remaining working lining characterized by the fact that the space between the lower end of the template and the working lining which extends below the area to be restored is sealed off by inflating a hose shaped sealing body 7 and the sealing body 7 is deflated again before the removal of the template another feature of the invention resides broadly in the device for the performance of the process characterized by the fact that attached to the lower end of the template is a ring 6 which is offset toward the inside and the hose shaped inflatable sealing body is attached on the periphery of the ring 7 yet another feature of the invention resides broadly in the device characterized by the fact that fastened to the lower edge of the template is an elastic protective shell 8 which surrounds the sealing body on the outside still another feature of the invention resides broadly in the device characterized by the fact that the elastic protective shell 8 presses the deflated sealing body 7 against the ring 6 which is offset toward the inside another feature of the invention resides broadly in the process for the manufacture of a refractory lining of the wall and bottom of a.