CN106644639B - The closed circuit fine grinding system of the selection method and type Selection Test of industrial vertical stirring mill - Google Patents
The closed circuit fine grinding system of the selection method and type Selection Test of industrial vertical stirring mill Download PDFInfo
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- CN106644639B CN106644639B CN201611198689.9A CN201611198689A CN106644639B CN 106644639 B CN106644639 B CN 106644639B CN 201611198689 A CN201611198689 A CN 201611198689A CN 106644639 B CN106644639 B CN 106644639B
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- Prior art keywords
- vertical stirring
- stirring mill
- grinding
- ore
- closed circuit
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- 238000000227 grinding Methods 0.000 title claims abstract description 142
- 238000003756 stirring Methods 0.000 title claims abstract description 129
- 238000010187 selection method Methods 0.000 title claims abstract description 23
- 238000005070 sampling Methods 0.000 claims abstract description 66
- 238000005265 energy consumption Methods 0.000 claims abstract description 43
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 42
- 239000011707 mineral Substances 0.000 claims abstract description 42
- 239000002245 particle Substances 0.000 claims abstract description 40
- 230000000051 modifying Effects 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims description 21
- 238000002156 mixing Methods 0.000 claims description 15
- 238000011065 in-situ storage Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0nMS4wJyBlbmNvZGluZz0naXNvLTg4NTktMSc/Pgo8c3ZnIHZlcnNpb249JzEuMScgYmFzZVByb2ZpbGU9J2Z1bGwnCiAgICAgICAgICAgICAgeG1sbnM9J2h0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnJwogICAgICAgICAgICAgICAgICAgICAgeG1sbnM6cmRraXQ9J2h0dHA6Ly93d3cucmRraXQub3JnL3htbCcKICAgICAgICAgICAgICAgICAgICAgIHhtbG5zOnhsaW5rPSdodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hsaW5rJwogICAgICAgICAgICAgICAgICB4bWw6c3BhY2U9J3ByZXNlcnZlJwp3aWR0aD0nMzAwcHgnIGhlaWdodD0nMzAwcHgnIHZpZXdCb3g9JzAgMCAzMDAgMzAwJz4KPCEtLSBFTkQgT0YgSEVBREVSIC0tPgo8cmVjdCBzdHlsZT0nb3BhY2l0eToxLjA7ZmlsbDojRkZGRkZGO3N0cm9rZTpub25lJyB3aWR0aD0nMzAwLjAnIGhlaWdodD0nMzAwLjAnIHg9JzAuMCcgeT0nMC4wJz4gPC9yZWN0Pgo8dGV4dCB4PScxMzguMCcgeT0nMTcwLjAnIGNsYXNzPSdhdG9tLTAnIHN0eWxlPSdmb250LXNpemU6NDBweDtmb250LXN0eWxlOm5vcm1hbDtmb250LXdlaWdodDpub3JtYWw7ZmlsbC1vcGFjaXR5OjE7c3Ryb2tlOm5vbmU7Zm9udC1mYW1pbHk6c2Fucy1zZXJpZjt0ZXh0LWFuY2hvcjpzdGFydDtmaWxsOiMzQjQxNDMnID5GPC90ZXh0Pgo8dGV4dCB4PScxNjUuNicgeT0nMTcwLjAnIGNsYXNzPSdhdG9tLTAnIHN0eWxlPSdmb250LXNpemU6NDBweDtmb250LXN0eWxlOm5vcm1hbDtmb250LXdlaWdodDpub3JtYWw7ZmlsbC1vcGFjaXR5OjE7c3Ryb2tlOm5vbmU7Zm9udC1mYW1pbHk6c2Fucy1zZXJpZjt0ZXh0LWFuY2hvcjpzdGFydDtmaWxsOiMzQjQxNDMnID5lPC90ZXh0Pgo8L3N2Zz4K data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0nMS4wJyBlbmNvZGluZz0naXNvLTg4NTktMSc/Pgo8c3ZnIHZlcnNpb249JzEuMScgYmFzZVByb2ZpbGU9J2Z1bGwnCiAgICAgICAgICAgICAgeG1sbnM9J2h0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnJwogICAgICAgICAgICAgICAgICAgICAgeG1sbnM6cmRraXQ9J2h0dHA6Ly93d3cucmRraXQub3JnL3htbCcKICAgICAgICAgICAgICAgICAgICAgIHhtbG5zOnhsaW5rPSdodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hsaW5rJwogICAgICAgICAgICAgICAgICB4bWw6c3BhY2U9J3ByZXNlcnZlJwp3aWR0aD0nODVweCcgaGVpZ2h0PSc4NXB4JyB2aWV3Qm94PScwIDAgODUgODUnPgo8IS0tIEVORCBPRiBIRUFERVIgLS0+CjxyZWN0IHN0eWxlPSdvcGFjaXR5OjEuMDtmaWxsOiNGRkZGRkY7c3Ryb2tlOm5vbmUnIHdpZHRoPSc4NS4wJyBoZWlnaHQ9Jzg1LjAnIHg9JzAuMCcgeT0nMC4wJz4gPC9yZWN0Pgo8dGV4dCB4PSczNS4wJyB5PSc1My42JyBjbGFzcz0nYXRvbS0wJyBzdHlsZT0nZm9udC1zaXplOjIzcHg7Zm9udC1zdHlsZTpub3JtYWw7Zm9udC13ZWlnaHQ6bm9ybWFsO2ZpbGwtb3BhY2l0eToxO3N0cm9rZTpub25lO2ZvbnQtZmFtaWx5OnNhbnMtc2VyaWY7dGV4dC1hbmNob3I6c3RhcnQ7ZmlsbDojM0I0MTQzJyA+RjwvdGV4dD4KPHRleHQgeD0nNTEuMCcgeT0nNTMuNicgY2xhc3M9J2F0b20tMCcgc3R5bGU9J2ZvbnQtc2l6ZToyM3B4O2ZvbnQtc3R5bGU6bm9ybWFsO2ZvbnQtd2VpZ2h0Om5vcm1hbDtmaWxsLW9wYWNpdHk6MTtzdHJva2U6bm9uZTtmb250LWZhbWlseTpzYW5zLXNlcmlmO3RleHQtYW5jaG9yOnN0YXJ0O2ZpbGw6IzNCNDE0MycgPmU8L3RleHQ+Cjwvc3ZnPgo= [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 8
- 239000002002 slurry Substances 0.000 abstract description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound 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[Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052802 copper Inorganic materials 0.000 abstract description 4
- 239000010949 copper Substances 0.000 abstract description 4
- 229910052742 iron Inorganic materials 0.000 abstract description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N molybdenum Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 abstract description 4
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound 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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2866—Grinding or homogeneising
Abstract
The invention discloses a kind of selection method of industrial vertical stirring mill and the closed circuit fine grinding system of type Selection Test, selection method includes the steps that preparing the closed circuit fine grinding system of type Selection Test, modulation ore pulp and tests into slurry, ore grinding and repeatedly sampled, calculated and drawn energy consumption curve according to the content of targeted particle size mineral in sample and fine grinding consumption power, calculate to power needed for type selecting industry vertical stirring mill；The closed circuit fine grinding system of type Selection Test includes the prototype version vertical stirring mill and circulator that connection forms closed cycle grinding system, and the closed circuit fine grinding system of type Selection Test is equipped with the power measurement device for measuring the stirring shaft power of prototype version vertical stirring mill.The present invention is suitable for the type selecting of the industrial vertical stirring mills of metalliferous minerals such as iron ore, molybdenum ore, copper mine, Pb-Zn deposits, gold mine, has many advantages, such as that simple to operate, error is small.
Description
Technical field
The present invention relates to technical field of mineral processing, and in particular to a kind of selection method of industrial vertical stirring mill and
The closed circuit fine grinding system of type Selection Test.
Background technique
As the mineral resources for development and utilization tend to poor, thin, miscellaneous, microfine refractory minerals is increasingly becoming mine to be processed
Resource body is produced, grinding efficiency is high, low energy consumption, the vertical stirring mill that takes up little area just gradually replaces ball mill to become fine- disseminated ore
The main equipment of object fine grinding.How power demand and industrial grinding machine model specification determined by experimental method, is industrial vertical
Formula Ball-stirring mill reduces cost of investment, realizes energy-saving key.Traditional selection method (such as Bond's method) is no longer desirable for really
Determine the determination of Ultrafine Grinding power demand and Ball-stirring mill model.Although Bond's method using various ways (such as correction factor EF5) come
This method is set to be suitable for fine particle product, but still not in the case where the ball mill of conventional media size is used to produce fine granule product
Properly, the power demand calculated with Bond's formula is too conservative.
Currently, the power demand test of agitator mill is usually that device fabrication producer or third party laboratory pass through experiment
Type mill test determines.When being stirred mill laboratory type Selection Test, batch ore grinding is generallyd use, by sample ore by some granularity
It is finely ground to targeted particle size, then according to the power for being finely ground to targeted particle size required time and power meter measurement, calculates levigate mineral
Required power demand, then by treating capacity needed for the power demand and industrial grinding machine, function needed for calculating industrial mill
Rate.This method has the following problems:
1) it due to having a fixed gap with cylinder body bottom using the blender of batch ore grinding, vertical stirring mill, thus can produce
Life and death angle；In addition, the ore grinding intensity due to each section of vertical mixing mill is different, thus the grinding efficiency in each portion is also different, this meeting
Cause ore milling product size distribution and industry spot not identical, type selecting process data is higher, and selected industrial grinding machine model is bigger than normal.
2) Mill power rate measures input end of motor power P by using power meter0(i.e. general power) is estimated, rather than wait grind
The available power P that mineral directly consumeEffectively, since the motor of laboratory mill, speed reducer drive system effectiveness are low, P0It is much larger than
P2, thus biggish error is generated to type selecting result.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the shortcomings of the prior art, provide it is a kind of it is simple to operate,
The selection method of the small industrial vertical stirring mill of error correspondingly provides a kind of type Selection Test for the selection method and closes
Road fine grinding system.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of selection method of industrial vertical stirring mill, comprising the following steps:
(A) prepare the closed circuit fine grinding system of type Selection Test, the closed circuit fine grinding system of type Selection Test forms closed circuit including connection
Recycle the prototype version vertical stirring mill and circulator of grinding system；
(B) it will be modulated into the ore pulp that concentration is 45%~70% to ore grinding powder, the ore pulp is added to prototype version is vertical stirs
It mixes in grinding machine, additional amount is the 110%~150% of prototype version vertical mixing mill machine drum body volume；
(C) the starting closed circuit fine grinding system of type Selection Test starts ore grinding test, vertical from prototype version at interval of 3min~5min
The overflow port sampling of agitator mill (3) is primary, until sampling number terminates ore grinding test after being greater than 6 times；Measure every sub-sampling institute
In sample the content of targeted particle size mineral and when every sub-sampling the agitating shaft of prototype version vertical stirring mill shaft power；
Preferably, 30 or more duration of test runs sample primary at interval of 3min~5min；
(D) according to prototype version vertical mixing when the content of targeted particle size mineral in sample obtained by every sub-sampling and every sub-sampling
The shaft power of the agitating shaft of grinding machine, using formula (1) calculate from start ore grinding to every sub-sampling constantly specific energy consumption in section:
In formula, EsFor from ore grinding is started to the specific energy consumption in period when sampling, unit kWh/t；P2When indicating sampling
The shaft power of the agitating shaft of prototype version vertical stirring mill, unit kW；T indicate from start ore grinding to it is used when sampling when
Between, unit h；Q indicates mineral powder amount used in the closed circuit fine grinding system of type Selection Test, unit t；And it is drawn according to acquired results are calculated
Energy consumption curve processed determines that the content of targeted particle size mineral reaches unit when industry spot requires according to energy consumption curve
Energy consumption Eis；
(E) it according to the in-situ processing amount to type selecting industry vertical stirring mill, is calculated using formula (2) vertical to type selecting industry
Power needed for formula agitator mill:
P=KQEis (2)
In formula, P is indicated to power needed for type selecting industry vertical stirring mill, unit kW；K indicates industrial mill operation ginseng
Number value coefficient, value range are 1.1~1.6；Q indicates that the in-situ processing amount to type selecting industry vertical stirring mill, unit are
t/h；EisIndicate that the content of targeted particle size mineral reaches specific energy consumption when industry spot requires, unit kWh/t.
Above-mentioned selection method, it is preferred that in the step (B), be added in prototype version vertical stirring mill by ore pulp
During, start prototype version vertical stirring mill and prototype version vertical stirring mill is kept slowly to run.
Above-mentioned selection method, it is preferred that in the step (C), every sub-sampling is in prototype version vertical stirring mill overflow
The same position of mouth is sampled, and sampling amount is 150ml~300ml.
A kind of closed circuit fine grinding system of type Selection Test forms the prototype version vertical mixing of closed cycle grinding system including connecting
Grinding machine and circulator, the circulator include ore pulp circulating slot and ore pulp circulating pump, the prototype version vertical stirring mill
Overflow port be connected with the feed inlet of ore pulp circulating slot, the discharge port and the import phase of ore pulp circulating pump of the ore pulp circulating slot
Even, the outlet of the ore pulp circulating pump is connected with the feed inlet of prototype version vertical stirring mill, the closed circuit fine grinding of type Selection Test
System is additionally provided with the power measurement device of the stirring shaft power for measuring the prototype version vertical stirring mill.
The closed circuit fine grinding system of above-mentioned type Selection Test, it is preferred that the power measurement device includes power measuring and peace
Loaded on the torque rating sensor on agitating shaft, the torque rating sensor is connected by signal wire with power measuring.
The closed circuit fine grinding system of above-mentioned type Selection Test, it is preferred that the outlet of the ore pulp circulating pump with prototype version is vertical stirs
The pipeline mixed between the feed inlet of grinding machine is equipped with ore pulp circulating slot valve.
The closed circuit fine grinding system of above-mentioned type Selection Test, it is preferred that the closed circuit fine grinding system of type Selection Test further includes sizing mixing
The discharge port of slot and surge tank valve, the surge tank is connected with the import of surge tank valve, the outlet of the surge tank valve
It is connected with the import of ore pulp circulating pump.
The closed circuit fine grinding system of above-mentioned type Selection Test, it is preferred that the ore pulp circulating pump is variable-frequency control pump.
The closed circuit fine grinding system of above-mentioned type Selection Test, it is preferred that the cylinder volume of the prototype version vertical stirring mill is
9L~50L.
Compared with the prior art, the advantages of the present invention are as follows: the selection method of the industrial vertical stirring mill of the present invention is adopted
With closed cycle Continuous Grinding mode, both analog industrial mill site of deployment grinding mode, was obtained and live ore milling product phase
Like the product of size distribution, the drawbacks of eliminating batch ore grinding, (such as ore milling product granularity was uneven, size distribution and industry spot phase
Poor larger, grinding machine inner dead space etc.), sample size needed in turn avoiding traditional selection method is big, cyclone classification grain and yield not
The adverse effects such as energy matches, cyclone classification is unstable.Meanwhile the selection method is using directly measurement prototype version vertical mixing mill
The shaft power of the agitating shaft of machine carries out Lectotype and calculation, eliminates the influence of the extraneous factors such as transmission system efficiency, it can be ensured that test
Power measurement needed for process Minerals fine grinding it is accurate reliable, and then guarantee the accurate and reliable of type selecting result.The selection method is logical
The laboratory test for crossing simple specification accurately determines industrial vertical stirring mill specifications and models, has simple to operate, mistake
The small feature of difference.The closed circuit fine grinding system structure of type Selection Test of the invention is simple and compact, and work continuity is good.
The selection method and the closed circuit fine grinding system of type Selection Test of the industrial vertical stirring mill of the present invention are suitable for iron ore, molybdenum
The type selecting of the industrial vertical stirring mill of the metalliferous minerals such as mine, copper mine, Pb-Zn deposits, gold mine, can fine grinding mineral to targeted particle size
Range be -325 mesh~-600 mesh, the content ranges of targeted particle size mineral is 75%~95%.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the closed circuit fine grinding system of type Selection Test of embodiment 1.
Fig. 2 is the energy consumption curve figure in embodiment 2.
Fig. 3 is industrial products size distribution and Lab Products size distribution comparison diagram in embodiment 2.
Fig. 4 is the energy consumption curve figure in embodiment 3.
Fig. 5 is industrial products size distribution and Lab Products size distribution comparison diagram in embodiment 3.
Fig. 6 is the energy consumption curve figure in embodiment 4.
Fig. 7 is industrial products size distribution and Lab Products size distribution comparison diagram in embodiment 4.
Marginal data:
1, surge tank；2, surge tank valve；3, prototype version vertical stirring mill；4, ore pulp circulating slot；5, ore pulp circulating slot
Valve；6, ore pulp circulating pump；7, motor；8, speed reducer；9, torque rating sensor.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Embodiment 1:
As shown in Figure 1, the closed circuit fine grinding system of the type Selection Test of the present embodiment includes that connection forms closed cycle grinding system
Prototype version vertical stirring mill 3 and circulator, circulator include ore pulp circulating slot 4 and ore pulp circulating pump 6, prototype version is vertical
The overflow port on 3 cylinder top of formula agitator mill is connected with the feed inlet of ore pulp circulating slot 4, the discharge port and mine of ore pulp circulating slot 4
The import for starching circulating pump 6 is connected, the feed inlet phase of the outlet and 3 cylinder lower part of prototype version vertical stirring mill of ore pulp circulating pump 6
Even, the power that the closed circuit fine grinding system of type Selection Test is additionally provided with the stirring shaft power for measuring prototype version vertical stirring mill 3 is surveyed
Determine device.
In the present embodiment, on the pipeline between the outlet of ore pulp circulating pump 6 and the feed inlet of prototype version vertical stirring mill 3
Equipped with ore pulp circulating slot valve 5.
In the present embodiment, the closed circuit fine grinding system of type Selection Test further includes surge tank 1 and surge tank valve 2, and surge tank 1 goes out
Material mouth is connected with the import of surge tank valve 2, and the outlet of surge tank valve 2 is connected with the import of ore pulp circulating pump 6, surge tank 1
Using the prior art, including groove body and blender, discharge port is located at the bottom of groove body, and feed inlet is located at the top of groove body.It is adjusting
When stock tank 1 modulates ore pulp, surge tank valve 2 is closed；It is stood needing the ore pulp modulated in surge tank 1 being added to prototype version
When in formula agitator mill 3, ore pulp circulating slot valve 5 is closed, opens surge tank valve 2, starting ore pulp circulating pump 6 can be by ore pulp
It is added in prototype version vertical stirring mill 3, after ore pulp is added, then opens ore pulp circulating slot valve 5, close surge tank valve
2.After surge tank 1 and surge tank valve 2 are set, greatly facilitate modulation ore pulp and that ore pulp is added to prototype version is vertical
Agitator mill 3, and pass through control ore pulp circulating slot valve 5 and surge tank valve 2, so that it may it realizes and ore pulp and ore grinding is added mutually not
Interference, the entire closed circuit fine grinding system of type Selection Test it is simple and compact for structure, work continuity it is good.
In the present embodiment, power measurement device includes power measuring and the torque rating sensor that is installed on agitating shaft
9, power measuring torque rating sensor 9 is connected by signal wire with power measuring, and power measuring and torque rating pass
Sensor 9 is the prior art.Wherein, the mixer drive of prototype version vertical stirring mill 3 includes motor 7 and speed reducer 8, is subtracted
The input shaft of fast machine 8 is connected with 7 output shaft of motor, and the output shaft of speed reducer 8 is connected with agitating shaft.
In the present embodiment, ore pulp circulating pump 6 is variable-frequency control pump.The cylinder volume of prototype version vertical stirring mill 3 is 9L
~50L.Connecting pipe between surge tank 1, prototype version vertical stirring mill 3, ore pulp circulating slot 4 and ore pulp circulating pump 6 should be use up
It may be short.
Embodiment 2:
The ore grinding object to type selecting industry vertical stirring mill of the present embodiment is molybdenum ore, it is desirable that is finely ground to targeted particle size
For -325 mesh, the content of targeted particle size mineral is 75%.
Specific step is as follows for selection method:
(A) prepare the closed circuit fine grinding system of type Selection Test, the closed circuit fine grinding system of type Selection Test is that the type selecting of embodiment 1 is tried
Test closed circuit fine grinding system；
(B) it will be modulated into the ore pulp that concentration is 65% to ore grinding powder, prototype version vertical stirring mill 3 is added in the ore pulp
Interior, additional amount is the 120% of 3 cylinder volume of prototype version vertical stirring mill；
The specific steps of step (B) are as follows:
1) match ball: the medium ball for weighing and preparing in advance being added in 9L prototype version vertical stirring mill 3, medium ball is filled out
Fill 45~65% that rate is 3 cylinder volume of prototype version vertical stirring mill, the present embodiment 55%；Medium ball select diameter for
10mm:8mm:6mm:4mm is that 1:4:4:1 is configured according to weight ratio.
2) ore pulp that modulation concentration is 65%: 5kg molybdenum ore powder is weighed, surge tank valve 2 and ore pulp circulating slot valve are closed
5, it is added into surge tank 1 and weighs 50% water that miberal powder presses compound concentration institute water requirement, open the agitating device of surge tank 1,
Miberal powder is added, adds remaining 50% water, 5~10min of stirring is modulated into the ore pulp of required concentration；Miberal powder is to type selecting work
Industry vertical stirring mill use site is used to ore grinding powder, and after laboratory is dried, while measuring the grain of pulp
The data such as degree, density.
3) into slurry: open surge tank valve 2, open ore pulp circulating pump 6, make the ore pulp modulated quickly by cylinder lower part into
Enter in prototype version vertical stirring mill 3；During ore pulp is added, starts prototype version vertical stirring mill 3 and keep prototype version
3 slow running of vertical stirring mill closes surge tank valve 2 when in surge tank 1 without ore pulp, opens ore pulp circulating slot valve
5。
(C) starting prototype version vertical stirring mill 3 starts ore grinding test, stirs at interval of 3min~5min from prototype version is vertical
The overflow port sampling for mixing grinding machine 3 is primary, until sampling number terminates ore grinding test after being greater than 6 times；Measure sample obtained by every sub-sampling
The content (granularity of targeted particle size mineral be -325 mesh) of targeted particle size mineral and prototype version is vertical when every sub-sampling stirs in product
Mix the shaft power of the agitating shaft of grinding machine 3；The specific duration of test runs of this step is 33min, primary every 3min sampling, is taken every time
Sample should be 150ml~300ml in the same position of 3 overflow port of prototype version vertical stirring mill, each sampling amount.It is tested in ore grinding
In the process, the liquid level constant in the revolving speed holding ore pulp circulating slot 4 of ore pulp circulating pump 6, the ore pulp in ore pulp circulating slot 4 are adjusted
When liquid level is more than the bottom level of 4 blender of ore pulp circulating slot, the blender of Ying Kaiqi ore pulp circulating slot 4 keeps ore pulp sufficiently mixed
It closes.
(D) according to prototype version vertical mixing when the content of targeted particle size mineral in sample obtained by every sub-sampling and every sub-sampling
The shaft power of the agitating shaft of grinding machine 3, using formula (1) calculate from start ore grinding to every sub-sampling constantly unit energy in section
Consumption:
In formula, EsFor from ore grinding is started to the specific energy consumption in period when sampling, unit kWh/t；P2When indicating sampling
The shaft power of the agitating shaft of prototype version vertical stirring mill 3, unit kW；T indicate from start ore grinding to it is used when sampling when
Between (time used in fine grinding when sampling), unit h；Q indicates that pulp amount used in the closed circuit fine grinding system of type Selection Test, unit are
t；And energy consumption curve is drawn according to acquired results are calculated, determine that the content of targeted particle size mineral reaches according to energy consumption curve
Specific energy consumption E when being required to industry spotis；
(E) it according to the in-situ processing amount to type selecting industry vertical stirring mill, is calculated using formula (2) vertical to type selecting industry
Power needed for formula agitator mill:
P=KQEis (2)
In formula, P is indicated to power needed for type selecting industry vertical stirring mill, unit kW；K indicates industrial mill operation ginseng
Number value coefficient, value range are 1.1~1.6；Q indicates that the in-situ processing amount to type selecting industry vertical stirring mill, unit are
t/h；EisIndicate that the content of targeted particle size mineral reaches specific energy consumption when industry spot requires, unit kWh/t.By accurate
Available power needed for measuring ore grinding, to realize the accurate type selecting of industrial mill.
Energy consumption curve obtained by the present embodiment step (D) is as shown in Figure 2.It can be obtained, be finely ground to by the energy consumption curve
Targeted particle size is -325 mesh, and the content of targeted particle size mineral reaches specific energy consumption when industry spot requires (content 75%)
EisFor 6.8kWh/t.The present embodiment is 8.5t/h to type selecting industry vertical stirring mill site of deployment treating capacity Q, and COEFFICIENT K takes
Value is 1.3, then the power demand that scene is calculated to type selecting industry vertical stirring mill is about 75kW.
Type selecting effect: the postindustrial vertical stirring mill of type selecting 1, installed power 75kW, treating capacity are 200~220t/
D, it is 75~78% that granularity, which is -325 target minreal contents, in ore milling product, and ore grinding energy consumption is 6.6~6.8kWh/t.Work after type selecting
The industrial products size distribution of industry vertical stirring mill ore grinding and the Lab Products size distribution of test ore grinding are compared such as Fig. 3 institute
Show.
Embodiment 3:
The ore grinding object to type selecting industry vertical stirring mill of the present embodiment is iron ore, it is desirable that is finely ground to targeted particle size
For -400 mesh, the content of targeted particle size mineral is 95%.
Specific step is as follows for selection method:
(A) prepare the closed circuit fine grinding system of type Selection Test, the closed circuit fine grinding system of type Selection Test is that the type selecting of embodiment 1 is tried
Test closed circuit fine grinding system；
(B) it will be modulated into the ore pulp that concentration is 65% to ore grinding powder, prototype version vertical stirring mill 3 is added in the ore pulp
Interior, additional amount is the 130% of 3 cylinder volume of prototype version vertical stirring mill；
The specific steps of step (B) are as follows:
1) match ball: the medium ball for weighing and preparing in advance being added in 50L prototype version vertical stirring mill 3, medium ball
Filling rate is the 60% of 3 cylinder volume of prototype version vertical stirring mill；Medium ball selects diameter for 20mm:16mm:14mm:
11mm:8mm is that 1:3:3:2:1 is configured according to weight ratio.
2) it modulates the ore pulp of concentration 65%: weighing 40kg Iron Ore Powder；Surge tank valve 2 and ore pulp circulating slot valve 5 are closed,
It is added into surge tank 1 by 50% water for weighing miberal powder compound concentration institute water requirement；Open the agitating device of surge tank 1；Add
Enter miberal powder, add remaining 50% water, 5~10min of stirring is modulated into the ore pulp that concentration is 65%；Miberal powder is to type selecting work
Industry type vertical stirring mill use site is used to ore grinding powder, and after laboratory is dried, and measures the grain of pulp
The data such as degree, density.
3) into slurry: open surge tank valve 2, open ore pulp circulating pump 6, make the ore pulp modulated quickly by cylinder lower part into
Enter in prototype version vertical stirring mill 3；During ore pulp is added, starts prototype version vertical stirring mill 3 and keep prototype version
3 slow running of vertical stirring mill closes surge tank valve 2 when in surge tank 1 without ore pulp, opens ore pulp circulating slot valve
5。
(C) starting prototype version vertical stirring mill 3 starts ore grinding test, stirs at interval of 3min~5min from prototype version is vertical
The overflow port sampling for mixing grinding machine 3 is primary, until sampling number terminates ore grinding test after being greater than 6 times；Measure sample obtained by every sub-sampling
The content (granularity of targeted particle size mineral be -325 mesh) of targeted particle size mineral and prototype version is vertical when every sub-sampling stirs in product
Mix the shaft power of the agitating shaft of grinding machine 3；(under normal circumstances, duration of test runs 40min, it is primary every 4min sampling, every time
Sampling should be 150ml~300ml in the same position of 3 overflow port of prototype version vertical stirring mill, each sampling amount.It is tried in ore grinding
During testing, the liquid level constant in the revolving speed holding ore pulp circulating slot 4 of ore pulp circulating pump 6, the mine in ore pulp circulating slot 4 are adjusted
When slurries position is more than the bottom level of 4 blender of ore pulp circulating slot, the blender of Ying Kaiqi ore pulp circulating slot 4 keeps ore pulp abundant
Mixing.
(D) according to prototype version vertical mixing when the content of targeted particle size mineral in sample obtained by every sub-sampling and every sub-sampling
The shaft power of the agitating shaft of grinding machine 3, using formula (1) calculate from start ore grinding to every sub-sampling constantly unit energy in section
Consumption:
In formula, EsFor from ore grinding is started to the specific energy consumption in period when sampling, unit kWh/t；P2When indicating sampling
The shaft power of the agitating shaft of prototype version vertical stirring mill 3, unit kW；T indicate from start ore grinding to it is used when sampling when
Between, unit h；Q indicates pulp amount used in the closed circuit fine grinding system of type Selection Test, unit t；And according to calculating acquired results
Energy consumption curve is drawn, determines that the content of targeted particle size mineral reaches list when industry spot requires according to energy consumption curve
Position energy consumption Eis；
(E) it according to the in-situ processing amount to type selecting industry vertical stirring mill, is calculated using formula (2) vertical to type selecting industry
Power needed for formula agitator mill:
P=KQEis (2)
In formula, P is indicated to power needed for type selecting industry vertical stirring mill, unit kW；K indicates industrial mill operation ginseng
Number value coefficient, value range are 1.1~1.6；Q indicates that the in-situ processing amount to type selecting industry vertical stirring mill, unit are
t/h；EisIndicate that the content of targeted particle size mineral reaches specific energy consumption when industry spot requires, unit kWh/t.
The outer linear velocity of the blender of prototype version vertical stirring mill 3 and the stirring to type selecting industry vertical stirring mill
The outer linear velocity of device is equal.
Energy consumption curve obtained by the present embodiment step (D) is as shown in Figure 4.It can be obtained, be finely ground to by the energy consumption curve
Targeted particle size is -400 mesh, and the content of targeted particle size mineral reaches specific energy consumption when industry spot requires (content 95%)
EisFor 14.5kWh/t.The present embodiment is 70t/h, COEFFICIENT K value to type selecting industry vertical stirring mill site of deployment treating capacity
It is 1.1, then the power demand that scene is calculated to type selecting industry vertical stirring mill is about 1120kW.
Type selecting effect: the postindustrial vertical stirring mill of type selecting 1, installed power 1120kW, treating capacity are 68~75t/
H, it is 94.5~96.2% that granularity, which is -400 target minreal contents, in ore milling product, and ore grinding energy consumption is 13.5~15.1kWh/t.Choosing
The industrial products size distribution of the postindustrial vertical stirring mill ore grinding of type and the Lab Products size distribution of test ore grinding compare
As shown in Figure 5.
Embodiment 4:
The ore grinding object to type selecting industry vertical stirring mill of the present embodiment is copper mine, it is desirable that is finely ground to targeted particle size
For -600 mesh, the content of targeted particle size mineral is 95%.
Specific step is as follows for selection method:
(A) prepare the closed circuit fine grinding system of type Selection Test, the closed circuit fine grinding system of type Selection Test is that the type selecting of embodiment 1 is tried
Test closed circuit fine grinding system；
(B) it will be modulated into the ore pulp that concentration is 50% to ore grinding powder, prototype version vertical stirring mill 3 is added in the ore pulp
Interior, additional amount is the 150% of 3 cylinder volume of prototype version vertical stirring mill；
The specific steps of step (B) are as follows:
1) match ball: the medium ball for weighing and preparing in advance being added in 20L prototype version vertical stirring mill 3, medium ball
Filling rate is the 65% of 3 cylinder volume of prototype version vertical stirring mill.Medium ball selects diameter for 12mm:10mm:8mm:6mm:
4mm is that 1:2:3:3:1 is configured according to weight ratio.
2) ore pulp that modulation concentration is 50%: 15kg copper ore powder is weighed, surge tank valve 2 and ore pulp circulating slot valve are closed
5, it is added into surge tank 1 and weighs 50% water that miberal powder presses compound concentration institute water requirement, open the agitating device of surge tank 1；
Miberal powder is added, adds remaining 50% water, 5~10min of stirring is modulated into the ore pulp of required concentration；Miberal powder is to type selecting work
Industry vertical stirring mill use site is used to ore grinding powder, and after laboratory is dried, while measuring the grain of pulp
The data such as degree, density.
3) into slurry: open surge tank valve 2, open ore pulp circulating pump 6, make the ore pulp modulated quickly by cylinder lower part into
Enter in prototype version vertical stirring mill 3；During ore pulp is added, starts prototype version vertical stirring mill 3 and keep prototype version
3 slow running of vertical stirring mill closes surge tank valve 2 when in surge tank 1 without ore pulp, opens ore pulp circulating slot valve
5。
(C) starting prototype version vertical stirring mill 3 starts ore grinding test, stirs at interval of 3min~5min from prototype version is vertical
The overflow port sampling for mixing grinding machine 3 is primary, until sampling number terminates ore grinding test after being greater than 6 times；Measure sample obtained by every sub-sampling
The content (granularity of targeted particle size mineral be -325 mesh) of targeted particle size mineral and prototype version is vertical when every sub-sampling stirs in product
Mix the shaft power of the agitating shaft of grinding machine 3；The specific duration of test runs of this step is 50min, primary every 5min sampling, is taken every time
Sample should be 150ml~300ml in the same position of 3 overflow port of prototype version vertical stirring mill, each sampling amount.It is tested in ore grinding
In the process, the liquid level constant in the revolving speed holding ore pulp circulating slot 4 of ore pulp circulating pump 6, the ore pulp in ore pulp circulating slot 4 are adjusted
When liquid level is more than the bottom level of 4 blender of ore pulp circulating slot, the blender of Ying Kaiqi ore pulp circulating slot 4 keeps ore pulp sufficiently mixed
It closes.
(D) according to prototype version vertical mixing when the content of targeted particle size mineral in sample obtained by every sub-sampling and every sub-sampling
The shaft power of the agitating shaft of grinding machine 3, using formula (1) calculate from start ore grinding to every sub-sampling constantly unit energy in section
Consumption:
In formula, EsFor from ore grinding is started to the specific energy consumption in period when sampling, unit kWh/t；P2When indicating sampling
The shaft power of the agitating shaft of prototype version vertical stirring mill 3, unit kW；T indicate from start ore grinding to it is used when sampling when
Between (time used in fine grinding when sampling), unit h；Q indicates that pulp amount used in the closed circuit fine grinding system of type Selection Test, unit are
t；And energy consumption curve is drawn according to acquired results are calculated, determine that the content of targeted particle size mineral reaches according to energy consumption curve
Specific energy consumption E when being required to industry spotis；
(E) it according to the in-situ processing amount to type selecting industry vertical stirring mill, is calculated using formula (2) vertical to type selecting industry
Power needed for formula agitator mill:
P=KQEis (2)
In formula, P is indicated to power needed for type selecting industry vertical stirring mill, unit kW；K indicates industrial mill operation ginseng
Number value coefficient, value range are 1.1~1.6；Q indicates that the in-situ processing amount to type selecting industry vertical stirring mill, unit are
t/h；EisIndicate that the content of targeted particle size mineral reaches specific energy consumption when industry spot requires, unit kWh/t.
Energy consumption curve obtained by the present embodiment step (D) is as shown in Figure 6.It can be obtained, be finely ground to by the energy consumption curve
Targeted particle size is -600 mesh, and the content of targeted particle size mineral reaches specific energy consumption when industry spot requires (content 95%)
EisFor 22.5kWh/t.The present embodiment is 25t/h, COEFFICIENT K value to type selecting industry vertical stirring mill site of deployment treating capacity
It is 1.12, then it is 630kW that scene, which is calculated, to the power demand of type selecting industry vertical stirring mill.
Type selecting effect: the postindustrial vertical stirring mill of type selecting 2, installed power 315kW, treating capacity are 595~615t/
D, it is 94.5~95.8% that granularity, which is -600 target minreal contents, in ore milling product, and ore grinding energy consumption is 21.8~22.9kWh/t.Choosing
The industrial products size distribution of the postindustrial vertical stirring mill ore grinding of type and the Lab Products size distribution of test ore grinding compare
As shown in Figure 7.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example.To those of ordinary skill in the art, obtained improvement and change in the case where not departing from the technology of the present invention concept thereof
It changes and also should be regarded as protection scope of the present invention.
Claims (9)
1. a kind of selection method of industrial vertical stirring mill, comprising the following steps:
(A) prepare the closed circuit fine grinding system of type Selection Test, the closed circuit fine grinding system of type Selection Test includes that connection forms closed cycle
The prototype version vertical stirring mill (3) and circulator of grinding system；
It is characterized by also including following steps:
(B) it will be modulated into the ore pulp that concentration is 45%~70% to ore grinding powder, prototype version vertical mixing mill is added in the ore pulp
In machine (3), additional amount is the 110%~150% of prototype version vertical stirring mill (3) cylinder volume；
(C) the starting closed circuit fine grinding system of type Selection Test starts ore grinding test, at interval of 3min~5min from prototype version vertical mixing
The overflow port sampling of grinding machine (3) is primary, until sampling number terminates ore grinding test after being greater than 6 times；Measure sample obtained by every sub-sampling
In product the content of targeted particle size mineral and when every sub-sampling the agitating shaft of prototype version vertical stirring mill (3) shaft power；
(D) according to prototype version vertical stirring mill when the content of targeted particle size mineral in sample obtained by every sub-sampling and every sub-sampling
(3) shaft power of agitating shaft, using formula (1) calculate from start ore grinding to every sub-sampling constantly specific energy consumption in section:
In formula, EsFor from ore grinding is started to the specific energy consumption in period when sampling, unit kWh/t；P2It indicates to test when sampling
The shaft power of the agitating shaft of type vertical stirring mill (3), unit kW；T indicates from ore grinding is started to time used when sampling,
Unit is h；Q indicates mineral powder amount used in the closed circuit fine grinding system of type Selection Test, unit t；And it is drawn according to acquired results are calculated
Energy consumption curve determines that the content of targeted particle size mineral reaches unit energy when industry spot requires according to energy consumption curve
Consume Eis；
(E) it according to in-situ processing amount to type selecting industry vertical stirring mill, is calculated using formula (2) and is stirred to type selecting industry is vertical
Mix power needed for grinding machine:
P=KQEis(2)
In formula, P is indicated to power needed for type selecting industry vertical stirring mill, unit kW；K indicates that industrial mill operating parameter takes
Value coefficient, value range are 1.1~1.6；Q indicates the in-situ processing amount to type selecting industry vertical stirring mill, unit t/h；
EisIndicate that the content of targeted particle size mineral reaches specific energy consumption when industry spot requires, unit kWh/t.
2. the selection method of industrial vertical stirring mill according to claim 1, it is characterised in that: the step (B)
In, during ore pulp addition prototype version vertical stirring mill (3) is interior, start prototype version vertical stirring mill (3) and simultaneously protect
Prototype version vertical stirring mill (3) is held slowly to run.
3. the selection method of industrial vertical stirring mill according to claim 1, it is characterised in that: the step (C)
In, every sub-sampling is sampled in the same position of prototype version vertical stirring mill (3) overflow port, sampling amount be 150ml~
300ml。
4. a kind of closed circuit fine grinding system of type Selection Test for selection method described in claim 1, it is characterised in that: including connection
The prototype version vertical stirring mill (3) and circulator of closed cycle grinding system are formed, the circulator includes that ore pulp follows
Annular groove (4) and ore pulp circulating pump (6), the overflow port of the prototype version vertical stirring mill (3) and the charging of ore pulp circulating slot (4)
Mouth is connected, and the discharge port of the ore pulp circulating slot (4) is connected with the import of ore pulp circulating pump (6), the ore pulp circulating pump (6)
Outlet is connected with the feed inlet of prototype version vertical stirring mill (3), and the closed circuit fine grinding system of type Selection Test is additionally provided with for surveying
The power measurement device of the stirring shaft power of the fixed prototype version vertical stirring mill (3).
5. the closed circuit fine grinding system of type Selection Test according to claim 4, it is characterised in that: the power measurement device includes
Power measuring and the torque rating sensor (9) being installed on agitating shaft, the torque rating sensor (9) pass through signal wire
It is connected with power measuring.
6. the closed circuit fine grinding system of type Selection Test according to claim 4, it is characterised in that: the ore pulp circulating pump (6)
Pipeline between outlet and the feed inlet of prototype version vertical stirring mill (3) is equipped with ore pulp circulating slot valve (5).
7. the closed circuit fine grinding system of type Selection Test according to claim 6, it is characterised in that: the closed circuit fine grinding of type Selection Test
System further includes surge tank (1) and surge tank valve (2), the discharge port of the surge tank (1) and the import of surge tank valve (2)
It is connected, the outlet of the surge tank valve (2) is connected with the import of ore pulp circulating pump (6).
8. the closed circuit fine grinding system of type Selection Test according to any one of claims 4 to 7, it is characterised in that: the ore pulp
Circulating pump (6) is variable-frequency control pump.
9. the closed circuit fine grinding system of type Selection Test according to any one of claims 4 to 7, it is characterised in that: the test
The cylinder volume of type vertical stirring mill (3) is 9L~50L.
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