CN102442704B - Method for extracting magnetic materials and carbon from pulverized coal ash - Google Patents
Method for extracting magnetic materials and carbon from pulverized coal ash Download PDFInfo
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- CN102442704B CN102442704B CN201110286091.6A CN201110286091A CN102442704B CN 102442704 B CN102442704 B CN 102442704B CN 201110286091 A CN201110286091 A CN 201110286091A CN 102442704 B CN102442704 B CN 102442704B
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- charcoal
- ash
- dust
- magnetic materials
- flyash
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
A method for extracting magnetic materials and coal from pulverized coal ash relates to the technical field of pulverized coal ash separation and sequentially comprises the steps of: separating an ash material into a big non-ash material block and scattered pulverized coal ash; drying the scattered pulverized coal ash and then sending the dried ash to a dust collecting type vibrating screen; sending materials which are bigger than a certain reference material to a material loosening machine and sending the materials back to the dust collecting type vibrating screen after the material loosening process; and sending materials which are not bigger than the certain reference material to a magnetic separator to be divided into magnetism-free material ash and miscellaneous magnetic materials, wherein the magnetism-free material ash is subjected to one electric separation, the product thereof is divided into miscellaneous coals and ash, and the miscellaneous coals are subjected to a second electric separation to form coal and ash; the miscellaneous magnetic materials are sent to the magnetic separator to be magnetically separated into magnetism-free material ash and relatively pure magnetic materials; the relatively pure magnetic materials are collected; and the magnetism-free material ash and the magnetism-free materials are combined for a treatment. The invention has the advantages that magnetic materials and coal can be extracted from the pulverized coal ash, various materials contained in the pulverized coal ash are used comprehensively and additional values of the pulverized coal ash are improved.
Description
Technical field
The present invention relates to Ash-classification Technique field, further relate to a kind of method of extracting Magnetic Materials and charcoal from flyash.
Background technology
Analyze after testing various material compositions and content in the flyash that prior art forms: main component is silica (SiO
2), alundum (Al2O3) (Al
2o
3), di-iron trioxide (Fe
2o
3), calcium oxide (CaO), unburned charcoal (loss on ignition), also have the oxides such as a small amount of magnesium (Mg), titanium (Ti), potassium (K), phosphorus (P), sulphur (S).The oxides such as silica, aluminium oxide, titanium oxide come from sand, clay, shale and slate, and iron oxide is mainly from pyrite (FeS contained in coal
2) rear limonite ((FeO), the bloodstone (Fe forming of burning
2o
3) and magnetic iron ore (Fe
3o
4).Calcium oxide, magnesia etc. are from charcoal hydrochlorate, sulfate in mineral matter.The contained percentage of various material compositions is as follows: SiO
2containing 47% left and right, Al
2o
3containing 23% left and right, Fe
2o
3containing 5% left and right, CaO is containing 3.5% left and right, and MgO is containing 1.2% left and right, K
2o is containing 1.5% left and right, Na
2o is containing 1% left and right, SO
3containing 0.5% left and right, TiO
2containing 1.5% left and right, loss on ignition C is containing 13% left and right, and above data are being dried the analysis of doing without moisture, flyash moisture content approximately 10% left and right.
The existence of the charcoal in flyash not only wastes energy, and has a strong impact on the quality of flyash.Organic charcoal constituent poor stability, one to being considered to concrete harmful substance, because inertia charcoal part is increased, to cause flyash activity composition to reduce, charcoal can make concrete water requirement increase, packing reduces, and also can affect the volume of the additives such as water reducer and the color of concrete outward appearance and uniformity.Charcoal can be separated with slurry gradually in bleeding process, rises to concrete topping, the quality of influence surface layer concrete.If loss on ignition charcoal surpasses 8% in flyash, will have a strong impact on the control to concrete quality, charcoal (charcoal) is harmful components in flyash, and content is more low better, and concerning high-quality fly ash, maximum is preferably below 4%.China's flyash national Specification is 8% to the maximum.
Contained various Magnetic Materials (the various compounds of iron and the compound of titanium) in flyash, Magnetic Materials can extract with high-intensity magnetic separator, thereby improved the economic benefit of flyash recycling, increased the added value of refuse reclamation, realized the economic model of goods and materials cycling and reutilizations.
Therefore the technique that, Magnetic Materials and charcoal are extracted in research from flyash is necessary.
Summary of the invention
The object of the invention is for solving above-mentioned weak point, a kind of method of extracting Magnetic Materials and charcoal from flyash is provided, adopt the method, can realize and from flyash, extract Magnetic Materials and charcoal, thereby purification flyash, make the contained various materials of flyash obtain the comprehensive utilization of turning waste into wealth, and promoted the added value of flyash.
The object of the invention is to realize by following scheme:
A method of extracting Magnetic Materials and charcoal from flyash, is characterized in that: carry out successively following steps:
A send flyash material
to vibrating dust-collection type scattering machinein, and by machine upper end vibratory sieve, the non-charcoal thing of bulk is removed, then by machine lower end loose metal machine because of moist make flyash caking agglomerating break up loose metal;
B is dried the flyash of breaing up after loose metal;
C delivers to dust-collection type vibratory sieve by the flyash of oven dry, carries out varigrained sieving and grading (grading of material is specifically determined with different flyash);
(classification of each granularity is according to the difference of flyash and difference by being greater than 20 ± 10 object materials in c step for d, as the flyash classification that fluidized-bed combustion boiler produced wants thin, the flyash classification that coal-powder boiler produces can be relatively thick) enter loose metal machine, the dust-collection type vibratory sieve that is returned to c step after loose metal is processed carries out classification;
E, by being less than or equal to the material of the various sieving and gradings of 20 ± 10 object in c step, delivers to magnetic separator, through magnetic separation, is divided into except Magnetic Materials ash material and assorted Magnetic Materials;
F is by going to electrostatic separator and carry out electric separation one time except Magnetic Materials in e step, and after electrostatic separator electric separation, its product is divided into assorted charcoal and ash;
G will mix charcoal through secondary electric separation, form charcoal and ash, collect respectively, and the grey thing after collecting is ground by abrasive dust equipment (ball mill, eddy mill, Double roll crusher etc.), make the thin grey thing of finished product after reaching certain fineness; The charcoal of collecting and other combustibles (pitch, coal slime etc.) stir, are squeezed into the operations such as piece and make finished product charcoal piece;
H delivers to magnetic separator by the assorted Magnetic Materials in e step, is separated into except Magnetic Materials ash thing and purer Magnetic Materials after magnetic separation;
I collects purer Magnetic Materials;
J processing the magnetic ash thing merging that removes except in Magnetic Materials ash thing and f step in h step;
K at least each dusting equipment (not comprising feeder equipment and material-gathering device) operation time has cleaner to gather dust, and the thin grey material that dust collection device is collected is concentrated and carried out electric separation and carry charcoal.
Object of the present invention can further realize by following scheme:
In c step: be less than or equal to 20 ± 10 object materials, be further divided into two kinds: one, be less than or equal to 20 ± 10 orders, be more than or equal to 80 ± 20 object materials, they are two years old, (classification of each granularity is according to the difference of flyash and difference to be less than 80 ± 20 object materials, as the flyash classification that fluidized-bed combustion boiler produced wants thin, the flyash classification that other boiler produces can be relatively thick); Two kinds of materials carry out respectively step described later.
The electrostatic separator of a described electric separation distributes and refers to total Multi-roll internal circulation electrical separator arranged side by side, adopts one group of two or many electrostatic separator, between every group of electrostatic separator, dust-precipitator is set; After electrostatic separator electric separation, its product is divided into assorted charcoal and ash, and assorted charcoal carries out secondary electric separation.
The electrostatic separator of described secondary electric separation distributes and refers to have two or many electrostatic separators, and the assorted charcoal of every group of electrostatic separator discharge enters a wherein electrostatic separator.
In described above various processes (process), the dust of generation discharges after dust removal process; Specifically: the dust producing in drying course, the dust-collection type vibratory sieve course of work, the loose metal machine course of work, the magnetic separator course of work, the electrostatic separator course of work discharges collection after dust removal process, and the thin ash after collection concentrates electric separation to carry charcoal.
In described step a: flyash feed separation is become to the non-grey thing of bulk and breaks up rear flyash, adopt vibration loose metal machine to realize: concrete structure is: sieve lower end is three transfer rollers, the sequential blade-like blade of arranging on each transfer roller, the direction of rotation of middle transfer roller and upper and lower transfer roller switched in opposite, be conducive to beating of flyash dough to separate loose powder, the ash of beating after solution is conducive to dry and electric separation.The sieve aperture of the vibratory sieve of machine upper end can be changed as requested; Vibratory sieve can screen discharge the non-grey material of the large bulk mixing in ash.
The structure of described vibrating dust-collection type scattering machine is: at upper rack, be provided with charging aperture, charging aperture bottom is vibratory sieve A, vibratory sieve A is connected with frame by spring or rubber spring, vibratory sieve A is slant setting, itself and charging aperture contact site are relatively high, the opposite side corresponding with charging aperture is relatively low, forms impurity discharging port; On the top of vibratory sieve A, be provided with dedusting inlet scoop, dedusting inlet scoop is by pipeline communication dust-precipitator, and dust-precipitator is by pipeline connecting fan; Below vibratory sieve A, be provided with transfer roller, be provided with vibratory sieve B below transfer roller, vibratory sieve B below is for going out material strip; A side of vibratory sieve B is circulation loader, and vibratory sieve B screens the material after breaing up, and qualified material is delivered to out to material strip, and underproof material is delivered to charging aperture, carries out 2 circulations and breaks up.
The dedusting inlet scoop of described vibrating dust-collection type scattering machine is provided with two, and one is forward, is arranged at charging aperture place, another occupy vibratory sieve A directly over or back upper place.
The transfer roller of described vibrating dust-collection type scattering machine has three, below vibratory sieve A, is from top to bottom disposed with transfer roller A, transfer roller B, transfer roller C, the direction of rotation of middle transfer roller B and transfer roller A, transfer roller C switched in opposite.
The sequential blade of arranging sharp knife shape on the transfer roller of described vibrating dust-collection type scattering machine.
The present invention compared with the prior art, there is following beneficial effect: the flyash flow process of the present invention's design, can realize and from flyash, extract Magnetic Materials and charcoal, thus purification flyash, make the contained various materials of flyash obtain comprehensive utilization, and promoted the added value of flyash.Through reality measuring and calculating, process approximately 38 yuan of left and right of the required total cost of sorting flyash per ton, the total added value producing after flyash separating-purifying per ton amounts to 88 yuan of left and right, the flyash per ton 50 yuan of left and right that bring benefits, remarkable in economical benefits more.
The present invention specifically also has following advantage:
1, form a complete set of production line each production link system is coupled together, can realize automated production, reduce manually, reduce dust pollution, improve the efficiency of separation and purity.
2, this flow process is the Magnetic Materials Fe in ash
2o
3, Fe
3o
4and TiO
2also carry out sorting extraction, improved the added value of flyash, reduced sorting cost.Be conducive to the quality assurance of recycling.
3,, during equipment operation work, easily produce powder ash.The equipment that can produce dust to each in this technological process all gathers dust, and prevents that powder ash is at workshop internal contamination air.
4, multiple roll heating internal-circulation electrostatic separator arranged side by side, this machine is the twice of similar single-row electrostatic separator output.And save time, saving of labor, power saving, efficiency and purity high.This machine has dust collection device, can automatic dust-cleaning during operation and gather dust, and how many purification purity is decided by the roller that erects row.
Below by the case of Pangang Group Co., Ltd. and Datang kwan-yin rock hydroelectric development Co., Ltd's coal ash lifting charcoal and Magnetic Materials, description effect:
Coal ash lifting Fe
2o
3, Fe
3o
4, TiO
2with carbon removal sorting cost and sorting thing added value.
1, process the expense that flyash per ton produces.
(1) forklift approximately 1 yuan of left and right per ton.
(2) vibrating dust-collection type scattering machine and feeder operation totle drilling cost approximately 2 yuan of left and right per ton.
(3) dryer equipment calculates with flyash water content 10%, and after drying, water content is below 1%.Flyash per ton needs drying and processing 90 kg of water, per kilogram water needs to be about 0.5 kilogram with coal in drying course, 0.6 yuan, per kilogram coal, add up to 0.3 yuan of every evaporation 1 kg of water needs, in flyash per ton, contain 90 kg of water, flyash drying and processing expense per ton is 27 yuan of left and right, and oven dry operation power charge per ton is 5 yuan of left and right.Above oven dry expense amounts to 32 yuan of left and right.
(4) dust-collection type shakes and sieves and 0.5 yuan of left and right of magnetic separation total cost flyash per ton.
(5) other gathers dust and feeding cost 0.5 yuan of left and right per ton.
(6) flyash electric separation operating cost per ton is approximately 3 yuan.
(7) labour cost cost per ton and other expenditure are counted roughly 5 yuan.
Process in sum approximately 44 yuan of left and right of the required total cost of sorting flyash per ton.
2, the Fe that flyash per ton proposes
2o
3, Fe
3o
4, TiO
2value with C
(1) Fe
2o
3and TiO
2total content is in 6.5% left and right.Because two kinds of materials are but weak magnetic materials, need to use high-strength magnetic separation.Magnetic intensity, can be Fe with multiple roll high-intensity magnetic separator more than 10000GS
2o
3and TiO
2content is down to below 0.5% altogether, can be 6% Fe
2o
3and TiO
2put forward 6% Fe
2o
3and TiO
2the surcharge producing after proposing is 55 yuan of left and right.
(2) 11% left and right in flyash is down to below 7%, in flyash per ton, can be at least mentioned the powdered carbon of 40 kilograms.Because the charcoal in flyash forms after high-temperature roasting, the value of this type of charcoal is higher, and value per ton is per ton, or higher at 1100 yuan.By 1100 yuan of calculating per ton, 40 kilograms of surcharges are 44 yuan of left and right.
(3) the total added value producing after flyash separating-purifying per ton amounts to 99 yuan of left and right.
3, the added value that above total computing flyash per ton produces is 99 yuan-44 yuan=55 yuan.
Concrete numeral is to carry out budget with each material market price in March, 2011 above.
Accompanying drawing explanation
Fig. 1 is process route chart of the present invention,
Fig. 2 is vibration loose metal machine structural representation.
In figure: 1 is charging aperture, 2 is vibratory sieve A, and 3 is impurity discharging port, and 4 is transfer roller A, and 5 is transfer roller B, 6 is transfer roller C, and 7 is vibratory sieve B, and 8 for going out material strip, and 9 is circulation loader, and 10 is dedusting inlet scoop, 11 is control valve, and 12 is dust-precipitator, and 13 is dust-precipitator outlet, and 14 is blower fan.
The specific embodiment
In order to make those skilled in the art person understand better the present invention program, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with drawings and Examples, the present invention is further detailed explanation.
Embodiment 1:
As shown in Figure 1, by forklift or other machinery by flyash material material loading to vibrating dust-collection type scattering machine 1, this machine 1 becomes flyash feed separation the non-grey thing of bulk and breaks up rear flyash, the non-grey thing of bulk is placed pending; Break up rear flyash and be directed at dryer 3 by feeder 2, in dryer 3 drying courses, produce lightweight thing (gas with dust that material of lighter weight produces) and heavy thing (material that weight is larger), process respectively; Wherein,
Lightweight thing is directed at deduster 10 to carry out discharging after dust removal process;
Heavy thing imports loading head 4, and by feeder 5, delivers to dust-collection type vibratory sieve 6, and in dust-collection type vibratory sieve 6 courses of work, the vibratory sieve course of work produces lightweight thing and heavy thing, wherein,
Lightweight thing is directed at deduster 10 to carry out discharging after dust removal process, and the thin ashes of the discharge of gathering dust is concentrated and to be carried out electric separation and carry charcoal;
Heavy thing is divided into and is greater than 20 object materials by granular size, be less than or equal to 20 orders, be more than or equal to 80 object materials, be less than three kinds of 80 object materials (grading of material is specifically definite with different flyash, and the flyash that the present embodiment produces by coal-powder boiler carries out classification);
Wherein: be greater than 20 object materials through wheat flour detacher 7, loose powder process produces thin pledge and heavy thing, wherein,
Lightweight thing is directed at deduster 10 to carry out discharging after dust removal process, and the thin grey material of collecting discharge is concentrated and carried out electric separation and carry charcoal;
Heavy thing imports loading head 8, through feeder 9, is returned to dust-collection type vibratory sieve 6;
Be less than or equal to 20 orders, be more than or equal to 80 object materials, through feeder 11, deliver to magnetic separator 12, magnetic separation process forms lightweight thing and heavy substance, and lightweight thing is gathered dust by dust-precipitator 23A; Heavy thing is divided into two kinds: except Magnetic Materials ash (not containing Magnetic Materials) and assorted Magnetic Materials (containing Magnetic Materials), wherein,
Except Magnetic Materials ash is directed at feed bin 16 through promoting feeder 15, by feeding machine 17, be directed at electrostatic separator, electrostatic separator refers to four roller electrostatic separators arranged side by side (being 18A, 18B, 18C, 18D), between every two electrostatic separators, dust-precipitator 20A, 20B is set, be between four roller electrostatic separator 18A arranged side by side, 18B, dust-precipitator 20A is set; Between four roller electrostatic separator 18C arranged side by side, 18D, dust-precipitator 20B is set; Dust-precipitator is for the collection of dust; After electrostatic separator electric separation, its product is divided into assorted charcoal and ash, and assorted charcoal, through secondary electric separation, forms charcoal and ash, collects respectively.The assorted charcoal that secondary electric separation is specifically discharged from four roller electrostatic separator A, four roller electrostatic separator B enters secondary electrostatic separator 19A; The assorted charcoal of discharging from four roller electrostatic separator C, four roller electrostatic separator D enters secondary electrostatic separator 19B.
Assorted Magnetic Materials (containing Magnetic Materials ash) is delivered to magnetic separator 14 by feeder 13, lightweight thing and heavy thing that magnetic separation process forms, wherein,
Lightweight thing is gathered dust by dust-precipitator 23B;
Heavy thing is separated into except Magnetic Materials ash and purer Magnetic Materials after magnetic separation; Wherein,
Purer Magnetic Materials is collected;
Except Magnetic Materials ash is processed except Magnetic Materials merges with above-mentioned, except Magnetic Materials ash is directed at feed bin 16 through promoting feeder 15, by feeding machine 17, be directed at electrostatic separator, electrostatic separator refers to that the interior circulation electrostatic separator of multiple roll arranged side by side (the present embodiment provide be four rollers arranged side by side) (is 18A, 18B, 18C, 18D, the number of combinations of different output electrostatic separators is different), between every two or many electrostatic separators, dust-precipitator 20A, 20B are set, side by side between Multi-roll internal circulation electrical separator 18A, 18B, dust-precipitator 20A are set; Between Multi-roll internal circulation electrical separator 18C, 18D, dust-precipitator 20B is set side by side; Dust-precipitator is for the collection of dust; After electrostatic separator electric separation, its product is divided into assorted charcoal and ash, and assorted charcoal, through secondary electric separation, forms charcoal and ash, collects respectively.The assorted charcoal that secondary electric separation is specifically discharged from electrostatic separator A, electrostatic separator B enters secondary electrostatic separator 19A; The assorted charcoal of discharging from electrostatic separator C, electrostatic separator D enters secondary electrostatic separator 19B.
Be less than 80 object materials; Through feeder 21, deliver to magnetic separator 22, lightweight thing and heavy thing that magnetic separation process forms, lightweight thing is gathered dust by dust-precipitator 23A; Heavy thing comprises assorted Magnetic Materials (containing Magnetic Materials) and except Magnetic Materials ash (containing Magnetic Materials), wherein,
Assorted Magnetic Materials ash (containing Magnetic Materials ash) is delivered to magnetic separator 25 by feeder 24, and magnetic separation process forms lightweight thing and heavy thing, and lightweight thing is gathered dust by dust-precipitator 23B; Heavy thing is separated into purer Magnetic Materials and removes Magnetic Materials ash; Wherein,
Purer Magnetic Materials is collected;
Except Magnetic Materials ash is directed at feed bin 27 through promoting feeder 26, by feeding machine 28, be directed at electrostatic separator, electrostatic separator refers to Multi-roll internal circulation electric separation arranged side by side, electrostatic separator (number of combinations that is 29A, 29B, the different output electrostatic separators of 29C, 29D is different), between every two or many electrostatic separators, dust-precipitator 30A, 30B are set, be between electrostatic separator 29A arranged side by side, 29B, dust-precipitator 30A is set; Between electrostatic separator 29C, 29D, dust-precipitator 30B is set side by side; Dust-precipitator is for the collection of dust; After electrostatic separator electric separation, its product is divided into assorted charcoal and ash, and assorted charcoal, through secondary electric separation, forms charcoal and ash, collects respectively.The assorted charcoal that secondary electric separation is specifically discharged from electrostatic separator 29A, electrostatic separator 29B enters secondary electrostatic separator 31A; The assorted charcoal of discharging from electrostatic separator 29C, electrostatic separator 29D enters secondary electrostatic separator 31B.
That from magnetic separator 22, discharges processes except Magnetic Materials ash merges with above-mentioned except Magnetic Materials ash, through promoting feeder 26, be directed at feed bin 27, by feeding machine 28, be directed at electrostatic separator, electrostatic separator refers to Multi-roll internal circulation electric separation arranged side by side, electrostatic separator (number of combinations that is 29A, 29B, the different output electrostatic separators of 29C, 29D is different), between every two or many electrostatic separators, dust-precipitator 30A, 30B are set,, between electrostatic separator 29A, 29B, dust-precipitator 30A are set; Between electrostatic separator 29C, 29D, dust-precipitator 30B is set; Dust-precipitator is for the collection of dust; After electrostatic separator electric separation, its product is divided into assorted charcoal and ash, and assorted charcoal, through secondary electric separation, forms charcoal and ash, collects respectively.The assorted charcoal that secondary electric separation is specifically discharged from electrostatic separator 29A, electrostatic separator 29B enters secondary electrostatic separator 31A; The assorted charcoal of discharging from electrostatic separator 29C, electrostatic separator 29D enters secondary electrostatic separator 31B.
In the present embodiment:
A, forklift send into material in large-scale vibrating dust-collection type scattering machine 1, to carry out loose powder and beat and untie.And the vibratory sieve by this machine upper end is removed the non-grey thing of bulk.The structure of vibration loose metal machine 1 as shown in Figure 3, specifically has: vibration loose metal machine 1 is designed to three rotors and reverses mutually, on each rotor, is blade-like, is beneficial to and beats loose agglomerating flyash.
B, dryer 3 preferably use air current drying machine, because type oven dry output is high.The features such as dry tenacity is large, and drying time is short, and precipitation range is large, simple in structure, and floor space is little, less energy consumption.Every per hour can be maximum 5-6 tons.And boiling type drying machine mainly yields poorly, power consumption is large, complex structure.
C, dust-collection type vibratory sieve 6 carry out classification material, being greater than 20 order granularity materials, again by 7 wheat flour detachers, break up out, and each material after classification is carried out to magnetic separation.
D, magnetic separator 12 and magnetic separator 22 carry out magnetic separation the material after classification by high strength multiple roll magnetic separator, and each Magnetic Materials in flyash is extracted.More than magnetic field intensity is preferably in 10000GS.Magnetic Materials, by repeatedly magnetic separation, is purified to purer magnetisable material.Each magnetic separator has cleaner, and magnetic separator can be listed as many to carry out.
Flyash except Magnetic Materials after E, magnetic separation is sent in large feed bin 16 and feed bin 27 by elevator charging equipment, is each electrostatic separator sorting feed.Feed bin can be many electrostatic separator feed.
F, electrostatic separator 18 and electrostatic separator 29 series are respectively Multi-roll internal circulation electrical separator arranged side by side.This type possesses outside other kinds electrostatic separator advantage, and output is the twice of similar single-row type.Have save time, saving of labor, power saving, efficiency and purity high.In its type feed bin bucket, there are two automatic feeder systems lower end, can be is simultaneously roller feeding separately.In machine, bin system, slide plate vibration feeder system, transfer roller system are all provided with heating system, can heat dehumidifying to material, improve the efficiency of separation, and in machine, each adjustable plate can regulate sorting requirement at any time.This machine also has the material loading circulatory system, can be quantitatively machine feed.Each electrostatic separator equipment that gathers dust, when machine moves, dust collection device gathers dust to each machine.Because the charcoal purity sub-electing is not high, can again carry out sorting purification, go directly till require.
Embodiment 2:
The present embodiment 1 is the simplification of embodiment 2, wherein, by being less than or equal to 20 orders, being more than or equal to 80 object materials described in embodiment 1, and is less than 80 object materials; Merge into and be less than or equal to 20 object materials, by being less than or equal to 20 orders, the 80 object material modes that are more than or equal to process (granularity with dissimilar flyash sieving and grading is also different).
Described in the present embodiment 1, vibrating dust-collection type scattering machine structure is as follows:
As shown in Figure 2, vibrating dust-collection type scattering machine, is mainly applicable to various powder class materials or graininess material because of humidity conglomeration, need to break up and loosens and remove bulk foreign material.
At upper rack, be provided with charging aperture 1, charging aperture 1 is for adopting certain charging equipment to carry out material loading to this machine; Charging aperture 1 bottom is vibratory sieve A2, and vibratory sieve A2 is connected with frame by spring or rubber spring, this sieve the material entering remove bulk foreign material simultaneously to material also have a loose effect of shaking, the sieve aperture of this machine vibration can be according to the difference of material and set aperture; Vibratory sieve A2 is slant setting, and itself and charging aperture 1 contact site are relatively high, and the opposite side corresponding with charging aperture 1 is relatively low, forms impurity discharging port 3, for by outside bulk foreign material discharge machine; On the top of vibratory sieve A2, be provided with dedusting inlet scoop 10, dedusting inlet scoop 10 is provided with two, and one is forward, is arranged at charging aperture 1 place, another occupy vibratory sieve A2 directly over or back upper place; Dedusting inlet scoop 10, in material loading and vibration, is carried out air draught and is gathered dust.Dedusting inlet scoop 10 is by pipeline communication dust-precipitator 12, and dust-precipitator 12 can filter the dust producing to gather dust; Dust-precipitator 12 bottoms are provided with dust-precipitator outlet 13, for the particulate dust of collecting is collected to discharge.On air-suction duct, be provided with control valve 11, can carry out air quantity adjustment; Dust-precipitator 12 is by pipeline connecting fan 14.14 pairs of dedustings of blower fan and dust collecting system are carried out air inducing also outside the Bas Discharged machine after filtration, purification.
Below vibratory sieve A2, be from top to bottom disposed with transfer roller A4, transfer roller B5, transfer roller C6, the structure of three transfer rollers is identical, the sequential blade of arranging sharp knife shape on each transfer roller, is conducive to the breaing up and reduce the damage to raw material of material, thereby reduces to reduce energy consumption with the CONTACT WITH FRICTION of material simultaneously, the direction of rotation of middle transfer roller B5 and upper transfer roller A4, lower transfer roller C6 switched in opposite, be conducive to the material of conglomeration to beat and separate loose powder.
Below transfer roller, be provided with vibratory sieve B7,, for going out material strip 8, collect outward for the qualified material under sieve is outputed to machine by this machine vibratory sieve B7 below.A side of vibratory sieve B7 is circulation loader 9, and vibratory sieve B7 screens the material after breaing up, and after the defective material of not breaing up is sifted out, discharge machine enters circulation loader 9 outward, and sieve aperture can be adjusted slot size according to the requirement to material.Loader 9 is responsible for the material of not breaing up to deliver to charging aperture, carries out 2 circulations and breaks up.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.
Claims (10)
1. from flyash, extract a method for Magnetic Materials and charcoal, it is characterized in that: carry out successively following steps:
A delivers to flyash material in vibrating dust-collection type scattering machine, and by machine upper end vibratory sieve, the non-charcoal thing of bulk is removed, then by machine lower end loose metal machine because of moist make flyash caking agglomerating break up loose metal;
B is dried the flyash of breaing up after loose metal;
C delivers to dust-collection type vibratory sieve by the flyash of oven dry, carries out varigrained sieving and grading;
D enters loose metal machine by being greater than 20 ± 10 object materials in c step, and the dust-collection type vibratory sieve that is returned to c step after loose metal is processed carries out classification;
E, by being less than or equal to the material of the various sieving and gradings of 20 ± 10 object in c step, delivers to magnetic separator, through magnetic separation, is divided into except Magnetic Materials ash material and assorted Magnetic Materials;
F is by going to electrostatic separator and carry out electric separation one time except Magnetic Materials in e step, and after electrostatic separator electric separation, its product is divided into assorted charcoal and ash;
G will mix charcoal through secondary electric separation, form charcoal and ash, collect respectively, and the grey thing after collecting is ground by abrasive dust equipment, make the thin grey thing of finished product after reaching certain fineness; The charcoal of collecting and other combustibles stir, are squeezed into the operations such as piece and make finished product charcoal piece;
H delivers to magnetic separator by the assorted Magnetic Materials in e step, is separated into except Magnetic Materials ash thing and purer Magnetic Materials after magnetic separation;
I collects purer Magnetic Materials;
J processing the magnetic ash thing merging that removes except in Magnetic Materials ash thing and f step in h step;
K at least has cleaner to gather dust during the operation of each dusting equipment, and the thin grey material that dust collection device is collected is concentrated and carried out electric separation and carry charcoal.
2. the method for extracting Magnetic Materials and charcoal from flyash according to claim 1, it is characterized in that: in c step: be less than or equal to 20 ± 10 object materials, be further divided into two kinds: one, be less than or equal to 20 ± 10 orders, be more than or equal to 80 ± 20 object materials, its two, be less than 80 ± 20 object materials; Two kinds of materials carry out respectively step described later.
3. the method for extracting Magnetic Materials and charcoal from flyash according to claim 1, it is characterized in that: the electrostatic separator of an electric separation distributes and refers to total Multi-roll internal circulation electrical separator arranged side by side, adopt one group of two or many electrostatic separator, between every group of electrostatic separator, dust-precipitator is set; After electrostatic separator electric separation, its product is divided into assorted charcoal and ash, and assorted charcoal carries out secondary electric separation.
4. the method for extracting Magnetic Materials and charcoal from flyash according to claim 3, is characterized in that: the electrostatic separator of secondary electric separation distributes and refers to have two or many electrostatic separators, and the assorted charcoal of every group of electrostatic separator discharge enters a wherein electrostatic separator.
5. the method for extracting Magnetic Materials and charcoal from flyash according to claim 1, is characterized in that: in above variety of processes, the dust of generation discharges after dust removal process; Specifically: the dust producing in drying course, the dust-collection type vibratory sieve course of work, the loose metal machine course of work, the magnetic separator course of work, the electrostatic separator course of work discharges collection after dust removal process, and the thin ash after collection concentrates electric separation to carry charcoal.
6. the method for extracting Magnetic Materials and charcoal from flyash according to claim 1, it is characterized in that: in step a: loose metal facility body structure is: sieve lower end is three transfer rollers, the sequential blade-like blade of arranging on each transfer roller, the direction of rotation of middle transfer roller and upper and lower transfer roller switched in opposite.
7. the method for extracting Magnetic Materials and charcoal from flyash according to claim 1, it is characterized in that: the structure of vibrating dust-collection type scattering machine is: at upper rack, be provided with charging aperture, charging aperture bottom is vibratory sieve A, vibratory sieve A is connected with frame by spring, vibratory sieve A is slant setting, itself and charging aperture contact site are relatively high, and the opposite side corresponding with charging aperture is relatively low, form impurity discharging port; On the top of vibratory sieve A, be provided with dedusting inlet scoop, dedusting inlet scoop is by pipeline communication dust-precipitator, and dust-precipitator is by pipeline connecting fan; Below vibratory sieve A, be provided with transfer roller, be provided with vibratory sieve B below transfer roller, vibratory sieve B below is for going out material strip; A side of vibratory sieve B is circulation loader, and vibratory sieve B screens the material after breaing up, and qualified material is delivered to out to material strip, and underproof material is delivered to charging aperture, carries out 2 circulations and breaks up.
8. the method for extracting Magnetic Materials and charcoal from flyash according to claim 7, it is characterized in that: the dedusting inlet scoop of described vibrating dust-collection type scattering machine is provided with two, one is forward, is arranged at charging aperture place, another occupy vibratory sieve A directly over or back upper place.
9. the method for extracting Magnetic Materials and charcoal from flyash according to claim 7, it is characterized in that: the transfer roller of described vibrating dust-collection type scattering machine has three, below vibratory sieve A, be from top to bottom disposed with transfer roller A, transfer roller B, transfer roller C, the direction of rotation of middle transfer roller B and transfer roller A, transfer roller C switched in opposite.
10. according to the method for extracting Magnetic Materials and charcoal from flyash described in claim 7 or 9, it is characterized in that: the sequential blade of arranging sharp knife shape on the transfer roller of described vibrating dust-collection type scattering machine.
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| CN201110286091.6A CN102442704B (en) | 2011-09-24 | 2011-09-24 | Method for extracting magnetic materials and carbon from pulverized coal ash |
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| CN201110286091.6A CN102442704B (en) | 2011-09-24 | 2011-09-24 | Method for extracting magnetic materials and carbon from pulverized coal ash |
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| CN102442704B true CN102442704B (en) | 2014-11-05 |
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| CN105665123B (en) * | 2016-03-02 | 2018-01-26 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of flyash pre-selection iron ore concentrate upgrades, reduces SiO2The method of content |
| CN109433794A (en) * | 2018-11-02 | 2019-03-08 | 湖北亚首生物质新能源科技有限公司 | Domestic garbage pyrolysis processing system and method |
| CN112893391A (en) * | 2020-12-30 | 2021-06-04 | 中国矿业大学 | Dry separation process and system for gasification furnace slag |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3533819A (en) * | 1967-12-04 | 1970-10-13 | Enercon Int Ltd | Process for the treatment of fly ash and product |
| CN1583293A (en) * | 2003-08-18 | 2005-02-23 | 郑州大学 | Separating and extracting apparatus high-additional value mineral from dry flyash |
| CN101077487A (en) * | 2007-06-21 | 2007-11-28 | 北京科技大学 | Fly ash charcoal-removing parallel plate electrostatic separator and friction charged electrostatic field sorting process |
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2011
- 2011-09-24 CN CN201110286091.6A patent/CN102442704B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3533819A (en) * | 1967-12-04 | 1970-10-13 | Enercon Int Ltd | Process for the treatment of fly ash and product |
| CN1583293A (en) * | 2003-08-18 | 2005-02-23 | 郑州大学 | Separating and extracting apparatus high-additional value mineral from dry flyash |
| CN101077487A (en) * | 2007-06-21 | 2007-11-28 | 北京科技大学 | Fly ash charcoal-removing parallel plate electrostatic separator and friction charged electrostatic field sorting process |
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