CN106555029A - VOD stove vacuum cover fast repairing methods - Google Patents
VOD stove vacuum cover fast repairing methods Download PDFInfo
- Publication number
- CN106555029A CN106555029A CN201510635773.1A CN201510635773A CN106555029A CN 106555029 A CN106555029 A CN 106555029A CN 201510635773 A CN201510635773 A CN 201510635773A CN 106555029 A CN106555029 A CN 106555029A
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- CN
- China
- Prior art keywords
- vacuum cover
- refractory material
- inner lining
- lining refractory
- anchoring piece
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The present invention relates to VOD stoves, more particularly to the vacuum cover of VOD stoves.A kind of VOD stoves vacuum cover fast repairing method, it includes：Vacuum cover inner lining refractory material anchoring piece is made and arranged, is 1Cr18Ni9Ti with stainless steel, the Y type anchoring pieces that band steel makes, length is 150mm, and spacing is 200mm；Design of length according to anchoring piece is less than 20～30mm of inner lining refractory material surface；Hexsteel is installed, dress height is away from inner lining refractory material work surface 80mm；Using including that ultra-low cement reduces corundum, titanium calcium aluminate, mullite, the heavy spray paint of carborundum and adopts wet spray, heat-insulation layer selects adiabatic haydite, the spray paint of alumina hollow ball matter simultaneously to adopt dry spraying to working lining.The present invention can complete lining processing in the case where not overturning.The dismounting of lid, lifting upset, cast maintenance link will be reduced, effectively can be shortened on construction period, and avoid the damage of liner body quality that construction link causes.
Description
Technical field
The present invention relates to VOD stoves, more particularly to the vacuum cover of VOD stoves.
Background technology
VOD stoves are metallurgical refining furnace of the metallurgy industry using vacuum-oxygen decarbonizing technique.VOD stoves are made up of vacuum cover, tank body, ladle, are refractory lining on the inside of vacuum cover.As the efficiency and smelting yield of refine link important in process for making, the persistence of smelting and activity duration decision steelmaking system.
VOD stoves vacuum cover is affected by the factors such as high temperature, negative pressure of vacuum, vibrations and equipment replacement are smelted due to long-term, resistance to material at the top of vacuum cover easily comes off, and anchoring piece is badly damaged, so as to cause head temperature too high, the normal production run of the equipment and service life will be had a strong impact on, generally only 3 months.
The vacuum cover of metallurgy VOD refining furnaces adopts castable casting and constructing at present, will about 7 meters of vacuum covers of diameter pull down, then by lifting by crane upset, will be inside top upset outside, complete castable to construct from the top down, after needing maintenance certain hour liner to be cast that there is some strength after casting complete, could be overturn to operating position again.Because vacuum cover is relatively large in diameter, heavier-weight, dismounting and upset are all abnormal difficult, the natural curing of castable is also required to the long duration, as do not conserved thoroughly, then lid is in switching process and pour mass easily occurs using early stage and loosens and come off, and causes vacuum cover normally cannot use, the activity duration will be had a strong impact on, and great economic loss be caused to steel mill.
The content of the invention
It is contemplated that overcoming the defect of prior art, there is provided a kind of VOD stoves vacuum cover fast repairing method.The present invention can complete lining processing in the case where not overturning.The dismounting of lid, lifting upset, cast maintenance link will be reduced, effectively can be shortened on construction period, and avoid the damage of liner body quality that construction link causes.
In order to solve above-mentioned technical problem, a kind of VOD stoves vacuum cover fast repairing method, it includes：
Vacuum cover inner lining refractory material anchoring piece is made and arranged, is the Y type anchoring pieces that 1Cr18Ni9Ti band steels make with stainless steel, length is 150mm, and spacing is 200mm；Design of length according to anchoring piece is less than 20～30mm of inner lining refractory material surface；
Hexsteel is installed, dress height is away from inner lining refractory material work surface 80mm；
Using including that ultra-low cement reduces corundum, titanium calcium aluminate, mullite, the heavy spray paint of carborundum and adopts wet spray, heat-insulation layer selects adiabatic haydite, the spray paint of alumina hollow ball matter simultaneously to adopt dry spraying to working lining.
The present invention adds hexsteel composite wet spraying coating process using anchoring piece, then vacuum cover can complete lining processing in the case where not overturning.The restorative procedure of the present invention reduces lid dismounting, lifting upset, cast maintenance link, changes the form of construction work of conventional vacuum lid reparation, effectively reduces construction intensity and construction period, reach the quick reparation of vacuum cover.The present invention passes through the combination of construction technology and material, realizes VOD stove vacuum cover life-time dilatations, and service life is improved to 2 years by 3 months before.
Specific embodiment
A kind of VOD stoves vacuum cover fast repairing method of the present invention, it includes：
(1) the type selecting of anchoring piece
The thickness of original design vacuum cover inner lining refractory material is 180mm, is less than 20～30mm of inner lining surface according to the Design of length principle of anchoring piece.The temperature of vacuum cover liner work surface is normally at 1500 DEG C～1700 DEG C, and is in oxidative environment.Then from energy high temperature resistant and sludge proof material, anchoring piece band steel structure is more conducive to firm welding than the cylindricality of round steel to anchoring piece, and higher to the fastening force of resistance to material.It is 1Cr18Ni9Ti using stainless steel, 8mm is thick, the Y type anchoring pieces that width 30mm band steels make, and length is 150mm, and spacing is 200mm.
(2) the setting height(from bottom) of hexsteel
Network structure of the hexsteel using 200*200 grids, setting height(from bottom) combine the thickness of anchor arrangement feature and sprayed coating, determine that setting height(from bottom) is away from liner work surface 80mm.
(3) the research and development of composite spraying material
The smelting environment of vacuum cover：Up to 1500 DEG C～1700 DEG C, in smelting process, slag splashes the temperature of working lining, and liner is chronically in oxidizing atmosphere, the erosion of high-temperature flue gas.The thickness of vacuum cover liner is certain, working lining research and development antioxidation, high temperature resistant, the ultra-low cement that resistance to flue gas corrodes reduces corundum, titanium calcium aluminate, mullite, carborundum heavy wet spray material, heat-insulation layer selects bulk density very light, there is certain physical strength, the adiabatic haydite of excellent thermal conductivity, the dry spraying material of alumina hollow ball matter in room temperature and high temperature.
(4) composite spraying technique
Heat-insulation layer adopts dry spraying technique, working lining to adopt wet spray technique.
The present invention combine vacuum cover own vol and weight be larger not easy to remove and upset, inner lining refractory material are corroded by high temperature, negative pressure, flue gas, factor usage cycles are shorter, the characteristic that VOD stoves uninterruptedly must be smelted for vibrations etc., be adapted to the sprayed on material of the working of a furnace environment using the construction technology of dry and wet composite spraying, research and development well and the type selecting and arrangement with reference to anchoring piece and hexsteel change the traditional restorative procedure of vacuum cover.Construction efficiency, three aspects of construction period and service life are all significantly improved.The first half that wherein construction period is foreshortened to, service life are improved to 2 years by 3 months before.
Claims (1)
1. a kind of VOD stoves vacuum cover fast repairing method, it is characterised in that it includes：
Vacuum cover inner lining refractory material anchoring piece is made and arranged, is the Y type anchoring pieces that 1Cr18Ni9Ti band steels make with stainless steel, length is 150mm, and spacing is 200mm；Design of length according to anchoring piece is less than 20～30mm of inner lining refractory material surface；
Hexsteel is installed, dress height is away from inner lining refractory material work surface 80mm；
Using including that ultra-low cement reduces corundum, titanium calcium aluminate, mullite, the heavy spray paint of carborundum and adopts wet spray, heat-insulation layer selects adiabatic haydite, the spray paint of alumina hollow ball matter simultaneously to adopt dry spraying to working lining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510635773.1A CN106555029A (en) | 2015-09-30 | 2015-09-30 | VOD stove vacuum cover fast repairing methods |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510635773.1A CN106555029A (en) | 2015-09-30 | 2015-09-30 | VOD stove vacuum cover fast repairing methods |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106555029A true CN106555029A (en) | 2017-04-05 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510635773.1A Pending CN106555029A (en) | 2015-09-30 | 2015-09-30 | VOD stove vacuum cover fast repairing methods |
Country Status (1)
| Country | Link |
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| CN (1) | CN106555029A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107311677A (en) * | 2017-07-12 | 2017-11-03 | 武汉科技大学 | A kind of titanium calcium aluminate mullite Multiphase refractory material and preparation method thereof |
| CN109809804A (en) * | 2017-11-21 | 2019-05-28 | 中冶建筑研究总院有限公司 | A kind of wet injection material and preparation method thereof |
| CN111895103A (en) * | 2020-08-10 | 2020-11-06 | 扬州高标机械有限公司 | High-temperature anti-deformation double-seal flue gas valve |
| CN114517022A (en) * | 2022-01-27 | 2022-05-20 | 上海联净电子科技有限公司 | Wear-resistant anti-adhesion coating and preparation method and application thereof |
-
2015
- 2015-09-30 CN CN201510635773.1A patent/CN106555029A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107311677A (en) * | 2017-07-12 | 2017-11-03 | 武汉科技大学 | A kind of titanium calcium aluminate mullite Multiphase refractory material and preparation method thereof |
| CN107311677B (en) * | 2017-07-12 | 2020-04-24 | 武汉科技大学 | Calcium titanoaluminate-mullite complex phase refractory material and preparation method thereof |
| CN109809804A (en) * | 2017-11-21 | 2019-05-28 | 中冶建筑研究总院有限公司 | A kind of wet injection material and preparation method thereof |
| CN111895103A (en) * | 2020-08-10 | 2020-11-06 | 扬州高标机械有限公司 | High-temperature anti-deformation double-seal flue gas valve |
| CN114517022A (en) * | 2022-01-27 | 2022-05-20 | 上海联净电子科技有限公司 | Wear-resistant anti-adhesion coating and preparation method and application thereof |
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Application publication date: 20170405 |
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| WD01 | Invention patent application deemed withdrawn after publication |