Method of treating liquid melts
First Claim
1. A method for the treatment of a liquid metal melt having particles which are inhomogeneous with and distributed through the liquid metal melt, to reduce the number of particles therein comprising:
- creating a standing wave including a node, in the liquid metal melt by transmitting ultrasound energy therethrough, whereby the particles concentrate, and are encouraged to coalesce in the liquid metal melt, at the nodes of the standing wave; and
removing coalesced particles from the liquid metal melt, thereby resulting in a purified liquid metal melt.
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Accused Products
Abstract
A probe for ultrasound testing or treatment of a molten metal comprises:
an ultrasound-transmitting rod (10) of which one end is a "downstream" end (12) adapted to contact molten metal under test or treatment;
a piezoelectric crystal (50) adapted to supply ultrasound to or receive ultrasound from the rod (10); and
rod-cooling means (16) located near to the downstream end (12) of the rod (10).
A method for the treatment of a liquid metal melt, to reduce the number of inhomogeneous particles distributed through the melt comprises:
creating a standing wave of ultrasound energy within the melt, e.g. using a probe as defined above, whereby the inhomogeneous particles concentrate, and are encouraged to coalesce, at the nodes of the standing wave; and
separating the coalesced particles from the bulk of the liquid melt.
30 Citations
5 Claims
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1. A method for the treatment of a liquid metal melt having particles which are inhomogeneous with and distributed through the liquid metal melt, to reduce the number of particles therein comprising:
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creating a standing wave including a node, in the liquid metal melt by transmitting ultrasound energy therethrough, whereby the particles concentrate, and are encouraged to coalesce in the liquid metal melt, at the nodes of the standing wave; and removing coalesced particles from the liquid metal melt, thereby resulting in a purified liquid metal melt. - View Dependent Claims (2, 3, 4, 5)
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Specification