Alloy Of Iron And Vanadium
Ferrovanadium is a product prepared by using a reducing agent to reduce vanadium-containing raw materials (V2O3 and V2O5) into metallic vanadium at high temperatures and melting it in molten iron. Silicon and aluminum are commonly used reducing agents for smelting ferrovanadium. Using silicon as a reducing agent to smelt fervana requires an external electric heat source. Because smelting is performed in an electric arc furnace, it is called the electrosilicothermal method.
Ferro Vanadium
Two important links must be grasped to produce low-phosphorus ferrovanadium by the electro-silicon method: 1) raw material control, 2) smelting control. Like other ferroalloy smelting processes, electric silicon smelting is also an electric furnace reduction smelting process. The principle of smelting dephosphorization is generally oxidative dephosphorization and reductive dephosphorization. The former uses strong alkaline slag with large phosphorus capacity to dephosphorize it, while the latter uses strong reducing elements (such as Ca, Mg, etc.) to dephosphorize.
However, research shows that ferrovanadium cannot effectively utilize oxidative dephosphorization and reductive dephosphorization in the smelting process to produce low-phosphorus ferrovanadium. Therefore, the only effective control condition for the production of low-phosphorus ferrovanadium by electrosilicothermal method when the concentrate is fed into the furnace is to control the raw and auxiliary materials. The P content in the material meets the low phosphorus requirements.
Ferromolybdenum Block
Secondly, smelting operations will also have an impact on low phosphorus. During smelting, a large amount of phosphorus in the refractory material enters the molten iron, which will cause the phosphorus content to be high. It must be controlled below 0.05%. It requires: shortening the smelting time of a single furnace, smelting at low temperature, and protecting the furnace with slag splashing. This can reduce the burning loss of the furnace lining, reduce the P in the slag entering the molten iron, and reduce the phosphorus content.
