Can-Eng Furnaces International Ltd., Niagara Falls, N.Y, has successfully started up two rotary screw hearth bar quench and temper furnace lines.

The first project, installed in Detroit, processes steel bars in the range of 1 to 12" by 25' long at a maximum production rate of 25,000 lb/hr. Each plant layout is a compact U-shape design that utilizes regenerative burner technology on the rotary screw hearth hardening furnace, discharging a single bar at a time into the water-spray quench system, followed by rotary screw hearth tempering.

The second project, installed in the Chicago metro area, processes small-diameter bar in the 0.75 to 4" range in 25' lengths at a maximum production rate of 13,500 lb/hr. 

Both systems are capable of producing commercially straight bars without the need for post-heat-treatment straightening, employ Level II Automation System (SCADA), and came complete with fully automated material handling, debundling and loading systems. The contracts were executed for different customers. They came on-stream in the third quarter of 2012 and the first quarter of 2013 respectively.

The furnace systems incorporated the latest in screw hearth furnace evolutionary technology, including enhanced screw profile, high-temperature alloy rail supports and non-water-cooled cantilevered roller discharge. The Can-Eng scope of supply included the water cooling circuit, and primary- and secondary-scale removal systems.