... —Refractory gradeGroup Size0-1mm1-3mm3-5mm5-8mm990.350.7—Fine Powder-180mesh-200mesh-240mesh-320mesh980.350.7—colorgreenHardness(mohs)9.15Melting ... owned the export right, such as Ferro Silicon, Silicon Carbide, Silico Manganese, Rareearth Ferro Silicon Alloy, Ferro Silicon Magnesium Alloy, quality nodulizing agent, inoculant and coke ...