CN110523524A - A kind of full grade of anthracite is selected to simplify sorting process - Google Patents
A kind of full grade of anthracite is selected to simplify sorting process Download PDFInfo
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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
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Abstract
A kind of simplified sorting process of the full grade of anthracite, the technique uses a set of Thin density control system using big sieve pore dry screening, the preparatory discharge refuse of the non-dense medium sorting process of lump coal, heavy media technique, concrete operation step is: by raw coal classifying screen prescreening, lump coal discharge refuse is carried out using discharge refuse sorting process system, use three products heavy medium cyclone to sort: by cleaned coal, middle coal separately as product or mixing as head coal product, into de-mediated, dehydration equipment after obtain qualification product；Medium circulation will be carried out after product de-media, dehydration, is recycled, is added medium.Then coal slime is concentrated and is classified, recycle fine coal slurry.This sorting process system is simple, the efficiency of separation is high, product structure is flexible, production run is at low cost, it is easily achieved clean coal yield maximization, a kind of selected simplified sorting process of efficient full grade of anthracite of capital expenditure is reduced, to adapt to the coal preparation plant's needs for adapting to anthracite sorting of construction efficient integrated.
Description
Technical field
The present invention relates to a kind of raw coal sorting process technology, raw coal wet glutinous, smalls amount big more particularly to a kind of moisture
Greatly, the high full grade of anthracite containing cash, the easy argillization difficulty choosing of spoil is selected simplifies sorting process.
Background technique
The features such as anthracite is the highest coal of degree of coalification, has volatile matter low, and fixed carbon is high, and density is big, pure coal is true
Relative density reaches as high as 1.90kg/m3, anthracite purposes is very extensive, and it is more to be mainly used for chemical industry, power generation, metallurgy, civilian etc.
A industry.In recent years, the product of anthracite coal preparation plant, which has been got back, continually develops and applies, and such as thermal stability, good block cleaned coal is
Synthesizing the very good material of ammonia, low ash, low-sulfur, and grindability, good anthracite is not only widely used in iron and steel enterprise's blast furnace blowing and burning
The fuel of iron ore is tied, and also acts as manufacture carbon materials.
Currently, anthracite coal separation factory owner selects technique to mostly use the preceding wet classification desliming+lump coal shallow slot dense medium sorting+smalls of choosing
Two products have pressure dense medium cyclone sorting process.The process system is made of two sets of dense medium separation systems, need to configure two sets it is close
Control system is spent, configures the suspension of two kinds of different densities, process system is complex, and it is highest that anthracite belongs to degree of coalification
Coal, because its coal quality density is big, when pure cash is arranged in sorting, density of suspending liquid needs to reach 1.90-2.20g/cm3, configure stable
High density suspensions are more difficult, and in actual production process, and traditional dense medium sorting process is inevitably often brought into
Sorting groove inner part coal slime and moisture not only reduce the separating density in sorting groove, and also bring increasing into because of coal slime simultaneously
The viscosity for having added suspension has ultimately caused the heavy losses of head coal product.Two product heavy-medium cyclone of smalls is sorted,
Also it because its suspension is than great, and causes to serious wears such as equipment, pipelines, because of separation system complexity, so construction of coal preparation plant
Expense also greatly increases.
For these reasons, research be directed to anthracite especially moisture is big, raw coal it is wet it is glutinous, smalls amount is big, high containing cash, cash
The anthracite of stone easy argillization difficulty choosing efficiently simplifies sorting process, make its process system is simplified, the efficiency of separation is high, construction investment saves,
The sorting process that operating cost is low, automatic degree is high is particularly important.
Summary of the invention
For deficiency existing for existing anthracite sorting process system, the present invention provides that a kind of process system is simple, sorting
It is high-efficient, product structure is flexible, production run is at low cost, it is easy to accomplish clean coal yield maximize, reduce one kind of capital expenditure
The efficient full grade of anthracite is selected to simplify sorting process, to adapt to the coal preparation plant for adapting to anthracite sorting of construction efficient integrated
It needs.
Realize that above-mentioned purpose uses following technical scheme:
A kind of simplified sorting process of the full grade of efficient anthracite, this method include the preparatory discharge refuse sorting of lump coal；Three products' dense-media matter
Cyclone sorting；Product de-media, dehydration；Medium circulation is recycled, is added；Coal slime flotation concentration classification；Slightly, fine coal slurry recycles；Its
It is characterized in that, the technique uses a set of Thin density control system, and the concrete operation step of the technique is:
A. the preparatory discharge refuse of lump coal: by raw coal classifying screen prescreening, carrying out lump coal discharge refuse using discharge refuse sorting process system, point
Grade granularity requires and gives discharge refuse screening installation performance according to coal quality situation, product structure and choose, upper limit 300mm, 200mm,
150mm, 100mm, 80mm, lower limit 80mm, 50 mm, 25mm；
B. three products heavy medium cyclone sorts:
By raw coal under the sieve of a step or after sieving lower raw coal and giving discharge refuse, the cleaned coal through being crushed is mixed into three products' dense-media matter eddy flow
Device is sorted, and three kinds of cleaned coal, middle coal, spoil products both can be obtained；
C. product de-media, dehydration:
Regard cleaned coal, middle coal as head coal product separately as product or mixing, into de-mediated, dehydration equipment after obtain qualified production
Product；
Spoil product feeds spoil de-mediated equipment and carries out de-mediated, obtains pure spoil product；
D. medium circulation, recycle, add:
Smart, middle coal mix products, the spoil product of Step d feed the processing of two sections of de-mediated equipment respectively, obtain qualified suspension and
Obtained qualified suspension is directly recovered in conjunction Jie's bucket and is recycled by dilute suspension；
By obtained essence, in separately as under one section of de-mediated equipment of product or mix products shunt and dilute suspension, into magnetic separation
Machine is recycled, and the magnetic concentrate recycled, which enters, closes Jie's bucket, and magnetic tailing is collected with magnetic tail bucket；
Obtained spoil dilute suspension is entered magnetic separator to recycle, the magnetic concentrate recycled, which enters, closes Jie's bucket, magnetic
Tailing magnetic tail bucket is selected to collect；
It adds after medium is diluted with water stirring using qualified magnetite powder, feeds and close Jie's bucket and be recycled；
E. coal slime concentration classification: after the coal slime in e step in magnetic tail bucket is classified by concentrate cyclone group, underflow passes through vibration
Sieve bend and coal slime centrifuge dehydration recycling, cyclone overflow, backwater and coal slime centrifugate enter fine coal slurry recovery system；
F. fine coal slurry recycles: duff muddy water enters floatation system sorting or coal slime thickener, and underflow is returned with coal slime filter press
It receives；Filter press filtrate, thickener overflow enter circulating water pool together, as full factory's cycling use of water.
As a preferred solution:
Before feed coal gives discharge refuse, using big sieve pore dry screening, partition size is according to Coal Characteristics, product structure requirement, factory's type
Size determines that sieve pore 80mm, 50 mm, 25mm, screen size can arbitrarily be chosen in 80~25mm.
The discharge refuse sorting process system is using ray sorting, the dry separation system of pneumatic separating or using jigging
Machine moves wet sieving diameter separation system, and the product after discharge refuse is mixed with classification screenings as final products or after entering broken crusher machine
The feed coal for selecting workshop to sort based on cooperation.
Qualified production is obtained after the cleaned coal, middle gangue product are carried out de-mediated, dehydration equipment separately as product
Product, or block cleaned coal and fine cleaned coal are obtained by classification；
The Thin density control system is mainly by three products heavy medium cyclone, arc sculping screen, circularoscillations sieve, shunting
Case, centrifuge, dilute Jie's bucket, magnetic separator, conjunction Jie's bucket sequentially connect composition.
The de-mediated of the Thin density control system is by entering arc after cleaned coal sieve bend, middle coal sieve bend or essence, middle mixing
Sieve, respective de-mediated sieve bend are connected with three products heavy medium cyclone respectively.
The vibration sculping screen of the Thin density control system vibrates sculping screen by spoil and cleaned coal vibrates sculping screen, middle coal
It vibrates and shares vibration sculping screen composition after mixing in sculping screen or essence.
The spoil sieve bend of the Thin density control system is connected to Coal Stone Separation, and cleaned coal vibrates sculping screen and cleaned coal
The connection of arc sculping screen, middle coal vibration sculping screen are connected to middle coal arc sculping screen, dilute Jie's section suspension under vibration sculping screen sieve
It is connect with dilute Jie's bucket, dilute Jie's bucket is connect with magnetic separator, and magnetic separator is connect with Jie's bucket is closed, and closes Jie's bucket and three products heavy medium cyclone
Connection.
Compared with prior art, remarkable result of the invention is:
1, big grading replaces efficient tension and relaxation dry method desliming or wet classification desliming before choosing, reduces capital expenditure and running cost
With, it can be achieved that Business Economic Benefit maximizes.
Before feed coal gives discharge refuse, using big sieve pore dry screening, usually top size can use 300mm, 200mm, 150mm,
100mm, 80mm, lower limit 80mm, 50 mm, 25mm.Partition size is according to Coal Characteristics, product structure requirement, factory's type size
Deng sieve pore takes 80mm, 50 mm, 25 mm.Big sieve pore dry screening, first, avoid from technique raw coal moisture it is big, it is wet it is glutinous,
The big feature bring of smalls amount is difficult to dry screening problem, and sieve pore can be in 80~25mm according to coal quality situation, screen size at this time
Interior any selection, big sieve pore dry screening ensure screening efficiency.The second, big mesh screen point simultaneously, has both efficient desliming effect,
Effective desliming has been built the advantage and sorting environment that low-viscosity sorts under high density to discharge refuse screening installation is given, has been guaranteed
Separating density, it is ensured that equipment efficient separation under high-precision is conducive to the raising of clean coal yield.Third, the technology generations are replaced
Traditional dry method flip flop screen or wet process desliming is particularly suitable for the screening of raw coal moisture big, wet glutinous material, on the one hand can reduce coal
Muddy water system loading, on the other hand avoid because in raw coal spoil meet water easy argillization due to caused by the higher situation of coal slime ash content.
Meanwhile capital expenditure and operating cost are also reduced, it can be achieved that Business Economic Benefit maximizes.
2, the on-the-sieve material coal after big grading uses non-dense-medium separation method sorting process, improves lump coal separation and sets
Production run expense is reduced while standby sharpness of separation, it can be achieved that Business Economic Benefit maximizes.
On-the-sieve material coal after big grading uses non-dense-medium separation method, and ray point may be selected in main screening installation
Choosing, the dry sorting equipment of pneumatic separating or using jigging machine, dynamic wet sieving diameter screening installation, are just improved from process procedure setting is upper
Lower limit of separation value, is conducive to the advantage for playing the above screening installation, is also mentioned to the processing capacity potentiality of stand-alone device
It is high.Meanwhile raw coal is sorted by preparatory discharge refuse to subsequent three products heavy medium cyclone and wearability aspect also provides favorably
The processing capacity 15-20% of separation system can be improved in condition, and clean coal yield 3-5% can be improved, meanwhile, block spoil pair can also be reduced
The abrasion of follow-up equipment reduces production run cost 5-10%.
3, traditional wet classification desliming+lump coal shallow slot dense medium is replaced using sorting process of three-product HM cyclone
Two product dual medium cyclone dressing technique of sorting+smalls realizes one section of cyclone relative low density sorting, two sections of cyclone height
The double effects of density discharge refuse sorting.
Lump coal is using discharge refuse technique and the full grade three-product HM cyclone sorting process optimum organization of No severing mud is given, instead of passing
" the wet process desliming+two product dual medium cyclone dressing technique of lump coal shallow slot dense medium sorting+smalls " or " traditional full grade dense medium of system
Matter cyclone sorting process ".Real wholegrain degree level high-density, the sorting of high-precision discharge refuse are realized, anthracite belongs to coalification journey
Highest coal is spent, because its coal quality density is big, when pure cash is arranged in sorting, separating density generally requires to reach 2.00kg/m3 Left and right, matches
It is more difficult to set stable high density suspensions.The general upper limit of shallow-tank separator separating density is 1.90 kg/m3, using shallow slot
Sorting machine carries out high density discharge refuse, because its suspension separating density is extremely difficult to 2.00 kg/m3 More than, traditional handicraft also tends to
Because desliming effect is bad, raw coal enters shallow-tank separator, not only reduces the separating density in sorting groove, also outstanding because increasing
Supernatant liquid viscosity thereby reduces the separating effect of shallow-tank separator, can usually lose head coal product.First, lump coal of the present invention gives
The sorting process that discharge refuse separation system uses has the characteristics that be easily achieved high density, the sorting of high efficiency discharge refuse, can give full play to
The advantage of Processes and apparatus.Second, the present invention to be unsuitable for lump coal system sorting relatively small particle size fraction material, using not
The full grade three-product HM cyclone sorting process technology of desliming replaces traditional two product heavy-medium cyclone sorting process of smalls
Technology, high density suspensions need to be configured by avoiding traditional two product heavy-medium cyclone sorting process of smalls, and be caused to setting
The serious wears such as standby, pipeline, when if necessary to produce three kinds of products, it is thus also avoided that using two product heavy-medium cyclone masters, again
Technique is selected, and needs two sets of density control systems, construction of coal preparation plant expense also greatly increases.It is sorted using three-product HM cyclone
Technique can avoid problem above, only needs a set of low-density heavy-media suspension control system, sufficiently exists using heavy medium cyclone
Under powerful centrifugal force effect, realizes material sorting, suspension desliming purification, suspension inspissation, realize a Duan Xuanliu
The sorting of device relative low density, the double effects of two sections of cyclone high density discharge refuses sorting.General configuration heavy-media suspension density
For 1.40-1.70 kg/m3 , i.e. two sections of heavy medium cyclone achievable 1.80-2.50 kg/m3The sorting of high density discharge refuse.
Three kinds of cleaned coal, middle coal, spoil products can be once produced using three-product HM cyclone sorting process, it can also root
According to the market demand, cleaned coal, middle coal are incorporated as head coal product, product structure is flexible, and system automation degree is high, and operation is just
It is prompt.
4, using two sets of density control systems of a set of Thin density control systematic substitution, high density is realized with low-density suspension
Discharge refuse sorting
Using three-product HM cyclone, a set of low-density heavy-media suspension control system is only needed, dense medium cyclone is sufficiently applied
Device is flowed under powerful centrifugal force effect, is realized material sorting, suspension desliming purification, suspension inspissation, is realized one
Section cyclone relative low density sorting, can produce low ash extract coal product.The dual effect of two sections of cyclone high density discharge refuses sorting
Fruit.General configuration heavy-media suspension density is 1.40-1.70 kg/m3 , i.e. two sections of achievable 1.80- of heavy medium cyclone
2.50 kg/m3The sorting of high density discharge refuse.Improve clean coal yield, realize by configure low-density suspension reach one section it is low
Density, two sections of high density sort purpose, and product structure is flexible, the ability with very strong adaptation to market variations.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and embodiments.
The invention discloses a kind of selected simplified sorting process of efficient full grade of anthracite, equipment used in the technique is shown in attached
Fig. 1 has: vibrating screen, crusher, three products heavy medium cyclone, arc sculping screen, head coal sculpingscreen, middle coal sculping screen, spoil
Sculping screen, magnetic separator, centrifugal dehydrator, concentrate cyclone group, vibration sieve bend, coal slime centrifuge, tail coal thickener, tail coal pressure
Filter etc..Drying slime system is located at the tail end of entire separation system.Between each system, used between equipment according to functional sequence
Chute and pipeline linking.
Design philosophy of the invention is: first is that before feed coal gives discharge refuse, using big sieve pore dry screening, with big granularity before choosing
Classification replaces the efficient tension and relaxation dry method desliming or wet classification desliming of the prior art；Second is that primary using three-product HM cyclone
Sorting process replaces traditional wet classification desliming+two product dual medium cyclone dressing technique of lump coal shallow slot dense medium sorting+smalls；
Third is that realizing high density discharge refuse point with low-density suspension using two sets of density control systems of a set of Thin density control systematic substitution
Choosing.
Low-density heavy-media suspension control system of the invention is by three products heavy medium cyclone, arc sculping screen, arc
Shape vibrating screen, current divider box, centrifuge, dilute Jie's bucket, magnetic separator, conjunction Jie's bucket sequentially connect composition.
The arc sculping screen of Thin density control system is made of Coal Stone Separation and cleaned coal arc sculping screen, respectively with tertiary industry
Product heavy medium cyclone pipeline connection.
The circularoscillations sieve of Thin density control system is made of spoil vibrating screen and cleaned coal vibration sculping screen.
The spoil vibrating screen and Coal Stone Separation of Thin density control system vibrate sculping screen and essence by pipeline connection, cleaned coal
Coal arc sculping screen passes through pipe by piping connection, dilute Jie's bucket and magnetic separator by pipeline connection, Coal Stone Separation and dilute Jie's bucket
Road connection, magnetic separator and conjunction Jie's bucket piping connection, close Jie's bucket and three products heavy medium cyclone pass through pipeline connection.
Specific process step embodiment of the invention is shown in Fig. 1:
1. prescreening, is crushed discharge refuse sorting: using screen slot pre- for 80 mm, 50 mm, 25mm prescreening vibrating screens in raw coal
It first sieves, control hand picking is carried out to oversize, carry out discharge refuse into discharge refuse separation system, block cleaned coal is directly as product.
Crusher can be entered, after being crushed to certain particle size, mix with prescreening vibrating screen undersize material and sorted as main shop
Feed coal.
This partition size can usually require according to coal quality situation, product structure, give the selection of discharge refuse screening installation performance, often
The normal upper limit can use 300mm, 200mm, 150mm, 100mm, 80mm, and lower limit can use 80mm, 50mm, 25mm.
The present embodiment uses screen slot to sieve for the vibrating screen of 50 mm.Control hand picking is carried out to oversize first, into row
Cash separation system carries out discharge refuse, and block cleaned coal is directly as product.It can also pass through crusher, after being crushed to certain particle size, with
The mixing of prescreening vibrating screen undersize material sorts feed coal as main shop；
The discharge refuse sorting process system of the present embodiment carries out dry separation using pneumatic separator,
It can be sorted with ray, or use jigging machine, dynamic wet sieving diameter separation system, the product after discharge refuse is as final products or entrance
After broken crusher machine, mix with classification screenings as the main feed coal for selecting workshop to sort.
2. raw coal separation: the feed coal of step 1 enters three products heavy medium cyclone and is sorted, obtain cleaned coal, middle coal,
Three kinds of products of spoil, also two kinds of available cleaned coal, spoil products.
3. product de-media, dehydration: according to market needs, cleaned coal, the mixing of middle coal are used as head coal product, into de-mediated, dehydration
Qualified product is obtained after equipment；
Spoil product feeds spoil de-mediated equipment and carries out de-mediated, obtains pure spoil product；It can also be carried out separately as product
Qualified product is obtained after de-mediated, dehydration equipment, or block cleaned coal and fine cleaned coal are obtained by classification.
The present embodiment feeds cleaned coal arc sculping screen after mixing two kinds of products of cleaned coal and middle coal, cleaned coal vibration sculping screen takes off
After water, de-mediated, classification, qualified head coal product is obtained after centrifugal dehydrator is dehydrated again；Spoil product is fed into spoil arc
After shape sculping screen and spoil vibration sculping screen de-mediated, dehydration, pure spoil product is obtained；
4. medium circulation recycles, adds system: smart, middle coal mix products, spoil product are fed respectively at two sections of de-mediated equipment
Reason, obtains qualified suspension and dilute suspension, obtained qualified suspension is directly recovered in conjunction Jie's bucket and is recycled；
Will under obtained smart, middle one section of de-mediated equipment of coal mix products shunt and dilute suspension, recycled into magnetic separator, return
It receives obtained magnetic concentrate and enters conjunction Jie's bucket, magnetic tailing is collected with magnetic tail bucket；
Obtained spoil dilute suspension is entered magnetic separator to recycle, the magnetic concentrate recycled, which enters, closes Jie's bucket, magnetic
Tailing magnetic tail bucket is selected to collect；
It is de- that cleaned coal, middle coal mixtures, the spoil product of 4 step of the present embodiment feed cleaned coal arc sculping screen, spoil arc respectively
Be situated between sieve and cleaned coal vibration sculping screen, spoil vibration sculping screen processing, obtains qualified suspension and dilute suspension, the qualification that will be obtained
Suspension is directly recovered to close and be recycled in Jie's bucket；It will be shunted under obtained cleaned coal, middle coal mixtures cleaned coal arc sculping screen
A part is fed into current divider box closes Jie's bucket, and the dilute suspension of another part and the two enters magnetic separator and recycled, and recycles
To magnetic concentrate enter close Jie's bucket, magnetic tailing with magnetic tail bucket collect after enter slurry circulating system；Spoil product is through de-
Dilute suspension after Jie enters dilute Jie's bucket；Adding medium mode and using to add qualified magnetic iron ore dry powder and feed to close Jie's bucket and recycle makes
With.
5. coal slime concentration classification: after the coal slime in 5 steps in magnetic tail bucket is classified by concentrate cyclone group, underflow passes through
Vibration sieve bend and coal slime centrifuge dehydration recycling, cyclone overflow, backwater enter fine coal slurry recovery system；
6. fine coal slurry recycles: slime separation recovery system directlys adopt concentration filter-pressing process.Duff muddy water enters floatation system point
Choosing or coal slime thickener, underflow are recycled with coal slime filter press according to index request, be can also pass through floatation system sorting, are floatingly selected
Concentrate and tailings, concentrate are dehydrated by filter press and are recycled, and tailing enters the sedimentation of coal slime thickener, and underflow is dehydrated with coal slime filter press
Recycling；Filter press filtrate, thickener overflow enter circulating water pool together, as full factory's cycling use of water.
According to index request, slime separation recovery system can also pass through floatation system sorting, floatingly select concentrate and tailings, essence
Mine is dehydrated by filter press and is recycled, and tailing enters the sedimentation of coal slime thickener, and underflow is dehydrated with coal slime filter press and is recycled；Filters pressing machine filter
Liquid, thickener overflow enter circulating water pool together, as full factory's cycling use of water.
Above-described embodiment only expresses one embodiment of the present invention, and but it cannot be understood as to model of the present invention
The limitation enclosed.It should be pointed out that for those of ordinary skill in the art, without departing from the inventive concept of the premise, also
Several modifications and improvements can be made, these are all within the scope of protection of the present invention.
Claims (7)
1. a kind of full grade of anthracite simplifies sorting process, which includes the preparatory discharge refuse sorting of lump coal；Three products' dense-media matter eddy flow
Device sorting；Product de-media, dehydration；Medium circulation is recycled, is added；Coal slime flotation concentration classification；Slightly, fine coal slurry recycles；Its feature
It is, the technique is using big sieve pore dry screening, the preparatory discharge refuse of the non-dense medium sorting process of lump coal, heavy media technique using a set of low
The concrete operation step of density control system, the technique is:
A. the preparatory discharge refuse of lump coal: by raw coal classifying screen prescreening, carrying out lump coal discharge refuse using discharge refuse sorting process system, point
Grade granularity requires and gives discharge refuse screening installation performance according to coal quality situation, product structure and choose, upper limit 300mm, 200mm,
150mm, 100mm, 80mm, lower limit 80mm, 50 mm, 25mm；
B. three products heavy medium cyclone sorts:
By raw coal under the sieve of a step or after sieving lower raw coal and giving discharge refuse, the cleaned coal through being crushed is mixed into three products' dense-media matter eddy flow
Device is sorted, and three kinds of cleaned coal, middle coal, spoil products are obtained；
C. product de-media, dehydration:
Regard cleaned coal, middle coal as head coal product separately as product or mixing, into de-mediated, dehydration equipment after obtain qualified production
Product；
Spoil product feeds spoil de-mediated equipment and carries out de-mediated, obtains pure spoil product；
D. medium circulation, recycle, add:
Smart, the middle coal of Step d feeds two sections of de-mediated equipment processing separately as product or mix products, spoil product respectively, obtains
To qualified suspension and dilute suspension, obtained qualified suspension is directly recovered in conjunction Jie's bucket and is recycled；
By obtained smart, middle coal separately as shunting and dilute suspension under one section of de-mediated equipment of product or mix products, into magnetic
Machine is selected to be recycled, the magnetic concentrate recycled, which enters, closes Jie's bucket, and magnetic tailing is collected with magnetic tail bucket；
Obtained spoil dilute suspension is entered magnetic separator to recycle, the magnetic concentrate recycled, which enters, closes Jie's bucket, magnetic
Tailing magnetic tail bucket is selected to collect；
It adds after medium is diluted with water stirring using qualified magnetite powder, feeds and close Jie's bucket and be recycled；
E. coal slime concentration classification: after the coal slime in e step in magnetic tail bucket is classified by concentrate cyclone, underflow passes through the arc of oscillation
Shape sieve and coal slime centrifuge dehydration recycling, cyclone overflow, backwater and coal slime centrifugate enter fine coal slurry recovery system；
F. fine coal slurry recycles: duff muddy water enters floatation system sorting or coal slime thickener, and underflow is returned with coal slime filter press
It receives；Filter press filtrate, thickener overflow enter circulating water pool together, as full factory's cycling use of water.
2. the full grade sorting process of a kind of anthracite according to claim 1, which is characterized in that before feed coal gives discharge refuse, adopt
With big sieve pore dry screening, partition size is required according to Coal Characteristics, product structure, factory's type size determines, sieve pore 80mm, 50
Mm, 25mm, screen size are arbitrarily chosen in 80~25mm.
3. the full grade sorting process of a kind of anthracite according to claim 1, which is characterized in that the discharge refuse sorting process
System uses ray sorting, the dry separation system of pneumatic separating or use jigging machine, moves wet sieving diameter separation system, after discharge refuse
Product is mixed with classification screenings as the main feed coal for selecting workshop to sort as final products or after entering broken crusher machine.
4. the full grade sorting process of a kind of anthracite according to claim 1, which is characterized in that the Thin density control system
System mainly by three products heavy medium cyclone, arc sculping screen, de-mediated vibrating screen, current divider box, centrifuge, dilute Jie's bucket, magnetic separator,
It closes Jie's bucket and sequentially connects composition.
5. the full grade sorting process of a kind of anthracite according to claim 1 or 4, which is characterized in that the low-density control
The de-mediated of system processed is by entering sieve bend, respective de-mediated sieve bend difference after cleaned coal sieve bend, middle coal sieve bend or essence, middle mixing
It is connected with three products heavy medium cyclone.
6. the full grade sorting process of a kind of anthracite according to claim 1 or 4, which is characterized in that the low-density control
The vibration sculping screen of system processed vibrates sculping screen by spoil and cleaned coal vibration sculping screen, middle coal vibration sculping screen or essence, middle coal mix
Vibration sculping screen composition is shared after conjunction.
7. the full grade sorting process of a kind of anthracite according to claim 1 or 4, which is characterized in that the low-density control
The spoil sieve bend of system processed is connected to Coal Stone Separation, and cleaned coal vibration sculping screen is connected to cleaned coal arc sculping screen, middle coal vibration
Dynamic sculping screen be connected to middle coal arc sculping screen, and dilute Jie's section suspension is connect with dilute Jie's bucket under vibration sculping screen sieves, dilute Jie's bucket and
Magnetic separator connection, magnetic separator are connect with Jie's bucket is closed, and are closed Jie's bucket and are connected to three products heavy medium cyclone.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111681885A (en) * | 2020-05-14 | 2020-09-18 | 内蒙古浦瑞芬环保科技有限公司 | Raw material preparation method of super capacitor |
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| CN117282536B (en) * | 2023-11-14 | 2024-04-16 | 海南星界和光科技有限公司 | Comprehensive utilization method of coal gangue |
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