Apparatus for treating molten metal

An apparatus for treating a molten metal by releasing a treating gas into the molten metal in the form of finely divided bubbles and dispersing the bubbles throughout the entire body of molten metal to remove dissolved harmful elements and nonmetallic inclusions from the molten metal, the apparatus comprising:

• a vertical post rotatable about its own axis,
• a treating container disposed at one side of the post and having an opening at its upper end for containing the molten metal,
• a horizontal suspending arm mounted at its base end on the post upwardly and downwardly movable and rotatable with the post,
• means for moving the suspending arm upward and downward along the post,
• a vertical tube attached to the forward end of the suspending arm,
• a drive shaft inserted through the vertical tube and having a treating gas channel internally extending therethrough longitudinally,
• a vertical rotary shaft connected to the lower end of the drive shaft and having a treating gas channel internally extending therethrough longitudinally in communication with the gas channel of the drive shaft,
• a treating gas supply pipe connected to the upper end of the drive shaft by a rotary joint,
• means for driving the drive shaft,
• a bubble releasing-dispersing rotor provided at the lower end of the rotary shaft and having in its bottom surface a treating gas outlet in communication with the gas channel of the rotary shaft, the rotor being movable into and out of the container through the opening,
• a horizontal suspending bar fixed to the vertical tube,
• at least one baffle suspended from the suspending bar and movable along the suspending bar toward or away from the vertical tube for preventing eddying and waving, the baffle being movable into and out of the container through the opening, and
• a fixing means for adjustably fixing said baffle to the suspending bar.

An apparatus for treating a molten metal by releasing a treating gas into the molten metal in the form of a finely divided bubbles and dispersing the bubbles throughout the entire body of molten metal to remove dissolved harmful elements and nonmetallic inclusions from the molten metal, the apparatus comprisng:

• a vertical post,
• a plurality of treating containers arranged around the post for placing the molten metal therein, each of the containers having an opening at its upper end,
• suspending means mounted on the post, the suspending means being movable upward and downward along the post and rotatable about the axis of the post,
• a vertical tube provided for the suspending means,
• a vertical rotary shaft inserted through the vertical tube and having a treating gas channel internally extending therethrough longitudinally,
• a bubble releasing-dispersing rotor provided at the lower end of the rotary shaft and having in its bottom surface a treating gas outlet in communication with the gas channel of the rotary shaft, the rotor being movable into and out of each of the containers through the opening,
• a horizontal suspending bar fixed to the vertical tube,
• at least one baffle suspended from the suspending bar and movable along the suspending bar and into and out of each of the containers through the opening for preventing eddying and waving, and
• a fixing means for adjustably fixing said baffle to the suspending bar.