Tunnel furnaces (or roller hearth slab reheat furnaces) provide one of the toughest environments for cast steel fabrications. With temperatures approaching 2300° F, these rolls are expected to carry the full weight of the slab being heated to rolling temperatures. Duraloy's dry rolls, manufactured in our proprietary alloys, have proven themselves as the best rolls in the world. Dry rolls provide several advantages over "wet" or water-cooled rolls. First, in a tunnel furnace transfer car, they eliminate the need for flexible water hoses to be hanging from the shuttle. Dry rolls minimize heat loss in the furnace, reducing energy consumption. Duraloy's proprietary MO-RE 2150® alloy has allowed furnace operators to retrofit entire furnaces with dry rolls.
Water Cooled Tunnel Furnace Roll Assemblies
Water cooled furnace roll assemblies
Water cooled rolls are found in CSP tunnel furnaces around the world. The rolls have a carbon steel tubular shaft with a stainless steel "corebuster" installed in the shaft to direct water flow through the roll. Cast tyres are then welded to the shaft to provide the carrying surface for the slabs in the furnace. The areas between the tyres are covered with a castable ceramic material to insulate and protect the shaft. Duraloy has supplied thousands of water cooled rolls.
Tunnel furnaces (or roller hearth slab reheat furnaces) provide one of the toughest environments for cast steel fabrications. With temperatures approaching 2300° F, these rolls are expected to carry the full weight of the slab being heated to rolling temperatures. Duraloy's dry rolls, manufactured in our proprietary alloys, have proven themselves as the best rolls in the world. Dry rolls provide several advantages over "wet" or water-cooled rolls. First, in a tunnel furnace transfer car, they eliminate the need for flexible water hoses to be hanging from the shuttle. Dry rolls minimize heat loss in the furnace, reducing energy consumption. Duraloy's proprietary MO-RE 2150® alloy has allowed furnace operators to retrofit entire furnaces with dry rolls.
Water Cooled Tunnel Furnace Roll Assemblies
Water cooled furnace roll assemblies
Water cooled rolls are found in CSP tunnel furnaces around the world. The rolls have a carbon steel tubular shaft with a stainless steel "corebuster" installed in the shaft to direct water flow through the roll. Cast tyres are then welded to the shaft to provide the carrying surface for the slabs in the furnace. The areas between the tyres are covered with a castable ceramic material to insulate and protect the shaft. Duraloy has supplied thousands of water cooled rolls.
