MEANS FOR GAS-FLUSHING METAL MELTS

• US 3,633,898 A
• Filed: 06/06/1969
• Issued: 01/11/1972
• Est. Priority Date: 06/06/1969
• Status: Expired due to Term

• Current Assignee: Erik Anders Ake Josefsson, Lars Gosta Almhed
• Original Assignee: Erik Anders Ake Josefsson, Lars Gosta Almhed
• Inventors: Josefsson, Erik Anders Ake, Almhed, Lars Gosta
• Primary Examiner(s): Dost, Gerald A.
• Application Number:
  US04/831,283
• Time in Patent Office: 949 Days
• Field of Search: 266/34R,34A,34T,34PP,36R 75/59,60
• US Class Current: 266/220
• CPC Class Codes: C21C 7/0037 by injecting powdered material
• CPC Class Codes: C21C 7/0685 of stainless steel
• CPC Class Codes: F27B 3/065 tiltable
• CPC Class Codes: F27D 2003/0038 comprising shakers
• CPC Class Codes: F27D 27/00 Stirring devices for molten material F27D3/14 takes precedence

Abstract

A molten metal in a container is treated with a gas. The gas is supplied through an opening, preferably a slit-shaped opening, in the bottom or lower wall portion of the container, thus forming bubbles which ascend in the molten metal. The container is rotated or shaken or vibrated so that a flow is created in the molten metal relative to the wall of the container. The molten metal thus passing by the gas supply opening removes the gas bubbles from the gas supply opening before the bubbles have had time to grow to the size they would have reached in stagnant molten metal.

Claims

2. Apparatus, as set forth in claim 1, wherein the width of said elongated gas-distributing slit is in the order of magnitude of 1 mm.

3. Apparatus, as set forth in claim 1, wherein two lining elements being arranged in the bottom of said ladle and being spaced from each other for forming said gas-distributing slit.

4. Apparatus, as set forth in claim 1, wherein at least one porous insert of ceramic material is arranged between said two lining elements in the bottom of said ladle for forming said gas-distributing slit.

5. Apparatus, as set forth in claim 1, wherein a plurality of said slits extend substantially radially in the bottom lining of said container.

6. An apparatus for treating a molten metal with a gas comprises a container having a substantially circular cross section, said container having an opening in the upper portion thereof for the supply of molten metal into said container, the bottom wall of said container having at least one elongated slitlike opening therein with the slitlike opening extending radially relative to the axis of said container for the supplying gas thereto, means for shaking said container so as to effect a motion of the molten metal relative to the walls of said container and thus producing a flow of molten metal past said gas supply opening, and means for tilting the container so as to discharge the molten metal after having been treated with the gas.

7. An apparatus as claimed in claim 6, in which the means for shaking the container is arranged to give the container a circular motion.