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WHTC 3300/15 WHTC 4000/15 with bogie on rails and fan cooling

SiC rod elements on both sides of the furnace

Design with two doors and two bogies, on rails, allows for rapid bogie changes

Bogie hearth furnaces equipped with SiC rod heating can be used in the production of technical ceramics, especially for sintering at working temperatures up to 1550 °C. The WHTC product line with especially robust design can hold heavy charges including kiln furniture. The furnace chamber is equipped with a high-quality insulation made of high-temperature fiber blocks. The bogie insulation is structured in multi-layer lightweight refractory bricks on the heating chamber side.

The furnace is heated along both sides by vertically installed SiC heating rods. This heating technology permits processes requiring working temperatures above 1350 °C which cannot achieved with wire heating elements. The SiC rods are controlled by thyristor controller which counteract the aging of the heating elements by means of automatic power compensation.

Additional equipment The WHTC bogie hearth furnaces can be equipped with extensive additional equipment to be optimally adapted to individual processes.

  • Tmax 1550  °C
  • Dual shell housing with rear ventilation, provides for low shell temperatures
  • Swing door hinged on the right side
  • Heating from both sides via vertically mounted SiC rods
  • Thyristor controllers with automatic output compensation counteract the aging of SiC rods
  • Multi-layer insulation with high-quality fiber modules on the heating chamber side
  • Bogie for heavy loads lined with lightweight refractory bricks
  • Bogie hand driven on rubber tires
  • Motor-driven exhaust air flap on the furnace roof
  • Over-temperature limiter with manual reset for thermal protection class 2, as defined in EN 60519-2, to protect the furnace and charge
 

High-Temperature Chamber Furnaces with SiC Rod Heating up to 1550 °C

 
HTC 276/16 HTC 160/16  

Vertically mounted SiC rods

Exhaust-air flap and charge thermocouple including a stand as additional equipment

HTC 16/16 - HTC 450/16

The high-temperature chamber furnaces HTC 16/16 - HTC 450/16 are heated by vertically hung SiC rods, which makes them especially suitable for sintering processes up to a maximum operating temperature of 1550 °C. The basic construction of these furnaces make them comparable with the already familiar models in the HT product line and they can be upgraded with the same additional equipment.

  • Tmax 1550  °C
  • Dual shell housing with fan cooling for low shell temperatures
  • Heating from both sides via vertically mounted SiC rods
  • High-quality fiber insulation backed by special insulation
  • Side insulation constructed with tongue and groove blocks provides for low heat loss to the outside
  • Long-life roof insulation with special suspension
  • Chain-guided parallel swivel door for defined opening and closing of the door
  • Labyrinth sealing ensures the least possible temperature loss in the door area
  • Specially reinforced furnace floor for accommodating high charge weights for model HTC 16 and above
  • Exhaust air opening in the furnace roof
  • Heating elements switched via SCR‘s
  • 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
  • For additional equipment see models HT 04/16 - HT 450/18
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeatingElectricalWeight
 °Cwdhin lWDHpower in kW²connection*in kg
HTC 16/16 1550 200 300 260 16 810 700 1500 12,0 3-phase¹ 270
HTC 40/16 1550 300 350 350 40 1000 800 1620 12,0 3-phase 380
HTC 64/16 1550 400 400 400 64 1130 900 1670 18,0 3-phase 550
HTC 128/16 1550 400 800 400 128 1130 1290 1670 26,0 3-phase 750
HTC 160/16 1550 500 550 550 160 1245 1040 1900 21,0 3-phase 800
HTC 276/16 1550 500 1000 550 276 1140 1470 1900 36,0 3-phase 1100
HTC 450/16 1550 500 1150 780 450 1200 1620 2060 64,0 3-phase 1500
¹Heating only between two phases *Please see page 80 for more information about supply voltage
²Depending on furnace design connected load might be higher
 

High-Temperature Chamber Furnaces with Molybdenum Disilicide Heating Elements with Fiber Insulation up to 1800 °C

HT 16/17 HT 160/17DB2 with catalytic afterburning system

HT 276/17 with pneumatically driven and parallel lift door

Protection of heating elements against mechanical damage

Fresh air injection through perforated injection tubes with debinding package II

Display of pressure and volume flow with debinding package II

Inner process hood with gas injection through the furnace bottom protects the furnace chamber against contamination and/or prevents chemical interaction between the charge and heating elements

Gas supply system for non-flammable protective or reaction gases

HT 04/16 - HT 450/18

The high-temperature chamber furnaces HT 04/16 - HT 450/18 have proven reliable over many years in the lab and in the production of technical ceramics. Whether for bioceramics, for sintering CIM components or for other processes up to a maximum temperature of 1800 °C, these furnaces afford the optimal solution for the sintering process.

High-temperature chamber furnaces can either be insulated with fiber material or lightweight refractory bricks. Furnaces with fiber insulation achieve significantly shorter heating up times because of the low thermal mass. An insulation made of lightweight refractory bricks (see HFL models on page 35), on the other hand, has the advantage of better chemical stability.

These furnaces can also be tailored to specific processes by means of a wide range of additional equipment. The addition of a debinding package, for example, allows the use of these models as combi furnaces for debinding and sintering in one process. Thermal or catalytic exhaust cleaning equipment round up the system.

  • Tmax 1600  °C, 1750  °C or 1800  °C
  • Dual shell housing with fan cooling for low shell temperatures
  • Heating from both sides via molybdenum disilicide heating elements
  • High-quality fiber insulation backed by special insulation
  • Side insulation constructed with tongue and groove blocks provides for low heat loss to the outside
  • Long-life roof insulation with special suspension
  • Chain-guided parallel swivel door for defined opening and closing of the door
  • Labyrinth sealing ensures the least possible temperature loss in the door area
  • Specially reinforced furnace floor for accommodating high charge weights for model HT 40 and above
  • Exhaust air opening in the furnace roof
  • Heating elements switched via SCR‘s
  • 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

  • Uncontrolled or controlled cooling system with frequency-controlled cooling fan and motor-driven exhaust air flap
  • Commissioning of the furnace with test firing and temperature uniformity measurement (also with load) for the purpose of process optimization
  • Temperature measurement with thermocouples, types B and type S with automatic pull-out device for precise control results in the low temperature range
  • Protection grid in front of the heating elements to prevent mechanical damages
  • Special heating elements for zirconia sintering provide for longer service life with respect to chemical interaction between charge and heating elements
  • Protective gas connection for purging the furnace with non-flammable protective or reaction gases
  • Manual or automatic gas supply system
  • Gas supply system in the furnace chamber with ceramic bell jar, protective gas inlet and outlet from below for better sealing when operating with protective gases and/or to prevent from chemical interactions between the load and the insulation or the heating elements
  • Parallel swivel door opening upwards, also motor driven
  • Bottom insulation made of durable lightweight refractory bricks for heavy charge weights
  • Motorized exhaust air flap, switchable via the program
  • Debinding package I with passive safety package and monitoring of the underpressure in the furnace chamber, exhaust gas fan, fresh air fan, preset underpressure in the furnace chamber, controlled by Nabertherm controller P 300
  • Debinding package II with safety concept
  • Exhaust air and exhaust gas piping
  • Thermal or catalytic exhaust cleaning systems
  • Process documentation, display and control via HiproSystems control system
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeating power inElectricalWeight
 °Cwdhin lWDHkW²connection*in kg
HT 04/16 1600 150 150 150 4 610 470 1400 5.2 3-phase¹ 150
HT 08/16 1600 150 300 150 8 730 640 1400 8.0 3-phase¹ 200
HT 16/16 1600 200 300 260 16 810 700 1500 12.0 3-phase¹ 270
HT 40/16 1600 300 350 350 40 1000 800 1620 12.0 3-phase 380
HT 64/16 1600 400 400 400 64 1130 900 1670 18.0 3-phase 550
HT 128/16 1600 400 800 400 128 1130 1290 1670 26.0 3-phase 750
HT 160/16 1600 500 550 550 160 1245 1040 1900 21.0 3-phase 800
HT 276/16 1600 500 1000 550 276 1140 1470 1900 36.0 3-phase 1100
HT 450/16 1600 500 1150 780 450 1200 1620 2060 64.0 3-phase 1500
                       
HT 04/17 1750 150 150 150 4 610 470 1400 5.2 3-phase¹ 150
HT 08/17 1750 150 300 150 8 730 640 1400 8.0 3-phase¹ 200
HT 16/17 1750 200 300 260 16 810 700 1500 12.0 3-phase¹ 270
HT 40/17 1750 300 350 350 40 1000 800 1620 12.0 3-phase 380
HT 64/17 1750 400 400 400 64 1130 900 1670 18.0 3-phase 550
HT 128/17 1750 400 800 400 128 1130 1290 1670 26.0 3-phase 750
HT 160/17 1750 500 550 550 160 1245 1040 1900 21.0 3-phase 800
HT 276/17 1750 500 1000 550 276 1140 1470 1900 36.0 3-phase 1100
HT 450/17 1750 500 1150 780 450 1200 1620 2060 64.0 3-phase 1500
                       
HT 04/18 1800 150 150 150 4 610 470 1400 5.2 3-phase¹ 150
HT 08/18 1800 150 300 150 8 730 640 1400 9.0 3-phase¹ 200
HT 16/18 1800 200 300 260 16 810 700 1500 12.0 3-phase¹ 270
HT 40/18 1800 300 350 350 40 1000 800 1620 12.0 3-phase 380
HT 64/18 1800 400 400 400 64 1130 900 1670 18.0 3-phase 550
HT 128/18 1800 400 800 400 128 1130 1290 1670 26.0 3-phase 750
HT 160/18 1800 500 550 550 160 1245 1040 1900 21.0 3-phase 800
HT 276/18 1800 500 1000 550 276 1140 1470 1900 36.0 3-phase 1100
HT 450/18 1800 500 1150 780 450 1200 1620 2060 64.0 3-phase 1500
¹Heating only between two phases *Please see page 80 for more information about supply voltage
²Depending on furnace design connected load might be higher
 

Chamber Furnaces with Molybdenum Disilicide Heating Elements with Refractory Insulation up to 1700 °C

 
  HFL 160/17 with gas supply system HFL 295/13 with lift door and transformer in stand

Gas supply system for non-flammable protective or reaction gases

Protection grid in front of heating elements prevent against mechanical damages

HFL 16/16 - HFL 160/17

The HFL 16/16 HFL 160/17 product line is characterized by its lining with robust light weight refractory bricks. Compared with the fiber-insulated models of the HT product line, these furnaces are recommended when high charge weights have to be sintered. In most cases lightweight refractory brick insulation is also significantly more resistant to gas emissions occurring during heat treatment.

Standard equipment like HT models, except:

  • Tmax 1600  °C or 1700  °C
  • Sturdy lightweight refractory bricks and special backing insulation
  • Furnace floor made of lightweight refractory bricks accommodates high charge weights

Additional equipment like HT models

ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeating power inElectricalWeight
 °Cwdhin lWDHkW²connection*in kg
HFL 16/16 1600 200 300 260 16 770 830 1550 12 3-phase¹ 500
HFL 40/16 1600 300 350 350 40 880 880 1710 12 3-phase 660
HFL 64/16 1600 400 400 400 64 980 930 1830 18 3-phase 880
HFL 160/16 1600 500 550 550 160 1090 1080 2030 21 3-phase 1140
                       
HFL 16/17 1700 200 300 260 16 770 830 1550 12 3-phase¹ 530
HFL 40/17 1700 300 350 350 40 880 880 1710 12 3-phase 690
HFL 64/17 1700 400 400 400 64 980 930 1830 18 3-phase 920
HFL 160/17 1700 500 550 550 160 1090 1080 2030 21 3-phase 1190
¹Heating only between two phases *Please see page 80 for more information about supply voltage
²Depending on furnace design connected load might be higher
 

Lift-Top and Lift-Bottom Furnaces with Molybdenum Disilicide Heating Elements up to 1800 °C

 
  HT 276/17 LT HDB with manual table changing system and debinding package II HT 276/18 LTS with two inner process hoods for sintering under non-flammable protective or reaction gases

HT 64/17 LT

HT 680/17 LTS2 with table exchange system

Heat from all sides and between the stack to optimize temperature uniformity

High-temperature furnace HT 273/17S with table by transportable fork lift

HT 64/14 LB or LT - HT 1440/17 LB or LT

For charging complex settings we recommend lift-top or lift-bottom furnaces. Also small workparts can be conveniently loaded on different layers. Up to an application temperature of 1500 °C the furnaces are heated by SiC rods (HTC models). For sintering temperatures above 1500 °C these furnaces with molybdenum disilicide heating elements (HT models). Possible potential chemical interaction between the charge and the heating method can also affect the selection of heating system.

The basic furnace comes with one table. Depending on the technical requirements are equipped, a lift-top or lift-bottom version will be the choice. The system can be expanded with one or more changeable tables, either manually or electrically driven. Other additional equipment, like controlled cooling systems to short process cycles or the addition of a debinding package for debinding and sintering in one process provide for tailored solution for individual needs.

  • Tmax 1400  °C or 1500  °C (HTC models with SiC rod heating)
  • Tmax 1600  °C, 1750  °C or 1800  °C (HT models with molybdenum disilicide heating elements)
  • Dual shell housing with fan cooling provides for low shell temperatures
  • Designed as lift-top furnace with driven hood (LT) or lift-bottom furnace
  • Gently running, low-vibration spindle drive or electrohydraulic drive for larger models
  • Safe and tight closing of the furnace due to labyrinth seal and sand cup
  • Heating from all four sides provides for good temperature uniformity
  • High-quality fiber insulation backed by special insulation
  • Side insulation constructed with tongue and groove blocks provides for low heat dissipation to the outside
  • Long-life roof insulation with special suspension
  • Furnace table with special bottom reinforcement to accommodate high charge weights
  • Motor-driven exhaust air flap in the furnace roof, switchable at the program
  • PLC controls with state-of-the-art touch panel as user interface
  • 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

  • Uncontrolled or controlled cooling system with frequency-controlled cooling fan and motor-driven exhaust air flap
  • Commissioning of the furnace with test firing and temperature uniformity measurement (also with load) for the purpose of process optimization
  • Temperature measurement with thermocouples, types B and type S with automatic pull-out device for precise control results in the low temperature range
  • Heat from all sides and between the stack or with heating elements, positioned above each other to optimize temperature uniformity
  • Protective gas connection for purging the furnace with non-flammable protective or reaction gases
  • Manual or automatic gas supply systems
  • Gas supply system in the furnace chamber with ceramic bell jar, protective gas inlet and outlet from below for better sealing when operating with protective gases and/or to prevent from chemical interactions between the load and the insulation or the heating elements
  • Alternative table changing systems
  • Debinding package I with passive safety package and monitoring of the underpressure in the furnace chamber, exhaust gas fan, fresh air fan, preset underpressure in the furnace chamber, controlled by Nabertherm controller P 300
  • Debinding package II with passive safety concept
  • Exhaust air and exhaust gas piping
  • Automatic changing system for thermocouple type S/B for precise measurement and control quality at lowes temperatures, e.g. in combination with a debinding package
  • Thermal or catalytic exhaust cleaning systems
  • Process documentation, display and control via HiproSystems control system
ModelTmaxInner dimensions in mmVolumeOuter dimensions in mmHeating
power inElectricalWeight
 °Cwdhin lWDHkW¹connection*in kg
HT 64/16 LB, LT 1600 400 400 400 64 950 1750 2350 36 3-phase 1000
HT 166/16 LB, LT 1600 550 550 550 166 1095 2060 2450 42 3-phase 1600
HT 276/16 LB, LT 1600 1000 500 550 276 1550 2090 2600 50 3-phase 2000
HT 400/16 LB, LT 1600 1200 600 550 400 1750 2200 2600 72 3-phase 2200
HT 1000/16 LB, LT 1600 1000 1000 1000 1000 1550 2600 3200 146 3-phase 3000
HT 1030/16 LB, LT 1600 2200 600 780 1030 2800 2500 3000 163 3-phase 3000
HT 1440/16 LB, LT 1600 1800 800 1000 1440 3000 2800 3700 330 3-phase 4000
                       
HT 64/17 LB, LT 1750 400 400 400 64 950 1750 2350 36 3-phase 1000
HT 166/17 LB, LT 1750 550 550 550 166 1095 2060 2450 42 3-phase 1600
HT 276/17 LB, LT 1750 1000 500 550 276 1550 2090 2600 50 3-phase 2000
HT 400/17 LB, LT 1750 1200 600 550 400 1750 2200 2600 72 3-phase 2200
HT 1000/17 LB, LT 1750 1000 1000 1000 1000 1550 2600 3200 146 3-phase 3000
HT 1030/17 LB, LT 1750 2200 600 780 1030 2800 2500 3000 163 3-phase 3000
HT 1440/17 LB, LT 1750 1800 800 1000 1440 3000 2800 3700 330 3-phase 4000
                       
HT 64/18 LB, LT 1800 400 400 400 64 950 1750 2350 on request 3-phase 1000
HT 166/18 LB, LT 1800 550 550 550 166 1095 2060 2450 on request 3-phase 1600
HT 276/18 LB, LT 1800 1000 500 550 276 1550 2090 2600 on request 3-phase 2000
HT 400/18 LB, LT 1800 1200 600 550 400 1750 2200 2600 on request 3-phase 2200
HT 1000/18 LB, LT 1800 1000 1000 1000 1000 1550 2600 3200 on request 3-phase 3000
HT 1030/18 LB, LT 1800 2200 600 780 1030 2800 2500 3000 on request 3-phase 3000
HT 1440/18 LB, LT 1800 1800 800 1000 1440 3000 2800 3700 on request 3-phase 4000
¹Depending on furnace design connected load might be higher *Please see page 80 for more information about supply voltage
 

Gas-Fired Chamber Furnaces up to 1600 °C

 
HTB 645/17 HTB 940/17S  

 

Gas line for natural gas

The gas-fired high-temperature furnaces of the HTB product line are specially developed for applications requiring fast heating up ramps. Gas-fired furnaces are preferred also if inflammable gases are produced in large amounts during the process. A large content of the gas emissions are already burned in the furnace chamber, so that downstream equipment like thermal and catalytic exhaust cleaners can accordingly be downsized. The furnaces are insulated with highly heat-resistant and long-life lightweight refractory brick insulation or fiber materials.

  • Tmax 1600  °C
  • Powerful, sturdy high-speed burners with pulse control and special flame guidance in the furnace chamber provide for good temperature uniformity
  • Operation with natural gas, propane or liquified gas
  • Fully automatic PLC control of the temperature, including monitoring of the burner function
  • Gas fittings according to DVGW (German Technical and Scientific Association for Gas and Water) with flame monitoring and safety valve
  • 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
  • PLC control with touch panel as user interface

Additional equipment

  • Automatic lambda control to set the furnace atmosphere
  • Debinding package for debinding and sintering with corresponding safety technology
  • Exhaust air and exhaust gas piping
  • Recuperator burners
  • Thermal or catalytic exhaust cleaning systems
  • Process display and documentation via Nabertherm Control Center (NCC)

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