초록 ▼

The filtration of molten metal is obtained by providing the filtration medium, which may, for example, be formed of a granulated material, with a conductive coating or conductive particles. Electrical energy is coupled across the filter to create a current flow through the conductive material. The m

The filtration of molten metal is obtained by providing the filtration medium, which may, for example, be formed of a granulated material, with a conductive coating or conductive particles. Electrical energy is coupled across the filter to create a current flow through the conductive material. The magnitude of the current generates heat of a level sufficient to maintain the metallic material being filtered in the molten state as it passes through the filter medium. The granules may be covered with a conductive coating or conductive particles. In an alternative embodiment, the granules may be formed of a material, such as silicon carbide, which is capable of being inductively heating to maintain the metallic material being filtered in the molten state as it is passed through the filter medium.

대표청구항 ▼

A filter apparatus for heating the filter media suitable for the filtration of molten metallic material delivered to the filter apparatus in the molten state and for maintaining the metallic material in the molten stage during filtration thereof, said filter structure being comprised of: a filter me

A filter apparatus for heating the filter media suitable for the filtration of molten metallic material delivered to the filter apparatus in the molten state and for maintaining the metallic material in the molten stage during filtration thereof, said filter structure being comprised of: a filter media in granulated form; said filter media having a conductive material deposited thereon; a pair of electrical contacts being coupled to the perimeter of said filter media for coupling electrical energy from a power source to said filter, said power source being sufficient to develop a current in said conductive material, said current being of a magnitude sufficient to develop I2R heat loss to achieve the desired pre-heating level preparatory to initiation of flow of the molten metallic material delivered to said apparatus for passage and filtration through said filter media.