Continuously operable plant for degassing and pouring metal melts

Claim 1

A continuously operable vacuum plant for degassing and pouring metal melts, comprising a feed head, a downgate from said feed head, a vacuum chamber and a transfer passage which joins the bottom of said downgate to the bottom of said vacuum chamber, for transferring metal melt from said downgate to said vacuum chamber, said vacuum chamber including a pouring spout, an open, upwardly inclined electromagnetic conveyor trough with an inductor arranged under the full length thereof, said conveyor trough communicating at its lowermost end with said crucible and having a lip at its uppermost end connected to said pouring spout, a vacuumtight cover surrounding said electromagnetic conveyor trough and pouring spout and means for providing a vacuum within said vacuumtight cover said feed head and downgate, said transfer passage and said vacuum chamber having such dimensions that when said vacuumproducing means is operating and said inductor is not operating a level of metal melt is drawn into said vacuum chamber through said transfer passage which is lower than the upper end of said electromagnetic conveyor trough so that when said inductor is energized, said metal melt is conveyed to the upper end of said conveyor trough solely under the influence of the electromagnetic field, is subjected to the vacuum within said vacuumtight cover which removes impurities from said metal melt and pours out from said vacuum chamber through said pouring spout.