Method for slag removal during metal processing
OwnerLarry J Eppsinventor
Life of this patent
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Abstract
A method (110) for removing a quantity of slag (24) from hot metal (6) in a ladle (2) during a process of metal purification such as steelmaking using an improved skimmer paddle (100) having a system of internal piping (60) that at one end is attached to a source of gas and at a second end terminates into one or more ports (64). The improved skimmer (100) is moved along a top surface (6a) of the hot metal, though the quantity of slag, and predetermined flows of gas are forced into the piping system and expelled through the port or ports (64) to move the quantity of slag out from the back of ladle to be skimmed into a slag pot (4) to remove undesired impurities from the hot metal.
Claims9
A method (110) of removing a quantity of slag (24), the quantity of slag comprised of a quantity of heaviest slag and a quantity of remaining slag in at least one of a liquid or small and chunky state floating on a surface (6a) of a quantity of hot metal (6) in a ladle (2) having a spout (8) and into a slag pot (4) using a skimmer (100) having a convex-shaped steel framework with a front face formed with at least one port disposed as a gas permeable structure, a piping system housed inside the framework having a gas output end terminating at the at least one port, and a reinforced refractory coating formed over the steel framework, the method (110) comprising:
- introducing (120) a first predetermined flow of gas into the piping system (60) and expelling the gas out through the at least one port;
- positioning (124) the skimmer over the ladle;
- and
- skimming (126) the quantity of heaviest slag into the slag pot:
- wherein the gas expelled through the at least one port is directed away from the front face (50) and away from the spout (8).
Dependencies are inferred from the claim text.