Why can ladle blowing argon effectively reduce the hydrogen content in steel? Through the bottom of the ladle breathable brick into the molten steel into the argon gas is countless rising bubbles flow through the molten steel, each argon bubble is quite a small vacuum chamber, indoor hydrogen partial pressure is extremely low, when the hydrogen in the molten steel meets the argon bubble, hydrogen is attached to its surface and diffuses into the argon bubble, and finally hydrogen enters it, with the argon bubble floats to the surface of the molten steel, into the atmosphere is washed away, this is the simple principle of ladle blowing argon to remove hydrogen.