Abstract: An induction crucible furnace for the smelting of materials comprises a crucible which is surrounded by the induction coils and yoke which are mounted upon an intermediate vessel or shell closed by a cover overlying a mass of insulating material interposed between the crucible and inductor and the shell. The intermediate shell has an outwardly extending support flange by which it is mounted on an outward flange of the outer housing with clearance, the clearance likewise being filled with insulating material through openings formed in the flange of the intermediate shell inwardly of the wall of the housing. The flange of the latter projects beyond the flange of the intermediate member and a cover is connected to the housing flange to hermetically seal the system.

Abstract: Extraction apparatus wherein solid and liquid phases are subjected to vibro-acoustical action in order to intensify the extraction process. The apparatus includes an enclosure forming a working cell, spring means mounting such cell for vibratory movement, a vibrator mounted on the cell to vibrate, two laterally displaced feeding openings at the top of the cell for receiving, respectively, solid particulate material and liquid, two laterally spaced discharge outlets on the cell for discharging, respectively, solid material and liquid, and a screen mounted inside the cellacross the liquid discharge opening.