Quartz Sand Filtration technical parameter: Analysis project unit Result Analysis project unit Result Ash Content % 0.05 Acid Solubility % 0.02 Density g/cm3 2.66 tolerance of acidity % 98 Attrition Loss % 0.03 Porosity % 43 broken rate % 0.35 Bulk Density g/cm3 1.75 SiO2 % 99.3 Hardness degree 7.5