Single billet furnaces come both as a stand alone heating solution or as the final heating stage after a gas or induction fired multi-billet furnace basic heating that has taken place and meet the highest requirements for temperature accuracy and repeatability.

It is characteristic of single-billet furnaces that only a single billet is heated in the induction coil  which is adapted in an optimum way to the diameter and length of the billet. The length of the induction coil depends on the maximum billet length processed in the process. For optimum heating of shorter billets, a field extender adapted to the diameter is used, which, like the billet itself, is in the area of influence of the magnetic field and reduces possible edge overheating to a minimum.

The division of the coil into several zones in connection with the IGBT converters used allows a precise and infinitely adjustable control of the power and therefore an even heating over the length of the billet. The temperature of the billets is measured as they are fed and then monitored throughout the heating process. Possible temperature irregularities of the basic warming are therefore recorded and compensated.

In addition to the high temperature accuracy, another advantage of the single-billet furnace is the short heating time, which leads to a short dwell time in the high temperature range and therefore to minimisation of scaling. Scaling can be further reduced by applying inert gas to the coil.