Carbolite CAF G5 Coal Ash Fusibility Furnace

Code: CAF G5
  • Coal Ash Fusibility Testing Tube Furnace
  • Maximum Temperature 1600C
  • Process Digitally Recorded

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The Carbolite Gero CAF G5 Coal Ash Fusibility Furnace replaces previous model CAF Digital.

The CAF G5 features a 79mm internal diameter work tube that can hold at least six samples simultaneously. The maximum temperature is 1600c. The software supplied digitally records the tests, with automatic and manual settings so tests can be executed without supervision and reviewed later.  The software has zoom facilities for test analysis and can set temperature supplied with integrated PC and firmware.

During the industrial burning coal heat melts ash causing residue on cooling that solidifies into clinker. These clinkers can be large, causing shutdowns and waste disposal issues. Coal ash fusibility testing determines the ash fusibility characteristics of the fuel.  The furnace conforms to standards ISO 540:2008; ASTM D 1857 / D1857M – 04 (2010); DIN 51730:2007-09; DD CEN/TS 15370-1:2006 (biomass) and PD CEN/TR 15404:2010 (solid recovered fuels (SRF). Also suitable for biomass or solid recovered fuels testing. A work tube with inbuilt lighting system is an option when testing low initial deformation temperature of SRF or biomass samples.

The furnace features lightweight insulation for fast cooling allowing multiple tests to be run in a day. Integral Silicon carbide elements provide heating.

Supplied as standard

  • Sample carrier x 1
  • Sample tiles x 100
  • Sample loading tool x 1
  • Test piece mould x 1 (coal ash)
  • Test piece mould and hand press x 1 (biomass & SRF)
  • External mounting proprietary CO alarm x 1


  • Default software settings and individual analysis form for coal ash, biomass and SRF
  • The operator can set recorded images from every 1°C increment to every 20°C. The maximum interval for auto analysis is 5°C.
  • One configurable grid assigned to each test piece
  • Flow meters for oxidising, reducing gas flow
  • Gas Inlets for reducing, oxidising & purge gasses
  • Gas Tight Sealed for safety and controlled atmosphere retention
  • Oxidising or reducing gas selection switch
  • Supplied Controller with auto-programming
  • Oxidising or reducing gas selection switch

Models (all fitted CAF controller 3508)


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CAF-G5 Brochure 184 KB

Additional information

Weight0.09 kg