Insulating fire bricks are a kind of light-weight thermal insulation refractory materials, mainly made of high-quality clay as the main raw material through high-temperature sintering. Insulating fire bricks are featured with low bulk density, light in weight, low thermal conductivity, and good thermal insulation. Insulating fire bricks are mainly used for industrial, industrial kiln, furnace, glass smelting furnace. Insulating fire bricks are used all over the world to protect structures from heat and prevent fires in chimneys, kilns and furnaces. If you want to gain more information about insulating fire bricks, please contact us right now!

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What is An Insulating Fire Bricks？

Insulating fire bricks belong to a kind of light-weight thermal insulation refractory materials, which is made of high-quality clay as the main raw material through high-temperature sintering. Insulating fire bricks are mainly used for insulating layer of kiln and furnace to prevent the temperature losing.

Insulating Fire Bricks for Sale

Insulating Fire Bricks for sale in RS kiln Refractory company are a kind of firebrick that made of high-purity refractory clay, with the additions of alumina. It is mainly used for insulating layer of kiln and furnace to prevent the temperature losing and used all over the world to protect structures from heat and prevent fires in chimneys, kilns and furnaces.

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Insulating Fire Brick Properties

As a heat insulation material of industrial furnaces, heat-insulating fire bricks can reduce heat loss in the kiln, save energy, and alleviate the quality of thermal equipment. Generally speaking, insulating fire bricks can be classified into clay insulating fire bricks,high alumina insulating fire bricks, mullite insulating fire bricks and alumina hollow ball insulating fire bricks.

High alumina insulating fire bricks are featured with good insulation performance, high temperature resistance, and light weight, etc.

Mullite insulating bricks have the advantages of high refractoriness, good thermal shock resistance, excellent insulation performance, and high compressive strength, etc.

And alumina bubble insulating fire bricks have good performance in light weight, high mechanical strength, high compressive strength, good thermal shock resistance, low thermal conductivity, and save energy, etc.

Therefore, the properties of insulating fire bricks can be summarized as the following points:

High compressive strength

High mechanical strength

High temperature resistance

Good thermal shock resistance

Low thermal conductivity

Light in weight

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Insulating Fire Bricks Composition

Many different types of refractory materials can be used in the manufacture of insulating fire bricks, such as gemstones, refractory clay, bauxite, refractory cement, drift beads, quartz sand, aluminum silicate fiber cotton(board), asbestos sheet, perlite,etc. However, insulating fire bricks are generally made from a refractory clay or some other type of raw ceramic material.

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Insulating Fire Bricks Density

Insulating fire bricks have lots of different types, so the density of insulation fire bricks will vary. The classification of bulk density of insulating fire bricks is very different from that of heavy firebricks. The lower the bulk density of insulation fire bricks, the better the insulation performance, and actually, the aluminum content is basically the same.

Insulating Fire Bricks Price

Insulating fire bricks price from RS Refractory Online Sale is much cheaper than that of the other suppliers. Besides, RS company has established cooperative relationships with India, Iran, Pakistan, Bangladesh, Japan, Vietnam, Kazakhstan, Russia, southeast Asia and other countries and regions with its good corporate image, good reputation, strict quality management system, professional sales and after-sales service team.

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How are Insulating Fire Brick Made

The way in which insulating fire bricks are made depending greatly upon the materials being used, in most cases it starts out with a material known as fireclay. It is fired inside of a kiln until it is partially turned into glass and may sometimes be glazed depending upon how it is intended to be used. They come in standard sizes for the most part, but they also come in a “split” form which is half of the standard thickness. The main function of insulation fire brick is to keep heat and reduce heat loss. Insulation bricks generally do not directly contact the flame.

Insulating Fire Bricks Recipe

Insulating fire brick recipe is the light insulation material.

Insulating Fire Bricks Classification

According to Insulating fire bricks’ bulk density, they are classified in the following parts: 0.6, 0.8, 1.0, 1.2, 1.3 (g/cm3, refractoriness 1600℃-1730℃).

According to the composition of the insulating fire bricks, they can be divided into the following categories:

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Fire Clay Insulating Fire Bricks

Fire clay insulating fire bricks are an insulating refractory product made of refractory clay as the main marerial, with the addition of 30% to 48% alumina content. The production process uses the burn-in addition method and the foam method. Refractory clay, floating beads, and refractory clinker were used as raw materials, mixed with binder and sawdust, by mixing, forming, drying and firing to obtain a product with a bulk density of 0.3-1.5 g/cm3. The output of clay insulation fire bricks accounts for more than half of the production of insulation firebricks. Clay thermal insulation fire bricks are used in a wide range of applications and are used in the thermal insulation layer of thermal equipment and industrial furnaces.

Physical and Chemical Indicators of Fire Clay Insulating Fire Bricks Item/Products RS-PNG-1.3 RS-PNG-1.0 RS-PNG-0.8 RS-PNG-0.5 RS-PNG-0.3 Al 2 O 3 % ≥ 42 42 42 40 40 Bulk Density/g/cm3 ≤ 1.3 1 0.8 0.5 0.3 Cold Crushing Strength/MPa ≥ 8 6 4 2 1 Refiring Linear Change/≤2℃ 1400 1350 1250 1150 1100 Thermal Conductivity Coefficient W/m.k 0.55 0.4 0.35 0.25 0.18 Average Temperature(350℃±25℃) ≤

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High Alumina Insulating Fire Bricks

High alumina insulating fire bricks are another new type of light refractory product developed by RS company according to market needs. High alumina insulation fire brick has the advantages of high temperature resistance, low thermal conductivity, low iron content, high compressive strength, and good thermal stability, and can be directly used as an industrial kiln.

Physical and Chemical Indicators of High Alumina Insulating Fire Bricks Item/Products RS-PD-1.2 RS-PD-1.0 RS-PD-0.8 Al2O3% ≤ 65 60 60 Fe2O3% ≤ 1.0 1.0 1.0 Bulk Density/g/cm3 ≤ 1.2 0.8 0.8 Cold Crushing Strength/MPa≥ 8.0 5.0 5.0 Refiring Linear Change℃xh≤2% 1400*12 1400*12 1400*12 0.1MPa Refractoriness Under Load℃≥ 1450℃ 1400℃ 1400℃ Thermal Conductivity Coefficient W/m.k≤ 200℃ 0.38 0.28 0.24 400℃ 0.4 0.3 0.27 800℃ 0.44 0.35 0.32

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Mullite Insulating Fire Bricks

Mullite insulating fire bricks generally contain Al2O3 content of between 65% and 75%. Mullite insulation fire bricks have high refractoriness( up to 1790℃) and excellent thermal shock resistance.

Physical and Chemical Indicators of Mullite Insulating Fire Bricks Item/Products P=0.8 P=1.0 P=1.2 Al 2 O 3 % ≥ 50~70 65~70 79 Fe 2 O 3 % ≤ 0.5 0.5 0.5 Bulk Density/g/cm3 0.8 1.0 1.2 Cold Crushing Strength/MPa 3 5 7 Thermal Conductivity Coefficient(350℃)W/m.k 0.25 0.33 0.42 Refractoriness Under Load(℃) (0.2Mp,0.6%) 1400 1500 1600 Refiring Linear Change%(1400℃*3h) ≤0.9 ≤0.7 ≤0.5 Long-term Use Temperature(℃) 1200~1500 1200~1550 1500~1700 Classification Temperature(℃) 1400 1550 1600

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Alumina Bubble Insulating Fire Brick

Alumina Bubble Insulating fire bricks are produced by high-temperature firing in a shuttle kiln. Alumina hollow spheres are used as the main raw material, high-performance micro-powders are used as additives, and organic materials are used as temporary bonding agents. Alumina hollow ball insulation fire brick contains a large number of closed holes, which have the advantages of light weight, high temperature resistance, good thermal insulation performance, and excellent thermal shock resistance. Alumina Hollow Ball Insulation fire bricks can be directly contacted with flames, suitable for hot air furnace, heating furnace, tunnel kiln, push plate kiln and various electric furnaces, electric kiln lining.

Physical and Chemical Indicators of Alumina Bubble Insulating Fire Bricks Item/Brand RS-90 RS-95 RS-98 Al 2 O 3 % ≥ 90 95 98.5 SiO2% ≤ 8 4 0.5 Fe 2 O 3 % ≤ 0.3 0.2 O.2 Bulk Density/g/cm3 1.4~1.7 1.4~1.7 1.5~1.8 Refractoriness Under Load℃(0.1MPa 0.6%) ≥1680 ≥1700 ≥1700 Cold Crushing Strength/MPa ≥20 ≥18 ≥15 Heavy Burn Line Rate % ±0.3 ±0.3 ±0.3 (1600℃*3h) Thermal Conductivity Coefficient W/(m.k) ≤ 1.2 ≤1.5 ≤1.8 (Average Temperature800℃) Rervice Temperature(℃) 1700 1750 1800

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Insulating Fire Bricks Suppliers/Manufacturers

RS Manufacturer is one of famous insulating fire bricks suppliers, selling different kinds of insulating fire bricks. RS Kiln Refractory focuses on business model innovation, actively expands e-commerce, and is committed to creating a “one-stop” e-commerce operation service platform that integrates cross-border e-commerce and industry incubation. Since the establishment of the company, it has successively been awarded the title of “Vice-Chairman Unit”, “Integrity Demonstration Unit”, and “Hundred Million Net Merchant Award” by relevant organizations such as Henan International Trade Network Business Association. So please feel free to contact us for obtaining what you want!

