Refractory Brick

Why Choose Us?

Professional team
After more than 20 years of development and experience accumulation. Our union has strong research and development capability, R&D centre is full responsible for test, research and product innovation, with 31 senior engineers, 96 engineers and 179 assistant engineers.

Complete range of products
We produce and operate refractory raw materials, refractory products, ceramic products, graphite electrodes, refractory binders, wear-resistant, acid-resistant and heat-resistant products, special building materials, silicon carbide products, refractory equipment, molds, copper molds, copper tubes, copper plates, Stainless steel products, slag pot, etc., including import and export. Imported calcium stabilized zirconia, yttria stabilized zirconia, quartz sand, graphite, andalusite, zirconium corundum etc.

High quality service
Zibo runjin has been persisting in a service philosophy of "Customers's Satisfaction is our eternal pursuit", taken "building a Worldwide first -class refractory manufactures" as the mission, and held "co-creation, co-operation, co-prograss, win-win"as its core values.Relying on management and technology accumulation during past many years, based on its over many years reputation as guarantee. Zibo runjin is doing its best to offer refractory system solutions with values added to achieve co-progress with our customers.

Advanced equipment

There are five high-quality clay high alumina brick production lines, two production lines for andalusite brick and mullite brick, five silica brick production lines, three production lines for continuous casting, One carbon and silicon carbide composite refractory production line ,One production line for tundish stabilizer, impact plate and slag retaining wall, a production line for high-grade light products, Pure oxide refractory production line, Unshaped refractory production line, Non-fired brick refractory product production line.

What Are Refractory Bricks

Bricks are the most significant construction materials. Mankind has been using them for thousands of years. But when it comes to withstanding high temperatures, normal bricks cannot serve the purpose. As conventional bricks always tend to crack at high temperatures, they are replaced by refractory bricks. Refractory bricks are special types of bricks well-known for their unmatched ability to combat high temperatures. Some of the other names of these bricks are ceramic bricks or fire bricks.

Checker Brick For Coke Oven

Fire clay bricks for coke ovens are made of clay and sintered at high temperature to form a porous

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Acid Resistant Bricks

1. It has excellent chemical stability, strong acid resistance, and also has a certain degree of

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High Alumina Bricks

High alumina brick is a neutral refractory material with an alumina content of more than 48%. It is

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Pouring Bricks

Pouring bricks are hollow refractory bricks built in the grooves of the bottom plate for ingots to

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Coke Oven Dry Quenching Bricks

These products possess excellent property of spalling resistance and abrasion resistance. The

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Electric Furnace Top Brick

Electric furnace roof high alumina bricks refer to refractory products for electric furnace roofs

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$Refractory for Cement Kiln$

Refractory for Cement Kiln

High-alumina bricks suitable for cement kilns mainly include phosphate-bonded high-alumina bricks,

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Corundum Bricks

Corundum bricks refer to refractory products with alumina content greater than 90% and corundum as

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Refractory Brick vs Fire Brick: Key Differences

While both refractory bricks and fire bricks are designed for high-temperature applications, there are some critical differences that make them suitable for different purposes:

Composition

Refractory bricks, including SiC refractory bricks, are typically made from materials like silicon carbide, alumina, zirconia or are containing a higher amount of mullite. Fire bricks, on the other hand, are primarily composed of clay minerals and alumina or mullite in lower quantities.

Thermal properties

Refractory bricks generally have a higher thermal conductivity as of their higher density.

Application-specific performance

Refractory bricks are designed for specific high-temperature applications and environments, offering better performance in terms of wear, corrosion because of direct contact with the corrosive media, and thermal resistance. Fire bricks, while suitable for general high-temperature applications, may not perform as well in more demanding environments and have a limited maximum temperature of use.

Cost

Due to their high quality raw materials and properties, cost of refractory bricks is typically premium compared to fire bricks.

Benefits of Using Refractory Bricks

The use of refractory bricks has a lot of benefits. They are more expensive than traditional bricks due to their exceptional high-end insulating power. For your further investments, they do offer some unique gifts.

Outstanding insulation
Fire bricks are mainly used for their excellent insulating properties. They can prevent heat from passing through them. They also maintain the building's comfort in summer and winter.

Superior strength bricks
Refractory bricks are more durable than regular bricks. They are hence more resilient than traditional bricks. They are also relatively light.

Any size and shape
We offer customers personalized bricks in specified shapes and dimensions.

$Refractory for Cement Kiln$

The Importance of Refractory Brick

The secret to wood ovens comes in the form of refractory bricks. These bricks are made from a special type of ceramic which can withstand high temperatures without damage. A typical brick could start to break apart at 1200 degrees Fahrenheit (~ 649 degrees Celsius), but a refractory brick will handle heat up to 1800 degrees Fahrenheit (~982 degrees Celsius). This removes any of the stress that may come from heating up the wood oven, and you'll be able to safely turn the temperature up knowing that the bricks can handle the heat.
Refractory bricks are also energy efficient. This is because refractory bricks have low thermal conductivity, meaning that they start absorbing the heat quickly, so there's no waste when preparing your meal. The bricks coupled with convection design, quality stainless steel, and outstanding ventilation allow to retain heat for your perfect cook.
Not only are refractory bricks tough against the heat, but they can also handle the wear-and-tear of cooking. You don't have to worry about delicately touching your tools to the surface of an oven with refractory bricks. They are sturdy and resistance to abrasion – not only durable but long lasting.
Refractory bricks often line the walls of industrial furnaces and incinerators, so you know they can take the heat and you can focus on cooking the perfect pizza or meal.

Properties of Refractory Bricks at a Glance

● The water absorption of a refractory brick is 5 to 10%.
● They have a high fusion point.
● Refractory bricks resist high temperatures.
● They have outstanding compressive strength.
● The weight of fire bricks is 150 lbs per cubic ft.
● The size of a refractory brick is 9×4.5×2.5 inches or 9×2.7×2.25 inches.
● Refractory bricks also have unmatched chemical resistance
● They also do not react with the gases of the furnace.

Why Use Refractory Bricks in Building Kilns

Refractory brick is frequently used to construct kilns, furnaces and other high-temperature enclosures. That's because refractory brick reduces heat loss and the chance of an unintended fire.
The composition of the refractory brick will determine what temperatures it can withstand. Some types of refractory brick can withstand temperatures of over 2,100 degrees Celsius (3,600 degrees Fahrenheit). However, bricks heated above these temperatures will typically begin to melt.
Refractory brick is formed by a variety of brick-making processes—for example, soft-mud casting, hot pressing and dry pressing. Depending on the material of the refractory brick, some processes will work better than others. Refractory brick is typically formed into rectangular shapes measuring nine inches long by four inches wide (22.8 centimetres by 10.1 centimetres) and a between one and three inches thick (2.5 centimetres to 7.6 centimetres).
Corrosion reactions proceed in the direction of localized chemical equilibrium. Essentially, corrosion reactions are what happens when the system trying to achieve compatibility and attempts to do this by progressing toward equilibrium. Refractories, generally, are rarely at chemical equilibrium because they are typically made from a mixture of different minerals. Although at an immediate corrosion interface that may exist between the refractory and the slag, the localized volume elements tends to be at or close to chemical equilibrium. The reactive component in the phenomenon that occurs during refractory corrosion is called the "slag".
The matrix is the area of sintered fines that holds bonded bricks and monolithic refractories together. Corrosion usually affects the weakest component of the refractory at a higher rate than denser or higher purity particles that may be in the area and acts faster in such areas. In extreme cases of a matrix attack, there is rapid erosion of refractory aggregate that at times occurs.

Grades Are Important: Refractory Brick

The main ingredient in fire bricks is fireclay, which contains mostly alumina and silica, elements capable of withstanding high temperatures. Hard bricks are available in several grades, depending on their composition and properties, which determine the most efficient use of them in construction. High alumina compositions start at 50% alumina and increase in alumina content to 98% for the highest purity and most expensive. It's extremely rare that a potter would require an alumina content exceeding 70%.

Low-duty: Typically rated to 1750°F maximum service temperature. Primarily used for fireplace chimneys and contains 24–26% alumina.

Medium duty: Temperature rating to 2700°F maximum service temperature. Uses include backup linings, lower-temperature ceramic kilns and chimneys, and contains 34–38% alumina.

High Duty (first-quality firebrick): Temperature rating to 2850°F maximum in purely heat service. Certain atmospheres can reduce this temperature rating by several hundred degrees and contains 36–40% alumina. Uses include boilers, ceramic kilns, chimneys and back-up linings.

Super Duty: Temperature rating to 2900°F in pure heat service. Certain atmospheres can reduce this temperature rating by several hundred degrees. Same uses as high duty where higher temperatures are involved. Contains 40–44% alumina.

High-Fired Super Duty: Temperature rating between 3000°F–3150°F. A higher burned version of super duty firebrick designed to lower the porosity, increase physical strength and improve resistance to alkali attack and carbon monoxide disintegration. Contains 40–44% alumina.

Application Scenarios of Refractory Bricks

01/

Iron and Steel Industry
The iron and steel industry is the primary consumer of refractory bricks. Blast furnaces, converters, and ladles require refractory bricks to withstand the high-temperature environment. Refractory bricks are also used in coke ovens, sintering machines, and hot blast stoves.

02/

Glass Industry
The glass industry uses refractory bricks in its melting furnaces, where temperatures can reach up to 1600°C. Refractory bricks help maintain the required temperature and protect the underlying structure from heat damage.

03/

Cement Industry
In the cement industry, refractory bricks are used in rotary kilns, preheaters, and coolers. These fire-resistant bricks provide insulation and protect the kiln from the high-temperature environment.

04/

Petrochemical Industry
The petrochemical industry uses refractory bricks in reactors, reformers, and crackers. These bricks provide thermal insulation and protect the equipment from high-temperature and corrosive environments.

Our Factory

After more than 20 years of development and experience accumulation, The main production plants of Runjin technology and trade complex are as follows:
Qingdao Huaye New Material co., ltd.
Shandong Daqiao New Material co., Ltd.
Yangquan Wanglong Refarctories co.Ltd.
Anshan Aoan High Temperature Material Co., Ltd.
It's total assets value has reached 1.05 Billion RMB and currently employs 4078 personnel, including 544 refractory technical personnel and 3145 well trained workers
The annual production capacity has exceeded 30 thousands tons with comprehensive seven series refractories as following: Fire clay bricks, Alumina bricks, Con-casting refractory, Binder for refractory, Fine Ceramics, Graphite electrode, acid resistant brick, Silicon carbon crucible, Silicon carbon plate, Special building material, Cellulose ether, Super chamotte raw material and Synthesized mullite material, Magnesia raw material, etc. Products are applied to worldwide industries of metallurgy, building material, non-ferrous metal smelting, petrochemical, nonferrous, electronics, cement industry and so on. Approx. 68% products are supplied to metallurgy industry. China leading Steel group.-e.g.Baowu steel, Anshan steel, WISCO, SHOUGANG, TISCO, PANGANG, HBIS, SHAGANG, which belongs to same parent company are our main customers in domestic market.in oversea market, Zibo runjin is a refractory supplied of Arcelor - mittal, POSCO Guangyang steel, HYUNDAI steel, Nippon steel, JFE steel, US United Steel, Erdemir group., Danieli, SVAI and working together with famous refractory manufactures -e.g.Chosun refractories, ANH refractories and Krosaki refractories etc. Zibo runjin also has a good cooperation with world famous engineering companies .
our union has strong research and development capability, R&D centre is full responsible for test, research and product innovation, with 31 senior engineers, 96 engineers and 179 assistant engineers. Zibo runjin enables itself to be one of then leading refractory manufactures for supplying andalusite bricks for CDQ furnace, silicon bricks, AG con-casting refractory and so.
Zibo runjin has been persisting in a service philosophy of "Customers's Satisfaction is our eternal pursuit", taken "building a Worldwide first -class refractory manufactures" as the mission, and held "co-creation, co-operation, co-prograss, win-win"as its core values.Relying on management and technology accumulation during past many years, based on its over many years reputation as guarantee. Zibo runjin is doing its best to offer refractory system solutions with values added to achieve co-progress with our customers.

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FAQ

Q: What is the difference between refractory brick and regular brick?

A: In addition to holding heat, firebricks also have exceptional heat resistance and can handle more extreme thermal shocks. Common bricks are more porous than firebrick. This means that, while they may be considered relatively heavy, they are less dense (and therefore not as heavy) and less smooth than firebrick.

Q: Can refractory brick get wet?

A: If the material is stored improperly, such as in a place where the brick or refractory bags can become damp or wet, the moisture may get into the material and cause a partial setting of the refractory or make it completely unusable. Refractory material that is exposed to dampness will get hard and is easily recognized.

Q: What are the examples of refractory bricks?

A: Bauxite, Magnetite, and Dolomite bricks are the three types of basic refractory bricks. Magnesite bricks are ideal for lining furnaces because they contain 3 to 5% iron oxide and 85% magnesium oxide.

Q: What are refractory bricks generally used for?

A: A fire brick, firebrick, fireclay brick, or refractory brick is a block of ceramic material used in lining furnaces, kilns, fireboxes, and fireplaces. A refractory brick is built primarily to withstand high temperature, but will also usually have a low thermal conductivity for greater energy efficiency.

Q: How do you store refractory bricks?

A: To select or to prepare the refractory storage area, below are recommendations. Good covered store to prevent water from rain and heat from the sun. Good air ventilation is required to keep dry atmosphere and stable temperature. Good floor conditions, strong and hard, dry, no cracks, and horizontally leveled.

Q: What is the shelf life of refractory bricks?

A: Depending on the composition of the material, most refractory materials have a shelf life ranging from six to twelve months. The shelf life is due to most monolithic materials containing cement.

Q: How thick is a refractory brick?

A: In general, refractory lining thickness is in between 80 mm and 300 mm. However, the thickness should be determined for each project differently.

Q: Do refractory bricks hold heat?

A: Dense refractory bricks have a high thermal mass which is sometimes a useful property in that they will retain heat eg in a pizza oven after the fire has been taken out.

Q: What is the quality of refractory bricks?

A: Refractory bricks are generally yellowish-white in color. They have excellent thermal resistance and great compressive strength. Their chemical composition drastically differs from the chemical composition of normal bricks. Refractory bricks contain around 25 to 30% alumina and 60 to 70% of silica.

Q: How to dispose of refractory bricks?

A: If the refractory brick/mold and ash analysis determine the materials are not regulated for chromium or asbestos, the waste can be disposed of in the trash.

Q: How long do refractory bricks last?

A: The service life of refractory bricks is related to many factors. If it is used improperly, it may be damaged in one or two months. If used properly, its life may reach five years and ten years.

Q: What is the reheat change of refractory brick?

A: Refractory brick and shapes of different compositions exhibit unique permanent linear change after heating or reheating. Linear change is an important indicator of the quality of refractory. Linear change is also known as linear change on reheating or residual linear change.

Q: Are refractory bricks the same as fire bricks?

A: Composition: Refractory bricks, including SiC refractory bricks, are typically made from materials like silicon carbide, alumina, zirconia or are containing a higher amount of mullite. Fire bricks, on the other hand, are primarily composed of clay minerals and alumina or mullite in lower quantities.

Q: How do you cut refractory brick?

A: The good news is these bricks are very easy to cut. Genuinely if you had the patience you could cut through them with a spoon. They take tools a treat and you can saw, carve and shape them with handsaws, files, chisels, rasps, sandpaper, etc.

Q: What is the maximum temperature for refractory brick?

A: Standard bricks withstand operating temperatures greater than 2000°C (3630°F) with capacity to spare. Quartz melting and synthetic crystal growing are typical applications.

Q: What is the main property of refractory bricks?

A: Some of the primary characteristics of refractory bricks are as under: They are generally yellowish-white in colour. They offer outstanding thermal resistance along with a great compressive strength. Their chemical composition is quite different from the chemical composition of normal bricks.

Q: What are the raw materials for refractory bricks?

A: Raw Materials: Fire clays of both plastic and non-plastic varieties, refractory grog (broken fire bricks) and other high alumina minerals like kyanite, sillimanite and bauxite are the raw materials for making fire clay bricks and blocks.

Q: What is the common firebrick size?

A: The standard refractory brick size is 9×4½×2½ inches, also known as one brick equivalent (beq). This size is the most common used in pottery kiln construction. However, an equally popular standard size used in industrial furnace construction is the 9×4½×3-inch series.

Q: What is spalling in refractory brick?

A: This occurs when refractory linings expand and contract at different rates due to thermal conditions. This often leads to cracking and spalling which can cause failure if not repaired.

Q: Do refractory bricks reflect heat?

A: This IFB is an excellent insulator and reflects heat well. Insulating Refractory Fire Bricks are light in weight and can be easily cut by handheld hack saw or any other hand tool like chisel or drill.

As one of the leading refractory brick suppliers in China, we warmly welcome you to buy or wholesale high-grade refractory brick in stock here from our factory. All our products are with high quality and competitive price.

pure corundum brick, Sillimanite brick, Corundum shaped parts