CN103056027B - Sub-prime is sieved - Google Patents
Sub-prime is sieved Download PDFInfo
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- CN103056027B CN103056027B CN201310010376.6A CN201310010376A CN103056027B CN 103056027 B CN103056027 B CN 103056027B CN 201310010376 A CN201310010376 A CN 201310010376A CN 103056027 B CN103056027 B CN 103056027B
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- chute
- rotating cylinder
- drum sieve
- sieve
- magnetic
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Abstract
The present invention relates to the removal of Ferromagnetic Impurities and the screening plant of material in material.Sub-prime is sieved, it is characterized in that it comprises magnetic system, rotating cylinder, drum sieve, chute, chute frame and support, rotating cylinder is made up of non-magnetic stainless steel material, rotating cylinder and drum sieve are the cylindrical tube of both ends open, and one end of rotating cylinder is fixed on the gape of grinding machine by flange, the other end of rotating cylinder is docked by flange with one end of drum sieve; Magnetic system is provided with outside rotating cylinder, magnetic system is fixed on support, the upper end of chute is positioned at rotating cylinder through after drum sieve, the lower end of chute is positioned at outside drum sieve, chute is supported fixing by chute frame, the upper end of chute is chute inlet, and the lower end of chute is trough outlet, the chute inlet of chute is provided with wash tub pipe, and the water outlet end of wash tub pipe points to the rotating cylinder inside upper part being provided with magnetic system.The present invention the broken steel ball ferromagnetic material removing in grinding machine ore discharge, and can carry out pre-classification to grinding machine ore discharge ore pulp, is separated in advance by coarse-grained material.
Description
Technical field
The invention belongs to field of mechanical technique, particularly the removal of Ferromagnetic Impurities and the screening plant of material in material.
Technical background
The industries such as mine, building materials, chemical industry, in broken material process, because the steel ball added in grinding machine is abraded or cracked in grinding process, often can produce broken ball phenomenon.Many broken balls flow out with ore pulp, circulate fragmentation, wearing and tearing in systems in which, only have pulverize could discharge with fine granular materials, these broken steel balls cause heavy wear to slime dam, sand pump, cyclone and connecting pipe in cyclic process, substantially reduce their service life, reduce the operating efficiency of grinding machine, add energy ezpenditure.For solving the problem, the method generally adopted at present is on belt conveyor, install permanent magnetism or electromagnetic cylinder and suspension type tramp iron separator.Because the bed of material is thicker, permanent-magnetic iron expeller is often because magnetic field intensity is on the low side, and broken ball is difficult to eliminate; Electromagnet effect is better, but excitatory and heat radiation need consume a large amount of water power, wastes energy.Correlative study shows, the classification efficiency of material is relevant to the uniformity of material particles, the partition size scope that hydrocyclone is suitable for is generally 0.3 ~ 0.01mm, large granular materials can reduce hydroclone classification effect in cyclone classification process, more fine grained is made to enter in hydrocyclone sand, entering grinding machine together with coarse granule causes overground, causes next step technic index to worsen.Return grinding machine again after the defective large granular materials that grinding machine is directly discharged enters cyclone classification and will consume more energy, also reduce the platform effect of hydrocyclone simultaneously, add the wearing and tearing of cyclone.But, still there is no a kind of Ferromagnetic Impurities that can effectively remove in material both at home and abroad at present, large granular materials can be separated the equipment returning in advance and regrind again.
Summary of the invention
The object of the present invention is to provide a kind of broken steel ball ferromagnetic material in grinding machine ore discharge can removing, and carry out pre-classification to grinding machine ore discharge ore pulp, break the wholegrain level hierarchy system of former flow process, the sub-prime separated in advance by coarse-grained material is sieved.
The object of the invention is to be achieved through the following technical solutions: sub-prime is sieved, it is characterized in that it comprises magnetic system, rotating cylinder, drum sieve, chute, chute frame and support, rotating cylinder is made up of non-magnetic stainless steel material, rotating cylinder and drum sieve are the cylindrical tube of both ends open, and one end of rotating cylinder is fixed on the gape of grinding machine by flange, and [rotating cylinder is fixed on the end cap of grinding machine (ball mill) gape, rotating cylinder rotates together with grinding machine], the other end of rotating cylinder is docked by flange with one end of drum sieve, and drum sieve, rotating cylinder rotate together with grinding machine; Magnetic system is provided with outside rotating cylinder, magnetic system is fixed on support, the upper end of chute is positioned at rotating cylinder through after drum sieve, the lower end of chute is positioned at outside drum sieve, chute is supported fixing by chute frame, the upper end of chute is chute inlet, and the lower end of chute is trough outlet, the chute inlet of chute is provided with wash tub pipe, and the water outlet end of wash tub pipe points to the rotating cylinder inside upper part being provided with magnetic system.
The inwall of rotating cylinder is provided with (be lined with, paste) high-abrasive material (as elastomeric material).
The screen-aperture of drum sieve is 2 millimeters.
The axis centering of drum sieve and grinding machine.
Drum sieve inwall is welded with helical structure.
Described magnetic is the circular arc of opening, and the radian of opening portion is 195 °, and the horizontal line of the upper extreme point of circular arc is lower than the horizontal line on rotating cylinder summit, and the horizontal line of the upper extreme point of circular arc and the horizontal line on rotating cylinder summit are at a distance of 105mm.
Magnetic system (1) is made up of magnetic pole group and yoke, and magnetic pole group adopts high performance neodymium iron boron and ferrite to be composited, and magnetic pole group is fixed in yoke, and yoke is made up of magnetic conduction steel.
Support is provided with mobile device.
Above-mentioned magnetic is a permanent magnetism compound magnetic system, magnetic architecture adopt AutoCAD, Ansys, Matlab, Pro E etc. calculate assistant software and carry out simulation optimization, and form in conjunction with actual measurement contrast design, assembled by 15 groups of magnetic patch, each group is all be composited by neodymium iron boron and ferrite magnetic material.
Above-mentioned drum sieve adopts the composite processings such as wear-resisting steel and rubber to form, compass screen surface there is the round sieve of quincunx distribution, for meeting the demand of different material, being designed with the drum sieve of different screen size, sieve aperture spacing increases with aperture and increases, and object is the firm performance ensureing sieve.
Above-mentioned support is provided with mobile device, for overhauling relevant device and safeguarding that the machine provides safety assurance.
Magnetic system transfixion during work, rotating cylinder rotates with grinding machine with drum sieve, and under the action of a magnetic force, rotating cylinder is the broken steel ball sucking-off in ore pulp and bring chute into, solve the broken steel ball of ferromagnetism in grinding machine ore discharge and remove problem, avoid the wearing and tearing to equipment in grinding classification system of broken steel ball.Ore pulp enters drum sieve and sieves, and the coarse granule in ore pulp is separated by drum sieve, directly turns back to grinding machine and regrinds, and decreases coarse granule internal circulating load in fine graded system, reduces energy ezpenditure.The lower fine of sieve enters cyclone and carries out fine graded, and the minimizing of coarse granule material content, is conducive to the grading effect improving fine graded system.The present invention due to running power carry out autogenous tumbling mill, magnetic system adopt permanent-magnet material, critical piece adopt high-abrasive material process, thus there is energy consumption low, long service life, have the advantages such as volume is little, lightweight, easy and simple to handle.
The invention has the beneficial effects as follows: the broken steel ball ferromagnetic material removing in grinding machine ore discharge, and pre-classification can be carried out to grinding machine ore discharge ore pulp, break the wholegrain level hierarchy system of former flow process, coarse-grained material is separated in advance.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the right view of Fig. 1.
Fig. 3 is the structural representation of magnetic system of the present invention.
Fig. 4 is the right view of Fig. 3.
Fig. 5 is the structural representation of drum sieve of the present invention.
Fig. 6 is the structural representation of rotating cylinder of the present invention.
Fig. 7 is the right view of Fig. 6.
Fig. 8 is the structural representation of chute device of the present invention.
Fig. 9 is the right view of Fig. 8.
Figure 10 is the structural representation of the grinding classification system of concrete test run sub-prime sieve of the present invention.
In figure: 1. magnetic system; 2. rotating cylinder; 3. drum sieve; 4. chute; 5. chute frame; 6. support; 7. trough outlet; 8. chute inlet; 9. helical structure; 10. sieve aperture; 11. grinding machines; 12. cyclones; 13. sand pumps; 14. slime dams; 15. sub-prime sieves.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described, see Fig. 1-10:
Sub-prime sieve (FZJ-I type), it comprises magnetic system 1, rotating cylinder 2, drum sieve 3, chute 4, chute frame 5, helical structure 9 and support 6, rotating cylinder 2 is made up of non-magnetic stainless steel material, wear and tear for preventing rotating cylinder 2, be provided with (be lined with, paste) high-abrasive material (as elastomeric material) at the inwall of rotating cylinder 2, high-abrasive material can be changed separately upon wear; Rotating cylinder 2 and drum sieve 3 are the cylindrical tube of both ends open, and one end of rotating cylinder 2 is fixed on the gape of grinding machine by flange, and [rotating cylinder is fixed on the end cap of grinding machine (ball mill) gape, rotating cylinder rotates together with grinding machine], rotating cylinder 2 operates together along with the rotation of grinding machine, the other end of rotating cylinder 2 is connected with one end of drum sieve 3 and (is docked by flange, by 16 screws tightens), the axis centering of drum sieve 3 and grinding machine, when avoiding rotating cylinder 2 to work, the cylinder end of drum sieve produces excessive circular runout; Be provided with the magnetic system 1(magnetic system producing high field intensity magnetic field outside rotating cylinder and do not affect rotating cylinder rotation), magnetic system 1 is fixed on support 6, magnetic system 1 is made up of magnetic pole group and yoke, magnetic pole group adopts high performance neodymium iron boron and ferrite to be composited, magnetic pole group is fixed in yoke by not magnetic stainless steel screw, and yoke is made up of magnetic conduction steel; Drum sieve 3 inwall is welded with helical structure 9, the upper end of chute 4 is positioned at rotating cylinder 2 through after drum sieve 3, the lower end of chute 4 is positioned at outside drum sieve 3, chute 4 supports fixing by chute frame 5, the upper end of chute 4 is chute inlet 8, and the lower end of chute 4 is trough outlet 7, and the chute inlet of chute 4 is provided with wash tub pipe (wash tub pipe is arranged on chute groove side), the water outlet end of wash tub pipe points to the rotating cylinder inside upper part being provided with magnetic system, broken ball surface ore particle can be rinsed well; Support is welded-steel plate construction part, matches affixed inside support with magnetic system yoke profile.
Described magnetic system 1 is the circular arc of opening, the radian of opening portion is 195 °, the horizontal line of the upper extreme point of circular arc is lower than the horizontal line on rotating cylinder 2 summit, the horizontal line of the upper extreme point of circular arc and the horizontal line on rotating cylinder 2 summit are at a distance of 105mm[as shown in Figure 1,3, when the broken steel ball adsorbed moves to (opening portion) beyond induced field region time, lose magnetic system sucking action].
The screen-aperture of drum sieve 3 is 2mm.
Above-mentioned support is provided with mobile device, for overhauling relevant device and safeguarding that the machine provides safety assurance.
Feature of the present invention is: 1, the broken steel ball of the automatic recovery and iron filings, reduces the wearing and tearing of next procedure equipment, reduces production system fault rate.2, break the convention of the full grade-classification of original grinding machine ore discharge, large granular materials is directly returned, economize energy, improve fine graded efficiency and treating capacity in the grinding classification system unit interval.3, power set carry out autogenous tumbling mill, and self does not require the expenditure of energy.4, the compound magnetic system of neodymium iron boron and ferrite two kinds of magnetic materials composition, the high and stable performance of magnetic field intensity, permanent-magnet material, can economize energy as magnetic source.5, be connected with screw by flange between parts, be convenient to dismounting, easy to maintenance.6, equipment surface adopts abrasion-resistant stee, stainless steel material, has the advantages such as antirust, anticorrosion and wear-resisting.
The detailed operation principle of this sub-prime sieve is as follows:
During work, the material after grinding machine ore grinding is discharged from the gape (discharge gate) of grinding machine, enters in rotating cylinder 2.Rotating cylinder 2 is fixedly connected with grinding machine gape, and together rotates.Rotating cylinder 2 inwall produces high strength induced field under the magneticaction of outer arcuate magnetic system.Broken steel ball in slurry is adsorbed on rotating cylinder 2 inwall under magneticaction, rotating cylinder 2 upwards rotates and is separated with slip by broken steel ball, top wash tub pipe rinses iron ball, the ore pulp that broken ball adheres to is rinsed well, when the broken steel ball adsorbed moves to beyond induced field region time, lose magnetic system sucking action, broken steel ball drop is to chute inlet 8, be rolled into trough outlet by chute, complete material and broken steel ball separation process.
Material enters after drum sieve 3 and rotates and flow forward with drum sieve 3 under the effect of flushing water and helical structure 9, constantly rolling in drum sieve 3, fine granular materials flows out through sieve aperture, coarse granule material is separated from the drum sieve other end, thus achieve the separation of thick fine particle stage material, adopt Pulp pump that the coarse fraction material of discharge is turned back to grinding machine and regrind.
Below in conjunction with specific embodiments and the drawings, the present invention is tested:
Choosing sieve aperture aperture is that the drum sieve of 2mm is at Jiangxi Province's scale state owned enterprise copper mine employing Φ 3200*4500 lattice type grinding machine, classification adopts the classifying grinding system trial run of Φ 660 cyclone composition, effectively eliminate broken steel ball on the one hand, avoid the harm that broken steel ball brings; Separated in advance by coarse granule in ball milling ore discharge on the other hand, turn back to grinding machine and regrind, sieving by sub-prime the coarse granule ore amount separated is 28.6t/h.
In former flow process, this part coarse granule ore squeezes into cyclone, flows per unit time with the concentration pump of 60wt%
Q
1=(28.6/(60/100)*40/100+28.6/2.7)/3600=0.008239m
3/s。
In new technological process, this part coarse granule ore directly squeezes into grinding machine, flows per unit time with the concentration of 60%
Q
2=(28.6/(60/100)*40/100+28.6/2.7)/3600=0.008239 m
3/s。
Energy consumption calculation:
In former flow process, ore pulp enters pipeline from pump pond after pump accelerates, and finally enters hydrocyclone with certain pressure, so pump lift H
pumpbecome by two parts:
1, pump is to the distance H of hydrocyclone import
1, be the 12000.0mm in 12m(and Figure 10 by accompanying drawing 10 this distance known);
2, the ore pulp height H that can reach under cyclone inlets place pressure condition
2;
Cyclone inlets pressure is one of major parameter of hydrocyclone, is generally 49 ~ 157kPa.The universal relation of inlet pressure and overflow granularity is in table 2.
Table 2 inlet pressure and overflow granularity universal relation table
| Overflow granularity d 95/min | 0.59 | 0.42 | 0.30 | 0.21 | 0.15 | 0.10 | 0.074 |
| Inlet pressure/kPa | 29.4 | 49 | 39～78 | 49～98 | 59～118 | 78～137 | 98～147 |
From flow process investigation report, being less than 0.30mm in hydrocyclone overflow is 95%, can be known by inference by table 2, and cyclone inlets pressure is 39 ~ 98kPa, therefore chooses 0.08MPa as basis, i.e. P
enter=0.8 × 10
5pa.
Can be obtained by formula P=ρ gh:
P
enter=ρ
1g H
2
Wherein g is acceleration of gravity, ρ
1for pulp density equals 2 × 10
3/ m
2, can calculate according to the proportion of pulp density 60 wt%, ore proportion and water in flow process investigation report.So,
H
2=4m
H
pump=H
1+ H
2=12 m+4 m=16 m
From accompanying drawing 10, in new technological process, with Pulp pump, coarse granule on sieve is directly turned back to feed port in grinding machine, the 6000.0mm in pump lift h=6 m(and Figure 10).
The rating formula of pump is N=9.8QHA/ (0.8*0.9)
Wherein, N-pump power, Kw
Q-flow, m
3/ s
A-density, t/ m
3
H-lift, m
The efficiency of 0.8-pump
0.9-electric efficiency
The upper coarse grained power N of process sieve in former flow process and new technological process can be calculated by the rating formula of pump
1, N
2.
N
1=9.8*16*(28.6/(60/100)*40/100+28.6/2.7)/3600/0.72=3.5884Kw
N
2=9.8*6*2*(28.6/(60/100)*40/100+28.6/2.7)/3600/0.72=1.3456 Kw
△ N= N
1-N
2= 2.2427 Kw
So saving electricity every day is
W=△ N*10
3* 3600*24/36000000=53.8 degree
The present invention of above-described embodiment major embodiment has following two advantages:
1) effectively eliminate the broken steel ball of discharging with ore pulp, avoid the parts such as broken worn steel ball hydrocyclone sand mouth;
2) coarse granule in ball milling ore discharge is separated in advance, return grinding machine and regrind, decrease the internal circulating load of coarse granule ore, saved the energy;
3) coarse granule is separated in advance to return and is regrinded, and enters ore size distribution in cyclone and comparatively rationally, optimizes grading technology condition, improve grading effect, decrease the fine grain internal circulating load at grinding system, can avoid overground, be conducive to saving energy.
Above-mentioned test is only one of embodiments of the invention, and non-sequential limits the scope of the invention, therefore: every equivalence change done according to structure of the present invention, shape, principle, all should be covered by within protection scope of the present invention.
Claims (7)
1. sub-prime sieve, it is characterized in that it comprises magnetic system (1), rotating cylinder (2), drum sieve (3), chute (4), chute frame (5) and support (6), rotating cylinder (2) is made up of non-magnetic stainless steel material, rotating cylinder (2) and drum sieve (3) are the cylindrical tube of both ends open, and one end of rotating cylinder (2) is fixed on the gape of grinding machine by flange, the other end of rotating cylinder (2) is docked by flange with one end of drum sieve (3); Magnetic system (1) is provided with outside rotating cylinder, magnetic system (1) is fixed on support (6), the upper end of chute (4) is positioned at rotating cylinder (2) through after drum sieve (3), the lower end of chute (4) is positioned at drum sieve (3) outward, chute (4) is supported fixing by chute frame (5), the upper end of chute (4) is chute inlet (8), the lower end of chute (4) is trough outlet (7), the chute inlet of chute (4) is provided with wash tub pipe, and the water outlet end of wash tub pipe points to the rotating cylinder inside upper part being provided with magnetic system;
Described magnetic is the circular arc of opening, and the radian of opening portion is 195 °, and the horizontal line of the upper extreme point of circular arc is lower than the horizontal line on rotating cylinder summit, and the horizontal line of the upper extreme point of circular arc and the horizontal line on rotating cylinder summit are at a distance of 105mm.
2. sub-prime sieve according to claim 1, is characterized in that: the inwall of rotating cylinder (2) is provided with high-abrasive material.
3. sub-prime sieve according to claim 1, is characterized in that: the screen-aperture of drum sieve (3) is 2 millimeters.
4. sub-prime sieve according to claim 1, is characterized in that: the axis centering of drum sieve (3) and grinding machine.
5. sub-prime sieve according to claim 1, is characterized in that: drum sieve inwall is welded with helical structure.
6. sub-prime sieve according to claim 1, it is characterized in that: magnetic system (1) is made up of magnetic pole group and yoke, magnetic pole group adopts high performance neodymium iron boron and ferrite to be composited, and magnetic pole group is fixed in yoke, and yoke is made up of magnetic conduction steel.
7. sub-prime sieve according to claim 1, is characterized in that: support is provided with mobile device.
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|---|---|---|---|
| CN201310010376.6A CN103056027B (en) | 2013-01-11 | 2013-01-11 | Sub-prime is sieved |
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|---|---|---|---|
| CN201310010376.6A CN103056027B (en) | 2013-01-11 | 2013-01-11 | Sub-prime is sieved |
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| CN103056027B true CN103056027B (en) | 2015-08-12 |
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| CN103301910B (en) * | 2013-06-04 | 2015-07-15 | 广西华锡集团股份有限公司 | Cylinder screen for prescreening ore pulp at discharging port of ball grinder and assembling process of cylinder screen |
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| CN114700263B (en) * | 2022-04-24 | 2024-02-09 | 山西君实种业科技有限公司 | Seed sieving mechanism is used to agricultural |
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| CN117101866B (en) * | 2023-10-23 | 2023-12-19 | 泸州聚购科技发展有限公司 | Barite microparticle screening silicon dioxide device and screening method thereof |
| CN117160643B (en) * | 2023-11-03 | 2024-01-05 | 临汾市鑫锐机械设备有限公司 | Integrated roller dry screening sand making machine |
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| US4190524A (en) * | 1974-07-19 | 1980-02-26 | English Clays Lovering Pochin & Co., Ltd. | Magnetic separators |
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