Railtech International

Jean-Jacques Thuru

Lionel Winiar

Frédéric Delcroix

Francis Viseur

Patrick Bommart

The invention concerns a method for the aluminothermic welding of rails, comprising the steps of: The invention also concerns a mold () adapted to fit over the two rail ends to form a molding cavity (), comprising a crucible () arranged above the region of the rail head so that it is fed with molten metal from the molding cavity () via a secondary channel ().

Method and device for the aluminothermic welding of rails

The invention relates to a device for igniting an aluminothermic composition, characterized in that it comprises an electric resistor for connecting two electrodes and to be supplied by an electric current source of in order to generate heat by a Joule effect, said electric resistor being exposed to a medium comprising oxygen and carbon so that the temperature rise of the medium by the resistor results in the formation of carbon monoxide, and then in an exothermal reaction of the latter with oxygen, thus generating a flame capable of igniting of the aluminothermic composition.

Device for igniting an alumino-thermal composition, crucible containing same and related methods

A cover for closing a top opening of a thermite reaction chamber of a crucible is substantially continuous and is secured to an annular filter lining via a bottom peripheral edge for making contact on a top peripheral edge of the crucible. The filter lining is substantially continuous and is suitable for constituting a substantially continuous contact medium between the bottom edge and top edge. The cover is applicable, for example, to thermite welding, e.g., for use in tunnels or underground.

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St. Amand les Eaux, France

Jean-Jacques Thuru