MOLYBDENUM, FERROMOLYBDENUM, AND AMMONIUM MOLYBDATE .
copper. The molybdenite concentration is usually 70 to 90 percent purity, when recovered from copper Technical grade molybdic oxide, consisting of 90 to 95 percent MoO3, is produced by roasting molybdenite concentrate in a multiple hearth furnace at temperatures up to 650° Molybdenum concentrates may be leached