Synthesised in the catalytic retort(s) of endothermic generators, the gas in the endothermic atmosphere is combined with an additive gas including natural gas, propane (C3H8) or air and is then used to improve the surface chemistry work positioned in the furnace.
Endothermic Gas Generator
There are two common purposes of the atmospheres in the heat treating industry:
Protect the processed material from surface reactions (chemically inert)
Allow surface of processed material to change (chemically reactive)
Principal components of a endothermic gas generator
Principal components of endothermic gas generators:
Heating chamber for supplying heat by electric heating elements of combustion,
Vertical cylindrical retorts,
Tiny, porous ceramic pieces that are saturated with nickel, which acts as a catalyst for the reaction,
Cooling heat exchanger in order to cool the products of the reaction as quickly as possible so that it reaches a particular temperature which stops any further reaction,
Control system which will help maintain the consistency of the temperature of the reaction which will help adjust the gas ratio, providing the wanted dew point.