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Aug 19, 2023
Inorganic Insulation Boards

An inorganic thermal insulation board is a new type of refractory thermal insulation material processed by a large-scale automatic continuous production line using pure inorganic materials. The use temperature ranges from 900°C to 1300°C, and it can be used as a backing for various industrial kilns, which is a good solution to the heat insulation problem of the kiln. The bulk density can be processed and produced from 0.35 ~ 0.4 ~ 0.45 ~ 0.5. Under the condition of a working temperature of 350℃, the thermal conductivity can be controlled in the range of 0.11 ~ 0.13, and the strength can be controlled in the range of 1 ~ 2Mpa. It can not only be processed into ordinary shapes but the maximum size can be processed into a size of 1 meter * 2 meters.

RS New Inorganic Thermal Insulating Boards
RS New Inorganic Thermal Insulating Boards

Advantages of Inorganic Insulation Panels

It can be used to replace the following insulation material products, such as a 1260-type aluminum silicate fiber backing board, and 1400 type aluminum silicate fiber insulation board. Advantages of inorganic thermal insulation panels in production and use. In the production of inorganic thermal insulation panels, it is more environmentally friendly and efficient. Its performance is not easy to shrink, not easy to pulverize, small thermal conductivity, no attenuation of heat preservation effect, long life, more energy saving, and higher cost performance.

Main Features of Inorganic Thermal Insulating Boards

Low thermal conductivity, more energy-saving. The composition structure of inorganic heat insulation boards from RS kiln Refractory Factory is composed of nano micropores, so the product has good heat insulation performance.

No shrinkage and small gaps after heating. Within the specified operating temperature, the heating permanent line change rate of the New Inorganic Thermal Insulating Boards is less than 0.5%, and it will not shrink after long-term use. For ordinary thermal insulation boards, the heating permanent line change rate reaches 2%-3% shrinkage. The shrinkage is more than 4 times that of the New Inorganic Thermal Insulating Boards.

Completely free of fiber and organic matter, it can be used for a long time under various working conditions. No chalking, no attenuation.

High strength and wide application range. The New Inorganic Thermal Insulating Boards from the RS kiln Refractory Factory have better compressive strength at room temperature. Compared with ordinary thermal insulation boards, its normal temperature compressive strength can reach more than 3 times, and it also has good strength after burning. Long-term use at high temperatures is more secure and has a wider range of use.

The Inorganic Thermal Insulating Boards have no stimulation to the human body and no pollution to the environment. The construction is convenient, healthy, and environmentally friendly.

RS kiln Refractory Factory Inorganic Thermal Insulating Boards have good quality control and a large production capacity. It is not restricted by environmental protection, and the delivery time is guaranteed.

Inorganic Thermal Insulating Boards in RS Kiln Refractory Factory
Inorganic Thermal Insulating Boards in RS Kiln Refractory Factory

Index Parameters of Inorganic Thermal Insulating Boards

Classification Model RS-B0.35 RS-B0.55 RS-B0.6
BD,（g/cm3） ≤0.35 ≤0.55 ≤0.6
CCS,（Mpa） ≥0.8 ≥2.0 ≥2.0
TC,400℃（W/m·K） ≤0.105 ≤0.115 ≤0.12
PLC,% ±0.5%
950℃×12h		 ±0.5%
1050℃×12h		 ±0.5%
1250℃×12h

Dimensional Requirements for Inorganic Thermal Insulation Panels

  1. Regular size: 400 x 600mm, thickness 30-80mm.
  2. Special sizes can be customized according to drawings.

Application of Inorganic Thermal Insulating Boards

Inorganic Thermal Insulating Boards products in RS Kiln Refractory Factory can be applied to the following scenarios: backing insulation lining of heat treatment furnaces in the metallurgical industry, steel rolling heating furnaces, and other kilns. The backing insulation lining of kilns such as roller kilns in the ceramic industry; the backing insulation lining of kilns such as calciners in the cement building materials industry. The backing insulation lining of kilns such as electrolytic cells in the electrolytic aluminum industry; the backing insulation lining of kilns such as cracking furnaces in the chemical industry.

Application of Inorganic Thermal Insulating Boards
Application of Inorganic Thermal Insulating Boards

Ceramic industry roller kiln backing plate

  • Application location: ceramic roller kiln wall heat insulation backing board, bottom backing heat insulation layer.
  • Can be used to replace, 1260 aluminum silicate fiber backing board, and 1400 aluminum silicate fiber insulation board.
  • Application advantages: not easy to shrink, not easy to pulverize, not easy to decay in performance, and more cost-effective.

Regenerators for the glass industry

  • Application location: wall insulation of glass furnace regenerator.
  • Can be used to replace: 1260 aluminum silicate fiberboard, and 1400 zirconium-containing aluminum silicate fiberboard.
  • Application advantages: no shrinkage, performance is not easy to decay, all inorganic.

Inorganic Insulation Board for Sale from Refractory Factory

ZZRS Refractory Factory is a team dedicated to refractory lining solutions for high-temperature industrial furnaces. Our customers are located in more than 100 countries and regions all over the world. RS kiln Refractory Factory refractory brick products and insulation products have significantly longer service life than those refractory products that customers have used before. The performance of our refractory products has also been unanimously recognized by customers. Now, our new insulation material products are dedicated to solving the configuration of refractory materials for the insulation layer of the rotary kiln, such as the new Inorganic Thermal Insulating Boards. Reduce the temperature of the outer wall of the industrial furnace, save production energy, and reduce production costs. Contact us to get the price and samples of inorganic thermal insulation panels for free.

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Aug 1, 2023
New Micro-nano Insulating Bricks

The New Micro-nano Insulating Bricks products can solve the need for thermal insulation of the wall and bottom of various large furnaces, and the working temperature can be from 600℃ to 1400℃. With a wide range of applications, good thermal insulation performance, and high strength, the product can meet the requirements of energy saving and environmental protection for various industrial furnaces.

Newly High-Temperature Micro-nano Insulation Bricks
Newly High-Temperature New Micro-nano Insulating Bricks

Main Performance Advantages and Features of New Micro-nano Insulating Bricks

  • (a) Low thermal conductivity: With low thermal conductivity, it has a good heat insulation effect and can make the furnace wall thickness thinner under the same temperature condition, thus saving more cost.
  • (b) Low heat capacity: Due to its ultra-light bulk density and low thermal conductivity, the insulating brick accumulates less heat inside, making it more energy efficient.
  • (c) Good stability: With very low iron oxide and alkali metal content, its stability is better within the specified service temperature.
  • (d) High strength: Its strength at normal and high temperatures is higher than other products with the same bulk density at the same temperature.
  • (e) Low size tolerance: The size tolerance is within 0.05mm, and the dimensions can be customized according to customer requirements.

Indicators New High-Temperature Micro-nano Insulation Bricks can achieve

Items Index
Model RS-WNM0.25 RS-WNM0.35 RS-WNM0.4 RS-WNM0.45 RS-WNM0.5
BD,g/cm3 0.25 0.35 0.4 0.45 0.5
CCS, MPa ≥0.5 ≥0.6 ≥0.8 ≥1.0 ≥2.2
TC,W/(m.K) ≤0.1 ≤0.105 ≤0.110 ≤0.115 ≤0.119
PLC,% ±0.5 ±0.5 ±0.5 ±0.5 ±0.5
600℃*12h 900℃*12h 1000℃*12h 1050℃*12h 1050℃*12h
Fe2O3,% ≤0.5 ≤0.5 ≤0.5 ≤0.5 ≤0.5

High-Temperature Micro-nano Insulating Bricks Typical Applications

High-Temperature Micro-nano Insulation Bricks can be used as a thermal insulation backing layer of refractory materials, and the application includes all kinds of industrial furnaces, hot blast furnaces, heating furnaces, smelting furnaces, flue pipes, hot air ducts, and other heating and heat-generating parts.

For Roller kilns, Tunnel kilns

insulating bricks for tunnel kilns

  1. Application positions: Furnace walls and bottom insulation layer of the ceramic roller kiln.
  2. Substitute for the following: Lightweight clay brick, high alumina insulating brick, and mullite insulating bricks.
  3. Advantages: not easy to shrink, not easy to pulverize, performance not easy to decay, and more cost-effective.

For Large Hot Air Ducts

insulating bricks for large hot air ducts

  1. Application positions: Insulation layer of a large hot air duct.
  2. Substitute for the following: Lightweight clay bricks, high alumina poly-light bricks.
  3. Advantages: lower outside wall temperature, more energy efficiency, lighter weight of thermal equipment, and more cost-effectiveness.

High-Temperature Micro-nano Insulation Bricks Wide Applications and Advantages

Our technical department announced some of its performance indicators: the bulk density can be ≤ 0.4 g/cm3 and thermal conductivity can be ≤ 0.11. It can work in the temperature range of 600-1400°C. Due to these advantages, the insulating bricks’ application advantages are as follows:

  • Insulation layer of roller kiln, tunnel kiln walls, and bottoms. It is not easy to shrink, not easy to pulverize, and its performance is not easy to decay.
  • Insulation layer for large hot air ducts. The outer wall temperature is lower and more energy-saving. Thermal equipment is lighter in weight and more cost-effective.
Micro-nano Insulation Bricks Typical Applications
Micro-nano Insulation Bricks Typical Applications

 1. Reduce the outer wall temperature of high-temperature industrial kiln

The actual measured data when the wall thickness of two different materials is 300mm, the data are compared as follows:

  1. With Rongsheng lightweight thermal insulation bricks, the temperature of the outer wall is 70°C (low);
  2. With ordinary lightweight heat-insulating bricks, the outside wall temperature is 83°C (high).
  3. The difference of outside wall temperature: 13°C↓.

Conclusion: Rongsheng lightweight thermal insulation bricks reduce the outer wall temperature by 18.57%↓.

2. Reduce the weight of the furnace body of the high-temperature industrial kiln

The actual measured data, when the temperature of the outside wall reaches 80°C, the data are compared as follows:

  1.  Using Rongsheng light-weight thermal insulation bricks, only 210mm thick (thin) is needed;
  2.  Using ordinary lightweight thermal insulation bricks, 330mm thick (thick) is needed.
  3.  The difference of wall thickness: 120mm↓.

Conclusion: Rongsheng light-weight thermal insulation bricks reduce the thickness of the furnace wall by 57.14%↓.

Rongsheng Refractory Insulating Bricks Manufacturer

Rongsheng refractory manufacturers have been working hard to provide better refractory products for customers. Finally, we achieved a breakthrough in refractory insulation materials. Its high performance-price ratio will make it widely used in the insulation layer of more and more high-temperature industrial furnaces. Effectively reduce the temperature of the outer wall of the kiln, saving production energy and costs. Let Rongsheng help you better with the high-temp insulating bricks. For more info, please leave a message or contact us directly. WhatsApp: +86 18538312977, Email: inquiry@refractoriesmaterials.com.

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Jun 30, 2021
High Alumina Insulation Bricks

Lightweight High Alumina Brick Production Process

The usually used production method of lightweight high alumina brick is the foaming method. Ground high alumina clinker, binders(such as chamotte), and foaming agent are proportionally mixed to prepare a slurry, then green lightweight high alumina bricks are produced by casting method, and sintered at 1350~1500℃ high temperature.

Lightweight High Alumina Bricks Characteristics

The bulk density of lightweight high alumina brick is between 0.4~1.35g/cm3, porosity is between 66%~73%.
Crushing strength is between 1.3~8.1Mpa, thermal conductivity is between 0.291~0.582W/(m·K)(350℃).

Lightweight high alumina brick has high refractoriness, good thermal shock resistance, and so on.

Lightweight High Alumina Bricks Physiochemical Indexes

Item QLZ-1.0 QLZ-0.9 QLZ-0.8 QLZ-0.7 QLZ-0.6 QLZ-0.4
Al2O3 % ≥48
Fe2O3 % ≤2.0
Bulk density g/cm3 ≤ 1.0 0.9 0.8 0.7 0.6 0.4
Cold crushing strength Mpa ≥ 3.9 3.4 2.9 2.5 2.0 0.8
Thermal conductivity W/(m·K)≤ 0.50 0.45 0.35 0.35 0.30 0.20

Lightweight High Alumina Bricks Applications

Lightweight high alumina bricks are usually used as high-temperature insulating lining of industrial kilns and furnaces. High-quality lightweight high alumina bricks can be directly used in working lining of industrial kilns, where contact with flame directly. But light high alumina brick is not suitable in places where molten slag corrosion exists. As lightweight high alumina bricks have good chemical stability at reduction atmosphere, so light high alumina bricks are usually used as insulating lining of kilns and furnaces which adopt H2 or CO as protection atmosphere. The max working temperature of high alumina brick is about 1350~1500℃, high purity lightweight corundum brick max. working temperature can reach 1650~1800℃.

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Jun 30, 2021
Mullite Insulation Bricks

The Classification of Mullite Insulation Bricks:

Mullite insulating brick can be divided into the heavy insulating bricks and light mullite bricks on the basis of different density, according to the different temperature, it can be divided into: 1350 mullite bricks, 1450 mullite bricks, 1550 mullite brick etc.

Performance and application of mullite insulation brick:

The refractoriness is high, can reach to more than 1790 degrees centigrade. The RUL is 1600~1700 degrees C. The compressive strength at normal temperature is 70 ~ 260MPa. The thermal shock resistance is good. There are two kinds of mullite bricks: sinterted mullite and fused mullite brick.

The Characteristics of Mullite Insulation Brick:

The main material of sintered mullite brick is high alumina bauxite as the main raw material, adding a small amount of clay or raw bauxite as binder, it is made by molding and sintering. Fused mullite brick with high bauxite, commercial alumina and refractory clay as raw material, adding charcoal or coke fines as a reducing agent, after molding, can adopt the reduction electrofusion method to manufacture. The crystallization of the electric cast mullite is larger than that of the sintered mullite, and the thermal shock resistance is better than that of the sintered product. Their high temperature performance mainly depends on the content of alumina oxide and the uniformity of the distribution of mullite and glass.

Application of Mullite Insualtion Bricks:

Mainly used for hot blast stove of blast furnace and furnace bottom and furnace, glass furnace regenerator, sintering kiln, petroleum cracking dead lining system.

The Manufacture of Mullite Insulation Bricks:

Zhengzhou Rongsheng Kiln Refractory Material Co., Ltd is specialized in producing and selling refractory material for many years, we have technical team with colorful experience and excellent production team, we provide technical supporting and kiln construction service, if you have demand for mullite insulation bricks, welcome to contact with we RS company.

Mullite Insulation Brick Specification:

Mullite Insulation Brick
Item/Index JM23 JM26 JM28 JM30 RS32
Al2O3 % 37 54 64 72 77
Fe2O3 % 1.0 0.9 0.8 0.7 0.5
 

Thermal Conductivity (w/m*k)

 400℃ 0.14 0.27 0.32 0.41 0.49
600℃ 0.16 0.29 0.34 0.43 0.5
800℃ 0.18 0.31 0.36 0.44 0.51
1000℃ 0.20 0.33 0.38 0.45 0.53
Classification Temperature (℃) 1260 1430 1540 1650 1760
Thermal Expansion 1000℃ (%) 0.5 0.7 0.8 0.9 1.1
Bulk Density (g/cm3) 0.55-0.62 0.78-0.8 0.88 1.03 1.25
Cold Crushing Strength (Mpa) 1.2 1.6 2.1 2.5 3.5
Modulus of Rupture (Mpa) 0.9 1.4 1.6 2.1 2.1
Reheating Linear Change (%)

CT-30℃*8H

 1230℃

-0.5

 1400℃

-0.5

 1510℃

-0.5

 1620℃

-0.9

 1730℃

-0.9
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Jun 30, 2021
Clay Insulation Bricks

Clay Insulation Brick Properties

High porosity, usually 40%~85%.
The low volume density, the low volume density is lower than 1.5g/cm3
Low thermal conductivity, generally less than 1.0W (m.K)
As the insulation material of industrial kiln, it can reduce heat loss, save energy, and reduce the quality of thermal equipment.

Clay Insulation Brick Physical & Chemical Index

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

Clay Insulation Brick Application

Furnaces of metallurgy industry, heat treatment furnace
Furnaces of chemical industry and construction industry.
Furnace of incineration of garbage, recirculating fluidized bed furnace

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Jun 30, 2021
Silica Insulation Bricks

Feature of Light Weight Silica Insulation Bricks:

1.Low bulk density,
2.Low thermal conductivity,
3.High apparent porosity,
4.Good thermal shock resistance,
5.Great high-temperature mechanical strength,
6.High-temperature stable volume change,
7.Strong acid slag erosion resistance.

Application of Light Weight Silica Insulation Brick

Lightweight silica brick is mainly used to preserve heat in the glass industry, iron&steel industry, and ceramic furnaces. The main applications are the low-temperature parts such as blast furnaces and hot blast furnaces, waste incinerators, and glass melting furnaces.

Light Weight Silica Insulation Brick Description

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