When a magnesium fire destroyed a furnace at a Midwest primary metal producer, LEWCO, Inc., Sandusky, OH responded to deliver a large 1000˚F roller hearth furnace in (7) months. The turnkey project included design, manufacture, installation and commissioning.
Designed primarily for preheating coils, the five-zone conveyor oven has a capacity of 180,000 lbs. when fully loaded. The hot zone is 15 ft. wide x 85.5 ft. long x 9 ft. high. Four of the five zones deliver vertical down air flow to the workspace. The first zone however, which can be separated from the rest of the furnace by a guillotine divider door, features dual air flow to support a proprietary process. In effect the equipment can be operated as a 5-zone, pass through furnace or (2) independent furnaces operating at different temperatures and accommodating load/unload sequences at the same end.
The roller hearth is “loop-to-loop”, chain-driven live roller conveyor featuring 6” diameter alloy steel rollers on 12” centers. The conveyor system is divided into (16) zones, each on a separate drive, which permits zone accumulation capability. In automatic mode, the furnace can be fully loaded, filling zone by zone, and then unloaded without operator intervention.
LEWCO, Inc. is an industry leader in all types of continuous process conveyor ovens & furnaces.