The reduction reaction of silicon i

The reduction reaction of silicon in the blast furnace mainly occurs in the drip zone, where SiO2 rises with the gas, comes into contact with slag iron and is reduced, gradually progressing from SiO2 → SiO → Si. The silicon content in the furnace bosh significantly increases, and the silicon content in the lower part of the furnace bosh is higher than that of the finished pig iron. After entering the slag layer, the silicon content gradually decreases. Due to oxidation and coupling reactions of Fe O, Mg O, and [Si] in the slag layer, the silicon content gradually decreases from the tuyere area to the iron mouth area. Reducing the silicon content of blast furnace hot metal mainly starts from controlling the ash content of coke, silicon absorption of hot metal, and enhancing the desilication reaction below the tuyere. Multiple measures are taken simultaneously to strengthen production control, reduce silicon content, and save energy and efficiency.