Method and device for treating a metal or a molten metal alloy using an addition agent
OwnerMourad Toumiinventor
Life of this patent
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Abstract
A method and device for treating a metal or a molten metal alloy using an addition agent, wherein the addition agent is deposited in a local cavity arranged at the bottom of a treatment ladle and surrounded by a protruding wall, and a closing member connected to movement means is able to form, with the bottom of the treatment ladle, in a low insulating position, a chamber including said local cavity and comprising an intermediate annular space around the small wall. Application to the treatment of a molten cast iron using pure magnesium or magnesium alloy.
Claims11
A process for treating a molten metal or metal alloy using an additive agent, comprising:
- depositing the additive agent in at least one local cavity made in a bottom of a treatment ladle and delimited by a low annular wall that protrudes with respect to the bottom;
- lowering down to a bottom position at least one closure member comprising a closure bell so that the closure bell surrounds, at a distance, the low annular wall and so that a frontal edge of the closure bell bears against the bottom of the treatment ladle, creating an annular bearing zone around and at a distance from the low annular wall and that is located below an upper edge of the low annular wall, forming a chamber that includes the at least one local cavity;
- at least partially filling the treatment ladle with the molten metal or metal alloy;
- and
- raising the at least one closure member so as to bring the molten metal or metal alloy and the additive agent into contact.
A device for treating a molten metal or metal alloy using an additive agent, comprising a treatment ladle, wherein at least one local cavity is made in a bottom of the treatment ladle and that comprises added equipment comprising at least one closure member and a displacement assembly for moving the at least one closure member to and from a bottom position for isolating or closing the at least one local cavity;
- wherein the bottom of the treatment ladle has a protruding low annular wall that delimits the at least one local cavity;
- and wherein a lower portion of the at least one closure member comprises a closure bell which, in said bottom position, is capable of surrounding, at a distance, the low annular wall and a frontal edge of which, in said bottom position, is capable of bearing against the bottom of the treatment ladle, creating an annular bearing zone around and at a distance from the low annular wall and that is located below an upper edge of the low annular wall, so as to form a chamber that includes the at least one local cavity.
Dependencies are inferred from the claim text.