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Furnace line for heat treatment of conveyer type

Typical applications for insulating bricks

insulating firebrick LBK

Hot face expose and back-up lining of Annealing Furnace, Carburizing Furnace, Galvanizing Furnace, Forge Furnace, Carbon Baking Furnace, Heat Treating Furnace, Hot Stove, Coke Oven, Oil Heater, Cracking Furnace, Reformer, lncinerator, Ceramic Firing Kiln, zinc Distillation Furnace, Atmosphere Furnace, Glass Furnace etc.

Isolite manufactures and sells high temperature fireproof insulation materials, such as insulating firebricks and high temperature insulation wool, to contribute to energy conservation in the thermal industry.

Isolite is working on R&D based on ceramic porosification technology for insulation at ultra-high temperatures exceeding 1000°C.

These products are playing an active role not only in energy saving in the thermal industry, but also in a wide range of other areas such as disaster prevention, composite materials and environmental conservation.

Ceramic Porosification Technology

During Isolite’s over 80-year-long history, we have accumulated techniques to porosify ceramics, and devoted ourselves to further research. Porosification technology can impart various functions to products by applying and combining techniques such as selection of pore shape, control of pore diameter, adjustment of porosity and material optimization. Here we introduce three main ceramic porosification technologies Isolite has established.

Method Of Adding Pores Internally
Method of adding
Pores internally
Method Of Making Layers Of Inorganic Fibers
Method of making Layers
of inorganic Fibers
Method Of Forming Porous Particle Aggregates
Method of forming porous
Particle Aggregates

Method of making Layers of inorganic Fibers

The technique of making layers of inorganic fibers is used for secondary processed products made from ceramic fiber. By making layers of ceramic fibers in air and needle punching, it becomes a flexible blanket shape. When inorganic fibers are layered in water, it is possible to make into various shaped products which is lightweight and durable with a bulk density of 250 kg/m3.

Method of adding pores internally

insulating firebrickTechniques for adding internal pores are mainly used for insulating firebricks.

The main effect is to reduce thermal conductivity (improving thermal insulation) and realize lightweight.

We have established a technology to produce low-density insulating firebricks with a bulk density of 1.0 g/cm3 or less from high density raw materials such as silica and alumina.

Various physical properties can be added by selecting the pore volume, pore diameter and pore shape.

As processing becomes easier by adding pores, it is possible to meet complicated shape requirements.

Method of forming porous Particle Aggregates

diatomiteThe technique of forming porous particle aggregates is mainly used for products using diatomaceous earth. By forming the large number of porous particle aggregates contained in diatomite (called diatomaceous shells) into a brick shapes or granules. By firing at high temperature, functions such as thermal resistance, superior water absorption, oil absorption, water retention, moisture conditioning and thermal insulation can be imparted.

Moreover, it is utilized as a product that demonstrates excellent performance as an oxygen adsorber catalyst, a carrier of microorganisms, a water absorbing material, and an oil supply material, taking advantage of its high porosity and strength.

LBK Super Lightweight Insulating Firebrick

LBK Super Lightweight Insulating Firebrick

LBK Series are the world’s highest level of super lightweight Insulating Firebrick.

LBK Series are using for Hot Surface and Back-up lining insulation, and it has a characteristic of light weight, low thermal conductivity, low heat storage, small reheat shrinkage, high thermal stability and suitable for superior resistance to reductive atmosphere.

Hot face expose and back-up lining of Annealing Furnace, Carburizing Furnace, Galvanizing Furnace, Carbon Baking Furnace, Heat treatment Furnace, Hot Stove, Clacking Furnace, Reformer, Incinerator.

Technical Specification of insulating Firebrick LBK series

SpecificationReheat Shrinkage not more than 0.5% when tested at (°C)120013001400150015501600
Cold Crushing Strength [MPa] JIS R 26150.59≦0.78≦0.98≦2.0≦3.0≦3.0≦
Modules of Rupture [MPa] JIS R 26190.49≦0.69≦0.78≦1.0≦1.5≦1.3≦
Thermal Conductivity at 350°C±10°C [W/m×K] JIS R 26160.17≧0.19≧0.24≧0.27≧0.30≧0.37≧
Chemical Composition Fe2O3 (%)1.5≧1.5≧1.0≧1.0≧1.0≧1.0≧
Test ResultBulk Density (g/cm3)0.480.520.590.700.750.8
Cold Crushing Strength [MPa]JIS R 26151.
Modules of Rupture [MPa] JIS R 26191.
Thermal Conductivity at 350°C±10°C [W/m×K] JIS R 26160.
Rehear Shrinkage (%) at ( t )°C × 8 hr JIS R 2613:19850.03(1200)0.19(1300)0.14(1400)0.10(1500)0.33(1550)0.26(1600)
Chemical Composition (%) Al2O3414157726971
JIS R 2216 SiO2515139263028

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