黑刚玉
黑刚玉是于电弧炉中，将铝矾土熔炼而制得的一种以a-AL2O3和铁尖晶石为主矿相的灰黑色结晶体，具有韧性高、耐高温、热太性能稳定的特点。磨料组成基本粒集中，切削力强，耐磨性好，工效高。主要用于金属制品、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、砂布的新颖磨料，用本产品抛光比其它磨料工效提高2.5倍,光洁度提高1.5倍,特别是磨削抛光不锈钢制品效果更佳。
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，耐磨性好，工效高。是磨削抛光、喷砂不锈钢制品的最理想产品。 
 

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 as main ore in the electric arc furnace by smelting the bauxite. It has characteristics of moderate hardness, high toughness, high temperature resistance, and stable thermal stability. It is mainly suitable for free grinding, such as coarse grinding before electroplating products, mainly for polishing and sandblasting of stainless steel, fabricated metal products.

本厂可按客户要求生产加工各种规格黑刚玉、粒度可做精砂、段砂、P砂、F砂、砂纸专用黑刚玉、欢迎新老客户来电洽谈。特种精密铸造砂（S2砂）有称精黑刚玉，具有耐火度高，热膨胀小.导热能力强.发气量低.，热化学稳定性好等特点。用于玻璃.五金.喷砂..打砂.研磨抛光。各种铸造钢件的型砂芯砂.取代铬铁矿砂和锆砂，.解决铸造粘砂最为理想.

黑刚玉主要用途：耐材、抛光、喷砂、磨料、研磨制品、水处理等等。