CN105130195A - Continuous casting nozzle surface layer sealing agent and using method thereof - Google Patents
Continuous casting nozzle surface layer sealing agent and using method thereof Download PDFInfo
- Publication number
- CN105130195A CN105130195A CN201510669485.8A CN201510669485A CN105130195A CN 105130195 A CN105130195 A CN 105130195A CN 201510669485 A CN201510669485 A CN 201510669485A CN 105130195 A CN105130195 A CN 105130195A
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- sealing agent
- nozzle
- surface layer
- top layer
- hole sealing
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Abstract
The invention relates to a continuous casting nozzle surface layer sealing agent and a using method thereof. The sealing agent is composed of PbO, SiO2, B2O3 and H2O. The surface layer of a nozzle is coated with the sealing agent in a spraying or brushing mode. The inorganic coating including PbO, SiO2, B2O3 and H2O is subjected to coating particle fusion on the surface layer of the nozzle at the temperature of 900-1100 DEG C in the casting process, after being fused, the coating is extended to form a thin liquid glass membrane, and the sealing agent has the advantages of being good in sealing performance, resistant to high temperature and capable of preventing disengagement; the porosity of the surface layer of the nozzle is reduced by more than 95% compared with the porosity generated when hole sealing is not performed, and the sealing agent can effectively seal a hole or crack in the surface layer of the nozzle. Oxidizing gas is completely prevented from entering the nozzle through the surface layer of the nozzle, scaffolding and blocking of the inner wall of the nozzle are avoided, and the continuous casting efficiency and the product quality are improved; meanwhile, solidification of the coating is achieved by directly utilizing the pouring steel temperature, and the sealing agent has the advantages of saving energy and being convenient and fast to use.
Description
Technical field
The present invention relates to a kind of hole sealing agent and using method thereof, especially for hole sealing agent and the using method thereof on iron and steel enterprise's continous casting sprue top layer.
Background technology
In steel casting process, frequent nozzle clogging or latch up phenomenon are difficult problems of puzzlement continuous casting working procedure always, and nozzle clogging or blocking not only reduce the production efficiency of continuous caster, and are the one of the main reasons causing steel products to produce defect; Therefore, the dross or the blockage problem tool that solve the mouth of a river are of great significance.Current most enterprise adopts protection of inert gas water-gap pouring to play a role; but because gas shield is only worked near interface; and the mouth of a river itself is owing to there being micro-pore; add being flowing in mouth of a river inwall fast and producing certain negative pressure of molten steel when watering steel; thus extraneous air is easily entered in the mouth of a river through top layer, the mouth of a river, and react with Al in molten steel and form Al
2o
3, wherein some retention blocking of luming at mouth of a river internal surface; For controlling dross and blocking in the mouth of a river further, need to reduce or stop oxidizing gas to be sent to resistance to material-molten steel interface, the mouth of a river by top layer, the mouth of a river, and cover one deck dense protective coatings at the mouth of a river skin surface oxidizing gas can be avoided to spread, solve nozzle clogging problem, also can reduce the loss of Al in steel pouring process, be reduced to a point fluctuation; In addition, because when watering steel, mouth of a river exospheric temperature is at 900 DEG C ~ 1100 DEG C, therefore the coating on the resistance to material in mouth of a river surface also will have resistant to elevated temperatures feature and could effectively stop entering of oxidizing gas.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of continous casting sprue top layer hole sealing agent and using method thereof, this hole sealing agent automatically can be molten into the liquid glass layer of high compactness in steel pouring process, outer wall hole crack, the mouth of a river is sealed, isolating oxygen oxidizing gases, stop the blocking that nozzle clogging causes, solve background technology defect.
For solving the problems of the technologies described above, the technical solution used in the present invention is:
Continous casting sprue top layer hole sealing agent, by PbO, SiO
2, B
2o
3and H
2o forms.
Above-mentioned continous casting sprue top layer hole sealing agent, described PbO, SiO
2, B
2o
3and H
2the weight part ratio of O is: 2:(38 ± 5): (28 ± 3): (32 ± 4).
The using method of above-mentioned continous casting sprue top layer hole sealing agent, adopts brushing mode to be coated on top layer, the mouth of a river by hole sealing agent, drying at room temperature 2 ~ 5h after brushing.
The using method of above-mentioned continous casting sprue top layer hole sealing agent, adopts spraying method to be coated on top layer, the mouth of a river by hole sealing agent, drying at room temperature 2 ~ 5h after spraying.
The using method of above-mentioned continous casting sprue top layer hole sealing agent, top layer, mouth of a river hole sealing agent coat-thickness controls at 30 ~ 50 microns.
Beneficial effect of the present invention is:
PbO+SiO of the present invention
2+ B
2o
3+ H
2o inorganic coating directly utilizes and waters the solidification that steel temperature realizes coating, in casting cycle, coating particles melting can be there is at the temperature on 900 DEG C ~ 1100 DEG C, top layer, the mouth of a river, the liquid glass film that one deck is thin is extended into after melting, there is the feature of good stopping property, high temperature resistant, slip-off preventing, top layer, mouth of a river porosity is made to reduce by more than 95% than during non-sealing of hole, can hole and crack on top layer, the effective sealing mouth of a river.Thoroughly stopping oxidizing gas enters in the mouth of a river by top layer, the mouth of a river, anti-waterstop port inwall dross and blocking, improves casting efficiency and quality product; Meanwhile, the present invention directly utilizes and waters the solidification that steel temperature realizes coating, has save energy, advantage easy to use.
Accompanying drawing explanation
Scanning electron microscope (SEM) photograph when Fig. 1 is the uncoated coating in top layer, the mouth of a river of the present invention;
Fig. 2 is the scanning electron microscope (SEM) photograph after the coating processing of top layer, the mouth of a river of the present invention.
Embodiment
Continous casting sprue top layer of the present invention hole sealing agent is by PbO, SiO
2, B
2o
3and H
2o forms, PbO, SiO
2, B
2o
3and H
2the weight part ratio of O is: 2:(38 ± 5): (28 ± 3): (32 ± 4); When using this hole sealing agent, adopt and to brush or hole sealing agent is coated on top layer, the mouth of a river by the mode of spraying, after drying at room temperature 2 ~ 5h, control top layer, mouth of a river hole sealing agent coat-thickness at 30 ~ 50 microns.
Below in conjunction with specific embodiment, the present invention is further detailed explanation:
Embodiment 1:
PbO, SiO in hole sealing agent
2, B
2o
3and H
2the weight part ratio of O
; Adopt spraying method to brush hole sealing agent at mouth of a river outer wall, leave standstill drying at room temperature 2h after coating evenly, coat-thickness is at 30 microns.
Embodiment 2:
PbO, SiO in hole sealing agent
2, B
2o
3and H
2the weight part ratio of O
; Adopt brushing method to brush hole sealing agent at mouth of a river outer wall, leave standstill drying at room temperature 3h after coating evenly, coat-thickness is at 40 microns.
Embodiment 3:
PbO, SiO in hole sealing agent
2, B
2o
3and H
2the weight part ratio of O
; Adopt brushing method to brush hole sealing agent at mouth of a river outer wall, leave standstill drying at room temperature 5h after coating evenly, coat-thickness is at 50 microns.
Following table is mouth of a river face coat performance test data after embodiment 1 ~ embodiment 3 sealing pores:
As can be seen from the above table, after being adopted at the mouth of a river the inventive method to carry out hole sealing agent coating processing, porosity on average reduces by 97.6%, the reduction by 38.7% of average aluminium consumption, hole and crack on effect sealing top layer, the mouth of a river, thoroughly stopping oxidizing gas enters in the mouth of a river by top layer, the mouth of a river, anti-waterstop port inwall dross and blocking, improves casting efficiency and quality product.
Claims (5)
1. continous casting sprue top layer hole sealing agent, is characterized in that: it is by PbO, SiO
2, B
2o
3and H
2o forms.
2. continous casting sprue top layer as claimed in claim 1 hole sealing agent, is characterized in that: described PbO, SiO
2, B
2o
3and H
2the weight part ratio of O is: 2:(38 ± 5): (28 ± 3): (32 ± 4).
3. the using method of the continous casting sprue top layer hole sealing agent described in any one of claim 1 or 2, is characterized in that: adopted by hole sealing agent brushing mode to be coated on top layer, the mouth of a river, drying at room temperature 2 ~ 5h after brushing.
4. the using method of the continous casting sprue top layer hole sealing agent described in any one of claim 1 or 2, is characterized in that: adopted by hole sealing agent spraying method to be coated on top layer, the mouth of a river, drying at room temperature 2 ~ 5h after spraying.
5. the using method of the continous casting sprue top layer hole sealing agent as described in claim 3 or 4, is characterized in that, top layer, described mouth of a river hole sealing agent coat-thickness controls at 30 ~ 50 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510669485.8A CN105130195A (en) | 2015-10-13 | 2015-10-13 | Continuous casting nozzle surface layer sealing agent and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510669485.8A CN105130195A (en) | 2015-10-13 | 2015-10-13 | Continuous casting nozzle surface layer sealing agent and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105130195A true CN105130195A (en) | 2015-12-09 |
Family
ID=54715845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510669485.8A Pending CN105130195A (en) | 2015-10-13 | 2015-10-13 | Continuous casting nozzle surface layer sealing agent and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105130195A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4731347A (en) * | 1986-03-21 | 1988-03-15 | Solar Turbines Incorporated | Glass frit composition |
| CN101050131A (en) * | 2007-04-04 | 2007-10-10 | 山东慧敏科技开发有限公司 | Method of filling surface blowhole to improve capabilities of refractory materials |
| CN102503135A (en) * | 2011-10-21 | 2012-06-20 | 大连理工大学 | High-temperature oxidation-proof glass-ceramic paint and preparation method thereof |
| CN103008587A (en) * | 2011-09-28 | 2013-04-03 | 宝山钢铁股份有限公司 | Generation method of anti-oxidation iron sheet by thin strip casting |
-
2015
- 2015-10-13 CN CN201510669485.8A patent/CN105130195A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4731347A (en) * | 1986-03-21 | 1988-03-15 | Solar Turbines Incorporated | Glass frit composition |
| CN101050131A (en) * | 2007-04-04 | 2007-10-10 | 山东慧敏科技开发有限公司 | Method of filling surface blowhole to improve capabilities of refractory materials |
| CN103008587A (en) * | 2011-09-28 | 2013-04-03 | 宝山钢铁股份有限公司 | Generation method of anti-oxidation iron sheet by thin strip casting |
| CN102503135A (en) * | 2011-10-21 | 2012-06-20 | 大连理工大学 | High-temperature oxidation-proof glass-ceramic paint and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李彩霞等: "连铸三大件用防氧化涂料的研制和使用", 《耐火材料》 * |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151209 |