Production process for accurately controlling aluminum-nitrogen ratio of 18CrNiMo7-6 gear steel smelted by ecological electric furnace

The invention discloses a production process for accurately controlling the aluminum-nitrogen ratio of 18CrNiMo7-6 gear steel smelted by an ecological electric furnace, which adopts the production process flows of ecological electric furnace smelting, LF (ladle furnace) refining, RH (Ruhrstahl Heraeus) vacuum degassing and bloom continuous casting. Key control points of all production links are controlled in the whole process through a series of measures such as tapping end point control, slag discharging control, LF white slag effect and time optimization, bottom blowing flow control and vacuum time control, the yield of aluminum and the nitrogen content in the smelting process can be stabilized without additionally invested funds and production equipment, then the aluminum-nitrogen ratio in steel is accurately controlled to be 2.5-2.8, and the production cost is reduced. Grain growth is prevented, the possibility that workpieces are scrapped in the forging process due to the crystal grains is greatly reduce