Patents Assigned to OV-Eng Oy
  • Process for recovering metal values from alloy scraps
    Patent number: 4466826
    Abstract: A process for recovering metal values from Ni and Co based superalloy scraps containing Cr, W, and Mo is disclosed. The process is a multistep pyrometallurgical oxidation process wherein the metal is successively oxidized by oxygen, Fe.sub.2 O.sub.3 or both in a tiltable electric arc furnace with slag withdrawal after each oxidation step in order to obtain a substantially pure Ni/Co alloy melt.
    Type: Grant
    Filed: January 27, 1983
    Date of Patent: August 21, 1984
    Assignee: OV-Eng Oy
    Inventor: Osmo Vartiainen