企业特殊行业经营资质信息公示
点击图片查看原图电熔致密刚玉就是以工业氧化铝为主要原料，在三相电弧炉内使γ-AL2O3转变为α- AL2O3而成。γ-AL2O3转变为α-AL2O3是单向的致密刚玉，主晶相大于96%，气孔率小于4%，转化后的体积变化率大约缩小14%左右，因此致密刚玉具有良好的抗酸碱性能，在高温下具有良好的耐磨、抗侵蚀及体积稳定性。
致密刚玉作为**耐火材料，广泛应用于冶金、石化、建材、高温陶瓷、机械等行业，特别是在陶瓷辊道棒、连铸三大件、大型出铁沟等方面有广泛的用途。
Dense fused corundum is made fromγ-Al2O3 by transforming it intoα- Al2O3, which is aunidirectionalprocess, in the 3-phase Arc Furnace, using industrialalumina asmain raw material. Its main crystal phase content is morethan 96%,while the porosity rate less than 4%.And the volume-changeratiodecrease by about 14% after the transformation, hence, densefusedcorundum possesses good acid and kali resistance, and hasgoodabrasion-resistance, erosion-resistance and volume stabilityathigh temperature.
As a kind of top refractorymaterial,dense fused corundum is widely used in industries likemetallurgy.,petrochemical, building materials, high temperatureceramics,mechanical manufacture and etc., especially in themanufacture ofthe ceramic rollers, three-pieces shroud, monolithicstopper andiron runners for large blast furnace and so on.
致密电熔刚玉理化指标Dense Fused Corundum’sphysiochemicalindexes:
|
规格specifications |
主要化学成分main chemical component % |
磁性物magnetic material content% |
||||
|
Al2O3 |
Fe2O3 |
SiO2 |
Na2O |
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|
I |
段砂section sand |
≥98.3 |
≤0.15 |
≤1.00 |
≤0.10 |
≤0.15 |
|
细粉fine powder |
≥987.8 |
≤0.30 |
≤0.10 |
|||
|
II |
段砂section sand |
≥99.0
|
≤0.10 |
≤1.00 |
≤0.10 |
≤0.05 |
|
细粉fine powder |
≥98.6 |
≤0.10 |
≤0.05 |
|||
致密电熔刚玉物理性能指标DenseFusedCorundum’s physical property indexes:
|
项目item |
指标index |
|
颜色color |
灰白gray |
|
晶型crystalline system |
6方晶型hexagon |
|
硬度hardness (莫氏)（mohs scale） |
≥9.0 |
|
熔点melting point (℃) |
2250 |
|
**使用温度maximum operated temperature(℃) |
1900 |
|
真密度real density（g/m³） |
≥3.90 |
|
线膨胀系数linear expansion coefficient（1600℃） |
7-9 |
