Rotary Hearth Furnaces up to 1300 °C with and without Air Circulation Electrically Heated or Gas-Fired

Rotary hearth furnace DH 3020/1480/450/11, movable on rails, for preheating of molds for two forges Rotary hearth furnace DH 1200/-/300/11

Gear rim drive under the furnace

Rotary table with base plates made of highly heat-resistant steel to protect the insulation

Exhaust hood above charging opening

Pre-heating of steel rings for forging

Furnace floor can be lowered for maintenance purposes

The compact furnaces of the DH product line are optimally suited for continuous processes on a small floor space. They are designed for preheating processes such as the preheating of metal parts for forging. Charging and discharging can, be done at one position – either by a person or fully automatic. The hearth rotates in pre-set segments individually reconciled with the workpart geometry. The rotational speed and rotational intervals can be defined by the control system or by manual switching. The rotary hearth furnaces are specifically designed for the required throughput and charge dimensions. They are heated electrically or alternativelly gas-fired by means of powerfull gas burners. Subject to the temperature range these furnaces are equipped with or without air circulation.

  • Tmax 1100  °C, 1200  °C or 1300  °C without air circulation
  • Tmax 260  °C, 600  °C or 850  °C with air circulation
  • Wire heating elements in the furnaces ceiling for furnaces up to 1200  °C
  • SiC heating rods in the furnace ceiling for furnaces up to 1300  °C
  • Gas heating as an alternative to electrical heating
  • Models for 650  °C and 850  °C with powerful air circulation for better heat transfer onto the charge and to optimize the temperature uniformity
  • Very compact design compared with continuous furnaces
  • Designed for continuous operation at one working temperature
  • Table diameter up to 3000 mm
  • Hearth movement in defined segments
  • Low-vibration movement of the rotary hearth
  • Parallel swivel door
  • Motor-driven or rotational motion initiated by foot switch
  • Furnace floor can be lowered using a forklift truck for maintenance purposes

Additional equipment

  • Exhaust hood above the door opening for discharge of the warm exhaust air when door is open
  • Pneumatic drive of the parallel swivel door
  • Charging aids for ease of loading and unloading
  • Multi-zone control for adjustable thermal profile during the cycle
  • Protective gas connections
  • Process control and documentation with Controltherm MV software package
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeatingElectricalWeight
 °CØ OuterØ Innerhin lWDHpower in kW1connectionin kg
DH 1200/-/300/1111001200030034022002200250054.03-phase1000
DH 1500/800/250/111100150080025063024002300245021.03-phase1500
DH 3020/1480/450/11110030221480450250040004000250098.03-phase3500
1Depending on furnace design connected load might be higher