... in iron and steel smelting, cement rotary kiln and gla Top-grade Electrofused SpinelOverview Spinel is a mineral composed of Mg-Al ... Black, etc. Spinel shows a hard glassy octahedral, granular and block. They can be founded in the igneous rock, granitic pegmatite ... smelting, cement rotary kiln and glass industry furnaces chaoyue supply top grade electrofused spinel