Insulfrax LT: A Low Bio-Persistent Fiber Blanket with Improved Performance

When it comes to high-temperature furnace lining applications, using low bio-persistent fiber (Body Soluble) thermal blankets as furnace linings has three key benefits. 

First, they meet any airborne silica requirements, second, they provide reduce your carbon footprint, and finally, they provide excellent thermal conductivity and thermal shock resistance.

What’s more, they are an excellent alternative to traditional alumina/silica refractory ceramic fiber blankets, especially if your company prohibits the use of respirable ceramic fibers with a warning label. These blankets also have improved tensile strength from previous versions.

The best kinds of thermal blankets for refractory linings, thermal insulation, consumables in steel and aluminum melt shops, molten metal transfer, power generation, and appliances are made from a calcium, magnesium, and silicate chemistry to provide thermal insulation for a classification temperature of 2192^oF (1200^oC). Material characteristics of this needled blanket include flexibility, strength, and light weight. The mechanical needling of the spun fibers eliminates the need for binders during production, which gives the product a high tensile strength.

When considering a thermal blanket, it is also important to make certain the material is inorganic to avoid the generation of smoke or outgassing while in service and that it is available in a range of thicknesses, densities, widths, and lengths. Typical thicknesses are ½”, 1”, 1.5”, and 2” while densities are 4, 6, and 8 PCF (pounds per cubic foot), widths are generally 24” and 48” and lengths are 12.5’ and 25’. Chiz Bros can offer custom sizes upon request.

Typical applications include:

• Power Generation -- Heat Recovery Stream Generator (HRSG), Duct Insulation, Gas Steam Turbines, Turbine Exhausts, Silencer Panels, and Boiler & Duct Insulation
• Appliance -- Residential Ovens, High Temperature Commercial Cooking Appliances, Hearth Chimney Insulation, and High Temperature Gaskets
• Non-Ferrous (Aluminum) -- Aluminum Transfer Ladle Covers, Aluminum Melting/Holding Furnace Doors, and Carbon Backing Furnace Covers
• General Use & Other Industries (Petrochemical, Ferrous, Pollution Control, etc.) -- High Temperature Furnaces, Boilers & Fire Heaters, Backup Insulation, High Temperatures Seals & Gaskets, Heat Shields & Maintenance Blankets, Expansion Joints, Stress Relieving Blankets, Glass Tank Crown Insulation, FLue Insulation, and Regenerative Thermal Oxidiers (RTOs).

The Proof is in the Numbers

One of the most effective thermal insulating blankets that we supply is Insulfrax® LT Blanket. Our customers are pleased with its safety and durability, with the average product lifespan measured in years instead of hours. To get a better understanding of the characteristics of a highly functional thermal blanket, see this chart that lists product parameters.

To determine the ideal thermal blanket for your production environment, it is best to use a Heat Flow Calculator to help you determine cold-face furnace temperatures with furnace linings of various thicknesses subjected to specific amounts of heat. At Chiz Bros., our team of technical experts can assist you with this step of the information-gathering process.

To benefit from a strong combination of technical expertise and quality products...