Fundição

Bogie Hearth Furnaces Electrically Heated

W 2200/S with exchangeable table system W 7500 with bogie, separated in three parts

W 8250/S

Meander shaped heating elements for short process times

Bogie running on steel wheels with gear rack drive, no rails necessary

Bogie hearth furnace with gas supply system

Furnace system with W 17000 in work in progress

Bogie hearth furnace W 6340S

W 1000/G - W 10000

For annealing and hardening of larger parts, for example heavy cast parts or tool steel dies to temperatures between 800 °C and 1100 °C, we recommend our bogie hearth furnaces with radiation heating. The bogie can be loaded outside the furnace. When the design includes an electro-hydraulic lift door and a motorized bogie, the furnace can be opened while hot and the load can be removed for cooling or quenching. When several bogies are used together with a second door or bogie transfer system, one bogie can be loaded outside the furnace while the other bogie is in the furnace. This shortens process times and the residual energy of the furnace can be used when the new charge is heated.

  • Tmax 900  °C or 1280  °C
  • Dual shell housing with rear ventilation, provides low shell temperatures
  • Swing door hinged on the right side
  • Heating from five sides (four sides and bogie) provides for a optimum temperature uniformity
  • Bogie heating receives power via blade contacts when driven in
  • Heating elements mounted on support tubes provide for free radiation and long service life
  • Bottom heating protected by SiC tiles on the bogie providing level stacking surface
  • Multi-layer insulation consisting of lightweight refractory bricks backed by microporus silica insulation
  • Self-supporting and long-life ceiling construction with bricks laid in arched construction
  • Bogies with flanged wheels running on rails for easy and precise movement of heavy loads
  • Adjustable air inlet damper
  • Manual exhaust air flap on the furnace roof
  • Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment

  • Fiber insulation also in combination with meander shaped heating for short heating times
  • Electric chain-driven bogie in combination with rail operation for smooth movement of heavy loads
  • Bogie running on steel wheels with gear rack drive, no rails in front of the furnace necessary
  • Different possibilities for an extension to a bogie hearth furnace system:
    • Additional bogies
    • Bogie transfer system with parking rails to exchange bogies running on rails or to connect multiples furnaces
    • Motor-driven bogies and cross-traversal system
    • Fully automatic control of the bogie exchange
  • Electro-hydraulic lift door
  • Motor-driven exhaust air flap, switchable via the program
  • Uncontrolled or controlled cooling system with frequency-controlled cooling fan and motor-driven exhaust air flap
  • Multi-zone control adapted to the particular furnace provides model for optimal the temperature uniformity
  • Commissioning of the furnace with test firing and temperature uniformity measurement (also with load) for the purpose of process optimization
  • Process documentation and control with Controltherm MV software package, NTLog and NTGraph for the basic furnace or Nabertherm Control Center (NCC) for monitoring, documentation and control
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeatingElectricalWeight
 °Cwdhin lWDHpower in kW1connectionin kg
W 1000/G90080016008001000147024101915403-phase3000
W 1500/G90090019009001500157027102030573-phase3500
W 2200/G9001000220010002200167030102140753-phase4500
W 3300/G90010002800120033001670361023551103-phase5300
W 5000/G90010003600140050001670441025551403-phase7300
W 7500/G90010005400140075001670621025551853-phase10300
W 10000/G900100071001400100001670791025552353-phase12500
            
W 1000128080016008001000147024101915573-phase3000
W 1500128090019009001500157027102030753-phase3500
W 2200128010002200100022001670301021401103-phase4000
W 3300128010002800120033001670361023551403-phase5300
W 5000128010003600140050001670441025551853-phase7500
W 7500128010005400140075001670621025552353-phase9100
W 100001280100071001400100001670791025553003-phase11000
1Depending on furnace design connected load might be higher
 

Gas-Fired Bogie Hearth Furnaces up to 1400 °C for Firing or Sintering in Air or under Reducing Atmosphere

Combi furnace system consisting of one gas-fired furnace WB 11000HS and two additional bogies incl. bogie transfer system and incl. necessary park rails Bogie hearth furnace WB 14880S

Furnace chamber with eight high-speed burners

Gas-fired bogie hearth furnaces distinguish by their unique efficiency. The use of high-speed burners allows for short heating times. The burners are arranged according to the furnace geometry providing for a optimum temperature uniformity. Depending on the furnace dimensions, the burners can alternatively be equipped with recuperator technology to save energy. The high-quality, long-life fiber insulation with storage capacity provides for short heating and cooling times.

  • Tmax up to 1400 °C, depending on furnace design
  • Powerful, sturdy high-speed burner with pulse control and special flame control in the furnace chamber provide for optimum temperature uniformity
  • Operation with city gas, natural gas or liquified gas
  • Fully automatic PLC control of the temperature as well as monitoring of the burner function
  • Reduction-resistant fiber insulation with low heat storage provides for short heating and cooling times
  • Dual shell housing provides for low outside temperatures
  • Exhaust hood with fittings for further discharge of the exhaust gases
  • Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment

  • Automatic lambda control to set the furnace atmosphere
  • Exhaust air and exhaust gas piping
  • Recuperator burners utilizing part of the waste heat in the exhaust tract to preheat the combustion air and considerably contribute to energy saving
  • Thermal or catalytic exhaust cleaning systems
  • Process documentation and control with Controltherm MV software package, NTLog and NTGraph for the basic furnace or Nabertherm Control Center (NCC) for monitoring, documentation and control
 

Chamber Furnaces Gas-Fired

NB 2880/S NB 4330/S

NB 2304/S with integrated thermal afterburner for hot cleaning of painted parts

Compact burners for standard models up to NB 600

Certain heat treatment processes require a gas-fired chamber furnace. Short heating times due to the high power are a convincing argument. The chamber furnaces with powerful atmospheric gas burners cover a wide variety of these processes. In the basic version the burners are manually ignited once at the start of the process. The automatic control system then takes over control of the temperature curve. At program end, the burners are automatically switched off. Depending on the process, the furnaces can be equipped with automatically controlled fan burners and safety technology for debinding. Depending on the model, these furnaces can be upgraded with fully automatic fan burners and additional accessories.

  • Tmax 1300  °C
  • Powerful, atmospheric burners for operation with liquified gas or natural gas
  • Special positioning of the gas burners with flame guide top-down provides for optimum temperature uniformity
  • Fully automatic temperature control
  • Gas fittings with flame control and safety valve in accordance with DVGW (German Technical and Scientific Association for Gas and Water)
  • Multi-layer, reduction-proof insulation with light-weight refractory bricks and special back-up insulation result in low gas consumption
  • Self-supporting and rugged ceiling, bricks laid in arched construction or as fiber insulation
  • Dual shell housing, side panels made of stainless steel (NB 300), for low outside temperatures
  • Solid, double-walled door
  • Exhaust hood with 150 mm (NB 300) and 200 mm (NB 440, NB 600) diameter connection
  • Over-temperature limiter with manual reset for thermal protection class 2 in accordance with EN 60519-2 as temperature limiter to protect the furnace and load

Additional equipment

  • Fan burner with fully automatic control
  • Exhaust air and exhaust gas piping
  • Thermal or catalytic exhaust cleaning systems
  • Recuperator technology for heat recovery
  • Process documentation and control with Controltherm MV software package, NTLog and NTGraph for the basic furnace or Nabertherm Control Center (NCC) for monitoring, documentation and control