CN203791036U - Coarse slime dense medium separation system - Google Patents
Coarse slime dense medium separation system Download PDFInfo
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- CN203791036U CN203791036U CN201420139626.6U CN201420139626U CN203791036U CN 203791036 U CN203791036 U CN 203791036U CN 201420139626 U CN201420139626 U CN 201420139626U CN 203791036 U CN203791036 U CN 203791036U
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- 239000000725 suspension Substances 0.000 claims abstract description 22
- 239000006148 magnetic separator Substances 0.000 claims description 36
- 230000010355 oscillation Effects 0.000 claims description 32
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- 239000002609 medium Substances 0.000 description 36
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Abstract
The utility model discloses a coarse slime dense medium separation system. The coarse slime dense medium separation system consists of a fractional desliming device, a mixing device, a coarse slime separating device, a medium removing device, a water removing device and a control device, wherein the fractional desliming device is used for controlling the granularity and the water quantity of materials; the mixing device is used for collecting and mixing coarse slime materials, medium suspension liquid, supplemented media and clear water; the coarse slime separation device is used for separating the coarse slime materials; the medium removing device is used for removing media from clean coal, middlings and gangue products which are obtained by separating coarse slimes and recycling magnetite powder; and the water removing device is used for removing water from products after media are removed from the products, so that the moisture of the products is controlled. The coarse slime dense medium separation system is suitable for various washable coals; the media in the materials are recycled by the arc-shaped medium removing device and a magnetic separation machine in a combined manner; the medium recycling links are simplified; the medium consumption is controlled; production, operation and maintenance are facilitated; and the coarse slime dense medium separation system has the advantages of easiness in operation, high separation effect, high work effect, environmental protection, energy conservation, high adaptive capacity and the like.
Description
Technical field
The utility model belongs to Coal Washing Techniques field, specifically a kind of easy to operate, sharpness of separation is high, production efficiency is high coarse slime dense medium separation system.
Background technology
In recent years along with raw coal character is increasingly sophisticated, the mechanization of technology, in raw coal, coarse slime content is more and more, ends 2010, national coal year enter the amount of washing and reach 16.5 hundred million tons, and the coarse slime output of association is over 200,000,000 tons.For 2～0.1mm particle size fraction coarse slime, carry out " effectively sorting " and become each designing unit, and the Important Problems of coal preparation plant's work.
Existing coal preparation process, effective size range of separation that lump coal separation system is dominated is all over 1mm.And be directed to the floatation process of fine grained coal slime sorting, and because of self restriction, require selected grade to be less than 0.5mm, be even less than 0.3mm; And be controlled at 0.1～0.15mm for the superfine slime separation technological requirement particle size fraction upper limit of flotation column.As can be seen here, existing leading technique is limited to separation of coarse slime index, is difficult to reach effective sorting and reclaims.
Coarse slime washing process now, comprises: spiral chute, and hindered bed separator, hydrocyclone,, all there is the limitation of technique and equipment of itself in Slime dense medium cyclones etc., and the effect of separation of coarse slime is poor.Spiral chute is mainly in thermal coal separation of coarse slime, and it is upper that classification density only maintains 1.6kg/l, belongs to ragging gangue equipments; Hindered bed separator, belongs to aqueous medium screening installation, only processes easily choosing, medium optional coal, poor for difficult separation coal kind effect; Hydrocyclone, only has on-the-spot trial of part to use, and because service condition requires harshness, separating effect fluctuation is larger, does not obtain the effect of achievement approval always; Coal slime heavy medium cyclone uses in the three-product cyclone technique of lump coal separation, process this part coal slime that qualified medium suspension distributes, sub-elect two kinds of products, because continuing to change, technique shunt volume cause coal slime dense medium to be difficult to steady pressure and flow, another its " part coal slime " and density of only processing qualified medium is uncontrollable, cleaned coal tail coal ash content is poor little, weak effect.Therefore now technique, equipment are difficult to guarantee the higher sharpness of separation of coarse slime, and the adaptive capacity to each washability coal, are also difficult to the product quality of coarse slime to accomplish controllable flexible production.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of simple to operate, effective to separation of coarse slime, good working effect, adaptable coarse slime dense medium separation system are provided.
For realizing above object, the present invention by the following technical solutions:
A coarse slime dense medium separation system, is characterized in that being comprised of graded desliming device, mixing device, separation of coarse slime device, de-mediated, dewater unit and control device, wherein:
Graded desliming device, for the granularity of material, control and water yield control, by classifying cyclone (1) and arc dewatering screen (2), formed, the underflow head piece of cyclone (1) is connected with the import of arc dewatering screen (2) through pipeline, classifying cyclone (1) is for the raw coal desliming to coal preparation plant's main system, jigging water, and the black water in cleaned coal magnetic tailing and middle cash magnetic tail ore deposit carries out classification concentration, remove the thin mud of high ash, obtain being greater than the high concentration coarse slime of 0.1mm grade; Arc dewatering screen (2), for classifying cyclone underflow is carried out to dewatering operation, reduces the water yield that enters mixing system,
Mixing device, coarse slime material, dielectric suspensions, the collection of adding medium and clear water place are mixed, by mixing tank (3) and pump (4), formed, mixing tank (3) suspends, adds medium and dilution water etc. for receiving coarse slime material, the qualified medium of classifying cyclone, further mix, and provide serum materials for coarse slime dense media separator; Contactor pump (4) is for delivery of the material in mixing tank, and certain pressure sends into mixed serum materials in coal slime heavy-media separator,
Separation of coarse slime device, carries out sorting to coarse slime material, adopts coal slime heavy-media separator (6), according to final products requirement, sub-elects cleaned coal, middle coal and three kinds of products of spoil,
Medium-separation device, for the cleaned coal to separation of coarse slime, middle coal and spoil product carry out that medium removes and the recycling of magnetite powder, by arc sculping screen (6), (7), and magnetic separator (9) (8), (10), (11) form, arc sculping screen is divided into cleaned coal arc sculping screen (6), middle coal arc sculping screen (7) and spoil arc sculping screen (8), magnetic separator is by cleaned coal magnetic separator (9), middle coal magnetic separator (10) and spoil magnetic separator (11), cleaned coal arc sculping screen (6), for the cleaned coal that coarse slime heavy-media separator is sub-elected, carry out emphasis de-mediated, sieve mouth arranges water injector, sieve low suspension liquid returns to mixing tank and recycles, middle coal arc sculping screen (7) carries out emphasis de-mediated for the coal that coarse slime heavy-media separator is sub-elected, and sieve mouth arranges water injector, and sieve low suspension liquid returns to mixing tank and recycles, spoil arc sculping screen (8) carries out emphasis de-mediated for the cash coal that coarse slime heavy-media separator is sub-elected, and sieve mouth arranges water injector, and sieve low suspension liquid returns to mixing tank and recycles, cleaned coal magnetic separator (9), for the head coal product of cleaned coal sieve bend is scanned to de-mediated, reduces the medium amount consumption that head coal product is taken away, and cleaned coal magnetic concentrate returns to mixing tank, middle coal magnetic separator (10) is scanned de-mediated for the product of coal of centering coal sieve bend, the medium amount consumption that in reduction, product of coal is taken away, and middle coal magnetic concentrate returns to mixing tank, spoil magnetic separator (11), for the spoil of spoil sieve bend is scanned to de-mediated, reduces the medium amount consumption that spoil is taken away, and spoil magnetic concentrate returns to mixing tank,
Dewater unit, for the product after de-mediated is carried out to processed, to control product moisture, by arc dewatering screen, high-frequency oscillation dewatering screen, filtering centrifuge (18) combination, arc dewatering screen is by cleaned coal arc dewatering screen (12), middle coal arc dewatering screen (13) and spoil arc dewatering screen (14) form, high-frequency oscillation dewatering screen is by cleaned coal high-frequency oscillation dewatering screen (15), middle coal high-frequency oscillation dewatering screen (16) and spoil high-frequency oscillation dewatering screen (17) form, cleaned coal arc dewatering screen (12), for selected magnetic tailing is carried out to cleaned coal preliminary hydro-extraction, backwater feeds flotation, middle coal arc dewatering screen (13), carries out coal preliminary hydro-extraction for centering coal magnetic tailing, and backwater feeds concentrated, spoil arc dewatering screen (14), for spoil magnetic tailing is carried out to spoil preliminary hydro-extraction, backwater feeds concentrated, cleaned coal high-frequency oscillation dewatering screen (15), carries out second dehydration for the cleaned coal on selected arc dewatering screen, and backwater feeds flotation, middle coal high-frequency oscillation dewatering screen (16), carries out second dehydration for the coal on centering coal arc dewatering screen, and backwater feeds concentrated, spoil high-frequency oscillation dewatering screen (17), carries out second dehydration for the spoil on spoil arc dewatering screen, and backwater feeds concentrated, filtering centrifuge (18) is for carrying out final dewatering processing to the upper cleaned coal of selected high-frequency dewatering screen sieve, and to control final products moisture content index, centrifugate feeds flotation.
Mixing tank (3) in separation of coarse slime device of the present invention adopts post cone structure, is inside lined with wearing layer, and mixing tank bottom arranges batch mixing charging connector, in the middle of mixing tank, agitating device is set, and mixing tank (3) is provided with fluid level meter and filling pipe.
Separation of coarse slime device of the present invention adopts coarse slime heavy-media separator (5), by a segment body and bis body tandem compound, is formed, and one section arranges cone, taper angle theta 1 is 5 ° ~ 40 °, two sections arrange cone, and taper angle theta 2 is 5 ° ~ 90 °, 5 ° ~ 30 ° of setting angles.One section of front end arranges feed entrance and cleaned coal outlet, and two sections of one end are provided with middle coal export, and the other end is provided with spoil outlet, and wherein one or two sections of centres arrange passage.
The present invention can be provided with central control device, for corresponding link parameter is monitored and is adjusted, mainly comprise that densitometer, pressure sensor and servomotor form, mixing tank (3) and separator intermediate link density of setting meter, pressure sensor, densitometer is for monitoring the pan feeding pulp density of coarse slime heavy-media separator, to regulate and control the washing density of coal slime in dense media separator by adding medium and clear water in time; Pressure sensor is for monitoring the feed pressure of coal slime heavy-media separator, and servomotor is adjusted contactor pump frequency and controlled speed and the centrifugal intensity that material enters separator, regulates separation index, automatically controls product quality.
The present invention is flexible by production application; Utilize coarse slime heavy-media separator to process coarse slime, washing index is reliable and stable, is applicable to the coal of each washability; Adopt the medium circulation utilization in arc de-mediated and magnetic separator combination recovered material, simplify medium and reclaim link, dielectric dissipation measures to control, and facilitates production operation to safeguard, has simple to operate, good separation effect, good working effect, environmental protection and energy saving, the advantage such as adaptable.
accompanying drawing explanation
Fig. 1 is a kind of process flow diagram of the present invention.
Fig. 2 is another kind of process flow diagram of the present invention.
Fig. 3 is a kind of structural representation sketch of coarse slime heavy-media separator in the present invention.
The specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in the figure, a kind of coarse slime dense medium separation system, is characterized in that being comprised of graded desliming device, mixing device, separation of coarse slime device, de-mediated, dewater unit and control device, wherein:
Graded desliming device, for the granularity of material, control and water yield control, by classifying cyclone (1) and arc dewatering screen (2), formed, the underflow head piece of cyclone (1) is connected with the import of arc dewatering screen (2) through pipeline, classifying cyclone (1) is for the raw coal desliming to coal preparation plant's main system, jigging water, and the black water in cleaned coal magnetic tailing and middle cash magnetic tail ore deposit carries out classification concentration, remove the thin mud of high ash, obtain being greater than the high concentration coarse slime of 0.1mm grade; Arc dewatering screen (2), for classifying cyclone underflow is carried out to dewatering operation, reduces the water yield that enters mixing system,
Mixing device, coarse slime material, dielectric suspensions, the collection of adding medium and clear water place are mixed, by mixing tank (3) and pump (4), formed, mixing tank (3) suspends, adds medium and dilution water etc. for receiving coarse slime material, the qualified medium of classifying cyclone, further mix, and provide serum materials for coarse slime dense media separator; Contactor pump (4) is for delivery of the material in mixing tank, and certain pressure sends into mixed serum materials in coal slime heavy-media separator,
Separation of coarse slime device, carries out sorting to coarse slime material, adopts coal slime heavy-media separator (6), according to final products requirement, sub-elects cleaned coal, middle coal and three kinds of products of spoil,
Medium-separation device, for the cleaned coal to separation of coarse slime, middle coal and spoil product carry out that medium removes and the recycling of magnetite powder, by arc sculping screen (6), (7), and magnetic separator (9) (8), (10), (11) form, arc sculping screen is divided into cleaned coal arc sculping screen (6), middle coal arc sculping screen (7) and spoil arc sculping screen (8), magnetic separator is by cleaned coal magnetic separator (9), middle coal magnetic separator (10) and spoil magnetic separator (11), cleaned coal arc sculping screen (6), for the cleaned coal that coarse slime heavy-media separator is sub-elected, carry out emphasis de-mediated, sieve mouth arranges water injector, sieve low suspension liquid returns to mixing tank and recycles, middle coal arc sculping screen (7) carries out emphasis de-mediated for the coal that coarse slime heavy-media separator is sub-elected, and sieve mouth arranges water injector, and sieve low suspension liquid returns to mixing tank and recycles, spoil arc sculping screen (8) carries out emphasis de-mediated for the cash coal that coarse slime heavy-media separator is sub-elected, and sieve mouth arranges water injector, and sieve low suspension liquid returns to mixing tank and recycles, cleaned coal magnetic separator (9), for the head coal product of cleaned coal sieve bend is scanned to de-mediated, reduces the medium amount consumption that head coal product is taken away, and cleaned coal magnetic concentrate returns to mixing tank, middle coal magnetic separator (10) is scanned de-mediated for the product of coal of centering coal sieve bend, the medium amount consumption that in reduction, product of coal is taken away, and middle coal magnetic concentrate returns to mixing tank, spoil magnetic separator (11), for the spoil of spoil sieve bend is scanned to de-mediated, reduces the medium amount consumption that spoil is taken away, and spoil magnetic concentrate returns to mixing tank,
Dewater unit, for the product after de-mediated is carried out to processed, to control product moisture, by arc dewatering screen, high-frequency oscillation dewatering screen, filtering centrifuge (18) combination, arc dewatering screen is by cleaned coal arc dewatering screen (12), middle coal arc dewatering screen (13) and spoil arc dewatering screen (14) form, high-frequency oscillation dewatering screen is by cleaned coal high-frequency oscillation dewatering screen (15), middle coal high-frequency oscillation dewatering screen (16) and spoil high-frequency oscillation dewatering screen (17) form, cleaned coal arc dewatering screen (12), for selected magnetic tailing is carried out to cleaned coal preliminary hydro-extraction, backwater feeds flotation, middle coal arc dewatering screen (13), carries out coal preliminary hydro-extraction for centering coal magnetic tailing, and backwater feeds concentrated, spoil arc dewatering screen (14), for spoil magnetic tailing is carried out to spoil preliminary hydro-extraction, backwater feeds concentrated, cleaned coal high-frequency oscillation dewatering screen (15), carries out second dehydration for the cleaned coal on selected arc dewatering screen, and backwater feeds flotation, middle coal high-frequency oscillation dewatering screen (16), carries out second dehydration for the coal on centering coal arc dewatering screen, and backwater feeds concentrated, spoil high-frequency oscillation dewatering screen (17), carries out second dehydration for the spoil on spoil arc dewatering screen, and backwater feeds concentrated, filtering centrifuge (18) is for carrying out final dewatering processing to the upper cleaned coal of selected high-frequency dewatering screen sieve, and to control final products moisture content index, centrifugate feeds flotation.
Mixing tank (3) in separation of coarse slime device of the present invention adopts post cone structure, is inside lined with wearing layer, and mixing tank bottom arranges batch mixing charging connector, in the middle of mixing tank, agitating device is set, and mixing tank (3) is provided with fluid level meter and filling pipe.
Separation of coarse slime device of the present invention adopts coarse slime heavy-media separator (5), by a segment body and bis body tandem compound, is formed, and one section arranges cone, taper angle theta 1 is 5 ° ~ 40 °, two sections arrange cone, and taper angle theta 2 is 5 ° ~ 90 °, 5 ° ~ 30 ° of setting angles.One section of front end arranges feed entrance and cleaned coal outlet, and two sections of one end are provided with middle coal export, and the other end is provided with spoil outlet, and wherein one or two sections of centres arrange passage.
The present invention can be provided with central control device, for corresponding link parameter is monitored and is adjusted, mainly comprise that densitometer, pressure sensor and servomotor form, mixing tank (3) and separator intermediate link density of setting meter, pressure sensor, densitometer is for monitoring the pan feeding pulp density of coarse slime heavy-media separator, to regulate and control the washing density of coal slime in dense media separator by adding medium and clear water in time; Pressure sensor is for monitoring the feed pressure of coal slime heavy-media separator, and servomotor is adjusted contactor pump frequency and controlled speed and the centrifugal intensity that material enters separator, regulates separation index, automatically controls product quality.
The present invention is for carrying out desliming, processed to black water, and to isolate cleaned coal, middle coal and spoil, its technique is as follows: adopt classifying cyclone (1) black water to be carried out to the classification of large or fine granule, the ore pulp amount of described black water is concentrated simultaneously, obtain being greater than high-concentration underflow and the low concentration overflow of 0.1mm grade, low concentration overflow contains a large amount of superfine coal slimes and enters flotation operation, the high-concentration underflow that is greater than 0.1mm grade enters arc dewatering screen (2), the overflow that the backwater of arc dewatering screen 2 is incorporated to classifying cyclone (1) feeds flotation operation, the oversize of arc dewatering screen 2 enters mixing tank (3), stir and obtain mixed slurry with adding into the dielectric suspensions in mixing tank (3), adopt contactor pump (4) that the mixed slurry in mixing tank (3) is squeezed into coal slime heavy-media separator (5), coal slime heavy-media separator (5) sub-elects cleaned coal slip by coarse slime material, middle coal charge slurry and spoil slip.
Wherein, cleaned coal slip enters arc sculping screen (6) and removes dielectric suspensions, under the sieve removing, dielectric suspensions enters the pipeline being connected with mixing tank (3), arc sculping screen (6) on-the-sieve material adds water spray dilution to feed cleaned coal magnetic separator (9) again, after cleaned coal magnetic separator (9) magnetic separation, enter arc dewatering screen (12), cleaned coal magnetic separator (9) magnetic separation recovering medium enters the pipeline being connected with mixing tank (3), the oversize slurry of arc sculping screen (12) enters high-frequency oscillation dewatering screen (15), the lower black water of arc dewatering screen (12) sieve enters floatation feed pipeline, the oversize of high-frequency oscillation dewatering screen (15) enters cleaned coal centrifuge (18), cleaned coal centrifuge (18) is 0.1-1.0mm specification sieve aperture, the lower black water of high-frequency oscillation dewatering screen (15) sieve enters floatation feed pipeline, cleaned coal centrifuge (18) is isolated cleaned coal and centrifugate, centrifugate enters floatation feed pipeline,
Wherein middle coal charge slurry and spoil slip enter arc sculping screen (7), under the sieve removing, dielectric suspensions enters the pipeline being connected with mixing tank (3), arc sculping screen (7), on-the-sieve material adds water spray dilution to feed magnetic separator (10) again, , middle coal magnetic separator (10), after magnetic separation, feed middle coal arc dewatering screen (13), middle coal magnetic separator (10) magnetic separation recovering medium enters the pipeline being connected with mixing tank (3), the oversize slurry of middle coal arc dewatering screen (13) enters high-frequency oscillation dewatering screen (16), under the sieve of middle coal arc dewatering screen (13) and middle coal high-frequency oscillation dewatering screen (16), together with black water, enter concentrated pipeline, concentrated pipeline is connected with concentration basin, high-frequency oscillation dewatering screen (16) oversize is final middle product of coal.
Spoil slip of the present invention can enter arc sculping screen (8), under the sieve removing, dielectric suspensions enters the pipeline being connected with mixing tank (3), arc sculping screen (8) on-the-sieve material adds water spray dilution to feed magnetic separator (11) again, after spoil magnetic separator (11) magnetic separation, feed spoil arc dewatering screen (14), spoil magnetic separator (11) magnetic separation recovering medium enters the pipeline being connected with mixing tank (3), the oversize slurry of spoil arc dewatering screen (14) enters high-frequency oscillation dewatering screen (17), under the sieve of spoil arc dewatering screen (14) and spoil high-frequency oscillation dewatering screen (17), together with black water, enter concentrated pipeline, concentrated pipeline is connected with concentration basin, high-frequency oscillation dewatering screen (17) oversize is final spoil.
Arc dewatering screen of the present invention (2), (6), (7), (8) adopt 0.1-1.0mm sieve aperture specification, and high-frequency oscillation dewatering screen (15), (16), (17) adopt 0.1-1.0mm specification sieve aperture,
Classifying cyclone 1 described in graded desliming system of the present invention, for black water is carried out to desliming, processed, obtains coarse fraction.Described classifying cyclone 1 adopts the principle of centrifugation, described coal slime is carried out to the classification of large or fine granule; The ore pulp amount of described black water is concentrated simultaneously, obtain the underflow of high concentration, and low concentration overflow.Overflow contains a large amount of superfine coal slimes and enters flotation operation, and high-concentration underflow feeds arc dewatering screen 2.
Arc dewatering screen 2 in described graded desliming system, the high-concentration underflow for the treatment of classifying cyclone 1, is mainly processed, for dense medium sorting provides the material of high concentration.The overflow that the backwater of arc dewatering screen 2 is incorporated to classifying cyclone 1 feeds flotation operation.The oversize of arc dewatering screen 2 feeds mixing tank 3,
In described mixing system, mixing tank 3, for collecting the oversize of described arc dewatering screen 3, and qualified medium suspension under arc sculping screen 6,7 and 8 sieve in Fig. 1, magnetic separator 9,10 and 11 concentrate in Fig. 1.Another described dense medium separation system add Jie, moisturizing all feeds described mixing tank 3.Mixing tank arranges air stirring, settlement prevention.
In described mixing system, contactor pump 4, for the mixture of described mixing tank 3 is squeezed into coal slime heavy-media separator 5.Described contactor pump 4 is the power source of described coal slime heavy-media separator 5.
The coarse slime material that in described coarse slime dense medium separation system, coal slime heavy-media separator 5 is squeezed into described contactor pump 4 sub-elects cleaned coal, middle coal and spoil, and coal slime heavy-media separator structure is shown in Fig. 2..The power that contactor pump 4 gives as described in rough coal mud coal and qualified suspension utilization, coarse slime is squeezed into the feeding mouth 503 of coal slime heavy-media separator 5 with certain speed, qualified suspension rotates and produces centrifugal force field in a segment body 501 of coal slime heavy-media separator 5, thereby the density forming from inside to outside increases progressively layering.In one segment body 501 of coal slime heavy-media separator 5, be formed centrally low-density rising inside spin stream, the highdensity decline external spiral stream of peripheral formation.Coarse slime is under the effect of density field and centrifugal force factory, in a segment body 501, by density separation, go out cleaned coal and heavy product, cleaned coal is discharged with the inside spin one section of accurate outlet 504 of flowing through, and heavy product and highdensity external spiral flow to into one or two sections of passages 507, and same principle sub-elects middle coal and spoil.The present invention has specific (special) requirements to coal slime heavy-media separator 5: adopt a segment body 501 and two sections to carry 502 two sections of disjunctor tandem compounds, two sections of cones configurations are set, auger corner structure, to improve separating effect.This coal slime heavy-media separator 5 does not have normal structure, must corresponding construction parameter be set coupling coarse slime character.
In described de-mediated system, arc sculping screen 6,7 and 8, the cleaned coal sub-electing for the treatment of coal slime heavy-media separator 5, and middle coal and spoil, remove the dielectric suspensions that described coal slime heavy-media separator 5 is discharged.Cleaned coal, middle coal and spoil on described arc sculping screen 6,7 and 8 sieve, be diluted with water and feed next link.Arc sculping screen 6,7 and 8 screenings are returned mixing tank 3 and are recycled.
In described de-mediated system, magnetic separator 9,10 and 11, and the oversize for alignment processing arc sculping screen 6,7 and 8, takes off magnetic and scan processing.Magnetic separator 9,10 and 11 magnetic concentrate are returned mixing tank 3 and are recycled, and magnetic separator 9,10 and 11 magnetic tailing feed next link.
In described dewatering system, arc dewatering screen 12,13 and 14, for the treatment of the magnetic tailing of magnetic separator 9,10 and 11, carry out the processed of emphasis, and oversize feeds next equipment.Under the sieve of cleaned coal arc dewatering screen 12, black water feeds flotation operation, and under the sieve of middle coal and spoil arc sculping screen 13,14, black water feeds slime water concentration system.
Described dewatering system medium-high frequency vibrating-dewatering screen 15,16 and 17, the oversize for the treatment of arc dewatering screen 12,13 and 14, carries out product second dehydration.Under the sieve of cleaned coal high-frequency oscillation dewatering screen 15, black water feeds flotation operation, and under the sieve of middle coal and spoil dither sculping screen 16,17, black water feeds slime water concentration system.
Cleaned coal centrifuge 18 in described dewatering system, for the final control to head coal product moisture, to reach product moisture requirement.The centrifugate of cleaned coal centrifuge 18 feeds floatation system, and cleaned coal centrifuge 18 rows' cleaned coal is final products.
The densitometer that described centralized control system arranges, feeds the density of suspending liquid of coal slime heavy-media separator 5, to control the separating density of coarse slime for monitoring contactor pump 4.As, density of suspending liquid is high, and product quality exceeds standard, and now should increase the water yield in mixing tank 3, reduces density; Density of suspending liquid is low, and product loss is large, now should reduce the water yield in mixing tank 3 or fill into high density and close Jie, improves density.
The pressure sensor of described centralized control system setting is for monitoring the material feeding speed that contactor pump 4 feeds coal slime heavy-media separator 5, to adjust suspension delamination degree and the enrichment in coal slime heavy-media separator 5, and the centrifugal intensity of coarse slime in coal slime heavy-media separator 5.
Sub-elect cleaned coal, middle coal and three kinds of product structures of spoil, can sub-elect two kinds of products of cleaned coal and tail coal as requested, flow process is shown in Fig. 2.At this, need 1. merge processing by de-mediated system flow, abandon 8-11-14-17 system job, the middle coal that coal slime heavy-media separator 5 is sub-elected, spoil and dielectric suspensions merging feed 7-10-13-16 system and unify operation.
Dewatering system of the present invention, 2. cleaned coal dehydration 12-15-18 system, can reduce work flow link by dewatering system flow process according to treating capacity, uses 12-18 system to process cleaned coal, controls moisture.
Above-mentioned enforcement is only for explanation separation system of the present invention; and be not the restriction to separation system of the present invention; relevant those skilled in the art; do not departing from the spirit and scope situation of separation system of the present invention; can also make a variety of changes and be out of shape; therefore all equivalent technical solutions also should belong to category of the present invention, and the scope of patent protection of separation system of the present invention should be limited by each claim.
Claims (6)
1. a coarse slime dense medium separation system, is characterized in that being comprised of graded desliming device, mixing device, separation of coarse slime device, de-mediated, dewater unit and control device, wherein:
Graded desliming device, is comprised of classifying cyclone (1) and arc dewatering screen (2), and the underflow head piece of cyclone (1) is connected with the import of arc dewatering screen (2) through pipeline,
Mixing device, place to mix coarse slime material, dielectric suspensions, the collection of adding medium and clear water, by mixing tank (3) and pump (4), formed,
Separation of coarse slime device, carries out sorting to coarse slime material, adopts coal slime heavy-media separator (6), according to final products requirement, sub-elects cleaned coal, middle coal and three kinds of products of spoil,
Medium-separation device, by arc sculping screen and magnetic separator, formed, arc sculping screen is divided into cleaned coal arc sculping screen (6), middle coal arc sculping screen (7) and spoil arc sculping screen (8), magnetic separator comprises cleaned coal magnetic separator (9), middle coal magnetic separator (10) and spoil magnetic separator (11), cleaned coal arc sculping screen (6) sieve mouth arranges water injector, middle coal arc sculping screen (7) sieve mouth arranges water injector, and spoil arc sculping screen (8) sieve mouth arranges water injector.
2. a kind of coarse slime dense medium separation system according to claim 1, it is characterized in that dewater unit is by arc dewatering screen, high-frequency oscillation dewatering screen, filtering centrifuge (18) combination, arc dewatering screen by cleaned coal arc dewatering screen (12), in coal arc dewatering screen (13) and spoil arc dewatering screen (14) form, high-frequency oscillation dewatering screen by cleaned coal high-frequency oscillation dewatering screen (15), in coal high-frequency oscillation dewatering screen (16) and spoil high-frequency oscillation dewatering screen (17) form.
3. a kind of coarse slime dense medium separation system according to claim 1, it is characterized in that the mixing tank (3) in separation of coarse slime device adopts post cone structure, inside be lined with wearing layer, mixing tank bottom arranges batch mixing charging connector, in the middle of mixing tank, agitating device is set, mixing tank (3) is provided with fluid level meter and filling pipe.
4. a kind of coarse slime dense medium separation system according to claim 1, it is characterized in that separation of coarse slime device adopts coarse slime heavy-media separator (5), by a segment body and bis body tandem compound, formed, one section arranges cone, taper angle theta 1 is 5 °～40 °, two sections arrange cone, and taper angle theta 2 is 5 °～90 °, 5 °～30 ° of setting angles.
5. a kind of coarse slime dense medium separation system according to claim 4, is characterized in that one section of front end arranges feed entrance and cleaned coal outlet, and two sections of one end are provided with middle coal export, and the other end is provided with spoil outlet, and wherein one or two sections of centres arrange passage.
6. a kind of coarse slime dense medium separation system according to claim 1, is characterized in that being provided with central control device, comprises densitometer, pressure sensor and servomotor, mixing tank (3) and separator intermediate link density of setting meter, pressure sensor.
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| CN106179717A (en) * | 2016-07-22 | 2016-12-07 | 中煤科工集团唐山研究院有限公司 | A kind of full level of thermal coal is selected in simplified heavy medium sorting process |
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| CN106179717A (en) * | 2016-07-22 | 2016-12-07 | 中煤科工集团唐山研究院有限公司 | A kind of full level of thermal coal is selected in simplified heavy medium sorting process |
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| CN109201319B (en) * | 2018-09-28 | 2019-11-05 | 中国矿业大学 | It is a kind of that based on shunting, individually processing reduces the technique that coal preparation plant's dense media consumes |
| CN109201319A (en) * | 2018-09-28 | 2019-01-15 | 中国矿业大学 | It is a kind of that based on shunting, individually processing reduces the technique that coal preparation plant's dense media consumes |
| CN109174439B (en) * | 2018-09-30 | 2019-11-05 | 中国矿业大学 | Dense media step strengthens the method for recycling in a kind of coal preparation technique |
| CN109174439A (en) * | 2018-09-30 | 2019-01-11 | 中国矿业大学 | Dense media step strengthens the method for recycling in a kind of coal preparation technique |
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| CN110170371A (en) * | 2019-05-10 | 2019-08-27 | 唐山森普工程设计有限公司 | Coarse slime dense medium separation system and method for separating |
| CN110170371B (en) * | 2019-05-10 | 2023-11-24 | 唐山森普工程设计有限公司 | Coarse coal slime heavy medium sorting system and sorting method |
| CN111135633A (en) * | 2020-03-10 | 2020-05-12 | 威海市海王科技有限公司 | Recycling and recycling treatment system and treatment process for silicon iron powder |
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