CN104307601B - Vertical mill model selecting test system and method - Google Patents
Vertical mill model selecting test system and method Download PDFInfo
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- CN104307601B CN104307601B CN201410531282.8A CN201410531282A CN104307601B CN 104307601 B CN104307601 B CN 104307601B CN 201410531282 A CN201410531282 A CN 201410531282A CN 104307601 B CN104307601 B CN 104307601B
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Abstract
The invention relates to the technical field of a building and a machine, in particular to a vertical mill model selecting test system and method. The vertical mill model selecting test system comprises a feeding device, a vertical mill main machine, a dust collector, a fan, an electric control system and an analysis instrument, wherein the lower part of a storage cabin of the feeding device is connected with a hopper lifting machine and a star feeding valve through a pipeline, the star feeding valve is connected with the vertical mill main machine through a pipeline, the upper part of the vertical mill main machine is connected with a left inlet position of the dust collector through a pipeline, the right upper part of the dust collector is provided with the fan, the dust collector comprises a bag-type dust collector, a dust collection discharging device and a dust collection reamer, and the analysis device comprises an analysis scale and a negative pressure screening machine. The vertical mill model selecting test system has advantages that the performance of the material is tested, such milling characteristics of the material as grindability and abradability can be accurately analyzed, the electric consumption, the product fineness and the abrasion amount are comprehensively analyzed, the guarantee value of the unit electric consumption of the industrial mill can be determined, the abradability of a specific material can be effectively calculated, and the specification model selection and structure design accuracy of the industrial vertical mill can be greatly improved.
Description
[technical field]
The present invention relates to build and field of mechanical technique, a kind of specifically Vertical Mill type Selection Test system and method.
[background technology]
It is equally known that cement industry is the typical energy and Resource Dependence type industry, with the development of national economy, I
The energy-conserving and environment-protective task of state's cement industry is increasingly severe, and energy-saving and emission-reduction have turned into the current important topic of China's cement industry.
Industrial vertical mill is the preferred equipment of grinding system in manufacture of cement, few with taking up an area, the features such as energy-conserving and environment-protective, extensively
Apply to cement producing line.In order to ensure that grinding performance and yield of the Vertical Mill in grinding system reach design objective, generally
Material carries out the performance test of grindability and abrasion etc..The physical property test of material, usually in the experiment Vertical Mill system of miniaturization
Carried out in system, mainly determine the physical parameters such as the grindability and the abrasion to high-abrasive material of various materials, the Vertical Mill of raw material is easy
Mill sex index is to determine Vertical Mill specification, carries out the important evidence of system configuration and design, and abrasion sex index is to judge Vertical Mill to tool
The adaptation situation of body raw material, is used to judge the maintenance period of wear-out part, is the specification type selecting of industrial vertical mill, structure design and resistance to
Grind selection of material etc. and basic data support and technical guarantee are provided.
[content of the invention]
It is an object of the invention to provide a kind of pilot system to large-scale Vertical Mill design selection, existed by determining different material
The energy consumption produced in experimental rig, determines the characteristic of material, including grindability and abrasion, the final model for determining industrial vertical mill
The Vertical Mill type Selection Test system and method for specification.
To achieve the above object, a kind of Vertical Mill type Selection Test system, including drawing-in device 1, Vertical Mill main frame 2 are designed, is gathered dust
Device 3, blower fan 4, electric-control system and analytical instrument, the bottom of drawing-in device Storage Silo 5 connect bucket elevator 6 and star-like by pipeline
Feeding valve 7, described star-like feeding valve 7 connects Vertical Mill main frame 2 by pipeline, and the described top of Vertical Mill main frame 2 is connected by pipeline
The left hand inlet port position of bag filter 8 is connect, the described right upper portion of dust-precipitator 3 is provided with blower fan 4, and described dust-precipitator includes pocket type
Dust-precipitator 8, gather dust blanking device and the reamer 10 that gathers dust, and described analytical instrument includes assay balance and negative pressure screening machine.
The rear of dust-precipitator sets blower fan, it is ensured that whole pilot system is in negative pressure state, does not outwards spill dust, not right
Environmental effects.
A kind of Vertical Mill type Selection Test system and method, the method is comprised the following steps：
A. preparation before on-test：The grinding roller in experiment Vertical Mill is pulled down, four roller tires thereon are then removed, cleaned
Afterwards weight, and record data m are weighed with balance1、m2、m3、m4, grinding machine is checked, roller tire is reinstalled, grinding roller is reinstalled, by Vertical Mill assembling also
It is former；Initial setting, grinding machine air quantity 480m3/ h, hydraulic coupling 50bar；Fineness regulation：When powder concentrator=650 rev/min, product
Fineness is 12%R90 μm, often adjusts 50 revs/min, and product fineness regulation 1% adjusts powder concentrator rotating speed；And calculating and regulation are fed
Doses, P=(2.5kW)/Bond work index；
B. firing test Vertical Mill device：Record time on-test t1, bucket elevator, wind are started by electric-control system successively
Machine, gather dust blanking device, and gather dust reamer, Vertical Mill, and star-like feeding valve, feeding reamer, qualified product collect into powder through bag collector
Dirt, then by gather dust reamer and the blanking device discharge of gathering dust under dust-precipitator, collection obtains product；
C. product fineness is determined：The product for obtaining will be collected every 5min time samplings, while recording now automatically controlled control
All setup parameters on cabinet, these parameters include：Mill feeding amount M, thickness of feed layer H, grinding machine vibration, discrepancy mill hot blast temperature
(T1, T2), inlet outlet pressure differential (P in grinding machine1, P2), powder concentrator frequency (f)；
D. fineness deviation：Regulation powder concentrator frequency, and then powder concentrator rotating speed is adjusted, powder concentrator rotating speed is bigger, and fineness is higher,
Also adjustable systems air quantity, fineness is higher, reduces air quantity, and fineness is lower, increases air quantity, and mill power deviation adjusts feeding capacity
And grinding pressure, grinding machine thickness of feed layer, adjust feeding capacity and grinding pressure；
E. off-test：Time t after record off-test2With power consumption w2, it is vented grinding machine, product gross weight after grinding of weighing
m7, grinding machine and grinding roller roller tire are dismantled, weigh weight, and record data m with balance after cleaning8,、m9、m10、m11, check grinding machine, dress
Roller tire is returned, grinding roller is reinstalled, Vertical Mill is assembled and is reduced；
F. the calculating of screen over-size：R=m6/ 25 × 100%；
G. yield in unit time：m12=m7/t3× 60, test period subtracts the time started for the end time：t3=t2-t1；
H. unit power consumption amount is calculated：P=w3/t3×60/m12× 1000, the electricity before and after testing in ammeter subtracts each other acquisition
Experiment power consumption, w3=w2-w1；
I. damage amount is calculated：Weight difference of four grinding rollers before and after grinding experiment is subtracted each other, each mill in grinding process is obtained
The wear extent of roller, then adds up to and draws total wear extent m14, and calculate the wear rate A, A=m of the material14/m7；
J. parameter conversion formula：Fineness conversion factor ispIt is required that=pIt is actual
×f。
The present invention compared with the existing technology, the advantage is that：By electric-control system start drawing-in device, Vertical Mill, dust-precipitator,
Blower fan, takes finished product sample after fixed interval, and instrument determines finish fineness by analysis, can repeatedly be adjusted in process of the test
Running status carries out performance test after the completion of experiment to balancing to material, the grinding characters of accurate analysis material, including grindability
And abrasion, to power consumption, product fineness, wear extent comprehensive analysis, can effectively draw the unit power consumption amount of industrial vertical mill,
The specifications and models of correspondence industrial mill are calculated, the guarantee value of industrial mill unit power consumption amount is determined, also can effectively be calculated
Go out the abrasion of specific material, calculate industrial vertical mill from the time for running to hardfacing reparation, specify its guarantee value, significantly
Improve industrial vertical mill specification type selecting and structure design accuracy.
[brief description of the drawings]
Fig. 1 is the schematic diagram for testing vertical mill system flow；
Fig. 2 is the structural representation front view for testing vertical mill system；
Fig. 3 is the structural representation side view for testing vertical mill system；
In figure：1. 2. Vertical Mill main frame of drawing-in device, 3. dust-precipitator, 4. blower fan, 5. Storage Silo, 6. bucket elevators 7. are star-like
The bag filter 10. of feeding valve 8. gathers dust reamer；
Fig. 1 is specified as Figure of abstract of the invention.
[specific embodiment]
The invention will be further described below in conjunction with the accompanying drawings, for the structure and principle of this device people professional to this
It is very clearly.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to limit this
Invention.
Referring to Fig. 1, Fig. 2 and Fig. 3：
1. drawing-in device：
Drawing-in device includes Storage Silo, feeding reamer, bucket elevator and star-like feeding valve, and Storage Silo is used for storage test
The material of required grinding, inventory needed for once testing is about 500kg；Bucket elevator is used for the material lifting needed for experiment extremely
Storage Silo and the coarse granule material that will be thrown away outside grinding disc of vertical mill and can not be blown afloat by hot blast are promoted to Storage Silo, shape again
Into external circulating system；Feeding reamer is located at Storage Silo lower section, for controlling feeding capacity；Star-like feeding valve enters positioned at Vertical Mill
Mouthful, for locking wind, it is ensured that Vertical Mill negative pressure is run.
2. Vertical Mill：
Vertical Mill is broadly divided into upper and lower two big regions：Bottom is grinding region, mainly by housing, transmission, mill, grinding roller and liquid
Force feed station composition, wherein housing includes shell and base；Transmission includes reducing motor and the shaft coupling being connected with mill, for band
Movable grinding disc is rotated；Mill has 20 ° of inclination angles, and material is rolled grinding above mill, and because the effect of centrifugal force is thrown out of
Mill；Grinding roller quantity is four, is distributed on mill top；Hydraulic oil unit is located at Vertical Mill side, is mainly used in pressurization, there is provided grinding roller
The pressure for grinding downwards, top is powder-separating area domain, mainly by powder concentrator, rotor, guide vane and powder concentrator reducing motor；
The rotating speed of rotor of powder separator is adjusted by powder concentrator deceleration variable-frequency motor, so as to adjust product fineness.
3. dust-precipitator：
Dust-precipitator includes bag filter, gather dust blanking device and the reamer that gathers dust, and bag filter discharges with roller mill separator
Mouth is coupled together by pipeline, for collecting fine powder, the revolution reamer control blanking velocity of lower section.
4. blower fan：
Blower and pipeline is connected with dust-precipitator, it is ensured that system negative pressure is run, it is ensured that whole system is clear in the process of running
It is clean pollution-free.
5. electric-control system
Included by the operational factor in the component record system equipment such as sensor, pressure gauge, flowmeter：Mill feeding
Inlet outlet pressure differential, powder concentrator rotating speed etc. in hot blast temperature, grinding machine are ground in amount, thickness of feed layer, grinding machine vibration, discrepancy；By electrical control cubicles
Above-mentioned data digital display is gone out, after record data, fineness parameter regulation feeding capacity according to analytical instrument etc..
6. analytical instrument：
Analytical instrument mainly includes assay balance, baking oven and negative pressure screening machine.It is mainly used in determining product fineness and water
Point.
Specifically used step of the invention is：
A. preparation before on-test
The grinding roller in experiment Vertical Mill is pulled down, four roller tires thereon are then removed, weight is weighed with balance after cleaning, and remember
Record data m1、m2、m3、m4, grinding machine is checked, roller tire is reinstalled, grinding roller is reinstalled, Vertical Mill is assembled and is reduced.The original of laboratory will be sampled to
Material, first through jaw crushing crusher machine, controls out disintegrating machine raw meal particle size to be less than 8mm.If material moisture is more than 1%, can add
Hot-blast stove is dried in process of the test, if without heating in process of the test, then need to dry and ensure feeding in advance
Moisture is within 1%.Material after will be broken is transported in Storage Silo, and records raw material weight m5, initial power consumption w1(control
Raw material weight is in 500kg or so).
Initial setting, grinding machine air quantity 480m3/ h, hydraulic coupling 50bar；Fineness regulation：When powder concentrator=650 rev/min,
Product fineness is 12%R90 μm, often adjusts 50 revs/min, product fineness regulation 1%, according to actual product fineness requirement, adjustment
Powder concentrator rotating speed；And calculate and regulation feeding capacity, P=(2.5kW)/Bond work index (takes if Bond's work(test is not carried out
Sample 200kg/h).
B. firing test Vertical Mill device
Record time on-test t1Bucket elevator is started by electric-control system successively, blower fan, gather dust blanking device, hinge of gathering dustKnife, Vertical Mill, star-like feeding valve, feeding reamer, then crush after material transport feeding Storage Silo in, by under feed bin canAdjust star-like feeding valve and feeding reamer and grinding is rolled into grinding, mill is driven by lower section reductor and rotates, the powder on millGrind materials throw away mill edge due to the effect of centrifugal force, and the powder concentrator taken to above grinding roller by the hot blast that nozzle ring spraysIn.Fine powder is screened in powder concentrator, and a part of meal is fallen into mill center and further ground, and another part meal is carried through bucketMachine outer circulation enters Storage Silo and circulates grinding, the dust that and product fineness can be by rotor blade rotational speed regulation.Qualified product is received through bag dirt device is collected is by gather dust reamer and the blanking device discharge of gathering dust under dust-precipitator, collection obtains product
C. product fineness is determined
The product for obtaining will be collected every 5min time samplings, while recording all settings ginseng on now Automatically controlled control cabinet numbers, these parameters include: mill feeding amount M, thickness of feed layer H, grinding machine vibrates, and come in and go out mill hot blast temperature (T1,T2), inlet outlet pressure differential (P in grinding machine1, P2), powder concentrator frequency (f) etc..The product assay balance for obtaining will be sampled and weigh 25g；Experiment is poured into want
Ask the negative pressure of fineness to sieve (generally 90 μm), negative pressure sieve is put into negative pressure pulp classifier, cover glass cover, open negative pressure screening
Instrument, after running 2 minutes, takes out and weighs oversize, record data m6, and calculate the percentage R of screen over-size.
D. running status is adjusted
Fineness deviation:According to requirement of experiment fineness, if fineness is higher, powder concentrator frequency is adjusted, and then powder is selected in regulation Machine rotating speed, powder concentrator rotating speed is bigger, and fineness is higher; Also adjustable systems air quantity, fineness is higher, reduces air quantity; Fineness is lower, increases Wind Volume;
Mill power deviation: Regulation feeding capacity and grinding pressure;
Grinding machine thickness of feed layer：Regulation feeding capacity and grinding pressure.
E. off-test
The situation for maintaining product fineness certain, after having ground all materials in Storage Silo, the time after record off-test
t2With power consumption w2, it is vented grinding machine, product gross weight m after grinding of weighing7, grinding machine and grinding roller roller tire are dismantled, weighed with balance after cleaning
Weight, and record data m8,、m9、m10、m11, grinding machine is checked, roller tire is reinstalled, grinding roller is reinstalled, Vertical Mill is assembled and is reduced.
F. data are calculated
The calculating of screen over-size：R=m6/ 25 × 100%；
Yield in unit time：m12=m7/t3× 60, test period subtracts the time started for the end time: t3＝t2-t1
Unit power consumption amount is calculated: p=w3/t3*60/m12× 1000, the electricity before and after testing in ammeter subtracts each other and is tried
Test power consumption, w3=w2-w1；
G. wear extent is calculated
Weight difference of four grinding rollers before and after grinding experiment is subtracted each other, the wear extent of each grinding roller in grinding process is obtained,
Then add up to and draw total wear extent m14, and calculate the wear rate A of the material；A=m14/m7, m14=(m8-m1)+(m9-m2)+
(m10-m3)+(m11-m4)；
H. parameter conversion formula
Fineness result is measured in experiment may specify fineness not to be inconsistent, it is necessary to its data conversion, be converted to industrial vertical mill
Unit power consumption amount under industrial vertical mill fineness requirement, specific conversion formula is as follows：
Fineness conversion factor：
pIt is required that=pIt is actual×f 。
Claims (1)
1. a kind of Vertical Mill type Selection Test system, including drawing-in device (1), Vertical Mill main frame (2), dust-precipitator (3), blower fan (4) is automatically controlled
System and analytical instrument, it is characterised in that the bottom of drawing-in device Storage Silo (5) connects bucket elevator (6) and star-like by pipeline
Feeding valve (7), described star-like feeding valve (7) connects Vertical Mill main frame (2) by pipeline, and described Vertical Mill main frame (2) top leads to
Piping connects dust-precipitator (3) left hand inlet port position, and described dust-precipitator (3) right upper portion is provided with blower fan (4), and described gathers dust
Device includes bag filter (8), gather dust blanking device and the reamer that gathers dust (10), and described analytical instrument includes assay balance and negative pressure
Screening machine, dust-precipitator rear is provided with blower fan, it is ensured that whole Vertical Mill operation is in negative pressure state, does not outwards spill dust, the Vertical Mill
The method of work of type Selection Test system is comprised the following steps：
A. preparation before on-test：The grinding roller in experiment Vertical Mill is pulled down, four roller tires thereon are then removed, used after cleaning
Balance weighs weight, and record data m1、m2、m3、m4, grinding machine is checked, roller tire is reinstalled, grinding roller is reinstalled, Vertical Mill is assembled and is reduced；
Initial setting, grinding machine air quantity 480m3/ h, hydraulic coupling 50bar; Fineness regulation: When the rotating speed of powder concentrator is 650 revs/min, produce Product fineness is 12%R90 μm, often adjusts 50 revs/min, and product fineness regulation 1% adjusts powder concentrator rotating speed; And calculate and adjust Feeding capacity PRegulation feeding capacity=(2.5kW)/Bond work index, wherein sampling 200kg/h if Bond's work(test is not carried out;
B. firing test Vertical Mill device: record time on-test t1, bucket elevator is started by electric-control system successively, blower fan gathers dust Blanking device, gather dust reamer, Vertical Mill, star-like feeding valve, feeding reamer, and qualified product collects into dust through bag filter, then By gather dust reamer and blanking device discharge of gathering dust under dust-precipitator, collection obtains product;
C. product fineness is determined: the product for obtaining will be collected every 5min time samplings, while recording on now Automatically controlled control cabinet All setup parameters, these parameters include: mill feeding amount M, thickness of feed layer H, grinding machine vibration enters to grind hot blast temperature, goes out mill Hot blast temperature, inlet outlet pressure differential in grinding machine, powder concentrator frequency f;
D. fineness deviation：Regulation powder concentrator frequency, and then powder concentrator rotating speed is adjusted, powder concentrator rotating speed is bigger, and fineness is higher, or adjusts
Section systematic air flow, fineness is higher, reduces air quantity, and fineness is lower, increases air quantity；Mill power deviation, adjusts feeding capacity and grinding
Pressure；Grinding machine thickness of feed layer, adjusts feeding capacity and grinding pressure；E. off-test：Time t after record off-test2And power consumption
w2, it is vented grinding machine, product gross weight m after grinding of weighing7, grinding machine and grinding roller roller tire are dismantled, weight is weighed with balance after cleaning, and
Record data m8,、m9、m10、m11, grinding machine is checked, roller tire is reinstalled, grinding roller is reinstalled, Vertical Mill is assembled and is reduced;
F. the calculating of screen over-size: R=m6/ 25 × 100%, the product assay balance for obtaining will be sampled and weigh 25g, pour into experiment The negative pressure sieve of required fineness, negative pressure sieve is put into negative pressure pulp classifier, covers glass cover, opens negative pressure pulp classifier, operation are after 2 minutes, take out and weigh oversize, record data m6, and calculate the percentage R of screen over-size；
G. yield in unit time：m12=m7/t3× 60, test period subtracts the time started for the end time：t3=t2-t1；
H. unit power consumption amount is calculated：pUnit power consumption amount=w3/t3×60/m12× 1000, the electricity before and after testing in ammeter subtracts each other acquisition
Experiment power consumption, w3=w2-w1, w1It is initial power consumption；
I. damage amount is calculated: weight difference of four grinding rollers before and after grinding experiment are subtracted each other, the wear extent of each grinding roller in grinding process is obtained, are then added up to and is drawn total wear extent m14, and calculate the wear rate A, A=m of material14/m7；
J. parameter conversion formula: fineness conversion factor ispIt is required that unit power consumption amount=
pEffective unit power consumption× fineness conversion factor f.
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| CN106040367A (en) * | 2016-08-03 | 2016-10-26 | 无锡得戟重工有限公司 | Grinding device for cement production |
| CN106644639B (en) * | 2016-12-22 | 2019-04-05 | 长沙矿冶研究院有限责任公司 | The closed circuit fine grinding system of the selection method and type Selection Test of industrial vertical stirring mill |
| CN107884300A (en) * | 2017-11-10 | 2018-04-06 | 农业部南京农业机械化研究所 | A kind of cereal percentage of damage, percentage of impurity detection means and detection method |
| CN108906306B (en) * | 2018-07-02 | 2020-10-27 | 山东世联环保科技开发有限公司 | Variable tracking control method for cement raw material vertical mill |
| CN110008643B (en) * | 2019-04-29 | 2023-07-11 | 中国建筑材料科学研究总院有限公司 | Material grindability evaluation method, material grinding time and grinding material fineness prediction method |
| CN111855249B (en) * | 2020-07-29 | 2022-11-22 | 四川皇龙智能破碎技术股份有限公司 | Powder preparation system test method |
| CN115739275B (en) * | 2022-11-01 | 2024-01-26 | 河北苹乐面粉机械集团有限公司 | Automatic pulverizer |
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| US2237021A (en) * | 1938-10-08 | 1941-04-01 | Comb Eng Co Inc | Air flow control for bowl mills |
| US3511445A (en) * | 1968-04-05 | 1970-05-12 | Ronald A Ashdown | Air flow control means for pulverizing mill |
| CN101152636A (en) * | 2006-09-28 | 2008-04-02 | 上海宝田新型建材有限公司 | Production control logical system for blast-furnace cinder grinder |
| CN201415147Y (en) * | 2009-06-26 | 2010-03-03 | 南京凯盛水泥技术工程有限公司 | Material grinding system |
| CN102151605A (en) * | 2011-03-17 | 2011-08-17 | 浙江大学 | Advanced control method and system for vertical mill based on model identification and predictive control |
| CN203054470U (en) * | 2012-12-10 | 2013-07-10 | 上海凯盛节能工程技术有限公司 | Overall control structure of vertical mill |
| CN103028480B (en) * | 2012-12-10 | 2015-04-22 | 上海凯盛节能工程技术有限公司 | Intelligent control system for vertical mill based on fuzzy PID (proportion integration differentiation) algorithm |
| CN103386354A (en) * | 2013-07-22 | 2013-11-13 | 南通万豪建材科技有限公司 | Production method of superfine slag powder |
| CN103934082A (en) * | 2014-05-14 | 2014-07-23 | 南通利元亨机械有限公司 | Novel mineral slag grinding system |
| CN204234140U (en) * | 2014-10-10 | 2015-04-01 | 上海凯盛节能工程技术有限公司 | A kind of Vertical Mill type Selection Test system |
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