Disposable transportable reaction crucible for a metallothermic, particularly aluminothermic welding portion

摘要

The present invention relates to a disposable transportable reaction crucible (1) for a metallothermic, especially aluminothermic, welding portion, comprising a crucible cover (2) with a cylindrical casing (3) and a flat floor (4); a lid (11) and a refractory lining in the cover (2), said lining accommodating the welding portion and having a opening in its base (4), which melts open. The aim of the invention is to provide a means of using inexpensive materials for the crucible cover and holding the reaction crucible securely in said cover with an inclined floor. To this end, a support ring (5) consisting of a refractory material is placed on the flat floor (4) of the crucible cover (2), which consists of a non-metallic material, with its flat underside (5a). Said support ring (5) is adapted to the inner diameter of the casing (3) and its top surface (5b) forms a cone in the direction of a central opening (5c). The refractory lining is a specially made cylindrical reaction vessel (7) which is inserted into the casing (3). Its floor (6, 6a, 6c) is configured in the shape of a cone corresponding to the top surface (5b) of the support ring (5) and lies on said ring (5), engaging in the central opening (5c) of the same with a hollow oval half dog (6d).