Continuous metal casting method, apparatus and product

摘要

Dense homogeneous metal is cast in long lengths by introducing liquid metal into the lower portion of a casting vessel in the presence of an elongated upwardly-traveling alternating electromagnetic levitation field that provides a levitation ratio of from 75% to 200% of the weight per unit length of the liquid metal, solidifying the metal while moving upwardly through the field, and removing solidified metal product from the upper portion of the field. The frequency of the alternating electromagnetic field is established at or near a value F=(36 rho /D2) where F is the frequency in kilohertz, rho is the resistivity of the liquid metal column in micro-ohm-centimeters and D is the diameter of the solidified metal rod product in millimeters.