Graymont Superior Plant Superior,WI

Project Description: Krech Ojard performed engineering services on this large Graymont quicklime and limestone facility in Superior, Wisconsin. Krech Ojard was hired to design all of the refractory, process, and storage equipment, on pile and helical anchor deep foundations, to support the installation of a new kiln #5, a state of the art high efficiency preheater lime kiln. Additional work focused on development of “Balance of Plant” process flow, conveyor systems, silo dust control, dust collector upgrades, crushing and screening operations, material re-claim tunnel, integrated rail and truck load-out systems, as well as significant structural modifications to existing buildings to support the new process equipment.



KILN #5 ERECTION SHORING
The staged erection and welding of a 13’ diameter steel rotary kiln shell required the design of custom saddles, shoring towers, and timber crib foundations. The design considered kiln alignment requirements, poor soil conditions, and lateral bracing requirements during the construction phase.

CV-322 CONVEYOR RIGGING ANALYSIS
A 160-ft box truss conveyor galley was designed and then modified to accommodate a two crane lift arrangement with a mid-air splice connection.