... #,1000#,1200#,1500# 2000#,2500#,3000#,4000#Refractory grade:1-0mm,3-1mm,5-3mm,5-8mm -200mesh,-240mesh,-320mesh PurposeSpecificationChemical ... .280.090.0021180-220990.080.300.100.0018micropowder240-400098.50.10.400.15—Refractory gradeGroup Size0-1mm1-3mm3-5mm5-8mm990 ... .10.350.3—Fine Powder-180mesh-200mesh-240mesh-320mesh990.10.350.3—colorwhite Hardness(mohs)9 ...