Oct 05
Refractory Grade Chrome ore Lumps, Cr2O3 = 50% min, typ. 53-54% SiO2 = 3.5% max, typ 2.2% Cr:Fe = 3.0:1 min, typ 3.24:1 MgO = 20% max FeO = 16% max CaO = 0.8% max Al2O3 = 13% max P = 0.007% max S = 0.05% max Moisture: 2% max Size: 0-10mm = 10% max 10 …
Oct 05
1- Refractory Grade Chrome Ore Concentrates A) Silica Less than 1% Cr2O3 = 57% min, typ. 59% SiO2 = 0.95% max, typ 0.80% Cr:Fe = 3.2:1 min, typ 3.4:1 MgO = 20% max Fe2O3 = 17% max CaO = 0.50% max Al2O3 = 13% max P = 0.007% max S = 0.05% max Moisture: 0.5% …
Oct 02
Chromium was first isolated as a metal in 1798, but it was not until 1818 that it was put to regular use in pigments for the manufacturing of wallpaper. With the development of the world steel industry during the 20th century, chromium has assumed a considerable importance as an alloying element. Chromium usage may be …