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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 Refractory Bricks

Product features：

1.High refractoriness
2.High-temperature strength
3.High thermal stability
4.Neutral refractory
5.Good resistance to acid and basic slag corrosion
6.High refractoriness under load

high alumina refractory bricks4

Physio-chemical Index of High Alumina Bricks :

Items First grade

high alumina brick

 Second grade

high alumina brick

 Third grade

high alumina brick

 Special grade

high alumina brick
LZ-75 LZ-65 LZ-55 LZ-80
Al2O3 % ≥ 75 65 55 82
Fe2O3 % ≤ 2.5 2.5 2.6 2.0
Bulk Density g/cm3 2.5 2.4 2.3 2.6
Cold Crushing Strength MPa ≥ 70 60 50 80
0.2MPa Refractoriness Under Load  ℃ 1510 1460 1420 1550
Refractoriness ℃ ≥ 1790 1770 1770 1790
Apparent Porosity % ≤ 22 23 24 21
Reheating Linear Change 1450℃×2h  % -0.3 -0.4 -0.4 -0.2

Applications of High Alumina Bricks:

High alumina bricks are popularly used for the masonry of industrial kilns’ inner linings, such as blast furnaces, hot blast furnaces, electric furnace top, reverberator, rotary cement kiln, and so on. Besides, high alumina bricks are also widely used as regenerative checker bricks, stopper of the continuous casting system, nozzle bricks, etc.

high alumina refractory bricks5

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Jun 30, 2021
Alumina Carbon Bricks

Catalog

★ What are the Common Alumina Carbon Brick

Burned Micropores Alumina-Carbon Brick
Burned Micropores Alumina-Carbon Brick features
Burned Microporous Alumina-Carbon Brick Technique Data
Aluminium Carbon-based Refractories for Continuous Casting Tundish

★ Aluminum Carbon Bricks Application
★ Aluminum Carbon Bricks Manufacture Process
★ What are the Raw Materials and Binders of Aluminum Carbon Bricks

★ What are the Common Alumina Carbon Brick

1.Burned Micro-pores Alumina-Carbon Brick is mainly used for working lining of bosh above the air pip and belly. The average pore diameter of micro-pore alumina carbon brick is less than 1µm, and the volume percentage of the pores less than 1µm is no less than 70%.

Burned Microporous Alumina-Carbon Brick features

(1) Low porosity & low air permeability.
(2) high crushing strength & high thermal conductivity.
(3) Anti-slag, anti-alkali, anti-erosion ability.
(4) Good thermal shock stability.

Burned Microporous Alumina-Carbon Brick Technique Data

Item Index
RSAC-1 RSAC-2 RSAC-3
Al 2 O 3 ,% ≥ 65 60 55
C,% ≥ 11 11 9
Fe 2 O 3 ,% ≤ 1.5 1.5 1.5
Bulk density, g/cm 3 ≥ 2.85 2.65 2.55
Apparent porosity, % ≤ 16 17 18
Cold crushing strength, Mpa ≥ 70 60 50
Refractoriness under load(0.2Mpa, Ti) °C ≥ 1650 1650 1600
Thermal shock stability, times ≥ 100 100 100
Iron liquid corrosion index,% ≤ 2 3 4
Air permeability, mDa ≤ 0.5 2 2
Average pore size, mm≤ 0.5 1 1
Less than 1mm Pores volume percentage % ≥ 80 70 70
Anti-alkali performance,% ≤ 10 10 15
Thermal conductivity, w/m·k ≥ 13 13 13

2. Aluminium Carbon Refractories used for Continuous Casting Tundish, mainly include upper nozzle, lower nozzle, and stoppers, which are also called special-shaped aluminum carbon bricks. The raw materials of continuous casting nozzles and stoppers are corundum and graphite. A small number of additives are added to raw materials during the production process. Phenolic resin is used as a binder of alumina carbon nozzles and stoppers. After mixing, molding and drying, green bodies are burned in a non-oxidizing firing kiln. The firing temperature is 1350 °C, after machining, anti-oxidation coating can be spayed to the surface to prolong their service life.

Aluminum Carbon Refractories for Continuous Casting Tundish

(1) Good integrity and safe use.
(2) To better purify the molten steel.
(3) High strength, good resistance to molten steel, and slag erosion.
(4) Wear resistance and long service life.

★ Aluminum Carbon Bricks Application

Aluminum carbon bricks can be used in blast furnaces, continuous casting tundishes (long nozzles, submerged nozzles, stoppers, upper and lower nozzle bricks, slide plate bricks), ladle, hot metal cans, torpedoes, and other thermal equipment.

★ Aluminum Carbon Bricks Manufacture Process

Add graphite raw materials to alumina raw materials (corundum, mullite, bauxite), add small amounts of other raw materials such as silicon powder and SiC powder, then mixed with resin or asphalt binder, molded by press machine and finally fired at about 1300 ° C in a reducing atmosphere kiln.

★ What are the Raw Materials and Binders for Making Aluminum Carbon Bricks

For the unfired aluminum carbon bricks, the commonly used raw materials are corundum, mullite, first-grade high-alumina bauxite clinker, graphite, SiC, and Si powder. Commonly used binding agents are resin, tar, asphalt, and the like. Different raw materials should be used for the production of aluminum carbon bricks based on applications.

The above is a brief introduction to aluminum carbon bricks. If you need to purchase aluminum carbon bricks, RS Refractory can supply you with the best quality products at a competitive price. We can also customize refractory products according to your requirements and provide you best refractory materials and engineering solutions.

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Jun 30, 2021
Alumina Silica Fire Brick for Sale

High-Purity Alumina Silica Fire Bricks Properties

High-Temperature Bulk Density
Excellent Capacity of Refractoriness under load
High Thermal Conductivity
Low Porosity
Excellent Abrasion Resistant Ability
Excellent Thermal Shock Performance

Alumina Silica Fire Brick Physical & Chemical Index

Item RSAS60 RSAS70 RSAS75 RSAS80
AL2O3(%) ≥60 ≥70 ≥75 ≥80
SIO2(%) 32 22 20 ≥18
Fe2O3(%) ≤1.7 ≤1.8 ≤1.8 ≤1.8
Refractoriness °C 1790 >1800 >1825 ≥1850
Bulk density,g/cm3 2.4 2.45-2.5 2.55-2.6 2.65-2.7
Softening temperature under load ≥1470 ≥1520 ≥1530 ≥1550
Apparent porosity,% 22 <22 <21 20
Cold Crushing strength Mpa ≥45 ≥50 ≥54 ≥60

Three Major Categories of Alumina Silica Bricks

Semi Siliceous Products (Al2O3≤30%)
Fire Clay Products (30%≤Al2O3≤48%)
High Alumina Products (Al2O3≥48%)

Different raw materials and volumes of components determine the kind of products.

Alumina Silica Fire Brick Applications

1. Steel furnaces
2. Ironmaking furnaces
3. Glass kiln
4. Ceramic tunnel kiln
5. Cement kiln

Our alumina silica fire brick products have been shipped all around the world, such as Thailand, Indonesia, Pakistan, Saudi Arabia, South Africa, Turkey, Iran, Iraq, etc. welcome to buy alumina silica firebrick at Rongsheng and enjoy our high-quality service. Please leave your message and we will be in contact as soon as possible.

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Jun 30, 2021
High Alumina Checker Firebrick

Choose the type that you need, or provide the size you need.

High Alumina Checker Firebrick Features & Advantages

1. High refractoriness.
2. Good spalling resistance and wear resistance.
3. Good corrosion resistance.
4. Good thermal shock resistance.
5. High mechanical strength.
6. High-temperature creep rate is low.

High Alumina Checker Firebrick for Furnace Technique Data

High Alumina Checker Firebrick Physical and Chemical Index:
Item Properties
RS-80 RS-75 RS-65 RS-55 RS-48
Al2O3 (%) 80 ≥75 ≥65 ≥55 ≥48
Refractoriness  (°C ) ≥1790 ≥1790 ≥1790 ≥1770 ≥1750
Bulk density  (g/cm3) 2.65 2.5 2.45 2.4 2.3
Softening temperature under load  (°C ) 1530 ≥1520 ≥1500 ≥1470 ≥1420
ReheatingLinear Change Rate  (%) 1500°CX2H 0.1 0.1 0.1 0.1 0.1
1450°CX2H -0.4 -0.4 -0.4 -0.4 -0.4
Apparent porosity (%) 22 ≤23 ≤23 ≤22 ≤22
Cold crushing strength (Mpa) 55 ≥50 ≥45 ≥40 ≥35
Application steel furnace, glass furnace, sodium silicate furnace, ceramic shuttle kiln, cement rotary kiln, blast furnace, electric furnace, blast furnace, and reverberatory furnace.

High Alumina Checker Firebrick Applications

1. Steel furnaces
2. Ironmaking furnaces
3. Glass kiln
4. Ceramic tunnel kiln
5. Cement kiln

About Rongsheng Kiln Refractory Company

Zhengzhou Rongsheng Kiln Refractory Co., Ltd, located in the beautiful Xinmi City, Henan Province with rich refractory materials. Established in the early 90s of twenty century, with continuous innovation and development, now we are a comprehensive enterprise producing refractory in metallurgy, electric power, building materials, chemical industry, glass, non-ferrous metals, etc. There is more than 180 staff, including 20 professional technicians. We have 3 automatic production lines for shaped, unshaped, and insulating refractory materials.

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