Used as a deoxidizer in steelmaking to remove excess oxygen and improve metal quality. Enhances mechanical properties of cast iron by promoting graphite formation and reducing brittleness. Serves as a source of silicon in the production of silicon-based alloys and metallic silicon. Applied in the manufacturing of ferrous and non-ferrous alloys to control composition and improve performance. Utilized in the chemical industry as a reducing agent in the production of other metals. Also employed in the construction sector as an additive in concrete for special applications requiring increased density or radiation shielding.