CN102491357B - Superfine kaolin production system and use method thereof - Google Patents
Superfine kaolin production system and use method thereof Download PDFInfo
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- CN102491357B CN102491357B CN 201110404539 CN201110404539A CN102491357B CN 102491357 B CN102491357 B CN 102491357B CN 201110404539 CN201110404539 CN 201110404539 CN 201110404539 A CN201110404539 A CN 201110404539A CN 102491357 B CN102491357 B CN 102491357B
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- 239000005995 Aluminium silicate Substances 0.000 title claims abstract description 122
- 235000012211 aluminium silicate Nutrition 0.000 title claims abstract description 122
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 107
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- 238000000227 grinding Methods 0.000 claims description 65
- 239000002245 particle Substances 0.000 claims description 40
- 239000002002 slurry Substances 0.000 claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 239000004411 aluminium Substances 0.000 claims description 31
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 31
- 229910052782 aluminium Inorganic materials 0.000 claims description 31
- 239000000919 ceramic Substances 0.000 claims description 31
- 239000003795 chemical substances by application Substances 0.000 claims description 24
- 239000006185 dispersion Substances 0.000 claims description 24
- 238000001354 calcination Methods 0.000 claims description 14
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- 239000000463 material Substances 0.000 abstract description 72
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- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical group [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
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- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 description 1
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Images
Abstract
The invention provides a superfine kaolin production system and a use method thereof. The superfine kaolin production system comprises a crusher and a superfine grinder which are sequentially connected. The superfine kaolin production system further comprises a wet grinding machine, kaolin entering the wet grinding machine is crushed by the crusher to be smaller than 50 mm in grain size, and the kaolin enters the superfine grinder after coming out from the wet grinding machine. By adopting the superfine kaolin production system to produce kaolin, yield per hour is 10.5 tons, and when kaolin is coarse grinded to be 325 meshes, each ton of products consumes 50 kilowatt hour of electricity. In addition, when materials are superfine grinded to be with more than 90% of the materials smaller than 2 um m in grain size, each ton of products consumes only 90 kilowatt hour of electricity. The superfine kaolin production system further has functions of reducing dust and noise.
Description
Technical field
The present invention relates to the kaolin production system, be specifically related to ultrafine kaolin production system and using method thereof.
Background technology
The kaolin main component is silicate, wherein Al
2O
3Content is 37.5-44.5%, SiO
2Be 44.8-53.1%, and contain the oxide compound of a spot of iron, sodium, potassium, titanium, calcium, magnesium.Because its color distinction is big, chemical property stable, low price, strong covering power, thereby has extensively been applied to pottery, water-miscible paint, emulsion paint and paper industry and weaving coating.Obtain product thereby the Coaseries kaolin raw ore needs through broken, dry method or wet milling, join slurry, wet method super-fine ore grinding, drying, depolymerization, calcining, depolymerization.But before joining slurry, all habitually raw material is treated to the particle below 325 orders in the existing technology, the Chang Xianyong jaw crusher is treated to the particle of 30mm in this step, and then with Raymond mill with its corase grind to 325 orders, perhaps use hammer mill to be crushed to less than 5mm, in dry method ball mill, be milled to 325 orders again; Afterwards again with water, dispersant after the preparation slip get ready for entering wet method super-fine mill.But mineral must be through dry grinding before wet-milling for such production system, reducing its particle diameter, and dry mill process energy consumption height, the equipment noise is big, influences environment.
Summary of the invention
The object of the present invention is to provide ultrafine kaolin production system and using method thereof, this system energy consumption is low, the little output of dust pollution is big.
Ultrafine kaolin production system provided by the invention comprises: crusher and super grinder, crusher is connected successively with super grinder in the system, system also comprises the wet method grinding machine, the kaolin that enters the wet method grinding machine for through crusher in crushing to the kaolin of particle diameter less than 50mm, the kaolin of ball mill by wet process output enters super grinder.
Further, enter the kaolin particle diameter of wet method grinding machine less than 5mm.
Further, the wet method grinding machine be in ball mill by wet process, wet method rod mill, wet method tuber grinder, the wet method sand mill any
Further, used grinding medium is middle aluminium Ceramic Balls in the ball mill by wet process; The middle aluminium Ceramic Balls of diameter 30～50mm accounts for 65～70% of middle aluminium Ceramic Balls total amount in the middle aluminium Ceramic Balls; The middle aluminium Ceramic Balls of diameter 50～70mm accounts for 25～30% of middle aluminium Ceramic Balls total amount; The middle aluminium Ceramic Balls of diameter 70～100mm accounts for 2～5% of described middle aluminium Ceramic Balls total amount.
Further, fixed interval connects a plurality of bin isolation boards in the cavity of ball mill by wet process, and bin isolation board and ball mill by wet process inwall surround a plurality of chambers, and middle aluminium Ceramic Balls places chamber; A plurality of through holes that are of a size of 2～12mm are set on the bin isolation board.
Further, crusher is jaw crusher or hammer mill.
Further, crusher comprises jaw crusher and the hammer mill of series connection.
The present invention also provides the using method of said system on the other hand, the kaolin raw ore after fragmentation particle diameter less than 50mm; Be to mix at 1～3: 1 by weight by kaolin and water, add dispersant again and grind by ball mill by wet process, when particle diameter in the kaolin that ball mill by wet process grinds account for less than 325 purpose kaolin the kaolin cumulative volume that grinds 95～99% after discharging; Add water in the above-mentioned gained feed liquid again with dispersion agent after join slurry, join slurry solid content be 48～52%; The gained feed liquid is through deironing processing, extra-fine grinding, drying, depolymerization, calcining, depolymerization obtains kaolin powder finished product again in the previous step.
Further, the kaolin raw ore after fragmentation particle diameter less than 5mm.
Further, the add-on of dispersion agent by processing kaolin weight 1～4 ‰.
Technique effect of the present invention is:
Production system provided by the invention, can handle particle diameter less than the kaolin of 5mm with ball mill by wet process, after ball mill by wet process grinds, gained kaolin particle diameter is less than 325 orders, thereby having substituted traditional dry method pulverizer in this treatment step has realized cutting down the consumption of energy and has reduced the purpose of polluting, when adopting this system to produce corase grind kaolin to 325 order, product power consumption 50 degree per ton.When material extra-fine grinding 90% above material particular diameter to the material was＜2 μ m, product power consumption per ton is 90 degree only, also have the minimizing dust, reduce the effect of noise.
The invention provides the automatic production that the ultrafine kaolin production system can realize that kaolin grinds system only needs can realize automatic production in preliminary setting parameter scope on the setter by the control of the coordination between tstr and controller and production unit, thereby reduce manually, reduce cost.
The invention provides the input on the production system minimizing equipment purchasing, reduce production costs, and be under φ 2.2 * 7.5m ball mill by wet process situation of producing in single device, output also increase be twice above, hourly output can reach 10.5 tons under the butt condition being converted to, and has improved production efficiency.Wherein discharging condition by account for less than 325 purpose kaolin grinding kaolin cumulative volume 95～99%.
The invention provides the kaolin production system, when adopting this system to produce, used dispersion agent only by processing kaolin weight 1～4 ‰, in wet method corase grind process, under the effect of water, dispersion agent, grinding medium, water can rapid osmotic in the slit of kaolin itself, the quickening particle speed that attenuates.A large amount of tiny particles can reduce the viscosity of kaolin slurry, thereby have reduced the consumption of dispersion agent.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide further understanding of the present invention, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not constitute improper restriction of the present invention.
Fig. 1 is the ultrafine kaolin production system schematic flow sheet of first embodiment provided by the invention;
Fig. 2 is used ball mill by wet process structural representation among first embodiment provided by the invention;
Fig. 3 is the ultrafine kaolin production system schematic flow sheet of second embodiment provided by the invention;
Fig. 4 is the ultrafine kaolin production system schematic flow sheet of the 3rd embodiment provided by the invention; And
Fig. 5 is the ultrafine kaolin production system schematic flow sheet of the 4th kind of embodiment provided by the invention.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
The present invention handles kaolin raw ore particle diameter less than 200mm.Handle gained kaolin product particle diameter by native system and can reach 1250 orders～6000 orders, can reach the standard of ultrafine kaolin.Used wet method grinding machine be finger in wetting material by adopting sphere, bar-shaped, equipment that sand shape grinding medium grinds material.
System embodiment
Fig. 1 is the kaolin production system of first embodiment of the invention, and in this production system, the kaolin raw ore is after crusher 1 fragmentation, and median size enters afterwards in the ball mill by wet process 3 and grinds less than 5mm.The kaolin particle diameter is reduced to 325 orders after ball mill by wet process 3 grinds, enter again through magnetic separator de-ironing afterwards and carry out regrinding in the super grinder 9, further reduce kaolinic particle diameter to＜2 μ m, the kaolin of particle diameter＜2 μ m account for the kaolin total amount of handling 90% after, carrying out obtaining particle diameter after drying, depolymerization, the calcining is 6000 orders again, obtains whiteness greater than 93% kaolin powder.
In the first embodiment, this production system comprise crusher 1, the feed bin 2 that is connected with crusher 1, ball mill by wet process 3, hold-up vessel 4, water receiver 5, transition stirred pot 61, be connected with transition stirred pot 61 join slurry stirred pot 62, with join deironing system 7, the extra-fine grinding surge tank 8 that is connected with deironing system 7 that slurry stirred pot 62 is connected, reach the super grinder 9 that is connected with extra-fine grinding surge tank 8.Hold-up vessel 4 is used for storing dispersion agent, and hold-up vessel 4 all links to each other with the opening for feed of ball mill by wet process 3 with water receiver 5.The discharge port of ball mill by wet process 3 links to each other with transition stirred pot 61.Water receiver 5 respectively with transition stirred pot 61 with join slurry stirred pot 62 and be connected, with respectively to this transition stirred pot 61 with join and starch stirred pot 62 and send water.Join slurry stirred pot 62 and link to each other with water receiver 5 by motor-driven control valve 52, deironing system 7 starches stirred pot 62 and links to each other with joining by densitometer 71.
Used crusher 1 is that jaw crusher and hammer mill series connection are used, but is not limited thereto, and also can be the two independent use.When crusher is jaw crusher and hammer mill series connection use, can improve discharging efficient, save the production time.Kaolin through fragmentation leaves in the feed bin 2, so that serialization can guarantee the inlet amount abundance in producing.Feed bin 2 is towards weighing belt 211 feeds, and the delivery rate of weighing belt 211 is constant to be 13t/h.Weighing belt 211 feeds back to flow PID adjusting apparatus with measured inlet amount.Magnetic flow meter 51 links to each other with water receiver 5, magnetic flow meter 51 is given the PID adjusting apparatus with measured signal feedback, PID adjusting apparatus output regulation signal is given motor-driven control valve 52, regulates flooding quantity by motor-driven control valve 52, makes that the ratio of water to material in the ball mill by wet process 3 reaches preset ratio.Dispersion agent hold-up vessel 4 links to each other with volume pump 31, this volume pump 31 obtains from the numerical signal of the inlet amount of weighing belt 211 feedbacks, and by the calculating of PID adjusting apparatus, make the dispersion agent and the inlet amounies that enter in the ball mill by wet process 3 reach preset ratio, thereby realize automated operation.
Realize automatic control to inlet amount, amount of water and dispersion agent add-on by common as the PID adjusting apparatus in the present embodiment.
The ball mill of ball mill by wet process 3 for adopting the spherical grinding medium that moist material is ground as metallic ore ball mill by wet process, coal water slurry ball mill by wet process and cement ball mill by wet process, but is not limited to listed ball mill type.Compare with traditional kaolin production system, system provided by the invention with wet method grinding machine 3 for the treatment of the kaolin of particle diameter less than 5mm, thereby avoid using the dry method grinding machine to exist dust many, the problem that energy consumption is high.
Please refer to Fig. 2, the feeding mouth 39 of ball mill by wet process 3 is higher than plane, ball mill barrel axis place, is conducive to improve pan feeding speed.Be provided with multistage bin isolation board 35 in the ball mill by wet process 3.By bin isolation board 35 is set, ball mill by wet process 3 is divided into a plurality of chambers, material particular diameter that each chamber is handled successively decreases successively from feeding mouth 39, can improve mill efficiencies at different levels, shortens the production time.According to the particle diameter difference of grinding material and grinding mediums at different levels, a plurality of through holes that are of a size of 2～12mm are set on the bin isolation board 35, prevent that grinding medium from mixing.Shape of through holes is not limit herein, can be bar shaped for circle, as long as size satisfies this requirement.For manhole, size refers to the diameter that this is circular, and for strip through-hole, size refers to that the minor face of this through hole is long.When through hole be other when irregularly shaped, size refers to the shortest distance between arbitrary both sides.Can be so that the particle diameter of the grinding medium of placing successively decreases step by step in each chamber.The inwall of the cylindrical shell 33 of ball mill by wet process 3 is provided with liner plate 34, with protection cylindrical shell 33 inwalls, avoids institute's material of handling and grinding medium to the wearing and tearing of cylindrical shell 33, thus the work-ing life of prolongation ball mill by wet process 3.Bin isolation board 35 and liner plate 34 all adopt rubber-like macromolecular material or wear-resisting steel to make, as rubber, manganese steel, high chromium steel but be not limited thereto.Adopt this class material to make this liner plate 34 and bin isolation board 35 have advantages such as shock resistance is corrosion-resistant, wear-resistant, thereby this parts long service life, and noise is low in producing.
Ball mill by wet process 3 arranges guide spiral 32 at the inwall near feeding mouth 39 places of cylindrical shell 33, in order to can make material fast by entering cylindrical shell 33 inside during charging.On the other hand, at the inwall place near ball mill by wet process 3 discharge ports discharging spiral 36 is set, this discharging spiral 36 can accelerate to handle back material release, in order to enhance productivity.
Ball mill by wet process 3 arranges control sieve 37 at the discharge port place, used control sieve 37 joins with cylindrical shell 33 discharge ports.When ball mill by wet process 3 running, control sieve 37 rotate synchronously with ball mill by wet process 3, in order to can in time will meet the material derivation of particle diameter requirement.The aperture of this control sieve 37 is 20～40 orders, and set control sieve 37 can avoid grinding medium to leak outside in process of lapping, has reduced the step of separating grinding medium.
Handle the kaolin particle diameter of back 95～99% less than 325 orders through ball mill by wet process 3.
In the ball mill by wet process 3 used grinding medium can for steel ball or middle aluminium Ceramic Balls be preferably in the aluminium Ceramic Balls.When selecting the middle aluminium Ceramic Balls of different-grain diameter for use, at first to select to have the ballstone of enough hardness, folding strength, resistance to impact shock, weight and proportion, if the hardness of ballstone, folding strength, resistance to impact shock deficiency, ballstone breakage rate height, changing ballstone frequently then can influence production efficiency raising production cost.If the weight of ballstone and proportion are not suitable for, then can make the quality product of grind not reach to require or mill efficiency low, thereby when guaranteeing to grind the particle diameter of back discharging, also need consider production efficiency, to reduce the loss of grinding medium as far as possible.
And if the diameter mismatch of selected grinding medium then can make material can not get abundant grinding, and discharging is slow.The ratio of the aluminium Ceramic Balls of choosing is: the middle aluminium Ceramic Balls of diameter 30～50mm accounts for 65～70% of middle aluminium Ceramic Balls total amount; The middle aluminium Ceramic Balls of diameter 50～70mm accounts for 25～30% of middle aluminium Ceramic Balls total amount; The middle aluminium Ceramic Balls of diameter 70～100mm accounts for 2～5% of described middle aluminium Ceramic Balls total amount.Be divided into first chamber, second chamber and the 3rd chamber that adjoins each other by bin isolation board 35 from feeding mouth 39 to discharge port in preferred ball mill by wet process 3 chambeies.Mix the middle aluminium Ceramic Balls of placing above-mentioned three kinds of diameters in first chamber to the, three chambers respectively.Make the median size of the aluminium Ceramic Balls place first chamber greater than all the other two Room.The median size of aluminium Ceramic Balls is greater than the 3rd chamber in second chamber.Can guarantee in this embodiment serialization produce in product cut size control at 95～99% kaolin particle diameter less than 325 orders.
The kaolin that grinds through ball mill by wet process 3 enters in the transition stirred pot 61, and transition stirred pot 61 is used for regulating the material solid content.Whipping appts also is set, in case water and kaolin layering in the material when leaving standstill in the transition stirred pot 61.On the transition stirred pot 61 liquidometer is set, the highest liquid level scope in the default transition stirred pot 61 of liquidometer.
Liquid level feeds back to the variable-frequence governor 611 that links to each other with transition stirred pot 61 in real time in the measured transition stirred pot 61 of liquidometer, pump liquid measure by 611 pairs of pumps of variable-frequence governor is regulated, when liquid level in the measured transition stirred pot 61 of liquidometer surpasses preset value, then accelerate the running of pump by variable-frequence governor 611, pump more liquid, in case liquid overflows; To record liquid level lower when liquidometer, then feeds back signal to variable-frequence governor 611, reduces the carrying capacity of pump by variable-frequence governor 611, reduces artificial use thereby make production to realize semi-automation.
Enter after material pumps from transition stirred pot 61 and join slurry stirred pot 62, join slurry and whipping appts also is set in the stirred pot 62.Enter the water yield of joining in the slurry stirred pot 62 by increasing or reducing, further regulate the solid content of material, so that the material solid content can satisfy the processing requirements of super grinder 9.By respective reservoirs is set, make production can realize serialization production, avoid manually adding the time loss of water at every turn, enhance productivity.
Material enters the deironing system 7 from joining slurry stirred pot 62, in order to remove impurity such as iron wherein, to improve the whiteness of kaolin product.Further, the used deironing of the present invention system is that the series connection of three magnetic separator de-ironings is used, and by three magnetic separator de-ironings of connecting, can more thoroughly remove the ferrous contaminants in the material, thereby makes that final to obtain the product whiteness more excellent.In this process, the densitometer 71 of deironing system 7 can be real-time the feedback concentration signal to motor-driven control valve 52, default material concentration scope in the motor-driven control valve 52, when crossing through the material concentration of densitometer 71 when low, then densitometer 71 sends signal to motor-driven control valve 52, enter the water of joining in the slurry stirred pot 62 by this valve minimizing, to improve material concentration; When measured concentration signal is material concentration when too high, then increase flooding quantity by this valve, thereby with the solid content control of material 48～52%, for entering super grinder, material gets ready, can reduce Artificial Control by this system, realize the partial automation operation, and improved production efficiency.
The material that 7 deironing are handled through the deironing system enters extra-fine grinding surge tank 8 and stores for future use, and enters super grinder 9 afterwards and further grinds, and obtains kaolin powder finished product through super-dry, depolymerization, calcining, depolymerization more afterwards.
Please refer to Fig. 3, the difference of the production system among this embodiment and first embodiment is: the transition stirred pot 61 of production system in the present embodiment, join between slurry stirred pot 62 and 7 threes of deironing system and need not to arrange variable-frequence governor 611, and directly utilizing pump pumping material, the densitometer that links to each other with deironing system 7 also can not need arrange.Transition stirred pot 61, join slurry stirred pot 62 and need not to arrange motor-driven control valve 52 with water receiver 5.When not using setter, can be by the concentration of manual detection slurry and the add-on of water, the system that adopts present embodiment to provide produces kaolin still can realize purpose of the present invention.
Please refer to Fig. 4, the difference of the production system among this embodiment and first embodiment is: the production system of present embodiment need not to arrange magnetic flow meter 51, motor-driven control valve 52, variable-frequence governor 611, weighing belt 211, volume pump 31, densitometer 71.When system produced kaolin in adopting this embodiment, the metering of each material can be by manually finishing, and system can realize the object of the invention in the employing present embodiment.
Please refer to Fig. 5, the difference of the production system among this embodiment and first embodiment is: the production system of present embodiment need not to arrange electric magnetic flow meter 51, motor-driven control valve 52, variable-frequence governor 611, weighing belt 211, volume pump 31, densitometer 71 and transition stirred pot 61.Material after process ball mill by wet process 3 is handled directly enters in the deironing system 7 to be handled.In this manner, can after finishing kaolinic production, carry out further stir process to kaolin.The metering of material everywhere can be by Artificial Control in the native system, and system can realize the object of the invention in the employing present embodiment.
The difference of the production system among this embodiment and first embodiment is: the kaolin raw ore is after crusher 1 fragmentation in the present embodiment, and median size is less than 50mm.Used wet method grinding machine is the wet method rod mill.
Method embodiment
The system that provides among aforementioned each embodiment is provided, in producing the kaolin process, add water in the ball mill by wet process, disperse dosage, the ball milling time factor is influential to final production energy consumption and output, so it is bright to implement illustration with method, among the following method embodiment, system for use in carrying can be for arbitrary among the aforementioned system embodiment.
Used jaw crusher is PE 250 * 750 types in following examples, and used hammer mill is PC800 * 600 types, below used dispersion agent be Sodium hexametaphosphate 99, ball mill by wet process is the ball mill by wet process for the treatment of pottery.
Below among each embodiment, used super grinder is that CYM5000 type, used strong air-stream spraying drier are that PWG-5 type, used depolymerizer are the JJ-110 type.
Embodiment 1:
Break process: utilize jaw crusher with 40 tons of kaolin crushing raw ores to＜25mm particle, enter hammer mill then and further be crushed to＜5mm;
Wet ball grinding: kaolin clay feed amount and water are to enter ball mill by wet process at 1.5: 1 by weight, add dispersion agent simultaneously, add dispersion agent amount be 1.5 ‰ of kaolin clay feed amount.Grind discharging after 40 minutes, it is 60% to enter the transition stirred pot that material contains admittedly;
Join slurry: to add water to that material contains admittedly in the stirred pot be 50% joining slurry, and add 1.5 ‰ dispersion agent of kaolin clay feed amount, is pumped to then to carry out deironing in three grades of magnetic separator de-ironings and handle;
Extra-fine grinding: give birth to slurry under the effect of pump, evenly enter in the shredder continuously from the pastry mouth of extra-fine grinding machine drum body bottom, shredder master motor drags main shaft and abrasive disk by speed reduction unit, shaft coupling, grinding medium in the machine and living slurry are mixed fully, grind, impact, shear, make material particles constantly levigate, under the effect of slurry pump pressure and abrasive disk, material is constantly motion from the bottom up, makes improved grinding abundant simultaneously.Grind the back material and overflow from the grout outlet on cylindrical shell top, after bolting, enter to be checked jar, through the check material particular diameter less than the amount of 2 μ m greater than the material total amount 90% after, material pumps into the finished product materials storage tank;
Dry workshop section: the kaolin suspension liquid of finished product slurry jar is pumped into dry transition jar, pumped in the strong air-stream spraying drier by the feed worm pump again, the kaolin suspension liquid mixes with pressurized air in the drying tower nozzle, the drying shower nozzle is vaporific upwards ejection, contact with 550～700 ℃ of warm airs that move from bottom to top from hotblast stove and kiln tail from the vaporific material of shower nozzle ejection, vaporific material is sharply heated in warm air and is dry, dried material enters rotoclone collector and the cloth bag collector of kaolin collection device with hot gas, the kaolin material of collecting through collector (water content of the material after the processing is less than 1%) is discharged into the kaolin storage bunker again, supplies with subsequent processing and uses;
Depolymerization, calcining, depolymerization again: dry back material feeds the cylinder of rotary kiln calcining by the defeated machine of charging spiral shell again after depolymerizer is broken up, calcining is broken up by depolymerizer, obtains finished product.
In embodiment 1 production process, 9 tons of wet ball grinding hourly outputs, ton product power consumption 60 degree, extra-fine grinding ton product power consumption 95 degree, Dust Capacity reduces behind the wet ball grinding, gained kaolin finished product grain size 6000 orders, whiteness is greater than 93%.
Embodiment 2:
Break process: utilize jaw crusher with 40 tons of kaolin crushing raw ores to＜25mm particle, enter hammer mill then and further be crushed to＜5mm;
Wet ball grinding: kaolin clay feed amount and water are to enter ball mill by wet process at 1.9: 1 by weight, add dispersion agent simultaneously, add dispersion agent amount be 2 ‰ of kaolin clay feed amount.Grind discharging after 40 minutes, it is 65% to enter the transition stirred pot that material contains admittedly;
Join slurry: to add water to that material contains admittedly in the stirred pot be 48% joining slurry, and add 2 ‰ dispersion agent of kaolin clay feed amount, is pumped to then to carry out deironing in three grades of magnetic separator de-ironings and handle;
Extra-fine grinding: give birth to slurry in the surge tank after extra-fine grinding, overflow from the grout outlet on cylindrical shell top, behind vibratory screening apparatus, enter to be checked jar, extra-fine grinding step among material movement process and discharging standard such as the embodiment 1;
Dry workshop section: utilize strong air-stream spraying drier that the kaolin material is handled, the temperature in of drying machine is 650 ℃, and temperature out is controlled to be 130 ℃, and the water content of the kaolin material after the processing is less than 1%;
Depolymerization, calcining, depolymerization again: material is broken up to place in the rotary kiln after recovering original particle diameter through depolymerizer again and is calcined, and inlet temperature is 1150 ℃ of calcinings 1.5 hours in the kiln, by air cooling system cooling finished product deliver to storage bin again the depolymerization packing product.
Gained kaolin finished product grain size 6000 orders, whiteness is greater than 93%; Power consumption: 10 tons of wet ball grinding hourly outputs, ton product power consumption 55 degree, extra-fine grinding power consumption 94 degree.
Embodiment 3:
Break process: utilize jaw crusher with 40 tons of kaolin crushing raw ores to＜25mm particle, enter hammer mill then and further be crushed to＜5mm;
Wet ball grinding: kaolin clay feed amount and water are to enter ball mill by wet process at 2.3: 1 by weight, add dispersion agent simultaneously, add dispersion agent amount be 2.5 ‰ of kaolin clay feed amount.Grind discharging after 40 minutes, it is 70% to enter the transition stirred pot that material contains admittedly;
Join slurry: to add water to that material contains admittedly in the stirred pot be 52% joining slurry, and add 1.5 ‰ dispersion agent of kaolin clay feed amount, is pumped to then to carry out deironing in three grades of magnetic separator de-ironings and handle;
Extra-fine grinding: give birth to slurry in the surge tank after super grinder grinds, overflow from the grout outlet on cylindrical shell top, after bolting, enter to be checked jar, extra-fine grinding step among material movement process and discharging standard such as the embodiment 1;
Dry workshop section: utilize strong air-stream spraying drier that the kaolin material is handled, the temperature in of drying machine is 700 ℃, and temperature out is controlled to be 120 ℃, and the water content of the kaolin material after the processing is less than 1%;
Depolymerization, calcining, depolymerization again: material is broken up to place in the rotary kiln after recovering original particle diameter through depolymerizer again and is calcined, and inlet temperature is 1150 ℃ of calcinings 1.5 hours in the kiln, by air cooling system cooling finished product deliver to storage bin again the depolymerization packing product.
Gained kaolin finished product grain size 6000 orders, whiteness is greater than 92%; Power consumption: 10.5 tons of wet ball grinding hourly outputs, ton product power consumption 50 degree, extra-fine grinding power consumption 92 degree.
Embodiment 4:
Break process: utilize jaw crusher with 40 tons of kaolin crushing raw ores to＜25mm particle, enter hammer mill then and further be crushed to＜5mm;
Wet ball grinding: kaolin clay feed amount and water are to enter ball mill by wet process at 1.3: 1 by weight, add dispersion agent simultaneously, add dispersion agent amount be 1.5 ‰ of kaolin clay feed amount.Grind discharging after 40 minutes, it is 55% to enter the transition stirred pot that material contains admittedly;
Join slurry: to add water to that material contains admittedly in the stirred pot be 48% joining slurry, and add 1.5 ‰ dispersion agent of kaolin clay feed amount, is pumped to then to carry out deironing in three grades of magnetic separator de-ironings and handle;
Extra-fine grinding: give birth to slurry in the surge tank after extra-fine grinding, overflow from the grout outlet on cylindrical shell top, after bolting, enter to be checked jar, the check material particular diameter less than the amount of 2 μ m greater than the material total amount 88% after pump into the finished product materials storage tank, the material movement process is identical with extra-fine grinding step among the embodiment 1;
Dry workshop section: utilize strong air-stream spraying drier that the kaolin material is handled, the temperature in of drying machine is 700 ℃, and temperature out is controlled to be 120 ℃, and the water content of the kaolin material after the processing is less than 1%;
Depolymerization, calcining, depolymerization again: material places in the rotary kiln after depolymerizer is broken up the original particle diameter of recovery again and calcines, and inlet temperature is 1150 ℃ of calcinings 1.8 hours in the kiln, delivers to storage bin by air cooling system cooling finished product.
Gained kaolin finished product grain size 5000 orders, whiteness is greater than 92%; Power consumption: 8.5 tons of wet ball grinding hourly outputs, ton product power consumption 65 degree, extra-fine grinding power consumption 90 degree.
Comparative Examples
By aforementioned processing condition, only ball mill by wet process is replaced with dry method ball mill (φ 2.2 * 7.5m ball mill, hourly output 5t), after grinding obtains product, in whole process of production, dry ball milling ton product power consumption 110 degree, extra-fine grinding power consumption 100 degree, dispersant dosage is 6 ‰ gained kaolin particle diameters, 5000 orders, and whiteness is greater than 91%.
The used power consumption of the measured production of aforementioned each embodiment and the used power consumption phase specific energy of measured Comparative Examples are under the same conditions saved nearly half power consumption.
6000 order whiteness of gained of the present invention are greater than 92%, and product cut size index＜2 μ m reach more than 90%.Coating, papermaking and rubber and plastic field can be widely used in, part instead of titanium white powder can be realized.
Should be appreciated that those skilled in the art can be under the situation that does not deviate from scope and spirit of the present invention, embodiment is changed or revises, these changes or revise still within protection domain of the present invention.And the disclosure content of the publication that the application draws also all is incorporated herein with reform, with as a reference.
Claims (10)
1. ultrafine kaolin production system, described system comprises crusher and super grinder, crusher is connected successively with super grinder in the described system, it is characterized in that, described system also comprises the wet method grinding machine, the kaolin that enters described wet method grinding machine is to the kaolin of particle diameter less than 50mm through described crusher in crushing, the kaolin of described wet method grinding machine output enters described super grinder, and particle diameter accounts for 95～99% of the kaolin cumulative volume that grinds less than 325 purpose kaolin in the kaolin of described wet method grinding machine output.
2. ultrafine kaolin production system according to claim 1 is characterized in that, enters the described kaolin particle diameter of described wet method grinding machine less than 5mm.
3. ultrafine kaolin production system according to claim 1 is characterized in that, described wet method grinding machine is any in ball mill by wet process, wet method rod mill, wet method tuber grinder, the wet method sand mill.
4. ultrafine kaolin production system according to claim 3 is characterized in that, used grinding medium is middle aluminium Ceramic Balls in the described ball mill by wet process; In described in the aluminium Ceramic Balls diameter be during the middle aluminium Ceramic Balls of 30～50mm accounts for aluminium Ceramic Balls total amount 65～70%; Diameter be the middle aluminium Ceramic Balls of 50～70mm account for described in aluminium Ceramic Balls total amount 25～30%; Diameter be the middle aluminium Ceramic Balls of 70～100mm account for described in aluminium Ceramic Balls total amount 2～5%.
5. ultrafine kaolin production system according to claim 4, it is characterized in that, fixed interval connects a plurality of bin isolation boards in the cavity of described ball mill by wet process, and described bin isolation board and described ball mill by wet process inwall surround a plurality of chambers, and described middle aluminium Ceramic Balls places described chamber; A plurality of through holes that are of a size of 2 ~ 12mm are set on the described bin isolation board.
6. according to the described ultrafine kaolin production system of claim 5, it is characterized in that described crusher is jaw crusher or hammer mill.
7. according to the described ultrafine kaolin production system of claim 6, it is characterized in that described crusher comprises jaw crusher and the hammer mill of series connection.
8. a right to use requires the method that each described system produces ultrafine kaolin in 1 ~ 7, it is characterized in that,
The kaolin raw ore after fragmentation particle diameter less than 50mm;
Be that 1 ~ 3:1 mixes by weight by kaolin and water, add dispersant again and grind by ball mill by wet process, when particle diameter in the kaolin that ball mill by wet process grinds account for less than 325 purpose kaolin the kaolin cumulative volume that grinds 95 ~ 99% after discharging;
Add water in the above-mentioned gained feed liquid again with dispersion agent after join slurry, join slurry solid content be 48 ~ 52%;
The gained feed liquid is through deironing processing, extra-fine grinding, drying, depolymerization, calcining, depolymerization obtains kaolin powder finished product again in the previous step.
9. method according to claim 8 is characterized in that, described kaolin raw ore after fragmentation particle diameter less than 5mm.
10. according to Claim 8 or 9 described methods, it is characterized in that, the add-on of described dispersion agent by processing kaolin weight 1 ~ 4 ‰.
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| WO2016077339A1 (en) * | 2014-11-10 | 2016-05-19 | Imerys Oilfield Minerals, Inc. | Method for preparing bauxite and/or kaolin for use in ceramic proppants |
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| CN103664195B (en) * | 2013-12-05 | 2015-06-17 | 广东萨米特陶瓷有限公司 | Standardized continuous treatment method of ceramic raw material and production line thereof |
| CN106182407A (en) * | 2015-05-07 | 2016-12-07 | 广东科达洁能股份有限公司 | A kind of ceramic mud classification combines new technology and the equipment thereof of preparation |
| CN107942905A (en) * | 2017-11-27 | 2018-04-20 | 龙岩高岭土股份有限公司 | A kind of method for improving kaolin concentrate quality stability |
| CN109107770A (en) * | 2018-08-15 | 2019-01-01 | 浙江天磨矿业科技有限公司 | A kind of regrinding and reconcentration method recycling fluorite from tailing |
| CN109569845B (en) * | 2018-11-30 | 2021-08-17 | 内蒙古超牌新材料股份有限公司 | Superfine kaolin four-stage powder preparation equipment, superfine kaolin and four-stage powder preparation production process thereof |
| CN113604076A (en) * | 2020-06-06 | 2021-11-05 | 山西中埃科技有限公司 | Preparation method of nano kaolin for rubber filler |
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