Refractory Anchors

Refractory anchors are a critical component that hold refractory linings to the unit. Like nails or screws in your wall, refractory anchors play a considerable role, despite being a seemingly small component. If you’re looking to build or replace a furnace, forge, or kiln, refractory anchors are a necessity. 

Refractory anchors “anchor” and hold the lining to the walls of your furnace. In high-heat applications, they act as a protective component—keeping the liner in place so extreme temperatures stay where they belong- inside the furnace. Anchors are used in all refractory industries. 

A Little Component with a Big Job

Anchor failure can lead to complete refractory failure. Likewise, when an anchor is compromised, there’s a lack of support for the shell and lining, causing eventual degradation and even collapse. That’s why it’s crucial to choose the proper refractory components and anchors that are best suited for each application.

Refractory anchors come in several different forms, and many different metals, but they all essentially do the same critical job—they’re welded to a steel shell whenever refractory is installed. Refractory anchors keep the insulating material attached to the shell wall. The metallic anchors are often deeply embedded into the material, having to withstand expansion, contraction, other environmental factors. 

The most common form of refractory anchor is the V-Anchor. They vary in size between 1 and 20 inches, depending on the thickness of the application. Anchor materials are typically stainless steel or carbon steel, but specialty ceramic versions exist as well.

At RSI, we carry all the varieties of refractory anchors you need, along with our other refractory materials and components. This makes it easy for our customers to get exactly what they need in one place, ensuring that every component of your lining is compatible and the best suited for their applications.

Types of Refractory Anchors at RSI

We carry an array of refractory anchors covering most grades of stainless steel and carbon steel. Mild steel generally starts to degrade at higher temperatures, so for most applications, we recommend 310 stainless steel—which can withstand an astounding 3000 degrees. We also carry specialty ceramic anchors and screws. 

We offer different-shaped anchors for different applications and purposes, including specialty refractory anchors for fiber and plastic. We carry “twist-lock” anchors that work well with fiber materials. 

A few examples of our popular refractory anchors include:

• RAO6: Split-tine anchors that you can weld in place, split, and then bend and form into your desired shape.
• RA46, RA52 & RA57: Bottle tile anchors, ideal for thicker applications, including specialty fire brick anchors. 
• RA59: Heat-resistant plastic anchors, including Hexmesh anchors.