Method for controlling hydrogen content of molten steel

The invention belongs to the technical field of steel production, and relates to a method for controlling the hydrogen content of molten steel, which adopts a process route of converter steelmaking, CAS refining and continuous casting, strictly controls the converter smelting slagging process by controlling the moisture, storage and the like of auxiliary materials, controls the tapping slag washing process, and controls the use of waste steel, so that the hydrogen content of the molten steel is controlled. The hydrogen content of the molten steel is stably controlled to be smaller than or equal to 4.5 ppm, operation is easy, implementation is easy, the smelting process can be effectively shortened, the production efficiency is improved, and the production cost is reduced. The hydrogen content of the molten steel in the BC process path is reduced, the hydrogen control pressure of the molten steel in the LF in the BLC path is reduced, the steel billet hydrogen high lower line proportion is effectively reduced,