Furnaces of this type are used for heat treatment of steel details in oxidizing or protective atmosphere. They can be used for annealing, tempering, hardening, normalizing and other processes, requiring heating of details up to 700, 1000 and 1200 °С.
The casing is made of sheet and shaped steel in a cylindrical form.
The thermal insulation is made of chemically neutral and resistant to various gas environments light-weight refractory bricks, vacuum formed refractory elements, felts and mats and protective coatings.
The heating elements are made of new high quality resistance alloys and are arranged thoroughly over the whole surface of the furnace chamber.
The furnaces are closed on top with circular heat insulated lid with automatic actuation.
Control of the temperature of the working chamber is carried out by a microprocessor programmable PID – temperature regulator, sensing the signal directly from a standard thermocouple.
The implementation of the furnaces provide minimum heat loss, fast warming and cooling and high precision of maintaining the set temperature.
Electrical switchboards are designed for power and control of the furnace with operating voltage according to the design and the control of the thermal processes. The electrical switchboards provide appropriate control and protection of the circuits and automation, providing the required security.
The electrical resistance furnaces and respectively the switchboards for powering and management work with three-phase mains voltage (380 V) – to power the load chain and 250 V for control circuits (command and protective circuits related to the safety).
Available furnaces of this type are made in accordance with the technical assignment of the client and in accordance with the requirements of the technology for heat treatment of the products.