 |
|
 filtering
ball and sand
Filter ball and sand can be widely used as filtering media in
the single-layer and multi-layer polluted water treatment tank in
environmental protection field.
Having stable performance in high porosity, corrosion resistance,
high temperature resistance, high specific surface area outside
and inside to contain impurities, it can remove the impurity which
cause the defect product to improve the quality of castings dramatically,
so foamed ceramics is a essential filtering in steel and iron casting
molding industry. |
Specification of Filter Ball
and Sand
(mm):
0.5-2, 2-4, 4-8,
8-16, 16-32, 32-80
|
| Type and Application of
Filter Ball and Sand |
| Item |
Index |
Remark |
| Acid resistance |
99.5% |
soaked in 30 % HCl acid and 50 % H2SO4 solution for two weeks
|
| Alkali resistance |
82.5% |
soaked in 50 % NaOH and KOH for two weeks |
| Compression strength |
2800-3500kg/cm2 |
Los Angeles standard |
| Hardness |
7 grade |
Mohs scale |
| Abrasion |
0.15-0.2 |
|
| Temperature |
- |
|
| Thermal conductivity |
- |
|
| Specific heat |
- |
|
| Specific gravity |
2.3g/cm3 |
|
| Bulk density |
1.4 g/cm3-1.9 g/cm3 |
|
| Water absorption |
0.5-2.2% |
|
| Cracked rate |
0.75% |
|
| Free volume |
28.6% |
|
|
| |
| Chemical Composition |
| Composition |
Content%
|
|
SiO2
|
68-74
|
|
Fe2O3
|
-
|
|
MgO
|
-
|
|
AI2O3
|
18-24
|
|
CaO
|
0.5
|
|
KO2Na2O
|
-
|
|
Rare Earth
|
a Little
|
|
| |
|
