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Fu Yang North Road, Yun He District, Cang Zhou City, Hebei Province, China.
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1、Chemical composition (composition of fused magnesia)
Ingredient | SiO2 | Al2O3 | Fe2O3 | CaO | MgO |
Specified value | ≤2.0 | ≤0.5 | ≤0.5 | ≤1.2 | ≥97.0 |
Measured value(%) | 1.30 | 0.37 | 0.43 | 0.90 | 97.0 |
2、Physical index1. Particle size distribution:Specified value: 40~325 mesh mixed particles -325 mesh: ≤15.00%
Measured value: 45~325 mesh mixed particles -325 mesh: 13.00%
2. Vibration density:
Specified value: ≥2.30g/cm3
Measured value: 2.38g/cm3
3. Flow rate: (natural flow value of 100g material in 4# Ford Cup)
Specified value: ≤45s
Found value: 45s
3、Electrical performance (straight tube SUS304 φ8 L heating = 450mm surface load 7W/cm2 dry burning until the leakage current value is stable)
Status | Normal | Tidal statu | Hot statu | |||
Project | Insulation resistance (ΜΩ) | Withstand voltage （V/0.5mA▪s） | Insulation resistance （ΜΩ） | Withstand voltage （V/0.5mA▪s） | Leakage current （μA） | Insulation resistance （ΜΩ） |
Specified value | ≥1000 | 2000 passed | ≥1000 | 2000 passed | ≤200 | ≥2 |
Measured value | ∞ | 2500 passed | Return to ∞ after soaking in the nozzle for 12 hours | 2500 passed | 180 | 2.8 |
∞ | 2500 passed | Return to ∞ after soaking in the nozzle for 12 hours | 2500 passed | 175 | 3.0 | |
4、Tube surface temperature
Specified value: ≥650℃
Found value: 710℃
