Image Number 3 for United States Patent #4033561.
A cooling plate for circulating fluid for cooling the walls of shaft furnaces and particularly blast furnaces, the plate being placed between the refractory material to be cooled and the facing of the furnace to be protected. The cooling plate includes a frame formed by two bent tubular elements welded at their ends to separator plates, an independent stream of cooling fluid passing through each tubular element; and a flat hollow central element consisting of an inner double-walled panel welded to the inner periphery of the frame, this inner panel forming an enclosure through which passes an independent stream of the cooling fluid.
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