Device for plugging tap-holes of reactors for metallurgical processes

A device for plugging the taphole from within reactors for metallurgical processes, comprising a solid element made of refractory material and having an enlarged substantially cylindrical head, an annular packing consisting essentially of a mixture of refractory material in powder form and of a binder, said packing being disposed on the same side of said head as said element and surrounding one end of said element, said material being cold coherent and plastically deformable for increasing values of the temperature within the limits of the thermal interval within which the mixture sets, and becoming indeformable for values of the temperature higher than the said thermal setting interval, but lower than the operating temperature of the reactor, after a period of exposure to the operative conditions longer than the time necessary for installing the plug, and an annular collar member made of sheet material and surrounding said annular packing and spaced outwardly from said solid element by said annular packing.