CN101386543A - Continuous casting tundish magnesia coating - Google Patents
Continuous casting tundish magnesia coating Download PDFInfo
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- CN101386543A CN101386543A CNA2008101973258A CN200810197325A CN101386543A CN 101386543 A CN101386543 A CN 101386543A CN A2008101973258 A CNA2008101973258 A CN A2008101973258A CN 200810197325 A CN200810197325 A CN 200810197325A CN 101386543 A CN101386543 A CN 101386543A
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Abstract
The invention provides two proposals for a continuous casting tundish magnesia coating. In the first proposal, the magnesia coating consists of the following raw materials in weight percentage: 85 to 95 percent of intermediate-range magnesia, 2 to 6 percent of soft clay, 2 to 6 percent of sodium hexametahposphate, 0.4 to 2.5 percent of active lime powder, 0.4 to 0.8 percent of paper fiber and 0.1 to 0.2 percent of explosion-proof fiber. In the second proposal, the magnesia coating consists of the following raw materials in weight percentage: 85 to 94 percent of intermediate-range magnesia, 2 to 6 percent of soft clay, 2 to 6 percent of sodium hexametahposphate, 0.5 to 2.5 percent of active lime powder, 1 to 1.5 percent of aluminum silicate fiber and 0.1 to 0.2 percent of explosion-proof fiber. The two proposals of the invention both adopt the soft clay and the sodium hexametahposphateas as bonding agents so as to adapt to the low-carbon or carbon-free tundish coating. Low carbon content or no carbon in the coating can ensure steel pouring quality, improve the finished product rate of steel, improve the erosion resistance and permeability of tundish simultaneously, and provide reliable guarantee for smooth production.
Description
Technical field
The present invention relates to a kind of low-carbon (LC) and carbon-free tundish paint, specifically a kind of refractory paint that is used for continuous casting tundish working lining belongs to the amorphous refractory field.
Background technology
Along with the develop rapidly of modern steel-making continuous casting technology, the quality and the smelting technology of continuous casting steel billet improve gradually, and the continuous casting level obtains significant progress, and present many steel mills have begun to adopt tundish dry material as working lining.In order to improve the work-ing life of tundish, reduce cost, reduce casualty ratio of accidents, also more and more higher for continuous casting with the requirement of tundish paint.
At present, the working lining of continuous casting tundish mainly adopts magnesia coating, wherein, is main raw material with middle-grade magnesia, is wedding agent with silicon powder or poly-phosphate, and the paper fiber with 1.5 ~ 2.0% and certain thing that adds are made.During construction, the surplus temperature of tundish requires 60 ~ 80 ℃, adds 28 ~ 30% water in the siccative and stirs, and begins to smear construction after stirring, and construction finishes and toasted in 2 hours; Carry out continuous-casting steel pouring then, connect and to water 10 ~ 15 stoves, water steel finish treat residual molten steel cools after, turn over bag; The practical effect of above-mentioned magnesia coating is good.In actual applications, owing to the paper fiber that adds 1.5 ~ 2% in the coating, therefore, the smear layer void content is higher, and anti-permeability performance is poor; Particularly at slag lining, the infiltration of slag, corrode especially severe, thereby cause working lining and permanent layer sintering, cause tundish to turn over bag automatically, bring certain difficulty to organization of production; In addition, because the paper fiber contains a certain amount of carbon, can cause the backflow of carbon in steel pouring process, this quality to steel has very big side effect; Particularly the quality of becoming a useful person to silicon steel has very large influence.
As everyone knows, the carbon content problem of higher need reduce the wherein content of paper fiber in the existing magnesia coating of solution, and still, the viscosity of slip is lower behind the content of reduction paper fiber, and then has brought the problem of the poor adhesion between working lining and the permanent layer.
In view of this, demand developing a kind of reliable low-carbon (LC) or carbon-free working lining refractory paint used urgently.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of continuous casting tundish magnesia coating, to overcome the existing existing above-mentioned defective of magnesia coating.
To achieve these goals, the invention provides two kinds of solutions, they all adopt soft clay and Sodium hexametaphosphate 99 as wedding agent.Concrete scheme is as follows:
A kind of continuous casting tundish magnesia coating provided by the invention is made up of following raw materials by weight: middle-grade magnesia 85 ~ 95%; Soft clay 2 ~ 6%; Sodium hexametaphosphate 99 2 ~ 6%; Active lime powder 0.4 ~ 2.5%; Paper fiber 0.4 ~ 0.8%; With explosion-proof fiber 0.1 ~ 0.2%.
Preferably, form by following raw materials by weight: middle-grade magnesia 85%; Soft clay 5.8%; Sodium hexametaphosphate 99 5.8%; Active lime powder 2.5%; Paper fiber 0.8%; With explosion-proof fiber 0.1%.
Preferably, form by following raw materials by weight: middle-grade magnesia 90%; Soft clay 4%; Sodium hexametaphosphate 99 4%; Active lime powder 1.5%; Paper fiber 0.4%; With explosion-proof fiber 0.1%.
Preferably, form by following raw materials by weight: middle-grade magnesia 94.7%; Soft clay 2%; Sodium hexametaphosphate 99 2%; Active lime powder 0.4%; Paper fiber 0.7%; With explosion-proof fiber 0.2%.
Preferably, described middle-grade magnesia is by 3 ~ 1mm, 1 ~ 0.5mm, and four gratings of 0.5 ~ 0.088mm and 180 orders constitute, and weight percent is respectively: 30 ~ 35%, 15 ~ 20%, 10 ~ 20% and 30 ~ 35%.
Above-mentioned continuous casting tundish magnesia coating is the low-carbon (LC) tundish paint.
Another kind of continuous casting tundish magnesia coating provided by the invention is made up of following raw materials by weight: middle-grade magnesia 85 ~ 94%; Soft clay 2 ~ 6%; Sodium hexametaphosphate 99 2 ~ 6%; Active lime powder 0.5 ~ 2.5%; Aluminum silicate fiber 1 ~ 1.5%; With explosion-proof fiber 0.1 ~ 0.2%.
Preferably, form by following raw materials by weight: middle-grade magnesia 85%; Soft clay 5.8%; Sodium hexametaphosphate 99 5.8%; Active lime powder 2.5%; Aluminum silicate fiber 0.8%; With explosion-proof fiber 0.1%.
Preferably, form by following raw materials by weight: middle-grade magnesia 89.4%; Soft clay 4%; Sodium hexametaphosphate 99 4%; Active lime powder 1.5%; Aluminum silicate fiber 1%; With explosion-proof fiber 0.1%.
Preferably, form by following raw materials by weight: middle-grade magnesia 93.8%; Soft clay 2%; Sodium hexametaphosphate 99 2%; Active lime powder 0.5%; Aluminum silicate fiber 1.5%; With explosion-proof fiber 0.2%.
Preferably, described middle-grade magnesia is by 3 ~ 1mm, 1 ~ 0.5mm, and four gratings of 0.5 ~ 0.088mm and 180 orders constitute, and weight percent is respectively: 30 ~ 35%, 15 ~ 20%, 10 ~ 20% and 30 ~ 35%; The staple length of described aluminum silicate fiber is 3 ~ 5mm.
Above-mentioned continuous casting tundish magnesia coating is carbon-free tundish paint.
To sum up, the invention provides two kinds of continuous casting tundish magnesia coatings: low-carbon (LC) tundish paint and carbon-free tundish paint compared with prior art have following advantage:
1, carbon content is low or carbon-free in the coating, can reduce or avoid to guarantee to water steel quality because of the higher steel that cause of carbon content in the coating " carbon " content increases, and has improved the rate of steel products produced to steel ingots;
2, coating has improved anti-erosion and perviousness, is difficult for causing the phenomenon of " sticking bag ", provides reliable assurance smoothly for producing;
3, adopt soft clay and Sodium hexametaphosphate 99 as wedding agent, the space of energy filling paint, the compactness of raising weave construction, therefore, slip has suitable viscosity, and is good with the permanent layer adhesivity, can not fall the phenomenon of caving in after rise.
Embodiment
Core concept of the present invention is, adopts soft clay and Sodium hexametaphosphate 99 as wedding agent, to reduce the content of paper fiber in the magnesia coating component.
Embodiment 1:
The described continuous casting tundish of present embodiment magnesia coating is the low-carbon (LC) tundish paint, is made up of following raw materials by weight: middle-grade magnesia 85 ~ 95%; Soft clay 2 ~ 6%; Sodium hexametaphosphate 99 2 ~ 6%; Active lime powder 0.4 ~ 2.5%; Paper fiber 0.4 ~ 0.8%; With explosion-proof fiber 0.1 ~ 0.2%.100 tons of preparation coating, the proportion relation of each component is as shown in table 1 in its raw material.
Table 1: unit: Kg
| Middle-grade magnesia | Soft clay | Sodium hexametaphosphate 99 | Active lime powder | The paper fiber | Explosion-proof fiber | |
| 1 | 850 | 58 | 58 | 25 | 8 | 1 |
| 2 | 900 | 40 | 40 | 5 | 4 | 1 |
| 3 | 947 | 20 | 20 | 4 | 7 | 2 |
Middle-grade magnesia described in the present embodiment is by 3 ~ 1mm, 1 ~ 0.5mm, and four gratings of 0.5 ~ 0.088mm and 180 orders constitute, and weight percent is respectively: 30 ~ 35%, 15 ~ 20%, 10 ~ 20% and 30 ~ 35%; Soft clay is 180 orders; Active lime powder 100 orders.
Need to prove that the fiber of paper described in the present embodiment is preferentially selected the newspaper fiber for use.
Embodiment 2:
The described continuous casting tundish of present embodiment magnesia coating is carbon-free tundish paint, is made up of following raw materials by weight: middle-grade magnesia 85 ~ 94%; Soft clay 2 ~ 6%; Sodium hexametaphosphate 99 2 ~ 6%; Active lime powder 0.5 ~ 2.5%; Aluminum silicate fiber 1 ~ 1.5%; With explosion-proof fiber 0.1 ~ 0.2%.100 tons of preparation coating, the proportion relation of each component is as shown in table 2 in its raw material.
Table 2: unit: Kg
| Middle-grade magnesia | Soft clay | Sodium hexametaphosphate 99 | Active lime powder | Aluminum silicate fiber | Explosion-proof fiber | |
| 1 | 850 | 58 | 58 | 25 | 8 | 1 |
| 2 | 894 | 40 | 40 | 15 | 10 | 1 |
| 3 | 938 | 20 | 20 | 5 | 15 | 2 |
Middle-grade magnesia described in the present embodiment is by 3 ~ 1mm, 1 ~ 0.5mm, and four gratings of 0.5 ~ 0.088mm and 180 orders constitute, and weight percent is respectively: 30 ~ 35%, 15 ~ 20%, 10 ~ 20% and 30 ~ 35%; The staple length of described aluminum silicate fiber is 3 ~ 5mm; Soft clay is 180 orders; Active lime powder 100 orders.
During preparation, above-mentioned raw materials is weighed according to prescription, stir in the adding stirrer, promptly get described continuous casting tundish magnesia coating, pack packing at last.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1, continuous casting tundish magnesia coating is characterized in that, is made up of following raw materials by weight:
Middle-grade magnesia 85 ~ 95%; Soft clay 2 ~ 6%; Sodium hexametaphosphate 99 2 ~ 6%; Active lime powder 0.4 ~ 2.5%; Paper fiber 0.4 ~ 0.8%; With explosion-proof fiber 0.1 ~ 0.2%.
2, continuous casting tundish magnesia coating according to claim 1 is characterized in that, is made up of following raw materials by weight:
Middle-grade magnesia 85%; Soft clay 5.8%; Sodium hexametaphosphate 99 5.8%; Active lime powder 2.5%; Paper fiber 0.8%; With explosion-proof fiber 0.1%.
3, continuous casting tundish magnesia coating according to claim 1 is characterized in that, is made up of following raw materials by weight:
Middle-grade magnesia 90%; Soft clay 4%; Sodium hexametaphosphate 99 4%; Active lime powder 1.5%; Paper fiber 0.4%; With explosion-proof fiber 0.1%.
4, continuous casting tundish magnesia coating according to claim 1 is characterized in that, is made up of following raw materials by weight:
Middle-grade magnesia 94.7%; Soft clay 2%; Sodium hexametaphosphate 99 2%; Active lime powder 0.4%; Paper fiber 0.7%; With explosion-proof fiber 0.2%.
5, according to the described continuous casting tundish of arbitrary claim magnesia coating in the claim 1 to 4, it is characterized in that, described middle-grade magnesia is by 3 ~ 1mm, 1 ~ 0.5mm, 0.5 four gratings of ~ 0.088mm and 180 orders constitute, weight percent is respectively: 30 ~ 35%, 15 ~ 20%, 10 ~ 20% and 30 ~ 35%.
6, continuous casting tundish magnesia coating is characterized in that, is made up of following raw materials by weight:
Middle-grade magnesia 85 ~ 94%; Soft clay 2 ~ 6%; Sodium hexametaphosphate 99 2 ~ 6%; Active lime powder 0.5 ~ 2.5%; Aluminum silicate fiber 1 ~ 1.5%; With explosion-proof fiber 0.1 ~ 0.2%.
7, continuous casting tundish magnesia coating according to claim 6 is characterized in that, is made up of following raw materials by weight:
Middle-grade magnesia 85%; Soft clay 5.8%; Sodium hexametaphosphate 99 5.8%; Active lime powder 2.5%; Aluminum silicate fiber 0.8%; With explosion-proof fiber 0.1%.
8, continuous casting tundish magnesia coating according to claim 6 is characterized in that, is made up of following raw materials by weight:
Middle-grade magnesia 89.4%; Soft clay 4%; Sodium hexametaphosphate 99 4%; Active lime powder 1.5%; Aluminum silicate fiber 1%; With explosion-proof fiber 0.1%.
9, continuous casting tundish magnesia coating according to claim 6 is characterized in that, is made up of following raw materials by weight:
Middle-grade magnesia 93.8%; Soft clay 2%; Sodium hexametaphosphate 99 2%; Active lime powder 0.5%; Aluminum silicate fiber 1.5%; With explosion-proof fiber 0.2%.
10, according to the described continuous casting tundish of arbitrary claim magnesia coating in the claim 6 to 9, it is characterized in that, described middle-grade magnesia is by 3 ~ 1mm, 1 ~ 0.5mm, 0.5 four gratings of ~ 0.088mm and 180 orders constitute, weight percent is respectively: 30 ~ 35%, 15 ~ 20%, 10 ~ 20% and 30 ~ 35%; The staple length of described aluminum silicate fiber is 3 ~ 5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008101973258A CN101386543A (en) | 2008-10-22 | 2008-10-22 | Continuous casting tundish magnesia coating |
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| CNA2008101973258A CN101386543A (en) | 2008-10-22 | 2008-10-22 | Continuous casting tundish magnesia coating |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921121A (en) * | 2010-07-07 | 2010-12-22 | 德清县凯瑞新材料有限公司 | Work layer coating of steel casting tundish |
| CN101519311B (en) * | 2009-04-01 | 2011-08-31 | 武汉钢铁(集团)公司 | Magnesia-carbon gunning material for converter or electric furnace |
| CN102515805A (en) * | 2011-12-23 | 2012-06-27 | 中钢集团洛阳耐火材料研究院有限公司 | Magnesian refractory castable binding agent |
| CN103467112A (en) * | 2013-08-22 | 2013-12-25 | 长兴攀江冶金材料有限公司 | Preparation method of waste magnesia carbon brick black smearing material |
| CN103467110A (en) * | 2013-08-22 | 2013-12-25 | 长兴攀江冶金材料有限公司 | Waste magnesia carbon brick black smearing material |
| CN103642974A (en) * | 2013-12-04 | 2014-03-19 | 海城市金福锋耐火材料有限公司 | Long-life magnesian gunite mixture for rotary furnace |
| CN106587899A (en) * | 2016-11-10 | 2017-04-26 | 安徽新盾消防设备有限公司 | Powdery material for cable-hole fireproof sealing |
| CN109467413A (en) * | 2018-12-14 | 2019-03-15 | 浙江红鹰集团股份有限公司 | Continuous casting production no paper fibers magnesia coating and preparation method thereof |
| CN112851379A (en) * | 2021-02-02 | 2021-05-28 | 德清凯瑞高温材料股份有限公司 | Tundish fireproof plastic coating and preparation method thereof |
-
2008
- 2008-10-22 CN CNA2008101973258A patent/CN101386543A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101519311B (en) * | 2009-04-01 | 2011-08-31 | 武汉钢铁(集团)公司 | Magnesia-carbon gunning material for converter or electric furnace |
| CN101921121A (en) * | 2010-07-07 | 2010-12-22 | 德清县凯瑞新材料有限公司 | Work layer coating of steel casting tundish |
| CN101921121B (en) * | 2010-07-07 | 2013-01-02 | 德清县凯瑞新材料有限公司 | Work layer coating of steel casting tundish |
| CN102515805A (en) * | 2011-12-23 | 2012-06-27 | 中钢集团洛阳耐火材料研究院有限公司 | Magnesian refractory castable binding agent |
| CN103467112A (en) * | 2013-08-22 | 2013-12-25 | 长兴攀江冶金材料有限公司 | Preparation method of waste magnesia carbon brick black smearing material |
| CN103467110A (en) * | 2013-08-22 | 2013-12-25 | 长兴攀江冶金材料有限公司 | Waste magnesia carbon brick black smearing material |
| CN103467112B (en) * | 2013-08-22 | 2015-02-04 | 长兴攀江冶金材料有限公司 | Preparation method of waste magnesia carbon brick black smearing material |
| CN103642974A (en) * | 2013-12-04 | 2014-03-19 | 海城市金福锋耐火材料有限公司 | Long-life magnesian gunite mixture for rotary furnace |
| CN106587899A (en) * | 2016-11-10 | 2017-04-26 | 安徽新盾消防设备有限公司 | Powdery material for cable-hole fireproof sealing |
| CN109467413A (en) * | 2018-12-14 | 2019-03-15 | 浙江红鹰集团股份有限公司 | Continuous casting production no paper fibers magnesia coating and preparation method thereof |
| CN112851379A (en) * | 2021-02-02 | 2021-05-28 | 德清凯瑞高温材料股份有限公司 | Tundish fireproof plastic coating and preparation method thereof |
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Open date: 20090318 |