CN1189272C - Slide gate nozzle brick utilized in metallurgic cast and prepn. thereof - Google Patents
Slide gate nozzle brick utilized in metallurgic cast and prepn. thereof Download PDFInfo
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- CN1189272C CN1189272C CNB021386757A CN02138675A CN1189272C CN 1189272 C CN1189272 C CN 1189272C CN B021386757 A CNB021386757 A CN B021386757A CN 02138675 A CN02138675 A CN 02138675A CN 1189272 C CN1189272 C CN 1189272C
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- smelting
- sliding sprue
- sprue tile
- metallurgical casting
- slide gate
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Abstract
The present invention relates to an improvement of slide gate nozzle brick used for metallurgic cast, particularly to the composition and the preparation of refractory materials of slide gate nozzle bricks. The present invention is characterized in that at least on the working surface of a slide gate nozzle brick is basically formed by the mix of 75 to 98 % (weight, the same below) of refractory aggregate with high content of Al2O3 and 2 to 25 % metallic fine particles of which the fusing point is below 1000 DEG C, and is fired at 400 to 1300 DEG C under the neutral or reducing atmosphere to obtain a slide gate nozzle brick with a metal combined high-alumina refractory material surface. Because the refractory materials of the present invention are evenly distributed with low-melting metallic particles, the material hardness is greatly enhanced, and the smoothness surfaces and the hardness of slide gate nozzle bricks are enhanced, so that the operating performance of slide gate nozzle bricks is largely enhanced. The present invention has the advantages of high structural strength, good antioxidation, good corrosion resistance, good thermal shock resistance, good high-temperature abrasion resistance, and no rough surfaces. The present invention can be used for the casting of different molten steel, so that the adaptability of slide gate nozzle bricks to molten steel can be increased.
Description
Technical field
The invention relates to the improvement of metallurgy casting (molten steel casting) with sliding sprue tile for smelting composition and preparation method.
Background technology
Four big class materials such as at present metallurgical casting is used always with sliding sprue tile for smelting (mouth of a river, slide brick) up and down up and down aluminium carbon, aluminium zirconium carbon, magnesia, corundum, development along with process for making, sliding sprue tile for smelting is required to improve day by day, especially heat shock resistance, anti-erosion, thermal structure intensity and wear resistance at elevated temperature are proposed requirements at the higher level.Yet aluminium carbon, aluminium zirconium carbon based slide gate nozzle brick, though it is good to have thermal shock resistance, advantages of high strength, but there is easy oxidation shortcoming, can reduce because of oxidation causes thermal structure intensity during the logotype of many stoves of slide brick, the plate face is loose, and serious meeting produces working surface layers and waters steel zone plucking, fine powder obscission, be called " waste face ", cause slide brick switch difficulty even jeopardize safety in production; Secondly, contain carbon slide brick when casting soft steel, the carbon in the refractory materials fuses in the molten steel easily, causes molten steel recarburization, influences the quality of steel; ZrO in the aluminum-zirconium-carbon slide besides
2Easily with molten steel in the FeO reaction form eutectic, the further weave construction of weave construction, the especially working surface layers of deterioration slide brick.Though magnesia slide brick has good erosion-resisting characteristics and antioxidant property, its hot strength is low, not anti-molten steel scouring, and also heat-shock resistance is also poor, causes the slide brick cracking to damage easily.Though corundum slide brick antioxidant property is good, hot strength is not enough, erosion-resisting characteristics is also poor, and working surface layers is watered the steel district and easily produced " waste face ".When the long-time aperture of slide brick less than 60%, this phenomenon is more outstanding.Above-mentioned slide brick contains SiO in casting
2, during the higher steel grade of composition such as MnO, FeO, CaO and oxygen level, erosion resistance, anti-mechanical wear are poorer.In addition, last lower nozzle brick is in use also often because of refractory materials reason such as anti-erosion not, cause defectives such as reaming, crackle and work-ing life shorter.
People are for improving hot strength, heat-shock resistance, high temperature abrasion resistance and the corrosion resistance of sliding sprue tile for smelting, especially be devoted to carry out the research that improves the sliding sprue tile for smelting component: pass through to adopt at least 3 parts of aluminium oxynitrides and 0.5-60 part carbon and/or carbonaceous material as Chinese patent 85109111, all the other are the sliding sprue tile for smelting of other refractory raw materials, corrode and heat shock resistance to improve anti-FeO; (corundum is 2-5 with the ratio of mullite to Chinese patent 93106942: 1) be base-material (70-90Wt%) and the compound manufacturing sliding sprue tile for smelting of boron nitride (10-30Wt%), to keep good high-temperature intensity and thermal shock resistance with based on zirconium corundum, mullite by adopting; One or both are 90-100% in Chinese patent 01126439 disclosed employing magnesia and the aluminum-spinel, surplus is the sliding sprue tile for smelting of zirconium white or titanium oxide, be used for high-oxygen steel and calcium treated steel, to keep favorable mechanical performance, erosion resistance and resistance of oxidation; Chinese patent 00119505 disclosed 5% the Sialon (silicon, aluminium, oxygen, the plain material of nitrogen quaternary) that contains at least, all the other are the sliding sprue tile for smelting of other refractory raw materials, can make sliding sprue tile for smelting have good anti-oxidant, thermal shock resistance.Yet above-mentioned various sliding sprue tile for smelting all is that individual event solves problem in a certain respect, and its over-all properties is still not ideal enough, and some cost is bigger.
Summary of the invention the objective of the invention is to overcome the deficiency of above-mentioned prior art, and a kind of structural strength height is provided, and anti-oxidant, anti-erosion and heat-shock resistance are all good, adaptable metallurgical casting sliding sprue tile for smelting.
Another object of the present invention is to provide a kind of preparation method of above-mentioned sliding sprue tile for smelting.
The present invention's first purpose realizes, the main improvement is sliding sprue tile for smelting working surface layers at least, adopts high Al
2O
3The metal particle of content refractory aggregate and fusing point＜1000 ℃ mixes and burns till, and obtains a kind ofly having melts combine high alumina matter working surface layers or sliding sprue tile for smelting, thereby significantly improves the structural strength of sliding sprue tile for smelting, anti-oxidant, anti-erosion and thermal shock resistance.Specifically, sliding sprue tile for smelting is used in the metallurgical casting of the present invention, it is characterized in that working surface layers is the high Al of 75-98% basically by weight percent at least
2O
3The metal particle of the refractory aggregate of content and the fusing point of 2-25%＜1000 ℃ mixes to be formed.Through being fired into whole homogeneity sliding sprue tile for smelting that a kind of metal (aluminium)-oxygen-nitrogen sosoloid forms or the composite slide nozzle brick that contains this working surface layers.
For guaranteeing that effectively sliding sprue tile for smelting has mechanical property preferably, said working surface layers is being excellent greater than 15% of sliding sprue tile for smelting thickness, the sliding sprue tile for smelting performance improves along with thickening of working surface layers, take economy into consideration, the general work surface thickness is excellent with the composite slide nozzle brick of 30-50%, its bottom can be general refractory materials, as refractory materialss such as conventional aluminium carbon, common high alumina matter.High Al of the present invention
2O
3The refractory aggregate of content especially adopts corundum and/or calcining alumine and high temperature alumina, and the grain composition of refractory aggregate is by the design of known An Deliesen (Andreasen) theory of high packing.The present invention especially replaces corundum with the calcining alumine that 10-65% does not wait, and under the topic, can significantly reduce production costs before basic maintenance performance.Said corundum can be various commercially available corundum raw materials, as fused white corundum, electric smelting compact alumina, electric smelting high alumina corundum, fused brown corundum, sintering plate corundum and alundum.The metal of said fusing point＜1000 ℃ is (for ease of describing, the present invention is called for short low melting metal) particulate, it for example can be the fine powder that Mg, Al, Zn, Sn, Ba, Pb one or more or theys' alloy is processed into, suitable particle diameter be≤1 and＞0mm, cross and slightly will lose or reduce the effect that low melting metal adds, the meticulous swelling cracking that easily causes, the effect of low melting metal particulate are can form good weave construction with refractory aggregate after the thermal treatment.Consider the easy and factors such as safety in production and cost of making, low melting metal particulate of the present invention especially with metallic aluminium for well.The fiber of the above-mentioned metal or alloy of all right 0.5-3% (weight) replaces in metal particle in addition, with the further slide gate nozzle tile product thermal shock resistance that improves, improves intensity.The present invention is favourable moulding and improves sintering character that the plastic clay that can also add 1-10% (weight) is as binding substances.For further improving sliding sprue tile for smelting intensity of the present invention and use properties, after sliding sprue tile for smelting is fired, preferably be aided with bituminizing again, reach sealing brick body inner opening pore and strengthening surface slickness, making up and down, slide plate has better throttle switch function.For improving the performance of sliding sprue tile for smelting, also can add common micro-refractory raw material in the refractory materials of the present invention, as silicon carbide, carbon black etc.
The preparation of sliding sprue tile for smelting of the present invention comprises with weight percent being the high Al of 75-98%
2O
3The low melting metal particulate of the refractory aggregate of content, 2-25%, add the wedding agent of 2-15%, thorough mixing is even, is pressed into homogeneity or composite product, and burn till through 400-1300 ℃ under reduction or neutral atmosphere dry back.
Wedding agent of the present invention can be one or more combinations in bittern, tetraethyl silicate, the calcium lignin sulphonate aqueous solution, water glass, the polyvinyl alcohol, add-on is for adding 2-15% (weight), less than 2% or greater than 15% moulding difficulty relatively, so the add-on scope of 2-15% is comparatively appropriate through test wedding agent dosage.In above-mentioned wedding agent, the present invention preferably adopts the combined binder of the calcium lignin sulphonate aqueous solution composition that adds 2% bittern, 2-3%.Said reducing atmosphere of the present invention or neutral atmosphere can adopt rare gas element such as nitrogen, argon gas or bury the carbon protection; Or bury burning (for example burying quartz sand).The better firing temperature of sliding sprue tile for smelting of the present invention is 400-1300 ℃, be lower than 400 (℃, be difficult to guarantee enough intensity, be higher than 1300 ℃, can produce swelling cracking because of low melting metal particulate over oxidation, nitrogenize.
The metallurgical casting of the present invention is with sliding sprue tile for smelting or the composite slide nozzle brick be made up of its working surface layers, because of adopting high Al
2O
3The refractory aggregate of content and low melting metal particulate all mix, then obtain a kind of melts combine high alumina matter sliding sprue tile for smelting by burning till, and because of homodisperse in its goods has metal particle (surface presents metalluster), not only significantly strengthened material hardness, and improved the surface smoothness and the hardness (especially working-surface contains metal particle and steel fiber) of sliding sprue tile for smelting, thereby the use properties of sliding sprue tile for smelting is improved greatly.Sliding sprue tile for smelting of the present invention has the structural strength height, and anti-oxidant, anti-erosion, heat-shock resistance are excellent, and wear resistance at elevated temperature is splendid, can not produce " waste face " phenomenon, goods Al
2O
3Content can reach 80-102%, C content 1-3%, cold crushing strength 150-300MPa, high temperature break resistant intensity (1400 ℃ of N
2* 0.5h) 20-46MPa (table two).Sliding sprue tile for smelting of the present invention or its working surface layers be owing to be low-carbon (LC), and because of having relatively large low melting metal or alloy to exist, and the oxidation of coal phenomenon takes place during use hardly reach and cause tissue deterioration thus.As press the sliding sprue tile for smelting sample that embodiment 1 makes, can even water the 4-6 heat at 70 tons of ladle upper slide bricks; Press the sliding sprue tile for smelting sample that embodiment 3 makes, on probation at 40 tons of ladles (more than 70 steel grade), slide brick can even water the 2-3 heat.Slide brick of the present invention is excellent property not only, and especially adapts to the special steel casting, to containing the higher molten steel of MnO, FeO and oxygen level very strong adaptability is arranged, and has improved the adaptability of slide brick to molten steel greatly.The used starting material of slide brick of the present invention need not handled through special process, the batching component is single, make simply, and have low burn till temperature (400-1300 ℃), save energy, with short production cycle, cost is low, especially adopts the calcining special grade bauxite grog cheaply be easy to get partly to replace corundum in the aggregate, and adopts refractory materials of the present invention to make compound surface layer, more can significantly reduce cost, make slide brick have higher P/C ratio.
Description of drawings
Fig. 1 is a composite slide of the present invention mouth of a river filling pipe end structural representation.
Fig. 2 is a composite slide of the present invention mouth of a river slide brick structural representation.
Embodiment
Embodiment:
Press embodiment table (table one), take by weighing raw material and the wedding agent handled well respectively, thorough mixing is even in muller, suppress the mouth of a river and slide plate respectively with brick pressing machine, adobe is after room temperature-300 ℃ drying, in reduction or neutral atmosphere, respectively through 1000 ℃/16h and 500 ℃/16h thermal treatment, the sosoloid sliding sprue tile for smelting of (aluminium)-oxygen-nitrogen that obtains having metal, again through bituminizing, slide brick is after polish, hoop-driving, assemble, be coated with face.
Can also distinguish the diameter 0.2-0.5mm that does not wait with 0.5-3% again, long 3-10mm% steel fiber substituted metal particulate;
Also available the foregoing description raw material is as the working face layered material of sliding sprue tile for smelting, working surface layers thickness is respectively 15%, 30%, 50% of sliding sprue tile for smelting thickness, bottom is compound conventional aluminium carbon or common high alumina refractories 2,3 respectively, obtains the composite slide nozzle brick (Fig. 1,2) of melts combine high alumina refractories working surface layers 1;
All right other low melting metals or alloy replace low melting metal in the foregoing description, have similar effect.
Sliding sprue tile for smelting of the present invention comprises filling pipe end, the following mouth of a river, upper slide, lower skateboard (upper slide, lower skateboard general designation slide brick).
Table one embodiment table
Illustrate: wedding agent is a said single or hybrid junctions mixture in the specification sheets, but the combined binder that wherein preferably adopts bittern, the calcium lignin sulphonate aqueous solution to form.
The slide brick performance of table two unlike material relatively
| Material | Aluminium carbon | Aluminium zirconium carbon | Corundum matter | Magnesia | The present invention | |
| Chemical ingredients % | Al 2O 3 | 80.26 | 78 | 96 | 80-102 | |
| MgO | 95 | |||||
| ZrO 2 | 7 | |||||
| C | 9.88 | 10 | 2.4 | 2.5 | 2.0 | |
| Apparent porosity, % | 6 | 5 | 9 | 10 | 6 | |
| Volume density, g/cm3 | 3.1 | 3.25 | 3.27 | 2.95 | 3.20 | |
| Compressive strength, MPa | 110 | 180 | 165 | 98 | 240 | |
| The anti-folding of high temperature, MPa | 12 | 20 | 18 | 12 | 35 | |
| Connect and water the stove number, inferior | 2 | 3 | 2 | 1 | 4 | |
| Reaming (anti-erosion) | Little | Little | Greatly | Greatly | Small | |
| Waste face (sliding area plucking) | Seriously | Seriously | Seriously | Seriously | Little | |
Annotate: go up table and compare in certain steel mill's trial state for the unlike material slide plate.
Claims (15)
1, sliding sprue tile for smelting is used in a kind of metallurgical casting, it is characterized in that working surface layers is the high Al of 75-98% basically by weight percent at least
2O
3The metal particle of the refractory aggregate of content and the fusing point of 2-25%＜1000 ℃ mixes to be formed.
2, sliding sprue tile for smelting is used in described metallurgical casting according to claim 1, it is characterized in that also can adding the plastic clay material of 1-10%.
3, use sliding sprue tile for smelting according to claim 1 or 2 described metallurgical casting, it is characterized in that said working surface layers thickness accounts for 15% of total thickness at least.
4, sliding sprue tile for smelting is used in described metallurgical casting according to claim 3, it is characterized in that described working surface layers thickness is the 30-50% of total thickness.
5, sliding sprue tile for smelting is used in described metallurgical casting according to claim 1, it is characterized in that said high Al
2O
3The refractory aggregate of content is corundum and/or calcining alumine and high temperature alumina.
6, sliding sprue tile for smelting is used in described metallurgical casting according to claim 5, it is characterized in that said calcining alumine accounts for the 10-65% of refractory aggregate.
7, sliding sprue tile for smelting is used in described metallurgical casting according to claim 1, it is characterized in that the metal particle of said fusing point＜1000 ℃, is Mg, Al, Zn, Sn, Ba, Pb one or more or theys' alloy.
8, sliding sprue tile for smelting is used in described metallurgical casting according to claim 7, it is characterized in that said metal particle is a metallic aluminium.
9, sliding sprue tile for smelting is used in described metallurgical casting according to claim 1, it is characterized in that said metal particle particle diameter≤1 and＞0mm.
10, state metallurgical casting according to claim 1,7,8 or 9 and use sliding sprue tile for smelting, it is characterized in that having in the said metal particle steel fiber of 0.5-3%.
11, use sliding sprue tile for smelting according to claim 1,2,5,6,7,8 or 9 described metallurgical casting, it is characterized in that being impregnated with pitch after said sliding sprue tile for smelting burns till.
12, sliding sprue tile for smelting is used in described metallurgical casting according to claim 4, it is characterized in that being impregnated with pitch after said sliding sprue tile for smelting burns till.
13, a kind of preparation method of sliding sprue tile for smelting according to claim 1 comprises with weight percent being the high Al of 75-98%
2O
3The low melting metal particulate of the refractory aggregate of content, 2-25%, add the wedding agent of 2-15%, thorough mixing is even, is pressed into homogeneity or composite product, and burn till through 400-1300 ℃ under reduction or neutral atmosphere dry back.
14,, it is characterized in that said wedding agent is one or more combinations in bittern, tetraethyl silicate, the calcium lignin sulphonate aqueous solution, water glass, the polyvinyl alcohol according to the preparation method of the described sliding sprue tile for smelting of claim 12.
15,, it is characterized in that said wedding agent is the calcium lignin sulphonate aqueous solution combined binder of 2% bittern, 2-3% according to the preparation method of claim 12 or 13 described sliding sprue tile for smelting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021386757A CN1189272C (en) | 2002-11-23 | 2002-11-23 | Slide gate nozzle brick utilized in metallurgic cast and prepn. thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021386757A CN1189272C (en) | 2002-11-23 | 2002-11-23 | Slide gate nozzle brick utilized in metallurgic cast and prepn. thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1415447A CN1415447A (en) | 2003-05-07 |
| CN1189272C true CN1189272C (en) | 2005-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021386757A Expired - Fee Related CN1189272C (en) | 2002-11-23 | 2002-11-23 | Slide gate nozzle brick utilized in metallurgic cast and prepn. thereof |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101747066B (en) * | 2008-12-13 | 2013-03-27 | 河南中原特种耐火材料有限公司 | Lip tile and preparation method thereof |
| FI122542B (en) * | 2009-01-15 | 2012-03-15 | Indref Oy | Slide plate and lower nozzle combination and method for repairing slider plate and lower nozzle combination |
| CN107010926A (en) * | 2017-05-14 | 2017-08-04 | 石磊 | A kind of preparation method of metallurgical casting water nozzle brick |
| CN107473759B (en) * | 2017-09-29 | 2020-09-29 | 河南熔金高温材料股份有限公司 | Homogenizing material toughened aluminum-carbon lower nozzle brick and production method thereof |
| CN110642633B (en) * | 2019-10-30 | 2022-05-13 | 浙江自立高温科技股份有限公司 | Carbon-free pouring nozzle of steel ladle and preparation method thereof |
| CN114346228B (en) * | 2022-01-11 | 2023-08-01 | 鞍山市家源耐火材料制造有限公司 | Environment-friendly dust suppression drainage sand and preparation method thereof |
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2002
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| CN1415447A (en) | 2003-05-07 |
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