Rapid cold steel melting method for RH furnace

The invention discloses a rapid cold steel melting method for an RH furnace. The rapid cold steel melting method for the RH furnace mainly comprises the following steps: for nitrogen-containing steel types and steel types without nitrogen fixation elements such as chromium, vanadium, sulfur and titanium alloy components, increasing nitrogen in molten steel by adopting a nitrogen bottom blowing mode in the LF refining process, introducing circulation gas in the RH refining process, and after high-vacuum treatment, carrying out heat treatment on the molten steel to obtain the cold steel. Sampling, testing and adjusting the nitrogen content in the molten steel, so that the nitrogen content in the molten steel is controlled in a process requirement range, and the cold steel in the RH vacuum tank is washed and recycled by utilizing the nitrogen-containing molten steel. According to the method, the cold steel in the vacuum tank of the RH furnace can be quickly melted and removed, the time for melting the cold steel