CN102451906A - Steelmaking continuous casting magnesium-zirconium tundish coating - Google Patents
Steelmaking continuous casting magnesium-zirconium tundish coating Download PDFInfo
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- CN102451906A CN102451906A CN2010105182864A CN201010518286A CN102451906A CN 102451906 A CN102451906 A CN 102451906A CN 2010105182864 A CN2010105182864 A CN 2010105182864A CN 201010518286 A CN201010518286 A CN 201010518286A CN 102451906 A CN102451906 A CN 102451906A
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Abstract
The invention discloses a high-temperature-resistant refractory coating, in particular to a steelmaking continuous casting magnesium-zirconium tundish coating, which is mainly used for solving the technical problems of high cost and difficulty in stripping after use existing in the conventional tundish coating. The technical scheme of the invention is that: the steelmaking continuous casting magnesium-zirconium tundish coating consists of the following raw materials in percentage by weight: 69-79 percent of magnesia, 11-25 percent of zirconite, 1-5 percent of silicon powder, 1-5 percent of sodium tripolyphosphate, 1-5 percent of solid water glass, 0.1-1 percent of paper fiber and 0.3-1 percent of bentonite. Due to the adoption of the steelmaking continuous casting magnesium-zirconium tundish coating, a coating layer can be automatically separated from a refractory material layer during clearing of a tundish after pouring of molten steel is completed within a specified number of pouring furnaces, so that a coating layer can be remade on the surface of the refractory material layer for next molten steel pouring.
Description
Technical field: type of the present invention relates to a kind of high temperature resistant fireproof coating, particularly a kind of steel-making continuous casting magnesium zirconium matter tundish paint.
Background technology: continuous casting tundish cylinder-packing is made up of involucrum, refractory masses and coating, and wherein coating directly contacts molten steel.After the pouring furnace number of regulation finished pouring molten steel, during the cleaning tundish, dope layer was wanted to break away from refractory masses automatically, so that make dope layer again at the refractory material laminar surface, waited for next pour steel usefulness.Therefore, in continuous casting is produced, be to the requirement of tundish paint: the high-temperature molten steel effect under and in baking the time, do not ftractureing, do not collapsing, and synchronous service life with tundish, when clearing up, can break away from automatically.At present the ubiquitous problem of tundish paint is to use the life-span short, under baking or high-temperature molten steel effect, ftractures or collapses.Thereby be compelled to stop pour steel, bring negative effect to production.Therefore the performance of improving tundish paint is a direction of research tundish paint, and one of the development trend of tundish paint is exactly that service life and tundish are synchronous.
Magnesia in the tundish paint (magnesia) aggregate is one of indispensable composition, plays a role not enough but depend it alone, often is used in combination with other aggregate, can improve the function and the performance of tundish paint.Therefore, research institution and personnel study the bond material of magnesia both at home and abroad, to improve the performance of coating.Mainly containing magnesium through the existing tundish paint patent of retrieval, calcareous (aggregate that is coating is made up of magnesia and calcium oxide; As asking 03115605.3 in the Chinese patent), the patent of magnesium chromium matter (aggregate that is coating is made up of magnesia and chrome ore, like one Chinese patent application 90105890.4), white olivine (like one Chinese patent application 200910061293.3) and magnesia coating (like Chinese patent 00111452.2).But the resistant bad temper of these kinds is not enough, and coating and tundish refractory masses are difficult for breaking away from; The serviceability that has is poor, cracking under the high-temperature molten steel effect and finishes in advance to pour into a mould.More approaching CN96115590.6 (light Magnesia-zirconia spray material) relates to magnesium zirconium matter coating.But the zirconium matter that it adopts is zirconia, and cost is higher.
Summary of the invention:
The present invention provides that a kind of cost is lower, the good steel-making continuous casting magnesium zirconium matter tundish paint of spalling behind the Heat stability is good, use.Mainly solve the technical problem that to peel off after existing tundish paint cost height, the use.
Technical scheme of the present invention is: a kind of steel-making continuous casting magnesium zirconium matter tundish paint; The percentage by weight of its raw material constituent is: magnesia 69%-79%, zircon 11%-25%, silicon powder 1%-5%; Sodium phosphate trimer 1%-5%; Solid water glass 1%-5%, paper fiber 0.1%-1%, bentonite 0.3%-1%.
The prescription reason of technical scheme of the present invention: the magnesia in the tundish paint is aggregate, belongs to main component, if its content is less than lower limit, and its skeleton weak effect in coating then, refractoriness is low, receives the molten steel erosiveness poor.If be higher than higher limit, then the effect of other composition is not obvious, can not resolve cracking and problem such as defeated and dispersed, and through test, discovery magnesia content is advisable at 69%-79%.
In the prescription of this coating, if zircon content is less than 11%, then its high temperature resistant property is poor, can not resolve the cracking problem.If its content is higher than 25%, then owing to contain silica (acidity) in the zircon, can and magnesia (alkalescence) reaction, reduce refractoriness, and be unfavorable for coating defeated and dispersed after using.Test discovery zircon content is advisable at 11%-25%.Other one-tenth in this coating belongs to binding agent and helps zircon to play the additive (like silicon powder and paper fiber) of crack effect, and its composition can not be too high.
In addition, in this formula range, preferred value is: magnesia 74%, zircon 20%, silicon powder 2.5%, sodium phosphate trimer 1.5%, solid water glass 1.0%, paper fiber 0.3%, bentonite 0.7%.
Beneficial effect of the present invention is: with the performance of existing tundish paint, tundish paint refractoriness of the present invention is high, and elevated temperature strength is high, under the high-temperature molten steel effect, does not melt, and does not cave in, and corrosion resistance is strong.Reheating linear change rate on reheating is low, and its good stability at high temperature is described, does not expand, and the cracking problem does not take place, and has solved cracking problem under baking or high-temperature molten steel effect.Therefore this tundish paint has the corrosion function of opposing molten steel, Heat stability is good, does not ftracture, the life-span long (can with same life-span of tundish), uses advantages such as the back spalling is good.The present invention selects zircon for use; Compare with zirconia, its advantage is that cost is than zirconia much lower (6.5 ten thousand yuan/ton of zirconia prices, about 5,000 yuan/ton of zircons); In addition; Find also that under study for action zircon has such effect in tundish paint: use the molten steel stove number reach regulation at tundish paint after, when cleaning, it can make coating peel off the tundish parent layer of anti-the material automatically, is convenient to artificially on the tundish parent layer of anti-the material, apply coating material; Be used for casting next time molten steel, save labor cleaning's trouble.And with zirconia as component, then do not have this characteristic.Therefore, zircon be used for tundish paint aggregate, form magnesium zirconium matter tundish paint, will be a new range of tundish paint kind, the creationary embodiment of this patent of invention that Here it is.
The specific embodiment:
In batch mixer, do mixing to magnesia, zircon, silicon powder, sodium phosphate trimer, solid water glass, paper fiber and bentonite in table 1 ratio; After mixing, add about 10% water, carry out wet mixing; Spread upon the surface of tundish refractory masses behind the mixing, thickness is at 5-20mm.
Table 1: embodiment 1-5 material composition is formed (percentage by weight %) as follows:
The performance of the magnesium zirconium matter tundish paint performance that is obtained is seen table 2.
Table 2. magnesium zirconium matter tundish paint performance
Claims (2)
1. steel-making continuous casting magnesium zirconium matter tundish paint, the percentage by weight of its raw material constituent is: magnesia 69-79%, zircon 11-25%; Silicon powder 1-5%, sodium phosphate trimer 1-5%, solid water glass 1-5%; Paper fiber 0.1-1%, bentonite 0.3-1%.
2. according to the described a kind of steel-making continuous casting magnesium zirconium matter tundish paint of claim, it is characterized in that: the percentage by weight of its raw material constituent is: magnesia 74%, zircon 20%; Silicon powder 2.5%, sodium phosphate trimer 1.5%, solid water glass 1.0%; Paper fiber 0.3%, bentonite 0.7%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105182864A CN102451906A (en) | 2010-10-22 | 2010-10-22 | Steelmaking continuous casting magnesium-zirconium tundish coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105182864A CN102451906A (en) | 2010-10-22 | 2010-10-22 | Steelmaking continuous casting magnesium-zirconium tundish coating |
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| CN102451906A true CN102451906A (en) | 2012-05-16 |
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| CN2010105182864A Pending CN102451906A (en) | 2010-10-22 | 2010-10-22 | Steelmaking continuous casting magnesium-zirconium tundish coating |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731127A (en) * | 2012-07-25 | 2012-10-17 | 大石桥市东兴耐火材料有限公司 | Manufacture technology of electrically molten magnesium-zirconium eutectic crystal material |
| CN103833394A (en) * | 2014-01-08 | 2014-06-04 | 长兴明晟冶金炉料有限公司 | Tundish coating |
| CN107999732A (en) * | 2017-11-07 | 2018-05-08 | 河钢股份有限公司承德分公司 | Ultra-low carbon coating tundish builds by laying method |
| CN112552027A (en) * | 2021-02-24 | 2021-03-26 | 北京利尔高温材料股份有限公司 | Carbon-free magnesium composite sealing brick for VOD steel ladle and preparation method thereof |
| CN114836062A (en) * | 2022-05-11 | 2022-08-02 | 上海利尔耐火材料有限公司 | Magnesium phosphate-free coating for tundish |
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| US4696455A (en) * | 1984-10-30 | 1987-09-29 | Consolidated Ceramic Products, Inc. | Zircon and MgO preheatable insulating refractory liners and methods of use thereof |
| CN1320577A (en) * | 2001-02-26 | 2001-11-07 | 宝山钢铁股份有限公司 | Magnesium paint for tundish for conticasting |
| CN101229583A (en) * | 2008-01-17 | 2008-07-30 | 武汉科技大学 | Pouring box magnesium-base coating |
| CN101342587A (en) * | 2007-07-11 | 2009-01-14 | 刘杰 | Continuous casting pouring box spray paint |
| CN102134164A (en) * | 2010-01-21 | 2011-07-27 | 宜兴市国强炉业有限公司 | High-temperature wear-resistant repairing coating and preparation method thereof |
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2010
- 2010-10-22 CN CN2010105182864A patent/CN102451906A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4696455A (en) * | 1984-10-30 | 1987-09-29 | Consolidated Ceramic Products, Inc. | Zircon and MgO preheatable insulating refractory liners and methods of use thereof |
| CN1320577A (en) * | 2001-02-26 | 2001-11-07 | 宝山钢铁股份有限公司 | Magnesium paint for tundish for conticasting |
| CN101342587A (en) * | 2007-07-11 | 2009-01-14 | 刘杰 | Continuous casting pouring box spray paint |
| CN101229583A (en) * | 2008-01-17 | 2008-07-30 | 武汉科技大学 | Pouring box magnesium-base coating |
| CN102134164A (en) * | 2010-01-21 | 2011-07-27 | 宜兴市国强炉业有限公司 | High-temperature wear-resistant repairing coating and preparation method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731127A (en) * | 2012-07-25 | 2012-10-17 | 大石桥市东兴耐火材料有限公司 | Manufacture technology of electrically molten magnesium-zirconium eutectic crystal material |
| CN103833394A (en) * | 2014-01-08 | 2014-06-04 | 长兴明晟冶金炉料有限公司 | Tundish coating |
| CN103833394B (en) * | 2014-01-08 | 2015-09-09 | 长兴明晟冶金炉料有限公司 | Tundish paint |
| CN107999732A (en) * | 2017-11-07 | 2018-05-08 | 河钢股份有限公司承德分公司 | Ultra-low carbon coating tundish builds by laying method |
| CN107999732B (en) * | 2017-11-07 | 2019-10-18 | 河钢股份有限公司承德分公司 | Ultra-low carbon coating tundish builds by laying method |
| CN112552027A (en) * | 2021-02-24 | 2021-03-26 | 北京利尔高温材料股份有限公司 | Carbon-free magnesium composite sealing brick for VOD steel ladle and preparation method thereof |
| CN114836062A (en) * | 2022-05-11 | 2022-08-02 | 上海利尔耐火材料有限公司 | Magnesium phosphate-free coating for tundish |
| CN114836062B (en) * | 2022-05-11 | 2024-04-16 | 上海利尔耐火材料有限公司 | Tundish magnesia phosphorus-free coating |
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Application publication date: 20120516 |