... above 89% 4) price is USD280-500/ton 1) Diatomite filter for beverage2) One of the main products of our company ... .SPECIFICATION:PHYSICAL PROPERTIESCHEMICAL PROPERTIESGradeFood GradeSiO2≥89%ColorWhiteAl2O3≤4%DescriptionFlux Calcined Filter AidFe2O3≤1.5%Specific Gravity2.3 g/cm³CaO≤0 ... ,Water Treatment,Swimming Pool Water Treatment, Other general use. Diatomite filter for beverage