企業(yè)特殊行業(yè)經(jīng)營資質(zhì)信息公示
點擊圖片查看原圖電熔致密剛玉就是以工業(yè)氧化鋁為主要原料，在三相電弧爐內(nèi)使γ-AL2O3轉(zhuǎn)變?yōu)棣? AL2O3而成。γ-AL2O3轉(zhuǎn)變?yōu)棣?AL2O3是單向的致密剛玉，主晶相大于96%，氣孔率小于4%，轉(zhuǎn)化后的體積變化率大約縮小14%左右，因此致密剛玉具有良好的抗酸堿性能，在高溫下具有良好的耐磨、抗侵蝕及體積穩(wěn)定性。
致密剛玉作為**耐火材料，廣泛應(yīng)用于冶金、石化、建材、高溫陶瓷、機械等行業(yè)，特別是在陶瓷輥道棒、連鑄三大件、大型出鐵溝等方面有廣泛的用途。
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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.
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致密電熔剛玉理化指標Dense Fused Corundum’sphysiochemicalindexes:
|
規(guī)格specifications |
主要化學成分main chemical component % |
磁性物magnetic material content% |
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|
Al2O3 |
Fe2O3 |
SiO2 |
Na2O |
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|
I |
段砂section sand |
≥98.3 |
≤0.15 |
≤1.00 |
≤0.10 |
≤0.15 |
|
細粉fine powder |
≥987.8 |
≤0.30 |
≤0.10 |
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|
II |
段砂section sand |
≥99.0 ? |
≤0.10 |
≤1.00 |
≤0.10 |
≤0.05 |
|
細粉fine powder |
≥98.6 |
≤0.10 |
≤0.05 |
|||
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致密電熔剛玉物理性能指標DenseFusedCorundum’s physical property indexes:
|
項目item |
指標index |
|
顏色color |
灰白gray |
|
晶型crystalline system |
6方晶型hexagon |
|
硬度hardness (莫氏)（mohs scale） |
≥9.0 |
|
熔點melting point (℃) |
2250 |
|
**使用溫度maximum operated temperature(℃) |
1900 |
|
真密度real density（g/m3） |
≥3.90 |
|
線膨脹系數(shù)linear expansion coefficient（1600℃） |
7-9 |
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