Insulation Brick

Insulation brick belongs to a kind of lightweight insulation refractory materials, which has the advantages of low bulk density, light bulk density, low thermal conductivity and good heat insulation effect. So everyone who needs insulation bricks can buy them from Rongsheng Refractory Company according to their actual use. Welcome Contact us for free price list right now!

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High Quality Insulation Bricks For Sale In RS

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Insulation Brick Advantages

  • Low Bulk Density
  • Low Thermal Conductivity
  • Good Heat Insulation Effect
  • Lightweight And Energy-efficient
  • High Compressive Strength
  • Good Thermal Shock Resistance
Insulation Brick At RS Company
Insulation Brick At RS Company

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Insulation Bricks Composition

Insulation brick is mainly sintered using high quality clay as the main raw material at high temperature. Insulation brick has a lot of different types, and its density will also vary based on different models. The classification of bulk density of insulation bricks is quite different from that of heavy refractory bricks. The lower the bulk density of insulation bricks, the better the thermal insulation performance, and the aluminum content is basically the same.

Silica Insulation Bricks For Sale In RS Company
Silica Insulation Bricks

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Insulation Brick Uses

Being used as an insulating material for industrial furnaces, insulation brick can reduce heat loss in the kiln, saves energy, and reduce the quality of thermal equipments.

Typical Applications Of Insulation Brick:

  • Electrolytic Aluminum Industries
  • Iron & Steel Industries
  • Glass Industries
  • Ceramics Industries
  • Power Generation Industries
  • Non-Ferrous Metals Industries
JM Insulation Brick - Rongsheng Refractory Bricks For Sale
JM Insulation Brick

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The Classification Methods Of Insulation Brick

Insulation bricks, as the main products of kiln insulation, have an extraordinary performance in improving the insulation performance of kiln and saving energy. However, there are so many types of refractory insulation bricks. Therefore, if we want to choose suitable insulation brick, we need to use the physical and chemical specifications such as kiln use characteristics, temperature, refractory temperature and thermal conductivity of heavy refractory bricks as the main reference. The classification methods of insulation bricks mainly include the following types:

  1. Firstly, Operating Temperature. According to the use temperature, insulation brick can be divided into low temperature heat insulation brick (use temperature is 600℃~900℃), medium temperature insulation refractory material (use temperature is 900℃~1200℃) and high temperature insulation refractory material (use temperature is higher than 1200℃).
  2. Secondly, Bulk Density. Insulation brick can be classified into lightweight refractory bricks (bulk density 0.4~1.0g/cm3) and ultra-light refractory bricks (bulk density less than 0.4g/cm3) based on the volume density.
  3. Thirdly, Production Method. There are different ways to manufacture insulation bricks, such as  burning-out addition method, foam method, chemical method and multi-space material method, etc. Besides, insulation brick can also be classified into shaped insulating refractory product and monolithic refractory according to the shape.
  4. Fourthly, Insulation bricks can be classified into LG-MJ-NG-GG-GGR-PG-LGJ grades according to their types, and each grade is selected according to the requirements of its use.
Light Weight Clay Insulation Brick - Rongsheng Factory
Light Weight Clay Insulation Brick

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Types Of Insulation Brick

From above descriptions, we can know that insulation bricks have a number of different varieties, such as lightweight clay insulation brick, mullite insulation brick, alumina bubble brick, lightweight silica bricks, etc. Clay insulation bricks are the most widely used among them, both in thermal insulation and in industrial furnaces and thermal pipes, machinery, ceramics, and chemicals.

Insulation Bricks - Rongsheng Refractory Bricks
Insulation Bricks – Rongsheng Refractory Bricks

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Lightweight Clay Insulation Brick

Lightweight clay insulation bricks are usually used in the thermal insulation of industrial furnaces according to their functional characteristics, which can reduce the heat loss of the furnace and save power. The operating temperature of them is between 1200℃and 1400℃. The benefits of lightweight clay insulation bricks are outstanding features and low price quotes. So if you are looking for cheap insulation bricks with the best quality, just click here for free quotation.

Lightweight Clay Insulation Brick From RS Factory
Lightweight Clay Insulation Brick From RS

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Mullite Insulation Brick

Mullite insulation brick can directly touch the flame, whose refractoriness can reach above 1790℃, and the larger use temperature is between 1350℃ and 1450℃.

Mullite insulation brick has the characteristics of high temperature resistance, light weight, small thermal conductivity and remarkable energy saving effect. It is widely used in the cracking furnace, hot blast furnace, ceramic roller kiln, electric porcelain drawer kiln, glass crucible and various electric furnace lining.

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Mullite Insulation Brick Sales In RS

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Alumina Bubble Brick

Alumina bubble brick is made of alumina hollow spheres and alumina powder as the primary material, with the addition of other binders, fired at a high temperature of 1750℃. So it is a kind of energy-saving insulation material attributed to ultra-high temperature materials.

Alumina bubble brick is very stable in all kinds of atmospheres, especially used in high temperature furnaces at 1800℃. Alumina bubble bricks are widely used in the high-temperature, ultra-high temperature furnaces such as petrochemical industrial gasifiers, carbon black industrial reactors, metallurgical industrial induction furnaces, etc. according to their physical and chemical policies, and have achieved very good energy-saving effects.

Alumina Bubble Brick From RS With Low Price
Alumina Bubble Brick From RS

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Insulation Bricks Specification

Light Weight Clay Insulation Brick

Items NG-0.6 NG-0.8 NG-1.0 NG-1.3 NG-1.5
Maximum Service Temperature 1200 1280 1300 1350 1400
Bulk Densityg/cm3 0.6 0.8 1.0 1.3 1.5
Apparent Porosity, % 70 60 55 50 40
Cold Crushing Strength  (Mpa) ≥ 2.0 2.5 3.0 4.0 6.0
Reheating Linear Change (%)℃×12h ≤ 1300℃  -0.5 1350℃  -0.5 1350℃  -0.9 1350℃  -0.9 1350℃  -0.9
Thermal conductivity  W/(m·K) 600℃ 0.16 0.45 0.43 0.61 0.71
800℃ 0.18 0.50 0.44 0.67 0.77
Al2O3 40 40 40 40 42
SiO2 1.5 1.5 1.5 2 2
Fe2O3 55 55 55 55 55

Light Weight Silica Insulation Brick

Items QG-1.0 QG-1.1 QG-1.15 QG-1.2
SiO2  % ≥91 ≥91 ≥91 ≥91
Bulk Density  g/cm3 ≥1.00 ≥1.10 ≥1.15 ≥1.20
Cold Crushing Strength  MPa ≥2.0 ≥3.0 ≥5.0 ≥5.0
0.1Mpa Refractoriness Under Load   °C ≥1400 ≥1420 ≥1500 ≥1520
Reheating Linear Change (%) 1450°C×2h 0~+0.5 0~+0.5 0~+0.5 0~+0.5
20-1000°C Thermal Expansion Coefficient ×10-6-1 1.3 1.3 1.3 1.3
Thermal Conductivity  (W/(m·K)  350°C±10℃ ≤0.55 ≤0.6 ≤0.65 ≤0.7

Light Weight High Alumina Brick

LG-0.6 LG-0.8 LG-1.0
Bulk Density(g/cm3) 0.6 0.8 1.0
Cold Crushing Strength  (Mpa) 1.9 2.9 4.0
Permanent Linear Change 1300℃*12h(%) 0.5 0.5 0.5
Thermal Conductivity

Average Temperature 350±25℃ W/( m·K)

≤0.250 ≤0.320 ≤0.450
Refractoriness Under Load 0.1Mpa (℃)  1300 1350 1380
Al2O3(%) 50 52 52
Fe2O3(%) 1.8 1.6 1.5
Maximum Service Temperature (℃) 1300 1350 1380

Alumina Bubble Brick

  Unit 85# 90# 99#
Maximum Service Temperature 1680 1700 1800
Al2O3 % ≥85 ≥90 ≥99
SiO2 % ≤15 ≤8 ≤0.2
Fe2O3 % ≤0.2 ≤0.2 ≤0.2
Bulk Density g/cm3 1.4-1.7 1.4-1.7 1.4-1.7
Cold Crushing Strength MPa ≥12 ≥10 ≥9
Refractoriness Under Load (0.1MPa, 0.6%) ≥1650 ≥1760 ≥1760
Reheating Linear Change (1600℃*3h) % ±0.3 ±0.3 ±0.3
Thermal Expansion Coefficient

(Room temperature -1300℃)

×10-6-1 ~7.8 ~8.0 ~8.6
Thermal Conductivity

(Average temperature 800℃ )

W/(m·K) ≤0.8 ≤1.3 ≤1.5

JM Insulation Brick

Index Model Bulk Density

g/cm3

Reheating linear Change Cold Crushing Strength MPa Modulus of Rapture MPa Thermal Conductivity

350℃ W/(m·K)

Chemical Composition %
Al2O3 SiO2 Fe2O3
JM32 A 1.1 -0.8  1400℃*12h 3.6 1.9 0.43 75 23 0.4
B 1.2 -0.7  1400℃*12h 3.8 2.0 0.46 75 23 0.4
JM30 A 1.0 -0.8  1400℃*12h 3.0 1.8 0.40 72 26 0.5
B 1.1 -0.7  1400℃*12h 3.5 1.9 0.43 72 26 0.5
JM28 A 0.8 -1.0  1500℃*12h 2.5 1.4 0.28 64 33 0.7
B 0.9 -0.8  1500℃*12h 2.8 1.6 0.32 65 32 0.6
C 1.0 -0.7  1500℃*12h 3.5 1.8 0.34 66 31 0.6
JM26 A 0.7 -0.9  1400℃*12h 2.0 1.2 0.21 54 42.5 0.8
B 0.8 -0.7  1400℃*12h 2.5 1.4 0.25 55 41.5 0.8
C 0.9 -0.5  1400℃*12h 2.8 1.6 0.30 56 40.5 0.9
D 1.0 -0.5  1400℃*12h 3.2 1.8 0.32 56 40.5 0.9
JM23 A 0.5 -1  1300℃*12h 1.2 0.9 0.16 42 54 0.8
B 0.55 -0.6  1300℃*12h 1.3 1.0 0.17 42 54 0.8
C 0.6 -0.5  1300℃*12h 1.6 1.1 0.19 44 52 0.8
D 0.8 -0.4  1300℃*12h 2.2 1.3 0.24 45 51 0.9
E 1.0 -0.2 2.8 1.7 0.31 45 51 0.9

Insulation Brick Manufacturers

Rongsheng is a professional insulation bricks manufacturer and supplier in China. Various Cheap insulation bricks for sale, such as high alumina bricks, fire clay bricks, silica bricks, corundum bricks, magnesite bricks, and etc.

As is a refractory and thermal insulation material production enterprise, Rongsheng Refractory is a comprehensive enterprise integrating scientific research, testing, development, production, sales and customers. RS Factory possesses one production line of shaped and unshaped fire-resistant and wear-resistant products respectively, one production line of thermal insulation products, which is enough to meet the processing capacity of 80,000 tons of high-quality products per year. In addition, Rongsheng has a furnace construction team with professional anti-corrosion and heat preservation engineering level and kiln masonry second-class qualification. So you can feel free choose RS to be your partner! And Contact us for more details right now!

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