Method for smelting low-phosphorus steel by electric furnace under low molten iron proportion condition

The invention discloses a method for smelting low-phosphorus steel by an electric furnace under a low molten iron proportion condition. The method is characterized by realizing the purposes of smelting the low-phosphorus steel by the electric furnace under the low motel iron proportion condition through strictly control of the oxygen supply, power transmission and material feeding in the electricfurnace smelting process. The method specifically comprises the following steps that the proportion of molten iron entering the furnace is controlled to be 20-40%, waste steel is added into the furnace through a material basket at one time, and the molten iron is added from a furnace door opening through a molten iron blending trolley in the power transmission process; the oxygen flow of an RCB oxygen lance is reasonably adjusted, so that the power transmission time is dynamically controlled; and through cooperation with an automatic feeding system, lime is added into the furnace in batches, and other operation is car