黑刚玉砂(又名底铝刚玉砂,铁砂粉)是一种新型抛光材料.以三水型和一水型铝樊土为原料经电弧高温冶炼冷却加工而成.黑刚玉磨料基本粒集中,切削力强,任性大,刚柔相济,耐磨性好,工效高.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,砂布的新颖磨料.Blackaluminumoxiddeabrsasivesisanewtypeabrasivematerialforpolishingvariousmetaliselectricalfusedinanarcfurnacefromaluminumoxideasrawaluminumoxideabrasiveisfeaturedwithhighrongtanacity,goodself-sharpening,bettercohesiseness,higherdurability,lessheatgeneratedingrindingandgivingthemetalworkshighfinish,lesspowerweakenedinismostlyusedingrindingandpolishingstainlesssteel,metalworks,opticalglass,bambooorarticles.anditisalsothenewgrindingmaterialofproducingcolophonygrindingwheels,slice,andemerycloth.)