| OFTEN times metallurgical and ceramic
plant laboratories need a high temperature
furnace for small scale trials of melting or
similar heat treatment work above temperatures
of 1400°C within day time schedule of working.
The electric furnaces available in the market
for such work are difficult to maintain or operate
for want of spare resistor elements like Silicon
Carbide, Molybdenum disilicide, platinum and
graphite, all of which have to be imported and
are very difficult to obtain. Oil, even at its
best performance would develop temperatures
up to 1450°C or so with great difficulty and one
is not aware of any oil fired furnace in the
market that can reach 1500°C without any
recuperative arrangement. If any such furnace
is at all made available, temperature pick up
is extremely slow extending over several hours.
Oil furnaces suffer a further disadvantage in
that at high temperatures furnace atmospheres
are difficult to control. |
