CN112629161A - Zirconium oxide high-temperature microwave drying corrosion prevention technology - Google Patents
Zirconium oxide high-temperature microwave drying corrosion prevention technology Download PDFInfo
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- CN112629161A CN112629161A CN202011431373.6A CN202011431373A CN112629161A CN 112629161 A CN112629161 A CN 112629161A CN 202011431373 A CN202011431373 A CN 202011431373A CN 112629161 A CN112629161 A CN 112629161A
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- zirconia
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- microwave drying
- treatment
- hot air
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- 238000001035 drying Methods 0.000 title claims abstract description 82
- 238000005536 corrosion prevention Methods 0.000 title claims abstract description 9
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 title claims description 4
- 229910001928 zirconium oxide Inorganic materials 0.000 title claims description 4
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 192
- 238000011282 treatment Methods 0.000 claims abstract description 34
- 238000007602 hot air drying Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000003892 spreading Methods 0.000 claims abstract description 11
- 230000007480 spreading Effects 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 9
- 238000011221 initial treatment Methods 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 5
- 238000012216 screening Methods 0.000 claims description 5
- 238000005054 agglomeration Methods 0.000 abstract description 8
- 230000002776 aggregation Effects 0.000 abstract description 8
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000012671 ceramic insulating material Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910000449 hafnium oxide Inorganic materials 0.000 description 1
- WIHZLLGSGQNAGK-UHFFFAOYSA-N hafnium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Hf+4] WIHZLLGSGQNAGK-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000003605 opacifier Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B1/00—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids
- F26B1/005—Preliminary treatment of solid materials or objects to facilitate drying, e.g. mixing or backmixing the materials to be dried with predominantly dry solids by means of disintegrating, e.g. crushing, shredding, milling the materials to be dried
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
- F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
- F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/048—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum in combination with heat developed by electro-magnetic means, e.g. microwave energy
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Microbiology (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention provides a zirconia high-temperature microwave drying anticorrosion technology, and relates to the field of zirconia drying. The zirconia high-temperature microwave drying corrosion prevention technology comprises the following drying steps: s1, pretreatment: performing primary crushing treatment on zirconia to be subjected to drying treatment, spreading the zirconia on a screen mesh in the crushing process, crushing the zirconia in a vibration mode, and collecting crushed zirconia particles; s2, primary treatment: the crushed zirconia is spread on a conveyor belt, and then the zirconia is conveyed to a hot air drying area by the conveyor belt, the zirconia is subjected to primary drying on the surface in the hot air drying area, and the surface temperature of the zirconia is raised. Through carrying out pretreatment before carrying out microwave drying to zirconia for zirconia's the caking volume obtains improving, and can reduce the phenomenon of agglomeration, provides the guarantee for the microwave drying in later stage, and then is favorable to the high-efficient of drying to go on.
Description
Technical Field
The invention relates to the technical field of zirconia drying, in particular to a zirconia high-temperature microwave drying corrosion prevention technology.
Background
Zirconia (chemical formula: ZrO2) is a main oxide of zirconium, and is generally a white odorless and tasteless crystal, which is poorly soluble in water, hydrochloric acid, and dilute sulfuric acid. Typically, small amounts of hafnium oxide are present. The chemical property is inactive, and the material has the properties of high melting point, high resistivity, high refractive index and low thermal expansion coefficient, so that the material becomes an important high temperature resistant material, a ceramic insulating material and a ceramic opacifier, and is also a main raw material of the artificial drill.
At present, drying treatment of zirconia is involved in the production process of zirconia, the conventional heating method for drying is long in drying time and high in cost, and does not meet the requirements of energy-saving production, and a microwave drying method is generated along with the conventional heating method.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a zirconia high-temperature microwave drying anticorrosion technology, which solves the problem that the drying production efficiency and the drying quality can not be further improved because the existing microwave drying mode is not perfect.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a zirconia high-temperature microwave drying corrosion prevention technology comprises the following drying steps:
s1, pretreatment: performing primary crushing treatment on zirconia to be subjected to drying treatment, spreading the zirconia on a screen mesh in the crushing process, crushing the zirconia in a vibration mode, and collecting crushed zirconia particles;
s2, primary treatment: spreading the crushed zirconia on a conveyor belt, conveying the zirconia to a hot air drying area by using the conveyor belt, and primarily drying the zirconia on the surface of the zirconia in the hot air drying area, wherein the surface temperature of the zirconia is increased;
s3, microwave drying: the zirconia subjected to primary drying treatment in the hot air drying area enters the microwave drying area under the transmission of the conveyor belt and is subjected to vacuum environment in the microwave drying process, and finally the dried zirconia is obtained
Preferably, the mesh diameter of the screening net in the S1 is not more than 15 mm.
Preferably, the frequency of the vibration frequency crushing in the S1 is 50-100 times/S.
Preferably, the thickness of the spread and conveying belt of the zirconia in the S2 is not more than 1.5 cm.
Preferably, the temperature of the hot air zone in the S2 is 40-55 ℃, the wind speed of the hot air zone is 0.1-0.3m/S, and the treatment time of the hot air zone is 15-30 min.
Preferably, the vacuum degree of the vacuum environment in the S3 is 0.015-0.035 Mpa.
Preferably, the microwave drying in S3 adopts a gradient-decreasing process.
Preferably, the gradient decreasing means respectively comprises a first gradient microwave power of 600-.
(III) advantageous effects
The invention provides a zirconia high-temperature microwave drying corrosion prevention technology. The method has the following beneficial effects:
1. through carrying out pretreatment before carrying out microwave drying to zirconia for zirconia's the caking volume obtains improving, and can reduce the phenomenon of agglomeration, provides the guarantee for the microwave drying in later stage, and then is favorable to the high-efficient of drying to go on.
2. Through the treatment that reduces the gradient formula, not only can guarantee the high-efficient discharge of the inside moisture of zirconia when carrying out microwave drying to can avoid zirconia to receive the damage in the environment that lasts high strength processing.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides a zirconia high-temperature microwave drying anticorrosion technology, which comprises the following drying steps:
s1, pretreatment: performing primary crushing treatment on zirconia to be subjected to drying treatment, spreading the zirconia on a screen mesh in the crushing process, crushing the zirconia in a vibration mode, and collecting crushed zirconia particles;
s2, primary treatment: spreading the crushed zirconia on a conveyor belt, conveying the zirconia to a hot air drying area by using the conveyor belt, and primarily drying the zirconia on the surface of the zirconia in the hot air drying area, wherein the surface temperature of the zirconia is increased;
s3, microwave drying: the zirconia subjected to primary drying treatment in the hot air drying area enters the microwave drying area under the transmission of the conveyor belt, and is subjected to vacuum environment in the microwave drying process, so that the dried zirconia is finally obtained.
Wherein the mesh diameter of the screening net in S1 is 14 mm.
Wherein the frequency of the vibration frequency crushing in S1 is 50 times/S.
Wherein the zirconia in S2 was spread out to a thickness of 1.2cm of the belt.
Wherein the temperature of the hot air zone in S2 is 40 ℃, the wind speed of the hot air zone is 0.1m/S, and the processing time of the hot air zone is 30 min.
Wherein the vacuum degree of the vacuum environment in S3 is 0.015 MPa.
Wherein the microwave drying in S3 adopts gradient-decreasing treatment.
Wherein the gradient reduction formula comprises a first gradient microwave power of 600W, a treatment time of 6min, a second gradient microwave power of 400W, a treatment time of 12min, a third gradient microwave power of 300W, and a treatment time of 20 min.
Example two:
a zirconia high-temperature microwave drying corrosion prevention technology comprises the following drying steps:
s1, pretreatment: performing primary crushing treatment on zirconia to be subjected to drying treatment, spreading the zirconia on a screen mesh in the crushing process, crushing the zirconia in a vibration mode, and collecting crushed zirconia particles;
s2, primary treatment: spreading the crushed zirconia on a conveyor belt, conveying the zirconia to a hot air drying area by using the conveyor belt, and primarily drying the zirconia on the surface of the zirconia in the hot air drying area, wherein the surface temperature of the zirconia is increased;
s3, microwave drying: the zirconia subjected to primary drying treatment in the hot air drying area enters the microwave drying area under the transmission of the conveyor belt, and is subjected to vacuum environment in the microwave drying process, so that the dried zirconia is finally obtained.
Wherein the mesh diameter of the screening net in S1 is 10 mm.
Wherein the frequency of the vibration frequency crushing in S1 is 80 times/S.
Wherein the zirconia in S2 was spread out to a thickness of 1cm of the belt.
Wherein the temperature of the hot air zone in S2 is 45 ℃, the wind speed of the hot air zone is 0.15m/S, and the processing time of the hot air zone is 25 min.
Wherein the vacuum degree of the vacuum environment in S3 is 0.025 MPa.
Wherein the microwave drying in S3 adopts gradient-decreasing treatment.
The gradient reduction formula comprises a first gradient microwave power of 700W, a treatment time of 5min, a second gradient microwave power of 500W, a treatment time of 10min, a third gradient microwave power of 350W, and a treatment time of 16 min.
Example three:
a zirconia high-temperature microwave drying corrosion prevention technology comprises the following drying steps:
s1, pretreatment: performing primary crushing treatment on zirconia to be subjected to drying treatment, spreading the zirconia on a screen mesh in the crushing process, crushing the zirconia in a vibration mode, and collecting crushed zirconia particles;
s2, primary treatment: spreading the crushed zirconia on a conveyor belt, conveying the zirconia to a hot air drying area by using the conveyor belt, and primarily drying the zirconia on the surface of the zirconia in the hot air drying area, wherein the surface temperature of the zirconia is increased;
s3, microwave drying: the zirconia subjected to primary drying treatment in the hot air drying area enters the microwave drying area under the transmission of the conveyor belt, and is subjected to vacuum environment in the microwave drying process, so that the dried zirconia is finally obtained.
Wherein the mesh diameter of the screening net in S1 is 8 mm.
Wherein the frequency of the vibration frequency crushing in S1 is 100 times/S.
Wherein the zirconia in S2 was spread out to a thickness of 0.8cm in the belt.
Wherein the temperature of the hot air zone in S2 is 55 ℃, the wind speed of the hot air zone is 0.3m/S, and the processing time of the hot air zone is 15 min.
Wherein the vacuum degree of the vacuum environment in S3 is 0.035 Mpa.
Wherein the microwave drying in S3 adopts gradient-decreasing treatment.
Wherein the gradient reduction formula comprises that the first gradient microwave power is 800W, the processing time is 4min, the second gradient microwave power is 600W, the processing time is 8min, the third gradient microwave power is 400W, and the processing time is 12 min.
Comparative example one:
and (3) performing equal-time zirconium oxide drying treatment by adopting a traditional microwave heating mode.
Comparative example two:
the decreasing gradient process is changed to the increasing gradient process.
Comparative example three:
the microwave drying is directly carried out without pretreatment and primary treatment.
The experimental results are as follows:
| phenomenon(s) | Water content | |
| Example one | No new agglomeration | 15.2％ |
| Example two | No new agglomeration | 8.5％ |
| EXAMPLE III | No new agglomeration | 13.1％ |
| Comparative example 1 | Has more agglomeration | 25.0％ |
| Comparative example No. two | No new agglomeration and slight color change on the surface | 18.9％ |
| Comparative example No. three | Has more agglomeration | 16.6％ |
Experiments show that the drying method provided by the invention can ensure the drying efficiency and has excellent product quality in the later period.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The high-temperature microwave drying corrosion prevention technology for the zirconium oxide is characterized by comprising the following steps of: the method comprises the following drying steps:
s1, pretreatment: performing primary crushing treatment on zirconia to be subjected to drying treatment, spreading the zirconia on a screen mesh in the crushing process, crushing the zirconia in a vibration mode, and collecting crushed zirconia particles;
s2, primary treatment: spreading the crushed zirconia on a conveyor belt, conveying the zirconia to a hot air drying area by using the conveyor belt, and primarily drying the zirconia on the surface of the zirconia in the hot air drying area, wherein the surface temperature of the zirconia is increased;
s3, microwave drying: the zirconia subjected to primary drying treatment in the hot air drying area enters the microwave drying area under the transmission of the conveyor belt, and is subjected to vacuum environment in the microwave drying process, so that the dried zirconia is finally obtained.
2. The zirconia high-temperature microwave drying anticorrosion technology according to claim 1, characterized in that: the mesh diameter of the screening net in the S1 is not more than 15 mm.
3. The zirconia high-temperature microwave drying anticorrosion technology according to claim 1, characterized in that: the frequency of the vibration frequency crushing in the S1 is 50-100 times/S.
4. The zirconia high-temperature microwave drying anticorrosion technology according to claim 1, characterized in that: the thickness of the spread zirconia and the conveyor belt in the S2 is not more than 1.5 cm.
5. The zirconia high-temperature microwave drying anticorrosion technology according to claim 1, characterized in that: the temperature of the hot air zone in the S2 is 40-55 ℃, the wind speed of the hot air zone is 0.1-0.3m/S, and the processing time of the hot air zone is 15-30 min.
6. The zirconia high-temperature microwave drying anticorrosion technology according to claim 1, characterized in that: the vacuum degree of the vacuum environment in the S3 is 0.015-0.035 Mpa.
7. The zirconia high-temperature microwave drying anticorrosion technology according to claim 1, characterized in that: and in the step S3, a gradient reduction treatment is adopted during microwave drying.
8. The zirconia high-temperature microwave drying anticorrosion technology according to claim 7, wherein: the gradient reduction formula comprises a first gradient microwave power of 600-800W, a treatment time of 4-6min, a second gradient microwave power of 400-600W, a treatment time of 8-12min, a third gradient microwave power of 300-400W and a treatment time of 12-20 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011431373.6A CN112629161A (en) | 2020-12-07 | 2020-12-07 | Zirconium oxide high-temperature microwave drying corrosion prevention technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011431373.6A CN112629161A (en) | 2020-12-07 | 2020-12-07 | Zirconium oxide high-temperature microwave drying corrosion prevention technology |
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| Publication Number | Publication Date |
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| CN112629161A true CN112629161A (en) | 2021-04-09 |
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| CN202011431373.6A Pending CN112629161A (en) | 2020-12-07 | 2020-12-07 | Zirconium oxide high-temperature microwave drying corrosion prevention technology |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10217011A1 (en) * | 2002-04-16 | 2003-11-13 | Ibt Infrabio Tech Gmbh | Emitter for infrared radiation of biological material |
| CN102313446A (en) * | 2010-06-30 | 2012-01-11 | 北新集团建材股份有限公司 | Intelligent hot-air microwave paper-surface plaster-plate drying system |
| CN108592525A (en) * | 2018-04-18 | 2018-09-28 | 北京工商大学 | A kind of drying cooling means of pellet |
| CN108970696A (en) * | 2018-07-10 | 2018-12-11 | 山西中聚晶科半导体有限公司 | A kind of zirconium oxide crushing and screening device for sapphire thermal field |
| CN109869986A (en) * | 2017-12-05 | 2019-06-11 | 贺州学院 | A kind of method of fresh ginger slice vacuum microwave drying |
| CN110671919A (en) * | 2019-10-28 | 2020-01-10 | 杭州而然科技有限公司 | Microwave drying equipment for metal oxide ceramic material |
-
2020
- 2020-12-07 CN CN202011431373.6A patent/CN112629161A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10217011A1 (en) * | 2002-04-16 | 2003-11-13 | Ibt Infrabio Tech Gmbh | Emitter for infrared radiation of biological material |
| CN102313446A (en) * | 2010-06-30 | 2012-01-11 | 北新集团建材股份有限公司 | Intelligent hot-air microwave paper-surface plaster-plate drying system |
| CN109869986A (en) * | 2017-12-05 | 2019-06-11 | 贺州学院 | A kind of method of fresh ginger slice vacuum microwave drying |
| CN108592525A (en) * | 2018-04-18 | 2018-09-28 | 北京工商大学 | A kind of drying cooling means of pellet |
| CN108970696A (en) * | 2018-07-10 | 2018-12-11 | 山西中聚晶科半导体有限公司 | A kind of zirconium oxide crushing and screening device for sapphire thermal field |
| CN110671919A (en) * | 2019-10-28 | 2020-01-10 | 杭州而然科技有限公司 | Microwave drying equipment for metal oxide ceramic material |
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