BFA with medium bulk density(can be washed as your requirement) Brown Fused Alumina with medium bulk density is crashed by ball mill machine. The bulk density is lower than the Barmac grains. It is characterized by its high grinding ability,strong self-sharpening, good toughness, ultra-low content of the magnetic materials. Physical Properties Color: Dark Brown ; Crystal Form: Alpha-alumina trigonal system; Hardness: 9.0 Mohs scale; Melting Temperature: About 2050 ℃; Maximum Use Temperature: 1800℃; True Density(g/cm3): ≥3.90; Magnetic Material : 0.01%