All Grades of Make Pumice Stone

Specifications 1.Packing:25/50kg/1ton bags

2.Colour:gray white

3.Size:0-2000mesh

4.USD140-250/MT

5.Delivery:14-20 days

Size:1-3mm,3-5mm,5-7mm,7-10mm,5-10mm;1-2cm,2-4cm,3-5cm,4-8cm,5-10cm,etc   1.Chemical Composition:  

SiO2	CaO	MgO	Fe2O3	FeO	Al2O3	TiO2	K2O	Na2O
73.32%	0.73%	0.20%	1.34%	1.12%	13.24%	0.10%	4.33%	3.58%

   2.Properties: 1.It has lots of holes. 2.Weight is very light. 3.Perfect intensity 4.Heat preservation and thermal insulation, noice insulation. 5.Fireproofing 6.Corrosion and acid-base resisting 7.Non-pollution and no radioactivity, environment protection   3.Physical properties:

Volume-weight(kg/m3)	430-870
Water absorption	11.7-17.03%
Loose volume-weight(kg/m3)	520
Cylinder pressure strength	1.218Mpa
Moisture	1%
Mechanical Intensity	5.08Mpa
Heat conductivity coefficient w/(m.k)	0.326
Soften coefficient	0.84
Apparent density	Kg/m 3 640-860/(390*240*190)
Hollow ratio(%)	48/(390 *240 *190)

  4.Usage: Lava is used in washing clothes, construction,irrigation works, grinding, filter material, barbecue charcoal, garden scene, soilless culture, etc. It is also a perfect material used in hot stone therapy, which is good to Promote the body's metabolism.       Alibaba Certificate:     My Mobile: 86 13722996216