CN107626433A - Method by controlling large-scale overflowball mill power to determine to add steel ball amount - Google Patents
Method by controlling large-scale overflowball mill power to determine to add steel ball amount Download PDFInfo
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- CN107626433A CN107626433A CN201710749478.8A CN201710749478A CN107626433A CN 107626433 A CN107626433 A CN 107626433A CN 201710749478 A CN201710749478 A CN 201710749478A CN 107626433 A CN107626433 A CN 107626433A
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Abstract
The invention discloses the method for adding steel ball amount by controlling large-scale overflowball mill power to determine, the grinding machine operation power under the conditions of optimal pack completeness, the reference point as normal production run power are obtained with targetedly experimental study；To monitor the change that ball mill pack completeness is inferred in the change of ball mill operation power in real time, the accurate tracking to ball adding amount is realized, it is ensured that the stable operation of grinding machine under optimum operation power condition；To run the specific changing value of power as the calculation basis of ball adding amount, it is ensured that good operation of the grinding machine under the conditions of optimal pack completeness, realize ball mill ball adding means reasonability, science with first carrying out.
Description
Technical field
The present invention relates to automatic control technology field, more particularly to by controlling large-scale overflowball mill power to determine to mend
Add the method for steel ball amount.
Background technology
Ore mill is widely used in metallurgy, chemical industry, cement, ceramics, building, thermoelectricity and state as traditional milling equipment
The departments such as anti-industry.Ore dressing department especially in metallurgical industry, grinding operation are even more to have highly important status.Ball mill
It is divided into grate ball mill and overflowball mill according to ore discharge mode difference, is that current ore dressing plant uses most common ore grinding
Machine.Overflowball mill is mainly made up of the part such as cylinder, end cap, base bearing, hollow axle journal, travelling gear and ore feeder.Should
Grinding machine ore discharge is leaned on because the hollow diameter of axle of exhaust end is slightly larger than the hollow diameter of axle of material feeding end, causes ore pulp in ore mill to have towards exhaust end
Certain gradient.When mineral slurry level highly bus minimum higher than discharge gate internal diameter, just grinding machine is discharged in overflow to ore pulp.This is unforced
High charge level ore discharge, discharge velocity is slow, thus mineral aggregate in machine the holdup time grow, the useful effect of medium is relatively low, therefore overflow
Type ball mill is overground serious, and lattice type of the treating capacity also than same specification is low.
The annual beneficiating and grinding ore processing ore in all kinds of mines in China reaches billions of tons.In grinding process, milling medium with
Grinding, impact to ore etc. act on, and while ore is ground, milling medium is also constantly consuming, to keep ore grinding to make
The normal operation of industry is, it is necessary to supplement the milling medium of consumption, to ensure that grinding machine pack completeness and media size original level are matched somebody with somebody.
The medium additional amount of current many ball mills often by manually periodically or non-periodically carry out quantitative addition, this unordered behaviour
Timely, accurate supplement can not be obtained by being easily caused as method after milling medium wears, so as to influence grinding efficiency and ore grinding energy consumption,
As after quantitatively adding medium for a period of time, media quantity is on the low side, and unfavorable shadow is produced to treating capacity and the granularity of ore milling product
Ring, if medium amount is on the high side, easily rise tripe, milling spindle mechanical failure the problems such as, influence the normal production of grinding operation.China
Application for a patent for invention CN201210088934.6 discloses abrasive body useful load dynamical system in a kind of ball tube mill and should
With method, according to optimization aim dynamic optimization abrasive body useful load, and no-load current or work(under optimum charge of balls are obtained
Rate, and keen current or power.In subsequent running, program capture keen current or power, and no-load current
Or power, according to the missing amount of Error estimation abrasive body, the steel ball addition of needs is exported, and add according to steel ball by marble feeding device
Dosage is added to steel ball amount, realizes the dynamic auto addition of abrasive body.But by ore grinding feed preparation unit size, ore discharge granularity, ore grinding
The influence of the factors such as concentration, grinding machine pack completeness, mill speed rate, its knee value whether be record value under optimal grinding condition very
Hardly possible judges.
The content of the invention
The technical problem to be solved in the present invention is that existing ball mill is added the method for steel ball amount and easily disturbed by other factorses
Cause to judge by accident, a kind of method by controlling large-scale overflowball mill power to determine to add steel ball amount is provided for this.
The technical scheme is that：The method for adding steel ball amount by controlling large-scale overflowball mill power to determine,
It comprises the following steps：（1）, determine the optimal pack completeness of large-scale overflowball mill；（2）, in ball mill normal work, note
Ball mill optimum operation power W1 under record under optimal pack completeness；（3）, in ball mill rated power during normal work, toward ball
The steel ball δ 1 of certain mass is added in grinding machine, records now ball mill operation power W2；（4）, average mend calculated according to formula
Add the changing value of steel ball mill operation power per ton, wherein Wa runs power increment value to add unit steel ball mill, single
Position is kW/t, to ensure Wa accuracy, can carry out multiplicating measure, calculate, try to achieve average value；（5）, monitor ball milling in real time
Machine run power Wr, calculate W1 and Wr difference and ratio n, i.e.,；（6）, at that time, considered according to produce reality situation to ball milling
Steel ball is added in machine, at that time, then steel ball must be added into ball mill, it is δ a, wherein δ a=n to add steel ball amount, unit t, V
For large-size ball mill dischargeable capacity, unit m3,4.8 be the heap density of steel ball, and unit is t/ m3；（7）, monitor ball after ball adding
Grinding machine runs the change of power, repeat step（5）If completing a ball adding job, if, repeat step（6）.
Step described in such scheme（1）Including reducing ball lotus, the observation of flex point observation period using pack completeness experimental period is subtracted
Ore milling product fineness changes, and the readjustment increase pack completeness phase recovers desired mog, is passed through with the descending method for subtracting pack completeness existing
Pilot production is explored to look for optimal pack completeness in field；Using the mog of grinding machine as control targe, with fineness and sorting index most
The optimal pack completeness of synthetic determination afterwards.
W2, Wa and Wr described in such scheme are in ball mill nominal operation power.
It is weighted average three times above described in such scheme.
The beneficial effects of the invention are as follows power is run by real-time monitoring ball grinder, changed by ball mill power and determine to mend
Add steel ball number, be a kind of simple, effective, method of fast decision steel ball additional amount, solve universal during adding ball
The problem of existing steel ball number is added plus be few, realize steadily and accurately supplement the steel ball amount being lost in grinding process.
Brief description of the drawings
Fig. 1 is the flow chart of the present invention.
Embodiment
As shown in figure 1, the present invention comprises the following steps：（1）, determine the optimal pack completeness of large-scale overflowball mill；
（2）, in ball mill normal work, record the ball mill optimum operation power W1 under optimal pack completeness；（3）, in ball mill
In rated power during normal work, the steel ball δ 1 of certain mass is added into ball mill, records now ball mill operation power
W2；（4）, calculate the changing value averagely added steel ball mill per ton and run power according to formula, wherein Wa is adds unit steel
Ball ball mill runs power increment value, unit kW/t, to ensure Wa accuracy, can carry out multiplicating measure, calculate, ask
Obtain average value；（5）, in real time monitoring ball mill operation power Wr, calculate W1 and Wr difference and ratio n, i.e.,；（6）, at that time,
Considered to add steel ball into ball mill according to produce reality situation, at that time, then steel ball must be added into ball mill, adds steel ball
It is large-size ball mill dischargeable capacity to measure as δ a, wherein δ a=n, unit t, V, and unit m3,4.8 be the heap density of steel ball, single
Position is t/ m3；（7）, the change of ball mill operation power, repeat step are monitored after ball adding（5）If complete a ball adding work
Make, if, repeat step（6）.
With reference to embodiment, the present invention will be further described.
Embodiment 1：The method for adding steel ball amount by controlling large-scale overflowball mill power to determine, it is characterized in that it is wrapped
Include following steps：（1）, determine the optimal pack completeness of large-scale overflowball mill；（2）, in ball mill normal work, record
Ball mill optimum operation power W1 under optimal pack completeness；（3）, in ball mill rated power during normal work, toward ball mill
The middle steel ball δ 1 for adding certain mass, record now ball mill operation power W2；（4）, calculated according to formula averagely add it is every
The changing value of ton steel ball mill operation power, wherein Wa run power increment value to add unit steel ball mill, and unit is
KW/t, to ensure Wa accuracy, replication, calculating three times are carried out, tries to achieve average value；（5）, in real time monitoring ball mill operation
Power Wr, calculate W1 and Wr difference and ratio n, i.e.,；（6）, at that time, consider to mend into ball mill according to produce reality situation
Add steel ball, at that time, then steel ball must be added into ball mill, it is δ a, wherein δ a=n to add steel ball amount, and unit t, V are large-scale
Ball mill dischargeable capacity, unit m3,4.8 be the heap density of steel ball, unit t/m3；（7）, ball mill operation is monitored after ball adding
The change of power, repeat step（5）If completing a ball adding job, if, repeat step（6）.
Embodiment 2：Difference with embodiment 1 is step（4）In be to ensure Wa accuracy, carry out 4 replications,
Calculate, try to achieve average value.
The step of the present invention（1）Concrete operations may be referred to Chinese invention patent application number CN201310677487.2 patents
A kind of determination method of entitled grinding machine pack completeness, its determination process reduce ball lotus using pack completeness experimental period is subtracted, and flex point is seen
Phase observation ore milling product fineness change is examined, the readjustment increase pack completeness phase recovers desired mog, with the descending for subtracting pack completeness
Method explores pilot production to look for optimal pack completeness by scene；Using the mog of grinding machine as control targe, with fineness and choosing
The optimal pack completeness of the other last synthetic determination of index.
The final purpose of addition steel ball in the present invention is to ensure that steel ball pack completeness is certain, up and down no more than 2 percentages
Point, adds how much number mainly influences whether grinding machine maintains optimal pack completeness condition, and number is more much more accurate, with Dongguashan copper
The large-scale overflowball mills of 5.03 × 8.3m of ore deposit（Motor rated power 3300kW）Exemplified by production, ball mill is in pack completeness 32%
Under conditions of, normal operation power is 3100 kW, and the changing value for averagely adding steel ball mill operation power per ton is 10kW,
When monitoring ball mill operation power Wr is 3050 kW in real time, 5t steel balls are added into ball mill, to ensure that ball mill steel ball fills
The rate of filling out maintains optimum level, and when monitoring ball mill operation power Wr is 3080 kW in real time, 2t steel is added into ball mill
Ball.
Chinese invention patent application number CN201210088934.6 discloses abrasive body useful load in a kind of ball tube mill
Dynamical system and application process, optimal electric current or performance number are the knee value determined under Automated condtrol, but by ore grinding to ore deposit
Whether the influence of the factors such as granularity, ore discharge granularity, ore milling concentration, grinding machine pack completeness, mill speed rate, its knee value are most preferably to grind
Record value under the conditions of ore deposit is difficult to judge, the present invention is by targetedly experimental study（Grinding machine pack completeness i.e. described above
Determination method）The optimal pack completeness of large-scale overflowball mill determined, and the performance number determined on this condition, as normal
The reference point of production run power；It is real to monitor the change that ball mill pack completeness is inferred in the change of ball mill operation power in real time
The accurate tracking to ball adding amount is showed, it is ensured that the stable operation of grinding machine under optimum operation power condition；To run power
Specific calculation basis of the changing value as ball adding amount, it is ensured that grinding machine is in the good operation under the conditions of optimal pack completeness, realization
The reasonability of ball mill ball adding means, science are with first carrying out.
The technical method of the present invention is applied successfully in Tongling Nonferrous Metal Group Co., Ltd's Dongguashan Copper Mine, such as
Two Φ 5.03x8.3m overflowball mills of Dongguashan Copper Mine（Motor rated power 3300kW）, in the condition of pack completeness 32%
Under, normal operation power is 3100 kW, by controlling ball mill to run power to determine each ball adding amount, the technology application
Since, equipment is well run always, and the running efficiency of equipment is greatly improved.Pass through the ball feeding method table of the application present invention
Bright, the technical method reliability and accuracy with height in the large-scale overflowball mill ball adding in mine particularly can be with
Automatically controlling for this method is further promoted using Automation Technology for Beneficiation.
The present invention is not limited in above-mentioned embodiment, in those of ordinary skill in the art's possessed knowledge
It is interior, it can also be made a variety of changes on the premise of present inventive concept is not departed from.
Claims (4)
1. the method for adding steel ball amount by controlling large-scale overflowball mill power to determine, it is characterized in that it includes following step
Suddenly：（1）, determine the optimal pack completeness of large-scale overflowball mill；（2）, in ball mill normal work, record optimal filling
Ball mill optimum operation power W under rate1；（3）, in ball mill rated power during normal work, one is added into ball mill
Determine the steel ball δ of quality1, record now ball mill operation power W2；（4）, according to formulaCalculate flat
Add the changing value of steel ball mill operation power per ton, wherein WaPower increase is run to add unit steel ball mill
Value, unit kW/t, to ensure WaAccuracy, can carry out multiplicating measure, calculate, try to achieve average value；（5）, in real time
Ball mill operation power Wr is monitored, calculates W1With Wr difference withRatio n, i.e.,；（6）, whenWhen, consider to add steel ball into ball mill according to produce reality situation, whenWhen, then it is necessary
Steel ball is added into ball mill, it is δ a, wherein δ a=n to add steel ball amount, and unit t, V are large-size ball mill dischargeable capacity, single
Position is m3, 4.8 be the heap density of steel ball, and unit is t/ m3；（7）, the change of ball mill operation power is monitored after ball adding, repeat to walk
Suddenly（5）If, then a ball adding job is completed, if, then repeat step（6）.
2. the method for adding steel ball amount by controlling large-scale overflowball mill power to determine as claimed in claim 1, it is special
Sign is the step（1）Including reducing ball lotus using pack completeness experimental period is subtracted, flex point observation period observation ore milling product fineness becomes
Change, the readjustment increase pack completeness phase recovers desired mog, and pilot production is explored by scene with the descending method for subtracting pack completeness
To look for optimal pack completeness；It is optimal with fineness and the last synthetic determination of sorting index using the mog of grinding machine as control targe
Pack completeness.
3. the method for adding steel ball amount by controlling large-scale overflowball mill power to determine as claimed in claim 2, it is special
Sign is the W2、Wa、With Wr in ball mill nominal operation power.
4. the method for adding steel ball amount by controlling large-scale overflowball mill power to determine as claimed in claim 3, it is special
Sign is describedIt is weighted average three times above.
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| Application Number | Priority Date | Filing Date | Title |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710749478.8A CN107626433B (en) | 2017-08-28 | 2017-08-28 | Method for determining steel ball adding amount by controlling power of large-scale overflow ball mill |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109145383A (en) * | 2018-07-24 | 2019-01-04 | 铜陵有色金属集团股份有限公司 | A method of semi-autogenous mill pack completeness is calculated based on liner plate quantity |
| CN115055272A (en) * | 2022-04-29 | 2022-09-16 | 云南驰宏锌锗股份有限公司 | Method for determining optimal filling rate of medium-sized ball mill |
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| CN104056697A (en) * | 2014-07-17 | 2014-09-24 | 山东工大中能科技有限公司 | Ball charging method of ball mill |
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| CN109145383A (en) * | 2018-07-24 | 2019-01-04 | 铜陵有色金属集团股份有限公司 | A method of semi-autogenous mill pack completeness is calculated based on liner plate quantity |
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