Introduction
Dense zircon bricks are high-performance refractory materials made primarily from zircon (ZrSiO₄). Produced through the selection of high-purity raw materials, high-pressure molding, and high-temperature sintering, these bricks possess a dense structure and excellent corrosion resistance. They are widely used in high-temperature industries such as glass and metallurgy.
The main crystalline phase in dense zircon bricks is zircon (ZrSiO₄), a white solid with a high melting point, high packing density, and extremely low porosity. At elevated temperatures, these bricks demonstrate exceptional erosion resistance, slag resistance, dimensional stability, and thermal shock resistance, making them premium materials within the zircon-based refractory category.
These bricks exhibit a dense crystal structure, high bulk density, substantial mass, high mechanical strength at both room and elevated temperatures, excellent thermal shock resistance, minimal re-firing shrinkage, and low high-temperature creep. Additionally, they possess outstanding chemical stability and strong resistance to alkaline media.
Advantage
1. High Purity and Dense Structure
Raw Material Characteristics:
Using zircon (ZrSiO₄) as the primary raw material, with ZrO₂ content typically ≥65% and SiO₂ around 32–35%. Impurities (e.g., Fe₂O₃, CaO) are kept below 0.5%, resulting in higher purity compared to ordinary refractory bricks.
Physical Structure:
High-pressure molding (≥300 MPa) and sintering at temperatures above 1,750°C yield a bulk density ≥3.8 g/cm³ (close to 98% of theoretical density) and apparent porosity ≤1.5%. The result is an extremely dense, almost pore-free structure.
2. Excellent High-Temperature Resistance and Corrosion Performance
Temperature Tolerance:
With a melting point above 2,500°C, the bricks can operate continuously at 1,700–1,800°C. The creep rate at 1,550°C is <0.5% over 10,000 hours, ensuring long-term structural stability at high temperatures.
Corrosion Resistance:
Outstanding resistance to glass melts (e.g., silicate and borate glasses), with an annual erosion rate of <0.1 mm at 1,550°C-superior to AZS and corundum bricks. Also resists slag from non-ferrous metals (e.g., copper, aluminum, lead), fluorides (HF, SiF₄), and acidic gases (SO₂, Cl₂). In phosphate fertilizer rotary kilns, service life is extended by 40% compared to high-alumina bricks.
3. Exceptional Thermal Shock Resistance and Mechanical Properties
Thermal Shock Resistance:
Low thermal expansion coefficient (4.5–5.5 × 10⁻⁶/°C between 20–1000°C). Withstands over 15 water-quenching cycles at 1100°C without cracking. Ideal for conditions with rapid temperature changes (e.g., startup/shutdown phases of glass kilns).
Mechanical Strength:
Room-temperature compressive strength ≥300 MPa; flexural strength ≥45 MPa. High hardness (Mohs 7–8), offering excellent resistance to mechanical wear and abrasion.
4. Chemical Stability and Low Contamination Risk
Virtually no chemical reaction with glass melts or molten metals, making these bricks especially suitable for high-end applications such as optical glass and high-purity metal smelting.
Maintains excellent stability in oxidizing atmospheres. Avoid use in strong reducing conditions (e.g., CO concentration >5%), where ZrO₂ may reduce to ZrC, causing expansion and cracking.
Zinfon Refractory Technology Co.,Ltd.
We provide one-stop services from technical consultation to design, production, and after-sales support.
Raw Materials
Zircon (ZrSiO₄)
Theoretical composition: 67.2% ZrO₂ and 32.8% SiO₂
Actual raw material requirement: ZrO₂ ≥ 65%, SiO₂ 32–35%, total impurities (Fe₂O₃, TiO₂, CaO, MgO) < 0.5%
Physical and Chemical Specifications
|
Item |
Specification |
|
|
ZS-G |
ZS-Z |
|
|
ZrO2 % |
≥65 |
≥68 |
|
SiO2 % |
≤33 |
≤30 |
|
Fe2O3 % |
≤0.2 |
≤0.2 |
|
TiO2 % |
≤1.2 |
≤1.2 |
|
Bulk Density, g/cm3 |
≥4.3 |
≥4.1 |
|
Apparent Porosity, % |
≤1 |
≤8 |
|
CCS, MPa |
≥300 |
≥200 |
|
0.2MPa RUL℃ |
≥1700 |
≥1700 |
Process
Raw Material Preparation → Pretreatment → Ingredient Calculation → Mixing → Molding → Drying → High-Temperature Sintering → Post-Treatment → Quality Inspection → Packaging and Storage
Applications
I. Glass Industry
Application Scenarios:
Key components of glass melting kilns, including the pool wall, flow holes, feed channels, and breast walls
Bushings, crucibles, and high-temperature channels for glass fiber production
Advantages:
Strong resistance to erosion from glass melts, especially those containing boron and fluorine
High chemical stability at elevated temperatures, minimizing contamination of glass
Low thermal conductivity improves energy efficiency by reducing heat loss
II. Metallurgical Industry
Application Scenarios:
Linings of steel ladles and tundishes
High-temperature components of blast furnaces and electric furnaces
Non-ferrous metal smelting furnaces and casting equipment (e.g., aluminum, copper)
Advantages:
Withstands high temperatures (≥1750°C) and thermal shock during smelting
Excellent slag resistance, preventing infiltration and corrosion
Stable performance during temperature fluctuations in the smelting process
III. Ceramics and Refractories Industry
Application Scenarios:
Linings, saggers, and support parts for ceramic sintering furnaces
High-temperature kiln furniture for refractory manufacturing (e.g., push plates, setter plates)
Advantages:
Maintains dimensional stability and structural integrity at high temperatures
Excellent wear resistance, extending the life of kiln components
IV. Chemical and Energy Industry
Application Scenarios:
Linings for chemical reactors and incinerators exposed to corrosive gases or liquids
High-temperature containers or shielding in the nuclear industry (leveraging zirconium's nuclear properties)
Advantages:
High chemical resistance in acidic or alkaline conditions
Zirconium offers nuclear stability for specialized applications in energy sectors
Performance and Applications
| Performance Feature | Application Advantage |
|---|---|
| High Refractoriness | Suitable for ultra-high-temperature environments; resists melting and deformation |
| Excellent Erosion Resistance | Resists glass melts, slags, and chemicals; reduces wear and maintenance costs |
| Good Thermal Stability | Tolerates rapid temperature changes; prevents cracking |
| Low Thermal Conductivity | Improves insulation; reduces energy loss in kilns |
| Chemical Inertness | Prevents contamination in sensitive processes; ensures product purity |
Why chooes us?
01/Customized dimensions and shapes
-
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
-
The price of refractory bricks is a known key factor influencing customers' purchasing decisions. Therefore, we offer affordable refractory bricks for sale. Here are several reasons why ZINFON provides refractory bricks at competitive prices:
Factory price
By collaborating with ZINFON, we ensure that customers enjoy the ex-factory price of refractory bricks, reducing costs from middlemen or distributors. This allows customers to obtain the most cost-effective pricing directly from the source.
Low raw material cost
ZINFON is surrounded by abundant mineral resources. With these high-quality materials, customers can obtain products that are both affordable and excellent in performance.
Mass production
ZINFON possesses advanced production equipment and technologies, enabling the factory to achieve economies of scale and reduce unit production costs. Meanwhile, it ensures a continuous supply of high-quality products at preferential prices.
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
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