CN104069954B - A kind of Coal Flotation Column Process and method for sorting high-concentration ore slurry - Google Patents
A kind of Coal Flotation Column Process and method for sorting high-concentration ore slurry Download PDFInfo
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Abstract
A kind of Coal Flotation Column Process and method for sorting high-concentration ore slurry, the system it is main by feed pipeline, upper flotation column, lower flotation column, return pipeline, scan ore pulp circulation line and tailing tank is constituted.Method for separating is connected by the way that upper flotation column and lower flotation column are misplaced, ore pulp is squeezed into by feed pump and selects post into floating after upper bubble generator generator tube stream mineralising, the preferential emersion of the preferable material of floatability is discharged through concentrate hopper in upper flotation column, and the material for having not enough time to sorting is further sorted through the return pipeline that peristaltic pump is controlled into lower flotation column.Cause to enter the pulp density step-down of lower flotation column by the good material of the pre- emersion part floatability of upper flotation column, flotation column Pre-sorting in formation, the effect of lower flotation column intensified sorting, constitute segmentation flotation, can not be while the technical barrier for ensureing, farthest mitigates contaminated and tail coal race coal the phenomenon of cleaned coal so as to solve high-concentration ore slurry floatation clean coal product quality and clean coal recovery.
Description
Technical field
The present invention relates to a kind of Coal Flotation Column Process and method for sorting high-concentration ore slurry, it is particularly suited for high concentration coal slurry
Sorting, is also applied for the sorting of other mineral.
Background technology
Flotation of ore pulp equipment is mainly flotation device and the class of flotation column two.Flotation device mainly has agitation impeller flotator and spray
Penetrate formula flotation device.The deficiency of flotation device screening installation mainly has power consumption larger, serious wear, and bubble size is larger, point
Dissipate property not enough, while cell body is shallower, secondary enrichment is weaker, sorting superfine particle material effect is poor.The development of flotation column by
Traditional filling medium flotation column develops into the flotation column with aerated device and new construction, wherein more representational be
Rotational flow microbubble flotation column.
Rotational flow microbubble flotation column sorting region includes three parts：Selected section, roughing section, scan section.Ore pulp is high from cylinder
Fed at the 2/3 of degree, mine tailing is discharged from section underflow opening is scanned.Microvesicle generators are a cylinder external device (ED)s, former using jet
Reason, air is sucked while negative pressure is formed in chamber, and separates out a large amount of microvesicles by pressure differential, into scanning section.In eddy flow power
And buoyancy in the presence of, the gas-solid floc sedimentation of microvesicle and mineralising is to eddy flow center and is moved into roughing section upwards.Float
Microvesicle and pan feeding ore pulp countercurrent movement, both are contacted, collide, mineralising, and hydrophobicity ore particle is adhered to microvesicle and risen, hydrophily ore particle
Fail mineralising into section is scanned, thus realize the high selectivity sorting of flotation column.The groundwork for scanning section is to scan future
And mineralising cleaned coal, so as to improve clean coal recovery.The centrifugal force field for scanning section simultaneously also accelerates bubble in cylinder radially
Dispersion on section, bubble being more evenly distributed in cylinder, is conducive to the mineralising of bubble and mineral grain.Make in the eddy flow field of force
Under, circulation chats is separated by density variation, and low-density product is moved and be upwardly into flotation section toward section middle part is scanned, most
Floating afterwards turns into head coal product, and high density product is moved downward scanning a section outer, finally turns into flotation tail by underflow opening discharge
Coal.
As the development of China's coal preparation technology, dense-medium separation technology are advantageous because of its treatment difficult separation coal, start in coal separation
Occupy an leading position.But the pulverization of dense medium cyclone causes the secondary slime in washing process big containing quantitative change, in addition its consumption
Water is less compared to Jigging process, and the slime water flow for easily causing coal preparation plant is too high, can typically reach 120g/L or so, or even
It is higher.And the concentration of China's coal slime flotation should be typically controlled within 100g/L, the optimal sorting concentration of flotation column is 50-80g/
L.Meanwhile, the use of China's coarse grain slime recovery equipment so that enter flotation slime size it is thinner, can typically reach 0.3mm with
Under.The slime size of flotation is thinner, and the pulp density of suitable sorting is lower.These all cause very big tired to high-concentration ore slurry flotation
Difficulty, can not simultaneously ensure cleans ash and clean coal recovery during flotation.Therefore, ore pulp of the concentration more than 80g/L, it is believed that be high
Concentration.If the flotation of high-concentration ore slurry can be solved, can not only ensure product yield and quality, moreover it is possible to improve delivering dry coal slurry treatment
Amount, mitigates the burden of follow-up press filtration operation.
The structure of flotation device multicell series connection is used for reference, there is scholar to propose series connection Coal Flotation Column Process, two flotation columns are connected
Get up to process high-concentration ore slurry and improve flotation column and enter floating upper size boundary.But this has required two sets of flotation column equipment, take up an area face
Product is big, and two systems can not make full use of simultaneously.For high-concentration ore slurry, there is scholar to propose at flotation column internally feeding
Plus reflection sulculus, select the good material of part floatability in priority floating.It was verified that the flotation column can improve floating to a certain extent
Effect is selected, but the arrangement of sulculus is more difficult, and ore pulp can be disturbed to flow.
For the phenomenon that slime separation pulp density now is big, ash thin mud content high is big, there is scholar to propose multi-product and float
The concept of post is selected, it is more typical to have three product flotation columns, let out back particle using froth zone and individually discharge, it is to avoid intermediate products are repeatedly
Circulation, alleviates the too high phenomenon of cleans ash of the head coal product caused by entrainment.It is contemplated that when pulp density is big, due to
Mineralising is not enough and the sorting time insufficient cleaned coal entrainment for causing runs coal phenomenon, the disposal ability of multi-product flotation column with tail coal
It is limited, it is impossible to fully to allow material mineralising and allowing not sort ore pulp and circulate and select again.
The content of the invention
Technical problem：The purpose of the present invention is to overcome the deficiencies in the prior art, there is provided a kind of simple structure, operation
It is convenient, effective to solve the problems, such as Coal Flotation Column Process and method that cleaned coal entrainment and tail coal run the sorting high-concentration ore slurry of coal.
Technical scheme：The Coal Flotation Column Process of sorting high-concentration ore slurry of the invention, including upper flotation column, lower flotation column, under
The bridge piece connected with upper flotation column middle part is provided with the top of flotation column, concentrate hopper, concentrate hopper are connected with above upper flotation column
On be furnished with spray water system, be provided with lower flotation column feeding mouth in the middle part of lower flotation column, lower flotation rod structure is rotational flow microbubble flotation
Post, stabilier conically shaped is sequentially provided with from lower flotation column feeding mouth is internal downwards, and conically shaped top forms post flotation cell, bottom shape
Into rotational flow sorting room, lower flotation column eddy flow section outer wall order is connected with circulating pump, lower pressure gauge, bubble generator and is back to lower flotation
Post, lower flotation column bottom is connected to tailing tank through debris tube, and highly freely adjustable, the formation linker structure of tailing tank is described
Upper flotation column bottom be provided with flotation column feeding mouth, the underflow opening of upper flotation column is through feed back pipe and lower flotation column feeding mouth phase
Even, the underflow opening of described upper flotation column is externally provided with the size of controllable feed back amount and the peristaltic pump of feed back speed；The floating
Post feeding mouth is selected to be connected with upper bubble generator, upper pressure gauge, feed pump and mineral slurry mixer in turn through feeding pipe connection.
The method of the sorting high-concentration ore slurry of Coal Flotation Column Process, comprises the following steps described in a kind of usage right requirement 1：
A. after ore pulp pan feeding is stirred through mineral slurry mixer, feeding pipe is pumped into by feed pump, ore pulp is pre- in feeding pipe
After first mineralising, then fed in upper flotation column through upper bubble generator, flowed into through feed back pipe into the ore pulp in upper flotation column and floated downward
Post is selected, after lower flotation column is full of ore pulp, open the circulation pump, the preferable drainage material of floatability can be by concentrate hopper in upper flotation column
Discharge in advance, the ore pulp for having not enough time to sorting is discharged by after peristaltic pump treatment, lower flotation being back to by feed back pipe from underflow opening
Post carries out conventional rotational flow microbubble flotation column sorting；
B. after entering the advance flotation of upper flotation column, pulp density is decreased, and material is settled downwards, in bubble generator
Pressure under, produce a large amount of micro-bubbles, make ore pulp with bubble because move toward one another occurs adverse current collision mineralising, in lower flotation column not
Sorting material is attached on bubble and rises to upper flotation column as mineral laden bubble, the part not fallen off enter concentrate hopper discharge with it is upper
The pre- floating concentrate synthesis final concentrate of flotation column, the unsorted ore pulp suction circulating pump for coming off is returned to through bubble generator to be floated downward
The eddy flow section of post is selected, generator tube stream mineralising and eddy flow mineralising in this partial material way continue to sort, wherein dredging in the eddy flow field of force
Water material can be floated and enter concentrate, and hydrophilic material is discharged through tailing tank by debris tube as mine tailing；
C. by the material of lower flotation column emersion due to sorting time insufficient material for causing entrainment portions floatability poor
Float together, what this partial material had directly sheds into mine tailing in uphill process, what is had then enters upper flotation column, through secondary
After enrichment, the peristaltic pump connected by upper flotation column underflow opening is processed, and is back to again in lower flotation column through feed back pipe and is continued to follow
Ring is sorted, as true tailings discharge.
Beneficial effect：Concentrate product quality and concentrate of the present invention for the sorting high-concentration ore slurry in existing flotation technology
The technical barrier that the rate of recovery can not ensure simultaneously, flotation column, series connection flotation, reinforcing mineralising and eddy flow field of force sorting is organic
With reference to the inner link of surface nature and density variation according to material makes material exist by the pre- mineralization of pan feeding pipeline
The upper pre- preferable material of emersion floatability of flotation column, while the pulp density of the pan feeding of lower flotation column is reduced, using lower flotation column
Intensified sorting is sorted again, two sections of sortings are formed, final floating product is obtained, and solves traditional rotational flow microbubble flotation column to highly concentrated
The problem of the big ore pulp separating effect difference of degree, thin mud content.Compared with prior art, have the following advantages that：
1., by sorting mode that is pre- floating plus selecting again, efficiently solve that flotation is too high to pulp density, thin mud content is big
The technical barrier of slime separation effect difference.The good material of floatability is floatingly selected in advance through upper flotation column, reduces lower flotation column pan feeding
Concentration, then by the intensified sorting of lower flotation column, it is ensured that the head coal product rate of recovery, to reduce and run coal phenomenon in tail coal.
2. by the way of upper flotation column and the dislocation connection of lower flotation column, hydrophilic granules can be increased in floating-upward process
Come off distance, can both be come off in column body, can also be come off in lower prop, it is to avoid interfering between product.Two sections simultaneously
After cylinder dislocation, by the return pipeline of upper flotation column bottom, unsorted ore pulp is conducive to be returned to down by upper flotation column again
Flotation column continues to sort, and ore pulp can be avoided excessive in the ore pulp treating capacity that lower flotation column direct circulation causes, lower flotation column
Disposal ability is not enough, causes the material for having not enough time to sorting directly to be discharged by tailing tank, causes to run coal phenomenon.So circulate bonus point
The mode of section sorting not only ensures product quality, also increases the treating capacity of flotation column, that is, the root for processing high-concentration ore slurry
This reason.Compared to traditional flotation column, the Coal Flotation Column Process can reduce height of column；Compared to series connection flotation column, the Coal Flotation Column Process
Horizontal space can be saved, factory building arrangement space is saved, capital expenditure is reduced.
3. by the regulation of the pre- mineralising feed pressure of upper flotation column, pre- mineralization degree can be controlled, so as to control to float
Select the pre- float doses of post.This is just avoided that only the excessive sorting ore pulp environment for causing of flotation column circulating pressure is unstable on the lower, gas
Bubble annexs the serious phenomenon that vanishes, and can avoid the too small flotation pulp gas holdup for causing of lower flotation column circulating pressure too small again, draws
The insufficient phenomenon of flotation for rising.After upper flotation column staggers simultaneously, be conducive to the feed back of ore pulp, the secondary enrichment for strengthening froth bed is made
With feed back amount can flexibly be controlled by peristaltic pump through return pipeline.
Brief description of the drawings
Fig. 1 is high-concentration ore slurry flotation column system schematic of the invention.
In figure：Mineral slurry mixer -1, feed pump -2, upper pressure gauge -3, upper bubble generator -4, concentrate hopper -5, on
Flotation column -6, bridge piece -7, lower flotation column -8, peristaltic pump -9, conically shaped -10, stabilier -11, circulating pump -12,
Lower pressure gauge -13, bubble generator -14, debris tube -15, tailing tank -16, upper flotation column feeding mouth -17, lower flotation
Post feeding mouth -18, spray header -19, feeding pipe -20, feed back pipe -21.
Specific embodiment
One embodiment of the present of invention is further described below in conjunction with the accompanying drawings：
As shown in figure 1, the Coal Flotation Column Process of sorting high-concentration ore slurry of the invention, mainly by upper flotation column 6, lower flotation column
8th, peristaltic pump 9, charging gear, foam device are constituted, and described charging gear includes mineral slurry mixer 1, feed pump 2, upper pressure
Table 3 and upper bubble generator 4, are sequentially connected through feeding pipe 20.Pan feeding is linked in sequence feed pump 2, pressure gauge from mineral slurry mixer 1
3rd, connected with upper flotation column 6 after bubble generator 4.The lower structure of flotation column 8 is rotational flow microbubble flotation column, from lower flotation column feeding mouth
18 downward inside are sequentially provided with the conically shaped 10 of stabilier 11, and the top of conically shaped 10 forms post flotation cell, bottom and forms rotational flow sorting
Room, the lower eddy flow of flotation column 8 section outer wall order is connected with circulating pump 12, lower pressure gauge 13, bubble generator 14 and is back to lower flotation column
8, the lower bottom of flotation column 8 is connected to tailing tank 16, highly freely adjustable, the formation linker knot of tailing tank 16 through debris tube 15
Structure, controls mineral pulp level.Described foam device includes conically shaped 10, stabilier 11, circulating pump 12, lower pressure gauge 13, lower gas
Bubble generator 14, conically shaped 10 is located at the bottom of lower flotation column 8, and stabilier 11 is located at the top of conically shaped 10, circulating pump 12, lower pressure
Table 13, bubble generator 14 are contacted by the road, the entrance one end of circulating pump 12 be located at the outer surface of conically shaped 10 lower flotation
The outlet of post 8 is connected, and the exit end of bubble generator 14 is connected with the entrance of lower flotation column 8 positioned at the bottom of conically shaped 10.Institute
The top of the lower flotation column 8 stated is provided with the bridge piece 7 connected with the middle part of upper flotation column 6, and the top of upper flotation column 6 is connected with concentrate
Groove 5, is furnished with spray water system 19 on concentrate hopper 5, the middle part of lower flotation column 8 is provided with lower flotation column feeding mouth 18, lower flotation column 8
Bottom is provided with foam device, and bottom is connected with the tailing tank 16 of adjustable flotation fluid height, described upper flotation column 6 through debris tube 15
Bottom is provided with flotation column feeding mouth 17, and the underflow opening of upper flotation column 6 is connected through feed back pipe 21 with lower flotation column feeding mouth 18, institute
The underflow opening of the upper flotation column 6 stated is externally provided with the size of controllable feed back amount and the peristaltic pump 9 of feed back speed, under upper flotation column 6
The peristaltic pump 9 of side flow to lower flotation column feeding mouth 18 through feed back pipe 21.The upper flotation column feeding mouth 17 is connected through feeding pipe 20
It is connected with bubble generator 4, upper pressure gauge 3, feed pump 2 and mineral slurry mixer 1 in turn.
The method of sorting high-concentration ore slurry of the invention, comprises the following steps that：
1. ore pulp and floating agent are added into mineral slurry mixer 1 together, after being sufficiently stirred for, by feed pump 2, upper pressure gauge
3rd, upper bubble generator 4 feeds flotation column 6, generator tube stream mineralization when this fraction pulp is by feeding pipe 20, by upper
The valve of pressure gauge 3 can control the degree of mineralising, and the pressure reflection for passing through upper pressure gauge 3；
2. by advance mineralising material enter upper flotation column 6 after, rapidly by feed back pipe 21 enter lower flotation column 8, treat into
Material opens circulating pump 12 and feed back peristaltic pump 9 full of after lower flotation column 8, and circulating pressure is returned by the valve regulated of lower pressure gauge 13
Doses can distinguish reading by the rotational speed regulation of peristaltic pump 9；The preferable drainage material of floatability can be by concentrate in upper flotation column 6
Groove 5 is discharged in advance, and the ore pulp for having not enough time to sorting is discharged by after the treatment of peristaltic pump 9, being back to by feed back pipe 21 from underflow opening
Lower flotation column 8 carries out conventional rotational flow microbubble flotation column sorting；Liquid level in lower flotation column 8 can by the Height Adjustment of tailing tank 16,
Liquid level takes the circumstances into consideration lifting according to the size of ore pulp capacity of returns and the flooding velocity of concentrate；When concentrate and tailings is discharged respectively,
The sorting environment of stabilization can be formed；
3. after the ore pulp after pipe stream mineralising enters upper flotation column 6, pulp density is decreased, and material is settled downwards,
Under the pressure of bubble generator 14, a large amount of micro-bubbles are produced, ore pulp is collided because move toward one another occurs adverse current with bubble
Mineralising, bubble and material collide adhesion, the preferable material of hydrophobic floatability, into concentrate froth bed, through essence after enrichment
Ore deposit groove 5 is discharged, and the material for not completing mineralising then drops to outlet at bottom and controls to enter lower flotation by feed back pipe 21 through peristaltic pump 9
Post 8；In this process, the good drainage material of floatability realizes that relative quiescent is separated with non-mineralising material, realizes static prefloat, together
When cause the pulp density into lower flotation column 8 also because the reduction of dry doses decreases；
4. the ore pulp for entering lower flotation column 8 continues adverse current collision mineralising, non-sorting material in the flotation of lower flotation column 8 section
It is attached on bubble and rises as mineral laden bubble, the good material of floatability then under the Float upward function of bubble, is carried into floating
The froth zone of post 6 is selected, secondary enrichment is continued to complete, most discharged through concentrate hopper 5 afterwards；Remaining more difficult floating material enters eddy flow
Section, by centrifugal force and the continuation pipe stream mineralization of circulation pump conduit；
5. enter the material of eddy flow section, scanned again by eddy flow section, this part has material in ore pulp by circulating pump
12 extract out after after it there is stronger pipe stream mineralization in bubble generator 14, by tangent line inject rotational flow sorting section, from
In the presence of mental and physical efforts, drainage material enters overflow, is entered by conically shaped 10 and floats up to concentrate hopper 5, and hydrophilic material is then along post jamb
Slide to bottom and discharged by tailing tank 16 through debris tube 15, as true tailings；Lower pressure gauge 13 therein is used to measure circulation
Pressure value, bubble generator 14 provides suitable small because suction function is from air is sucked entirely to descend flotation column 8 to sort
Bubble, and there is mineralization with the high-speed jet near nozzle, realize scanning；
6. it is all in lower flotation column 8 float concentrate, in floating-upward process, hydrophobic granule can come off because of Action of Gravity Field,
Also may proceed to secondary enrichment after into upper flotation column 6, the particle of discharge part entrainment；Finally, the concentrate of upper flotation column 6
Concentrate hopper 5 with the concentrate of lower flotation column 8 all from the top of upper flotation column 6 is discharged, and synthesizes final concentrate.
Claims (2)
1. a kind of Coal Flotation Column Process for sorting high-concentration ore slurry, including upper flotation column（6）, lower flotation column（8）, lower flotation column（8）
Top be provided with and upper flotation column（6）The bridge piece of middle part connection（7）, upper flotation column（6）Top be connected with concentrate hopper（5）,
Concentrate hopper（5）On be furnished with spray water system（19）, lower flotation column（8）Middle part be provided with lower flotation column feeding mouth（18）, lower flotation
Post（8）Structure is rotational flow microbubble flotation column, from lower flotation column feeding mouth（18）It is internal downwards to be sequentially provided with stabilier（11）, taper
Cylinder（10）, conically shaped（10）Top forms post flotation cell, bottom and forms rotational flow sorting room, lower flotation column（8）Eddy flow section outer wall is suitable
Sequence is connected with circulating pump（12）, lower pressure gauge（13）, bubble generator（14）It is back to lower flotation column（8）, lower flotation column（8）Bottom
Through debris tube（15）It is connected to tailing tank（16）, tailing tank（16）It is highly freely adjustable, form linker structure, its feature exists
In：Described upper flotation column（6）Bottom is provided with flotation column feeding mouth（17）, upper flotation column（6）Underflow opening through feed back pipe
（21）With lower flotation column feeding mouth（18）It is connected, described upper flotation column（6）Underflow opening be externally provided with the big of controllable feed back amount
The peristaltic pump of small and feed back speed（9）；The upper flotation column feeding mouth（17）Through feeding pipe（20）Connection is connected with gas in turn
Bubble generator（4）, upper pressure gauge（3）, feed pump（2）And mineral slurry mixer（1）.
2. a kind of method that usage right requires the sorting high-concentration ore slurry of Coal Flotation Column Process described in 1, it is characterised in that including such as
Lower step：
A. by ore pulp pan feeding through mineral slurry mixer（1）After stirring, by feed pump（2）Pump into feeding pipe（20）, ore pulp is in pan feeding
In pipe after advance mineralising, then through upper bubble generator（4）Feed flotation column（6）It is interior, enter upper by the material of advance mineralising
Flotation column（6）Afterwards, rapidly by feed back pipe（21）Into lower flotation column（8）, after lower flotation column is full of ore pulp, open the circulation pump
（12）With feed back peristaltic pump（9）, circulating pressure is by lower pressure gauge（13）Valve regulated, feed back amount passes through peristaltic pump（9）Rotating speed
Regulation, and reading can be distinguished；Upper flotation column（6）The interior preferable drainage material of floatability is by concentrate hopper（5）Discharge in advance, following
And the ore pulp of sorting is discharged by peristaltic pump from underflow opening（9）After treatment, by feed back pipe（21）It is back to lower flotation column（8）Carry out
Conventional rotational flow microbubble flotation column sorting；Lower flotation column（8）Interior liquid level passes through tailing tank（16）Height Adjustment, liquid level according to
The size of ore pulp capacity of returns and the flooding velocity of concentrate take the circumstances into consideration lifting；When concentrate and tailings is discharged respectively, that is, form stabilization
Sorting environment；
B. upper flotation column is entered（6）After advance flotation, pulp density is decreased, and material is settled downwards, in bubble generator
（14）Pressure under, produce a large amount of micro-bubbles, make ore pulp with bubble because move toward one another occurs adverse current collision mineralising, lower flotation column
（8）Inside non-sorting material is attached on bubble and rises to upper flotation column as mineral laden bubble（6）, the part not fallen off enters concentrate
Groove（5）Discharge and upper flotation column（6）Pre- floating concentrate synthesis final concentrate, the unsorted ore pulp for coming off is pumped into circulating pump（12）Through
Bubble generator（14）Return to lower flotation column（8）Eddy flow section, into eddy flow section material, by eddy flow section scan again,
There is material in ore pulp by circulating pump in this part（12）By bubble generator after extraction（14）There is stronger Guan Liukuang
After change effect, rotational flow sorting section is injected by tangent line, under the influence of centrifugal force, drainage material enters overflow, by conically shaped（10）
Into floating up to concentrate hopper（5）, hydrophilic material then slid to bottom through debris tube along post jamb（15）By tailing tank（16）Discharge,
As true tailings；Lower pressure gauge therein（13）For measuring circulating pressure value, bubble generator（14）Because negative pressure is made
It is entirely to descend flotation column with from suction air（8）Sorting provides suitable micro-bubble, and is sent out with the high-speed jet near nozzle
Raw mineralization, realizes scanning；
C. by lower flotation column（8）The material of emersion is due to sorting time insufficient material for causing entrainment portions floatability poor
Float together, what this partial material had directly sheds into mine tailing in uphill process, what is had then enters upper flotation column（6）, warp
After secondary enrichment, by upper flotation column（6）The peristaltic pump connected at underflow opening（9) process, through feed back pipe（21）It is back to down again
Flotation column（8）Sorting is inside continued cycling through, as true tailings discharge.
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| CN104668108A (en) * | 2014-12-29 | 2015-06-03 | 山东东山王楼煤矿有限公司 | Flotation device and method for coal slime |
| CN104801429A (en) * | 2015-04-03 | 2015-07-29 | 河南理工大学 | Combined type column floating selection system |
| ITUB20156822A1 (en) * | 2015-12-11 | 2017-06-11 | Paolo Bozzato | SYSTEM AND PROCEDURE FOR SEPARATION WITH FOAM |
| CN106984442B (en) * | 2017-05-15 | 2023-03-21 | 中国矿业大学 | Device and method for reducing high-ash fine mud pollution through multi-point combined aeration |
| WO2019014515A1 (en) | 2017-07-14 | 2019-01-17 | Vermeer Manufacturing Company | Hydro excavation vacuum apparatus |
| CN109731697B (en) * | 2019-03-14 | 2019-12-13 | 中国矿业大学 | Wide-size-fraction flotation system and process |
| CN110124873B (en) * | 2019-04-04 | 2024-02-02 | 太原睿孚特选煤技术有限公司 | Sectional type mechanical stirring forced mineralization flotation equipment |
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| US6073775A (en) * | 1999-01-19 | 2000-06-13 | Liu; Jiongtian | Cyclonic-static micro-bubble floatation apparatus and method |
| CN102716814B (en) * | 2012-06-26 | 2014-08-20 | 中国矿业大学 | Novel flotation column serial connection test system for improving flotation granularity upper limit |
| CN103480502B (en) * | 2013-09-10 | 2016-01-20 | 中国矿业大学 | Three-product cyclone microbubble floatation column screening installation and method |
| CN103480503B (en) * | 2013-09-10 | 2015-03-25 | 中国矿业大学 | Settling cyclonic micro-bubble flotation column separation unit and method |
| CN203916916U (en) * | 2014-06-25 | 2014-11-05 | 中国矿业大学 | A kind of Coal Flotation Column Process of sorting high-concentration ore slurry |
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