CN1067294C - Flotation underflow draining floating control method - Google Patents
Flotation underflow draining floating control method Download PDFInfo
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- CN1067294C CN1067294C CN98113569A CN98113569A CN1067294C CN 1067294 C CN1067294 C CN 1067294C CN 98113569 A CN98113569 A CN 98113569A CN 98113569 A CN98113569 A CN 98113569A CN 1067294 C CN1067294 C CN 1067294C
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- flotation
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Abstract
The present invention relates to a flotation underflow draining floating control method. A control port forming a fixing part is arranged on a control chamber of a flotation slot in a recirculation zone at the deep part of ore slurry or in a control box of a flotation column. A floating part composed of a heavy bob, a floating body, a connecting rod and a screw cap is arranged at the low part of an ore slurry still zone communicated with the recirculation zone. As the flotation underflow draining floating control method uses the flotation part for discharging minerals in the deep part and the control port in a special O shape, a moving mineral discharging port which can change with ore slurry flow capacity proportionally is formed between the flotation part and the control port. The stabilization of a flotation liquid surface is ensured and the problems of coarse particle accumulation and bottom flow blockage are solved. The present invention has the advantages of sensitive and reliable flow control, convenient use and energy saving, and is suitable for all kinds of flotation mills.
Description
The present invention relates to a kind of ore discharge amount that can control flotation cell or flotation column automatically, make turnover ore pulp balance in flotation cell or the flotation column, keep the high stability device of flotation liquid level.
The ore discharge method that the tradition flotation cell is adopted is the bypass damper method, its operation principle is: preceding, put an intermediate box between the back flotation cell, facing to the pipe that advances that is connecting pit under the middle tank wall of pit, facing to tank wall bottom in the middle of the preceding groove one sand setting hole is arranged, but the sand setting hole is provided with the plate of open and close.One adjustable for height gate is arranged on the sand setting hole, round retaining bubble plate,, when production is carried out,, cannot see outside the gate, can't regulate, so generally allow its " normally closed " because the sand setting hole is in the ore pulp depths in order to avoid foam enters intermediate box.Only in groove during the sand setting alluvial, shut again after opening " putting sand " temporarily.Under the strong agitation of flotation device, can float thing and arrive liquid level with bubble floating, scrape by the foam outlet of scraper plate from flotation cell, rising in " the narrow district " of remaining ore pulp between retaining bubble plate and gate, is overflowed by the gate upper edge, enters in the intermediate box, the pipe that advances by pit sucks in the flotation cell of back, ore pulp comes to this and flows through in a series of flotation cells, and progressively carries out flotation, drains as heavy mineral products thing at last.Enter the ore pulp of flotation stage, often little when big when unstable because of each operation before the flotation, low when high during liquid level, liquid level is too high, and foam " band slurry " is too many, influence product purity, liquid level is too low, and this foam of in time drawing together out can not in time be drawn together out, influences the rate of recovery, in different flotation stage, the flotation liquid level also there are different requirements." bypass damper method " is exactly that height by the manual adjustment gate changes liquid level, to satisfy the requirement to the flotation liquid level.
Thin at grinding particle size, mineral proportion is little, and under the also metastable situation of each operation, the bypass damper method can satisfy the requirement of production substantially before flotation, still, in other cases, has been not so just.Thick or mineral are when great when grinding particle size, entering thick in the flow of slurry that " narrow district " rises, heavy particle sinks to getting back in the flotation cell, it is low with respect to advancing the ore deposit concentration that becomes to make overflow, wherein the particle mean size of solids, proportion all diminish, ore pulp is then opposite in the groove, become dense, thick, heavy, and sand setting hole, intermediate box bottom is in normally off, can not in time discharge coarse sand, thereby thick in the generation trough, heavy particle accumulation phenomenon, along with cumulative rises, overflow thickens gradually, slightly, heavily, up to advance the ore deposit balance, the accumulation just stop.Therefore, in ordinary production, ore pulp all is the pulp density height that is in than actual motion in producing usually in the groove, than great, the state of coarse size, generally speaking, accumulation increases power consumption, wearing and tearing increases, and aeration quantity also reduces because of the ore pulp resistance increases, and the gas dispersion difficulty.When accumulation is serious, part or all of deep gouge phenomenon can take place, at this moment produce and just can not normally carry out.Wearing and tearing have been quickened in accumulation, worn out flotation machine impeller, and its stirring capacity of cover plate descends, and has quickened accumulation again, forms vicious circle.In addition, when each operation was undesired before the flotation, the mineral slurry flux fluctuation was very big, its concentration, granularity, the proportion fluctuation is also big, liquid level big rise and big fall in the groove, the mineral syrup liquid foam coverage adds the stirring that flotation device is strong, and liquid level is visual poor, long flow path, the manual adjustment gate usually is untimely, inaccurate, is difficult to stablize so produce.
With " underflow valve method " ore discharge, be that the valve on the manual adjustment underflow pipe is kept into and out of the ore pulp balance, in the flotation column to reach the purpose of stablizing liquid level.But because of the flotation column height is big, the underflow flow velocity is big, and the variation that valve is small can cause the variation that flow is very big, and manual adjustment is difficult to handle appropriately, even causes underflow to stop up, and this to stablize liquid level actual by manual adjustment underflow valve be impossible.This also is one of the reason that can not promote of domestic for many years flotation column.
Purpose of the present invention aims to provide a kind of underflow blockage problem that can solve big and heavy particle accumulation, flotation column in the flotation cell, the flotation underflow discharge control method of can control the ore discharge amount automatically, stablize the flotation pulp liquid level, solution being arranged thick difficult problem, can be saved energy and reduce the cost, reduce production costs.
The objective of the invention is to realize in the following manner, flotation underflow draining floating control method, used by the control mouth, the standing part that control chamber or control cabinet are formed, and mainly by bell weight, the floating part that buoyancy aid is formed, control mouthful (2) is positioned on the control chamber of the ore discharge channel flotation cell that is in turbulent region, ore pulp deep, or the position vertically upward in the control cabinet of flotation column, the control mouth, control chamber or case are formed standing part, covering bell weight (3) on the control mouth, tubular connecting rod (4) is connected on the bell weight in the centre bore of top, the interior sky of bell weight is communicated with atmosphere, buoyancy aid (6) is enclosed within on the connecting rod, the connecting rod epimere is a male-pipe, and cover is regulated nut (7), weight on it, connecting rod, buoyancy aid, nut is formed the floating part that is in the ore pulp zone of silence, on the certain altitude of top, connecting rod top baffle plate (8) is arranged.
A control mouthful outer surface divides three sections, and last hypomere is cylindrical, and the stage casing is conical 18.Wall top, stage casing is opened 1-4 and is stood upside down tri-angle-holedly 21, and tri-angle-holed upper base forms the upper wall nubbin to the translation of epimere wall, promptly leads tooth 20.
The tri-angle-holed formation flexible mineral ejection hole 22 that is communicated with of the gap between weight end opening and control mouthful tube wall and the following control mouthful wall of weight with the radius of circle r0 (cm) of flexible mineral ejection hole maximum area equivalence is:
r
0=1.7(aQ/H
0.5)
0.5(a＞1?) (1)
In the formula: design discharge (m in the Q flotation flowsheet
5/ h)
H flotation liquid level is to the height (cm) of control mouth
A flow amplification coefficient
The height h of delthyrium
0(cm) be:
h
0=2r
0 0.5 (2)
Tri-angle-holed upper base length overall b (cm) is:
B=c π r
0 1.5In (c＜1) (3) formula c tri-angle-holed in the maximum activity mineral ejection hole shared ratio, cut a radius of circle r (cm) in the control mouthful and be:
R=(1.05-1.1) r
0(4) the radius of circle R (cm) that cuts of tri-angle-holed sharp corner circular section down is:
R
2-(r+m)R-0.5(1-c)r
0 3=0 (5)
In the formula: m control mouthful epimere pipe thickness
In the weight empty size should guarantee to cover tri-angle-holed 21, and with conical 18 closely cooperate.
The inventive method is described with reference to the accompanying drawings.
Fig. 1 this method is in the application of flotation cell
Fig. 2 this method is in the application of flotation column
Fig. 3 controls the mouth structure facade view
Fig. 4 controls the mouth structure vertical view
Fig. 5 flexible mineral ejection hole forms schematic diagram
With reference to Fig. 1, when flotation cell is used this method, it is back wall at preceding flotation cell, or in the partition wall of forward and backward flotation cell, near flotation cell advances the ore deposit height strong mixing district, peace one control chamber 1 as ore discharge channel, control chamber lower part outlet be wall in groove or after stretching out, advance pipe by threeway 11 and pit and link to each other, another interface of threeway connects the straight-bar 10 of straight-through atmosphere.Control mouthfuls 2 vertically be connected in control chamber suitable for reading in.The standing part of being made up of control chamber, control mouth just is in the turbulent region, ore pulp deep.Be fixed with " Contraband " type washboard 5 on the flotation cell wall, the high foam outlet that surpasses flotation cell of washboard reaches on the bottom control mouthful top deeply.It surrounds the floating part of being made up of buoyancy aid 6, connecting rod 4 etc., makes floating part be positioned at the ore pulp zone of silence that the bottom is communicated with the turbulent region.
With reference to Fig. 2, when flotation column is used this method, be to connect a downward-sloping heavy in section underflow pipe 17 in the flotation column bottom, the underflow pipe lower end is communicated with control cabinet 1, in the logical tailings pond of 1 end of control cabinet peace one outlet vertically downward, pacify the logical tailings pond of a tailings pipe, be with valve on the tailings pipe, on plane, control cabinet top, pacify vertical tube 14 with the concentricity position of outlet, vertical tube communicates with top buoyancy aid chamber 15, buoyancy aid chamber and flotation column are suitable for reading with high, vertical tube, the indoor formation ore pulp of buoyancy aid zone of silence.In case by having near above at the bottom of the case one to be the annular spray pipe 12 at center with the outlet, its tube wall is opened equidistant little hole for water spraying downwards, clear water water inlet pipe 13 is arranged on the sparge pipe, peace is higher than the overflow pipe 16 of flotation column on the clear water water inlet pipe 13, ensure that there is the above water spray pressure of 1 meter water column at little hole for water spraying place, is connected with blow-off pipe 13 under the ring pipe.
Each arrow is expressed as follows among the figure: → flow of slurry to-→ foam trend-→ clear water flows to,
After producing startup, ore pulp enters in the flotation cell (or flotation column) continually, mineral syrup liquid rises, hold up buoyancy aid, make buoyancy aid along the connecting rod vertical lifting, till the nut that withstands small end, when liquid level continues to rise to the roomy part in buoyancy aid top, the weight that buoyancy equals whole " floating part ", at this moment " floating part " rises with amplitude with liquid level, the bell weight end opening of its lower end leaves the garden awl outer surface of control mouth thereupon, and form hole between this section tube wall, along with liquid level rises, hole is increasing, in flotation cell or post emersion the ore pulp behind the froth pulp be exactly thus the hole discharge, increase along with hole, discharge rate increases, until with the inlet balance, the flotation liquid level just settles out, when inlet diminishes, liquid level falls, and floating part falls, and hole diminishes, discharge rate also reduces, until advancing once more, output balance, liquid level settle out on new level again, and be preceding, the difference of twice liquid level in back claims this liquid fluctuating △ h that two kinds of flows form, this mineral ejection hole that changes simultaneously with mineral slurry flux variation area is called flexible mineral ejection hole, because liquid level is to the height constant substantially (liquid fluctuating △ h is very small with respect to the whole height of liquid level) of mineral ejection hole, so the flow rate of pulp at flexible mineral ejection hole place is constant, so the area of flexible mineral ejection hole is always with the proportional variation of mineral slurry flux; Mineral ejection hole area vanishing when entering the ore deposit and stop, ore pulp has not just been discharged, and bell weight is fallen again on the awl outer surface of garden, and mineral syrup liquid is fallen on the height low slightly when producing; Nut in the production on the rotating floating body can change the relative position of buoyancy aid on connecting rod, has also just changed the height of flotation liquid level, like this, the flotation liquid level can be transferred on needed any height.
The deep ore discharge has been created utmost point advantageous conditions for reducing the flotation liquid fluctuating, when the degree of depth is constant, improve the stability of liquid level, will improve the sensitiveness of changes in flow rate to liquid fluctuating, also just be equivalent to improve the sensitiveness of the area of flexible mineral ejection hole to the height change in hole, this is decided by " hole shape " of flexible mineral ejection hole.The flexible mineral ejection hole of this method is the area hole shape very responsive to height change, and it is strong to stablize the liquid level ability.When flow is very little, rectangular opening, the narrow looping pit in plane may form very thin seam, is unfavorable for that row is thick.The present invention adopts the del hole, and it communicates with the narrow looping pit of controlling between mouth with weight, has remedied narrow looping pit and has been unfavorable for arranging thick defective.
Open on the top of control mouthful stage casing tube wall in the del hole, and the upper base in hole overlaps with the taper seat upper base and forms the remaining tube wall of epimere to the upper tube wall translation, promptly leads tooth 20, has limited the scope of activities of bell weight at horizontal plane.The control mouthful shape of the mouth as one speaks parameter by formula requirement of 1-5 is selected, and wherein flow amplification coefficient value condition is as follows:
To Q≤50 meter
3/ hour little flow process, 2 get about 4
To Q=(50-300) rice
3/ hour in flow process a get about 3
To Q＞300 meter
3/ hour big flow process 2 is got about 2.
The value of tri-angle-holed accounting value C in the maximum activity mineral ejection hole is as follows:
In small-sized control mouth, 2/r
0 0.5〉=0.7 o'clock, C=0.7
In large-scale control mouth, 2/r
0 0.5＜0.7 o'clock, C=2/r
0 0.5
According to mineral slurry flux size change activity ore discharge area is floating part.The buoyancy aid 6 of floating part is-up big and down small axisymmetric body to slide freely up and down on connecting rod 4.Buoyancy aid can adopt the hollow-core construction that is communicated with atmosphere that materials such as engineering plastics make or the solid of interior filling foamed material, proportion＜＜1, and proportion is constant, do not change because of temperature or immersion, when requiring buoyancy aid in working order during design, mineral syrup liquid is cross section largest portion place at an upper portion thereof preferably.
Adorn one " Contraband " shape baffle plate 3 at washboard 5 tops with reference to Fig. 1, weight 3 end openings were higher slightly or contour than control mouthful 2 taper seat upper bases when the level of baffle plate should guarantee to mention connecting rod 4, deviate from from the control mouth to prevent weight, guarantee floating part can steadily hang cover on control mouthful on, closely stagger the heel mineral slurry flux variation, the area of synchronous change flexible mineral ejection hole is guaranteed liquid level stabilizing.
Fix a pointer 9 on connecting rod 4 tops, correct position is pacified a rule in its vicinity, so that directly observe the height h of the fluctuation △ h of liquid level and the mineral ejection hole that floats.
With reference to Fig. 2, underflow pipe level inclination＞30 °, interior sectional area should satisfy flow rate of pulp＜0.3 meter per second.
In flotation column, unsteady control is that the liquid level according to buoyancy aid chamber 15 carries out, and when having only buoyancy aid chamber 15 " to be communicated with fully " with flotation column, two liquid levels are identical, and the control of floating is just meaningful.Underflow pipe 17 cross sections are big more, and velocity in pipes is more little, more than two liquid levels just approaching more, the control effect is good more, flow velocity is during less than 0.3 meter per second, at this moment the two liquid level discrepancy in elevation can think that less than 1 centimetre buoyancy aid chamber 15 is communicated with fully with flotation column.At this moment, the control of floating just is equivalent to according to the control of floating of flotation column liquid level according to buoyancy aid chamber liquid level; Vertical tube 14 does not hinder the perpendicularity of connecting rod 4; close the tailings pipe when producing beginning; open Clean water valve; keep overflow pipe 16 overflows on the clear water water inlet pipe 13 continuous in the production,, guarantee " bottom turbulent flow " to guarantee the water spray pressure of annular spray pipe mouth; prevent to stop up; during parking, open residue ore pulp in the tailings valve emptying flotation column, prevent the deposition obstruction.
The present invention has realized flotation underflow discharging control automatically, its floating part control is sensitive, not disturbed by foeign element, precise control is errorless: the special degree of lip-rounding of deep ore discharge and control mouth greatly improves liquid level stabilizing, the fine problem that solves flotation liquid level stabilizing difficulty, help the steady production flow process, improve mineral processing index, solved the thick difficult problem of row simultaneously, " thick; the heavy particle accumulation " and the underflow clogging of flotation column in the flotation cell have been eliminated, not only stablized production procedure, wearing and tearing have also been reduced, reduce power consumption, reduced the production cost of floatation process, and because the solution of " row is thick difficult ", make floatation process can adapt to ore dressing than coarsegrain, thereby for the production capacity of raising equipment, improve production target, realize comprising in larger scope energy-saving and cost-reducing of ore grinding, reduce production costs and created good condition.
The present invention also has easy to use, and maintenance capacity is few, and is simple in structure, the bodily form is small and exquisite, and handling ease, can be suitable for the characteristics such as processing cost is low Large, medium and small all types of floatation process.
Claims (7)
1, flotation underflow draining floating control method, it is characterized in that having used by the control mouth, the standing part that control chamber or control cabinet are formed, and mainly by bell weight, the floating part that buoyancy aid is formed, control mouthful (2) is positioned on the control chamber of the ore discharge channel flotation cell that is in turbulent region, ore pulp deep, or the position vertically upward in the control cabinet of flotation column, covering bell weight (3) on the control mouth, tubular connecting rod (4) is connected on the bell weight in the centre bore of top, the interior sky of bell weight is communicated with atmosphere, buoyancy aid (6) is enclosed within on the connecting rod, the connecting rod epimere is a male-pipe, cover is regulated nut (7) on it, weight, connecting rod, buoyancy aid, nut is formed the floating part that is in the ore pulp zone of silence, on the certain altitude of top, connecting rod top baffle plate (8) is arranged
A control mouthful outer surface divides three sections, last hypomere is cylindrical, the stage casing is conical (18), 1-4 handstand tri-angle-holed (21) is opened on tube wall top, stage casing, the upper base in hole is upwards. the translation of section tube wall, form the remaining tube wall of epimere, and promptly lead tooth (20), the tri-angle-holed part formation flexible mineral ejection hole (22) of the following control mouthful wall of gap and weight between weight end opening and control mouthful with the radius of circle r0 (cm) of flexible mineral ejection hole maximum area equivalence is:
r
0=1.7(aQ/H
0.5)
0.5(a＞1)
In the formula: design discharge (m in the Q flotation flowsheet
3/ h)
H flotation liquid level is to the height (cm) of control mouth
The height h of a flow amplification coefficient delthyrium (21)
0(cm) be:
h
0=2r
0 0.5
Tri-angle-holed upper base length overall b (cm) is:
b=cπr
0 1.5 (c＜1)
C tri-angle-holed (21) shared ratio in the maximum activity mineral ejection hole in the formula,
The control mouthful interior radius of circle r (cm) that cuts is:
r=(1.05-1.1)r
0
The tri-angle-holed outer section radius of circle R (cm) of sharp corner circular section down is:
R
2-(r+m)R-0.5(1-c)?r
0 2=0
In the formula: m is control mouthful epimere pipe thickness (cm)
Empty size should guarantee to cover tri-angle-holed (21) in the weight, and closely cooperates with conical (18).
2, method according to claim 1, it is characterized in that in the partition wall of the back wall of flotation cell or forward and backward flotation cell, deeply all arrange ore deposit passage control chamber (1) in the turbulent region near the ore pulp that advances the height district, ore deposit, outlet connects the pipe that advances of pit backward below it by threeway (11) outside groove or in the groove, upwards is communicated with atmosphere.
3, method according to claim 4 is characterized in that fixing " Contraband " shape washboard (5) on cell wall, and floating part is surrounded, and the high foam outlet that surpasses flotation cell reaches on the control mouthful top deeply.
4, method according to claim 1 is characterized in that buoyancy aid is a up big and down small axisymmetric body, proportion constant weight,＜＜1.
5, method according to claim 4, it is characterized in that the flotation column bottom connects a downward-sloping heavy in section underflow pipe (17), the underflow pipe lower end is communicated with control cabinet (1), leads to the tailings pond at control cabinet (1) end peace one outlet vertically downward, pacify a tailings pipe, logical tailings pond.Be with valve on the tailings pipe, at control cabinet plane, top and the concentricity position of outlet peace large diameter vertical tube (14), vertical tube communicates with top buoyancy aid chamber (15), buoyancy aid chamber and flotation column are suitable for reading with high, vertical tube, the indoor formation ore pulp of buoyancy aid zone of silence, in the case by having more than at the bottom of the case one to be the annular spray pipe (12) at center with the outlet, clear water water inlet pipe (13) is arranged on the sparge pipe, clear water water inlet pipe (13) is gone up the overflow pipe (16) that peace is higher than flotation column, there is blow-off pipe (18) below, opens equidistant little hole for water spraying on the annular tube wall downwards.
6, method according to claim 7 is characterized in that underflow pipe (17) is ° downward-sloping with level inclination＞30, and bore should satisfy flow rate of pulp＜0.3 meter per second.
7, method according to claim 7 is characterized in that the downward little hole for water spraying pressure of ring pipe more than 1 meter water column, little hole for water spraying distance＜10cm at the bottom of the case.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98113569A CN1067294C (en) | 1998-05-25 | 1998-05-25 | Flotation underflow draining floating control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98113569A CN1067294C (en) | 1998-05-25 | 1998-05-25 | Flotation underflow draining floating control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1202396A CN1202396A (en) | 1998-12-23 |
| CN1067294C true CN1067294C (en) | 2001-06-20 |
Family
ID=5223285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98113569A Expired - Fee Related CN1067294C (en) | 1998-05-25 | 1998-05-25 | Flotation underflow draining floating control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1067294C (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110124872A (en) * | 2019-06-07 | 2019-08-16 | 烟台东方冶金设计研究院有限公司 | Flap arrangement in a kind of new type flotation machine slot |
| CN117599945B (en) * | 2024-01-18 | 2024-04-05 | 中国矿业大学(北京) | Method for recycling micro-fine cassiterite |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4378165A (en) * | 1980-12-30 | 1983-03-29 | General Signal Corporation | Draft tube apparatus |
| CN1122731A (en) * | 1995-07-07 | 1996-05-22 | 姜志伟 | Bubble floatation machine with separated stirring part and separation part |
-
1998
- 1998-05-25 CN CN98113569A patent/CN1067294C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4378165A (en) * | 1980-12-30 | 1983-03-29 | General Signal Corporation | Draft tube apparatus |
| CN1122731A (en) * | 1995-07-07 | 1996-05-22 | 姜志伟 | Bubble floatation machine with separated stirring part and separation part |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1202396A (en) | 1998-12-23 |
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