Manner null of extracting the melting metal from plasma arc melting reactor and plasma arc melting

摘要

PROBLEM TO BE SOLVED: To provide a plasma arc melting furnace for tapping only molten metal without mixing molten slag. ;SOLUTION: In a plasma arc melting furnace comprising a plasma melting furnace main body 3, a melting material feeder for feeding a melting material A to the plasma arc melting furnace 3, a main electrode for generating a plasma arc and a furnace bottom electrode 6, and a tap hole 11 for tapping molten metal, a molten metal tapping device is provided, comprising a drill 25 for grinding a refractory material filled in the tap hole 11, removing ground refractory material, and forming a hole into the tap hole 11, a fluid material detector 24 for detecting a change in a fluid material from molten metal C to molten slag B according to a change in permeability of a material flowing in the tap hole 11, and a mud gun 26 operated by a signal from the fluid material detector 24 for pushing back the molten slag B and the like remaining in the inside of the tap hole 11 into the plasma arc melting furnace main body 3 and blocking up the tap hole 11.;COPYRIGHT: (C)1999,JPO