CN107159443B - A kind of quiet levigation method of powder - Google Patents
A kind of quiet levigation method of powder Download PDFInfo
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- CN107159443B CN107159443B CN201710506172.XA CN201710506172A CN107159443B CN 107159443 B CN107159443 B CN 107159443B CN 201710506172 A CN201710506172 A CN 201710506172A CN 107159443 B CN107159443 B CN 107159443B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000000843 powder Substances 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910001868 water Inorganic materials 0.000 claims abstract description 60
- 239000002002 slurry Substances 0.000 claims abstract description 49
- 238000003756 stirring Methods 0.000 claims abstract description 41
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 29
- 238000000746 purification Methods 0.000 claims abstract description 18
- 229910052742 iron Inorganic materials 0.000 claims abstract description 16
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 239000004576 sand Substances 0.000 claims abstract description 7
- 229910052580 B4C Inorganic materials 0.000 claims abstract description 5
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 26
- 239000000047 product Substances 0.000 claims description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 229910052799 carbon Inorganic materials 0.000 claims description 19
- 238000005192 partition Methods 0.000 claims description 19
- 239000002245 particle Substances 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 15
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 7
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 6
- 235000011613 Pinus brutia Nutrition 0.000 claims description 6
- 241000018646 Pinus brutia Species 0.000 claims description 6
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 6
- 239000002351 wastewater Substances 0.000 claims description 6
- 239000003153 chemical reaction reagent Substances 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 230000001376 precipitating effect Effects 0.000 claims description 4
- 238000009690 centrifugal atomisation Methods 0.000 claims description 3
- 238000005119 centrifugation Methods 0.000 claims description 3
- 239000003595 mist Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- 239000004115 Sodium Silicate Substances 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- 206010016766 flatulence Diseases 0.000 claims description 2
- 239000003350 kerosene Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- NICDRCVJGXLKSF-UHFFFAOYSA-N nitric acid;trihydrochloride Chemical group Cl.Cl.Cl.O[N+]([O-])=O NICDRCVJGXLKSF-UHFFFAOYSA-N 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 238000004064 recycling Methods 0.000 claims description 2
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 208000002925 dental caries Diseases 0.000 claims 1
- 235000012149 noodles Nutrition 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000000227 grinding Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 239000002994 raw material Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000011282 treatment Methods 0.000 description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical class [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- 206010054949 Metaplasia Diseases 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- 229910003978 SiClx Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000013066 combination product Substances 0.000 description 1
- 229940127555 combination product Drugs 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000015689 metaplastic ossification Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 230000007115 recruitment Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000011863 silicon-based powder Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000001694 spray drying Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- 230000008646 thermal stress Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of methods of the quiet levigation of powder, by silicon carbide, silicon nitride, boron carbide and water are added in horizontal sand mill according to certain mass ratio to be ground, it is 35:65 that ground slurry, which is input to the mass ratio of slurry and water in purifying tank, decarbonizer-iron removing reagent-purification liquid-is added to be stirred one hour, stop stirring, impurity on the water surface is collected into returnable, continue stirring removal impurity, there is no floating material to pulp noodle, slurry must be purified, slurry after purification is input in quiet levigation tank according to certain mass than water is added, after natural subsidence, sample detection, after detection is qualified, it is taken out and is expected with segmented discharge nozzle, it is input in corresponding finished container.Product of the present invention quality is stablized, and produces pollution-free.
Description
Technical field
The present invention relates to a kind of solid powder stage division, the method for specifically a kind of quiet levigation of powder.
Background technique
Silicon carbide (molecular formula sic) is institute's shape using quartz sand and high-quality petroleum coke charcoal under electric furnace high temperature action
At a kind of combination product, be widely used in the various fields such as industrial grinding tool, refractory material, smelting iron and steel, military project space flight.Carbon
SiClx agglomeration preparation process is as follows: phenolic resin class raw material and silicon powder being prepared into powder precursor using mixed technique is wrapped, then
It is carbonized and is calcined, prepare that good sphericity, particle diameter distribution are narrow and uniform submicron silicon carbide powder, average grain diameter are about
0.1μm.The generating process of submicron silicon carbide powder is that silicon-phenolic resin nucleocapsid powder precursor passes through 800 DEG C of carbonization treatments
Generate silico-carbo nucleocapsid powder；It is sintered at 1500 DEG C, liquid-state silicon is reacted with carbon shell internal layer generates silicon carbide layer；In thermal stress and liquid
Silicon carbide shell is broken under the impact of state silicon, and the submicron silicon carbide particle of formation enters in liquid-state silicon, is generated by silicon carbide, is broken
Broken continuous circulation, new silicon carbide layer are constantly promoted to carbon-coating until generating submicron silicon carbide spherical powder completely.
Conventional silicon carbide is micro-powder graded to be classified using single-stage gas flow sizing machine, and effectiveness of classification is low, reunion easy to form,
The defects of some bulky grains can't resolve, and fine powder recovery rate is low, product grading distribution is wide, while production environment is bad, is formed and is handed over
The pollution of fork pollution and air impact, such as tens microns of particle can float 50 to 100 meters far in static air.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of method of the quiet levigation of powder, product of the present invention matter
Amount is stablized, and produces pollution-free.
In order to solve the above-mentioned technical problem, the invention adopts the following technical scheme:
1, a kind of quiet levigation method of powder, it is characterised in that follow the steps below:
1, slurry is prepared: by silicon carbide, silicon nitride, boron carbide, water and dispersing agent according to mass ratio 10~20:10~20:
10~20:30~50:0.1~0.5, which is added in horizontal sand mill, is ground to particle diameter less than 1 micron, obtains slurry；
2, preparation removes carbon slurry: slurry is input in purifying tank and is added water, the mass ratio of slurry and water is 35:65,
1~5% decarbonizer for accounting for the gross mass of slurry and water is added, the stirring of stopping in 20 minutes is stirred afterwards, with the pressure of 0.3~0.6MPa
Contracting tympanites is dynamic, by slurry carbon and lighter impurity pulled out with dedicated fishing carbon device, continuation stirring slurry 20 minutes, stopping
Stirring, is agitated with the compressed gas of 0.3~0.6MPa, to impurity emersion, is pulled out with dedicated fishing carbon device, this operation is repeated, until nothing
Until impurity emersion, obtain except carbon slurry；
3 preparations are starched except iron charge: having removed carbon stirring three ten minutes later, 10~20% that the gross mass for accounting for slurry and water is added are removed
Chalybeate stirs the stirring of stopping in one hour and waste water is discharged, is input in secondary returning closed cans, to secondary recovery after reaction eight hours
3%~5% former iron removing reagent for accounting for waste water gross mass is added in waste water in tank, in case recycling；Then it is added and accounts for purifying tank appearance
The water cleaning stirring of product 65 percent, stirring three stop stirring ten minutes later, water are discharged after to be precipitated and accounts for the total water of system
The 40%~60% of amount continues stirring 30 minutes, stops stirring, remaining water is all discharged after precipitating, cleaning twice to get
Except iron charge is starched；
4 to except iron charge slurry in be added water and purification liquid, except iron charge slurry, water and purify liquid mass ratio be 20~35:50~
75:5~15 after stirring at normal temperature is reacted eight hours, are heated to 75~100 DEG C of cleanings, and stirring two stops stirring, precipitating ten minutes later
Water is discharged in returnable afterwards, adds the water for accounting for purification tank volume 60~75%, cleaning stirring two is discharged ten minutes later, according to
It is secondary to clean at least 2 times to get purification slurry is arrived；
5), purification slurry is input in quiet levigation tank 2, and is added water at distance classification tank 30cm suitable for reading, purification
The mass ratio of slurry and water is 20~30:70~80, and slurry is layered after natural subsidence 12 hours, detection layering slurry, after qualified,
It will test the qualified bed of material with segmented discharge nozzle, be input in corresponding finished container, added water into quiet levigation tank
At distance classification tank 30cm suitable for reading, natural subsidence 10 hours, the corresponding bed of material of sample detection, after qualified, with segmented discharge nozzle
It will test the qualified bed of material to be input in corresponding finished container, repeat above step, until the grain size number needed has been collected,
Corase particles in quiet levigation tank are returned in horizontal sand mill；
6) feed pipe that good varigrained finished product feed liquid passes through inclined plate settler respectively, will be classified to enter equalization chamber and divide
Cloth device makes feed liquid rapid subsidence by the angle of inclined plate, and the concentration of drying machine with centrifugal spray needs is respectively prepared, is input to inclined plate
It is stirred evenly in the collecting tank of settler and by the blender above collecting tank；
7), air is filtered and is heated equal in the shape of a spiral into the air distributor hot-air at the top of drying machine with centrifugal spray
Even enters hothouse；The finished product feed liquid for meeting the concentration of concentration requirement is input to after the filtering of slurries filtration device through material pump conveying
In high speed centrifugal atomization device at the top of to drying machine with centrifugal spray, superfine misty liquid pearl is formed in hothouse, simultaneously with hot-air
Stream contact is dried in a short time, and the finished product material after drying is continuously exported by drying machine with centrifugal spray bottom；Centrifugal spray dryer
Dry machine air outlet connects whirlwind cyclone separator, and the isolated finished product material of cyclone separator is continuously by cyclone separator bottom
Output；The tail gas of cyclone separator empties after deduster；
8, drying machine with centrifugal spray bottom is exported into finished product material, the finished product material of cyclone separator bottom output inputs essence simultaneously
The feed inlet of close packing machine carries out sieve pine with ultrasonic wave sieve, automatic packaging machine weighing packing is entered after the completion of sieve pine；
The dispersing agent is sodium metasilicate；The decarbonizer is the composition of No. two oil and kerosene according to mass ratio 5:1；Institute
Stating iron removing reagent is chloroazotic acid；The purification liquid is 10~20% piece aqueous alkali.
Further, the water is pure water.
Further, the sampler is long 1.5m, and diameter is 2cm and with graduated plastic, transparent pipe.
Further, the concentration for purifying slurry in step 4 described in finished container is 60%.
Further, the quiet levigation tank 2 includes tank body 21, and the tank body 21 successively includes the first circle from top to bottom
Platform section 211, the first conical section 213 connected with the first rotary table section 211, second connected with first conical section 213
Rotary table section 212, the second conical section 214 connected with the second rotary table section 212, the connected with second conical section 214
Three rotary table sections 215；Opening is set above the first rotary table section 211,215 lower end of third rotary table section connects outlet valve 22,
The third rotary table section 215 is also connected to water inlet pipe 23, and inlet valve 24 is arranged on the water inlet pipe 23；The first rotary table section 211
Feed pipe 25 is set in upper opening, inlet valve 26 is set on the feed pipe 25；First conical section 213 and described second
Rotary table section is separated by first partition 216, and the second rotary table section is divided with second conical section 214 by second partition 217
It opens；Fixed first spreader 27 in 216 center of first partition, fixed second spreader 28 in 217 center of second partition, institute
The first spreader 27 is stated across the first partition 216 and by cavity relative to the first partition 216 up and down, described the
Two spreaders 28 pass through the second partition 217 and by cavity relative to the second partition 217 up and down.
Further, the height that first spreader 27 is located at 216 top of first partition is greater than it in lower section
Highly；The height that second spreader 28 is located at 217 top of second partition is less than it in the height of lower section.
Invention has following advantageous effects:
1, the advantage of this technique is that horizontal sand mill can preferably control effective particle and occur, effective particle yield
Height, and purified by purifying tank, by floated classification, desired drying humidity is obtained by inclined plate sedimentation after the completion of classification,
By drying machine with centrifugal spray drying and packaging, the features such as whole flow process recruitment is few, pollution-free, high-efficient.Compared to existing technique
Equipment is old, bulky grain control is bad, most of baking oven formula drying.Low efficiency, it is at high cost, be easy pollution etc., be not suitable with existing
It is produced for metaplasia.
2, the spreader in purifying tank of the present invention can preferably disperse effective particle.
3, the pulp density that baking needed is wanted is made by inclined plate settler in the gone out finished product of quiet levigation, dries to be efficient
Dry efficiency establishes good ground foundation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the quiet levigation tank of the present invention.
Fig. 2 is the partial sectional view of Fig. 1.
Specific embodiment
Silicon nitride, silicon carbide, boron carbide raw material are stirred in the ratio of 1:1, will be passed through after being stirred using material pump
40% to 60% pure water and 0.1% to 0.5% dispersant is added in solid-liquid boron carbide after the pre-dispersed wettability treatment of blender
In material input, 1 millimeter or so of ball made of the abrasive media silicon carbide in material and cylinder is high-speed rotating together
Disperser agitation makes solia particle and abrasive media in material generate stronger collision, friction, shearing work each other
With having the function that accelerate levigate particle and disperse agglomerations.Material after grinding distribution is by dynamic separator separation grinding
Then medium is flowed out from discharge nozzle.
Abrasive media carries out strong energy exchange in material between disperser, grinds to reach to the hyperfine of material
Mill；Reach effective particle between 100 nanometers to 1 micron to maximize.Advanced big flow separates sieve structure, guarantees efficiently production,
It does not block；Spiral water circulation channel, the setting of multiple location cooling water.Feed pressure, drop temperature, machine envelope lubrication mailbox liquid
The multiple locations security controls such as position.
The slurry that sand mill flows out is input in purifying tank, addition decarbonizer is stirred evenly, stirs 30 minutes and stops
Carbon is pulled out after slurry is separated with carbon, continues to stir the stirring of stopping in 30 minutes, fishes out carbon after slurry and carbon separation by stirring
Out, this operation is recycled, until not having carbon emersion, iron removing reagent 10% or so is added, stirs the stirring of stopping in one hour, reaction 6-8 is small
When, the waste liquid reflected is input in recovery pond, adds water 65% to continue stirring 30 minutes, is input to back water after to be precipitated
Purification liquid 10% or so is added in receives pond, after washing twice, stirs 30 minutes, stops stirring, opens 90 degree of left sides of heating devices heat
The right side two stops heating ten minutes later, reacts 8-10 hours, the liquid after purification is input in recovery pond, and then plus water 65% carries out
Cleaning, is washed 3-4 times, very pure material will be made.Into the quiet levigation of next procedure.
Automatic heating device can preferably control reaction temperature, and the purity of slurry reaches 99,999%.Liquid in recovery pond returns
It receives and recycles, discharge is neutralized after utilization 2 to 3 times, be discharged to comprehensive settling tank, pH value is neutralized by level Four filtering ponds connection, filtering
Into a last pond, then with after the processing of plate filter press, continued to use by high technology ceramics filtering water process, by ceramics
Less than 0.1 micron water containing solid particle after filter process exhausts, the water of discharge be it is neutral, without what pollute, uniquely
Exactly there is fine powder inside draining, after we use the processing of plate filter press, subdivision is collected, water discharges, and is lacked electricity consumption with water and is waited symbol less
Close the energy-saving requirement that country calls.
The material purified will be input in quiet levigation tank with dnockout pumps, in the ratio 30:70's of slurry and pure water
Concentration is added at levigation tank 30CM suitable for reading, is added quantitative dispersing agent from bottom by among tank when adding pure water
Spreader is uniformly dispersed in slurry in pure water, and natural subsidence 12 hours, with Special sample taker sample detection, after detection is qualified
It is taken out and is expected with segmented discharge nozzle, is input in corresponding product collector, this is 100 nanometers to 500 nanometers and obtains number section.Continue to fill
Water after being added to specified position, settles 10 hours, sample detection, with segmented discharge nozzle takes out material after qualified, be input to it is corresponding at
In product collector, this is 500 nanometers to 1 micron of number section, continues to wash by water, and has been divided until the number section of effective particle.
The finished product feed liquid being classified passes through the feed pipe of inclined plate settler, equalization chamber and distributor is introduced into, by oblique
The angle of plate settles feed liquid quickly, and the concentration of drying machine with centrifugal spray needs is made.It is input to the collection of inclined plate settler
In tank, it is input to the feed inlet of drying machine with centrifugal spray after mixing evenly by the blender above collecting tank.
Inclined plate settler accelerates sinking speed using the angle of inclined plate mainly according to porous feed.Inclined plate settler contracting
The short settling height of drop, increases coalescence area, improves treating capacity and separative efficiency.Increase the mutual of plate and drop
Effect reduces disturbance of the liquid to drop, is conducive to the sedimentation of feed liquid.
Air is filtered and is heated into the air distributor at the top of drying machine, and hot-air uniformly enters dry in the shape of a spiral
Pulp density in inclined plate sedimentation collecting tank is adjusted to proper states by dry room, is stirred evenly and is transported to centrifugation spray with dnockout pumps
In high speed centrifugal atomization device at the top of mist drying machine, spraying poling fine mist liquid pearl, in a short time with hot-air parallel flow contact
Drying, drying finished product continuously by exporting in dry motor spindle and cyclone separator, are packed into accurate packing machine.Drying is fast,
Easy to knot groups, collection rate be not high.
Finished product material inside the drying tower and cyclone collector of centrifugation drying is inputted to the feed inlet of accurate packing machine simultaneously,
Sieve pine is carried out with ultrasonic wave sieve, automatic packaging machine is entered after the completion of sieve pine, whole flow process not will form pollution, totally enclosed type packaging
It is not in dust, weighing is accurate, and error is less than 0.002 gram.
Claims (6)
1. a kind of quiet levigation method of powder, it is characterised in that follow the steps below:
1) slurry, is prepared: by silicon carbide, silicon nitride, boron carbide, water and dispersing agent according to 10~20:10 of mass ratio~20:10
~20:30~50:0.1~0.5, which is added in horizontal sand mill, is ground to particle diameter less than 1 micron, obtains slurry；
2), preparation removes carbon slurry: being input in purifying tank and be added water for slurry, the mass ratio of slurry and water is 35:65, is added
1~5% decarbonizer of the gross mass of slurry and water is accounted for, stirs the stirring of stopping in 20 minutes afterwards, with the compression tympanites of 0.3~0.6MPa
It is dynamic, by slurry carbon and lighter impurity pulled out with dedicated fishing carbon device, continue stirring slurry 20 minutes, stop stirring, use
The compressed gas of 0.3~0.6MPa is agitated, and to impurity emersion, is pulled out with dedicated fishing carbon device, this operation is repeated, until free from admixture emersion
Until, it obtains except carbon slurry；
3) preparation is except iron charge slurry: after having removed carbon stirring 30 minutes, 10~20% iron removing reagents for accounting for the gross mass of slurry and water are added,
The stirring of stopping in 1 hour is stirred waste water is discharged, is input in secondary returning closed cans, into secondary returning closed cans after reaction 8 hours
3%~5% iron removing reagent for accounting for waste water gross mass is added in waste water, in case recycling；Then the water for accounting for purification tank volume 65% is added
Cleaning stirring, stirring 30 minutes after stop stirring, water is discharged after to be precipitated, the water of discharge account for system total Water 40%~
60%, continue stirring 30 minutes, stops stirring, remaining water is all discharged after precipitating, cleaning is starched twice to get except iron charge；
4) addition water and purification liquid in except iron charge slurry, except iron charge slurry, water and purify the mass ratio of liquid as 20~35:50~75:5
~15, after stirring at normal temperature is reacted 8 hours, 75~100 DEG C of cleanings are heated to, stirring stops stirring after twenty minutes, by water after precipitating
Be discharged in returnable, add account for purification tank volume 60~75% water, cleaning stirring be discharged after twenty minutes, successively clean to
Lack 2 times to get purification slurry is arrived；
5), purification slurry is input in quiet levigation tank (2), and is added water at distance classification tank 30cm suitable for reading, purification material
The mass ratio of slurry and water is 20~30:70~80, and slurry is layered after natural subsidence 12 hours, and detection layering slurry after qualified, is used
Segmented discharge nozzle will test the qualified bed of material, be input in corresponding finished container, added water into quiet levigation tank away from
At classification tank 30cm suitable for reading, natural subsidence 10 hours, the corresponding bed of material of sample detection will with segmented discharge nozzle after qualified
The qualified bed of material of detection is input in corresponding finished container, repeats above step, until the grain size number needed has been collected, it will
Corase particles in quiet levigation tank return in horizontal sand mill；
6) feed pipe that good varigrained finished product feed liquid passes through inclined plate settler respectively, will be classified and enter equalization chamber and distribution
Device makes feed liquid rapid subsidence by the angle of inclined plate, and the concentration of drying machine with centrifugal spray needs is respectively prepared, and it is heavy to be input to inclined plate
It drops in the collecting tank of device and is stirred evenly by the blender above collecting tank；
7), air is filtered and is heated into the air distributor at the top of drying machine with centrifugal spray, and hot-air is uniform in the shape of a spiral
Enter hothouse；The finished product feed liquid for meeting concentration requirement is input to after the filtering of slurries filtration device by expecting that pump is transported to centrifugation spray
In high speed centrifugal atomization device at the top of mist drying machine, superfine misty liquid pearl is formed in hothouse, is existed with hot-air parallel flow contact
Drying, the finished product material after drying are continuously exported by drying machine with centrifugal spray bottom in short time；Drying machine with centrifugal spray outlet air
Mouth connection whirlwind cyclone separator, the isolated finished product material of cyclone separator are continuously exported by cyclone separator bottom；Rotation
The tail gas of wind separator empties after deduster；
8) drying machine with centrifugal spray bottom, is exported into finished product material, the finished product material of cyclone separator bottom output inputs precision simultaneously
The feed inlet of packing machine carries out sieve pine with ultrasonic wave sieve, automatic packaging machine weighing packing is entered after the completion of sieve pine；
The dispersing agent is sodium metasilicate；The decarbonizer is the composition of No. two oil and kerosene according to mass ratio 5:1；It is described to remove iron
Agent is chloroazotic acid；The purification liquid is 10~20% piece aqueous alkali.
2. a kind of quiet levigation method of powder as described in claim 1, it is characterised in that: the water is pure water.
3. a kind of quiet levigation method of powder as described in claim 1, it is characterised in that: the corresponding bed of material of sample detection makes
With sampler, sampler is long 1.5m, and diameter is 2cm and with graduated plastic, transparent pipe.
4. a kind of quiet levigation method of powder as described in claim 1, it is characterised in that: institute in finished container in step 4)
The concentration for stating purification slurry is 60%.
5. a kind of quiet levigation method of powder as described in claim 1, it is characterised in that: the quiet levigation tank (2)
Including tank body (21), the tank body (21) includes successively from top to bottom the first rotary table section (211), with the first rotary table section
(211) the first conical section (213) connected, the second rotary table section (212) connected with first conical section (213) are and described
The second conical section (214) that second rotary table section (212) connects, the third rotary table section connected with second conical section (214)
(215)；Setting opening above the first rotary table section (211), the third rotary table section (215) lower end connect outlet valve (22),
The third rotary table section (215) is also connected to water inlet pipe (23), and inlet valve (24) are arranged on the water inlet pipe (23)；First circle
Feed pipe (25) are set in platform section (211) upper opening, inlet valve (26) are set on the feed pipe (25)；First circular cone
Section (213) is separated with the second rotary table section by first partition (216), the second rotary table section and second conical section
(214) it is separated by second partition (217)；Fixed first spreader (27) in first partition (216) center, described second every
Fixed second spreader (28) in plate (217) center, first spreader (27) pass through the first partition (216) and by cavitys
Up and down relative to the first partition (216), second spreader (28) passes through the second partition (217) and by chamber
Body relative to the second partition (217) up and down.
6. a kind of quiet levigation method of powder as claimed in claim 5, it is characterised in that: the first spreader (27) position
Height above the first partition (216) is greater than it in the height of lower section；Second spreader (28) is located at described the
Height above two partitions (217) is less than it in the height of lower section.
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| CN109046741B (en) * | 2018-07-13 | 2020-04-14 | 威海圆环先进陶瓷股份有限公司 | Silicon nitride micro-bead precise size grading device and method based on centrifugal laminar flow method |
| CN109161379B (en) * | 2018-08-13 | 2020-03-31 | 湖南庄耀光电科技有限公司 | Method for treating abrasive |
| CN115139145A (en) * | 2022-09-06 | 2022-10-04 | 江苏宏达数控科技股份有限公司 | Closed digit control machine tool |
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