CN104148278A - Layered high-frequency fine vibrating screen - Google Patents
Layered high-frequency fine vibrating screen Download PDFInfo
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- CN104148278A CN104148278A CN201410389499.XA CN201410389499A CN104148278A CN 104148278 A CN104148278 A CN 104148278A CN 201410389499 A CN201410389499 A CN 201410389499A CN 104148278 A CN104148278 A CN 104148278A
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Abstract
The invention discloses a layered high-frequency fine vibrating screen. The layered high-frequency fine vibrating screen is composed of an ore pulp distribution system, a screening system and a discharging system. The ore pulp distribution system structurally comprises a first-level ore pulp tank (2), a second-level ore pulp tank (3) and hoppers (5), wherein the feed end of the first-level ore pulp tank (2) is connected with a multihole energy dissipation valve (1); an overflow port of the first-level ore pulp tank (2) is connected with the second-level ore pulp tank (3); the hoppers (5) are connected to the lower portion of the second-level ore pulp tank (3). The screening system is composed of a vibration excitation unit, a classifying unit and a supporting unit. The discharging system has the functions of collection and discharge of materials below the screen and collection and discharge of materials on the screen, wherein the materials below all layers of high-frequency screen assemblies (7) are connected with upper chutes (10) through short pipes; the upper chutes (10) are connected with a material-below-screen main outlet (20); the materials on all the layers of high-frequency screen assemblies (7) are connected with lower chutes (11); a subsidiary discharge port (21) is connected to the lower chutes (11). The layered high-frequency fine vibrating screen has the advantages of being uniform in ore pulp feeding, high in screening efficiency and processing capacity and capable of adapting to different working conditions.
Description
Technical field
The fine sieve subset that the present invention relates to a kind of fine particle stage material, particularly relates to a kind of stack high-frequency vibration undersize sieve.
Background technology
Current industrial fine particle stage material wet classification equipment mainly contains spiral classifier, hydrocyclone and high frequency vibrating fine screen, and the feature of above-mentioned classifying equipoment is as follows:
(1) spiral classifier: the normal and ball mill of spiral classifier supports the use, the tank lower end that tilts to install is ore pulp class settling district, spiral slowly runs, ore pulp is played to stirring action, above light fine grained is suspended to, flows to overflow limit Yan Chu and overflow, enter next process and process, coarse particles is deposited to bottom land, by helical feed, to discharge gate, as sand return, is discharged.
Spiral classifier feature: simple in structure, treating capacity is large, energy consumption is low.But equipment is heavy, floor space is large, rely on gravity to carry out fuzzy classification, classification efficiency is very low, causes ball mill returning charge many, affects the prouctiveness of ball mill, can cause partial material to cross pulverizing simultaneously, affect the rate of recovery of valuable mineral, at present new design object is used the situation of spiral classifier fewer and feweri, is replaced gradually by hydrocyclone and high frequency fine screen.
(2) hydrocyclone: hydrocyclone is the effect that relies on centrifugal force, makes material carry out greatly less separation in cyclone inside by particle, coarse granule is got rid of from bottom spigot, and fine grained is discharged from overflow pipe.
Hydrocyclone feature: hydrocyclone is a kind of effective classification, desliming device, due to its simple structure, is convenient to manufacture, and treating capacity is large, is at home and abroad widely used.Its major defect is that consumption of power is larger, and in high pressure serious wear during to ore deposit.In addition, when classification for closed circuit grinding, because of its volume little, ore deposit amount fluctuation is not had to buffer capacity, and not as mechanical classifier working stability, the time that ore pulp stops in cyclone seldom, classification efficiency and precision are not high, classification efficiency probably only has 40～50%, and a lot of qualified fineves did not cause pulverizing because having classification effectively to repeat to enter ball milling, reduced the rate of recovery of valuable metal.Also can reduce the operating efficiency of ball mill simultaneously.
(3) existing high frequency fine screen
High frequency fine screen is a kind of fine graded equipment, can select screen mesh size according to the requirement of qualified grade, can be designed to individual layer high frequency fine screen or Multi-layer high-frequency fine sieve.
Main feature: screening efficiency is high, effectiveness of classification is high; Can multi-channel parallel, take up room little, it is in parallel that maximum can realize five tunnels.Screen frame adopts GF to support, and noise is low, and power consumption is little, and equipment dynamic load is little, therefore to basis being installed without specific (special) requirements.Force ore pulp to distribute to ore deposit, can make ore pulp uniform spreading in compass screen surface, reduce compass screen surface ore pulp flowing velocity, extend screen life-span.According to the number of milling capacity, can select to adopt single-deck screen or multi-deck screen.
Foot point is not: because of slag stock pump, squeezing into pulp tank has very strong turbulent flow, and mineral slurry level is also out-of-level, forces pulp distributer can not really realize ore pulp uniform distribution, thereby causes ore pulp unreasonable distribution, can not give full play to the disposal ability of high-frequency screen compass screen surface; Double-cylinder type vibrator can not be adjusted amplitude and frequency easily, thereby can not adjust easily disposal ability and the screening efficiency of ore pulp, and import barrel type vibration exciter is expensive, and domestic quality does not pass a test; Although current high frequency fine screen has pulping function again, poor effect, only depends on a transition settling section to add the flushing water effect of sizing mixing undesirable, affects the screening effect of second segment compass screen surface; Per area per time disposal ability is not high.
Summary of the invention
The equilibrium that technical problem to be solved by this invention is to provide a kind of ore pulp to ore deposit, screening usefulness is high, disposal ability is high and can adapt to the stack high-frequency vibration undersize sieve of different operating modes.
In order to solve the problems of the technologies described above, stack high-frequency vibration undersize sieve provided by the invention, by ore pulp distribution system, screening system and discharge system form, the structure of described ore pulp distribution system is: the feed end of one-level pulp tank is connected with porous energy dissipating valve, described porous energy dissipating valve carries out energy dissipating to the ore pulp of making from pump pond, the overfall of described one-level pulp tank is connected with secondary slurry storage tank, in the evenly perforate in the form of a ring of the bottom of described secondary slurry storage tank, the quantity of perforate equates with the number of plies of the high-frequency screen assembly of described screening system, each perforate is connected with a hopper, described screening system is comprised of exciting unit, stage unit and support unit, and described stage unit is 3～5 layers of high-frequency screen assembly, and the high-frequency screen assembly described in each is connected with the hopper described in, the structure of described support unit is: the described high-frequency screen assembly of many groups is connected to high-frequency screen bracing frame by rubber spring, and described high-frequency screen bracing frame supports to base surface, is provided with described exciting unit on described high-frequency screen bracing frame, described discharge system comprises gathering materials and discharging of gathering materials of minus mesh and discharging and oversize, and the minus mesh of the high-frequency screen assembly described in each layer is connected with top chute through short tube, and described top chute is connected with minus mesh general export, the oversize of the high-frequency screen assembly described in each layer is connected with bottom chute, and described bottom chute is connected with from discharge gate.
The structure of the high-frequency screen assembly described in each is: the end of the first screen cloth segment distance that falls is connected with blind plate section, and the described blind plate section segment distance that falls is connected with the second screen cloth.
The end whereabouts 15mm～30mm of the first described screen cloth is connected with the wide described blind plate section of 80mm～120mm, and described blind plate section whereabouts 15mm～30mm is connected with the second described screen cloth.
Described exciting unit is double-eccentric shaft vibrator.
The structure of described double-eccentric shaft vibrator is: motor is connected with main vibrating shaft by shaft coupling, and described main vibrating shaft has secondary vibrating shaft by gear drive, and described main vibrating shaft and the two ends of secondary vibrating shaft are all furnished with eccentric block.
The structure of described double-eccentric shaft vibrator is: 2 motors are connected with two eccentric shafts respectively, and the two ends of eccentric shaft are all furnished with eccentric block.
Adopt the stack high-frequency vibration undersize sieve of technique scheme, (1) for ore pulp distributed uniform, adopt upper and lower secondary ore pulp distributing trough, higher level's pulp tank enters notch at pulp-inlet pipe porous ore pulp energy dissipating valve is set, the ore pulp energy dissipating that pump is beaten, ore pulp quick and stable is got off, prevent that ore pulp from having large fluctuating; The overflow gravity flow of higher level's settling tank enters secondary slurry storage tank, in the bottom of slurry storage tank, is evenly arranged out in the form of a ring slotted eye, go out slotted eye number be decided by the ore pulp way that will distribute, i.e. the screen cloth number of plies, from two-way to tens tunnels not etc.
(2) adopt double-eccentric shaft vibrator, when increasing eccentric shaft eccentric distance, at eccentric shaft two ends, increase in addition eccentric balance weight structure, so both can improve exciting force, the amplitude of conveniently adjusted screen(ing) machine and stroke angle again, thus the disposal ability of screen(ing) machine improved.In double-eccentric shaft vibrator, eccentric shaft and motor have two kinds of connected modes, and a kind of connected mode is to adopt 14 grades or 2 grades of motors, by shaft coupling, is connected to main vibrating shaft, and main vibrating shaft arrives secondary vibrating shaft by gear drive, thereby realizes Biaxial synchronous.Another kind of connected mode is that 24 grades of employings or 2 grades of motors are connected with two eccentric shafts respectively, and power supply, from 2 motors of terminal box access in parallel, is realized synchronous because frequency is identical.Motor can be adjusted within the specific limits by the frequency of vibrator after frequency converter frequency conversion;
(3) because every layer of high-frequency screen assembly is all that two screen clothes are spliced, at first compass screen surface end decline 15～30mm, the blind plate section of 100mm left and right is set, overhead in blind plate section arranges high-pressure water nozzle, at the blind plate section end 15～30mm that declines again, connect second screen cloth, so just allow ore pulp at first screen cloth end self-assembling formation slip waterfall, under the flushing of HP shower, in blind plate section, fully mix, from blind plate section, drop into second screen cloth again and again form new slip waterfall, ore pulp is equivalent to through twice effect of sizing mixing, ore pulp just can fully mix like this, thereby improve disposal ability and the screening efficiency of second screen cloth,
Effect of the present invention is as follows:
(1) because adopting secondary ore pulp to distribute, however ore pulp distribute from evenly, unlike one-level, force ore pulp to distribute like that because being subject to the impact of ore pulp kinetic energy and impact distribution that ore pulp amount fluctuates unbalanced; Adopt nature ore pulp apportion design and optional minute ore deposit method really realizes the equilibrium of ore pulp to ore deposit, make full use of the effective sifting area of high-frequency screen, improve the disposal ability of sieve;
(2) because adopting double-eccentric shaft vibrator, screen(ing) machine exciting force is large, and the common high-frequency screen of amplitude ratio is large, thereby the disposal ability of high frequency fine screen is large, and screening efficiency is high, and amplitude, frequency, stroke etc. are easy to adjust.Adopt the double-eccentric shaft vibrator of brand-new design, thus attached with frequency converters realize amplitude and the frequency of high-frequency screen and can freely adjust, thereby give full play to the usefulness of high-frequency screen, improve the disposal ability of high frequency fine screen, promote the ability that high-frequency screen adapts to different operating modes;
(3) because adopting two-stage gravity flow waterfall to size mixing, two sections of ore pulp mixing are more even, thereby improve disposal ability and the screening efficiency of second screen cloth; Realize high-frequency screen secondary pulping truly, improve disposal ability and the screening efficiency of two sections of compass screen surfaces; Thereby improve the disposal ability of high-frequency screen complete machine.
In sum, the present invention be a kind of equilibrium of ore pulp to ore deposit, screening usefulness is high, disposal ability is high and can adapt to the stack high-frequency vibration undersize sieve of different operating modes.
Accompanying drawing explanation
Fig. 1 is stack high-frequency vibration undersize sieve complete machine schematic diagram.
Fig. 2 is ore pulp energy dissipating and distributes schematic diagram.
Fig. 3 is double-shaft vibration exciter schematic diagram.
Fig. 4 is that slip reproduces slurry schematic diagram.
Fig. 5 is that slip reproduces slurry schematic top plan view.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
Stack high-frequency vibration undersize sieve, by ore pulp distribution system, screening system and discharge system, formed, referring to Fig. 2, the structure of ore pulp distribution system is: the feed end of one-level pulp tank 2 is connected with porous energy dissipating valve 1,1 pair of ore pulp of making from pump pond of porous energy dissipating valve carries out energy dissipating, the overfall of one-level pulp tank 2 is connected with secondary slurry storage tank 3, in the evenly perforate in the form of a ring of the bottom of secondary slurry storage tank 3, the quantity of perforate equates with the number of plies of the high-frequency screen assembly 7 of screening system, and each perforate is connected with a hopper 5; Referring to Fig. 1, Fig. 3, Fig. 4 and Fig. 5, screening system is comprised of exciting unit, stage unit and support unit, and stage unit is 3～5 layers of high-frequency screen assembly 7, and each high-frequency screen assembly 7 is connected with a hopper 5; The structure of support unit is: organize high-frequency screen assembly 7 more and be connected to high-frequency screen bracing frame 6 by rubber spring, high-frequency screen bracing frame 6 supports to base surface, is provided with exciting unit on high-frequency screen bracing frame 6; Discharge system comprises gathering materials and discharging of gathering materials of minus mesh and discharging and oversize, and the minus mesh of each layer of high-frequency screen assembly 7 is connected with top chute 10 through short tube, and top chute 10 is connected with minus mesh general export 20; The oversize of each layer of high-frequency screen assembly 7 is connected with bottom chute 11, and described bottom chute 11 is connected with from discharge gate 21.
Particularly, referring to Fig. 4 and Fig. 5, the structure of each high-frequency screen assembly 7 is: the end of the first screen cloth 17 segment distance that falls is connected with blind plate section 18, and blind plate section 18 segment distances that fall are connected with the second screen cloth 19.
Preferably, referring to Fig. 4 and Fig. 5, the end of the first screen cloth 17 whereabouts (a) 15mm～30mm is connected with the wide blind plate section 18 of (b) 80mm～120mm, and blind plate section 18 whereabouts (c) 15mm～30mm are connected with the second described screen cloth 19.
Preferably, exciting unit is double-eccentric shaft vibrator 8.
Particularly, the structure of double-eccentric shaft vibrator 8 is: motor 9 is connected with main vibrating shaft 13 by shaft coupling 12, and described main vibrating shaft 13 has secondary vibrating shaft 15 by gear 14 transmissions, and described main vibrating shaft 13 and the two ends of secondary vibrating shaft 15 are all furnished with eccentric block 16.
Particularly, the structure of double-eccentric shaft vibrator 8 is: 2 motors are connected with two eccentric shafts respectively, and the two ends of eccentric shaft are all furnished with eccentric block.
As shown in Figure 2, the ore pulp of making from pump pond is stored in one-level pulp tank 2 to ore pulp distribution system after 1 energy dissipating of porous energy dissipating valve, and overflow enters secondary slurry storage tank 3, the evenly perforate in the form of a ring in slurry storage tank 3 bottoms, and number of aperture is determined according to the high-frequency screen number of plies.Screening system is comprised of exciting unit, stage unit and support unit.The exciting unit of this screen(ing) machine is double-eccentric shaft vibrator 8, as shown in Figure 3, motor 9 is connected to main vibrating shaft 13 by shaft coupling 12, main vibrating shaft 13 is transferred to secondary vibrating shaft 15 by gear 14, two ends at major-minor vibrating shaft are all furnished with eccentric block 16, the convenient screen(ing) machine amplitude of adjusting, so just can realize Biaxial synchronous.Stage unit is 5 layers of dusting cover frame (according to configurable 3 layers or 4 layers of the numbers of material handling), at stage unit, there is the more crucial sizing process that reproduces, as shown in Figure 4 and Figure 5, slip gravity flow enters the first screen cloth 17, blind plate section 18 at the end whereabouts of the first screen cloth 17 15mm～30mm to 80mm～120mm, 15mm～30mm to the second screen cloth 19 that fall again, slip falls behind and is fully mixed evenly under twice waterfall type, thereby improves disposal ability and the screening efficiency of second screen cloth.High-frequency screen assembly 7 is connected to high-frequency screen bracing frame 6 by rubber spring, and high-frequency screen bracing frame 6 supports to base surface again.Discharge system comprises gathering materials and discharging of gathering materials of minus mesh and discharging and oversize.The minus mesh of each layer of high-frequency screen assembly 7 is concentrated and is flow to top chute 10 after short tube, after gathering, from minus mesh general export 20, discharges.The oversize unification of each layer of high-frequency screen assembly 7 flows to bottom chute 11, after all oversizes gather, from discharge gate 21, discharges.
Innovation of the present invention: the double-eccentric shaft vibrator 8 of the lamination high frequency fine screen of original creation, double-eccentric shaft vibrator 8 has two kinds of kinds of drive, a kind of is to have 2 motors to drive respectively 2 eccentric shaft synchronous backward rotations, another kind of mode is by shaft coupling, to be connected to main vibrating shaft by 1 motor, main vibrating shaft arrives secondary vibrating shaft by gear drive, utilize gear drive to realize major-minor eccentric shaft synchronous, when increasing eccentric shaft eccentric distance, in the design of eccentric shaft two ends, can increase and decrease arbitrarily the structure of eccentricity balance-weight block, thereby can adjust easily stroke and the stroke angle of high-frequency screen.Adopt secondary ore pulp to distribute, ore pulp distributes nature and evenly, unlike one-level, forces ore pulp to distribute like that because being subject to the impact of ore pulp kinetic energy and impact that ore pulp amount fluctuates to distribute unbalanced.Adopt two-stage gravity flow waterfall to reproduce slurry technology, slip is fully mixed evenly after twice waterfall type sized mixing, thereby improves disposal ability and the screening efficiency of second screen cloth, and correspondingly the disposal ability of whole high-frequency screen and screening efficiency are all improved.
Claims (6)
1. a stack high-frequency vibration undersize sieve, it is characterized in that: by ore pulp distribution system, screening system and discharge system form, the structure of described ore pulp distribution system is: the feed end of one-level pulp tank (2) is connected with porous energy dissipating valve (1), described porous energy dissipating valve (1) carries out energy dissipating to the ore pulp of making from pump pond, the overfall of described one-level pulp tank (2) is connected with secondary slurry storage tank (3), in the evenly perforate in the form of a ring of the bottom of described secondary slurry storage tank (3), the quantity of perforate equates with the number of plies of the high-frequency screen assembly (7) of described screening system, each perforate is connected with a hopper (5), described screening system is comprised of exciting unit, stage unit and support unit, and described stage unit is 3～5 layers of high-frequency screen assembly (7), and the high-frequency screen assembly (7) described in each is connected with the hopper (5) described in, the structure of described support unit is: the described high-frequency screen assembly (7) of many groups is connected to high-frequency screen bracing frame (6) by rubber spring, described high-frequency screen bracing frame (6) supports to base surface, is provided with described exciting unit on described high-frequency screen bracing frame (6), described discharge system comprises gathering materials and discharging of gathering materials of minus mesh and discharging and oversize, the minus mesh of the high-frequency screen assembly (7) described in each layer is connected with top chute (10) through short tube, and described top chute (10) is connected with minus mesh general export (20), the oversize of the high-frequency screen assembly (7) described in each layer is connected with bottom chute (11), and described bottom chute (11) is connected with from discharge gate (21).
2. stack high-frequency vibration undersize sieve according to claim 1, it is characterized in that: the structure of the high-frequency screen assembly (7) described in each is: the end of the first screen cloth (17) segment distance that falls is connected with blind plate section (18), described blind plate section (18) segment distance that falls is connected with the second screen cloth (19).
3. stack high-frequency vibration undersize sieve according to claim 2, it is characterized in that: the end whereabouts 15mm～30mm of described the first screen cloth (17) is connected with the wide described blind plate section (18) of 80mm～120mm, described blind plate section (18) whereabouts 15mm～30mm is connected with described the second screen cloth (19).
4. according to the stack high-frequency vibration undersize sieve described in claim 1,2 or 3, it is characterized in that: described exciting unit is double-eccentric shaft vibrator (8).
5. stack high-frequency vibration undersize sieve according to claim 4, it is characterized in that: the structure of described double-eccentric shaft vibrator (8) is: motor (9) is connected with main vibrating shaft (13) by shaft coupling (12), described main vibrating shaft (13) has secondary vibrating shaft (15) by gear (14) transmission, and described main vibrating shaft (13) and the two ends of secondary vibrating shaft (15) are all furnished with eccentric block (16).
6. stack high-frequency vibration undersize sieve according to claim 4, is characterized in that: the structure of described double-eccentric shaft vibrator (8) is: 2 motors are connected with two eccentric shafts respectively, and the two ends of eccentric shaft are all furnished with eccentric block.
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| CN201410389499.XA CN104148278A (en) | 2014-08-08 | 2014-08-08 | Layered high-frequency fine vibrating screen |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106824768A (en) * | 2017-03-17 | 2017-06-13 | 严海兵 | A kind of lamination high frequency fine screen |
| CN108480202A (en) * | 2018-04-13 | 2018-09-04 | 中国矿业大学 | A kind of modularization self-balancing exciter for vibration screen and excitation system |
| CN110072637A (en) * | 2016-10-14 | 2019-07-30 | 德里克公司 | The device, method and system of vibration screening |
| CN110586470A (en) * | 2019-10-22 | 2019-12-20 | 唐山陆凯科技有限公司 | Laminated high-frequency fine screen |
| CN112642702A (en) * | 2021-01-05 | 2021-04-13 | 中国矿业大学 | High-efficient double-deck multistage shale shaker |
| US11654380B2 (en) | 2016-10-14 | 2023-05-23 | Derrick Corporation | Apparatuses, methods, and systems for vibratory screening |
| US11731167B2 (en) | 2016-10-14 | 2023-08-22 | Derrick Corporation | Apparatuses, methods, and systems for vibratory screening |
| US11806755B2 (en) | 2016-10-14 | 2023-11-07 | Derrick Corporation | Apparatuses, methods, and systems for vibratory screening |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110072637A (en) * | 2016-10-14 | 2019-07-30 | 德里克公司 | The device, method and system of vibration screening |
| US11654380B2 (en) | 2016-10-14 | 2023-05-23 | Derrick Corporation | Apparatuses, methods, and systems for vibratory screening |
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| US11779959B2 (en) | 2016-10-14 | 2023-10-10 | Derrick Corporation | Apparatuses, methods, and systems for vibratory screening |
| US11806755B2 (en) | 2016-10-14 | 2023-11-07 | Derrick Corporation | Apparatuses, methods, and systems for vibratory screening |
| US11883849B2 (en) | 2016-10-14 | 2024-01-30 | Derrick Corporation | Apparatuses, methods, and systems for vibratory screening |
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| CN110586470A (en) * | 2019-10-22 | 2019-12-20 | 唐山陆凯科技有限公司 | Laminated high-frequency fine screen |
| CN112642702A (en) * | 2021-01-05 | 2021-04-13 | 中国矿业大学 | High-efficient double-deck multistage shale shaker |
| CN112642702B (en) * | 2021-01-05 | 2021-09-24 | 中国矿业大学 | High-efficient double-deck multistage shale shaker |
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Application publication date: 20141119 |