铬刚玉砖是以α-Al2O3为原料,加入适量的氧化铬粉和铬刚玉熟料细粉,经高温成型烧制而成。主要矿物成分为α-Al2O3-Cr2O3 固溶体,次要矿物由少量复合尖晶石(或无复合尖晶石)组成,氧化铬含量为耐火砖的 1% 至 30%。
熔融铬刚玉砖 | KR-G92-Cr | |
---|---|---|
化学成分(%) | Al2O3 | ≥92 |
二氧化硅 | ≤1.0 | |
Fe2O3 | ≤0.3 | |
CaO | ≤1.2 | |
Na2O | - | |
锆石 | ≥3 | |
Cr2O3 | ≥3 | |
表观孔隙率(%) | ≤15 | |
体积密度(g/cm3) | ≥3.25 | |
压力强度(Mpa) | ≥180 | |
高温抗折强度(1250℃ Mpa) | ≥9.5 | |
折射率(℃) | ≥1900 | |
荷载软化温度(0.2 Mpa T0.6 ℃) | ≥1680 | |
燃烧线变化率 % (1500℃×2h) | ≤±1.2 |
1.High refractoriness 2.Load Softening Temperature 3.Excellent thermal shock resistance 4.Excellent slag resistance 5.Excellent slag resistance 6.Low Thermal Conductivity
1.Metallurgical industry: steelmaking furnace, refining furnace, etc.; 2.Glass industry: glass kiln; 3.Ceramic industry: high temperature kiln, which can resist high temperature erosion and scouring and increase the service life of the furnace.