Electromagnetic priming of molten metal filters
AssigneePyrotek, Inc.
InventorRobert Fritzsch
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Abstract
According to one aspect of the present disclosure, a method of priming a ceramic filter element for removal of solid inclusions from liquid metal is provided. The filter element is contained in a filter box and at least two separate inductors are placed on opposed sides of the filter element. The method includes the steps of a) applying an excitation current to the inductors, b) adding sufficient liquid metal to cover an upstream side of the filter element, c) allowing the current induced in the liquid metal by the inductors to create Lorentz forces which press upon and stir the liquid metal such that the liquid metal is forced into the ceramic filter element, hence priming the filter element, and d) discontinuing the excitation current once a predetermined degree of priming has been obtained.
Claims19
A method of priming a filter element, said filter element configured for removal of solid inclusions from liquid metal, wherein said filter element is contained in a box or launder and at least two inductors are placed symmetrically on opposed sides of the filter element, each of said inductors receiving electrical power independent from the other, said method comprises:
- a) applying an adjustable AC or pulsed DC excitation current to the at least two inductors, b) adding liquid metal to cover an upstream side of the filter element, c) allowing the currents induced in the liquid metal by the inductors creating a variable magnetic field to create Lorentz forces which stir the liquid metal such that the liquid metal is forced into the filter element, priming the filter element, and d) discontinuing the excitation current once a predetermined degree of priming has been obtained.
A method of filtering molten metal comprising inserting a filter between a launder upper section and a launder lower section and priming said filter using two separate plate inductors placed at the long sides of the filter.
A method of filtering molten metal wherein a filter is oriented vertically and separate inductors are disposed on at least two sides of the filter.
Dependencies are inferred from the claim text.