Process for melting 25Cr2Ni4MoV rotor steel

The invention discloses a process for melting a 25Cr2Ni4MoV rotor steel. The process particularly comprises the following steps: (1) selecting the raw materials; (2) performing primary smelting in an electric-arc furnace; (3) refining by an LF furnace; (4) performing carbon deoxidization; (5) pouring. When preparing the materials, the high-quality steel scrap and the stub bar are selected, the harmful residual element contents As, Sn, Sb, Cu, Al in the steel solution are strictly controlled to met the process requirement; the operation of dominant slag and steel is processed during electric furnace tapping so that the rephosphorization is effectively prevented; the deoxidization method is a vacuum carbon deoxidization process, so that the molten steel non-metallic inclusion and the gas content are effectively reduced and the purity of the molten steel is greatly increased.