This article will look at the possible causes of coreless induction furnace lining wear, and explain why melting ductile iron will cause a more aggressive reduction of the silica lining than when melting gray iron.
Historically, lining wear has been attributed to the reduction of the silica lining by carbon dissolved in the melt.
life of 2 weeks was unacceptable for the melt department, especially after the crew learned that the foundry was about to begin pouring 6 days/week.
Proper furnace maintenance is the key to maintaining the integrity of the furnace lining
and thus, preventing a runout.
Thus, the subjects of why the saturation network forms, how the saturation network moves through the lining
, and what can be done to keep the saturation network from contracting the bushing joint insulator are important ones to address.
To cure this problem, foundries must minimizes the thermal shock conditions a silica refractory experiences by optimizing the cooldown and heatup of the refractory lining
As with all refractory applications, the channel furnace operator must continually work with the refractory and furnace suppliers for optimum lining
With the castable lining
, we couldn't hotpatch repairs," said Dan Keyes, Madison-Kipp's refractory specialist, who is responsible for all refractory maintenance.