Since the free energy is negative in both cases, the silica lining will be reduced by carbon in the molten iron.
For example, in a 35-ton, 7000kW line frequency coreless induction furnace, the lining throughput was 8000 tons of gray iron and only 2600 tons of ductile base iron.
Patch the coil grout when the lining has been removed to minimize avenues for CO and SO to escape and deposit.
Under these circumstances, the network stabilizes in balance with the thermal gradient and the lining performs well.
On a typical Saturday, the furnace lining is measured for wear using a centering bar with a plumb bob attached to a string.
Throwing water on a hot lining can be dangerous - operators must remain cautious when adding water to the furnace.
Therefore, careful attention and proper maintenance of a furnace's lining is vital to safe melting and holding.
Proper Installation - Proper lining installation is as important to a safe operation as refractory material selected.
Now that dry vibrated
linings seem to be the
linings of choice, monitoring of the conductance and/or reactance ratios doesn't provide metalcasters with all the information needed to determine the condition of the
lining.
Spalling occurs when layers of sintered refractory
lining suddenly "break" from the refractory wall.
Foundrymen today are as serious about conserving power by minimizing heat loss through a refractory
lining as were foundrymen during the previous energy crisis.
Each disadvantage was especially detrimental to Madison-Kipp's operation because the cyclical use of the ladle made the
lining susceptible to thermal shock and the constant demand for molten aluminum greatly reduced the time in which to make repairs.