CN101429037B - Aluminum-carbon sliding tile and method of producing the same - Google Patents
Aluminum-carbon sliding tile and method of producing the same Download PDFInfo
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- CN101429037B CN101429037B CN2007101580729A CN200710158072A CN101429037B CN 101429037 B CN101429037 B CN 101429037B CN 2007101580729 A CN2007101580729 A CN 2007101580729A CN 200710158072 A CN200710158072 A CN 200710158072A CN 101429037 B CN101429037 B CN 101429037B
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Abstract
The invention provides an aluminum-carbon sliding brick, which comprises the following compositions: 60 to 75 percent of aggregate, 15 to 30 percent of powder, 1 to 6 percent of carbon element materials, 2 to 7 percent of antioxidant and 3 to 20 percent of additive. The production method for the aluminum-carbon sliding brick comprises the following steps: firstly, the powder in the raw materials is premixed and prepared into mixed powder for standby; secondly, mixing is performed according to the feeding order of granular materials, a binder and the mixed powder; thirdly, the mixture is discharged and subjected to mechanical pressing; and fourthly, a green brick is dried and prepared into the aluminum-carbon sliding plate brick by an unfired technology or a light burning technology. The method adds nitride and spinel materials in the sliding brick to substantially improve the thermal shock stability of the sliding brick, so as to achieve the level of the aluminum-zirconium-carbon sliding brick; and because the addition of Al metals is adequately increased, air holes can be filled, and the method reduces the brittleness of materials, is favorable for green brick formation, and improves the volume density, the normal temperature strength and the high temperature strength, so as to improve the oxidation resistance of the sliding brick. The aluminum-carbon sliding brick produced by the method not only has good product quality and high strength but also has simple procedure and saves the sintering cost.
Description
Technical field
The invention belongs to technical field of refractory materials, relate in particular to the slide brick and the manufacture method thereof of a kind of ladle, tundish control stream usefulness.
Background technology
Slide plate is the functional refractory materials of continuous casting, requires it to have higher high temperature strength, good thermal shock resistance and good oxidation-resistance, scour resistance.Present widely used have aluminum-carbon sliding tile and aluminum-zirconium-carbon slide brick.Because the manufacturing of zirconium-containing materials such as contained zirconium mullite and zircon corundum and using works the mischief to environment in the aluminum-zirconium-carbon slide brick, now more and more tends to use the no zirconium slide brick of environmental protection more.Yet the use properties of traditional aluminum-carbon sliding tile is lower than aluminum-zirconium-carbon slide brick, especially aspect thermal shock resistance, can not satisfy the needs of large-scale ladle sequence casting.And emerging metal nitride is in conjunction with slide brick cost of manufacture height not only, and the firing process complexity.
" metal A l-Si is in conjunction with Al for document
2O
3The performance of-C slide plate and use " [refractory materials, 2007,41 (3) 205～207] introduced a kind of energy-saving low-carbon (LC) metal A l-Si in conjunction with Al
2O
3-C slide plate, its process characteristic is an easy fired.But this slide plate is a melts combine, and metal A l-Si add-on is more, because the price of metal A l-Si powder is more expensive, so production cost is very high.Slide plate burns till AlN and the easy aquation of AlC that the back generates, and complex manufacturing.
Document " characteristic of modified resin and the effect in alumina-carbon material " [refractory materials, 2007,41 (supplementary issues) 173～176] introduced the comparison of the three kind modified resin oxidation-resistances different with common resol, and the effect of silicon modified resin and boron modified resin improvement sample hydration resistance.The practical effect of modified resin is still waiting further to judge by site test results.And using modified resin to make alumina-carbon slide plate, cost is high.
Document " metal nitride is in conjunction with the development and the application of slide plate " [refractory materials, 2003,37 (5): 271-273] having introduced a kind of is main raw material with corundum and metallic aluminium powder, adopt nitridation sintered technology, with metallic aluminium and aluminium nitride as slide plate in conjunction with mutually metallic aluminium-aluminium nitride combined corundum slide plate.This slide plate is metallic aluminium and aluminium nitride combination, and not only the add-on of metallic aluminium is big, and the production cost height, nitrogenize firing process complexity.
Document " the combining corundum based slide plate Study on slag resistance of metal nitride " [silicate journal, 2005,33 (2): 257] introduced the combining corundum based slide plate of a kind of metal nitride, this slide plate is main thing phase with corundum, contain a spot of metallic aluminium fiber in the material, the part metals aluminium in the material is when slide plate is nitridation sintered and N
2Reaction forms AlN, and the AlN that reaction forms is filled in the space between the corundum in granules, and the reaction of generation is attended by 26% volumetric expansion effect, has improved the density of material.This slide plate equally also exists the add-on of metallic aluminium big, production cost height, nitrogenize firing process complicated problems.
Summary of the invention
The object of the present invention is to provide a kind of novel aluminum carbon slide brick and manufacture method thereof that can effectively improve conventional aluminum carbon slide brick thermal shock resistance.
Aluminum-carbon sliding tile of the present invention is formed (parts by weight) by following one-tenth branch: aggregate 60%～75%, powder 15%～30%, carbon materials 1%～6%, oxidation inhibitor 2%～7%, admixture 3%～20%, described aggregate is a sintering plate corundum, alundum, the particulate material of one or more in fused white corundum and the electric smelting compact alumina, described powder is a sintering plate corundum, alundum, the fine powder of one or more in fused white corundum and the electric smelting compact alumina and activated alumina micro mist, described carbon materials is a graphite, in electrode powder or the carbon black one or more, described oxidation inhibitor is a carbide, boride, oxynitride, Pure Silicon Metal, aluminium-magnesium alloy powder, in the aluminium silica flour one or more, described admixture are metallic aluminium, in nitride and the spinel family one or more.
The grain diameter of aggregate of the present invention is 5～0.1mm; Particle diameter＜the 0.088mm of described corundum fine powder, the particle diameter≤5um of activated alumina micro mist; The granularity of described carbon materials＜100 orders, and C 〉=90%; Granularity＜the 0.088mm of described oxidation inhibitor.
Admixture of the present invention can be powdery, fine particulate or fibrous, its granularity or diameter＜0.5mm; Nitride as admixture can be silicon nitride or aluminium nitride, can be electric melting magnesium aluminum spinel or sintering magnesium-aluminium spinel as the spinel family of admixture.
The manufacture method of aluminum-carbon sliding tile of the present invention is: after each composition was prepared burden to scale, with all powders elder generation premixs in premixed device, it was standby to make powder mix; Mix by following order of addition(of ingredients): 2～5 minutes → wedding agent of particulate material → dry blending → 3～10 minutes → powder mix of mixing → mixing 15～45 minutes, discharging; Mechanical pressing, adobe was through 180～220 ℃ of dryings 36～48 hours; Adopt and do not burn or light-burned technology; Boring, hoop-driving, grind, coating.
The used wedding agent of aluminum-carbon sliding brick producing process of the present invention is a resol, and its add-on is 3%～6%.Admixture as described is the metallic aluminium fiber, then progressively adds in dry mixed while of particulate material.
The present invention by in the slide brick prescription, add nitride, spinel material significantly improves the thermal shock resistance of aluminum-carbon sliding, reached the level of aluminum-zirconium-carbon slide, suitably increased the add-on of metal A l, metal A l is plastic state under the high temperature, can fill pore, reduce the fragility of stupalith simultaneously.The adding of an amount of metal A l also helps the moulding of base substrate, has improved volume density and normal, the hot strength of slide plate, thereby has improved the oxidation-resistance of slide plate.The present invention compares with the combining corundum based slide plate of metal nitride, and the consumption of metallic aluminium has reduced a lot, adopts and does not burn or light-burned technology, has solved the challenge of nitrogenize firing process, increases cost of manufacture hardly, and result of use meets or exceeds aluminum-zirconium-carbon slide.Adopt the present invention to produce aluminum-carbon sliding tile and both saved the expense of burning till, simplify manufacturing process again, and good product quality, economic benefit is considerable.
Embodiment
The present invention will be further described below by embodiment.
At first the used particulate material of the aluminum-carbon sliding tile of the present invention that provides in table 1 embodiment and the ratio and the granularity of powder are equipped with, in premixed device, all powders are carried out premix again, it is standby to make powder mix, mix by following order of addition(of ingredients) with the high speed muller then: 3 minutes (adding the metallic aluminium fiber simultaneously) → wedding agent (5% resol) → 7 minutes → powder mixs of mixing of particulate material → dry blending → mixing 30 minutes, discharging, with 1000 tons of friction press moulding, adobe was through 200 ℃ of dryings 48 hours, boring at last, hoop-driving, grind, coating makes the alumina-carbon slide plate brick.The test rating of finished product aluminum-carbon sliding tile sees Table 2.
The proportioning of each composition of table 1 embodiment of the invention slide brick
| Material composition | Granularity or diameter | The embodiment of the invention (parts by weight) | |||||
| 1 | 2 | 3 | 4 | 5 | |||
| Aggregate | The sintering plate corundum particle | 3～0.1mm | 62 | 35 | - | 25 | 30 |
| The fused white corundum particle | - | 15 | - | - | 31 | ||
| Electric smelting compact alumina particle | - | 13 | 65 | 40 | - | ||
| Powder | The sintering plate corundum powder | ＜0.088mm | 7 | 6 | 5 | 7 | - |
| The alundum powder | - | - | 5 | 8 | - | ||
| The fused white corundum powder | 5 | 7 | 6 | - | 11 | ||
| The activated alumina micro mist | ≤5um | 6 | 6 | 3 | 3 | 7 | |
| Carbon materials | Graphite | ＜100 orders | 3 | - | - | - | - |
| The electrode powder | ＜0.088mm | 1 | 2 | - | - | - | |
| Carbon black | N330 | 1 | 2 | 4 | 2 | 4 | |
| Admixture | Metallic aluminium powder | ＜0.5mm | 5 | - | 3 | 4 | 3 |
| The metallic aluminium fiber | - | - | 2 | 2 | 2 | ||
| Aluminum nitride powder | ＜0.088mm | - | 8 | - | 3 | 3 | |
| Electric smelting MA spinel powder | - | - | - | - | 7 | ||
| Silicon nitride powder | 8 | - | 5 | 3 | - | ||
| Oxidation inhibitor | Metallic silicon power | ＜0.088mm | - | 4 | 2 | 2 | - |
| Norbide | 2 | 2 | - | 1 | 2 | ||
The main performance index of table 2 embodiment of the invention slide brick product
| Performance index | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Apparent porosity, % | 4.5 | 5.0 | 3.9 | 3.6 | 4.0 |
| Volume density, g/cm 3 | 3.05 | 3.04 | 3.10 | 3.13 | 3.11 |
| Cold crushing strength, Mpa | 112 | 126 | 135 | 140 | 138 |
| High temperature break resistant intensity, Mpa | 30.5 | 26.4 | 35.8 | 36.1 | 33.9 |
Claims (7)
1. aluminum-carbon sliding tile, it is characterized in that by the weight percent that following one-tenth branch is formed being: aggregate 60%～75%, powder 15%～30%, carbon materials 1%～6%, oxidation inhibitor 2%～7%, admixture 3%～20%, described aggregate is an alundum, the particulate material of one or more in fused white corundum and the electric smelting compact alumina, described powder is an alundum, the fine powder of one or more in fused white corundum and the electric smelting compact alumina and activated alumina micro mist, described carbon materials is a graphite, in electrode powder or the carbon black one or more, described oxidation inhibitor is a carbide, boride, oxynitride, Pure Silicon Metal, aluminium-magnesium alloy powder, in the aluminium silica flour one or more, described admixture are metallic aluminium, in nitride and the spinel family one or more.
2. aluminum-carbon sliding tile according to claim 1, the grain diameter that it is characterized in that described aggregate is 5～0.1mm; Particle diameter＜the 0.088mm of described alundum, fused white corundum and electric smelting compact alumina fine powder, the particle diameter of activated alumina micro mist≤5 μ m; The granularity of described carbon materials＜100 orders, and C 〉=90%; Granularity＜the 0.088mm of described oxidation inhibitor.
3. aluminum-carbon sliding tile according to claim 1 is characterized in that described admixture is powdery, fine particulate or fibrous, its granularity or diameter＜0.5mm.
4. according to claim 1 or 3 described aluminum-carbon sliding tiles, it is characterized in that described nitride is silicon nitride or aluminium nitride, described spinel family is electric melting magnesium aluminum spinel or sintering magnesium-aluminium spinel.
5. the manufacture method of arbitrary aluminum-carbon sliding tile in the claim 1～4, after it is characterized in that each composition prepared burden to scale, with all powders premix in premixed device earlier, it is standby to make powder mix; Mix by following order of addition(of ingredients): 2～5 minutes → wedding agent of particulate material → dry blending → 3～10 minutes → powder mix of mixing → mixing 15～45 minutes, discharging; Mechanical pressing, adobe was through 180～220 ℃ of dryings 36～48 hours; Adopt and do not burn or light-burned technology; Boring, hoop-driving, grind, coating.
6. the manufacture method of aluminum-carbon sliding tile according to claim 5 is characterized in that described wedding agent is a resol, and add-on is 3%～6%.
7. the manufacture method of aluminum-carbon sliding tile according to claim 5 is characterized in that progressively adding the metallic aluminium fiber in dry mixed while of particulate material.
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| CN2007101580729A CN101429037B (en) | 2007-11-07 | 2007-11-07 | Aluminum-carbon sliding tile and method of producing the same |
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| CN2007101580729A CN101429037B (en) | 2007-11-07 | 2007-11-07 | Aluminum-carbon sliding tile and method of producing the same |
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| CN101429037A CN101429037A (en) | 2009-05-13 |
| CN101429037B true CN101429037B (en) | 2011-11-02 |
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Assignee: Anshan Chosun Refractories Co.,Ltd. Assignor: Refractory Material Co. of Angang Steel Group Contract record no.: 2011210000139 Denomination of invention: Aluminum-carbon sliding tile and method of producing the same License type: Exclusive License Open date: 20090513 Record date: 20110921 |
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Address after: 114000 Anshan Iron and steel plant, Tiexi District, Anshan, Liaoning Patentee after: ANSHAN IRON AND STEEL GROUP REFRACTORY Co.,Ltd. Address before: 114021 Angang Group refractory materials company, Anshan Iron and steel factory, Tiexi District, Anshan, Liaoning Patentee before: ANGANG GROUP REFRACTORIES Co. |