用于自由研磨，如制品电镀前的打磨工粗磨，主要用于不锈钢，金属制品，光学玻璃，竹木制品的抛光和喷砂，又是制造树脂砂轮，切割片，纱布的新颖磨料。本公司黑刚玉黑刚玉磨料基本粒集中，切削力强，韧性大，刚柔相济，*性好，工效高。是磨削抛光、喷砂不锈钢制品的****理想产品。

黑刚玉理化指标:

黑刚玉物理性能指标：

黑刚玉又名低铝刚玉，在棕刚玉生产中的一个新型派生品种。是于电弧炉中，将铝矾土熔炼而制得的一种以 α- Al2O3 和铁尖晶石为主矿相的灰黑色结晶体，其特点是Al2O3 含量较低，并有一定量的Fe2O3（10%左右）存在，因而具有硬底适中、韧性高、耐高温、热态性能温定的特点。多用于自由研磨，如制品电镀前的打磨工粗磨，主要用于不锈钢，金属制品，光学玻璃，竹木制品的抛光和喷砂，又是制造树脂砂轮，切割片，纱布的新颖磨料。本公司黑刚玉黑刚玉磨料基本粒集中，切削力强，韧性大，刚柔相济，*性好，工效高。是磨削抛光、喷砂不锈钢制品的****理想产品 。

Black corundum is also known as low aluminum corundum. It is also a new type product of polishing material, and it is a dark gray crystal body made α-Al2O3 and ferropicotite a*ain ore in the electric arc furnace by *elting the bauxite. It has characteristics of moderate hardness, high toughness, high temperature resistance, and stable thermal stability. It i*ainly suitable for free grinding, such as coarse grinding before electroplating product*ainly for polishing and sandblasting of stainless steel, fabricated metal products.

Black corundum physical and chemical indicators:

Black corundum physical performance indicators: