CN103521445A - Concrete dry aggregate continuous multistage air classification method - Google Patents

Concrete dry aggregate continuous multistage air classification method Download PDF

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Publication number
CN103521445A
CN103521445A CN201310456719.1A CN201310456719A CN103521445A CN 103521445 A CN103521445 A CN 103521445A CN 201310456719 A CN201310456719 A CN 201310456719A CN 103521445 A CN103521445 A CN 103521445A
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selection
winnowing
aggregate
classification
classification case
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CN103521445B (en
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王建军
彭训民
李兰儒
王红伟
吴善试
郭靖
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XINJIANG YUXIN CONCRETE Co Ltd
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XINJIANG YUXIN CONCRETE Co Ltd
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Abstract

The invention discloses a concrete dry aggregate continuous multistage air classification method which is achieved by means of the following steps that mixed aggregate is thrown into the same sealed space, multistage air classification is carried out continuously on the mixed aggregate, and the mixed aggregate is divided into classified aggregate within multiple particle diameter ranges. According to the concrete dry aggregate continuous multistage air classification method, multistage air classification is carried out on the mixed aggregate continuously to enable particle sizes of classified aggregate to be more concentrated; soil and stone powder blended in the mixed aggregate are separated from the classified aggregate through continuous multistage air classification and are discharged, the classified aggregate is clean, the steps of water washing and dewatering can be omitted, the technological process is shortened, cost is reduced, and quality of concrete finished products is improved.

Description

A kind of concrete is dried aggregate continuous multi-stage selection by winnowing stage division
Technical field
The present invention relates to industrial production every profession and trade drying solid material and sort classification field, particularly the dry aggregate selection by winnowing stage division of a kind of concrete.
Background technology
At concrete production field, that country advocates is energetically high-quality, high-quality, concrete production technique cheaply, thereby reaches energy-saving and cost-reducing object.And country also encourages environmental protection, energy-saving production energetically, make every effort to enhance productivity, reduce production costs, reduce man-made noise, reduce dust pollution, improve haze weather.
In commerical ready-mixed concrete configuration is produced, at present indivedual enterprises have the dry aggregate selection by winnowing hierarchy system of the concrete of employing to carry out classification choosing to aggregates such as sand, stone and mineral additives.As shown in Figure 1 to Figure 3, this selection by winnowing hierarchy system mainly comprises air blast 1a, selection by winnowing classification case 2a, cyclonic filter equipment 3a and the control of dust filter plant 4a accepting successively.On the top tank wall of selection by winnowing classification case 2a, have charging aperture, on the under casing wall of selection by winnowing classification case 2a, have a plurality of discharging openings, each discharging opening respectively correspondence is provided with rewinding storehouse 21a, and rewinding storehouse 21a is divided into one-level rewinding storehouse, secondary rewinding storehouse, three grades of rewinding storehouses etc. successively.
Selection by winnowing grading technology is as follows: air blast 1a blows in selection by winnowing classification case 2a, and combined aggregate (without selection by winnowing classification) is heavy curtain shape by the charging aperture on selection by winnowing classification case 2a and enters in selection by winnowing classification case 2a.Combined aggregate in selection by winnowing classification case 2a is subject to by quality size, resequencing, assemble in selection by winnowing classification case 2a after gas shock, is passively classified into separated aggregate identical or close proportion, different-grain diameter level scope.The particle diameter of separated aggregate is assembled from big to small, correspondence is divided into coarse aggregate in one-level coarse aggregate, secondary, three grades of fine aggregates etc., and drop to corresponding discharging opening place, by after this discharging opening respectively correspondence fall in one-level rewinding storehouse, secondary rewinding storehouse, three grades of rewinding storehouses, thereby realized classification, sort.
But, after the sorting of existing selection by winnowing hierarchy system still there is following problem in the particle diameter of resulting aggregates at different levels: the one, concentrate not, aggregate content in the aggregates at different levels that obtain after selection by winnowing in same particle size range is on the low side, can not meet the grating requirement of concrete configuration production technology to different-grain diameter level aggregate.The 2nd, the aggregate after selection by winnowing still adheres to and contains a certain amount of stone flour, earth, and when ready-mixed concrete, stone flour and earth can reduce the concrete quality of finished product.
In order to address the above problem, the applicant has applied for " a kind of concrete is dried aggregate continuous multi-stage selection by winnowing classification case ", it comprises casing, by dividing plate, the interior separation of casing is become to upper selection by winnowing classification case and lower selection by winnowing classification case, one end portion of upper selection by winnowing classification case and lower selection by winnowing classification case respectively correspondence is provided with enterprising air port and lower air inlet, and the other end of upper selection by winnowing classification case and lower selection by winnowing classification case respectively correspondence is provided with air outlet and lower air outlet; On the top tank wall of upper selection by winnowing classification case, near enterprising air port, have charging aperture, on the under casing wall of lower selection by winnowing classification case, along wind direction, be laid with a plurality of discharging openings, on dividing plate, corresponding a plurality of discharging openings are laid with a plurality of classification material mouths.
Combined aggregate is the free-falling of heavy curtain shape from charging aperture, can be in the wind to select in classification case and lower selection by winnowing classification case and carry out continuously two-stage selection by winnowing.Like this, earth and stone flour are discharged outside continous way multistage pneumatic separation classification case from upper air outlet and lower air outlet respectively by continuous two-stage selection by winnowing; And combined aggregate is divided into aggregates at different levels after continuous two-stage selection by winnowing, aggregates at different levels are discharged outside continous way multistage pneumatic separation classification case by a plurality of discharging openings are corresponding.
Therefore, be necessary, for the dry aggregate continuous multi-stage selection by winnowing classification case of this concrete, to research and develop a kind of continuous multi-stage selection by winnowing stage division.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of concrete to be dried aggregate continuous multi-stage selection by winnowing stage division, can make the particle diameter of separated aggregate concentrate, can at utmost reduce again after classification the content of earth, stone flour and dust in different-grain diameter level aggregate, without carrying out again follow-up washing and dehydration procedure, reduce technological process, greatly reduce aggregate preparation cost.
In order to reach above-mentioned purpose, solution of the present invention is:
A dry aggregate continuous multi-stage selection by winnowing stage division, realizes by following steps: combined aggregate is rendered in same enclosure space and carried out continuously multistage pneumatic separation classification, is divided into the separated aggregate in some grades of particle size range.
Described combined aggregate carries out continuously multistage pneumatic separation classification in continous way multistage pneumatic separation classification case; Wherein, continous way multistage pneumatic separation classification case comprises casing, by dividing plate, the interior separation of casing is become to upper selection by winnowing classification case and lower selection by winnowing classification case, one end portion of upper selection by winnowing classification case and lower selection by winnowing classification case respectively correspondence is provided with enterprising air port and lower air inlet, and the other end of upper selection by winnowing classification case and lower selection by winnowing classification case respectively correspondence is provided with air outlet and lower air outlet; On the top tank wall of upper selection by winnowing classification case, near enterprising air port, have charging aperture, on the under casing wall of lower selection by winnowing classification case, along wind side, be laid with a plurality of discharging openings, on dividing plate, corresponding a plurality of discharging openings are laid with a plurality of classification material mouths, and classification material mouth place is provided with the check valve of opening towards lower selection by winnowing classification case.
Described combined aggregate is rubbed before entering described continous way multistage pneumatic separation classification case.
The described step of rubbing adopts and to rub deslimer and carry out, and wherein, rub deslimer and comprise casing, emery wheel and driving mechanism, the driving mechanism emery wheel that is in transmission connection, emery wheel is arranged in casing in revolvable mode; The wheel face of emery wheel is provided with main mill layer, and on the internal box wall of casing, corresponding main mill layer is provided with secondary mill layer, a plurality of protruding mill portion that the outer surface of main mill layer and secondary mill layer protrudes respectively that formation rubs that aggregate uses.
The described step of rubbing adopts and to rub deslimer and carry out, wherein, described in rub deslimer and comprise casing, emery wheel and driving mechanism, the driving mechanism emery wheel that is in transmission connection, emery wheel is two, two emery wheels are arranged in casing in the mode of the aggregate that can rotate and knead; The wheel face of emery wheel is provided with main mill layer, and the outer surface of main mill layer protrudes and forms a plurality of protruding mill portion of rubbing to grinding that aggregate uses.
Described rubbing in step, the described combined aggregate of rubbing enters in described upper selection by winnowing classification case and is windward type blanking.
By air blast, in described lower selection by winnowing classification case, blow, carry out selection by winnowing classification.
The wind of discharging in described continous way multistage pneumatic separation classification case filters, and then sends in described upper selection by winnowing classification case and carry out selection by winnowing classification.
Described dividing plate is towards a plurality of funnelform upper collecting bins of the surface of described upper selection by winnowing classification case formation protruding upward, and on each, the corresponding described classification material mouth of collecting bin difference arranges.
The wind that described combined aggregate recycles in continous way multistage pneumatic separation classification case carries out multistage pneumatic separation classification.
Adopt after said method, the dry aggregate continuous multi-stage selection by winnowing stage division of a kind of concrete of the present invention has following beneficial effect:
One, in same enclosure space, combined aggregate is carried out to multistage pneumatic separation continuously, make the particle diameter of aggregate gradation more concentrated; And the earth being mingled with in combined aggregate and stone flour separate with separated aggregate and discharged by continuous multi-stage selection by winnowing, separated aggregate is clean, can exempt and washing and dehydration, and shortened process, reduces costs, the concrete quality of raising finished product.
Two, in continous way multistage pneumatic separation classification case, utilize wind energy to carry out continuously two-stage selection by winnowing to combined aggregate, can assemble rapidly classification by the grain-size grade scope of aggregate, improve dry aggregate gradation and sort efficiency, make the particle diameter of aggregate gradation more concentrated; And due to the earth being mingled with in combined aggregate and its proportion of stone flour less with respect to combined aggregate, like this, earth and stone flour are discharged outside continous way multistage pneumatic separation classification case from upper air outlet and lower air outlet respectively by continuous two-stage selection by winnowing, have greatly reduced the earth in aggregates at different levels and stone flour after selection by winnowing; And combined aggregate is divided into aggregates at different levels after continuous two-stage selection by winnowing, aggregates at different levels are discharged outside continous way multistage pneumatic separation classification case by a plurality of discharging openings are corresponding; Separated aggregate is clean, can exempt washing and dehydration, and shortened process, reduces costs, and improves the concrete quality of finished product.
Three, combined aggregate is rubbed by rubbing deslimer, can peel off earth, stone flour that aggregate surface adheres to; Or the combined aggregate being sticked together is rubbed scattered, earth is twisted into ash or is twisted into fritter, be conducive to follow-uply in continous way multistage pneumatic separation classification case, carry out selection by winnowing classification, ash discharge.
Four, by air-introduced machine, will be introduced in upper selection by winnowing classification case and carry out selection by winnowing classification through filtered air, the mode of this air inducing recycling also can reduce pollution, save energy consumption.
Accompanying drawing explanation
Fig. 1 is the structural representation of the dry aggregate selection by winnowing hierarchy system of existing concrete;
Fig. 2 is the structural representation one of the selection by winnowing classification case in existing selection by winnowing hierarchy system;
Fig. 3 is the structural representation two of the selection by winnowing classification case in existing selection by winnowing hierarchy system;
Fig. 4 a is the structural representation one of the dry aggregate continuous multi-stage selection by winnowing hierarchy system of a kind of concrete of adopting in the present invention;
Fig. 4 b is the structural representation two of the dry aggregate continuous multi-stage selection by winnowing hierarchy system of a kind of concrete of adopting in the present invention;
Fig. 5 is the structural representation three of the dry aggregate continuous multi-stage selection by winnowing hierarchy system of a kind of concrete of adopting in the present invention;
Fig. 6 is the structural representation of the dry aggregate continuous multi-stage selection by winnowing grading plant of a kind of concrete of adopting in the present invention;
Fig. 7 is the working state schematic representation of the dry aggregate continuous multi-stage selection by winnowing grading plant of a kind of concrete of adopting in the present invention;
Fig. 8 is the structural representation of another embodiment that rubs deslimer that adopts in the present invention;
Fig. 9 is the flow chart of the dry aggregate continuous multi-stage selection by winnowing stage division of a kind of concrete of the present invention;
Figure 10 is that the present invention adopts air-introduced machine to the flow chart of blowing in upper selection by winnowing classification case.
In figure:
Air blast 1a selection by winnowing classification case 2a
Rewinding storehouse 21a cyclonic filter equipment 3a
Control of dust filter plant 4a continous way multistage pneumatic separation grading plant 10
Material-falling hopper 11 is rubbed deslimer 12
The secondary mill layer of casing 121 121a
The main mill layer of emery wheel 122 122a
Clearance adjustment mechanism 123 adjusting rods 124
Spring 125 continous way multistage pneumatic separation classification casees 13
Selection by winnowing classification case 131a on casing 131
The enterprising air port 131c of lower selection by winnowing classification case 131b
Air inlet 131e under upper air outlet 131d
Lower air outlet 131f charging aperture 131g
The upper collecting bin 131i of discharging opening 131h
Dividing plate 132 classification material mouth 132a
Check valve 132b rewinding storehouse 14
One-level rewinding storehouse 14a secondary rewinding storehouse 14b
Three grades of rewinding storehouse 14c level Four rewinding storehouse 14d
Pyatyi rewinding storehouse 14e air blast 20
21 times adjustable plates 22 of adjusted plate
Cyclonic filter equipment 30 control of dust filter plants 40
Air-introduced machine 45
The specific embodiment
In order further to explain technical scheme of the present invention, below by specific embodiment, the present invention will be described in detail.
Embodiment mono-
As shown in Fig. 4 a to Fig. 8, a kind of concrete of the present invention is dried aggregate continuous multi-stage selection by winnowing stage division, adopts a kind of concrete to be dried aggregate continuous multi-stage selection by winnowing hierarchy system.This system comprises continous way multistage pneumatic separation grading plant 10, air blast 20, cyclonic filter equipment 30, control of dust filter plant 40 and the air-introduced machine 45 of accepting successively.
Continous way multistage pneumatic separation grading plant 10 comprises the material-falling hopper 11 accepted successively, rubs deslimer 12, continous way multistage pneumatic separation classification case 13 and rewinding storehouse 14.
Material-falling hopper 11 is bucket-shaped, and the charging aperture that correspondence is rubbed deslimer 12 is arranged on the top of rubbing deslimer 12.Aggregate is thrown in material-falling hopper 11 by other feed mechanisms, then enters and rubs in deslimer 12.
Rub deslimer 12 and can adopt following two kinds of embodiments.Wherein a kind of embodiment as shown in Figure 6 and Figure 7, is rubbed deslimer 12 and is comprised casing 121, emery wheel 122, clearance adjustment mechanism 123 and driving mechanism.
The bottom of casing 121 has discharging opening, and this discharging opening is communicated with the charging aperture 131g on upper selection by winnowing classification case 131a.Driving mechanism is arranged on outside casing 121, and the output shaft of driving mechanism stretches in casing 121 and the emery wheel 122 that is in transmission connection, and emery wheel 122 is arranged in casing 121 in revolvable mode.
The wheel face of emery wheel 122 is provided with main mill layer 122a, and on the internal box wall of casing 121, corresponding main mill layer 122a is provided with secondary mill layer 121a, and secondary mill layer 121a is bending and is around in outside main mill layer 122a.The surface of main mill layer 122a and secondary mill layer 121a is corresponding respectively protrudes the protruding mill portion that forms a plurality of small raised lump shapes, or the surface of the pair mill layer 121a of main mill layer 122a is respectively the protruding mill portion of fin shape one by one.Can the be one-body molded main mill layer of emery wheel 122 122a, or emery wheel 122 and a main mill layer 122a be split type, and a main mill layer 122a is set on the wheel face of emery wheel 122.When main mill layer 122a is when a secondary mill layer 121a rotates, rub, push aggregate together with main mill layer 122a and secondary protruding mill portion of grinding on layer 121a, the earth boning on aggregate surface is rubbed with the hands, can also rub scattered the aggregate being bonded together.As a preferred embodiment of the present invention, emery wheel 122 rotates towards enterprising air port 131c, aggregate after rubbing like this, push, milling is windward type discharging, and by the discharging opening 131h of casing 121 bottoms, the charging aperture 131g on upper selection by winnowing classification case 131a, enters in upper selection by winnowing classification case 131a successively.By improving the windward side of aggregate, can improve selection by winnowing classifying capability.
Clearance adjustment mechanism 123 comprises adjusting rod 124 and spring 125.One end portion of adjusting rod 124 is positioned at outside casing 121, after the sheathed spring 125 in this end, to point to the mode of emery wheel 122, stretches in casing 121 and supports on pair mill layer 121a.Main mill layer 122a and secondary mill layer 121a can adopt respectively high-abrasive material to make.According to the particle size of aggregate and clean level, screw out accordingly, precession adjusting rod 124, make the gap between main mill layer 122a and secondary mill layer 121a correspondingly become large, or the end that makes adjusting rod 124 promotes secondary mill layer 121a inwards near main mill layer 122a, to turn the gap between main mill layer 122a and secondary mill layer 121a down.By clearance adjustment mechanism 123, can improve and rub effect.
Another embodiment as shown in Figure 8, is rubbed deslimer 12 and is comprised casing 121, emery wheel 122 and driving mechanism.Emery wheel 122 is two, and two emery wheels 122 are arranged in casing 121 in the mode that can rotate and knead, and the output shaft of driving mechanism stretches in casing 121 and one of them emery wheel 122 that is in transmission connection.The wheel face of emery wheel 122 protrudes respectively and forms a plurality of protruding mill portion rub that aggregate uses, and this protruding mill portion as previously mentioned, both can be small raised lump shape and also can be fin shape, both can one-body moldedly also can form by separable assembled.
Continous way multistage pneumatic separation classification case 13 comprises casing 131, by dividing plate 132, the interior separation of casing 131 is become to upper selection by winnowing classification case 131a and lower selection by winnowing classification case 131b.One end portion of upper selection by winnowing classification case 131a and lower selection by winnowing classification case 131b respectively correspondence is provided with enterprising air port 131c and lower air inlet 131e, and the other end of upper selection by winnowing classification case 131a and lower selection by winnowing classification case 131b respectively correspondence is provided with air outlet 131d and lower air outlet 131f.Upper air outlet 131d and lower air outlet 131f are communicated with cyclonic filter equipment 30 by airduct respectively.
On the top tank wall of upper selection by winnowing classification case 131a, near enterprising air port 131c, have charging aperture 131g, the corresponding discharging opening of rubbing deslimer 12 that is communicated with of charging aperture 131g.On the under casing wall of lower selection by winnowing classification case 131b, along air intake direction, be laid with a plurality of discharging opening 131h, a plurality of discharging opening 131h place respectively correspondence arranges rewinding storehouse 14.Rewinding storehouse 14 can be according to the descending one-level rewinding storehouse 14a that is divided into of the particle diameter of aggregate, secondary rewinding storehouse 14b, three grades of rewinding storehouse 14c, level Four rewinding storehouse 14d, Pyatyi rewinding storehouse 14e etc.
On dividing plate 132, corresponding a plurality of discharging opening 131h are laid with a plurality of classification material mouth 132a, classification material mouth 132a place is provided with the check valve 132b opening towards lower selection by winnowing classification case 131b, avoid the blast in lower selection by winnowing classification case 131b may be greater than selection by winnowing classification case 131a, and form blowback, affect separating effect.Check valve 132b can realize the unidirectional function of opening under certain pressure-acting, and check valve 132b can adopt existing conventional structure, and its concrete structure and operation principle thereof are prior art, as known technology, does not repeat them here.Dividing plate 132 forms a plurality of funnelform upper collecting bin 131i towards the surface of the upper selection by winnowing classification case 131a taper that is protruding upward, and on each, the respectively corresponding classification material mouth 132a of collecting bin 131i arranges.
The air outlet of air blast 20 is communicated with lower air inlet 131e by airduct.
The equipment of two filtration use is set in the present invention, the one, cyclonic filter equipment 30, another is control of dust filter plant 40.Cyclonic filter equipment 30 is used for filtering compared with coarse granule level travel fatigue, and to alleviate the load of control of dust filter plant 40 below, control of dust filter plant 40 adopts sack cleaner structure, and the finally dedusting of this structure, mainly processes relatively fine particle level dust.
Cyclonic filter equipment 30 can adopt two kinds of conventional structures.A spiral shell shell mould cyclonic filter equipment, it utilizes the separated dust of centrifugal principle.Spiral shell shell mould cyclonic filter equipment mainly comprises Whirlwind barrel, is arranged on the flue-dust retainer of Whirlwind barrel bottom, and the spiral case (or collection blast cap) that is arranged on Whirlwind barrel top, sets out air port on spiral case.Another kind is common cyclone dust collectors, can be from air-flow separating solids and liquid particle, or from liquid separating solid particles.Common cyclone dust collectors mainly comprise cylinder, are arranged on the ash bucket of cylinder bottom, and the cone that is arranged on cylinder top.On cylinder, have air inlet, on cone, have air outlet.The air inlet of cyclonic filter equipment 30 is communicated with air outlet 131d and lower air outlet 131f by airduct respectively, and the air outlet of cyclonic filter equipment 30 is communicated with the air inlet of control of dust filter plant 40 by airduct.
The air port of letting out of control of dust filter plant 40 is communicated with the enterprising air port 131c of selection by winnowing classification case 131a by airduct; The air outlet of air blast 20 is communicated with the lower air inlet 131e of lower selection by winnowing classification case by airduct.Between enterprising air port 131c and charging aperture 131g, be provided with the adjusted plate 21 that regulates upper selection by winnowing classification case 131a air quantity and blast; Under lower selection by winnowing classification case, between air inlet 131e and classification material mouth 132a, be provided with the lower adjustable plate 22 that regulates lower selection by winnowing classification case 131b air quantity and blast.
Control of dust filter plant 40 can adopt conventional structure, and it mainly comprises filter box and is arranged on a plurality of filtration string bags in filter box or filters cloth bag.The air inlet that gas is offered from filter box bottom enters, and then enters and filters the string bag or filter cloth bag, by filtering the outlet of the string bag or filtration cloth bag, discharges outside filter box.By filtering the string bag, make gas obtain filtration, purification, can remove the impurity such as stone flour.The air outlet place of control of dust filter plant 40 also can arrange air-introduced machine, to improve pump drainage wind, the filter effect of control of dust filter plant 40.
Wherein, check valve 132b, cyclonic filter equipment 30 and control of dust filter plant 40 adopt respectively existing conventional structure, and its concrete structure and operation principle thereof are prior art, as known technology, do not repeat them here.
In order to narrate conveniently, pending aggregate before selection by winnowing classification is referred to as to combined aggregate, after a selection by winnowing classification, be referred to as rough segmentation aggregate, after the classification of secondary selection by winnowing, be referred to as to segment aggregate.
Shown in Fig. 9, a kind of concrete of the present invention is dried aggregate continuous multi-stage selection by winnowing stage division, realizes successively by following steps:
1, select combined aggregate, combined aggregate can select natural sand, natural stone, Machine-made Sand, machine-processed stone, metal or nonmetallic ore can utilize waste material, metal or nonmetal smelting or ore dressing factory can utilize waste material, thermal power plant's slag, can utilize renewable material of building waste etc. to mix a kind of in grain-size grade material, or any combination of close gravitational material wherein; Preferably select the dry aggregate that does not have bonding phenomenon between different-grain diameter aggregate, process prescreening or fragmentation, screening are processed, the selected pending aggregate with certain particle size range.
2, selected combined aggregate is entered and rubbed in deslimer 12 by material-falling hopper, rub 12 pairs of aggregates of deslimer and rub, kibble desilt, be conducive to lower one force one wind and select classification to process.
3, the combined aggregate of rubbing is heavy curtain shape and falls into the upper selection by winnowing classification case 131a in continous way multistage pneumatic separation classification case 13, drawing the cleaning of letting out air port from the control of dust filter plant 40 remaining air quantity that circulates continues to enter by airduct in upper selection by winnowing classification case 131a, under certain wind-force effect, first carry out the classification of first order selection by winnowing, remove in advance stone flour and the mud dirt in combined aggregate, carried secretly, and the upper collecting bin 131i of corresponding particle size range will be moved to compared with lightweight aggregate successively pusher, form rough segmentation aggregate, reach a certain amount of after, under the self gravitation effect of rough segmentation aggregate, check valve 132b opens automatically, rough segmentation aggregate falls in lower selection by winnowing classification case 131b.
When 4, air blast 20 continues the interior air-supply of downward selection by winnowing classification case 131b, to the further selection by winnowing classification of rough segmentation aggregate that continues to fall from classification material mouth 132a, the aggregate of corresponding proportion and particle size range falls in corresponding rewinding storehouse 14.
5, the gas of carrying earth, dust, stone flour in upper selection by winnowing classification case 131a and lower selection by winnowing classification case 131b secretly is corresponding respectively enters cyclonic filter equipment 30 and control of dust filter plant 40 successively by upper air outlet 131d and lower air outlet 131f, the remaining air quantity of cleaning is after filtering introduced into the enterprising air port 131c of upper selection by winnowing classification case from letting out after discharge in air port of control of dust filter plant 40, and realization recycles.
6, through final each grain-size grade segmentation aggregate processed of lower selection by winnowing classification case 131b, the content of its earth and stone flour is up to standard, fall into respectively behind corresponding rewinding storehouse 14, relying on aggregate self gravitation to fall into respectively the belt conveyor (figure omits) of dividing into, to be sent to the high-order aggregate bin storage of concrete mixing plant standby.
Below continuous multi-stage selection by winnowing principle of the present invention and process are described further.Continue air-supply drawing the cleaning of letting out air port from the control of dust filter plant 40 remaining air quantity selection by winnowing classification case 131a that makes progress that circulates, air-supply in the downward selection by winnowing classification case 131b of air blast 20 simultaneously, according to parameters such as the combined aggregate particle size of rubbing, proportion and dust content degree, by adjusted plate 21, lower adjustable plate 152, regulate the air output of introducing clean air circulation and air blast 20, to realize the adjusting to gas flow rate and flow, thereby realize comparatively desirable selection by winnowing grading effect.
The charging aperture 131g of combined aggregate after rubbing by long narrow passage is heavy curtain shape and enters upper selection by winnowing classification case 131a, and be in the wind and select in classification case 131a through the classification of first selection by winnowing, thereby the corresponding multiply rough segmentation aggregate that forms, the particle diameter of per share rough segmentation aggregate is concentrated along the descending distribution of wind direction, and the rough segmentation aggregate of setting particle size range falls into respectively in corresponding upper collecting bin 131i.
When the rough segmentation aggregate of each particle size range is gathered in upper collecting bin 131i, the check valve 132b of upper collecting bin 131i bottom opens successively under the Action of Gravity Field of rough segmentation aggregate, multiply rough segmentation aggregate is respectively heavy curtain shape and falls to entering in lower selection by winnowing classification case 131b, through the classification of second selection by winnowing, thereby the corresponding multiply segmentation aggregate that forms, the descending distribution of particle diameter of multiply segmentation aggregate concentrates correspondence to be divided into one-level aggregate, secondary aggregate, three grades of aggregates, level Four aggregate, Pyatyi aggregate, and correspondence falls into one-level rewinding storehouse 14a, secondary rewinding storehouse 14b, three grades of rewinding storehouse 14c, in level Four rewinding storehouse 14d and Pyatyi rewinding storehouse 14e.
The mist of carrying earth, dust, stone flour in upper selection by winnowing classification case 131a and lower selection by winnowing classification case 131b secretly is corresponding respectively enters cyclonic filter equipment 30 and control of dust filter plant 40 successively by upper air outlet 131d and lower air outlet 131f, after filtering, dust is discharged collection and treatment from whirlwind filter plant 30 and control of dust filter plant 40 bottoms, remaining air quantity is introduced the enterprising air port 131c of selection by winnowing classification case 131a from letting out air port by airduct, recycles.
Selection by winnowing classification principle of the present invention: be to have utilized Aerodynamics and newton's kinetic energy conservation theory, proportion is identical or close, the dried material that particle diameter is identical or close is subject under the effect of same gas motive force in same direction, kinetic energy is identical or close, the distance that is the stressed rear movement of dried material is identical or close, that is the dry aggregate of different-grain diameter is subject to identical thrust gas, mobile distance difference.When dried material is carried out to selection by winnowing classification, from control of dust filter plant 40, let out the remaining air quantity of circulation in air port, by airduct, continue to enter upper selection by winnowing classification case 131a, according to material characteristic and classification requirement, by 21 pairs of air quantity of adjusted plate and blast, regulate, meanwhile combined aggregate is from material-falling hopper 11 free-fallings, being subject to is in the wind to select in classification case 131a by quality size (namely particle size) after gas shock resequences, assemble, passive rough classification becomes the rough segmentation aggregate of identical or close proportion different-grain diameter level scope, rough segmentation aggregate is assembled and is dropped to corresponding classification material mouth 132a place from big to small, and by the long narrow strip passage of check valve 132b on corresponding classification material mouth 132a, be heavy curtain shape and enter lower selection by winnowing classification case 131b.
Equally, lower selection by winnowing classification case 131b sent into the gas of certain pressure and flow in advance by air blast 20, the flow of air-supply and flow velocity are according to material characteristic and classification requirement, by lower adjustable plate 152, regulate, meanwhile the check valve 132b long narrow strip passage of rough segmentation aggregate on different classification material mouth 132a is the free-falling of heavy curtain shape, be subject to by quality size (being particle size), in lower selection by winnowing classification case 131b, resequencing after gas shock, assemble, passive subfractionation becomes the segmentation aggregate of identical or close proportion different-grain diameter level scope, the descending one-level that is divided into of particle diameter of the aggregate after segmentation, secondary, three grades etc., and correspondence falls into one-level rewinding storehouse 14a, secondary rewinding storehouse 14b, three grades of rewinding storehouse 14c, level Four rewinding storehouse 14d and Pyatyi rewinding storehouse 14e etc.The corresponding aggregate that institute classification forms is: one-level divides in aggregate, secondary thickness to divide in aggregate, three grades of finer minute aggregates, level Four special fine minute aggregate of fine minute aggregate, Pyatyi etc. compared with thickness, and the Accurate Classification of having realized combined aggregate sorts.
The present invention is according to the manufacturing technique requirent of different industries, can be disposable by the granule materials of certain grain-size grade scope in dry identical or close proportion mixed material, under thrust gas effect, realize and assembling rapidly and classification, the material of same proportion, by sort a plurality of kinds that are classified as different-grain diameter scope by particle size, meets different requirements.Simultaneously, selection by winnowing stage division of the present invention is to complete in airtight upper selection by winnowing classification case 131a and lower selection by winnowing classification case 131b, man-made noise is polluted little, the final dust forming is from the bottom dust-exhausting port collection and treatment of cyclonic filter equipment 30 and control of dust filter plant 40, pure air after filtration is introduced selection by winnowing classification case by airduct and is recycled from letting out air port, realize energy-saving and emission-reduction, without dust production operation, be conducive to environmental protection.
The data that adopt the present invention to carry out selection by winnowing classification processing are: the treating capacity of 10 tons/hour, is divided into the aggregate of selecting 5 kinds of rank particle size range; And to the statistics that the vibratory sieve of same power motor configuration is implemented progressive operation be: the treating capacity of 8 tons/hour, can only sub-elect the aggregate of 3 kinds of particle diameter level ranges, classification obvious processing effect of the present invention.If implement the present invention on a large scale, will greatly improve whole work efficiency and the product quality of concrete production industry.Moreover, to promoting the classification of the dried material in other industrial circle, sort ability and there is equally realistic meaning.
Utilize traditional selection by winnowing stage division and utilize the aggregate size distribution statistics table of comparisons after selection by winnowing classification of the present invention
Embodiment bis-
As shown in Fig. 4 a, Fig. 4 b and Fig. 5, the main distinction of the present embodiment and embodiment mono-is to replace air blast 20 with air-introduced machine 45, and the suction opeing of air-introduced machine 45 is communicated with in the air port of letting out of control of dust filter plant 40 and is located, the lower air inlet 131e of lower selection by winnowing classification case 131b opens wide.Air-introduced machine 45 in the present embodiment can arrange separately, or utilizes the wind of quoting of setting up in control of dust filter plant 40.
The suction opeing of air-introduced machine 45 connects the air port of letting out of control of dust filter plant 40 in production line, and the air outlet of air-introduced machine connects enterprising air port 131c, by air-introduced machine, the filtered air pumping out from control of dust filter plant 40 is sent in selection by winnowing classification case 131a.By the swabbing action of air-introduced machine, make to form in lower selection by winnowing classification case 131b blast and the air quantity of same intensity.
The clean air that the present embodiment is discharged by the interior negative pressure filtration of induced draft blower withdraws control of dust filter plant 40, and send in selection by winnowing classification case 131a, for the classification of first selection by winnowing.Can form so a circulating aidr bells blast system, one can save energy the energy, reduce energy consumption, two can reduce discharge, reduce atmosphere pollution, finally reach the object of energy-conservation, low-carbon (LC), environmental protection.
And the present embodiment is by upper selection by winnowing classification case 131a and lower selection by winnowing classification case 131b, also can improve aggregate separated efficiency, makes the particle diameter of the aggregates at different levels after material particles classification more concentrated, and then improve selection by winnowing classifying capability.
Embodiment tri-
The main distinction of the present embodiment and embodiment mono-is, the air outlet of air blast 20 is communicated with enterprising air port 131c and lower air inlet 131e by airduct respectively.
Embodiment tetra-
Air blast 20 and air-introduced machine 45 are set in the present embodiment simultaneously, and the air outlet of air blast 20 is communicated with enterprising air port 131c by airduct, and the air outlet of air-introduced machine 45 is communicated with lower air inlet 131e by airduct.
Above-described embodiment and accompanying drawing non-limiting product form of the present invention and style, suitable variation or modification that any person of an ordinary skill in the technical field does it, all should be considered as not departing from patent category of the present invention.

Claims (10)

1. the dry aggregate continuous multi-stage selection by winnowing stage division of concrete, is characterized in that, realizes: combined aggregate is rendered in same enclosure space and carried out continuously multistage pneumatic separation classification, is divided into the separated aggregate in some grades of particle size range by following steps.
2. the dry aggregate continuous multi-stage selection by winnowing stage division of a kind of concrete as claimed in claim 1, is characterized in that, described combined aggregate carries out continuously multistage pneumatic separation classification in continous way multistage pneumatic separation classification case; Wherein, continous way multistage pneumatic separation classification case comprises casing, by dividing plate, the interior separation of casing is become to upper selection by winnowing classification case and lower selection by winnowing classification case, one end portion of upper selection by winnowing classification case and lower selection by winnowing classification case respectively correspondence is provided with enterprising air port and lower air inlet, and the other end of upper selection by winnowing classification case and lower selection by winnowing classification case respectively correspondence is provided with air outlet and lower air outlet; On the top tank wall of upper selection by winnowing classification case, near enterprising air port, have charging aperture, on the under casing wall of lower selection by winnowing classification case, along wind side, be laid with a plurality of discharging openings, on dividing plate, corresponding a plurality of discharging openings are laid with a plurality of classification material mouths, and classification material mouth place is provided with the check valve of opening towards lower selection by winnowing classification case.
3. the dry aggregate continuous multi-stage selection by winnowing stage division of a kind of concrete as claimed in claim 1, is characterized in that, described combined aggregate is rubbed before entering described continous way multistage pneumatic separation classification case.
4. a kind of concrete as claimed in claim 3 is dried aggregate continuous multi-stage selection by winnowing stage division, it is characterized in that, the described step of rubbing adopts and to rub deslimer and carry out, wherein, rub deslimer and comprise casing, emery wheel and driving mechanism, the driving mechanism emery wheel that is in transmission connection, emery wheel is arranged in casing in revolvable mode; The wheel face of emery wheel is provided with main mill layer, and on the internal box wall of casing, corresponding main mill layer is provided with secondary mill layer, a plurality of protruding mill portion that the outer surface of main mill layer and secondary mill layer protrudes respectively that formation rubs that aggregate uses.
5. a kind of concrete as claimed in claim 3 is dried aggregate continuous multi-stage selection by winnowing stage division, it is characterized in that, the described step of rubbing adopts and to rub deslimer and carry out, wherein, the described deslimer of rubbing comprises casing, emery wheel and driving mechanism, the driving mechanism emery wheel that is in transmission connection, emery wheel is two, two emery wheels are arranged in casing in the mode of the aggregate that can rotate and knead; The wheel face of emery wheel is provided with main mill layer, and the outer surface of main mill layer protrudes and forms a plurality of protruding mill portion of rubbing to grinding that aggregate uses.
6. the dry aggregate continuous multi-stage selection by winnowing stage division of a kind of concrete as claimed in claim 3, is characterized in that, described in rub in step, the described combined aggregate of rubbing enters in described upper selection by winnowing classification case and is windward type blanking.
7. the dry aggregate continuous multi-stage selection by winnowing stage division of a kind of concrete as claimed in claim 2, is characterized in that, by air blast, in described lower selection by winnowing classification case, blows, and carries out selection by winnowing classification.
8. the dry aggregate continuous multi-stage selection by winnowing stage division of a kind of concrete as claimed in claim 2, is characterized in that, the wind of discharging in described continous way multistage pneumatic separation classification case filters, and then sends in described upper selection by winnowing classification case and carry out selection by winnowing classification.
9. a kind of concrete as claimed in claim 2 is dried aggregate continuous multi-stage selection by winnowing stage division, it is characterized in that, described dividing plate is towards a plurality of funnelform upper collecting bins of the surface of described upper selection by winnowing classification case formation protruding upward, and on each, the corresponding described classification material mouth of collecting bin difference arranges.
10. the dry aggregate continuous multi-stage selection by winnowing stage division of a kind of concrete as claimed in claim 2, is characterized in that, the wind that described combined aggregate recycles in continous way multistage pneumatic separation classification case carries out multistage pneumatic separation classification.
CN201310456719.1A 2013-09-29 2013-09-29 A kind of concrete dry aggregate continuous multi-stage air classification method Expired - Fee Related CN103521445B (en)

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Publication number Priority date Publication date Assignee Title
CN109967351A (en) * 2019-03-12 2019-07-05 中科院广州能源所盱眙凹土研发中心 The device and method of clay selection by winnowing processing
CN110238059A (en) * 2019-07-06 2019-09-17 四川玉塑新材料科技有限公司 A kind of calcium carbonate powder multiclass classification stage division

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JP2002282790A (en) * 2001-03-26 2002-10-02 Kurimoto Ltd Crushed sand manufacturing device
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CN109967351A (en) * 2019-03-12 2019-07-05 中科院广州能源所盱眙凹土研发中心 The device and method of clay selection by winnowing processing
CN110238059A (en) * 2019-07-06 2019-09-17 四川玉塑新材料科技有限公司 A kind of calcium carbonate powder multiclass classification stage division

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