CN1597281A - Manufacturing method of silicon carbide atomization nozzle in wet method stack gas desulfur device - Google Patents
Manufacturing method of silicon carbide atomization nozzle in wet method stack gas desulfur device Download PDFInfo
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- CN1597281A CN1597281A CN200410035431.8A CN200410035431A CN1597281A CN 1597281 A CN1597281 A CN 1597281A CN 200410035431 A CN200410035431 A CN 200410035431A CN 1597281 A CN1597281 A CN 1597281A
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- 229910010271 silicon carbide Inorganic materials 0.000 title claims abstract description 28
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims description 29
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 title abstract description 20
- 238000000889 atomisation Methods 0.000 title description 3
- 238000001035 drying Methods 0.000 claims abstract description 17
- 238000005245 sintering Methods 0.000 claims abstract description 12
- 239000011505 plaster Substances 0.000 claims description 20
- 239000010440 gypsum Substances 0.000 claims description 16
- 229910052602 gypsum Inorganic materials 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000013461 design Methods 0.000 claims description 10
- 238000007569 slipcasting Methods 0.000 claims description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 8
- 229910052791 calcium Inorganic materials 0.000 claims description 8
- 239000011575 calcium Substances 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 5
- 238000005266 casting Methods 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 206010020843 Hyperthermia Diseases 0.000 claims description 3
- 235000015895 biscuits Nutrition 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005202 decontamination Methods 0.000 claims description 3
- 230000003588 decontaminative effect Effects 0.000 claims description 3
- 230000002950 deficient Effects 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 3
- 230000036031 hyperthermia Effects 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000012216 screening Methods 0.000 claims description 3
- 239000000344 soap Substances 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 239000002002 slurry Substances 0.000 abstract description 12
- 238000009966 trimming Methods 0.000 abstract 1
- 239000011162 core material Substances 0.000 description 20
- 235000019738 Limestone Nutrition 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 7
- 239000006028 limestone Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000002421 anti-septic effect Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000003416 augmentation Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 238000005200 wet scrubbing Methods 0.000 description 1
Landscapes
- Producing Shaped Articles From Materials (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
A process for preparing the atomizing nozzle of silicon carbide used in wet fume-desulfurizing equipment includes such steps as preparing the internal and external bottom die, copying the external productive mould, making mould core, pouring slurry, drying, trimming and sintering.
Description
Technical field
The present invention relates to the manufacture method of carborundum atomizer in a kind of wet flue gas desulfurizer.
Background technology
In lime stone one gypsum wet flue gas desulfurizing technology, the atomizer that sprays lime stone slurry in the fountain absorption tower is the key factor of control wet process of FGD (WFGD) system operation and maintenance cost.The function of atomizer is a large amount of lime stone slurries to be converted into can provide the atomizing of enough contacts area droplet effectively to remove the SO in the flue gas
2The selection of atomizer and design should be considered following Several Factors: the content and the pH value that 1. are present in the factor that causes the nozzle corrosion in limestone slurry and the waste gas, particularly chloride and fluoride; 2. the factor that causes nozzle to be etched comprises the percentage composition of flying dust, the size of limestone particle and the lime stone slurry flow velocity during by nozzle; 3. the performance requirement of nozzle must reach the given mist droplet particle size of system under assigned operation pressure; 4. the susceptibility of nozzle to stopping up, can free unimpeded diameter (nozzle allows the spherical impurity of the maximum gauge that passes through); 5. the material that is used for making nozzle must consider whether nozzle can successfully overcome the mechanical damage that causes because of installation, operation and maintenance etc.In WFGD, the atomization method of liquid generally adopts the pressure atomization method.The pressure type atomizer mainly is made up of liquid tangential inlet, liquid in rotation chamber, nozzle bore etc., utilize high pressure to make liquid obtain very high pressure (2-20Mpa), enter the rotating room of nozzle from tangential inlet, liquid obtains in the rotating room to rotatablely move and by the nozzle bore atomized spray.The nozzle that is generally used for flue gas desulfurization (FGD) wet scrubbing tower and absorption tower has 6 kinds: 1. hollow cone tangent type; 2. solid-cone tangent type; 3. two hollow cone tangent types; 4. solid-cone; 5. screw type; 6. major path screw type.
For atomizer, owing to adopt lime stone slurry as absorbent, thus very strong abrasion is arranged.Therefore, when selecting to be used for the nozzle on absorption tower, its manufactured materials not only has good antiseptic and rustproof performance, wear-resistant ability, and arranged long service life, is suitable for the shape of making various complexity.At present, be applicable to that the material of making this nozzle mainly contains silicon carbide reaction-sintered, silicon nitride combined silicon carbide, cobalt alloy, polyurethane etc.
Carborundum (SiC) is as the typical material in the structural ceramics, at first successfully being adopted the β-SiC of submicron order is raw material in the seventies in last century by U.S. scientist S.Prochazka with a small amount of B, C additive, has successfully made fine and close silicon carbide ceramics by non-pressure sintering technology.From then on.Carborundum sinters pottery into, is made into ceramic component, realizes that industrialization is just possible.Afterwards, the develop by leaps and bounds production of carborundum of countries in the world forms a new industry of ceramic field.Silicon carbide ceramics not only has the good high-temperature characteristic, as high-temperature oxidation resistance, elevated temperature strength height, creep properties is little, heat conductivity good, light specific gravity etc., and have a series of excellent properties such as high rigidity, wear-resistant, acid-alkali-corrosive-resisting, can bear the harsh working environment that metal material and high-molecular organic material are difficult to bear, usually become the key that many emerge science technology are achieved.In recent years, because the development of high-tech, many industrial circles and special procure increase in demand to high-performance silicon carbide add that the high-performance ceramics parts are increasing in numerous introduction equipments, have more impelled the development of high-tech silicon carbide ceramics.
Therefore, select for use silicon carbide material to make atomizer, not only have good antiseptic and rustproof performance, and high rigidity, wear-resistant, high temperature resistant, both made when suffering the extremely strong chemical reagent of serious abrasion, high temperature and corrosivity, the atomizer of this material also can keep above-mentioned advantage.With regard to its service life: be 5000 hours the service time of recrystallized silicon carbide, and be 6000-7000 hour the service time of silicon nitride combined silicon carbide matter, and can reach more than 10000 hours the service time of silicon carbide reaction-sintered matter.
Because the functional requirement of atomizer, therefore, its profile and inner chamber physical dimension complexity, particularly inner chamber claimed structure size is accurate, strict, and inner surface is bright and clean, level and smooth, and higher fineness be arranged, whole member wall unevenness etc. besides, thickness differs.So, for the atomizer of silicon carbide reaction-sintered matter, rely on traditional slip-casting shaping process, just be difficult to create.
Summary of the invention
Technical problem to be solved by this invention provides the manufacture method of silicon carbide reaction-sintered atomizer in a kind of wet flue gas desulfurizer, solves manufacturing process complexity in the prior art, technological deficiency that yield rate is low.
For achieving the above object, described manufacture method bag following steps:
(1) inside and outside bed die is made: with the physical dimension according to the inside and outside bed die of the structural design of atomizer is foundation, adopts machined, artisan craftsmanship adhering method to finish inside and outside bed die and makes;
(2) produce external mold with the molded work of outer bottom: produce external mold and adopt plaster mold, earlier evenly smear an amount of soft soap water on the bed die outside, place outer bed die in the plaster mold external form mould and fix, according to land plaster and 3: 2 weight proportion of water preparation calcium plaster, gypsum with carried out vacuum stirring 1-3 minute after water mixes, after screening out decontamination, then also once fill with in the injection model, again in addition slight vibration to get rid of bubble, and make calcium plaster flow into each edges and corners, calcium plaster solidifies the back to be removed plaster mold external form mould and takes out outer bed die, promptly obtains producing external mold; Gypsum production is molded as outward in the hothouse of back between 40-50 ℃ and dried 4-5 days, and the uniform drying appropriateness can come into operation;
(3) make core: make of interior bed die and produce internal mold, make core by producing internal mold again.According to the internal structure of atomizer, make and the corresponding core of atomizer interior shape;
(4) injection forming: adopt the solid casting method, during grouting operation, fibrous root is being produced position, quantity and the size of determining injected hole on the mould according to the concrete structure of atomizer, then, core is fixed in the production external mold, must keeps both central lines, matched moulds slip casting again; Will rationally grasp injection speed in the slip casting process, and mould is produced in vibration frequently;
(5) drying: after the molding blank demoulding, the low temperature drying chamber is sent in first air dry, and core and base substrate broken away from then, temperature between 30-45 ℃, dry 40-60 hour;
(6) biscuit finishing: after the molding blank drying, the defective on the billet surface is repaired;
(7) sintering: send the hyperthermia drying chamber with the base substrate that trims, between 80-100 ℃ dry 10-12 hour, get final product the shove charge sintering after finishing, vacuumize in the temperature-rise period and be heated to 1400-1700 ℃, through siliconising, constant temperature, inflated with nitrogen is cooled to 1100-1200 ℃, fills the helium fast cooling to coming out of the stove below 120-150 ℃.
Adopt the advantage of technique scheme to be: accurately to finish the manufacturing of the inside and outside version of atomizer complexity, technology is simple, yield rate height, the atomizer of making not only have good antiseptic and rustproof performance, and high rigidity, high temperature resistant, long service life.
The specific embodiment
Atomizer is owing to the internal structure external structure with complexity, and inside and outside shape difference, and the thickness thickness of nozzle wall does not wait, the present invention adopts the moulding of solid casting method, exactly slip is poured into and produced between external mold and the core, the outer shape of base substrate is by producing the external mold decision, and interior shape is determined by core.Therefore, just exceptionally bed die design and the design of interior bed die of bed die design.Outer bed die is determined the augmentation coefficient of its bed die size with the shrinkage of used slip, and carries out goods according to the contour structure size of atomizer and put chi, again according to putting the later dimensional requirement of chi, makes and the corresponding outer bed die of goods profile.And the selection of core is at first considered in the design of interior bed die, the one, and according to the slip casting method moulding process, core will have certain shrinkage in base substrate; The 2nd, core will have plasticity, is easy to form the inner-cavity structure of atomizer complexity; The 3rd, core will be easy to break away from base substrate.The material of present selected core mainly contains foamed plastics, paraffin, plasticine, soft rubber etc., different shaped core material, its molding mode and also different with the disengaging mode of base substrate; Foamed plastics with generally employing is an example, and foamed plastics is very easily by acetone solution.As for shrinkage, different materials are had nothing in common with each other especially.So the augmentation coefficient of interior bed die size is decided with the material of selected core, carry out inner cavity size according to the inner-cavity structure size of atomizer again and put chi, and according to the requirement of putting behind the chi, bed die in making.
Bed die is the basis of moulding process, not only determining the characteristic such as specification, moulding, structure, function of use of product, and production technology adaptability played significant feature, its design, making quality will be subjected to the check of production process, and in production practices, update, constantly perfect, finally reach result of use preferably.
More than be the explanation of internal, outer bed die design, below describe the basic step of the manufacture method of sintering carbonization silicon atomizer in the wet flue gas desulfurizer in detail:
(1) inside and outside bed die is made: with the physical dimension according to the inside and outside bed die of the structural design of atomizer is foundation, adopts machined, artisan craftsmanship adhering method to finish inside and outside bed die and makes;
A kind of in described outer bottom mold materials aluminium alloy, gypsum, epoxy resin, the timber, described in a kind of in the bed die material selection aluminium alloy, gypsum;
(2) produce external mold with the molded work of outer bottom: produce external mold and adopt plaster mold, earlier evenly smear an amount of soft soap water on the bed die outside, place outer bed die in the plaster mold external form mould and fix, calculate the consumption of land plaster according to the stereometer of plaster mold, according to land plaster and 3: 2 weight proportion of water preparation calcium plaster, gypsum with carried out vacuum stirring 1-3 minute after water mixes, make its full and uniform mixing, after screening out decontamination, then slowly in the injection model, once fill with, more in addition slight vibration to get rid of bubble, and make calcium plaster flow into each edges and corners, wait 30 minutes approximately, allow its heating solidify, remove plaster mold external form mould then, take out outer bed die, promptly obtain producing external mold; Gypsum production needs drying after being molded as outward, and its oven dry should be dried 4-5 days in the hothouse between 40-50 ℃, and the uniform drying appropriateness can come into operation;
Gypsum mold is requisite in the slip-casting shaping process, it is to mix and stir the character that the back forms dihydrate gypsum and have curing according to semi-hydrated gypsum powder and water to make, to the requirement of making the used gypsum fine powder of gypsum mold be pure and add water after its presetting period be not less than 9 minutes, final setting time is not more than 30 minutes, so that the molding operation.The land plaster that newly advances will could use after stablizing 2-8 days.
When producing external mold, starch thickness and the definite overall dimensions of producing mould of intensity thereof according to eating of product size, plaster mold earlier with the molded work of outer bottom.
Entire die is wanted stressed and evenly be kept vertical up and down during molding, and produces smooth the nothings dirt of mould inner surface, phenomenon such as pore, impurity can not be arranged, collide with, and surperficial smooth smooth, corner angle are smooth.
(3) make core: make of interior bed die and produce internal mold, make core by producing internal mold again.According to the internal structure of atomizer, make and the corresponding core of atomizer interior shape; The material of core adopts a kind of in paraffin, foamed plastics, plasticine or the soft rubber.
(4) injection forming: adopt the solid casting method, during grouting operation, fibrous root is being produced position, quantity and the size of determining injected hole on the mould according to the concrete structure of atomizer, then, core is fixed in the production external mold, must keeps both central lines, matched moulds slip casting again.Mould must cooperate fastening, places steadily; Will rationally grasp injection speed in the slip casting process, and mould is produced in vibration frequently, to reach best slip casting effect; Inhale in the slurry process at plaster mold, constantly replenish slurry, make slurry keep certain liquid level.The duration of pouring is grasped in requirement according to product size, and observes the thickness of dry layer at any time.After inhaling slurry and finishing, unsuitable too fast too quickly when falling surplus slurry, be out of shape or a slump to prevent dry layer.Determine suitable standing time after the moulding with the size of annotating part, could the demoulding.
Adopt the solid casting method, slurry should possess following condition: 1. little, the good fluidity of viscosity; 2. stable preferably; 3. guaranteeing that water content should be lacked as far as possible under the mobile prerequisite; 4. thixotropy is little; 5. the moisture in the slip is absorbed by die wall by established base substrate easily; 6. the base substrate of Xing Chenging breaks away from from model easily, not with model reaction; 7. do not contain bubble as far as possible.
(5) drying: after the molding blank demoulding, the low temperature drying chamber is sent in first air dry, and core and base substrate broken away from then, temperature between 30-45 ℃, dry 40-60 hour;
(6) biscuit finishing: after the molding blank drying, the defective on the billet surface is repaired;
(7) sintering: send the hyperthermia drying chamber with the base substrate that trims, between 80-100 ℃ dry 10-12 hour, the wind of open cycle simultaneously, get final product the shove charge sintering after finishing, vacuumize in the temperature-rise period and be heated to 1400-1700 ℃, through siliconising, constant temperature, inflated with nitrogen is cooled to 1100-1200 ℃, fills the helium fast cooling to coming out of the stove below 120-150 ℃.
In sintering process, follow the removal of compositions such as the contained solvent of base substrate, adhesive, plasticizer, pore reduces in the base substrate, and bond strength increases between particle, and mechanical strength improves.Sintering process can be defined as with this: after the powder of overmolding is being heated to uniform temperature, begin to shrink, be called sintering being lower than the process that becomes densification, hard sintered body under the melting point substance temperature.
And silicon carbide reaction-sintered constitutes matrix by C or C+SiC, then can be respectively be reacted with it by liquid silicon or silicon steam to generate SiC or newly-generated SiC combines SiC particle in the original body.
Claims (2)
1. the manufacture method of carborundum atomizer in the wet flue gas desulfurizer is characterized in that described manufacture method may further comprise the steps:
(1) inside and outside bed die is made: with the physical dimension according to the inside and outside bed die of the structural design of atomizer is foundation, adopts machined, artisan craftsmanship adhering method to finish inside and outside bed die and makes;
(2) produce external mold with the molded work of outer bottom: produce external mold and adopt plaster mold, earlier evenly smear an amount of soft soap water on the bed die outside, place outer bed die in the plaster mold external form mould and fix, according to land plaster and 3: 2 weight proportion of water preparation calcium plaster, gypsum with carried out vacuum stirring 1-3 minute after water mixes, after screening out decontamination, then also once fill with in the injection model, again in addition slight vibration to get rid of bubble, and make calcium plaster flow into each edges and corners, calcium plaster solidifies the back to be removed plaster mold external form mould and takes out outer bed die, promptly obtains producing external mold; Gypsum production is molded as outward in the hothouse of back between 40-50 ℃ and dried 4-5 days, and the uniform drying appropriateness can come into operation;
(3) make core: make of interior bed die and produce internal mold, make core by producing internal mold again; According to the internal structure of atomizer, make and the corresponding core of atomizer interior shape;
(4) injection forming: adopt the solid casting method, during grouting operation, fibrous root is being produced position, quantity and the size of determining injected hole on the mould according to the concrete structure of atomizer, then, core is fixed in the production external mold, must keeps both central lines, matched moulds slip casting again; Will rationally grasp injection speed in the slip casting process, and mould is produced in vibration frequently;
(5) drying: after the molding blank demoulding, the low temperature drying chamber is sent in first air dry, and core and base substrate broken away from then, temperature between 30-45 ℃, dry 40-60 hour;
(6) biscuit finishing: after the molding blank drying, the defective on the billet surface is repaired;
(7) sintering: send the hyperthermia drying chamber with the base substrate that trims, between 80-100 ℃ dry 10-12 hour, get final product the shove charge sintering after finishing, vacuumize in the temperature-rise period and be heated to 1400-1700 ℃, through siliconising, constant temperature, inflated with nitrogen is cooled to 1100-1200 ℃, fills the helium fast cooling to coming out of the stove below 120-150 ℃.
2. the manufacture method of carborundum atomizer in the wet flue gas desulfurizer as claimed in claim 1 is characterized in that: a kind of in described outer bottom mold materials aluminium alloy, gypsum, epoxy resin, the timber; A kind of in described in the bed die material selection aluminium alloy, gypsum; The material of core adopts a kind of in paraffin, foamed plastics, plasticine or the soft rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100354318A CN100335254C (en) | 2004-07-22 | 2004-07-22 | Manufacturing method of silicon carbide atomization nozzle in wet method stack gas desulfur device |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100354318A CN100335254C (en) | 2004-07-22 | 2004-07-22 | Manufacturing method of silicon carbide atomization nozzle in wet method stack gas desulfur device |
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| CN100335254C CN100335254C (en) | 2007-09-05 |
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| CN102249683A (en) * | 2011-06-15 | 2011-11-23 | 潍坊华美精细技术陶瓷有限公司 | Method for manufacturing silicon carbide cantilever paddle through reaction sintering |
| CN101874974B (en) * | 2009-11-27 | 2011-12-21 | 山东省环保陶瓷工程技术研究中心 | Spiral aluminum oxide ceramic nozzle for flue gas desulfurization slurry atomization and manufacturing method thereof |
| CN105841757A (en) * | 2016-05-04 | 2016-08-10 | 合肥江航飞机装备有限公司 | Method for controlling nozzle diameter of glass nozzle flowmeter |
| CN109453908A (en) * | 2019-01-09 | 2019-03-12 | 山东中鹏特种陶瓷有限公司 | Spiral nozzle manufacturing process |
| CN109520777A (en) * | 2019-01-09 | 2019-03-26 | 山东中鹏特种陶瓷有限公司 | Silicon carbide sample spoon and manufacturing process |
| CN109534837A (en) * | 2019-01-09 | 2019-03-29 | 山东中鹏特种陶瓷有限公司 | Silicon carbide coated graphite saggar and manufacturing process |
| CN111908933A (en) * | 2020-07-30 | 2020-11-10 | 山东中鹏特种陶瓷有限公司 | Preparation method of large-size sintered silicon carbide wear-resistant pipeline |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3237188C2 (en) * | 1982-10-07 | 1986-03-27 | Toshiba Ceramics Co., Ltd., Tokio/Tokyo | Method of making a pouring nozzle |
| JPS59232963A (en) * | 1983-06-11 | 1984-12-27 | 日本坩堝株式会社 | Manufacture of continuous casting nozzle |
| US6510694B2 (en) * | 2000-07-10 | 2003-01-28 | Lockheed Corp | Net molded tantalum carbide rocket nozzle throat |
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2004
- 2004-07-22 CN CNB2004100354318A patent/CN100335254C/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101874974B (en) * | 2009-11-27 | 2011-12-21 | 山东省环保陶瓷工程技术研究中心 | Spiral aluminum oxide ceramic nozzle for flue gas desulfurization slurry atomization and manufacturing method thereof |
| CN102249683A (en) * | 2011-06-15 | 2011-11-23 | 潍坊华美精细技术陶瓷有限公司 | Method for manufacturing silicon carbide cantilever paddle through reaction sintering |
| CN105841757A (en) * | 2016-05-04 | 2016-08-10 | 合肥江航飞机装备有限公司 | Method for controlling nozzle diameter of glass nozzle flowmeter |
| CN109453908A (en) * | 2019-01-09 | 2019-03-12 | 山东中鹏特种陶瓷有限公司 | Spiral nozzle manufacturing process |
| CN109520777A (en) * | 2019-01-09 | 2019-03-26 | 山东中鹏特种陶瓷有限公司 | Silicon carbide sample spoon and manufacturing process |
| CN109534837A (en) * | 2019-01-09 | 2019-03-29 | 山东中鹏特种陶瓷有限公司 | Silicon carbide coated graphite saggar and manufacturing process |
| CN109534837B (en) * | 2019-01-09 | 2021-07-27 | 山东中鹏特种陶瓷有限公司 | Silicon carbide coated graphite sagger and manufacturing process thereof |
| CN109520777B (en) * | 2019-01-09 | 2021-07-27 | 山东中鹏特种陶瓷有限公司 | Silicon carbide sampling spoon and manufacturing process |
| CN111908933A (en) * | 2020-07-30 | 2020-11-10 | 山东中鹏特种陶瓷有限公司 | Preparation method of large-size sintered silicon carbide wear-resistant pipeline |
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