Electrofused Spinel 1.Great hardness; harder than garnet 2.Widely used in iron and steel smelting, cement rotary kiln and gla Top-grade Electrofused SpinelOverview Spinel is a mineral composed of Mg-Al oxides, as containing magnesium, iron, zinc, manganese, etc. elements, they can be divided into many forms, such as aluminum spinel, iron spinel, zinc spinel, manganese spinel, chrome spinel and so ...