Description:
16-20mm red pumice stone for filter material1.Natural lava stones
2.Red and black colour
3.USD 80-200
1.Chemical Composition:
SiO2 | CaO | MgO | Fe2O3 | FeO | Al2O3 | TiO2 | K2O | Na2O |
53.82% | 8.36% | 2.46% | 9.08% | 1.12% | 16.89% | 0.06% | 2.30% | 2.55% |
2.Properties:
1.It has lots of holes, both small and bigones.
2.Weight is very light.
3.Perfect intensity
4.Heat preservation and thermal insulation, noiceinsulation.
5.Fireproofing
6.Corrosion and acid-base resisting
7.Non-pollution and no radioactivity, environmentprotection
3.Physical properties:
Volume-weight(kg/m3) | 430-870 |
Water absorption | 11.7-17.03% |
Loosevolume-weight(kg/m3) | 520 |
Cylinder pressurestrength | 1.218Mpa |
Moisture | 1% |
Mechanical Intensity | 5.08Mpa |
Heat conductivity coefficientw/(m.k) | 0.326 |
Soften coefficient | 0.84 |
Apparent density | Kg/m 3640-860/(390*240*190) |
Hollow ratio(%) | 48/(390 *240 *190) |
4.Usage:
Lavais used in construction, irrigation works, grinding, filtermaterial, barbecue charcoal, garden scene, soilless culture, etc.It is also a perfect material used in hot stone therapy, which isgood to Promote the body''s metabolism.
