Fume dust suppression during pouring of molten metal, and apparatus
AssigneeKawasaki Steel Corporation
InventorTetsuo Akiyoshi
Life of this patent
Estimating the term…
Abstract
Fume dust is prevented when molten metal is poured into a vessel, and water or water mist is sprayed into the vessel or onto the molten metal, creating a reduced level of oxygen concentration of about 12% by volume, preferably about 8% by volume, inside the vessel or at the molten metal surface.
Claims20
A method of limiting or preventing generation of fume dust during handling of molten metal, comprising the steps of generating steam by spraying water or water mist when molten metal is being poured into a vessel, and controlling the amount of steam introduced into said vessel or at a surface of said molten metal that the oxygen concentration inside said vessel or at said surface of said molten metal is reduced so as to essentially prevent creation or oxidation of fine molten metal particles in said vessel or at said molten metal surface.
An apparatus for limiting or preventing formation of fume dust in pouring molten metal into a vessel;
- said apparatus comprising a water supply and delivery system, a separate gas supply and delivery system, and a spray device connected for spraying water or water mist and aimed at the surface of said pouring molten metal flow as said molten metal is poured into said vessel, both said water supply and said separate gas supply being connected as feeds into said spray device to create a water mist.
Dependencies are inferred from the claim text.