CN1382541A - Lining material of tundish for conticasting - Google Patents
Lining material of tundish for conticasting Download PDFInfo
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- CN1382541A CN1382541A CN 02116839 CN02116839A CN1382541A CN 1382541 A CN1382541 A CN 1382541A CN 02116839 CN02116839 CN 02116839 CN 02116839 A CN02116839 A CN 02116839A CN 1382541 A CN1382541 A CN 1382541A
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- working lining
- tundish
- continuous casting
- quality
- technical index
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Abstract
A lining material of tundish for conticasting contains magnesium sand (80-95 wt.%), alumina (1-10 wt.%), soft clay (1-5 wt.%) and thermoplastic organic compound (2-15 wt.%). Its advantages are high strnegth, anticorrosion power, and high conticasting productivity.
Description
Technical field
The invention belongs to fire resisting material field, relate generally to unshape refractory.Be applicable to the lining material of pyrolytic semlting container, especially be applicable to continuous casting tundish working lining.
Background technology
The continuous casting tundish is last container that molten steel is detained in the steelmaking process, and the quality of tundish working lining all has certain influence to continuous casting throwing time and billet quality.
In the prior art, the working lining that the continuous casting tundish uses mainly contains two big classes: the one, and the exhausted plate of heat, the one, coating (or spray paint).Heat-insulating shield is produced complicated, the cost height, and the transportation difficulty in use causes molten steel to pollute, so replaced by tundish paint gradually easily.But need add a certain amount of moisture content when tundish paint uses at the scene, just can use after fully stirring, therefore, also there is following weak point in this class coating:
Add entry when 1, using, reduced the strength character and the anti-scour property of material, shortened the service life of coating owing to coating.
2, owing to add entry in the coating, increased the stoving time of tundish, usually, coating needs can use safely through 4-8 hour high-temperature baking, has prolonged the production cycle, has improved cost.
3, water paint occurs and the adhesion of tundish permanent liner easily, causes and turns over the bag difficulty, influences operation.
In order to overcome the above-mentioned shortcoming of coating, people are seeking that a kind of use is more convenient, and performance is more excellent, the tundish working lining of longer service life.Publication number is that the application for a patent for invention of CN1333098A discloses a kind of continuous casting tundish alkaline dry working lining.This working lining is being simplified site operation.Improve the thermal efficiency, improve the tundish turnover rate, all be far superior to water paint.But added more boride, phosphate and fluoride in the chemical composition of this working lining, these compositions at high temperature generate low-melting-point material mutually with principal component magnesia easily, influence service life.
Summary of the invention
The objective of the invention is to develop and a kind ofly both can simplify site operation, can save energy, save time, economize the labour, can improve working lining intensity and slag resistance again, can improve the continuous casting tundish working lining in service life.
At above-mentioned purpose, continuous casting tundish working lining of the present invention adopts the magnesium dry-type working lining.The raw material of this working lining is formed (wt%): magnesia 80-95%, vanadine 1-10%, mild-clay 1-5%, organic thermoplastic compound 2-15%.
The quality and technical index of magnesia is: MgO 〉=91%, and SiO2＜4.5%, Ca＜1.6% burns and loses＜0.3, particle volume density＞3.10g/cm
3
The quality and technical index of vanadine is: Al
2O
3＞60%, CaO+MgO≤1.0%, Fe
2O
3≤ 2.0%, particle volume density＞2.45g/cm
3, water absorption rate≤6%.
The quality and technical index of mild-clay is: Al
2O
3＞30%, Fe
2O
3＜3.0%, burn to lose＜15%, refractoriness＞1670 ℃.
Organic thermoplastic compound be in epoxy resin, phenolic resins, pitch, the mylar any or any two or any two above sums.
The production method of continuous casting tundish working lining of the present invention is as follows: at first get the raw materials ready according to raw material constituent proportioning, mix afterwards and roll, roll to each component always and mix, in the packaging bag of packing into.
When utilizing wadding of the present invention to make continuous casting tundish working lining, its construction method is as follows:
1, the unsteady residue on the removing tundish permanent layer;
2, ramming process is carried out at the bag end, its thickness is 50-80mm;
3, lay the cylinder-packing mould, the spacing distance between mold and the permanent layer is 70-80mm.
4, with dry type vibratory or ramming method shaping work lining.
Compared with prior art, the present invention has following advantage:
(1) continuous casting tundish working lining of the present invention can improve the intensity and the anti-scour property of working lining, improves service life.This is not only because dry type has been avoided the effect of water, but also be that the dry type wadding avoided too much low melting point component to generate on the one hand, advantage on the other hand is to have added a spot of alumina fine powder in magnesium dry-type tundish working lining, and this part fine powder at high temperature generates small amount of magnesium aluminate (MgO.Al in working lining matrix
2O
3).With magnesium aluminate spinel is goods in conjunction with phase, not only has higher refractoriness, higher loading soft spots, good thermal shock resistance, but also because magnesium aluminate spinel generates caused volumetric expansion, stop up pore in the matrix, in working lining, permeate, improve the purpose of slag resistance thereby reach the obstruction slag.
2, the dry type material can save the mixed grind operation at the scene and directly constructs.
3, working lining construction back only needs low-temperature bake (usually＜300 ℃ get final product), can reach energy savings, time saving and energy saving purpose.
4, the tundish working lining that adopts made of the present invention not with the permanent liner adhesion, turn over bag easily, can increase work efficiency.
Embodiment
Raw material according to continuous casting tundish working lining of the present invention is formed, and has prepared three batches of working linings.The raw material of three batches of continuous casting tundish working linings is formed as shown in table 1.The quality and technical index testing result of magnesium, sand, alumina and the mild-clay that is adopted in the three batches of waddings is as follows:
Magnesia: MgO 95.1%, SiO
22.01%, CaO 1.28%, and baking loses 0.17%, particle volume density 3.19g/cm
3
Alumina: Al
2O
383.7%, CaO+MgO 0.82%, Fe
2O
31.09%, particle volume density 2.91g/cm
3, water absorption rate 3.2%.
Mild-clay: Al
2O
332.92%, SiO2 49.95%, Fe
2O
32.82%, burn and lose 12.24%, 1710 ℃ of refractoriness.
Be equipped with good working lining to three batches and carry out the physicochemical property test, test result is as shown in table 2.
Adopt above-mentioned No. 1 prepared continuous casting tundish working lining at three tundish (A, B, C) vibrations construction molding, through coal gas baking bag to 200 ℃ and be incubated 2 hours after dropped in the continuous casting cast steel and used, its operating position sees Table 3.
Use result through three tundish A, B, C embodiment shows, when magnesium dry-type working lining of the present invention is used for the working lining of continuous casting tundish, have easy disintegration, erosion rate is low, can be suitable for the advantage of tundish continuous casting throwing, this is that coating can't phase.Simultaneously, use working lining of the present invention, reduced the steel-making continuous casting tundish energy and labour's consumption, prolonged the service life of tundish, the consumption of refractory material is reduced greatly, also reduced the waste of residual molten steel in the tundish, improved the rate of even watering.In sum, the present invention is used for tundish, reduces the production cost of continuous casting significantly.
The raw material of table 1 embodiment continuous casting tundish working lining is formed (wt%)
The physicochemical property of table 2 embodiment working lining
The operating position of table 3 embodiment tundish
| Lot number | Chemical composition | Physical property | |||||||
| ??MgO％ | Al 2O 3％ | ??SiO 2％ | 200℃×3h | ?1500℃×3h | |||||
| Bulk density g/cm 3 | Compressive resistance MPa | Rupture strength MPa | Bulk density g/cm 3 | Compressive resistance MPa | Rupture strength MPa | ||||
| ???1 | ????81.76 | ?4.82 | ????2.56 | ????2.62 | ????46.65 | ????8.53 | ????2.65 | ????84.65 | ????14.96 |
| ???2 | ????82.05 | ?3.51 | ????2.60 | ????2.61 | ????34.92 | ????6.87 | ????2.64 | ????79.97 | ????13.01 |
| ???3 | ????79.88 | ?5.94 | ????3.02 | ????2.54 | ????32.49 | ????6.82 | ????2.60 | ????62.38 | ????11.43 |
| The tundish numbering | The capacity t of bag | Bag base thickness degree mm | The sidewall thickness mm of bag | Continuous throwing stove number | The continuous throwing time | Slag line loss late mm/min | Inactive reason |
| A | ?12 | ?55 | ?80 | ?6 | ?327 | ?0.0008 | Stopper is disconnected |
| B | ?12 | ?55 | ?75 | ?13 | ?384 | ?0.001 | Mouth of a river base |
| C | ?20 | ?80 | ?80 | ?27 | ?1224 | ?0.009 | Mouth of a river base |
Claims (5)
1, a kind of continuous casting tundish working lining is characterized in that the raw material composition (wt%) of this working lining is: magnesia 80-95%, vanadine 1-10%, mild-clay 1-5%, organic thermoplastic compound 2-15%.
2, working lining according to claim 1 is characterized in that the quality and technical index of magnesia is: MgO 〉=91%, and SiO2＜4.5%, Ca＜1.6% burns and loses＜0.3, particle volume density＞3.10g/cm
3
3, working lining according to claim 1 is characterized in that the quality and technical index of vanadine is: Al
2O
3＞60%, CaO+MgO≤1.0%, Fe
2O
3≤ 2.0%, particle volume density＞2.45g/cm
3, water absorption rate≤6%.
4, working lining according to claim 1 is characterized in that the quality and technical index of mild-clay is: Al
2O
3＞30%, Fe
2O
3＜3.0%, burn to lose＜15%, refractoriness＞1670 ℃.
5, working lining according to claim 1, it is characterized in that organic thermoplastic compound in the epoxy resin, phenolic resins, pitch, mylar any or any two or any two above sums.Above-mentioned organic thermoplastic compound's quality and technical index is 65 ℃-180 ℃ of softening points.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021168393A CN1179807C (en) | 2002-04-12 | 2002-04-12 | Lining material of tundish for conticasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021168393A CN1179807C (en) | 2002-04-12 | 2002-04-12 | Lining material of tundish for conticasting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1382541A true CN1382541A (en) | 2002-12-04 |
| CN1179807C CN1179807C (en) | 2004-12-15 |
Family
ID=4744260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021168393A Expired - Fee Related CN1179807C (en) | 2002-04-12 | 2002-04-12 | Lining material of tundish for conticasting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1179807C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462884B (en) * | 2008-12-31 | 2011-08-17 | 海城市中兴镁质合成材料有限公司 | Ramming material for ladle permanent lining and production method thereof |
| CN102372488A (en) * | 2010-07-20 | 2012-03-14 | 日本碍子株式会社 | Amorphous refractory object for heat treating furnace and lining structure of the furnace |
| CN101717265B (en) * | 2009-11-23 | 2012-05-23 | 海城市中兴镁质合成材料有限公司 | Anti-penetration tundish dry liner |
| CN101486584B (en) * | 2009-02-12 | 2012-05-30 | 武汉振海科技有限公司 | Method for using red mud as ladle or tundish covering agent |
| CN103508739A (en) * | 2012-06-20 | 2014-01-15 | 鞍钢股份有限公司 | Low cost dolomite continuous casting tundish coating |
| CN115246733A (en) * | 2021-04-28 | 2022-10-28 | 宝山钢铁股份有限公司 | High-durability tundish coating and application thereof |
-
2002
- 2002-04-12 CN CNB021168393A patent/CN1179807C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462884B (en) * | 2008-12-31 | 2011-08-17 | 海城市中兴镁质合成材料有限公司 | Ramming material for ladle permanent lining and production method thereof |
| CN101486584B (en) * | 2009-02-12 | 2012-05-30 | 武汉振海科技有限公司 | Method for using red mud as ladle or tundish covering agent |
| CN101717265B (en) * | 2009-11-23 | 2012-05-23 | 海城市中兴镁质合成材料有限公司 | Anti-penetration tundish dry liner |
| CN102372488A (en) * | 2010-07-20 | 2012-03-14 | 日本碍子株式会社 | Amorphous refractory object for heat treating furnace and lining structure of the furnace |
| CN102372488B (en) * | 2010-07-20 | 2014-10-15 | 日本碍子株式会社 | Amorphous refractory object for heat treating furnace and lining structure of the furnace |
| CN103508739A (en) * | 2012-06-20 | 2014-01-15 | 鞍钢股份有限公司 | Low cost dolomite continuous casting tundish coating |
| CN115246733A (en) * | 2021-04-28 | 2022-10-28 | 宝山钢铁股份有限公司 | High-durability tundish coating and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1179807C (en) | 2004-12-15 |
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