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指 标Indicator
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氧化铝空心球制品Alumina
hollow sphere products
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Al2O3(%)
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90-98.5
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Fe2O3 (%)≤
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0.15
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体积密度Density g/cm3
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1.1-1.6
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显气孔率apparent
porosity (%)
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55-60
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常温耐压强度cold
crushing strengthMPa≥
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19
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常温抗折强度Cold bending
strengthMPa≥
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20
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高温抗折强度high
temperature bending strengthMPa≥
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25
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使用温度operating
temperature (℃)
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1700-1900
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荷重软化温度refractoriness
under load (℃)（0.2Mpa,0.6%）
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1700-1900
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热震稳定性thermal shock
resistance (水冷)次/850℃ ≥
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25
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热膨胀系数thermal
expansivity 1/℃×10-6 (1300)
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8.6
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导热系数Thermal
Conductivity (w/m.k)
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0.6-1.0
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重烧线变化率Reburning
line change rate 在()℃×8小时 ≤
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± 0.2 (1700)
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颗粒尺寸particle size
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Ф0.2-5mm
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特点characteristic
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该产品具有直接接触火焰，体轻、耐压强度高、隔热性能好，节约能源。This product
can come into direct contact with flames. It is lightweight, has high
pressure resistance, excellent heat insulation performance and can save
energy.
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用途application
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适用于裂介炉、热风炉、加热炉、隧道窑、推板窑、坩埚炉及各种电炉、电窑内衬，广泛应用于冶金，轻工，化工，陶瓷，玻璃，电子等行业。Suitable for refractory linings of blast
furnaces, hot blast stoves, heating furnaces, tunnel kilns, pusher kilns,
crucible furnaces and various electric furnaces and electric kilns. Widely
used in industries such as metallurgy, light industry, chemical industry,
ceramics, glass, and electronics.
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