白刚玉是以**氧化铝粉为原料,在2050℃高温下熔炼而成,它具有纯度高、自锐性好、磨削时发热量小、耐酸碱、高温稳定性好、气孔率低等优点。
电熔白刚玉是生产中**不定型和定型耐火材料的主要原料,常用于钢包浇注料、铁沟料、耐火喷补料等不定型耐火制品;在定型耐材中,它主要用在刚玉砖、刚玉莫来石质匣钵、精炼用刚玉多孔塞砖、整体喷枪、炼钢连铸三大件、超高温工业窑炉内衬等刚玉制品。它又是磨料磨具行业**原料,主要用在砂轮磨具、抛光研磨行业,在军工、造船、玻璃、**、航天、光学仪器、核能等行业有广泛的前途。
Physical Properties |
Chemical composition (%) |
Size sands |
Powders |
|
Principle crystal phase:α-AL2O3 |
Al2O3 |
≥99.2 |
≥99.0 |
|
Crystal system :Hexahedron |
Na2O |
≤0.3 |
≤0.35 |
|
Color :White |
SiO2 |
≤0.1 |
≤0.15 |
|
True density:(g/cm3):≥3.95 |
Fe2O3 |
≤0.08 |
≤0.1 |
|
Packing density(g/cm3):1.75-1.95 |
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Mohs’ scale of hardness : 9 |
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Linear expansion Coefficient (1/℃): 8.3× 10-4 |
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Grain size sand |
F16,F20,F36,F46,F50,F60,F70,F80,F90,F100,F120,F150, F180,F220,F240 |
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Fine Powder(mesh) |
80 ,120 ,150,180,220,240 ,320…… |
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Section sand (mm) |
0-1,1-3,3-5,5-8,8-15,0-30,0-0.3…… |