Carbon Brick

Company Profile

Locates in Dashiqiao city of Liaoning Province, replying on the "China Magnesia Capital" - Dashiqiao city's rich magnesite mineral resource, and the local industrial cluster of refractories, we have invested two production lines of 120-meter ultra-high temperature tunnel kiln, a full-automatic crushing and grinding workshop for raw materials, with more than 100 employees and an annual output of 100,000 tons of various refractory products. Its magnesia product line covers all grades of Mg, Mg-Cr, Mg-C, Mg-Zr, Mg-Fe spinel, Mg-Al spinel, forsterite and other sintering brick products, expecially the directly bonded and semi-directly bonded Mg-Cr bricks have been successfully applied on the AOD (Argon Oxygen Decarburization), VOD (Vacuum Oxygen Decarburization), and RH (Ruhrstahl Heraeus) refining furnaces of steel mills.

It has over 20 years' experience in technological research and production management of alumina refractory materials, a fullautomatic batching and filling production line and a manufacturing workshop of castables, covering all the alumina refractories including: Shaped products of high alumina series, mulite series, silicon series, phosphate series and light insulation series etc., and unshaped products of castable, self-flow, plastic materials and precast blocks, etc., as well as a variety of raw refractories and chemical products.

Why choose us?

Our Product
We offer various magnesia and alumina refractories, including both shaped and unshaped products, as well as raw materials and related chemical products.

Product Applications
These are widely used in steel-making, metallurgy, construction, nonferrous industries, power plants, machinery, petroleum, chemicals, and other sectors.

Sales Market
Our products have been exported to the USA, Australia, Vietnam, South Korea, Russia, and many other countries in Africa, Europe, and America.

Our company
We are a refractory material supplier integrating R&D, production, processing, construction, warehousing, and commerce. We have invested in two production lines with 120-meter ultra-high temperature tunnel kilns and a fully automated crushing and grinding workshop for raw materials, employing more than 100 people with an annual output of 100,000 tons of various refractory products.

$Carbon Refractory Bricks$

Carbon Refractory Bricks
Carbon bricks are type of carbonaceous refractory material made from coke, anthracite, or graphite mixed with tar. These materials are shaped and fired in a reducing flame at 1450°C.
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$Silicon Carbide Refractory Brick$

Silicon Carbide Refractory Brick
Silicon carbide bricks are refractory materials made primarily from SiC. With a Mohs hardness of 9, they are stable against acidic slags.

● Strong abrasion resistance....
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Silicon Nitride Bonded Silicon Carbide Brick
The process of silicon nitride bonded silicon carbide bricks, involves utilizing reaction sintering principles to sinter SiC bodies containing silicon powder through nitriding reactions.
...
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What is Carbon Brick

Carbon bricks are specialized building materials known for their high resistance to extreme temperatures and corrosive environments. These bricks are primarily composed of carbonaceous materials, making them an ideal choice for industries that require materials with exceptional heat and chemical resistance.

Benefits of Carbon Brick

01/

High refractoriness
These bricks can withstand temperatures exceeding 2000°C, making them ideal for furnaces, kilns, and other high-temperature processes.

02/

Excellent thermal shock resistance
Carbon refractory bricks exhibit exceptional resistance to sudden temperature changes, preventing cracking and ensuring long-lasting performance.

03/

Chemical resistance
They are highly resistant to corrosion caused by molten slag, molten iron, acid-base solutions, and organic chemicals.

04/

High thermal conductivity
This property allows for efficient heat transfer, crucial for maintaining temperature uniformity and process control.

05/

Strong mechanical strength
Carbon refractory bricks possess high compressive and tensile strength, enabling them to withstand significant loads and pressure.

06/

Good wear resistance
They resist abrasion and wear effectively, extending their lifespan and reducing maintenance requirements.

Types of Carbon Brick

$Carbon Refractory Bricks$

Non-impervious carbon bricks
Non-impervious carbon bricks are designed to be resistant to heat and chemical corrosion but are not entirely impermeable to liquids or gases. They find applications in industries where moderate resistance to penetration is sufficient.

Impervious carbon bricks
Impervious carbon bricks, on the other hand, offer complete resistance to the penetration of liquids and gases. They are used in applications where a high level of impermeability is required, such as in the lining of furnaces and chimneys.

Key Applications of Carbon Bricks in High-Temperature Environments

Blast furnaces in the steel industry
One of the primary applications of carbon bricks is in blast furnaces used in the steel industry. These furnaces operate at extremely high temperatures, reaching up to 2,000°C (3,632°F) during the smelting of iron ore into molten iron. The interior of a blast furnace is lined with refractory materials, including carbon bricks, to protect the structure from the intense heat and to facilitate efficient heat transfer.Carbon bricks are particularly valued in this application for their high thermal conductivity, which ensures even heat distribution throughout the furnace. This prevents localized overheating and thermal stress, both of which can lead to premature wear or failure of the furnace lining. By maintaining a stable thermal environment, carbon bricks contribute to the overall efficiency and longevity of the blast furnace.

Aluminum reduction
CellsIn the aluminum industry, carbon bricks play a crucial role in the electrochemical process used to produce aluminum from alumina. This process takes place in reduction cells, which are lined with carbon bricks to withstand the high temperatures and corrosive nature of molten aluminum and cryolite.The high thermal conductivity of carbon bricks ensures that the reduction cells maintain a consistent temperature, which is essential for the efficiency of the electrolysis process. Additionally, the bricks’ resistance to chemical corrosion protects the cell structure from the aggressive environment, reducing the need for frequent maintenance and extending the life of the equipment.

Coke ovens
Coke ovens are used in the production of coke, a fuel derived from coal that is essential in the steelmaking process. The ovens operate at temperatures as high as 1,100°C (2,012°F), and the walls of these ovens are lined with carbon bricks to withstand the extreme heat and the corrosive gases produced during the coking process.Carbon bricks are ideal for this application due to their ability to withstand repeated heating and cooling cycles without cracking or degrading. This durability is crucial for maintaining the efficiency of the coke production process, as it minimizes downtime and reduces the frequency of costly repairs or replacements.

Non-ferrous metal
SmeltingIn addition to their use in the steel and aluminum industries, carbon bricks are also employed in the smelting of non-ferrous metals such as copper, nickel, and zinc. These processes often involve high-temperature furnaces where carbon bricks are used to line the walls and floors, providing protection against the intense heat and corrosive materials involved in smelting.The thermal conductivity and chemical resistance of carbon bricks ensure that the smelting process operates efficiently, with minimal heat loss and reduced risk of damage to the furnace lining. This not only enhances the efficiency of metal production but also contributes to the overall safety of the operation.

Carbon Bricks Manufacturing Process

The production process of carbon brick is similar to that of other firebrick, but it is necessary to prevent the oxidation of carbon at high temperature, so the roasting of raw materials and the firing of products. The series of refractory bricks need to be carried out in a reducing atmosphere. Anthracite needs to be roasted before use to remove volatile matter, sulfur, and moisture, and to improve the volume stability, mechanical strength, and antioxidant properties of anthracite. When carbon bricks make, coke wants to want to pass first dry, lest because contain moisture to be exorbitant and cause molding difficulty and make the product is in firing process craze. Asphalt shall be dissolved and dehydrated to the extent that the moisture content is less than 0.2%, and the dehydration temperature shall be 120~160℃.

Carbon bricks batching is mainly based on roasted granular anthracite as aggregate, its particle size is mainly determined by the size of the products. In order to prevent oxidation, the brick is usually fired with coke powder or coal powder as a protective filler. The firing temperature is 1300 ~ 1450℃, the heat preservation time is about 20 hours, cooling to 40 ~ 60℃ when out of the kiln. Carbon bricks are liable to catch fire if they are put out of kilns at high temperatures.

Carbon bricks make are widely used in metallurgy industry. Among them, the carbon brick of blast furnace is the largest, and the hearth and hearth of many blast furnaces are built with carbon brick. Carbon bricks can also be used in aluminum electrolyzer. In addition, it is also widely used in the pickling tank and electroplating tank of the electroplating industry, the dissolving tank of the papermaking industry, the reaction tank and storage tank of the chemical industry, and the autoclave of the petrochemical industry.

Our Factory

Locates in Fushun city of Liaoning Province, it has over 20 years' experience in technological research and production management of alumina refractory materials, a fullautomatic batching and filling production line and a manufacturing workshop of castables, covering all the alumina refractories including: Shaped products of high alumina series, mulite series, silicon series, phosphate series and light insulation series etc., and unshaped products of castable, self-flow, plastic materials and precast blocks, etc., as well as a variety of raw refractories and chemical products.

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FAQ

Q: What are carbon bricks?

A: Carbon bricks, primarily composed of high-purity graphite and other carbon materials, are known for their excellent thermal conductivity and resistance to high temperatures. They are often used in scenarios where conventional materials would fail under extreme conditions.

Q: How do carbon bricks compare to other refractory materials?

A: Compared to other refractory materials, carbon bricks stand out for their superior thermal conductivity and high-temperature stability, although they might come at a higher price point and require specialized handling.

Q: How are carbon bricks made?

A: The manufacturing process involves mixing carbon-rich materials with a binder, shaping the mixture into brick forms, and then subjecting them to high temperatures to remove any impurities and strengthen the structure through the process of graphitization.

Q: Can carbon bricks be used in acidic environments?

A: Yes, carbon bricks are typically resistant to most acids at high temperatures, making them suitable for use in environments where acid resistance is necessary.

Q: What are the common uses of carbon bricks?

A: These bricks find applications in metallurgy, electric furnaces, and chemical industries due to their ability to withstand high temperatures without degrading. They are also used in the production of electrodes and as lining materials in high-temperature kilns.

Q: How do carbon bricks resist high temperatures?

A: Carbon bricks resist high temperatures through their microstructure, which includes a network of graphitic carbon that remains stable even at extreme temperatures, ensuring the material does not degrade or melt.

Q: Are carbon bricks environmentally friendly?

A: While carbon bricks themselves can be considered energy-efficient due to their use in high-efficiency industrial processes, their production involves the emission of greenhouse gases. Efforts are being made to improve the sustainability of the manufacturing process.

Q: Can carbon bricks be recycled?

A: Yes, carbon bricks can be recycled, though the process is complex. Recycled bricks can be reprocessed and used again, which contributes to reducing waste and conserving resources.

Q: What are carbon bricks primarily used for?

A: Carbon bricks are predominantly used in high-temperature applications due to their excellent thermal stability. Industries such as steelmaking, aluminum production, and chemical processing rely on these bricks for lining furnaces and reactors.

Q: How do carbon bricks compare to traditional firebricks?

A: Carbon bricks outperform traditional firebricks in terms of thermal conductivity and resistance to chemical corrosion. However, they can be more expensive and require specific handling due to their unique properties.

Q: What precautions should be taken when handling carbon bricks?

A: Due to their brittle nature, carbon bricks should be handled carefully to avoid breakage. Protective gear, like gloves and safety goggles, should be worn during installation to prevent injury from sharp edges.

Q: What is the typical lifespan of a carbon brick?

A: The lifespan of a carbon brick depends on its application and the conditions it's exposed to. In optimal conditions, they can last for many years without significant degradation.

Q: Do carbon bricks require special handling during installation?

A: To maximize their effectiveness and avoid damage, carbon bricks require careful handling during installation, often involving precise cutting and fitting techniques to accommodate size variations and thermal expansion.

Q: How long can carbon bricks last under continuous high-temperature conditions?

A: Under continuous high-temperature conditions, the longevity of carbon bricks varies; However, with appropriate care and maintenance, they can last several years, making them a reliable choice for demanding industrial environments.

Q: Is there a limit to the temperature that carbon bricks can withstand?

A: While carbon bricks can withstand extremely high temperatures, there is a limit to their thermal tolerance, typically around 3000°C, after which their structural integrity begins to compromise.

Q: How do you install carbon bricks?

A: Installation involves careful planning and consideration of the application environment. Bricks are cut to size as needed and laid out according to the design. Special refractory cements might be used to bond the bricks together, ensuring a tight seal that can withstand high-temperature operations.

Q: How do you maintain and inspect carbon bricks?

A: Regular inspections are crucial to ensure structural integrity. Cracks or signs of wear should be addressed immediately. Maintenance may include cleaning with specific solvents to remove any contaminants that could impact performance.

Q: How do carbon bricks contribute to energy efficiency in industrial processes?

A: Carbon bricks’ superior heat retention properties mean they can help in maintaining high temperatures with less fuel consumption, thus contributing to improved energy efficiency.

Q: How do you choose refractory material?

A: How do you select refractory materials? Refractories should have stable volume at high temperature and the residual expansion and contraction should be small. Heat capacity, thermal expansion coefficient, thermal conductivity and other thermal properties should meet the requirements.

Q: Are there different grades of firebrick?

A: Dense Firebrick (Hard Brick) is also available in multiple sizes and grades. Grades of Dense Firebrick are more commonly listed as “Low Duty”, “Medium Duty”, “High Duty” and “Super Duty”. As the grades increase, the thermal conductivity and strength will also increase while the porosity will decrease.

As one of the most professional carbon brick manufacturers and suppliers in China, we're featured by quality products and low price. Please rest assured to buy bulk customized carbon brick from our factory. Contact us for sample.

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