75B ferrosilicon smelting general carbon steel

The core production process of ferrosilicon: Submerged arc furnace smelting. The mainstream production method of modern ferrosilicon is carbon thermal reduction smelting in submerged arc reduction electric furnaces (submerged arc furnaces). This process uses high-purity quartz stone (SiO2 > 99%) as the silicon source, coke (or charcoal, coal, petroleum coke, etc.) as the reducing agent and carbon source, and steel shavings or pellet ore as the iron source. When producing high-grade ferrosilicon (such as FeSi75), silica (SiO2) and a small amount of silicon steel shavings also need to be added. The main chemical reactions are: SiO2 + 2C -> Si + 2CO (the main reaction), and FeO + C -> Fe + CO (when iron oxide raw materials are used). The entire smelting process takes place continuously in a high-temperature (with the center temperature of the furnace chamber reaching 1800-2200°C), closed or semi-closed submerged arc furnace, and it is a high-energy-consuming industry. Raw materia…