The furnace's bag-house system is perhaps its most notable feature. The furnace has two parallel exhaust lines leading to two large, separate bag houses. German company Beth GmbH supplied the system. When you look at our mill, you think it is a bag house with a little furnace next to it. One bag house collects that dust.
Operators then direct the dust released during the refining period into the other bag house.
Normally, you would have to pay the nonferrous industry to take your dust. But our dust is so concentrated with zinc that we pay very little. Bender Corp. helped design GMH's melt shop. But this can lead to zinc deposits in the steel, he says. By separating the dust, GMH can recycle the iron-rich dust without hurting the steel's quality.