of the present invention ore grinding intelligence hierarchical control method is characterized in that comprising following program circuit:
1) control system initialization,
2) judge whether to implement mine-supplying quantity control, judgement is, then implements mine-supplying quantity PID control,
3) judge whether to implement mine-supplying quantity PID control and finish, then judge whether to implement to mineral water control, judgement is, then implement to mineral water control,
4) judge whether to implement confluent control and finish, judge whether to implement the ore discharge water management, judgement is, then implements the ore discharge water management,
5) judge whether to implement water discharge control and finish, then judge whether to implement cyclone inlet pulp density and add the control of water tandem, judgement is, then implement cyclone inlet pulp density and add the control of water tandem,
6) judge whether to implement cyclone inlet pulp density and add the control of water tandem and finish, then judge whether to implement the control of pump pit level, judgement is, then implements the control of pump pit level,
7) judge whether to implement the control of pump pit level and finish, judge then whether ore grinding finishes, judgement is that then ore grinding finishes, and judges not, then returns the 1st) step,
8) each process equipment is carried out interlocked control.
When system was in described interlocked control state, according to the flow process of grinding process, the backward that realizes each process equipment starts with order stopped, and the stopping in emergency of total system, and each technology interlock device realizes that interlocking stops simultaneously.For example, described interlocked control is that the load interlocking of ore feeder and one section autogenous grinding and two sections ball millings starts or stops, and when " tripe expands " appearred in one section autogenous grinding, control system stopped to the ore deposit automatically, after " tripe expands " solves, recovered to give the ore deposit automatically.When " tripe expands " appears in two sections ball millings, control system also will stop to the ore deposit automatically, and stop one section autogenous grinding operation, after " tripe expands " solves, recover to give ore deposit and autogenous tumbling mill operation automatically.
As shown in Figure 3, described mine-supplying quantity PID is controlled to be respectively and claims that with mine-supplying quantity setting value, belt value of feedback is input to the PID controller, and the output quantity of PID controller outputs to vibrofeeder; Mine-supplying quantity is by controlling for the ore control loop; The plant equipment of this control loop is made up of belt conveyer scale and vibrofeeder, should directly control the frequency converter of vibrofeeder to the output valve in ore control loop, regulates the rotating speed of vibrofeeder through frequency converter; Thereby adjusting mine-supplying quantity; Be somebody's turn to do to the ore control loop and be provided with two kinds of control modes of manual control and automatic control, when ordinary production, use automatic control mode, when overhauling and safeguarding, use manual control mode.
As shown in Figure 4, described cyclone inlet pulp density with add the water tandem and be controlled to be respectively and claim that with pulp density setting value, pulp density value of feedback is input to one-level PID controller, the output quantity of one-level PID controller is as adding the discharge setting value; Be input to secondary PID controller with adding the discharge value of feedback, the output of secondary PID controller is used for control and adds Water flow adjusting valve, and the pid control circuit that water management is a closed loop is added in the pump pond; The pid control circuit of this closed loop is made up of flowmeter and motorized valve; Through the value of feedback of adding the water pipe flow is regulated electrically operated valve, thereby realize the water yield of adding in control pump pond, concentration control in pump pond also is a pid control circuit; Add the water management loop by densimeter and pump pond and constitute tandem control jointly; Its principal parameter is a pump pond concentration, and second parameter is that discharge is added in the pump pond, when the pump pond is added water management loop and concentration control loop and is arranged to automated manner simultaneously; This moment, tandem control brought into operation
Describedly be controlled to be grinding machine to mineral water and give the control of mineral water flow mathematical model; By giving the control of mineral water control loop; This control loop is made up of flowmeter and motorized valve; This loop is through the feedback of drainpipe flow being regulated the size of motorized valve aperture, thereby the mineral water flow is given in control, and this control loop also is a pid control circuit; But the setting value of amount of water is through parameters such as the total amount of grinding machine materials inside and water percentage are set up mathematical model, and grinding machine adds the mathematical model that discharge calculates to the ore deposit and is:
That is:
Wherein: F: grinding machine is given the ore deposit amount of water;
W
1: grinding machine raw ore mine-supplying quantity;
W
2: grinding machine sand return amount;
M
1: feed ore concentration;
M
2: sand return concentration;
M
3: ore milling concentration;
C: sand return ratio.
The humidity, sand return amount and the sand return humidity that should be pointed out that supposition ore in this system are stable, and above-mentioned model could be effectively.Draw through calculated with mathematical model, and have only when this control loop under automatic running status, the setting value that could use calculated with mathematical model to draw.Above-mentioned various in concrete parameter confirm according to concrete mine conditions is different.
Described mine-supplying quantity is controlled to be the fuzzy control of mine-supplying quantity and other parameter; Fuzzy control system is adjusted mine-supplying quantity and other parameter automatically according to the running status of bowl mill, and when system was in fuzzy control, control system was with automatic power and Changing Pattern thereof according to bowl mill; Judge the running status of bowl mill; The ore grinding quantitative change that promptly increases in the bowl mill when power is big, and should reduce the setting value of bowl mill mine-supplying quantity this moment, thereby the ore grinding amount in the bowl mill is met the requirements of in the scope.Otherwise little when the ore grinding quantitative change that power reduces in the bowl mill, should increase the setting value of bowl mill mine-supplying quantity this moment, thereby the ore grinding amount in the bowl mill is met the requirements of in the scope.Under the fuzzy control state, according to the condition of production, whenever change a setup parameter at a distance from one period regular time, interval time should be decided according to on-the-spot practical condition, and general adjustment in about 25～35 minutes at interval once.
Described mine-supplying quantity is controlled to be the fuzzy control of regulating mine-supplying quantity according to the power of bowl mill and rate of change thereof.Fuzzy system inquires about to confirm mine-supplying quantity according to the variable power e and the rate of change ec of bowl mill through fuzzy rule.
Design of Fuzzy Control System:
(1) linguistic variable of fuzzy control
The same with most of Fuzzy control systems, we adopt the system architecture of the single output of dual input, because voltage is constant, come the variation of consideration of power through monitoring current.In this Fuzzy control system; With the electric current of reality with the variable quantity ec of the deviation e between the electric current of operate as normal and deviation is as input in theory, the variable quantity of mine-supplying quantity
is as output.
(2) the assignment table of input language variable error e, error rate ec and output language variable
The basic domain of linguistic variable current deviation e is elected [20A as; + 20A]; The basic domain of deviation variation rate ec is elected [4A as; + 4A], the basic domain of mine-supplying quantity variable quantity
is elected [12t/h ,+12t/h] as.The domain of the fuzzy set of selected
is { 6;-5;-4;-3;-2;-1,0,1; 2; 3,4,5; 6}; The quantizing factor of deviation e
then, the quantizing factor of deviation variation rate ec
is given the scale factor
of ore deposit variable quantity
.The language value of these three linguistic variables is all chosen 7 language value: PB, PM, PS, ZE, NS, NM, NB.
Rule of thumb; Can confirm on each domain in order to describe fuzzy subset PB; PM, PS, ZE; NS; NM, the membership function of NB
, and it is as shown in table 1 to set up the assignment table of linguistic variable e in view of the above; The assignment table of ec is as shown in table 2, and the assignment table of
is as shown in table 3.
Based on summary of experience, draw the control law that one group of 49 fuzzy condition statement constitutes, these fuzzy condition statements are concluded, set up the fuzzy control state table of reflection ball bowl mill mine-supplying quantity control system, as shown in table 4.
Through the union of 49 fuzzy relations, obtain total fuzzy relation and be:
Based on the reasoning composition rule, and use the maximum membership degree method this fuzzy set is carried out fuzzy judgment, set up question blank as shown in table 5.
Like this; Through the PLC program; In each sampling period; Deviate
and deviation change
through calculating; Multiply by quantizing factor separately respectively; Obtain required e of question blank and ec, and then find corresponding
, multiply by scale factor; Promptly obtain the variable quantity of actual mine-supplying quantity; Add original mine-supplying quantity, be the mine-supplying quantity of the bowl mill of current PLC output, realized the automatic control of bowl mill mine-supplying quantity like this.
As shown in Figure 5; A kind of equipment that is used for described ore dressing plant ore grinding intelligence hierarchical control method is characterized in that comprising host computer, through the EPA joining slave computer of host computer therewith; Through controlling the net joining measuring instrument of slave computer, topworks therewith; Form collection and detect, functions such as control, monitoring management are in the control system of one
Described slave computer is the PLC system, comprises power module, the joining CPU of power module therewith, and joining, the one group of I/O template being set up in parallel of power module, CPU therewith respectively,
Described measuring instrument comprises to the ore deposit flow instrumentation, adds discharge measuring instrument, bowl mill bearing temperature measuring instrument, pump pit level measuring instrument, cyclone entrance concentration measuring instrument for mineral water flow instrumentation, ore discharge discharge measuring instrument, pump pond
Described topworks comprises device start/shut-down mechanism, frequency control mechanism, valve regulated mechanism.
Characteristics such as the present invention has adopted interlocked control, and different control methods such as tandem control, fuzzy control make system have the control accuracy height, and governing speed is fast, antijamming capability is strong, reliable and stable.Use this method control grinding process have easy to operate, control flexibly, reliable in quality, powerful, can regulate operating parameter real-time and accurately, and then improve the work efficiency and the product quality of grind grading, economic benefit and obvious social benefit raising.
Claims (6)
1. ore dressing plant ore grinding intelligence hierarchical control method is characterized in that comprising following program circuit:
1) control system initialization,
2) judge whether to implement mine-supplying quantity control, judgement is, then implements mine-supplying quantity PID control,
Described mine-supplying quantity PID is controlled to be respectively and claims that with mine-supplying quantity setting value, belt value of feedback is input to the PID controller, and the output quantity of PID controller outputs to vibrofeeder, and described mine-supplying quantity is by controlling for the ore control loop; Should form by belt conveyer scale and vibrofeeder to the plant equipment in ore control loop; Should directly control the frequency converter of vibrofeeder to the output valve in ore control loop, regulate the rotating speed of vibrofeeder, thereby regulate mine-supplying quantity through frequency converter; Should be provided with manual control and control two kinds of control modes automatically to the ore control loop; When ordinary production, use automatic control mode, when overhauling and safeguarding, use manual control mode
3) judge whether to implement mine-supplying quantity PID control and finish, then judge whether to implement to mineral water control, judgement is, then implement to mineral water control,
Describedly be controlled to be bowl mill to mineral water and give the control of mineral water flow mathematical model, by giving the control of mineral water control loop, this control loop is made up of flowmeter and motorized valve; This control loop is through the feedback of drainpipe flow being regulated the size of motorized valve aperture; Thereby the mineral water flow is given in control, and this control loop also is a pid control circuit, but the setting value of amount of water is to set up mathematical model through total amount and water percentage to the bowl mill materials inside; Draw through calculated with mathematical model; And have only when this control loop under automatic running status, the setting value that could use calculated with mathematical model to draw
4) judge whether to implement that control finishes to mineral water, judge whether to implement the ore discharge water management, judgement is, then implements the ore discharge water management,
5) judge whether to implement the ore discharge water management and finish, then judge whether to implement cyclone inlet pulp density and add the control of water tandem, judgement is, then implement cyclone inlet pulp density and add the control of water tandem,
6) judge whether to implement cyclone inlet pulp density and add the control of water tandem and finish, then judge whether to implement the control of pump pit level, judgement is, then implements the control of pump pit level,
Described cyclone inlet pulp density with add the water tandem and be controlled to be respectively and claim that with pulp density setting value, pulp density value of feedback is input to one-level PID controller, the output quantity of one-level PID controller is input to secondary PID controller as adding the discharge setting value with adding the discharge value of feedback; The output of secondary PID controller is used for control and adds Water flow adjusting valve; The pid control circuit that water management is a closed loop is added in the pump pond, and the pid control circuit of this closed loop is made up of flowmeter and motorized valve, through the value of feedback of adding the water pipe flow is regulated electrically operated valve; Thereby realize the water yield of adding in control pump pond; The concentration control of pump pond also is a pid control circuit, adds the water management loop by densimeter and pump pond and constitutes tandem control jointly, and its principal parameter is a pump pond concentration; Second parameter is that discharge is added in the pump pond; When the pump pond was added water management loop and concentration control loop and is arranged to automated manner simultaneously, this moment, tandem control brought into operation
7) judge whether to implement the control of pump pit level and finish, judge then whether ore grinding finishes, judgement is that then ore grinding finishes, and judges not, then returns the 1st) step,
8) each process equipment is carried out interlocked control.
2. ore dressing plant according to claim 1 ore grinding intelligence hierarchical control method; It is characterized in that when control system is in described interlocked control state; Flow process according to grinding process; The backward that realizes each process equipment starts with order stops, and the stopping in emergency of The whole control system, and each technology interlock device realizes that interlocking stops simultaneously.
3. ore dressing plant according to claim 1 ore grinding intelligence hierarchical control method is characterized in that described mine-supplying quantity is controlled to be the fuzzy control of mine-supplying quantity and other parameter, and Fuzzy control system is adjusted mine-supplying quantity and other parameter automatically according to the running status of bowl mill; When system is in fuzzy control, control system will be judged the running status of bowl mill automatically according to the power and the Changing Pattern thereof of bowl mill; Promptly when the power increase, the ore grinding quantitative change in the bowl mill is big, and should reduce the setting value of bowl mill mine-supplying quantity this moment; Thereby the ore grinding amount in the bowl mill is met the requirements of in the scope, otherwise when the power minimizing, the ore grinding quantitative change in the bowl mill is little; Should increase the setting value of bowl mill mine-supplying quantity this moment; Thereby the ore grinding amount in the bowl mill is met the requirements of in the scope, under the fuzzy control state, according to the condition of production; Whenever change a setup parameter at a distance from one period regular time, interval time should be decided to be adjustment in per 25～35 minutes once according to on-the-spot practical condition.
4. the ore dressing plant ore grinding intelligence hierarchical control method of stating according to claim 1 is characterized in that described interlocked control is that the load interlocking of ore feeder and one section autogenous grinding and two sections ball millings starts or stops, when " bloated tripe " appears in one section autogenous grinding; Control system stops to the ore deposit automatically; After " tripe expands " solves, recover to give the ore deposit automatically, when " tripe expands " appears in two sections ball millings; Control system also will stop to the ore deposit automatically; And stop one section autogenous grinding operation, after " tripe expands " solves, recover to give ore deposit and autogenous tumbling mill operation automatically.
5. the ore dressing plant ore grinding intelligence hierarchical control method of stating according to claim 1 is characterized in that described mathematical model is:
That is:
Wherein: F: bowl mill is given the ore deposit amount of water,
W
1: bowl mill raw ore mine-supplying quantity,
W
2: bowl mill sand return amount,
M
1: feed ore concentration,
M
2: sand return concentration,
M
3: ore milling concentration,
C: sand return ratio.
6. ore dressing plant according to claim 3 ore grinding intelligence hierarchical control method is characterized in that described fuzzy control for realizing the automatic control of bowl mill mine-supplying quantity, and correlation parameter comprises electric current, the mine-supplying quantity of bowl mill, the bowl mill sand return amount of bowl mill; Control system is judged the running status of bowl mill automatically according to the power and the Changing Pattern thereof of bowl mill, promptly when the power increase; Ore grinding quantitative change in the bowl mill is big, and reduce the setting value of bowl mill mine-supplying quantity this moment, thereby the ore grinding amount in the bowl mill is met the requirements of in the scope; When power reduces; Ore grinding quantitative change in the bowl mill is little, and should increase the setting value of bowl mill mine-supplying quantity this moment, thereby the ore grinding amount in the bowl mill is met the requirements of in the scope; Under the fuzzy control state; According to the condition of production, whenever change a setup parameter at a distance from one period regular time, interval time should be decided to be adjustment in per 25～35 minutes once according to on-the-spot practical condition.
7.A kind of equipment that is used for the described ore dressing plant of claim 1 ore grinding intelligence hierarchical control method; It is characterized in that comprising host computer; Through the EPA joining slave computer of host computer therewith; Through controlling the net joining measuring instrument of slave computer, topworks therewith, form the control system that integrates detection, control, monitoring management function
Described slave computer is the PLC system, comprises power module, the joining CPU of power module therewith, and joining, the one group of I/O template being set up in parallel of power module, CPU therewith respectively,
Described measuring instrument comprises to the ore deposit flow instrumentation, adds discharge measuring instrument, bowl mill bearing temperature measuring instrument, pump pit level measuring instrument, cyclone entrance concentration measuring instrument for mineral water flow instrumentation, ore discharge discharge measuring instrument, pump pond
Described topworks comprises device start/shut-down mechanism, frequency control mechanism, valve regulated mechanism.
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| CN102221824B (en) * | 2011-03-16 | 2012-08-22 | 鞍钢集团矿业公司 | Bowl mill ore-feeding amount intelligent control apparatus |
| CN103574124B (en) * | 2012-07-31 | 2015-12-09 | 金东纸业（江苏）股份有限公司 | control valve drainage system and method |
| CN103706470B (en) * | 2013-12-24 | 2016-03-02 | 中冶长天国际工程有限责任公司 | The method and apparatus that in a kind of grind grading process, ore slurry pump pit level controls |
| CN103706468B (en) * | 2013-12-24 | 2016-10-05 | 中冶长天国际工程有限责任公司 | The method and apparatus that during a kind of grind grading, ore slurry pump pit level controls |
| CN103706469B (en) * | 2013-12-24 | 2016-03-02 | 中冶长天国际工程有限责任公司 | The method and apparatus that in a kind of grind grading process, ore slurry pump pit level controls |
| CN104731005B (en) * | 2015-01-09 | 2017-07-11 | 山西太钢不锈钢股份有限公司 | A kind of semi-autogenous mill Poewr control method |
| CN104978484B (en) * | 2015-06-11 | 2017-02-08 | 西安电子科技大学 | Fuzzy forecasting model based method for detecting pulp concentration in ore grinding process of dressing plant |
| CN105170300B (en) * | 2015-10-21 | 2018-01-02 | 中冶北方（大连）工程技术有限公司 | A kind of semi-autogenous mill closed circuit grinding control system and method |
| CN105867117B (en) * | 2016-06-20 | 2017-04-26 | 西安电子科技大学 | Energy-saving optimizing method for ore grinding grading system of concentration plant based on decision rule |
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| CN107225039A (en) * | 2017-06-26 | 2017-10-03 | 南京鼎尔特科技有限公司 | The intelligent regulating system of ore reduction load |
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| CN113536614B (en) * | 2021-09-17 | 2022-01-28 | 矿冶科技集团有限公司 | Simulation system of ore grinding classification flow |
| CN114488775B (en) * | 2021-12-23 | 2024-02-06 | 东北大学 | Control method and device for pulping process of suspension roasting product |
| CN114861421B (en) * | 2022-04-22 | 2024-04-26 | 兮然科技(江苏)有限公司 | Intelligent optimization control system and method for air flow mill classifying wheel |
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| CN100401213C (en) * | 2005-10-19 | 2008-07-09 | 东北大学 | Intelligent optimized control method for comprehensive production index in ore dressing process |
| CN101183260A (en) * | 2007-12-18 | 2008-05-21 | 丹东东方测控技术有限公司 | Mineral concentration full flow process automatic control method |
| DE102008018488B4 (en) * | 2008-04-11 | 2019-01-10 | Khd Humboldt Wedag Gmbh | Circulation meter with external risers |
| CN101349912B (en) * | 2008-09-05 | 2010-07-21 | 中冶北方工程技术有限公司 | Automatic control system of sintered plant mixture making according to chemical composition |
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