Method and apparatus for melting solid pieces of metal
AssigneeASEA Aktiebolag
InventorStaffan Granstrom
Life of this patent
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Abstract
Solid pieces of metal, such as steel scrap and ferrous pellets, are charged in a basin having a refractory inside and progressively melted down by an electric induction heater positioned above the basin and the charge. As melt collects in the bottom of the basin it is continuously or intermittently tapped into a storage container having heating means for keeping the melt molten. This prevents the melt level in the basin's bottom from rising uncontrollably.
Claims12
A method for melting solid pieces of metal, comprising charging said pieces in a basin having a refractory inside, and downwardly inductively heating the pieces in the basin by an electric AC induction heating means positioned above the basin and the pieces and so as to induce an AC current field in the pieces heating and progressively melting the pieces into a melt collecting in the basin's bottom.
An apparatus for melting solid pieces of metal, comprising a basin having a bottom portion with a refractory inside which is adapted to contain a charge of said pieces, and an electric AC induction heater positioned above said basin and pieces when charged in the basin's bottom portion so as to induce a heating AC current field in the pieces causing them to progressively melt and form a melt collecting in said bottom portion.
A method for melting solid pieces of metal or metal alloys, comprising charging said pieces in a basin having a refractory inside, and downwardly inductively heating the pieces in the basin by an electric AC induction heating means positioned in a cover for closing said basin upwards in closed position, said AC induction heating means inducing an AC current field in the pieces and therewith heating and progressively melting the pieces into a melt collecting in the basin's bottom, from which it is tapped into a separate heat retaining receptacle.
An apparatus for melting solid pieces of metal or metal alloy, comprising a basin having a bottom portion with a refractory inside which is adapted to contain a charge of said pieces, and an electric AC induction heater arranged in a cover positioned above said basin and pieces and arranged to close said basin upwards when applied upon the same, said heater being arranged to induce a heating AC current field in the pieces causing them to progressively melt and form a melt collecting in said bottom portion, members in said basin to tap said melt into heat retaining receptacles.
Dependencies are inferred from the claim text.