... -70mm, 20-70 with same price, Alumina pebbles, used in ceramic tile, cement, chemical, mineral 95% :Advantages:The products are ... and various powdered ore. They are using ceramics, cements, paints, refractory, inorganic mineral powders and other materials to form. And the ... purity and improve the stability of grinded materials especially the ceramic glaze.2. High density: the high density, high hardness ...