CN109731696A - A kind of static flotation method suitable for coarse granule recycling - Google Patents
A kind of static flotation method suitable for coarse granule recycling Download PDFInfo
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Abstract
The present invention relates to a kind of static flotation methods suitable for coarse granule recycling, belong to mineral floating technical field, solve the problems, such as that existing method for floating processing capacity is small, separating effect is poor and be not able to satisfy coarse granule drying slime requirement.The static flotation method, includes the following steps: step 1: filling clear water into the second cylinder by water injection pipe, the clear water of 1/5~1/3 volume is injected into the first cylinder；Step 2: opening circulating pump and bubble generator, the intracorporal clear water of the second column are spilled over in the first cylinder, and microvesicle is generated in the second cylinder；Step 3: after the velocity-stabilization that the intracorporal clear water of the second column is overflowed into the first cylinder, the coal slime material of preparatory mineralising is fed into feed distributor, carries out flotation, wherein flotation concentrate is recycled by discharge nozzle, and tail coal is discharged through underflow pipe/outlet.Method for floating of the invention is easy to operate, good separation effect, can be widely applied for coarse granule drying slime.
Description
Technical field
The present invention relates to mineral floating technical field more particularly to a kind of static flotation methods suitable for coarse granule recycling.
Background technique
Coal is one of main energy pillar in China, and resourceful, reserves are big.Untreated coal storage and transportation, plus
Work, the process utilized can bring pollution to environment, endanger human health.The continuous of National Sustainable Development Strategies is implemented, coal
Clean utilization also become the focus that everybody constantly discusses warmly.In recent decades, it under the overall background with rapid changepl. never-ending changes and improvements of science and technology, mines
Mechanization Level be continuously improved, dense-medium separation technology it is improved day by day, cause slime content during coal separation also sharply to increase, after giving
Continuous coal slime processing links bring very big challenge.
At present coal preparation plant often with classifying cyclone to coal slime through row 0.25mm pre-classification ,+0.25mm coarse granule coal slime is used
TBS interferes bed sorting, -0.25mm fine grained coal slime flotation device or flotation column recycling.But in the actual production process, on the one hand
Classifying cyclone operational efficiency is difficult to ensure that another aspect TBS interference bed is also difficult to control coal grain separating effect near 1mm.
Cause in practical floatation process, floatation feed particle size range is often between 0-1mm.And conventional flotation equipment to granularity model
Enclose coal slime between 0.074-0.25mm can effectively stable recycling, for the coal slime between 0.25-1mm, mineral laden bubble is vulnerable to floating
Ore pulp disturbing influence in optional equipment, the desorption phenomenon between coal grain and bubble is serious, and flotation effect is bad.
Conventional flotation column is compared with flotation device, though p- 0.074mm or less subparticle selection performance is controlled, flotation
Ore pulp turbulivity in column can also decrease, but dynamic circulation of the ore pulp in flotation column, between bubble and coarse granule coal slime
Stick there are still influence, be unfavorable for coarse granule recycling, leading to " running thick ", phenomenon takes place frequently, tail coal ash content is difficult to improve, calorific value occupies
The problems such as height does not descend, entire flotation link morbid state operation.
Due to only one cylinder of traditional flotation column, the flotation section in cylinder middle and upper part completes froth flotation, the rotation of lower part
It flows section and completes eddy flow centrifugal classification, the discharge of tailing is completed in bottom, and bottom separately sets interface and extracts ore pulp for recycling.Tradition is floating
The purpose for selecting above-mentioned circulation in column is: coal (coal particle between cleaned coal and spoil) is occurred by circulating pump, microvesicle in
The devices such as device feed flotation column lower part along cyclone pipe with certain pressure tangent line；The effect of circulation is: one side tangent line feeds to be formed
Eddy flow completes eddy flow centrifugal classification and provides microvesicle on the other hand by releasing stress bubble for flotation section flotation.Therefore,
Above-mentioned many processes in traditional flotation column occur in a flotation column, and especially extracting ore pulp from flotation column bottom, this is dynamic
State process will certainly have an impact ore pulp fluid stability in flotation column, be unfavorable for sticking between bubble and ore particle.
Therefore, the characteristics of recycling, is difficult to coarse granule according to the increasing production status of slime content and conventional flotation column,
Targetedly study, develop it is novel suitable for coarse granule recycling static flotation method it is significant, prospect is considerable.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of static flotation method suitable for coarse granule recycling, to solve
The problem of certainly existing method for floating processing capacity is small, separating effect is poor and is not able to satisfy coarse granule drying slime requirement.
The purpose of the present invention is mainly achieved through the following technical solutions:
A kind of method for floating suitable for coarse granule recycling, includes the following steps:
Step 1: filling clear water into the second cylinder by water injection pipe, and 1/5~1/3 volume is injected into the first cylinder
Clear water；
Step 2: opening circulating pump and bubble generator, the intracorporal clear water of the second column are spilled over in the first cylinder, the second column
Microvesicle is generated in vivo；
Step 3: after the velocity-stabilization that the intracorporal clear water of the second column is overflowed into the first cylinder, by the coal of preparatory mineralising
Mud material feeds feed distributor, carries out flotation, wherein flotation concentrate is recycled by discharge nozzle, and tail coal is arranged through underflow pipe/outlet
Out.
Further, further includes:
Step 4: in floating-upward process, part cleaned coal particle enters in the first cylinder the cleaned coal particle in the second cylinder, the
Ore pulp in one cylinder carries out external static circulation in fluid circulating line；
Step 5: the ore pulp in fluid circulating line tangentially feeds through the cyclone pipe of the second cylinder lower part with certain pressure
The conical section of two cylinder lower parts；
Step 6: with the continuous progress of flotation, the bubble in the second cylinder carries cleaned coal particle and constantly floats and assemble
Froth bed is formed, when foam layer height is more than the first cylinder upper surface, the flotation concentrate overflow in froth bed goes out the first cylinder,
It is flowed out through overflow launder by discharge nozzle, the tail coal of the second cylinder bottom is discharged through underflow pipe/outlet, above-mentioned steps four to step 6
It circuits sequentially, until entire flotation terminates.
Further, it in step 3, specifically includes:
Process one: coal slime material is uniformly fallen into the second cylinder by self gravity, fills sieve plate and the second column by multilayer
Ascending current forms adverse current in body, and the coal slime to cause to fall and break collides with ascending current, wherein the good cleaned coal of surface hydrophobic
Grain sticks with bubble and is floated, and the spoil particle of surface hydrophobic difference does not stick with bubble and fallen；
Process two: the coal slime material of preparatory mineralising is fed in the froth bed of the first cylinder through being fed distributor, coal slime material
First time sorting is carried out in froth zone；
Process three: it does not fall into the second cylinder, and is pressed from both sides in ascending current under the effect of gravity with the coal slime that foam floats
Miscellaneous microvesicle collides contact, and second of flotation is carried out in the second cylinder.
Further, in process one, the adjusting intracorporal mineral syrup liquid of the first column is concordant with the second cylinder upper end, the second cylinder
The middle bubble for carrying cleaned coal particle floating is assembled on mineral syrup liquid in the first cylinder, forms the froth bed of certain depth, and
The height of froth bed is kept to maintain dynamic equilibrium during entire coal slime flotation.
Further, in step 5, the weight product in ore pulp containing spoil contains cleaned coal along the cone wall decline of the second cylinder eddy flow section
It is gas-solid-liquid mixing liquid stream rise in the second cylinder.
Further, using the Static Flotation Column for being suitable for coarse granule recycling, Static Flotation Column includes the first cylinder and second
Cylinder, the first cylinder and the second cylinder are barrel-like structure, and the second columnar part is nested in the first cylinder；Second cylinder top
Feed distributor is equipped in opening to the space of the first cylinder top end opening, feed distributor is connect with feeding pipe；Feed distribution
The top of device is equipped with water distributor；The top excircle of first cylinder is equipped with overflow launder；The bottom of first cylinder and the second cylinder
Bottom connects to form fluid circulating line by diversion pipe.
Further, nested are as follows: the bottom plate of the first cylinder of top of the second cylinder is penetrated and sealed nested set on first
In cylinder；Fluid flows to along fluid circulating line, and diversion pipe is successively arranged circulating pump, bubble generator and mineralising pipe.
Further, the bottom of the first cylinder is equipped with the first flow-guiding mouth, and the bottom of the second cylinder is equipped with the second flow-guiding mouth, leads
The both ends of flow tube are connect with the first flow-guiding mouth, the second flow-guiding mouth respectively.
Further, cyclone pipe is equipped in the lower part of the second cylinder, cyclone pipe is connect with the second flow-guiding mouth；Second cylinder
Lower sides are connected with water injection pipe；The bottom of second cylinder is pyramidal structure, and the bottom of the second cylinder is equipped with for bottom material to be discharged
Underflow pipe/outlet.
Further, the second column body is equipped with multilayer and fills sieve plate.
Compared with prior art, the present invention one of at least has the advantages that:
A) method for floating provided by the invention suitable for coarse granule recycling, by inside and outside nested double-deck cylinder design, first
Cylinder undertakes the effect of middling cycle, and compared to the second cylinder or common flotation column for carrying out flotation, floatation process realizes ore pulp
External static circulation, reduces the disturbing influence to ore pulp in the second cylinder floatation process, realizes mild flotation environment, have
Effect improves the collision sticking probability of particle and bubble, reduces coarse grained desorption, improves coarse grained recovering effect, can
It is widely used in the coal slime flotation of coarse granule recycling.
B) method for floating provided by the invention suitable for coarse granule recycling, by setting and the feeding pipe of mineral syrup liquid, gives
Expect distributor, the optimization of water distributor installation site, realization is fed in froth bed, and the collision for being conducive to cleaned coal particle and bubble is glutinous
It is attached, cooperate the flushing water at top, coal slime is completed to sort in advance in froth bed, and the good cleaned coal particle of hydrophobicity easily sticks with bubble
Bubble layer is rested on, the spoil particle of hydrophobicity difference, which is not easy to stick with bubble, falls into lower section the second cylinder of flotation column, cooperation first
Water distributor in cylinder at the top of froth bed, flushing water go out the gangue particle being mingled between bubble, realize into float coal mud
Primary effectively sorting, it is significant particularly with the recovering effect of coarse granule cleaned coal, reduce the hair of coarse granule and bubble desorption phenomenon
It is raw, facilitate coarse grained recycling, promotes separating effect.
It in the present invention, can also be combined with each other between above-mentioned each technical solution, to realize more preferred assembled schemes.This
Other feature and advantage of invention will illustrate in the following description, also, certain advantages can become from specification it is aobvious and
It is clear to, or understand through the implementation of the invention.The objectives and other advantages of the invention can by specification, claims with
And it is achieved and obtained in specifically noted content in attached drawing.
Detailed description of the invention
Attached drawing is only used for showing the purpose of specific embodiment, and is not to be construed as limiting the invention, in entire attached drawing
In, identical reference symbol indicates identical component.
Fig. 1 is the schematic diagram of the section structure for being suitable for the Static Flotation Column of coarse granule recycling in embodiment.
Appended drawing reference:
1- feeding pipe；2- diversion pipe；The first cylinder of 3-；The second cylinder of 4-；5- cyclone pipe；6- circulating pump；7- overflow launder；8
Discharge nozzle；9- water distributor；10- is fed distributor；11- water injection pipe；12- bubble generator；13- fills sieve plate；14- mineralising pipe；
15- underflow pipe/outlet；16- water injection pipe；A, b, c, d, e- pulp flow direction.
Specific embodiment
Specifically describing the preferred embodiment of the present invention with reference to the accompanying drawing, wherein attached drawing constitutes the application a part, and
Together with embodiments of the present invention for illustrating the principle of the present invention, it is not intended to limit the scope of the present invention.Phase in embodiment
Close term and make following agreement: middle coal refers to that the coal particle between cleaned coal and spoil, chats refer to the ore pulp containing middle coal.Mine
The direction of motion is starched, refers to ore pulp/clear water flowing direction in floatation process, a, b, c, d, e are Static Flotation Column section in Fig. 1
The signal direction of middle pulp flow.
Embodiment one
A specific embodiment of the invention discloses a kind of static flotation method suitable for coarse granule recycling, use
Flotation rod structure is as shown in Figure 1, the static flotation method includes the following steps:
Step 1: it is filled the water into the first cylinder 3 and the second cylinder 4.Specifically, before starting coal slime flotation, the is closed
One flow-guiding mouth and underflow pipe/outlet 15 are opened water injection pipe 11 and are switched, start water pump, fill clear water into the second cylinder 4, the
After filling water in two cylinders 4, water, which overflows, to be flowed into the second cylinder 4, and the clear water of 1/5~1/3 volume is injected in the first cylinder 3, excellent
It selects and injects 1/4 volume clear water into the first cylinder 3, water filling finishes, and closes water injection pipe 11.
Step 2: opening circulating pump 6 and bubble generator 12, and the clear water in the second cylinder 4 is spilled over in the first cylinder 3,
In flotation column section as shown in Figure 1, the clear water in the second cylinder 4 is recycled according to direction of motion a, b；Adjust bubble
Air door on device 12, making to generate in the second cylinder 4 is suitable for stable microvesicle (i.e. bubble).
Step 3: after the velocity-stabilization that the clear water in the second cylinder 4 is overflowed into the first cylinder 3, ore pulp is pre-processed
The coal slime material of preparatory mineralising feeds the feed distributor 10 on 4 top of the second cylinder by feed pipe 1 in device, carries out flotation.Its
In, step 3 specifically includes following three process:
Process one: initial procedure.Coal slime material is uniformly fallen into the second cylinder 4 by self gravity, is filled and is sieved by multilayer
Ascending current forms adverse current in plate 13 and the second cylinder 4, and the coal slime to cause to fall and break collides with ascending current, wherein surface hydrophobicity
The good cleaned coal particle of property sticks with bubble and is floated, and the spoil particle of surface hydrophobic difference does not stick with bubble and fallen.It adjusts
Mineral syrup liquid in first cylinder 3 is concordant with 4 upper end of the second cylinder, and the bubble that cleaned coal particle floats is carried in the second cylinder 4 and is existed
Assemble on mineral syrup liquid in first cylinder 3, forms the froth bed of certain depth, and pass through the air inlet of control bubble generator 12
Amount, the speed of the charging of feed pipe 1 and 15 discharge of underflow pipe/outlet and flow are to keep the height of froth bed floating in entire coal slime
Dynamic equilibrium is maintained during choosing.
Process two: froth bed feed carries out first time sorting.The coal slime material of preparatory mineralising is distributed through feed pipe 1 by feed
Device 10 is fed in the froth bed in the first cylinder 3 on mineral syrup liquid, and coal slime material is sorted in advance in froth zone.Wherein,
The good cleaned coal particle of hydrophobicity and bubble, which collide to stick, to be rested in froth bed, the general cleaned coal of hydrophobicity and spoil particle
And hydrophobicity it is good not with the cleaned coal particle of bubble floating under the effect of gravity, fall into the second cylinder 4 and then carry out second
Sorting.In the process, the flushing water in water distributor 9 rinses the froth bed on 3 top of the first cylinder, flushing water hole between bubble
The gangue particle being mingled with constantly is taken away to flowing down in road, due to flow fields environment mild in froth bed and a large amount of existing air waters circle
Face improves the collision probability of cleaned coal particle and bubble, especially increases three-phase when coarse granule cleaned coal sticks with bubble and moistens
Wetted perimeter edge lengths improve the sticking probability of coarse granule and bubble, reduce the desorption probability of coarse granule and bubble, realize to thick
The first time selective recovery of particle and fine grained cleaned coal.
Second of flotation is carried out in three: the second cylinder 4 of process.It is not fallen under the effect of gravity with the coal slime that foam floats
In second cylinder 4, collides and contact with the microvesicle being mingled in ascending current.Multilayer filling sieve plate 13 in second cylinder 4 is right
Whereabouts coal slime plays buffer function, reduces because coal slime whereabouts effect of inertia leads to the disturbance to ore pulp, ensure that second
The stabilization of ore pulp in cylinder 4, the good cleaned coal particle that is conducive to hydrophobicity is contacted with bubble hit to be sticked and floats, especially
The desorption probability in coarse granule cleaned coal floatation process with bubble is reduced, coarse grained recycling is enhanced.
Step 4: chats external static circulation.(the movement in Fig. 1 in cleaned coal particle floating-upward process in second cylinder 4
Direction c), will receive ore pulp disturbing influence, and the general cleaned coal particle of partially hydrophobic enters the (fortune in Fig. 1 in the first cylinder 3
Dynamic direction a, b).Is mixed into during a small amount of coarse granule cleaned coal and spoil fall into the second cylinder 4 from froth bed in addition, also having
In one cylinder 3.Ore pulp in first cylinder 3 carries out external static circulation in fluid circulating line, specifically, the first cylinder 3
In ore pulp through diversion pipe 2, pass sequentially through circulating pump 6, bubble generator 12, mineralising pipe 14 and realize external static circulation, improve
Circulation reduces the turbulivity of ore pulp, improves cleaned coal particle and stick with bubble to the perturbation action of ore pulp in the second cylinder 4
Stability, be especially reduction of the desorption probability of coarse granule cleaned coal and bubble, enhance the flotation of coarse granule cleaned coal.Wherein,
Ore pulp in first cylinder 3 refers to black water, the general cleaned coal particle of the hydrophobicity including falling into along direction of motion a, b and a small amount of
The coarse granule cleaned coal and water fallen from froth bed.
Step 5: eddy flow section sorting.Ore pulp in fluid circulating line is (i.e. through diversion pipe 2, circulating pump in the first cylinder 3
6, bubble generator 12, mineralising pipe 14 recycle the ore pulp of mineralising) cyclone pipe 5 with certain pressure through 4 lower part of the second cylinder is tangential
The conical section for feeding 4 lower part of the second cylinder is sorted in the second cylinder 4, and conical section is that the bottom of the second cylinder 4 is scanned
Area.Wherein, the weight product in ore pulp containing spoil is along the cone wall decline of 4 eddy flow section of the second cylinder, gas-solid-liquid mixed liquor containing cleaned coal
Stream rises in the second cylinder 4, is acted on, is improved to the selective recovery for entering float coal mud by the intensified sorting of centrifugal force field.
Step 6: discharging process.With the continuous progress of flotation, it is continuous that the bubble in the second cylinder 4 carries cleaned coal particle
It floats, constantly aggregation forms froth bed on mineral syrup liquid in the first cylinder 3, when foam layer height is more than on the first cylinder 3
When end face, the flotation concentrate overflow in froth bed goes out the first cylinder 3 (direction of motion d, e in Fig. 1), through overflow launder 7 by going out
Expects pipe 8 flows out, and the tail coal of 4 bottom of the second cylinder is discharged through underflow pipe/outlet 15, and above-mentioned steps four to step 6 are successively followed
Ring, until entire flotation terminates.
Compared with prior art, the method for floating provided in this embodiment suitable for coarse granule recycling, by inside and outside nested double
Layer cylinder design, floatation process realizes ore pulp external static circulation, can effectively improve the collision sticking probability of particle and bubble, dredges
Aqueous good cleaned coal particle, which easily sticks with bubble, rests on bubble layer, and the spoil particle of hydrophobicity difference, which is not easy to stick with bubble, to be fallen into
The second cylinder of lower section flotation column 4 cooperates the water distributor 9 in the first cylinder 3 at the top of froth bed, the arteries and veins that flushing water will be mingled between bubble
Stone particle is gone out, and the first time realized into float coal mud effectively sorts, significant particularly with the recovering effect of coarse granule cleaned coal, is subtracted
The generation for having lacked coarse granule and bubble desorption phenomenon, promotes separating effect.The coal slime of whereabouts is slowed down by filling sieve plate 13
And adverse current is formed with the ascending current in the second cylinder 4, it collides and sticks with the microvesicle being mingled in ascending current, hydrophobicity is good
Cleaned coal particle be attached on bubble with bubble floating, the spoil particle of hydrophobicity difference does not adhere to bubble and is fallen, thus mentions
The stability of separating effect is risen.Method for floating provided in this embodiment passes through the setting of mineral syrup liquid and feeding pipe 1, feed
Foam feed is realized in the optimization of 10 installation site of distributor, and the collision for being conducive to cleaned coal particle and bubble is sticked, and promotes flotation effect
Fruit；Ore pulp enters the second cylinder bottom through circulating pump 6, bubble generator 12,14 tangent line jet stream of mineralising pipe and scans in first cylinder 3
Area ensure that ore pulp is stable in the second cylinder 4 and move upwards, increase bubble buoyancy, and provide the eddy flow field of force and scan,
Improve the rate of recovery.The feed distributor 10 being arranged on feeding pipe 1 is fed in froth bed, cooperates the flushing water at top, and coal slime exists
Sorting in advance is completed in froth bed, facilitates coarse grained recycling.
Embodiment two
A specific embodiment of the invention discloses and is suitable in the static flotation method of coarse granule recycling in embodiment one
What is used is suitable for the Static Flotation Column of coarse granule recycling, as shown in Figure 1, including the first cylinder 3 and the second cylinder 4, the first cylinder 3
It is barrel-like structure with the second cylinder 4,4 part of the second cylinder is nested in the first cylinder 3；Second cylinder, 4 top end opening is to
Feed distributor 10 is equipped in the space of one cylinder, 3 top end opening, feed distributor 10 is connect with feeding pipe 1；It is fed distributor
10 top is equipped with the water distributor 9 connecting with flush water pump；The top excircle of first cylinder 3 is equipped with overflow launder 7；First cylinder
3 bottom connect to form fluid circulating line with the bottom of the second cylinder 4 by diversion pipe 2.
In the present embodiment, 4 part of the second cylinder is nested in the first cylinder 3, specific nested are as follows: the second cylinder 4 it is upper
The bottom plate of the first cylinder of portion 3 is penetrated and is sealed nested set on the first cylinder 3.Fluid circulating line includes diversion pipe 2, along fluid
Fluid flows in circulation line, and diversion pipe 2 is successively arranged circulating pump 6, bubble generator 12 and mineralising pipe 14；First cylinder 3
Bottom is equipped with the first flow-guiding mouth, and the bottom of the second cylinder 4 is equipped with the second flow-guiding mouth, the both ends of diversion pipe 2 respectively with the first water conservancy diversion
Mouth, the connection of the second flow-guiding mouth.
In the present embodiment, cyclone pipe 5 is equipped in the lower part of the second cylinder 4, cyclone pipe 5 is connect with the second flow-guiding mouth；Second
The lower sides of cylinder 4 are connected with water injection pipe 11；The bottom of second cylinder is pyramidal structure, and the bottom of the second cylinder, which is equipped with, to be used for
Underflow pipe/outlet 15 of bottom material is discharged.Through diversion pipe 2, circulating pump 6, bubble generator 12, mineralising pipe 14 in first cylinder 3
Recycle the circular cone that cyclone pipe 5 of the ore pulp of mineralising with certain pressure through 4 lower part of the second cylinder tangentially feeds 4 lower part of the second cylinder
Section, this section are that area is scanned in the bottom of the second cylinder 4.On the one hand it is inclined to provide rising for the second cylinder 4 for the flotation column of this structure
Stream, effectively increases bubble buoyancy, on the other hand provides the eddy flow field of force and scan, and improves the rate of recovery.
For traditional flotation column in floatation process, coal particle whereabouts inertia is big, after coal particle is contacted with bubble hit, desorption
Probability is very big, and flotation effect is poor.Thus, it is contemplated that trapping area's ore pulp turbulent velocity influences flotation effect, and the second column body is set
There is multilayer to fill sieve plate 13, filling sieve plate 13 is set to 5 or more cyclone pipe, it is preferable that the quantity of filling sieve plate 13 is 3~6 layers, edge
The spacing of the longitudinal centre line of second cylinder 4, adjacent two fillings sieve plate 13 is identical, alternatively, adjacent two fillings sieve plate from top to bottom
13 spacing is gradually reduced, the second cylinder 4 with multilayer filling sieve plate 13, can significantly reduce trapping area's ore pulp turbulent flow speed
Degree increases buffer time, reduces the desorption of coarse granule coal, promotes the efficiency of separation.
In order to further decrease trapping area's ore pulp turbulent velocity, increase buffer time, filling sieve plate 13 is wavy shaped configuration,
Sieve pore is set to the wave trough position of filling sieve plate 13, and the coal particle for falling in filling 13 crest location of sieve plate slides from crest location to wave
Paddy position increases preparatory buffer stage on every layer of filling sieve plate 13, has compared with the filling sieve plate 13 of horizontal structure longer
Buffer time, the efficiency of separation are more preferable.
In the present embodiment, the bottom plate of overflow launder 7 opens up discharge port 8, and the bottom plate of overflow launder 7 is lower than the top of the first cylinder 3
Opening；Preferably, the bottom plate of overflow launder 7 is obliquely installed, it is preferable that the angle of 3 longitudinal centre line of bottom plate and the first cylinder is 45 °
~75 °, bottom plate has the overflow launder 7 of certain tilt angle, and flotation particle can quickly be discharged, avoid flotation in overflow launder 7
Grain accumulation causes to block, and ensure that the job stability of flotation column.The ore pulp to float in order to prevent overflows, and overflow launder 7 is equipped with lid
Plate can prevent ore pulp/foam overflow, ensure that the stability of flotation column work.
In the present embodiment, water distributor 9 is 8 claw structure, and water distributor 9 is equipped with flow valve, and the water distributor 9 of this structure can
It falls in water uniformly on the froth bed of 3 upper end of the first cylinder, avoids flotation dead angle area, and can be according to coal slurry flotation item
Part setting and the amount of water sprayed and water-jet velocity for adjusting water distributor 9, coal slime are completed to sort in advance in froth bed, facilitate coarse granule
Recycling, improve flotation effect, optimize flotation flowsheet.
Compared with prior art, the Static Flotation Column provided in this embodiment suitable for coarse granule recycling, passes through the first cylinder 3
With 4 nested designs of the second cylinder, structure is simple, stable, adaptable, processing capacity is strong, and the first cylinder 3 undertakes chats and follows
The effect of ring, compared to carry out flotation the second cylinder 4 or common flotation column, ore pulp recycle the characteristics of be it is external, static,
It is advantageously implemented ore pulp static external circulation, reduces the disturbing influence to ore pulp in the second cylinder floatation process, realizes temperature
The flotation environment of sum, reduces coarse grained desorption, improves coarse grained recovering effect, can be widely applied for coarse granule and returns
The coal slime flotation of receipts.In addition, the Static Flotation Column provided in this embodiment suitable for coarse granule recycling, is fed distributor 10 in foam
Layer feed, the interior multilayer that is equipped with of the second cylinder 4 fill sieve plate 13, play buffer function to the coal slime particle to fall from froth bed,
The disturbance to ore pulp is slowed down, mild flow fields environment is provided to the flotation of coal slime particle, is reduced to coarse granule cleaned coal
Desorption.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of method for floating suitable for coarse granule recycling, which comprises the steps of:
Step 1: filling clear water in the second cylinder (4) by water injection pipe (11), to injection 1/5~1/3 in the first cylinder (3)
The clear water of volume；
Step 2: opening circulating pump (6) and bubble generator (12), and the clear water in the second cylinder (4) is spilled over to the first cylinder (3)
It is interior, microvesicle is generated in the second cylinder (4)；
Step 3: after the velocity-stabilization that the clear water in the second cylinder (4) is overflowed into the first cylinder (3), by preparatory mineralising
Coal slime material feeds feed distributor (10), carries out flotation, wherein flotation concentrate is recycled by discharge nozzle (8), and tail coal is through underflow
Pipe/outlet (15) discharge.
2. the method for floating according to claim 1 suitable for coarse granule recycling, which is characterized in that further include:
Step 4: in floating-upward process, part cleaned coal particle enters in the first cylinder (3) the cleaned coal particle in the second cylinder (4),
Ore pulp in first cylinder (3) carries out external static circulation in fluid circulating line；
Step 5: the ore pulp in fluid circulating line is tangentially fed with certain pressure through the cyclone pipe (5) of the second cylinder (4) lower part
The conical section of the second cylinder (4) lower part；
Step 6: with the continuous progress of flotation, the bubble in the second cylinder (4) carries cleaned coal particle and constantly floats and assemble shape
At froth bed, when foam layer height is more than the first cylinder (3) upper surface, the flotation concentrate overflow in froth bed goes out the first cylinder
(3), it being flowed out through overflow launder (7) by discharge nozzle (8), the tail coal of the second cylinder (4) bottom is discharged through underflow pipe/outlet (15),
Above-mentioned steps four to step 6 circuits sequentially, until entire flotation terminates.
3. the method for floating according to claim 1 or 2 suitable for coarse granule recycling, which is characterized in that in step 3, specifically
Include:
Process one: coal slime material is uniformly fallen into the second cylinder (4) by self gravity, passes through multilayer filling sieve plate (13) and second
Ascending current forms adverse current in cylinder (4), and the coal slime to cause to fall and break collides with ascending current, wherein the good essence of surface hydrophobic
Coal particle sticks with bubble and is floated, and the spoil particle of surface hydrophobic difference does not stick with bubble and fallen；
Process two: the coal slime material of preparatory mineralising is fed in the froth bed of the first cylinder (3) through being fed distributor (10), coal slime object
Material carries out first time sorting in froth zone；
Process three: it does not fall into the second cylinder (4), and is mingled in ascending current under the effect of gravity with the coal slime that foam floats
Microvesicle collide contact, second of flotation is carried out in the second cylinder (4).
4. the method for floating according to claim 3 suitable for coarse granule recycling, which is characterized in that in process one, adjust the
Mineral syrup liquid in one cylinder (3) is concordant with the second cylinder (4) upper end, and the gas that cleaned coal particle floats is carried in the second cylinder (4)
Bubble is assembled on the first cylinder (3) interior mineral syrup liquid, forms the froth bed of certain depth, and keep the height of froth bed whole
Dynamic equilibrium is maintained during a coal slime flotation.
5. the method for floating according to claim 2 suitable for coarse granule recycling, which is characterized in that in step 5, in ore pulp
Weight product containing spoil is along the cone wall decline of the second cylinder (4) eddy flow section, and gas-solid-liquid mixing liquid stream containing cleaned coal is in the second cylinder
(4) rise in.
6. the method for floating according to any one of claims 1 to 5 suitable for coarse granule recycling, which is characterized in that using suitable
In coarse granule recycling Static Flotation Column, the Static Flotation Column include the first cylinder (3) and the second cylinder (4), described first
Cylinder (3) and the second cylinder (4) are barrel-like structure, and second cylinder (4) is partially nested in the first cylinder (3)；
Feed distributor is equipped in second cylinder (4) top end opening to the space of the first cylinder (3) top end opening
(10), the feed distributor (10) connect with feeding pipe (1)；
The top of feed distributor (10) is equipped with water distributor (9)；
The top excircle of first cylinder (3) is equipped with overflow launder (7)；
The bottom of first cylinder (3) connect to form fluid circulation with the bottom of second cylinder (4) by diversion pipe (2)
Pipeline.
7. the method for floating according to claim 6 suitable for coarse granule recycling, which is characterized in that the nesting are as follows: described
The bottom plate of the first cylinder of top (3) of second cylinder (4) penetrates and seals nested be set in first cylinder (3)；
Fluid flows to along the fluid circulating line, and the diversion pipe (2) is successively arranged circulating pump (6), bubble generator
(12) and mineralising pipe (14).
8. the method for floating according to claim 7 suitable for coarse granule recycling, which is characterized in that first cylinder (3)
Bottom be equipped with the first flow-guiding mouth, the bottom of second cylinder (4) is equipped with the second flow-guiding mouth, the both ends of the diversion pipe (2)
It is connect respectively with the first flow-guiding mouth, the second flow-guiding mouth.
9. the method for floating according to claim 7 or 8 suitable for coarse granule recycling, which is characterized in that second cylinder
(4) cyclone pipe (5) are equipped in lower part, the cyclone pipe (5) connect with second flow-guiding mouth；
The lower sides of second cylinder (4) are connected with water injection pipe (11)；
The bottom of second cylinder is pyramidal structure, and the bottom of second cylinder (4) is equipped with the underflow for bottom material to be discharged
Pipe/outlet (15).
10. being suitable for the method for floating of coarse granule recycling described in -9 according to claim 1, which is characterized in that second cylinder
Inside is equipped with multilayer filling sieve plate (13).
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