The following furnaces are designed specifically
for the smelting of precious metals
Construction: The
crucible furnaces are fabricated from rolled steel section, panelled
with zinc coated steel sheet and finished with a hard wearing stoved
epoxy polyester powder coating.
Heating elements:
Silicon carbide heating elements are mounted horizontally behind the
tiles which are situated around the work chamber.
Insulation: Low
thermal mass ceramic fibre material ensures low energy loss and insulating
bricks below the hearth provide good load bearing capacity.
Work chambers: The
two chambers are constructed from cast refractory slabs and on the SCF4
and SCF8 models have the appropriate number of apertures cut to hold
the cricibles in position. For the SCF24 and SCF48 models, the chamber
sizes are the same but there are no apertures, allowing the customer
to select the crucible size and quantity to load into the furnace. The
chamber is ventilated by a 50mm flue fitted in each hinged lid which
pivots on parallel links, keeping the hot face away from the operator.
Controls: The furnace
temperature is regulated by a three term microprocessor based controller
with a back up temperature controller to protect the elements. A 24
hour, 7 day time switch is also fitted as standard to enable the furnace
to be switched on automatically ready for operation at the start of
the day. all controls are housed in a separate control box, measuring
600 x 600 x 600mm.
Specification
Model
SCF 4/SCF 24
SCF 8/SCF 48
Maximum temperature (degC)
1400
1400
Maximum recommended continuous working temperature
1350
1350
Temperature sensor
Pt/Pt 13% Rh thermocouple
Maximum power rating (kW)
15
21
Each chamber dimensions mm
(H)
(W)
(D)
800
1230
1040
850
1350
1300
External dimensions
(H)
(W)
(D)
800
1230
1040
850
1350
1300
Crucible capacity*
SCF 4: 4
SCF 24: 24
SCF 8: 8
SCF 48: 48
Power supply required
380/415V, 3 phase, neutral &
earth.
Other voltages available on request
* Please note that the capacity is based on
the following crucible sizes:
SCF4/SCF8 models: 120 x 180mm - maximum od x height
SCF24/SCF48 models: 79 x 97mm - maximum od x height
