A crucible, an evaporation source and an evaporation device are disclosed. The crucible includes a crucible body. The crucible body includes: an inner heating layer with a first heater assembly and an outer heating layer with a second heater assembly. The outer heating layer is at a periphery of the inner heating layer, and surrounds the inner heating layer, and a space between the outer heating layer and the inner heating layer defines an accommodation space for a to-be-evaporated material.

Provided is a high frequency skull crucible including: a side wall close to a raw material feeder and a side wall on which an outlet is formed, the two side walls being located vertically to face each other; a body located between the two side walls; and high frequency coils adapted to surround a portion of the body that is close to the side wall on which the outlet is formed, wherein the side wall on which the outlet is formed has the outlet formed on top thereof to discharge a melt, the body has the shape of a horizontally located semicylinder or the shape of a horizontally located cylinder whose given upper portion is cut, and the body is inclinedly located on the ground to allow the melt to be made consistently.

The invention relates to an induction crucible furnace and to a magnetic return element for an induction crucible furnace. The induction crucible furnace has a corresponding coil and a plurality of magnetic return elements, which are designed in the form of individual units arranged on the outer lateral surface of the coil with peripheral spacing. In order to guide the magnetic flux produced by the coil, the magnetic return elements each have an assembly consisting of a plurality of elongate individual elements of magnetically permeable material that are electrically insulated from each other and extend parallel to the furnace axis. Said individual elements consist at least partially of bars, which are electrically insulated from each other and the longitudinal axes of which extend parallel to the furnace axis. In this way, both eddy currents that hit the assembly from the radial direction and eddy currents that hit the assembly with a transverse component are minimized.

The disclosed technology includes a mounting enclosure having a replaceable insert panel used to mount an apparatus used in a melting furnace. The replaceable insert panel may be accessed and removed from a rear open end of the mounting enclosure to allow replacement without having to access the interior of the furnace.