Calcium-silicon alloy is a binary alloy of silicon and calcium, smelted from silica, lime, and coke at a high temperature of 1500-1800℃. Its main components are silicon and calcium, with impurities such as iron and aluminum. In the steel industry, this alloy is used as a deoxidizer and desulfurizer, and in the cast iron industry as an inoculant. Its deoxidation products are easily removed, improving steel properties. Production processes include the electrocarbothermic process, the electrosilicon thermoelectric process, and the electrolytic process. The layered feeding method, through step-by-step smelting, can increase the calcium recovery rate to 55%-75% and extend the smelting cycle to more than one year.
Silicon-calcium binary alloys belong to the category of ferroalloys. Their main components are silicon and calcium, and they also contain varying amounts of impurities such as iron, aluminum, carbon, sulfur, and phosphorus. In the steel industry, they are used as calcium additives, deoxidizers, desulfurizers, and modifiers for non-metallic inclusions. In the cast iron industry, they are used as inoculants and modifiers.
