High Alumina Brick

High alumina brick
properties:
alumina content in high alumina brick up from 48% to 80%.
excellent corrosion resistance to neutral slag and metal penetration resistance at high liquid temperature.
improved thermal shock and corrosion resistance at high temperature.
high density, high mechanical strength and good volume stability at high temperature.
Applications:
good for iron and steel making operation at the area of working zone in ladle and eaf roof.
for reheating furnace such as anchor brick and burner block.
transition and cooling zone of rotary cement kiln, lime shaft klin etc.
bottom and door foundry air furnace and side wall of aluminum refining melting furnace etc.
Item index
sk-35 sk-36 sk-37 sk-38 sk-40
al2o3,%, ≥48 ≥55 ≥65 ≥75 ≥80
fe2o3,%, ≤2.0 ≤2.0 ≤2.0 ≤2.0 ≤2.0
refractoriness,℃, ≥1750 ≥1770 ≥1790 ≥1790 ≥1790
0.2mpa refractoriness under load,℃ ≥1420 ≥1470 ≥1500 ≥1520 ≥1530
liner change on reheating     （1400℃,2h),% +0.1～-0.4
     1450℃ +0.1～-0.4 +0.1～-0.4 +0.1～-0.4 +0.1～-0.4
app.porosity,% ≤22 ≤22 ≤23 ≤23 ≤21
c.c.s.,mpa ≥39 ≥44 ≥49 ≥54 ≥65