CN105461327A - Dry tundish lining and preparation method thereof - Google Patents
Dry tundish lining and preparation method thereof Download PDFInfo
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- CN105461327A CN105461327A CN201410413261.6A CN201410413261A CN105461327A CN 105461327 A CN105461327 A CN 105461327A CN 201410413261 A CN201410413261 A CN 201410413261A CN 105461327 A CN105461327 A CN 105461327A
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- tundish
- lining
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- working lining
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Abstract
The invention relates to a dry tundish lining and a preparation method thereof. The dry tundish lining is a magnesium dry working lining, and concretely comprises 75-90wt% of magnesia, 1-5wt% of vanadine, 1-5wt% of soft clay and 5-10wt% of an organic thermoplastic compound. The magnesia, vanadine, soft clay and the organic thermoplastic compound respectively have certain quality technology indexes. The dry tundish lining is mainly suitable for continuously casting a tundish work lining, can simplifies onsite construction, reduces energy and labor consumption, can improves the strength and the slag erosion resistance of the working lining, prolongs the service life of tundish, improves the continuous casting rate, and reduces the continuous casting cost.
Description
Technical field
The present invention relates to tundish wadding and complete processing field thereof, particularly relate to a kind of dry type tundish wadding and preparation method thereof.
Background technology
Continuous casting production is last container that in steelmaking process, molten steel is detained, and the quality of liner in dundish all had a certain impact to continuous casting throwing time and billet quality.In the prior art, the working lining that continuous casting production uses mainly contains two large classes: one is heat plate absolutely, and one is coating (or spray material).Heat-insulating shield is produced complicated, and cost is high, transport difficult, in use easily causes molten steel to pollute, thus gradually replace by tundish paint.But need add a certain amount of moisture content when tundish paint uses at the scene, just can apply after fully stirring, therefore, also there is following weak point in this kind of coating:
1, owing to adding water when coating uses, reduce strength property and the anti-scour property of material, shorten the work-ing life of coating.
2, owing to adding water in coating, add the baking time of tundish, usually, coating can need be used safely through the high bake of 4-8 hour, extends the production cycle, improves cost.
3, water-borne coatings easily occurs and the adhesion of tundish permanent liner, causes and turns over bag difficulty, affect operation.
In order to overcome the above-mentioned shortcoming of coating, it is more convenient that people are seeking a kind of use, and performance is more excellent, the liner in dundish material of longer service life.Publication number is that the application for a patent for invention of CN1333098A discloses a kind of alkaline dry liner for intermediate ladle of continuous casting.Humorous working lining is at simplification site operation.Improve thermo-efficiency, improve tundish turnover rate, be all far superior to water-borne coatings.But add more boride, phosphoric acid salt and fluorochemical in the chemical constitution of this working lining, these compositions at high temperature easily generate low-melting-point material phase with principal constituent magnesium oxide, affect work-ing life.
Summary of the invention
The object of the invention is to exploitation one and both can simplify site operation, can save energy, save time, economize labor force, working lining intensity and slag resistance can be improved again, the lining material of tundish for conticasting in work-ing life can be improved.
For above-mentioned purpose, its technical scheme realized is:
A kind of dry type tundish wadding and preparation method thereof, raw material composition (wt%) of this working lining is: magnesia 75-90%, vanadine 1-5%, soft clay 1-5%, organic thermoplastic compound 5-10%.
The quality and technical index of magnesia is: Mg0>=90%, Si02<5%, Ca<l.5%, burns and loses <0.5, particle volume density >3.lOg/cm
3.
The quality and technical index of vanadine is: A1
20
3>50%, CaO+Mg0≤1.5%, Fe
20
3≤ 3.0%, particle volume density >2.6g/cm
3, water-intake rate≤5%.
The quality and technical index of soft clay is: A1
20
3>25%, Fe
20
3<5.0%, burns and loses <10%, refractoriness >1650 DEG C.
Organic thermoplastic compound is any one or any two or any two above sum in epoxy resin, resol, pitch, vibrin.The quality and technical index of above-mentioned organic thermoplastic compound is softening temperature 80 DEG C-200 DEG C.
The production method of lining material of tundish for conticasting of the present invention is as follows: first get the raw materials ready according to raw material moiety proportioning, carries out mixing afterwards and rolls, and rolls always and mixes to each component, load in packing bag.
When utilizing wadding of the present invention to make continuous casting production working lining, its constructional method is as follows:
1, the floating residue in tundish permanent layer is removed;
2, carry out ramming process to the bag end, its thickness is 40-70mm;
3, lay cylinder-packing forming mould, the spacing distance between mold and permanent layer is 90-100mm.
4, with thousand formula vibrations or ramming method shaping work lining.
Compared with prior art, tool of the present invention has the following advantages:
(1) lining material of tundish for conticasting of the present invention can improve intensity and the anti-scour property of working lining, improves work-ing life.This is not only because dry type avoids the effect of water, but also be that dry type wadding avoids too much low melting point component on the one hand and generates, advantage on the other hand adds a small amount of alumina fine powder in magnesium dry-type liner in dundish material, and this part fine powder at high temperature generates a small amount of magnesium-aluminium spinel in working lining matrix.With magnesium-aluminium spinel for the goods in conjunction with phase, not only there is higher refractoriness, higher loading soft spots, good thermal shock resistance, but also the volumetric expansion caused by magnesium-aluminium spinel generates, pore in blocking matrix, thus reach and hinder slag to permeate in working lining, improve the object of slag resistance.
2, dry materials can save mixed grind operation at the scene and directly constructs.
3, only need low-temperature bake after working lining construction, can save energy be reached, time saving and energy saving object.
4, adopt liner in dundish made by the present invention not with permanent liner adhesion, easily turn over bag, can increase work efficiency.
Embodiment
Form according to the raw material of lining material of tundish for conticasting of the present invention, prepared three batches of working linings.The raw material composition of three batches of lining material of tundish for conticastings is as shown in table l.The quality and technical index detected result of the magnesium, sand, alumina and the soft clay that adopt in three batches of waddings is as follows:
Magnesia: Mg095.5%, Si023.5%, Ca01.32%, dries mistake 0.2%, particle volume density 3.06g/cm3.
Alumina: A120375.7%, CaO+Mg00.85%, Fe
20
32.Og%, particle volume density 2.95g/cm3, water-intake rate 3.2%.
Soft clay: A1
20
342%, Fe
20
32.9%, burn mistake 9.2%, refractoriness 1720 DEG C.
Physicochemical property test is carried out to three batches of working linings be equipped with, adopts above-mentioned No. 1 prepared lining material of tundish for conticasting at three tundish vibration construction moldings, dry through coal gas and wrap to 200 DEG C and dropped into continuous casting application of RE in the steel after being incubated 2 hours.
Use result through three tundish shows, when magnesium dry-type working lining of the present invention is used for the working lining of continuous casting production, have easy disintegration, erosion rate is low, can be suitable for the advantage of Tundish Connection throwing, this is that coating cannot phase.Meanwhile, use working lining of the present invention, reduce the consumption of the steel-making continuous casting tundish energy and labor force, extend the work-ing life of tundish, the consumption of refractory materials is reduced greatly, decrease the waste of residual molten steel in tundish, rate is watered by the company of improve.In sum, the present invention is used for tundish, reduces the production cost of continuous casting significantly.
Claims (5)
1. dry type tundish wadding and preparation method thereof, is characterized in that raw material composition (wt%) of this working lining is: magnesia 75-90%, vanadine 1-5%, soft clay 1-5%, organic thermoplastic compound 5-10%.
2. the dry type tundish wadding according to claim l, it is characterized in that the quality and technical index of magnesia is: Mg0>=90%, Si02<5%, Ca<l.5%, burn and lose <0.5, particle volume density >3.lOg/cm
3.
3. dry type tundish wadding according to claim 1, is characterized in that the quality and technical index of vanadine is: A1
20
3>50%, CaO+Mg0≤1.5%, Fe
20
3≤ 3.0%, particle volume density >2.6g/cm
3, water-intake rate≤5%.
4. working lining according to claim 1, is characterized in that the quality and technical index of soft clay is: A1
20
3>25%, Fe
20
3<5.0%, burns and loses <10%, refractoriness >1650 DEG C.
5. working lining according to claim 1, it is characterized in that organic thermoplastic compound is epoxy resin, resol, pitch, any one or any two or any two above sum in vibrin, the quality and technical index of above-mentioned organic thermoplastic compound is softening temperature 80 DEG C-200 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410413261.6A CN105461327A (en) | 2014-08-21 | 2014-08-21 | Dry tundish lining and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410413261.6A CN105461327A (en) | 2014-08-21 | 2014-08-21 | Dry tundish lining and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105461327A true CN105461327A (en) | 2016-04-06 |
Family
ID=55599551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410413261.6A Pending CN105461327A (en) | 2014-08-21 | 2014-08-21 | Dry tundish lining and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105461327A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107352976A (en) * | 2017-06-28 | 2017-11-17 | 常州通和建筑工程有限公司 | A kind of continuous casting production dry working lining material |
| CN114409381A (en) * | 2022-03-28 | 2022-04-29 | 北京利尔高温材料股份有限公司 | Tundish dry material and preparation method thereof |
-
2014
- 2014-08-21 CN CN201410413261.6A patent/CN105461327A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107352976A (en) * | 2017-06-28 | 2017-11-17 | 常州通和建筑工程有限公司 | A kind of continuous casting production dry working lining material |
| CN114409381A (en) * | 2022-03-28 | 2022-04-29 | 北京利尔高温材料股份有限公司 | Tundish dry material and preparation method thereof |
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160406 |