CN109759241B - A kind of device and method of width particle size fraction coal slime flotation - Google Patents
A kind of device and method of width particle size fraction coal slime flotation Download PDFInfo
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- CN109759241B CN109759241B CN201910099609.1A CN201910099609A CN109759241B CN 109759241 B CN109759241 B CN 109759241B CN 201910099609 A CN201910099609 A CN 201910099609A CN 109759241 B CN109759241 B CN 109759241B
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Abstract
The invention discloses a kind of device and methods of wide particle size fraction coal slime flotation, and coal washing field uses.Including classifying cyclone, circulating pump, cavitation pipe and wide grade flotation column；The width grade flotation column includes cylindrical barrel body, feed pipe is equipped at the top of cylindrical barrel body, feed pipe exit normal is down-set in body centre, cylindrical barrel body bottom is vertically equipped with the baffle of arcuate structure, the height of baffle is to design the half of liquid level, the overflow outlet of classifying cyclone and the entrance pipe of circulating pump connect, the top feeding inlet piping connection of the underflow outlet of classifying cyclone and wide grade flotation column, the outlet of circulating pump is connected by pipeline with the entrance of cavitation pipe, and the outlet of cavitation pipe is connected by pipeline with wide grade flotation column bottom feeding inlet.The technique improves the collision probability between fine grained and bubble by high turbulent cavitation pipe, while the desorption probability reduced between coarse granule and bubble is fed by froth bed, to effectively increase wholegrain grade flotation recovery rate.
Description
Technical field
The present invention relates to a kind of device and methods of wide particle size fraction coal slime flotation, are particularly suitable for a kind of coal washing field
The device and method of the wide particle size fraction coal slime flotation used.
Background technique
The present invention is the wide grade coal slime sorting unit and method based on cyclone classification-branch to stock column flotation, mainly
Purpose is to provide a kind of effective solution for the sorting recycling of wide grade material.
The energy reserves entirety feature in China is " rich coal, oil-poor, few gas ", for a comparatively long period of time, the energy in China
Source structure will keep the pattern based on coal, and coal will play an irreplaceable role in national economy life.
Along with China, mechanical and technique progress, the exploitation of coal in China have reformed machinery into Mineral Processing Engineering
Based on exploitation, sorting process by pervious jigging sort based on reform into and sorted now with dense medium based on, thus also bring point
The problem of coal slurry content rises in system is selected, and the deterioration of the raw coal coal quality produced now is then even more further increasing system
The middle slime content that need to be handled.Ratio enters float coal mud in floatation system before, due to the deterioration of coal quality, enters in float coal mud now
Subparticle (less than 45 μm) content increase there has also been significant, this more step exacerbates the pressure of coal slime processing system.
As slime separation device and method, column flotation method ratio in terms of the guarantee of quality of cleaned coal are widely used now
Have more advantage in other device and methods, be selected in now coal quality it is general worsening in the case where, for whole process flow
For, advantage of the flotation column in terms of guaranteeing quality of cleaned coal is then further obvious.
Traditional flotation column and its related process generally enters the coal slime of floating -0.5mm, since coal slime contains in feed coal now
Universal excessively high, the technique of the universal preparation of deslimed raw coal of coal preparation plant of amount, partition size 1mm, as a result, in entire technique, Dan Danyi
It is inadequate in dealing with the coal slime generated after desliming by traditional flotation column and its related process, also needs to increase rough coal mud treatment system,
Increase the complexity of technique and the investment of integrated engineering.In addition, even if entering the coal slime of floating -0.5mm, traditional flotation column and
Its related process still remains the problems such as " running thick " and selecting property of subparticle poor (less than 45 μm).
The coal slime particle that " running thick " is relatively large in diameter sheds into product from failing from bubble, causes smart in floatation process
The low phenomenon of coal recovery.Coarse grain coal slime typically occurs in the adverse current collision area of flotation column from falling off for bubble surface, when thick
After beans mud adheres to bubble, particle need to also rise floating longer one section of region with bubble just can enter froth bed, then enter with overflow
Head coal product rises floating process with bubble in coarse grain, and due to the influence of the biggish quality of coarse grain coal slime and other factors, coarse grain is easy
It falls off from bubble.
In traditional feed-type, the adherency of bubble and coal intergranular typically occurs in the adverse current impact zone in flotation column
Domain, for subparticle (less than 45 μm), since granularity is meticulous, particle is moved more vulnerable to flow field etc. with aqueous strong
The influence of aspect factor, thus there is a problem that subparticle is low with the probability that bubble collides, and when particle can be with gas
After bubble collides, and it there is a problem that bubble to Selective feeding difference.
From the foregoing, it can be seen that coal slurry content is more and more in feed coal now, subparticle in coal slime (less than 45 μm)
The status that content is also gradually increasing, and generally taken in site technique under the whole status of 1mm preparation of deslimed raw coal, develop a kind of be applicable in
It is sorted in wide grade, and subparticle in floating raw material (less than 45 μm) can be successfully managed and coarse granule (300 μm -1000 μm) contains
Measure the device and method of the high coal slime flotation different with traditional flotation column device and method.
Summary of the invention
Shortcoming in view of the above technology, provides that a kind of structure is simple, and using effect is good, realizes and is less than to partial size
1000 μm of wholegrain grade enters the device and method of the wide particle size fraction coal slime flotation of the flotation recovery of float coal mud.
To realize the above-mentioned technical purpose, a kind of wide particle size fraction coal slime flotation device of the invention, including classifying cyclone, are followed
Ring pump, cavitation pipe and wide grade flotation column；The width grade flotation column includes cylindrical barrel body, is equipped with feed at the top of cylindrical barrel body
Pipe, feed pipe exit normal is down-set in body centre, and cylindrical barrel body bottom is vertically equipped with the baffle of arcuate structure, baffle
Height is the half of design liquid level, and cylindrical barrel body bottom space closer to one section of discharge port and is divided into space body by baffle
Product two parts of different sizes；The big section bottom of spatial volume is equipped with feeding inlet, and the small section bottom of spatial volume is equipped with tail
Coal export；
The overflow outlet of classifying cyclone and the entrance pipe of circulating pump connect, the underflow outlet of classifying cyclone and wide grain
The top feeding inlet piping connection of grade flotation column, the outlet of circulating pump are connected by pipeline with the entrance of cavitation pipe, cavitation pipe
Outlet be connected by pipeline with wide grade flotation column bottom feeding inlet.
The cavitation pipe Venturi tube sucks air by the air scoop in Venturi tube and generates microvesicle in inside.
A kind of width particle size fraction coal slime flotation method, its step are as follows:
The wide grade after sizing mixing first is entered float coal mud to feed in classifying cyclone, classifying cyclone partition size is
125 μm, the wide grade fed is entered into float coal mud after classifying cyclone processing and forms ore pulp, final ore pulp is divided into classifying cyclone and overflows
Stream and classifying cyclone underflow, wherein the granularity of classifying cyclone overflow is the fine fraction slurries less than 125 μm, classifying cyclone
The granularity of underflow is the coarse fraction slurries greater than 125 μm；
Classifying cyclone overflow is fed in circulating pump by pipeline, and classifying cyclone overflow pulp is fed cavitation by circulating pump
Pipe, and utilize the sucking of venturi structure realization air to form microvesicle in cavitation pipe, the flow field of disorder then realizes mineralising
The mixture of the formation of bubble, mineral laden bubble and ore pulp is exported from the outlet of cavitation pipe, inputs wide grade flotation column by pipeline
Bottom feeding inlet enter in wide grade flotation column, the ore pulp after mineralising under the effect of the pressure wide grade flotation column bottom keep off
Eddy flow is formed in space between plate and wide grade flotation column side wall, the bubble in ore pulp after making mineralising rises and ultimately forms
Froth bed, while bottom baffle has completely cut off the connection of the mineral laden bubble for having just enter into bottom and ore pulp and discharge port, prevent ore pulp and
Bubble is directly lost from discharge port；
Classifying cyclone underflow is by feeding the upper area of froth bed above feed pipe leniently grade flotation column, through steeping
After foam layer sorting, due to the difference of surface nature, coal grain and bubble occur to adhere to and ultimately reside in froth bed, and coarse grain spoil
Then decline, can also be adjacent inverse below froth bed if there is Coarse Coal grain to fall off from froth bed up to entering in wake flow always
Stream collision area is brought into froth bed by the bubble of rising, and final froth bed overflow, which goes out wide grade flotation column, becomes flotation essence
Coal, wake flow, which flows out wide grade flotation column, becomes floating tail-coal.
The utility model has the advantages that
The wholegrain grade that the present invention realizes to partial size less than 1000 μm enters the flotation recovery of float coal mud；
It is classified by classifying cyclone, realizes and separate to entering fine fraction and coarse fraction in float coal mud, be that the branch of the two is given
Material provides premise；Partial size is adjusted to directly to feed in circulating pump less than the feeding point of 125 μm of fine fraction coal slimes, circulating pump mentions
It is fed them into cavitation pipe for power, the collision probability between fine grained and bubble is improved by high turbulent cavitation pipe；In flotation column
Tail portion is equipped with curved baffle, the eddy flow formed in flotation column bottom and when being sorted, and it is a large amount of to can effectively prevent mineral laden bubble
It is lost and enters in wake flow；The feeding point that partial size is greater than 125 μm of coarse fraction mud coals is adjusted to top part in froth bed, by coarse grain
The sorting of grade is adjusted to froth bed sorting from bubble sorting, reduces the desorption probability between coarse granule and bubble, falls off slightly even if having
Grain can also carry out secondary adherency by the rising bubble in adverse current collision area and rise with bubble, and strong solves tradition
" running thick " problem that flotation column and its technique are commonly present, while the wide grade coal slime high to coarse granule (300 μm -1000 μm) content
Flotation effect is good；
The method that the present invention uses the processing of gradation grade, makes less than 125 μm fine fractions of partial size be directly entered the empty verbiage of high turbulence
Change pipe, effectively raises the collision between particulate and bubble and be more suitable now since exploitation coal quality deteriorates and generally existing grain
Subparticle content higher coal slime of the diameter less than 45 μm；Suitable for partial size less than 45 μm of subparticles and coarse granule (300 μ
M-1000 μm) flotation recovery of the high wide grade coal slime of content, it can effectively realize to the preparation of deslimed raw coal technique nowadays generally used
Simplification.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the device of wide particle size fraction coal slime flotation of the invention；
Fig. 2 is top view of the wide grade flotation column bottom about baffle in the device of wide particle size fraction coal slime flotation of the invention.
In figure: the wide grade after 1- sizes mixing enters float coal mud, 2- classifying cyclone overflow, and 3- provides the mine of power through circulating pump
It starches, the ore pulp after 4- mineralising, 5- classifying cyclone underflow, 6- floatation clean coal, 7- floating tail-coal, A- classifying cyclone, B- circulation
Pump, C- cavitation pipe, D- wide grade flotation column, E- feed pipe, F- baffle.
Specific embodiment
A specific embodiment of the invention is further detailed with reference to the accompanying drawing:
Such as Fig. 1, wide particle size fraction coal slime flotation device, it is characterised in that: it includes classifying cyclone A, circulating pump B, cavitation
Pipe C and wide grade flotation column D；The width grade flotation column D includes cylindrical barrel body, and feed pipe E, feed are equipped at the top of cylindrical barrel body
Pipe E exit normal is down-set in body centre, and cylindrical barrel body bottom is vertically equipped with the baffle F of arcuate structure, the height of baffle F
For the half for designing liquid level, cylindrical barrel body bottom space closer to one section of discharge port and is divided into spatial volume by baffle F
Two parts of different sizes；The big section bottom of spatial volume is equipped with feeding inlet, and the small section bottom of spatial volume is equipped with tail coal
Outlet；
The overflow outlet of classifying cyclone A is connect with the entrance pipe of circulating pump B, the underflow outlet of classifying cyclone A with
The outlet of the top feeding inlet piping connection of wide grade flotation column D, circulating pump B is connected by pipeline with the entrance of cavitation pipe C,
The outlet of cavitation pipe C is connected by pipeline with the width bottom grade flotation column D feeding inlet；The cavitation pipe C Venturi tube, passes through
Air scoop in Venturi tube sucks air and generates microvesicle in inside.
A kind of width particle size fraction coal slime flotation method, its step are as follows:
The wide grade after sizing mixing first is entered float coal mud 1 to feed in classifying cyclone A, classifying cyclone A is classified grain
Degree is 125 μm, and the wide grade fed is entered float coal mud 1 after classifying cyclone A processing and forms ore pulp, final ore pulp is divided into classification rotation
Device overflow 2 and classifying cyclone underflow 5 are flowed, wherein the granularity of classifying cyclone overflow 2 is the fine fraction slurries less than 125 μm,
The granularity of classifying cyclone underflow 5 is the coarse fraction slurries greater than 125 μm；
Classifying cyclone overflow 2 is fed in circulating pump B by pipeline, and circulating pump B gives 2 ore pulp 3 of classifying cyclone overflow
Enter cavitation pipe C, and realize the sucking of air using venturi structure in cavitation pipe C to form microvesicle, the flow field of disorder is then real
The formation of mineral laden bubble is showed, the mixture of mineral laden bubble and ore pulp is exported from the outlet of cavitation pipe C, is passed through pipeline and is inputted wide grain
The bottom feeding inlet of grade flotation column D enters in wide grade flotation column D, and the ore pulp 4 after mineralising is under the effect of the pressure in wide grade
Eddy flow, the gas in ore pulp 4 after making mineralising are formed in space between flotation column D bottom baffle F and wide grade flotation column D side wall
Bubble rises and ultimately forms froth bed, while bottom baffle F has completely cut off the mineral laden bubble for having just enter into bottom and ore pulp and discharge port
Connection, prevent ore pulp and bubble to be directly lost from discharge port, flotation column liquid level adjusting method also utilizes existing tailing
Case regulation technology；
Classifying cyclone underflow 5 is by feeding the upper area of froth bed, In above feed pipe E leniently grade flotation column D
After froth bed sorts, due to the difference of surface nature, coal grain and bubble occur to adhere to and ultimately reside in froth bed, and coarse grain
Spoil then always decline until enter wake flow in, if there is Coarse Coal grain to fall off from froth bed, can also below froth bed close to
Adverse current collision area brought into froth bed by the bubble of rising, final froth bed overflow go out width grade flotation column D become float
Cleaned coal 6 is selected, wake flow, which flows out wide grade flotation column D, becomes floating tail-coal 7.
Claims (3)
1. a kind of width particle size fraction coal slime flotation device, it is characterised in that: it includes classifying cyclone (A), circulating pump (B), cavitation
Manage (C) and wide grade flotation column (D)；The width grade flotation column (D) includes cylindrical barrel body, is equipped with feed pipe at the top of cylindrical barrel body
(E), feed pipe (E) exit normal is down-set in body centre, and cylindrical barrel body bottom is vertically equipped with the baffle of arcuate structure
(F), the height of baffle (F) is to design the half of liquid level, and baffle (F) is closer to discharge port one end and by cylindrical barrel body bottom
Portion space is divided into spatial volume two parts of different sizes；The big section bottom of spatial volume is equipped with feeding inlet, and spatial volume is small
Section bottom equipped with tail coal export；
The overflow outlet of classifying cyclone (A) is connect with the entrance pipe of circulating pump (B), the underflow outlet of classifying cyclone (A)
With the top feeding inlet piping connection of wide grade flotation column (D), the outlet of circulating pump (B) is entered by pipeline and cavitation pipe (C's)
Mouth is connected, and the outlet of cavitation pipe (C) is connected by pipeline with wide bottom grade flotation column (D) feeding inlet.
2. the device of width particle size fraction coal slime flotation according to claim 1, it is characterised in that: the cavitation pipe (C) is text
Venturi sucks air by the air scoop in Venturi tube and generates microvesicle in inside.
3. a kind of wide particle size fraction coal slime flotation method using wide particle size fraction coal slime flotation device described in claim 1, special
Sign is that steps are as follows:
The wide grade after sizing mixing first is entered float coal mud (1) to feed in classifying cyclone (A), classifying cyclone (A) classification
Granularity is 125 μm, and the wide grade fed is entered float coal mud (1) after classifying cyclone (A) processing and forms ore pulp, final ore pulp is divided into
Classifying cyclone overflow (2) and classifying cyclone underflow (5), wherein the granularity of classifying cyclone overflow (2) is less than 125 μm
Fine fraction slurries, the granularity of classifying cyclone underflow (5) are the coarse fraction slurries greater than 125 μm；
Classifying cyclone overflow (2) is fed in circulating pump (B) by pipeline, and circulating pump (B) is by classifying cyclone overflow (2) ore pulp
(3) it feeds cavitation pipe (C), and utilizes the sucking of Venturi tube structure realization air to form microvesicle in cavitation pipe (C), disorder
Flow field then realizes the formation of mineral laden bubble, and the mixture of mineral laden bubble and ore pulp is exported from the outlet of cavitation pipe (C), passes through pipe
The bottom feeding inlet that road inputs wide grade flotation column (D) enters in wide grade flotation column (D), and the ore pulp (4) after mineralising is in pressure
Under the action of form rotation in space between wide grade flotation column (D) bottom baffle (F) and wide grade flotation column (D) side wall
Stream, the bubble in ore pulp (4) after making mineralising rise and ultimately form froth bed, while bottom baffle (F) has completely cut off and has just enter into
The mineral laden bubble and ore pulp of bottom and the connection of discharge port prevent ore pulp and bubble to be directly lost from discharge port；
Classifying cyclone underflow (5) by feeding the upper area of froth bed above feed pipe (E) leniently grade flotation column (D),
After froth bed sorts, due to the difference of surface nature, coal grain and bubble occur to adhere to and ultimately reside in froth bed, and thick
Then decline is up to entering in wake flow always for grain spoil, can also be tight below froth bed if there is Coarse Coal grain to fall off from froth bed
Adjacent adverse current collision area is brought into froth bed by the bubble of rising, final froth bed overflow go out wide grade flotation column (D) at
For floatation clean coal (6), wake flow, which flows out wide grade flotation column (D), becomes floating tail-coal (7).
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| CN110882851B (en) * | 2019-12-11 | 2022-04-12 | 郑州大学 | Beneficiation system and beneficiation method for sulfide ore |
| CN111871619B (en) * | 2020-06-22 | 2021-11-23 | 中国矿业大学 | Pre-selection efficient size mixing equipment suitable for wide-size flotation |
| AU2021302770A1 (en) * | 2020-06-30 | 2023-02-09 | Metso Outotec Finland Oy | Froth-interaction flotation unit, mineral processing apparatus, and method |
| WO2022003242A1 (en) * | 2020-06-30 | 2022-01-06 | Metso Outotec Finland Oy | Flotation arrangement and method |
| CN112808466B (en) * | 2021-02-24 | 2022-09-27 | 北矿机电科技有限责任公司 | Coarse particle high-concentration flotation column |
| CN112934482B (en) * | 2021-03-16 | 2022-12-23 | 中国恩菲工程技术有限公司 | Flotation method and flotation device |
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