Products- Details

Furnace line for production/ heat treatment of carbon fiber of PAN (3 to 48 K) consisting of a chamber furnace (FKU-4-200/200/2000/300) for oxidation, a tube furnace (FRHT-4-100/2000/1100) for carbonization and a tube furnace (GRH-4-100/2000/1600) for graphitization.

Other possible applications are:

Oxidation, carbonization, graphitization of other carbon fiber materials in flow through process e. g. based on Lignin

The most important characteristics 

• FKU-4-200/200/2000/300
• Fully-automatized operation due to centralized control system (Siemens S 7)
• Chamber furnace in pilot-plant scale
• Temperature distribution +/- 5 K
• 4 heated zones in 4 levels
• 12,5 kW heating power each chamber
• 4 x 2000 mm heate length
• 200 x 200 mm chamber cross section
• Air circulation ducts made of the material 1.4301
• Supply air / fresh air volume adjustable each channel
• Resistance heated with tubular heating elements
• Max. operating temperature up to 300 °C
• Insulation of a combination of high quality mineral wool and micro-porous insulation plates 

FRHT-4-100/2000/1100

• Fully-automatized operation due to centralized control system (Siemens S 7)
• Tube furnace in pilot-plant scale
• Furnace unit separated horizontally, can be folded for service purposes
• 4 heated zones
• 8 kW heating power reach zone
• 2000 mm heated length
• 100 mm tube inner diameter
• Working tube material 1.4841
• Resistance heated with FeCrAl-heating elements
• Max. operating temperature up to 1100 °C
• Air lock technique for in and out coming product
• Gas feeding device for N2 for a atmosphere purity in the working tube smaller than 20 ppm rest oxygen content.
• Rest oxygen measurement in furnace room/ air lock, switchable 

GRH-4-100/2000/1600

• Fully-automatized operation due to centralized control system (Siemens S 7)
• Tube furnace in pilot-plant scale
• Furnace unit cover is removable for service purposes
• 4 heated zones
• 20 kW heating power each zone
• 2000 mm heated length
• 100 mm tube inner diameter
• Working tube material CFC
• Resistance heated with graphite cage heating elements
• Max. operating temperature up to 1600 °C
• Air lock technique for in and out coming product
• Gas feeding device for N2 for a atmosphere purity in the working tube smaller than 20 ppm rest oxygen content.
• Rest oxygen measurement in furnace room/ air lock, switchable 

We make it possible

Linn High Therm is specialized in adapting its products to customer’s requirements. Please let us know if you need any modifications. We will do everything to satisfy your wishes. 

Possible standardized options

• Different control systems
• Process guiding software
• Process visualization
• Larger working tube diameter
• Other heated zone lengths/ number of zones
• Higher working temperatures in furnace type GRH (up to 2800 °C)
• Temperature distribution +/-3 K in oxidation furnace
• Circulation cooling unit
• Emergency gas feeding device
• Thermal after burning for upcoming exhaust gases with HCN
• Thread transport via extern partners is possible