The exothermic masses are based on the Goldschmidt process, also known as the thermite process. During the aluminothermic reaction between aluminum and oxygen, which comes from the added iron oxide, a large amount of energy is released in the form of heat.
Fluorine compounds in small amounts serve as a catalyst for this reaction. To prevent the powders from slagging due to the high temperatures, the reaction must be more moderate. This is achieved by diluting the exothermic components with various fillers.
Our standard material THERMEX is a highly exothermic, fast-igniting feeder material with highest strength. After reaction, the feeder body has a high pore volume and good insulating properties. The characteristic exothermic values such as ignition and burn time are adapted to the feeder module. The THERMEX qualities were developed especially for use on modern, high-pressure molding lines and therefore have a high mechanical strength.
This is a fluorine-free feeder material with high strength. The properties are roughly comparable to those of THERMEX. Fluorine is substituted in this feeder material.
THERMEX “CB” is a low flouride and exothermic/insulating feeder material with good strength and reduced weight. Due to the high proportion of high-quality insulating materials, the feeder body has a high pore volume and very good insulating properties after the reaction. The characteristic EXO values are adapted to the modulus.
THERMISO is an insulating feeder material, which has been developed for special applications in steel casting in addition to its main field of application in nonferrous foundries. Due to the high proportion of high-quality insulating materials, the feeder module can be extended.