Aluminum Furnace Maintenance Tips

Repair insulation surface liner when damaged to protect the softer back up material

• Metal liner
• Mesh & Mortar
• Castable insulation in car tops and floors

• Mechanical damage - wrecks
• Air flow erosion - usually starting from mechanical damage
• Exposed back up material to high velocity air flow
• Severe vibration from an unbalanced fan 

Metal Liners

Insulation repair in metal lined furnaces can be difficult because you can not replace a piece of liner until you have a piece to replace it with. This means that the maintenance staff needs to order a sheet of stainless steel, cut it to the correct size and punch holes in it, etc.  This kind of project usually can be done in a few days, but it can take longer depending on the availability of material.

SECO/WARWICK Mesh & Mortar Surface Treatment

In a furnace lined with mesh and mortar, the repairs can be made in just a few hours with some back up material, a roll of wire mesh and a can of mortar that are inexpensive enough to stock in-house, or can be ordered directly from our SECO/WARWICK inventory. 

Back up material is used to fill any voids, then a patch is cut from the wire mesh, applied to the damaged area, and mortar is painted over the patch.

Floors

Floors are sometimes metal lined, but more often, we use about 5" of insulating castable covered with 3" of hard castable that doesn't dust.  This type of floor rarely needs repair.  When it does, almost any hard castable can be used for the hot face.

The latest design, materials and equipment specifications should be obtained from the company before any reliance is placed on the enclosed since changes may occur due to product improvement.