The ceramic sand filters are doped with rare earth element and processed by mix, shaping and sintering. Ceramic sand filters have great advantages of strong filtering adsorption ability, high strength, low resistance, corrosion resistance, non-toxic, easy to regenerate and long service life etc. 2.Chemical composition Item AL2O3 SiO2 Fe2O3 MgO CaO K2O+Na2O Rare Elements Value 18-25% 68-74% ≤1.0% ≤0.7% ≤0.5% ≤4% Micro component
Item
AL2O3
SiO2
Fe2O3
MgO
CaO
K2O+Na2O
Rare Elements
Value
18-25%
68-74%
≤1.0%
≤0.7%
≤0.5%
≤4%
Micro component
Index
Particle Size, mm
0.5~3.0
Water permeability, t/m2.h
2~3
Compressive strength, N
30~150
Gas permeability, m3/m2h.h
1500~2000
Abrasion resistance, %
≤0.5
Bulk density, g/ml
1.1~1.5
Acid resistance, %
>98
Free volume, %
40~45
Alkali resistance, %
>82
Thermal resistance, °C
≥1000
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