Adidas offers a full line of women's wear, including bra tops, shorts, and mini shorts of cotton/spandex with CoolMax/Lycra linings
. Tank tops, tights, crop tops, and unitards fill out the line.
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.
The CO then diffuses through the melt (like the water vapor) and back into the lining. The CO seeks to escape through any aperture available, which means it usually exits through cracks in the coil grout as well as around the top and bottom ends of the coil.
C production and deposition can take place at any time, but is particularly rapid during and shortly following furnace startup because the moisture in the lining provides a concentrated source of O in the right place.
A lining 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.
Even though the foundry eventually changed its carbon raiser, the major goal of the department was to further extend the life of the lining - instead of just solving the problem, they wanted to better the operation.
Runouts occur when molten metal breaks through the furnace lining
. If cooling, electrical, hydraulic or control lines become damaged, there may be an imminent danger of a fire or water/molten metal explosion.
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.