Introduction
High chrome brick is a shaped refractory product manufactured from industrial-grade chromium trioxide and alumina as the primary raw materials, with the addition of a small amount of zirconium oxide or other additives, through high-temperature firing.
High chrome bricks exhibit excellent resistance to erosion by FeO–SiO₂, SiO₂–CaO, SiO₂–MgO, and their ternary slag components. They can withstand operating temperatures exceeding 1800°C and are suitable for use in reducing, oxidizing, acidic, and alkaline environments. They are primarily used in furnaces with high fluoride content.
Advantage
High Fire Resistance: Significantly exceeding that of conventional refractory products, these bricks maintain structural stability in high-temperature environments, resist softening and deformation, and are suitable for industrial furnaces, kilns, and other thermal equipment with extremely high temperature requirements.
High-Temperature Strength: They retain high strength under elevated temperatures, exhibit excellent abrasion and impact resistance, withstand scouring and friction from furnace materials, and extend the service life of furnace linings.
Strong Erosion Resistance: These bricks demonstrate good resistance to acidic, alkaline, and other chemical substances, resist corrosion from slag and gases in the furnace, ensuring the integrity and stability of the furnace lining.
High Thermal Conductivity: They feature high thermal conductivity, enabling rapid heat transfer within the furnace, improving energy utilization efficiency, and reducing energy consumption.
Zinfon Refractory Technology Co.,Ltd.
We provide one-stop services from technical consultation to design, production, and after-sales support.
Raw Materials
The chromium trioxide content is not less than 75%, and the combined content of chromium trioxide, aluminum oxide, and zirconium oxide is not less than 98%.
Physical and Chemical Specifications
|
Item |
ZFC-75 |
ZFC-85 |
ZFC-90 |
ZFC-95 |
|
|
Cr203 |
% |
75 |
85 |
90 |
95 |
|
Cr203+Al2o3+Zr203 |
% |
98 |
98 |
98 |
98 |
|
Sio2 |
% |
0.2 |
0.2 |
0.2 |
0.2 |
|
Fe2o3 |
% |
0.3 |
0.3 |
0.3 |
0.3 |
|
K2O+Na20 |
% |
0.2 |
0.2 |
0.2 |
0.2 |
|
Apparent Porosity |
% |
18 |
18 |
16 |
16 |
|
Bulk Density |
g/cm3 |
3.9 |
4.2 |
4.22 |
4.25 |
|
Cold crushing Strength |
Mpa |
120 |
120 |
120 |
120 |
Process
Raw Material Preparation: High-purity industrial-grade chromium trioxide, alumina, etc., are selected as the main raw materials, with a small amount of zirconium oxide or other additives possibly incorporated as needed. The raw materials are crushed and ground to achieve a suitable particle size distribution, ensuring the performance of the final products.
Mixing and Blending: Various raw materials are proportioned according to specific ratios and thoroughly mixed to ensure uniform distribution of components in the final products.
Molding: The mixed raw materials are formed into the required brick shapes using methods such as press molding or isostatic pressing.
Firing: The molded bricks are placed in a high-temperature kiln for firing, during which the raw materials undergo a series of physicochemical reactions under high temperature to form stable mineral phases, thereby achieving excellent refractory and mechanical properties.
Application
Iron and Steel Smelting Industry
Key Components of Blast Furnaces
Application Areas: High-temperature, high-erosion zones such as the bosh, waist, and lower stack.
Function: Withstands scouring and chemical erosion from high-temperature gases (temperatures exceeding 1500°C) and slag, particularly in high-alkalinity slag environments. Prolongs furnace lining life and reduces maintenance frequency.
Basic Oxygen Furnaces (BOF) and Electric Arc Furnaces (EAF)
Application Areas: Slag line zones and hearth bottoms of furnace linings.
Function: Resists severe scouring from molten steel and oxidized slag, withstands erosion from alkaline substances (e.g., FeO, CaO), ensuring smelting process stability.
Glass Industry
Glass Melting Furnace Walls and Hearth
Application Scenario: With glass melt temperatures reaching 1400–1600°C, furnace walls directly contact high-temperature glass melt and volatile substances (e.g., Na₂O).
Advantages: Exhibits strong resistance to glass melt erosion, reduces impurity contamination in the glass melt. Meanwhile, its high thermal conductivity equalizes furnace temperature, enhancing glass melting quality and production efficiency.
Regenerator Checkerwork
Function: Recovers heat from high-temperature flue gas. The high-temperature strength of high-chrome bricks resists thermal shock and dust scouring, improving heat exchange efficiency.
Non-Ferrous Metal Smelting
Copper, Aluminum, and Zinc Smelting Furnaces
Application Areas: Tuyere zones and slag lines of copper smelting furnaces, sidewalls of aluminum electrolyzers, etc.
Advantages: Resists erosion from copper slag and aluminum electrolytes (e.g., cryolite). For instance, in copper smelting, it withstands corrosion from FeS–Cu₂S melts, extending furnace lining service life.
Precious Metal Refining Furnaces
Function: Maintains structural stability at high temperatures (e.g., 1700°C or higher), preventing reactions between precious metal melts and furnace linings to ensure product purity.
Energy and Environmental Protection
Coal-Water Slurry Pressurized Gasifiers
Application Location: Lining of the gasification chamber, exposed to high-temperature gases and slag (composed mainly of CaO, SiO₂) at 1400–1600°C.
Advantages: Exhibits strong resistance to slag erosion and high thermal conductivity, enabling rapid heat dissipation to protect the furnace wall's metal structure.
Waste Incinerators and Hazardous Waste Treatment Furnaces
Application Scenario: Lining of incinerators, designed to withstand erosion from complex flue gases (containing acidic components such as HCl, SO₂) and high-temperature ash.
Characteristics: Resistant to corrosion by acidic and alkaline gases, inhibits penetration of harmful components, and maintains high-temperature stability for prolonged operation.
Chemical and Refractory Industries
High-Temperature Chemical Reaction Furnaces
Application Scenarios: Examples include calcium carbide furnaces, ferroalloy furnaces, etc., used for smelting high-melting-point chemical materials.
Function: Resists erosion from molten reactants (e.g., CaC₂) and maintains the high-temperature environment within the furnace.
Refractory Material Kilns
Application Location: Serves as kiln linings for firing other refractory products, withstanding the high temperatures generated during the production process.
Other Special Fields
Nuclear Industry High-Temperature Equipment
Used in specific nuclear reaction devices for high-temperature and radiation-resistant components (requires special modification).
Ceramic Sintering Furnaces
Used for sintering high-purity ceramic materials, preventing furnace lining impurities from contaminating the product.
High Chrome Brick Application Advantages
| Application Scenario | Core Requirements | Performance Matching Points of High-Chrome Bricks |
|---|---|---|
| Iron & Non-Ferrous Metal Smelting | Resistance to high-temperature slag and molten metal erosion | High Cr₂O₃ content resists alkaline slag; high-temperature strength prevents scouring |
| Glass Melting Furnaces | Resistance to glass melt corrosion and uniform heat conduction | Resistance to oxides (e.g., Na₂O); high thermal conductivity |
| Energy & Environmental Protection Equipment | Resistance to complex atmospheres and high-temperature ash | Resistance to acid/alkaline gases; strong thermal shock resistance |
Application Precautions
Temperature Control
Avoid prolonged exposure to temperatures exceeding 1700°C to prevent Cr₂O₃ from reacting with slag, which exacerbates erosion.
Atmosphere Compatibility
In strongly reducing atmospheres (e.g., excess CO), Cr₂O₃ may undergo reduction. Use with caution in such conditions.
Masonry Practices
Use matching high-chrome refractory mortar to ensure joint sealing and prevent slag penetration.
Why chooes us?
01/Customized dimensions and shapes
-
Customized Brick Shape
Provide Sample Sheets--Mold Opening & Quotation--Mold Opening & Sample Making--Bulk Production Quotation--Contract Signing--Bulk Production
02/Delivery cycle and logistics
-
Sea freight, land freight. Determine the mode of transportation according to the needs
About 30 days, customized products delivery time depends on the actual situation.
03/Customized packaging
-
Customize your brand
Logo customization, custom fonts, taglines and messages for packaging, signage, websites or printed materials.
Take your brand to the next level, contact us today to discuss your project!
04/Purchase ZINFON refractory Bricks at Reasonable Prices
-
We recognize that pricing is a critical factor in our customers' purchasing decisions. Leveraging our proximity to abundant mineral resources and advanced manufacturing technologies, we offer competitive pricing without compromising on quality. Our strategic location minimizes raw material costs, while economies of scale achieved through state-of-the-art processes further reduce unit production expenses.
It is worth noting that while price is an important factor, it should not be the sole determinant of your purchasing decision. When buying refractory bricks from ZINFON, quality, reliability, and technical support are equally important considerations.
By choosing ZINFON as your supplier, you can access high-quality refractory bricks, a wide range of other refractory materials, and comprehensive support. Contact ZINFON Refractories immediately to discuss your specific requirements and obtain customized solutions!
7*24 hours online response
Provide professional after-sales protection
Our address
Qinghua Management Dist., Dashiqiao City, Yingkou City, Liaoning, China
Phone Number
+8613700131695
+8618540210631
info@zinfon-refractory.com
Hot Tags: high chrome brick, China high chrome brick manufacturers, suppliers, factory, Fused AZS Brick, zircon bricks, Fused Zirconia Corundum Brick, zirconium corundum, Dense Zircon Brick, Fused Corundum Brick