CN104119084B - Continuous casting steel machine liner in dundish coating - Google Patents
Continuous casting steel machine liner in dundish coating Download PDFInfo
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- CN104119084B CN104119084B CN201410311960.XA CN201410311960A CN104119084B CN 104119084 B CN104119084 B CN 104119084B CN 201410311960 A CN201410311960 A CN 201410311960A CN 104119084 B CN104119084 B CN 104119084B
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Abstract
The invention discloses a kind of continuous casting steel machine liner in dundish coating, it is characterized in that: it is grouped into by the one-tenth of following weight per-cent: forsterite grog 49.5 ~ 80%; Highly-purity magnesite 16 ~ 40%; Sodium hexametaphosphate 99 0.8 ~ 3.5%; Carboxymethyl cellulose 0.1 ~ 1.5%; Lime 0.3 ~ 1.0%; Polypropylene/ethylene fiber 0.05 ~ 0.5%; Paper fiber 0.5 ~ 2.0%; Silicon powder 0.5 ~ 2.0%.Continuous casting steel machine liner in dundish coating thermal conductivity of the present invention is low, and can reduce molten steel temperature drop, economic environmental protection, automatic disintegration performance is good, has good workability, long service life, and this coating continuous casting time is more than 18 hours.
Description
Technical field
The present invention relates to steelmaking technical field, particularly a kind of continuous casting steel machine liner in dundish coating.
Background technology
Tundish is last container in process for making, main stabilization molten steel flow, goes the effect that is mingled with, shunts and ensures that molten steel continuous casting continues to flow.Current most domestic liner in dundish coating uses magnesia raw material to prepare, and magnesia Mineral resources are less, magnesia raw material's growing tension, adopt other raw materials replacement magnesia raw material to prepare liner in dundish coating imperative.
In recent years, the situation is tense for domestic steel industry, and product restructuring is devoted in Large Steel ironworks, and variety steel added value is high, profitable, and variety steel output promotes greatly, and this is just to proposing new requirement the work-ing life of iron and steel smelting refractory materials.
Some producers adopt rhombspar and useless magnesia chrome brick as main material production liner in dundish coating (CN103508739A), but the easy aquation of rhombspar also produces comparatively large vol expansion, the volume stability of coating is bad, and high valence chrome is harmful.The price low and high temperature performance of forsterite is good, and part producer have employed forsterite raw material and prepares tundish paint (CN101508586B), and even the time of watering reaches 16 hours, but this can not meet the requirement of iron and steel producer.Some employing forsterite sands (20-50wt%), forsterite grog (25-55wt%) are mainly prepare liner in dundish coating, add-on≤55% of forsterite grog, the advantage of forsterite grog can not be given full play to, and without the explanation in concrete work-ing life.
Existing magnesia liner in dundish coating main raw material is magnesia, and particle volume density is comparatively large, easily occurs the phenomenon of expecting that collapses when smearing construction; Thermal conductivity is high, easily increases the temperature drop of molten steel, causes working lining and permanent layer excess agglomeration, and working lining disintegrates poor performance automatically.Further, existing white olivine liner in dundish coating is mainly based on forsterite raw material, and even the time of watering is no more than 16 hours.
Summary of the invention
In order to solve the problem, the object of this invention is to provide the continuous casting steel machine liner in dundish coating of a kind of long service life, good, the economic environment-friendly type of low, the automatic disintegration performance of thermal conductivity.
For achieving the above object, continuous casting steel machine liner in dundish coating provided by the present invention, is characterized in that: it is grouped into by the one-tenth of following weight per-cent: forsterite grog 49.5 ~ 80%; Highly-purity magnesite 16 ~ 40%; Sodium hexametaphosphate 99 0.8 ~ 3.5%; Carboxymethyl cellulose 0.1 ~ 1.5%; Lime 0.3 ~ 1.0%; Polypropylene/ethylene fiber 0.05 ~ 0.5%; Paper fiber 0.5 ~ 2.0%; Silicon powder 0.5 ~ 2.0%.
Preferably, it is grouped into by the one-tenth of following weight per-cent: forsterite grog 57 ~ 80%; Highly-purity magnesite 36 ~ 40%; Sodium hexametaphosphate 99 1 ~ 2%; Carboxymethyl cellulose 0.2 ~ 0.65%; Lime 0.5 ~ 0.8%; Polypropylene/ethylene fiber 0.2 ~ 0.5%; Paper fiber 0.4 ~ 0.9%; Silicon powder 0.8 ~ 1.0%.
As another preferred version, it is grouped into by the one-tenth of following weight per-cent: forsterite grog 60%; Highly-purity magnesite 36%; Sodium hexametaphosphate 99 1.5%; Carboxymethyl cellulose 0.2%; Lime 0.5%; Polypropylene/ethylene fiber 0.2%; Paper fiber 0.8%; Silicon powder 0.8%.
Further, MgO mass percentage >=41% of described forsterite grog, granularity≤the 3mm of forsterite grog, wherein: the forsterite grog that the forsterite grog of 1mm < granularity < 3mm accounts for 40 ~ 70%, 0.088mm < granularity < 1mm of forsterite grog total mass accounts for 30 ~ 40% of forsterite grog total mass; MgO mass percentage >=98% of described highly-purity magnesite, the granularity≤1mm of highly-purity magnesite, wherein: the highly-purity magnesite of 0.088mm < granularity < 1mm accounts for 30 ~ 70% of highly-purity magnesite total mass.
The main raw material that the present invention adopts is forsterite grog and highly-purity magnesite, and aggregate fraction easy forsterite grog is main, and add-on is 57 ~ 80%; Base portion, based on highly-purity magnesite, meets service requirements completely by this coating property of innovation of technology, and even the time of watering reaches 18-20 hour.
The invention has the advantages that: continuous casting steel machine liner in dundish coating thermal conductivity of the present invention is low, and can reduce molten steel temperature drop, economic environmental protection, automatic disintegration performance is good, has good workability, long service life, and this coating continuous casting time is more than 18 hours.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
Embodiment one:
Continuous casting steel machine liner in dundish coating of the present invention, it is grouped into by the one-tenth of following weight per-cent:
MgO mass percentage >=41% of forsterite grog, granularity≤the 3mm of forsterite grog, wherein: the forsterite grog that the forsterite grog of 1mm < granularity < 3mm accounts for 70%, 0.088mm < granularity < 1mm of forsterite grog total mass accounts for 30% of forsterite grog total mass; MgO mass percentage >=98% of described highly-purity magnesite, the granularity≤1mm of highly-purity magnesite, wherein: the highly-purity magnesite of 0.088mm < granularity < 1mm accounts for 30% of highly-purity magnesite total mass.
The content of the granularity and MgO that control forsterite grog can ensure the workability of coating, normal temperature/middle temperature physicals and the scour resistance to molten steel; The control granularity of highly-purity magnesite and the content of MgO can strengthen high-temperature behavior and the anti-scour property of coating.
Add Sodium hexametaphosphate 99, carboxymethyl cellulose, silicon powder can ensure that coating has certain viscosity and middle low temperature intensity; Add polypropylene/ethylene fiber, paper fiber can make the present invention not burst in bake process, add lime and the present invention can be made can to become dry within the regular hour after smearing, have intensity, reduce the seasoning time.Adopt this composite additive can also improve smear of the present invention, make it easy to apply and not easily collapse under construction temperature condition, can also ensure can automatically disintegrate after watering steel simultaneously, and non-caked permanent layer, do not cause destruction to permanent layer.
During preparation, by above-mentioned raw materials stirring and evenly mixing.During use, add the water of about 25% in coating, be applied on liner in dundish after mixing, liner in dundish coating of the present invention can use 20 hours continuously.
Embodiment two:
Continuous casting steel machine liner in dundish coating of the present invention, it is grouped into by the one-tenth of following weight per-cent:
MgO mass percentage >=41% of forsterite grog, granularity≤the 3mm of forsterite grog, wherein: the forsterite grog that the forsterite grog of 1mm < granularity < 3mm accounts for 40%, 0.088mm < granularity < 1mm of forsterite grog total mass accounts for 40% of forsterite grog total mass; MgO mass percentage >=98% of described highly-purity magnesite, the granularity≤1mm of highly-purity magnesite, wherein: the highly-purity magnesite of 0.088mm < granularity < 1mm accounts for 70% of highly-purity magnesite total mass.
Preparation of the present invention and using method are with embodiment one, and liner in dundish coating of the present invention can use 19 hours continuously.
Embodiment three:
Continuous casting steel machine liner in dundish coating of the present invention, it is grouped into by the one-tenth of following weight per-cent:
MgO mass percentage >=41% of forsterite grog, granularity≤the 3mm of forsterite grog, wherein: the forsterite grog that the forsterite grog of 1mm < granularity < 3mm accounts for 60%, 0.088mm < granularity < 1mm of forsterite grog total mass accounts for 30% of forsterite grog total mass; MgO mass percentage >=98% of described highly-purity magnesite, the granularity≤1mm of height ~ pure magnesia, wherein: the highly-purity magnesite of 0.088mm < granularity < 1mm accounts for 30% of highly-purity magnesite total mass.
Preparation of the present invention and using method are with embodiment one, and liner in dundish coating of the present invention can use 18 hours continuously.
Embodiment four:
Continuous casting steel machine liner in dundish coating of the present invention, it is grouped into by the one-tenth of following weight per-cent:
MgO mass percentage >=41% of forsterite grog, granularity≤the 3mm of forsterite grog, wherein: the forsterite grog that the forsterite grog of 1mm < granularity < 3mm accounts for 60%, 0.088mm < granularity < 1mm of forsterite grog total mass accounts for 30% of forsterite grog total mass; MgO mass percentage >=98% of described highly-purity magnesite, the granularity≤1mm of height ~ pure magnesia, wherein: the highly-purity magnesite of 0.088mm < granularity < 1mm accounts for 30% of highly-purity magnesite total mass.
Preparation of the present invention and using method are with embodiment one, and liner in dundish coating of the present invention can use 19 hours continuously.
Embodiment five:
Continuous casting steel machine liner in dundish coating of the present invention, it is grouped into by the one-tenth of following weight per-cent:
MgO mass percentage >=41% of forsterite grog, granularity≤the 3mm of forsterite grog, wherein: the forsterite grog that the forsterite grog of 1mm < granularity < 3mm accounts for 60%, 0.088mm < granularity < 1mm of forsterite grog total mass accounts for 30% of forsterite grog total mass; MgO mass percentage >=98% of described highly-purity magnesite, the granularity≤1mm of height ~ pure magnesia, wherein: the highly-purity magnesite of 0.088mm < granularity < 1mm accounts for 30% of highly-purity magnesite total mass.
Preparation of the present invention and using method are with embodiment one, and liner in dundish coating of the present invention can use 20 hours continuously.
Claims (2)
1. a continuous casting steel machine liner in dundish coating, is characterized in that: it is grouped into by the one-tenth of following weight per-cent: forsterite grog 60%; Highly-purity magnesite 36%; Sodium hexametaphosphate 99 1.5%; Carboxymethyl cellulose 0.2%; Lime 0.5%; Polypropylene/ethylene fiber 0.2%; Paper fiber 0.8%; Silicon powder 0.8%.
2. continuous casting steel machine liner in dundish coating according to claim 1, it is characterized in that: MgO mass percentage >=41% of described forsterite grog, granularity≤the 3mm of forsterite grog, wherein: the forsterite grog that the forsterite grog of 1mm < granularity < 3mm accounts for 40 ~ 70%, 0.088mm < granularity < 1mm of forsterite grog total mass accounts for 30 ~ 40% of forsterite grog total mass; MgO mass percentage >=98% of described highly-purity magnesite, the granularity≤1mm of highly-purity magnesite, wherein: the highly-purity magnesite of 0.088mm < granularity < 1mm accounts for 30 ~ 70% of highly-purity magnesite total mass.
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| CN201410311960.XA CN104119084B (en) | 2014-07-02 | 2014-07-02 | Continuous casting steel machine liner in dundish coating |
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| CN104119084B true CN104119084B (en) | 2016-04-20 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105130453B (en) * | 2015-07-07 | 2018-08-14 | 武汉钢铁集团耐火材料有限责任公司 | A kind of coating |
| CN107235737A (en) * | 2017-06-30 | 2017-10-10 | 长兴泓矿炉料有限公司 | A kind of forsterite fireproof coating and preparation method thereof |
| CN107903051B (en) * | 2017-12-05 | 2021-04-09 | 河南工程学院 | Forsterite-eucryptite composite ceramic material with near-zero expansion coefficient |
| CN111004025A (en) * | 2019-12-14 | 2020-04-14 | 青岛尊龙耐火材料有限公司 | Component of slag adhering resisting coating for ladle lining and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508586A (en) * | 2009-03-27 | 2009-08-19 | 武汉钢铁(集团)公司 | Paint for continuous casting pouring box work liner and preparing technique thereof |
| CN103551496A (en) * | 2013-10-29 | 2014-02-05 | 新疆华莎能源股份有限公司 | Anhydrous water-based boltonite powdery coating |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101508586A (en) * | 2009-03-27 | 2009-08-19 | 武汉钢铁(集团)公司 | Paint for continuous casting pouring box work liner and preparing technique thereof |
| CN103551496A (en) * | 2013-10-29 | 2014-02-05 | 新疆华莎能源股份有限公司 | Anhydrous water-based boltonite powdery coating |
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Effective date of registration: 20180420 Address after: No. 1, Qingshan District, Hubei Province, Wuhan City, Hubei Patentee after: Wuhan Iron & Steel (Group) Corp. Address before: 430080 Wuchang, Hubei Friendship Road, No. A, block, floor 999, 15 Patentee before: Wuhan Iron & Steel (Group) Corp. |
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