natural pebbles

natural pebbles
1)grind medium
2)good hardness
3)high silica
4)wearable5)competitive price

1.Product:Pebbles/Cobblestone/Natural pebbles

2.Size:small,middle,big

3.Packing:in bulk/ton bags&pallets/ton bags

4.Use:grind ceramic material in ball mill

5.Spec.                                                                                                  

SiO2	99.13%
Al2O3	0.36%
Fe2O3	0.18%
MgO	0.04%
CaO	0.09%

6.Inspectation Report 

INSPECTATION PRODUCT	FLINT PEBBLE
SIZE OF PRODUCT	8-10CM
STANDARD ABRASION RATE OF SILICA PEBBLE	< 1.5
ACTUAL ABRASION RATE OF SILICA PEBBLE	1.35
APPEARANCE OF SILICA PEBBLE	ROUND(ELLIPSE)
COLOUR OF PRODUCT AFTER BURNING	GRAY AND WHITE

7.Physical data

Specific weight :            2,66

Hardness(mohs):           8

Porosity :                      0,38 %

Apparent density :         1,60

8.to produce 1,000 kg of ceramic body,between 4 and 5 kg of pebbles will be necessary