Home > Products > Bubble Alumina Brick and Insulating Firebrick

Bubble Alumina Brick. We stock in both 2.5 & 3” sizes. We also carry double bump interlocking anchor styles. For use up to 1800C, these brick have excellent insulating properties as well as high hot strengths.

Insulating Firebrick. We carry BNZ
BNZ produces thirteen types of Insulating Fire Brick (IFB) for use in applications from 2,000°F (1,093°C) to 3,200°F (1,760°C). Each type is formulated to meet specific thermal and physical requirements and after firing is machined to precise tolerances.

Made from high purity refractory clays and other ceramic raw materials, these IFB contain a carefully graded organic filler which is burned out during manufacture to give a uniform controlled pore structure.
Advantages

High Insulating Value
The light weight and high insulating value of BNZ IFB make possible thinner furnace walls, improved efficiency and lower operating costs.

Strong
The high compressive strength of IFB allows for self-supporting structures at elevated temperatures. IFB are compatible with dense fire brick and add strength to the whole construction.

Low Heat Storage
Lower heat storage versus dense brick means reduced fuel costs in cyclically operated heating equipment.

High Purity

BNZ IFB are low in impurities such as iron which can adversely affect refractory performance in many applications. They are used in many furnaces operating with a controlled atmosphere.
Accurate Dimensions

Because BNZ Insulating Fire Brick are machined to precise dimensions, courses can be laid quickly and easily. The result is a stronger, tighter refractory lining resulting in less heat loss through the joints.

Typical Applications
Recommended for use as primary hot face refractory linings or as back-up insulation behind other refractories in furnaces, flues, kilns and similar high temperature industrial equipment.

Size is no obstacle. Most BNZ IFB are available in Zelie Jumbo™ series, which require no mortar joints to produce sizes up to 24"x9"x3". No longer are there design limitations caused by traditional standard brick shapes and sizes. The nominal cost of Zelie Jumbo™ sizes is more than offset by the elimination of many mortar joints and significant labor savings.