ELECTRICALLY fused from a mixture of bauxite,coal and iron borings.Itis brown, with great
hardness andtoughness.Bonded and coated abrasive products made of A are suitable for the
grinding of carbon stee1,malleable iron and hardened bronze,etc. It also can beused as
refractory matelria1,chemical filler,precision casting and ant-slip material,ctc.