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This California customer had operated a Cedarapids parallel flow drum plant a number of years. With changing regulations, it was important for them to change to counterflow technology, both from an emissions standpoint as well as increasing the ability to run recycle. Stansteel completed a successful conversion by reusing the existing Cedarapids plant equipment including material feed, silo equipment, air pollution, etc.

A straight counterflow drum was designed including extended nose, Hauck highly efficient Eco-Star II burner. A primary knockout box was installed based on the high volume of dust particle carryout on the counterflow drum versus the parallel flow. The unit has been installed and operating successfully for three seasons.