CN1381610A - Local repair method for enamelled surface of enamelled equipment - Google Patents
Local repair method for enamelled surface of enamelled equipment Download PDFInfo
- Publication number
- CN1381610A CN1381610A CN 02117116 CN02117116A CN1381610A CN 1381610 A CN1381610 A CN 1381610A CN 02117116 CN02117116 CN 02117116 CN 02117116 A CN02117116 A CN 02117116A CN 1381610 A CN1381610 A CN 1381610A
- Authority
- CN
- China
- Prior art keywords
- porcelain
- enamel
- cooling
- mending
- calcination process
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
A process for locally repair the enamelled wall of large apparatus includes such steps as cleaning the damaged position, enamelling, calcining, secondary enamelling and calcining again. It features that the said calcining step is gradient isothermal cooling procedure for higher repair effect.
Description
Technical field:
The invention belongs to the manufacturing field of enamel product.Be specially adapted in large-scale enamel equipment, damaged, broken enamelled surface is carried out partial benefit porcelain method.
Background technology:
As everyone knows, in the production of enamel product, generally be that employing is a base material with the metal, and after its surface applied has inorganic ceramic glaze, again goods just can be formed the enamel product of matrix material behind the multiple high temp sintering.The use of present large-scale enamel equipment, mainly be to make in the industry of row at agricultural chemicals, chemical industry, chemical fertilizer and medicine etc., because in the production process of such industry, the enamel material that adopts as the reaction cylinder or the reactor of equipment, be to touch media such as a large amount of strong acid, alkali, with use in the production process that temperature, pressure often change, be one of very important production process to the maintenance and the repairing (because the defective of enamelled surface and the porcelain etc. that collides with) of enamelled surface.Method for repairing and mending to enamelled surface has two kinds in the prior art; First kind is to adopt the physics covering method, and its technological process is to adopt corrosion resistant material (as: gold, platinum, tantalum, tetrafluoro etc.) that encapsulation process is carried out at damaged position, makes the breakage of enamelled surface avoid contacting with medium.The shortcoming of this method is the restriction that is subjected to envrionment conditions, is the sealing property that can influence equipment to the repairing at some position.Next is the method that adopts protective system to hide, but this method is the restriction that will be subjected to temperature in the working conditions, pressure and production medium, because protective system is to be difficult to bear washing away of corrosive medium at high temperature and the failure that causes repairing.Have to prepare enamel again after exactly the enamel of equipment all being removed, its shortcoming is that to prepare production cycle of equipment again long, and the input of fund is also very high again.Therefore also do not seen yet up till now better, in the partial benefit porcelain of enamelled surface breakage method.
Goal of the invention and solution:
The objective of the invention is to propose a kind of easy to operate simple, timing-saving and economic, reasonable fast, and the good enamel equipment local repair porcelain method of result of use.
In the enamel equipment production, optimal mending enamelled effect is not only will be in conjunction with firmly to the enamelled surface matrix of new mend, but also otherwise destroys by the enamelled surface matrix enamel coating around the mend.Therefore the main difficulty of mending porcelain is burnt in the part, be to be to be burnt the Heating temperature of mending the porcelain place and enamelled surface on every side in smaller size range, the thermograde drop is greater than 800 ℃, owing to can produce very big thermograde drop in the part of enamelled surface (quilt is burnt around the benefit porcelain place), different with base material in the enamelled surface and enamel material temperature expansion coefficient, when burning is mended porcelain, make the part of enamelled surface produce very strong internal stress so can cause, so this also is the main internal factor that causes enamel and base material avalanche.Cause local burning to mend the subject matter of porcelain and purpose proposed by the invention according to above-mentioned, the technical solution scheme content that we proposed can be described in detail as follows with reference to the accompanying drawings, the local repair porcelain method of the used enamelled surface breakage of a kind of large-scale enamel equipment, this method is mended operations such as surface, porcelain place, benefit enamel, calcination process, secondary benefit enamel and calcination process and is formed by cleaning, it is characterized in that adopting the gradient isothermal to carry out roasting enamel to repairing the porcelain place again after mending enamel, its technological process is: 1, cleaning is mended behind the porcelain surface and in 200 ℃ and is dried processing; 2, mending porcelain surface spraying cover-coat enamel; 3, adopt the cooling of gradient isothermal to carry out calcination process, a. carries out calcination process to mending porcelain surface enamel at 780 ℃-850 ℃; B, carry out the cooling of gradient isothermal from inside to outside along the scope of peripheral 20cm-60cm and handle mending the porcelain surface; C, handle along the thermograde cooling of carrying out 780 ℃-400 ℃ in the scope of periphery from inside to outside mending the porcelain surface; D, the technology that adopts the cooling of gradient isothermal to handle, be after Heating temperature reaches design temperature should with below 5-15 ℃ of/minute controlled chilling to 400 ℃ again air cooling to room temperature.Other features of enamelled surface breakage local repair porcelain method of the present invention also have when carrying out mending porcelain the second time, should be again to mending the cooling of gradient isothermal is carried out once more in the porcelain surface behind secondary spraying enamel calcination process, the processing system of two subgradient isothermals cooling is: (1), mending porcelain surface secondary spraying cover-coat enamel; (2), adopt the calcination process technology of gradient isothermal cooling carrying out secondary cover-coat enamel to be: e mends porcelain surface cover-coat enamel to secondary and carries out calcination process at 780 ℃-850 ℃; F mends the porcelain surface to secondary and carries out gradient isothermal cooling processing from inside to outside along the scope of peripheral 20cm-60cm; G mends the porcelain surface at secondary and handles along the thermograde isothermal cooling of carrying out 700 ℃-400 ℃ in the scope of periphery from inside to outside; H. the technology that adopts gradient isothermal cooling to handle, be after Heating temperature reaches design temperature should with below 5-12 ℃ of/minute controlled chilling to 400 ℃ again air cooling to room temperature.If the enamelled surface local damage is during to matrix metal plate place, the calcination process that should before mend porcelain for the first time, mend ground-coat enamel earlier and carry out the cooling of gradient isothermal, therefore other feature of the present invention also should be carried out the ground-coat enamel calcination process by first spray repair ground-coat enamel again behind cleaning enamelled surface breakage surface, and its ground-coat enamel calcination process technology is: (1), mending porcelain surface spraying ground-coat enamel; (2), adopt the calcination process technology of gradient isothermal cooling carrying out ground-coat enamel to be: m. should carry out at 900 ℃-940 ℃ the ground-coat enamel calcination process; N, the ground-coat enamel surface is handled along carrying out gradient isothermal cooling in the scope of peripheral 20cm-60cm from inside to outside; P, handle along the thermograde isothermal cooling of carrying out 890 ℃-400 ℃ in the scope of periphery from inside to outside in the ground-coat enamel surface; Q, the technology that adopts the cooling of gradient isothermal to handle, be after Heating temperature reaches design temperature should with below 8-15 ℃ of/minute controlled chilling to 400 ℃ again air cooling to room temperature.Feature in addition of the present invention is in the calcination process process, and the heating spacing between enamelled surface breakage 3 and the electric heater 5 is 10-30mm.
The enamel equipment of the present invention basic functional principle of enamelled surface breakage local repair porcelain method, be that enamelled surface breakage 3 is cleared up (seeing accompanying drawing), when damaged metal sheet 2 places to enamelled surface matrix 1 of enamel, just should carry out the repairing of ground-coat enamel earlier, and then spray enamel and calcination process, according to the needs of enamel equipment working conditions, can also carry out the processing again of secondary spraying enamel and roasting.Because the preparation attribute of enamel class and glassy phase is approximate, with temperature rising gradually, ground-coat enamel and enamel also will soften gradually, when electric heater 5 reaches design temperature, ground-coat enamel and benefit enamel 4 have been in half melting state after the insulation of short period of time, this moment, enamel 4 had good affinity effect with metal sheet 2 places of enamelled surface matrix 1 and the enamel of enamelled surface breakage 3 peripheries, after the enamel of the metal sheet 2 of enamel 4 and enamelled surface breakage 3 and periphery is fused fully, the internal stress elimination of adopting the mode of control cooling rate will be in mending the porcelain process to be produced in to enamelled surface matrix 1 again.The type of heating that is adopted as shown in Figure 1 in the method for the invention, it in electric heater 5 the benefit porcelain roast area domain part that adopts enamelled surface breakage 3, carry out the type of heating of solid matter Heating element 6, in the scope to the partly all peripheral 20cm-60cm in edge of the benefit porcelain of enamelled surface breakage 3, be that successively decreasing of lowering the temperature gradually from inside to outside arranged the type of heating of Heating element 6.The large-scale enamel equipment of the present invention local repair porcelain method of enamelled surface, be to adopt enamel to carry out the concentration of local radiation heating to new spraying, enamel can evenly be fused at enamelled surface breakage 3, and also can with the good affinity of peripheral enamel, because the enamel at enamelled surface breakage 3 peripheries has been preheating to softening temperature by electric heater 5, because the enamel distance from enamelled surface breakage 3 peripheries is far away more, then the temperature of radiation heating is low more, so just can effectively prevent to make enamelled surface produce stronger inherent strain because of vulcanizing porcelain, and new mend at the enamel of enamelled surface breakage 3 identical in conjunction with effect with former enamel on the enamelled surface.
Adopt large-scale enamel equipment of the present invention compared with prior art with the partial benefit porcelain of enamelled surface breakage method, have characteristics such as easy to operate simple, timing-saving and economic and result of use are good, especially in the production scene, the retort or the reactor that can solve soon because of equipment fall the problem that porcelain will stop production and repair.
Description of drawings:
Accompanying drawing 1, local enamelled surface breakage in the enamel equipment is mended the diagrammatic cross-section of facing of porcelain work for adopting the inventive method;
Accompanying drawing 2, local enamelled surface breakage in the enamel equipment is mended the thermograde isothermal cooling calcination process program synoptic diagram of porcelain work for adopting the inventive method;
In the accompanying drawings: 1, be the enamelled surface matrix; 2, be metal sheet; 3, be the enamelled surface breakage; 4, for mending enamel; 5, be electric heater; 6, be Heating element.T
1=780 ℃-940 ℃; T
2〉=400 ℃; R
1Be enamelled surface breakage diameter; R
2For enamelled surface breakage diameter to spacing between the electric heater external diameter.
The specific embodiment mode
Adopt the large-scale enamel equipment of the present invention partial benefit porcelain of enamelled surface breakage method, we have done two groups of tests altogether, in order to contrast conveniently, the testpieces that we adopted is large-scale enamel equipment enamel reactor and an enamel reaction still, employed condition is that material is identical, enamel wall thickness difference (large-scale enamel equipment is that the enamel wall thickness of 15mm and enamel reaction still is 25mm with the enamel wall thickness of enamel reactor), test is two kinds of vertical benefit porcelain method and horizontal benefit porcelain methods, the comparative test result of the embodiment of the invention sees the following form, sequence number 1-4 is the embodiment of the invention in contrast table, wherein sequence number 1,3,5 is enamel reactor, sequence number 2,4,6 is enamel reaction still, and sequence number is 7,8 is the simultaneous test of prior art.Can find out by contrast table, adopt the present invention, have characteristics such as tangible solution production scene practical problems than prior art the partial benefit porcelain of enamelled surface breakage method.Table: the benefit porcelain method of the embodiment of the invention and the simultaneous test of prior art
Claims (4)
1, a kind of large-scale enamel equipment partial benefit porcelain of enamelled surface breakage method, this method is mended operations such as surface, porcelain place, benefit ground-coat enamel and enamel, calcination process, secondary benefit enamel and calcination process and is formed by cleaning, it is characterized in that adopting the cooling of gradient isothermal to carry out calcination process after mending enamel again to the enamelled surface breakage, its technological process is:
(1), cleaning is mended behind the porcelain surface and in 200 ℃ and is dried processing;
(2), mending porcelain surface spraying cover-coat enamel;
(3), adopt the gradient isothermal to carry out calcination process technology to be:
A. carry out calcination process to mending porcelain surface cover-coat enamel at 780 ℃-850 ℃;
B. carry out gradient isothermal cooling processing to mending the porcelain surface from inside to outside along the scope of peripheral 20cm-60cm;
C. mending the porcelain surface along the thermograde isothermal processes of carrying out 780 ℃-400 ℃ in the scope of periphery from inside to outside;
D. the technology that adopts gradient isothermal cooling to handle, be after Heating temperature reaches design temperature should with below 5-15 ℃ of/minute controlled chilling to 400 ℃ again air cooling to room temperature.
2, according to the described benefit porcelain of claim 1 method, it is characterized in that after mending porcelain surface secondary spraying enamel, carrying out the calcination process that the gradient isothermal is lowered the temperature once more, the processing system of two subgradient isothermals cooling is:
(1), mending porcelain surface secondary spraying cover-coat enamel;
(2), adopt the calcination process technology of gradient isothermal cooling carrying out secondary cover-coat enamel to be:
E. secondary is mended porcelain surface cover-coat enamel and carry out calcination process at 780 ℃-850 ℃;
F. secondary is mended the porcelain surface and carry out gradient isothermal cooling processing from inside to outside along the scope of peripheral 20cm-60cm;
G. mending the porcelain surface at secondary handles along the thermograde isothermal cooling of carrying out 700 ℃-400 ℃ in the scope of periphery from inside to outside;
H. the technology that adopts gradient isothermal cooling to handle, be after Heating temperature reaches design temperature should with below 5-12 ℃ of/minute controlled chilling to 400 ℃ again air cooling to room temperature.
3, according to the described benefit porcelain of claim 1 method, it is characterized in that when enamelled surface local damage during to matrix metal plate place, the calcination process of before mending porcelain for the first time, mending ground-coat enamel earlier and carrying out the cooling of gradient isothermal, its technology is the gradient isothermal cooling calcination process that first spray repair ground-coat enamel carries out ground-coat enamel again behind cleaning enamelled surface breakage surface, and its treatment process is:
(1), mending porcelain surface spraying ground-coat enamel;
(2), adopt the calcination process technology of gradient isothermal cooling carrying out ground-coat enamel to be:
M. should carry out at 900 ℃-940 ℃ the ground-coat enamel calcination process;
N, the ground-coat enamel surface is handled along carrying out gradient isothermal cooling in the scope of peripheral 20cm-60cm from inside to outside;
P, handle along the thermograde isothermal cooling of carrying out 890 ℃-400 ℃ in the scope of periphery from inside to outside in the ground-coat enamel surface;
Q, the technology that adopts the cooling of gradient isothermal to handle, be after Heating temperature reaches design temperature should with below 8-15 ℃ of/minute controlled chilling to 400 ℃ again air cooling to room temperature.
According to the described benefit porcelain of claim 1 method, it is characterized in that in the calcination process process that 4, the heating spacing between enamelled surface breakage and the electric heater is 10mm-30mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021171165A CN1153847C (en) | 2002-04-19 | 2002-04-19 | Local repair method for enamelled surface of enamelled equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021171165A CN1153847C (en) | 2002-04-19 | 2002-04-19 | Local repair method for enamelled surface of enamelled equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1381610A true CN1381610A (en) | 2002-11-27 |
| CN1153847C CN1153847C (en) | 2004-06-16 |
Family
ID=4744345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021171165A Expired - Fee Related CN1153847C (en) | 2002-04-19 | 2002-04-19 | Local repair method for enamelled surface of enamelled equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1153847C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407221A (en) * | 2011-09-08 | 2012-04-11 | 金发科技股份有限公司 | Method for repairing enamel kettle by polyaryletherketone resin |
| CN103170794A (en) * | 2013-03-21 | 2013-06-26 | 安徽淮河化工股份有限公司 | Method of mending damage on non-clamping sleeve portion of enamel reaction kettle |
| CN106038421A (en) * | 2016-07-27 | 2016-10-26 | 福建春辉生物工程有限公司 | Antipruritic skin cream containing well-aged wild tea oil and its preparation method |
| CN115341215A (en) * | 2022-09-21 | 2022-11-15 | 浙江开尔新材料股份有限公司 | Repairing method for ultra-smooth enamel plate |
-
2002
- 2002-04-19 CN CNB021171165A patent/CN1153847C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102407221A (en) * | 2011-09-08 | 2012-04-11 | 金发科技股份有限公司 | Method for repairing enamel kettle by polyaryletherketone resin |
| CN102407221B (en) * | 2011-09-08 | 2014-02-19 | 金发科技股份有限公司 | Method for repairing enamel kettle by polyaryletherketone resin |
| CN103170794A (en) * | 2013-03-21 | 2013-06-26 | 安徽淮河化工股份有限公司 | Method of mending damage on non-clamping sleeve portion of enamel reaction kettle |
| CN106038421A (en) * | 2016-07-27 | 2016-10-26 | 福建春辉生物工程有限公司 | Antipruritic skin cream containing well-aged wild tea oil and its preparation method |
| CN115341215A (en) * | 2022-09-21 | 2022-11-15 | 浙江开尔新材料股份有限公司 | Repairing method for ultra-smooth enamel plate |
| CN115341215B (en) * | 2022-09-21 | 2024-05-14 | 浙江开尔新材料股份有限公司 | Repairing method of ultra-smooth enamel plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1153847C (en) | 2004-06-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103177972A (en) | Annealing process of sapphire substrate material | |
| CN1153847C (en) | Local repair method for enamelled surface of enamelled equipment | |
| CN104032104A (en) | Vacuum heat-treatment experimental method under conventional condition | |
| CN106222673A (en) | A kind of annular turns end flexibility heat-treatment production line and heat treatment method thereof | |
| CN105364429A (en) | Manufacturing method of thick-walled two-phase stainless steel gland | |
| CN105140085B (en) | A kind of processing technology of glass lamp | |
| CN109664628A (en) | A kind of production method of novel dumb light anti-dazzle glas | |
| CN106830697A (en) | A kind of method for preparing safety glass | |
| CN107876512A (en) | A kind of environmental protection carbonization deinking process | |
| CN104783667A (en) | Electric rice cooker glass panel processing technology | |
| CN214666017U (en) | Novel sand bar oven | |
| CN109721228A (en) | A kind of production method of glass | |
| CN206496644U (en) | A kind of whirlwind body of heater | |
| CN103320598A (en) | Heating device applied to blade production | |
| CN105755269A (en) | Piston ring heat treatment process | |
| CN203229562U (en) | Bell-type furnace for copper processing | |
| CN107586930A (en) | A kind of surface treatment method for mild steel | |
| CN104743832A (en) | Glass-welded plain vacuum glass with edges sealed by sealing grooves and manufacturing method thereof | |
| CN104743851A (en) | Glass-welded plane double-vacuum-layer glass having installing holes at edge sealed by sealing strips | |
| CN108148998A (en) | A kind of wire heat treatment process | |
| Arvizzigno | New Control Systems For Vitreous Enamel Coatings on Aluminium | |
| CN105755245A (en) | Heat treatment process of 42CrMoE piston rod | |
| CN104743840A (en) | Plain double-vacuum-layer glass by glass welding at sealed edge of sealing strip and production method thereof | |
| CN108148955A (en) | Drive plate heat-treatment processing process | |
| CN104743847A (en) | Convex vacuum glass by glass welding at sealed edge of sealing groove and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |