CN110201790A - A kind of the sorting recovery system and sorting recovery process of width grade coal slime - Google Patents
A kind of the sorting recovery system and sorting recovery process of width grade coal slime Download PDFInfo
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- CN110201790A CN110201790A CN201910542636.1A CN201910542636A CN110201790A CN 110201790 A CN110201790 A CN 110201790A CN 201910542636 A CN201910542636 A CN 201910542636A CN 110201790 A CN110201790 A CN 110201790A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
- B03B9/005—General arrangement of separating plant, e.g. flow sheets specially adapted for coal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/001—Flotation agents
- B03D1/004—Organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/02—Froth-flotation processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D1/00—Flotation
- B03D1/14—Flotation machines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
- B03D2201/00—Specified effects produced by the flotation agents
- B03D2201/02—Collectors
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Abstract
The present invention relates to a kind of sorting recovery system of wide grade coal slime and sorting recovery process, belong to coal separation processing technique field, solve the problems, such as in the prior art wide grade coal slime sorting process process complexity, Gao Chengben, high energy consumption, cause damages to environment.It sorts recovery system and is equipped with agitator, hydraulic flotation machine, three-product cyclone classifying screen, ore pulp preprocessor and flotation column along sorting pipeline；It is equipped with the first buffer barrel between hydraulic flotation machine and three-product cyclone classifying screen, the second buffer barrel is equipped between three-product cyclone classifying screen and ore pulp preprocessor, ore pulp preprocessor is connect with flotation column.The sorting recovery process includes the following steps: that will enter float coal mud feeds in agitator, and stirring is tuned into ore pulp, feeds hydraulic flotation machine；It is classified for the first time；Coarse-grain coarse ore concentrate, aid for Micro-fine Coal Slurry Dewatering and the classification of fine grained coal slime；The accurate sorting of fine grained coal slime.The present invention realizes the continuity slime separation of wide grade, short route.
Description
Technical field
The present invention relates to the sorting recovery system of coal separation processing technique field more particularly to a kind of wide grade coal slime and
Sort recovery process.
Background technique
Main energy sources of the coal as China are made that tremendous contribution for national economy and social development.Due to coal benefit
It is not resolved still with the problems such as mode is extensive, efficiency is low, pollution is heavy, secondary resource is made a low multiple use, following China
Dissertation of Development of Coal Industry is by the serious restriction further by resource and environment.Therefore, horizontal by promoting coal separation, realize coal
Charcoal clean and effective utilizes and energy-saving and emission-reduction, guarantees the sustainable development of coal industry under the new normality of China's economic development.Coal point
Choosing processing is the source and basis of clean coal technology, is to remove objectionable impurities in coal using machining or physico-chemical process,
The quality for improving coal, up-to-standard product is provided for different user, to realize that Coal Clean efficiently utilizes.
As the fast development and the application of heavy media coal separation technology, coal slurry content of mechanical coal mining significantly increase,
And the features such as miniaturization, high ash content, big intergrowth content is presented in coal slime, proposes requirements at the higher level to slime separation recycling.And it passes
Coal slime treatment process of uniting is complicated, and slime separation recycling ability is weak, fluctuates bad adaptability to coal quality, is often protected by sacrificing treating capacity
Product quality is demonstrate,proved, coal slime resource is caused to be largely lost.
Existing slime separation technique are as follows: 0-2mm enters float coal mud and carries out 0.25mm pre-classification by hydrocyclone,
0.25-2mm coarse granule coal slime often interferes bed sorting by TBS, and 0-0.25mm fine grained coal slime is returned by flotation device flotation column
It receives.It is restricted by hydroclone classification efficiency and is limited with slime separation technique low-level, often with thin in coarse granule slime separation
Mud entrainment, causes concentrate product contaminated, ash content is not up to standard；Coarse-grain coarse ore concentrate easily occurs with bubble de- in fine grained coal slime flotation
Attached, " running thick " phenomenon is serious, and cleaned coal loses in tailing, and tail coal ash content is low, calorific value is high, the coal quality wasting of resources.
It runs down in face of coal quality quality, the limited slime separation of current resources situation and processing capacity that coal slime yield is increasing
Contradiction between complex process needs to develop the strong slime separation technique of a kind of simple process, wide adaptability, processing capacity.It should
Technique is by the preparatory throwing tail by hydraulic flotation machine, and the fine fraction classification of three-product cyclone sieve and flotation column are to fine grain essence
The really technical advantages such as sorting simplify slime separation technique, realize the wide grade short route continuous gradient sorting of coal slime, avoid rough coal
The problems such as " running thick " is desorbed with the coarse granule during separation of fine slime in thin mud pollution in mud assorting room.
Summary of the invention
In view of above-mentioned analysis, the present invention is intended to provide a kind of sorting recovery system of width grade coal slime and sorting recycling work
Skill, to solve the problems, such as existing wide grade coal slime sorting process process complexity, Gao Chengben, high energy consumption, cause damages to environment.
The purpose of the present invention is mainly achieved through the following technical solutions:
On the one hand, the present invention provides a kind of sorting recovery system of wide grade coal slime, the sorting recovery system edges point
Pipeline is selected to be equipped with agitator, hydraulic flotation machine, three-product cyclone classifying screen, ore pulp preprocessor and flotation column；Agitator with
The first feed pump is equipped between hydraulic flotation machine；The lower part of hydraulic flotation machine is pyramidal structure, and the upper side of pyramidal structure is set
There is the fluidisation mouth of a river, the bottom of hydraulic flotation machine is equipped with underflow opening；The is equipped between hydraulic flotation machine and three-product cyclone classifying screen
One buffer barrel, the first buffer barrel are connect by the second feed pump with three-product cyclone classifying screen, three-product cyclone classifying screen and mine
It starches and is equipped with the second buffer barrel between preprocessor, the second buffer barrel is connect by third feed pump with ore pulp preprocessor, ore pulp
Preprocessor is connect with flotation column.
Further, the top of hydraulic flotation machine is equipped with feeding inlet, and feeding inlet is connect with the first feed pump, hydraulic flotation machine
Upper side is equipped with overflow port.
It further, further include circulating pump, circulating pump is connected by the fluidisation mouth of a river of microvesicle generators and hydraulic flotation motor spindle
It connects.
Further, the lower part of three-product cyclone classifying screen is pyramidal structure.
Further, three-product cyclone classifying screen is equipped with underflow opening and overflow port.
Further, it is additionally provided with feeding device, the feeding device is that the agitator is fed to coal slurry flotation.
On the other hand, the present invention also provides a kind of sorting recovery process of wide grade coal slime, the sorting recovery process
Include the following steps:
Step 1: will enter float coal mud and feed in agitator, enters float coal mud and water and collecting agent stirring is added to be tuned into agitator
Ore pulp feeds hydraulic flotation machine after mixing；
Clear water: being fed the fluidisation mouth of a river of hydraulic flotation motor spindle by microvesicle generators, is classified for the first time by step 2,
Coarse-grain coarse ore concentrate and fine grained coal slime in ore pulp are discharged by the overflow port of hydraulic flotation machine, into the first buffer barrel；Coarse granule coal
Spoil coarse grain in mud is discharged through hydraulic flotation machine underflow opening；
Step 3: in the first buffer barrel plus water feeds three-product cyclone classifying screen and is classified after mixing evenly, fine
Beans mud and fine grained coal slime enter the second buffer barrel, and coarse-grain coarse ore concentrate product is discharged by the underflow opening of three-product cyclone classifying screen；
Step 4: the ore pulp in the second buffer barrel completes preparatory mineralising, then feeds flotation column and carries out fine grained coal slime
Accurate sorting.
Further, in the step 2, when clear water passes through microvesicle generators, air and foaming agent are sucked.
Further, in the step 4 fine grained coal slime accurate sorting specific steps are as follows: fine particulate coal mud and flotation column
The bubble formation adverse current of interior rising, the good fine grained cleaned coal of surface hydrophobic collides with bubble to be sticked and floats, from flotation
Column upper end overflow launder collects discharge；The fine grained spoil of surface hydrophobic difference is discharged by flotation column bottom underflow opening.
Further, in the step 1, the collecting agent is the combination of one or both of kerosene, diesel oil.
Compared with prior art, the present invention one of at least has the advantages that:
A) the sorting recovery system of wide grade coal slime provided by the invention, by presetting hydraulic flotation machine, by gravity treatment
It is combined with flotation technology, realizes the continuous accurate sorting to coarse granule coal slime, coarse granule spoil shortens operation by preparatory discharge
Process improves system processing capacity；Second by the desliming classification of three-product cyclone classifying screen, coarse-grain coarse ore concentrate and thin are realized
Beans mud separates, and carries out raw material preparation for flotation operation, ensure that the continuity of slime separation process, decrease thin mud pair
The pollution of slime separation process；Using sorting recovery system of the invention, provided at the fluidisation mouth of a river of the bottom of hydraulic flotation machine
Water is fluidized, condition is provided for coarse granule flotation, improves flotation effect；Sorting recovery system structure of the invention is simple, low energy consumption,
It is environmentally protective, it is with a wide range of applications.
B) the sorting recovery process of wide grade coal slime provided by the invention uses hydraulic flotation machine first, by coarse granule spoil
It is discharged in advance, shortens work flow, improve system processing capacity；Second by the desliming point of three-product cyclone classifying screen
Grade, realization coarse-grain coarse ore concentrate are separated with fine grained coal slime, are carried out raw material preparation for flotation operation, be ensure that slime separation process
Continuity decreases pollution of the thin mud to slime separation process；In conjunction with the accurate sorting using flotation column to fine grained coal slime
Recycling ability realizes the wholegrain grade sorting recycling of coal slime from thick to thin.
C) present invention reduces coal slime in system using wide grade, the continuity slime separation recovery process of short route
Transportation route reduces coal slime and mutually wears with duct wall and coal slime itself during transportation, prevents coal slime overground, reduce simultaneously
Production cost realizes coal slime high efficient sorting；The gradient of coal slime sorts, and has been effectively relieved thin during separation of coarse slime
Coarse granule " desorption ", " running thick " problem during sludge-polluted and separation of fine slime；The sorting of wide grade coal slime of the invention is returned
Knock off skill, simple process, low energy consumption, does not cause damages to environment at low cost.
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 pass through institute in specification and attached drawing
It is achieved and obtained in the content particularly pointed out.
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 sorting recovery system structural schematic diagram of wide grade coal slime in embodiment one；
Fig. 2 is that recovery process flow diagram is sorted in embodiment two.
Appended drawing reference:
1- agitator；The first feed pump of 2-；3- circulating pump；4- microvesicle generators；5- hydraulic flotation machine；6- first is buffered
Bucket；The second feed pump of 7-；8- three-product cyclone classifying screen；The second buffer barrel of 9-；10- third feed pump；The pretreatment of 11- ore pulp
Device；12- flotation column；A- enters float coal mud；B- clear water；C- air；D- coarse grain tailing；E- coarse-grain coarse ore concentrate；F- aid for Micro-fine Coal Slurry Dewatering；G- is thin
Grain tailing；H- fine concentrate.
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.
Embodiment one
A specific embodiment of the invention, as shown in Figure 1, a kind of sorting recovery system of wide grade coal slime is disclosed,
Agitator 1, hydraulic flotation machine 5, three-product cyclone classifying screen 8, ore pulp preprocessor 11 and flotation column are equipped with along sorting pipeline
12；The first feed pump 2 is equipped between agitator 1 and hydraulic flotation machine 5；The top of hydraulic flotation machine 5 is equipped with feeding inlet, feeding inlet
It is connect with the first feed pump 2, the upper side of hydraulic flotation machine 5 is equipped with overflow port, and the lower part of hydraulic flotation machine 5 is taper knot
Structure, the upper side of pyramidal structure are equipped with the fluidisation mouth of a river, and the bottom of hydraulic flotation machine 5 is equipped with underflow opening；Hydraulic flotation machine 5 and three
The first buffer barrel 6 is equipped between product cyclone classification sieve 8, the first buffer barrel 6 is classified by the second feed pump 7 with three-product cyclone
8 connection of sieve, is equipped with the second buffer barrel 9, the second buffer barrel 9 passes through between three-product cyclone classifying screen 8 and ore pulp preprocessor 11
Third feed pump 10 is connect with the bottom of ore pulp preprocessor 11, and ore pulp preprocessor 11 is connect with flotation column 12.
Specifically, the lower part of hydraulic flotation machine 5 is pyramidal structure, the upper side of pyramidal structure is equipped with the fluidisation mouth of a river, clearly
Water b feeds the fluidisation mouth of a river of 5 bottom of hydraulic flotation machine, the fluidisation mouth of a river of circulating pump 3 and 5 bottom of hydraulic flotation machine through circulating pump 3
Between be equipped with microvesicle generators 4.Underflow ore pulp can be concentrated in the pyramidal structure of 5 lower part of hydraulic flotation machine, play certain dehydration
Effect, when implementation, ore pulp feeds hydraulic flotation machine from top, is sorted in the ascending current for being clipped in bubble, spoil particle
Density is big and the poor adherency that do not collide with bubble of surface hydrophobic, so cannot be under the effect of the ascending current of entrained air bubbles on
It is floating to become overflow, hydraulic flotation motor spindle pyramidal structure can only be sunk to as underflow, as the whereabouts of ore pulp deposits, pyramidal structure
The ore pulp at the ore pulp on top continuous crush cones bottom under the effect of gravity；The design of pyramidal structure, from top to bottom cross-sectional area by
It is decrescence small, so that the extruded pressure of ore pulp is gradually increased from top to bottom, particulate interspaces moisture is reduced, underflow is played certain dense
Contracting effect.
Specifically, third feed pump 10 is connect with the bottom of ore pulp preprocessor 11, ore pulp preprocessor by bottom feed,
It is stirred by internal impeller, carry out gas-liquid-solid three-phase is sufficiently stirred contact, completes preparatory mineralising, finally passes through pipe by top
Road flows into flotation column 12.
Specifically, the lower part of three-product cyclone classifying screen 8 is pyramidal structure, three-product cyclone classifying screen 8 is equipped with and can arrange
The overflow port of the underflow opening of highdensity coarse-grain coarse ore concentrate product and the fine grained coal slime that low-density can be discharged out.
Specifically, the sorting recovery system of wide grade coal slime, is additionally provided with feeding device, feeding device is the infeed of agitator 1
Enter float coal mud.
When implementation, feeding device will enter float coal mud and feed in agitator 1, add water to be stirred and size mixing, according to coal characteristics
A certain amount of collecting agent is added, it is after mixing evenly, stable by pulp conveying to hydraulic flotation by 2 continuous uniform of the first feed pump
5 upper feeding mouth of machine；Clear water b feeds the stream of 5 bottom of hydraulic flotation machine through circulating pump 3 with certain pressure by microvesicle generators 4
Change the mouth of a river, when clear water b passes through microvesicle generators 4, will form the negative pressuren zone of certain area, suck air c and a certain amount of
Infusion；After clear water b feeds hydraulic flotation machine 5, air is precipitated with the reduction of pressure, with water flow from 5 bottom of hydraulic flotation machine
Rise, interference is completed in the fluidization water flow that the coarse granule coal slime in ore pulp rises in hydraulic flotation machine 5 and is settled, and collecting agent
Addition improve the hydrophobic difference in coarse granule coal slime between coarse-grain coarse ore concentrate surface and spoil, the good coarse-grain coarse ore concentrate of hydrophobicity with
The bubble that is mingled with collides absorption in fluidisation water, and hydrophilic spoil is not adsorbed with bubble；The absorption of bubble reduces
The apparent density of coarse-grain coarse ore concentrate expands the density variation between coarse-grain coarse ore concentrate and spoil, floats convenient for coarse-grain coarse ore concentrate；Coarse-grain coarse ore concentrate
It is discharged with ascending current by the overflow port of hydraulic flotation machine 5 with fine grained coal slime, into the first buffer barrel 6；Cash in coarse granule
Masonry is that coarse grain tailing d sinks to 5 bottom of hydraulic flotation machine, is discharged through 5 underflow opening of hydraulic flotation machine, through pipeline to thickener
Carry out subsequent dewatering operation.It using hydraulic flotation machine 5, is combined by gravity treatment and flotation technology, product from failing is through hydraulic flotation
The underflow opening of machine 5 is discharged, and flotation concentrate is collected through the overflow port of hydraulic flotation machine 5, to realize to the continuous of coarse granule coal slime
Accurate sorting, coarse granule spoil shorten work flow by preparatory discharge, improve system processing capacity.
In first buffer barrel 6 plus suitable quantity of water feeds the rotation of three products through the second feed pump 7 after mixing evenly along a tangential direction
Classifying screen 8 is flowed, ore pulp forms eddy flow in three-product cyclone classifying screen 8 and moves downward.The ore pulp moved downward is revolved by three products
The dissection of grating in 8 side wall of classifying screen is flowed, the aid for Micro-fine Coal Slurry Dewatering f that sieve pore is less than in ore pulp is discharged by sieve pore, thick on sieve
Grain concentrate continues to move downward to form contour stealth and be arranged as coarse-grain coarse ore concentrate e by 8 underflow opening of three-product cyclone classifying screen with ore pulp
Out；Fine grained coal slime progressively disengages contour stealth with suffered being gradually increased for resistance with pulp flow to conical section on sieve, is formed
Inward eddy from bottom to top, by three-product cyclone classifying screen 8 with sieve overflow port be discharged, together with aid for Micro-fine Coal Slurry Dewatering f into
Entering the second buffer barrel 9, it is contemplated that aid for Micro-fine Coal Slurry Dewatering ash content is relatively high, and granularity is small, poor selectivity, when work on the spot load is big,
Aid for Micro-fine Coal Slurry Dewatering can be carried out to shunt regulating, improve product quality；By the desliming classification of three-product cyclone sieve, coarse grain essence is realized
Mine is separated with fine grained coal slime, is carried out raw material preparation for flotation operation, be ensure that the continuity of slime separation process, also reduce
Pollution of the thin mud to slime separation process.
Ore pulp in second buffer barrel 9 adds suitable quantity of water, after mixing evenly, by the confession that 10 continuous uniform of third feed pump is stable
Enter ore pulp preprocessor 11, ore pulp dosing stirring in ore pulp preprocessor 11 completes preparatory mineralising, then uniformly feeds flotation
The accurate sorting of the progress fine grained coal slime of column 12.
Compared with prior art, the sorting recovery system of wide grade coal slime provided in this embodiment, by presetting water
Power flotation device, gravity treatment and flotation technology are combined, and realize the continuous accurate sorting to coarse granule coal slime, and spoil is discharged in advance
Shorten work flow, improves system processing capacity；Second by the desliming classification of three-product cyclone classifying screen, coarse grain essence is realized
Mine is separated with fine grained coal slime, is carried out raw material preparation for flotation operation, be ensure that the continuity of slime separation process, also reduce
Pollution of the thin mud to slime separation process；Using sorting recovery system provided in this embodiment, in the bottom of hydraulic flotation machine
The fluidisation mouth of a river fluidisation water is provided, provide condition for coarse granule flotation, raising flotation effect.Sorting recovery system knot of the invention
Structure is simple, and low energy consumption, environmentally protective, is with a wide range of applications.
Embodiment two
A specific embodiment of the invention, as shown in Fig. 2, a kind of sorting recovery process of wide grade coal slime is disclosed,
The device provided using such as embodiment 1, sorting recovery process are included the following steps:
Step 1: will enter float coal mud a and feed in agitator, enters float coal mud and water and collecting agent stirring is added to be tuned into agitator
Ore pulp, after mixing, through the infeed hydraulic flotation machine that the first feed pump continuous uniform is stable；
Preferably, the pulp density in step 1 is 400-600g/L.Pulp density is too low, and treating capacity is too low, and medicament disappears
Consumption is big, high production cost；Pulp density is too high, and intergranular resistance also increases, and is unfavorable for the progress of interference sedimentation, high density
Spoil particle is easily mixed into low-density cleaned coal, and then increases cleans ash, deteriorates separating effect.Therefore, pulp density is set to 400-
600g/L, such as 500g/L.
Preferably, the collecting agent in step 1 is one of kerosene, diesel oil or other coal separation collecting agents or a variety of groups
Close, collecting agent can be improved the hydrophobic difference in coarse granular material between cleaned coal surface and spoil, adsorption of collector on coal surface,
Coal surface hydrophobic is improved, bubble is easy to be adsorbed on the good cleaned coal surface of hydrophobicity, provides premise for coarse granule sorting.
Step 2: clear water b is fed to the stream of hydraulic flotation motor spindle through circulating pump with certain pressure by microvesicle generators
Change the mouth of a river, when clear water b passes through microvesicle generators, will form the negative pressuren zone of certain area, suck air c and a certain amount of blistering
Agent；Coarse granule coal slime in ore pulp completes interference sedimentation in hydraulic flotation machine, and coarse-grain coarse ore concentrate is floated with fine grained coal slime by waterpower
The overflow port of machine is selected to be discharged, into the first buffer barrel；Spoil coarse grain in coarse granule coal slime sinks to waterpower as coarse grain tailing d and floats
Motor spindle is selected, is discharged through hydraulic flotation machine underflow opening.
Specifically, the foaming agent in step 2 is one of sec-octyl alcohol, MIBC or other types surfactant or more
Kind combination, foaming agent can reduce bubble interface tension, conducive to the formation of microvesicle；Bubble stability is improved, bubble merging is reduced,
Conducive to the dispersion of bubble, increase gas holdup.Selective absorption occurs for microvesicle and coarse-grain coarse ore concentrate, reduces coarse-grain coarse ore concentrate apparent density,
It is poor to increase the apparent density between thick spoil particle, raising separating effect.
Specifically, the amount of the foaming agent in step 2 is 200-550g/t, such as 200g/t；When the amount of foaming agent is very few,
Bubble stability is poor, and gas holdup is low, is easy to annex between bubble, and air pocket is unfavorable for carrying coarse-grain coarse ore concentrate floating, and desorption phenomenon is tight
Weight, the efficiency of separation are low；When the amount of foaming agent is excessive, foam volume is excessive, and gas holdup is excessively high, and bubble adheres to poor selectivity and no foot
Enough spaces allow particle precipitation, and a large amount of spoil particles enter overflow by foamover, increase overflow ash content, and the stability of bubble
Too strong, defoaming process is difficult, is unfavorable for pipeline transportation and subsequent dewatering operation, and cost of idleness, economy be not high.
The absorption specifically, bubble being mingled in the good coarse-grain coarse ore concentrate and fluidisation water of hydrophobicity in step 2 collides,
Hydrophilic coarse granule spoil is not adsorbed with bubble, and the absorption of bubble reduces the apparent density of coarse-grain coarse ore concentrate, is expanded
Density variation between coarse-grain coarse ore concentrate and spoil floats convenient for coarse-grain coarse ore concentrate；Coarse-grain coarse ore concentrate and fine grained coal slime with ascending current by
The overflow port of hydraulic flotation machine is discharged, into the first buffer barrel；Spoil coarse grain in coarse granule sinks to waterpower as coarse grain tailing d
Flotation motor spindle is discharged through hydraulic flotation machine underflow opening.
Specifically, the partial size of coarse grain tailing d is 0.5-2mm.
Step 3: in the first buffer barrel plus water is stablized after mixing evenly through the second feed pump with certain pressure continuous uniform
The three-product cyclone classifying screen of infeed along a tangential direction be classified, it is downward that ore pulp forms eddy flow in three-product cyclone classifying screen
Movement；The ore pulp moved downward is less than the micro- of sieve pore in ore pulp by the dissection of grating in three-product cyclone classifying screen side wall
Fine slime f is discharged by sieve pore；Coarse granule coal slime continues to move downward to form contour stealth and as coarse grain essence with ore pulp on sieve
Mine e is discharged by the underflow opening of three-product cyclone classifying screen；Fine grained coal slime is with pulp flow to three-product cyclone classifying screen on sieve
The conical section of lower part progressively disengages contour stealth with suffered being gradually increased for resistance, inward eddy from bottom to top is formed, by tertiary industry
Overflow port of the product cyclone classification sieve with sieve is discharged, and enters the second buffer barrel together with lower aid for Micro-fine Coal Slurry Dewatering f with sieving.
Specifically, the partial size of aid for Micro-fine Coal Slurry Dewatering f is less than 0.045mm in step 3, the partial size of coarse-grain coarse ore concentrate e is 0.5-
2mm, the partial size of fine grained coal slime are more than or equal to 0.045mm and to be less than 0.5mm.
Specifically, the valve size on aid for Micro-fine Coal Slurry Dewatering f pipeline can be adjusted in step 3 according to live actual production situation,
Control enters the aid for Micro-fine Coal Slurry Dewatering amount of the second buffer barrel, improves the flexible stability of system.
Step 4: the ore pulp in the second buffer barrel adds suitable quantity of water, after mixing evenly, is stablized by third feed pump continuous uniform
Infeed ore pulp preprocessor, ore pulp dosing stirring in ore pulp preprocessor completes preparatory mineralising, then uniformly feeds flotation
The accurate sorting of column progress fine grained coal slime.
Specifically, pulp density is controlled in 60-120g/L, such as 80g/L after ore pulp adds water and stirs uniformly in step 4；
The ingredient of medicine is collecting agent and foaming agent.
Step 5: the bubble formation adverse current risen in fine grained coal slime and flotation column, the good fine grained essence of surface hydrophobic
Coal, which easily collides with bubble, to be sticked and floats, and is collected and is discharged from flotation column upper end overflow launder as fine concentrate h；Surface hydrophobicity
Property difference fine grained spoil do not collide and stick with bubble, flotation column bottom is sunk to, as fine tailings g by flotation column bottom
Underflow opening discharge.
Compared with prior art, the sorting recovery process of wide grade coal slime provided in this embodiment, coal slime is first through waterpower
Flotation device accurately sorts, and coarse granule spoil shortens work flow by preparatory discharge, improves system processing capacity；Second by three
The desliming classification of product cyclone classification sieve, realization coarse-grain coarse ore concentrate are separated with fine grained coal slime, and it is quasi- to carry out raw material for flotation operation
It is standby, it ensure that the continuity of slime separation process, decrease pollution of the thin mud to slime separation process；In conjunction with using flotation column
To the accurate sorting recycling ability of fine grained coal slime, the wholegrain grade sorting recycling of coal slime from thick to thin is realized；Wide grade, short route
Continuity slime separation technique, be conducive to improve system throughput, reduce transportation route of the coal slime in system, reduce coal slime
It is mutually worn with duct wall and coal slime itself during transportation, prevents coal slime overground, while reducing production cost, realized
Coal slime high efficient sorting；The gradient of coal slime sorts, and the thin mud pollution during separation of coarse slime and fine coal slurry point has been effectively relieved
Coarse granule desorption, " running thick " problem during choosing；The sorting recovery process of wide grade coal slime of the invention is simple process, low
Cost, does not cause damages to environment at low energy consumption.
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 sorting recovery system of width grade coal slime, which is characterized in that including the agitator being arranged along sorting pipeline
(1), hydraulic flotation machine (5), three-product cyclone classifying screen (8), ore pulp preprocessor (11) and flotation column (12)；Agitator (1)
The first feed pump (2) are equipped between hydraulic flotation machine (5)；
The lower part of hydraulic flotation machine (5) is pyramidal structure, and the upper side of pyramidal structure is equipped with the fluidisation mouth of a river, hydraulic flotation machine
(5) bottom is equipped with underflow opening；The first buffer barrel (6) are equipped between hydraulic flotation machine (5) and three-product cyclone classifying screen (8),
First buffer barrel (6) is connect by the second feed pump (7) with three-product cyclone classifying screen (8), three-product cyclone classifying screen (8) and
The second buffer barrel (9) are equipped between ore pulp preprocessor (11), the second buffer barrel (9) is pre- by third feed pump (10) and ore pulp
Processor (11) connection, ore pulp preprocessor (11) are connect with flotation column (12).
2. sorting recovery system according to claim 1, which is characterized in that the top of hydraulic flotation machine (5) is equipped with pan feeding
Mouthful, feeding inlet is connect with the first feed pump (2), and the upper side of hydraulic flotation machine (5) is equipped with overflow port.
3. sorting recovery system according to claim 2, which is characterized in that further include circulating pump (3), circulating pump (3) is logical
Microvesicle generators (4) are crossed to connect with the fluidisation mouth of a river of hydraulic flotation machine (5) bottom.
4. sorting recovery system according to claim 1, which is characterized in that the lower part of three-product cyclone classifying screen (8) is
Pyramidal structure.
5. sorting recovery system according to claim 4, which is characterized in that three-product cyclone classifying screen (8) is equipped with underflow
Mouth and overflow port.
6. sorting recovery system described in -5 according to claim 1, which is characterized in that be additionally provided with feeding device, the feed dress
The agitator (1) is set to feed to coal slurry flotation.
7. a kind of sorting recovery process of width grade coal slime, which is characterized in that recycle system using sorting described in claim 1-6
System, the sorting recovery process include the following steps:
Step 1: will enter float coal mud and feed in agitator, enters float coal mud and water and collecting agent stirring is added to be tuned into ore pulp in agitator,
Feed hydraulic flotation machine；
Step 2: clear water is fed to the fluidisation mouth of a river of hydraulic flotation motor spindle by microvesicle generators, is classified for the first time, ore pulp
In coarse-grain coarse ore concentrate and fine grained coal slime by hydraulic flotation machine overflow port be discharged, into the first buffer barrel；In coarse granule coal slime
Coarse grain spoil through hydraulic flotation machine underflow opening be discharged；
Step 3: in the first buffer barrel plus water feeds three-product cyclone classifying screen and is classified after mixing evenly, fine beans
Mud and fine grained coal slime enter the second buffer barrel, and coarse-grain coarse ore concentrate product is discharged by the underflow opening of three-product cyclone classifying screen；
Step 4: the ore pulp in the second buffer barrel completes preparatory mineralising, then feeds flotation column and carries out the accurate of fine grained coal slime
Sorting.
8. sorting recovery process according to claim 7, which is characterized in that in the step 2, clear water is sent out by microvesicle
When raw device, air and foaming agent are sucked.
9. sorting recovery process according to claim 8, which is characterized in that fine grained coal slime is accurate in the step 4
Sort specific steps are as follows: the bubble formation adverse current risen in fine particulate coal mud and flotation column, the good fine grained essence of surface hydrophobic
Coal collides with bubble to be sticked and floats, and is collected and is discharged from flotation column upper end overflow launder；The fine grained cash of surface hydrophobic difference
Stone is discharged by flotation column bottom underflow opening.
10. according to the described in any item sorting recovery process of claim 7-9, which is characterized in that described to catch in the step 1
Receipts agent is the combination of one or both of kerosene, diesel oil.
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| CN201910542636.1A CN110201790B (en) | 2019-06-21 | 2019-06-21 | Sorting and recycling system and sorting and recycling process for wide-size coal slime |
| PCT/CN2019/106974 WO2020252960A1 (en) | 2019-06-21 | 2019-09-20 | Sorting and recycling system and sorting and recycling process for coarse-grained coal slurry |
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| CN111375483A (en) * | 2020-03-19 | 2020-07-07 | 中国矿业大学 | Separation system and separation process for coal slime recovery |
| WO2020252960A1 (en) * | 2019-06-21 | 2020-12-24 | 中国矿业大学 | Sorting and recycling system and sorting and recycling process for coarse-grained coal slurry |
| CN112973951A (en) * | 2019-12-13 | 2021-06-18 | 南京宝地梅山产城发展有限公司 | Process method for improving precision of desulfurized iron rough concentrate |
| CN114522798A (en) * | 2021-12-30 | 2022-05-24 | 淮北矿业股份有限公司 | Separation process for ultrafine high-ash coal slime difficult to separate |
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| CN112934471A (en) * | 2021-02-22 | 2021-06-11 | 乌海市广源洗煤有限责任公司 | Flotation process for coal difficult to separate and extremely difficult to separate |
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| WO2020252960A1 (en) | 2020-12-24 |
| CN110201790B (en) | 2020-06-16 |
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