Introduction
Low-creep clay refractory bricks are made from high-quality raw materials with minimal impurities, such as dense, pure fused corundum, andalusite, and kyanite. These materials are combined with additives and binders, mixed according to a specific formula, thoroughly blended, formed under high pressure, and sintered at elevated temperatures. The lower the creep rate, the less deformation the bricks exhibit under high temperatures, ensuring greater stability as linings in thermal equipment. These bricks are commonly used in hot blast stoves.
Advantage
Ultra-low creep at high temperatures, long-term structural stability: No deformation under high temperature and load for consecutive years; checker bricks of hot blast stove avoid clogging, furnace walls free from collapse, extending equipment maintenance cycle to 5–8 years.
Significantly improved refractoriness under load:It resists softening at high temperatures and is suitable for load-bearing linings in all types of kilns.
High hot strength and excellent wear and erosion resistance: Low material loss under high-speed hot air scouring and dust abrasion conditions.
Excellent volume stability at high temperatures: Low thermal expansion and shrinkage during thermal cycling, reducing the widening of masonry joints, thereby decreasing air leakage and improving thermal efficiency.
Good resistance to CO corrosion and weak alkali erosion：It resists pulverization and spalling in the flue gas atmosphere of blast furnaces and coke ovens.
Excellent thermal storage performance：Its high density makes it ideal for regenerator checker bricks, providing superior heat exchange efficiency compared with ordinary clay bricks.
Good thermal shock resistance：It resists cracking and spalling during frequent furnace start-up and shutdown cycles.
Zinfon Refractory Technology Co.,Ltd.
We provide one-stop services from technical consultation to design, production, and after-sales support.
Raw Materials
Clay Minerals,High-Alumina Additives,Silica (SiO₂)
Physical and Chemical Specifications
| Item | Specification | |||
| DRN-128 | DRN-125 | DRN-120 | DRN-115 | |
| Al2O3 % | ≥45 | ≥45 | ≥42 | ≥40 |
| Fe2O3 % | ≤1.5 | ≤1.5 | ≤1.8 | ≤1.9 |
| Apparent Porosity, % | ≤15 | ≤20 | ≤20 | ≤22 |
| CCS, MPa | ≥60 | ≥45 | ≥35 | ≥35 |
| 0.2MPa Creep Rate, % | 1280℃×25h | 1250℃×50h | 1200℃×50h | 1150℃×50h |
| ≤0.25 | ≤0.8 | ≤0.8 | ≤0.8 | |
| PLC, % | 1400℃×2h | 1350℃×2h | 1300℃×2h | |
| -0.3~0.1 | -0.4~0.1 | -0.4~0.1 | ||
process
Raw material selection and impurity removal: Clay chamotte is washed and subjected to magnetic separation to remove iron impurities, followed by grading and screening; andalusite and mullite are separately subjected to ultrafine grinding.
Use precise raw material batching: Three-level proportioning of coarse particles, medium particles, and fine powder to control particle packing density.
Intensive Mixing: Water and aluminum phosphate binder are added, followed by thorough kneading to obtain a homogeneous mix free from segregation.
High-pressure Forming：Formed using 300–600-ton friction brick presses, the green bodies exhibit high density and low internal stress.
Stage Drying：Low-temperature pre-drying followed by medium-temperature drying to prevent cracking of the green bodies.
High-temperature Firing：Fired with prolonged holding at 1380–1430°C to achieve complete mullitization, resulting in moderate sintering without excessive vitrification.
Sorting and Physicochemical Inspection：Comprehensive inspection of creep, refractoriness under load, strength, and porosity, followed by grading, marking, and warehousing.
Applications
(1) Cement Industry: Used in transition zones, cooling zones, and preheaters of cement rotary kilns. These areas are exposed to high-temperature material erosion, thermal stress, and mechanical pressure. Low-creep clay bricks perform well under such conditions, reducing maintenance and improving efficiency.
(2) Glass Industry: Applied in pool walls and breast walls of glass kilns, which operate at high temperatures with large fluctuations. These bricks maintain their shape over long-term exposure, preventing issues like glass leakage. Their thermal shock resistance also helps during kiln start-up and shutdown.
(3) Metallurgical Industry: Used in furnace walls, roofs, flues, and other components of heating, annealing, and equalizing furnaces. They can withstand high temperatures and internal pressure, maintaining the integrity of the furnace structure.
(4) Other Fields: Suitable for high-temperature kilns in ceramics, chemical, and other industries where reliable refractory materials are essential for protecting equipment and processes.
Difference in use environment
Ordinary Clay Bricks:
Suitable for applications that do not require high refractoriness, such as non-critical parts of blast furnaces and hot blast stoves, flues, and chimneys operating below 750°C. While they can withstand moderate heat and mechanical stress, they are not ideal for prolonged use in high-temperature, corrosive, or high-load environments.
Low-porosity Clay Bricks:
Commonly used in steel, glass, and chemical industries where resistance to chemical erosion and thermal fluctuation is important. For example, in glass kiln regenerators and molten iron tanks, they offer erosion resistance, minimize heat loss, and extend equipment life.
Low-creep Clay Bricks:
Widely used in industrial furnaces such as anode roasters, hot blast stoves, iron furnaces, heating furnaces, and coke ovens. Especially effective in areas subject to high temperatures and long-term loading, such as furnace walls and vaults. They help prevent deformation due to creep, maintaining structural stability and ensuring reliable furnace operation.
Why chooes us?
01/Customized dimensions and shapes
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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
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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
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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
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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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