A panel-shaped wall elements of at least two mainly rectangular, is constituted by a long side of these panel-like wall element as are joined together, the front surface plate element 1, 1 ', as well as support elements 2, 2 to be attached thereto wall structure made from a refractory material 'and the insulating element 3, 3' comprises a panel-like wall element comprising a. The bent portion 1a is long sides of the wall elements formed from the edges of the surface plate element, 1 b, 1 b 'is provided, the bent portion is shaped so that the wall elements can be joined together parallel to its short sides and is dimensioned, partially overlap one another during installation, locked transversely to the plane of the wall elements without any separate fastening members.