초록 ▼

Exothermic reaction mixtures are economically ignited remotely and electrically without the use of a low ignition starting material by creating a predetermined spark gap within a matrix of such mixture and then impressing a high energy spark across the gap through the use of a capacitor discharge ci

Exothermic reaction mixtures are economically ignited remotely and electrically without the use of a low ignition starting material by creating a predetermined spark gap within a matrix of such mixture and then impressing a high energy spark across the gap through the use of a capacitor discharge circuit. The mixture is contained in a graphite or ceramic vessel or crucible and is supported over a tap hole or runner by a fusible metal disk. The material of the vessel is preferably graphite which is electrically conductive. In one form of the invention, an insulated wire with a bare tip is positioned just below the top surface of the mixture and the tip spaced a predetermined distance from the wall of the vessel. The capacitor discharge circuit is then employed to fire a high energy spark through a matrix of the material across the gap formed between the wire and vessel to initiate the reaction. In another form the spark gap may be established in a small cylindrical cartridge containing the material. The cartridge may be positioned through a hole in the side wall of the mold just below or near the top of the exothermic material so that it can be filled with the material from the main body of the exothermic material.

대표청구항 ▼

A method of converting exothermic material to molten metal comprising the steps of forming a spark gap in a matrix of such material, and then creating a high energy spark across such gap sufficient to initiate and sustain an exothermic reaction of such material wherein such matrix of exothermic mate

A method of converting exothermic material to molten metal comprising the steps of forming a spark gap in a matrix of such material, and then creating a high energy spark across such gap sufficient to initiate and sustain an exothermic reaction of such material wherein such matrix of exothermic material is contained in a small ignition cartridge and is expelled from such cartridge when ignited in turn to ignite a larger body of exothermic material.