furnace design co.,ltd



crucible furnace

crucible furnacea crucible furnace is a casting facility, in which metal is melted in a pot (crucible) inside a furnace, before being poured into a mould, usually constructed from sand. a sand-tray beneath where molten metal is poured contains any spillage. there are tiles which are situated around the work chamber. silicon carbide heating elements are mounted horizontally behind these tiles.

the insulation is ensured by the low thermal mass ceramic fiber material which results in low energy loss and insulating bricks below the hearth provide good load bearing capacity. normally there are two chambers in the crucible furnace. it may or may not have the apertures.

while operating, certain guidelines and precautions should be followed to avoid accident. firstly the furnace must not be allowed to come in close proximity of water as contact can cause the molten aluminum- or zinc-based alloys used in the furnace to explode.
  • the furnace is either gas fired and oil fired. electric fired crucible furnace are also very popular.

  • the heat is protected by very well insulation system.

  • they are easy to install and operate.

  • some crucible furnace use a grade of firebrick designed specifically for high temperature operation.

  • normally the lower portion of the crucible furnace is designed to be easily removed for replacement and/or repair.

  • both prop rod and lid chain is used for opening the lid of the furnace.

  • available in various size shapes and dimensions.

  • for crucible furnace that are used in glass industries are provided with baffle that helps to keep the heat in the firing chamber as the lid is opened
following are the applications of crucible furnace:
  • annealing
  • heat treating
  • research & development
  • melting
  • sintering ceramics
  • gold melting
  • silver melting
  • copper melting
  • thermal reactors
  • general purpose heating