flint pebble as milling medium

1.Product:Pebbles/Man made pebbles/Flint pebbles/Silica pebbles/Cobblestone/Natural pebbles2.Size:2-4cm,4-6cm,6-8cm,8-10cm,10-12cm,12-15cm3.Packing:in bulk/ton bags&pallets/ton bags4.Use:grind ceramic material in ball mill5.Spec. SiO299.13%Al2O30.36%Fe2O3 0.18%MgO 0.04%CaO0.09%6.InspectationReport INSPECTATION PRODUCTFLINT PEBBLESIZE OF PRODUCT8-10CMSTANDARD ABRASION RATE OF SILICA PEBBLE< 1.5ACTUAL ABRASION RATE OF SILICA PEBBLE1.35APPEARANCE OF SILICA PEBBLEROUND(ELLIPSE)COLOUR OF PRODUCT AFTER BURNINGGRAY AND WHITE7.Physical dataSpecific weight : 2,66 Hardness(mohs):8Porosity: 0,38 %Apparent density :1,608.to produce 1,000 kg of ceramic body,between 4 and 5 kg of pebbles will be necessary
flint pebble as milling medium