... component of aluminium alloys, in die-casting (alloyed with zinc), to remove sulfur in the production of iron and steel ... other electronic components. In magnesium compoundsMagnesium compounds, primarily magnesium oxide (MgO), are used as a refractory material in furnace ... iron, steel, nonferrous metals, glass and cement. Magnesium oxide and other magnesium compounds are also used in the agricultural ...