Ferrosilicon is an iron alloy composed of iron and silicon. Nowadays, ferrosilicon has a wide range of applications. Ferrosilicon can also be used as an alloying element additive and is widely used in low-alloy structural steel, spring steel, bearing steel, heat-resistant steel and electrical silicon steel. Among them, ferrosilicon is often used as a reducing agent in ferroalloy production and chemical industry. However, many people only understand the uses of ferrosilicon and do not understand the smelting of ferrosilicon and the problems that may be found during smelting. In order to deepen everyone’s understanding of ferrosilicon, ferrosilicon suppliers will briefly analyze the reasons for the low carbon content in ferrosilicon.
The main reason why the smelted ferrosilicon has a lower carbon content is that when manufacturers smelt ferrosilicon, they use coke as a reducing agent, so that the self-baked electrodes that are easier to carburize use coke bricks to build the tapholes and Flow iron trough, sometimes use graphite powder to coat the ingot mold, use a carbon sample spoon to take liquid samples, etc. In short, during the smelting of ferrosilicon from the reaction in the furnace until the iron is tapped, there are obviously many opportunities for contact with carbon during the pouring process. The higher the silicon content in ferrosilicon, the lower its carbon content. When the silicon content in ferrosilicon is greater than about 30%, most of the carbon in ferrosilicon exists in the state of silicon carbide (SiC). Silicon carbide is easily oxidized and reduced by silicon dioxide or silicon monoxide in the crucible. Silicon carbide has very little solubility in ferrosilicon, especially when the temperature is low, and it is easy to precipitate and float. Therefore, the silicon carbide remaining in ferrosilicon is very low, so the carbon content of ferrosilicon is very low.
Post time: Jul-29-2024
