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Downstream demand in the high-temperature industries is recovering, and refractory brick manufacturers are seizing new opportunities in green refractories.

Recently, the refractory materials market has been steadily recovering, and as a fundamental consumable in high-temperature industries, refractory bricks are seeing continued improvements in their market demand structure.

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Structural adjustments in the refractory materials industry are accelerating, with high-end refractory bricks emerging as the primary growth driver.

Recently, China’s refractory materials and refractory brick industries have exhibited a pronounced structural divergence. Competition in the conventional, standard refractory brick market has intensified, with outdated production capacity continuing to be phased out. Meanwhile, high‑temperature kilns in the steel, cement, nonferrous metals, and new‑energy sectors are steadily increasing demand for long‑life, thermal‑shock‑resistant, low‑carbon refractory bricks, shifting the industry’s focus from mere capacity expansion to materials R&D and integrated, end‑to‑end service solutions.

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Debuting at the 2025 Guangxi International Mining Exhibition | Zhengzhou Zhenda Refractory Materials Bolsters China–ASEAN Cooperation in the Mining Industry

Recently, the 2025 Guangxi International Mining Exhibition was successfully held. Leveraging the China–ASEAN Mining Cooperation Platform, the event brought together upstream and downstream mining enterprises, industry associations, and professional buyers, serving as a vital bridge for product showcasing, technological exchange, and business matchmaking in the mineral and refractory materials sectors. Industry organizations such as the Guangxi Calcium Carbonate Industry Association also played an active role in the exhibition’s activities.

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What determines the wear resistance of firebricks?

The wear resistance of refractory bricks is influenced by temperature. For instance, certain refractories—such as high-alumina bricks—are generally believed to exhibit lower wear resistance at higher temperatures (specifically within their elastic range, typically below 700–900°C). This means that as the temperature rises and the refractory’s elastic modulus increases, its wear resistance tends to decline. However, once the temperature reaches a point where the elastic modulus peaks, further decreases in the modulus actually lead to improved wear resistance. For example, clay bricks demonstrate significantly better wear resistance at 1200–1350°C compared to room temperature conditions. Yet, if the temperature continues to rise beyond 1400°C, the rapid drop in viscosity of the liquid phase within the refractory material causes wear resistance to diminish again. On the other hand, some refractory materials—like chromium-containing refractories—actually show enhanced wear resistance as temperatures increase.

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Which refractory bricks can extend the service life of a converter steelmaking process?

To extend the service life of a converter, the lifespan of the refractory brick lining—known as the "converter village"—is directly influenced by its own durability. This can be broadly divided into two key aspects: First, operational conditions cannot be altered arbitrarily; they depend on the production processes and product-specific manufacturing routes, as well as the expertise of the operators. Second, implementing effective maintenance techniques—including regular inspections and repairs—and employing advanced furnace protection methods can significantly enhance the longevity of the furnace lining.

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How to determine the quality of high-alumina bricks when making your selection

There are many high-alumina brick manufacturers in the market, each claiming their own advantages. However, without the ability to distinguish between good and poor-quality bricks, it’s easy to fall for scams. To help you assess the quality of high-alumina bricks from Zhengzhou-based manufacturers, here’s a simple method for inspection and verification: 1. Check whether the dimensions of the Zhengzhou high-alumina bricks meet the specified requirements and ensure they are consistently uniform in size.

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What are the main areas where new refractory material technologies are making significant advancements?

1. Commercial performance optimization of raw materials is a prerequisite for high-quality refractory materials. 2. The production process has evolved from traditional macro-level control to precise micro-level management, shifting focus from material property testing to detailed observation and control of the material's microstructure—this is because the microstructure plays a critical role in determining the material's functional performance. 3. Refractory material packaging technologies are receiving increasing attention, with new packaging methods being continuously adopted. 4. Thanks to advanced techniques such as laser-based inspection and flame spraying repair, furnace linings can now undergo either intermittent or continuous monitoring, as well as regular or irregular maintenance, significantly extending their service life.

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What are the characteristics of new refractory material technologies?

1. Closely linked to the development of new technologies in other high-temperature industries; 2. Upgrading and replacing related production equipment and performance-testing devices is a prerequisite for adopting these new technologies; 3. Strongly connected to technological advancements in interdisciplinary fields; 4. Slightly lagging behind the progress in advanced ceramic and ceramic composite material technologies.

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Physicochemical Specifications of High-Alumina Anchoring Bricks for Heating Furnaces

The heating furnace consists of several key components, including the furnace roof, furnace walls, furnace floor, flue, and heat exchanger. Its inner lining is constructed using fire-resistant bricks. Below, we’ll introduce the physicochemical properties of high-alumina anchor bricks used in heating furnaces. Commonly used refractory bricks for heating and heat-treatment furnaces include clay bricks, high-alumina bricks, silica bricks, magnesia bricks, and carbonized brick products. Anchor and suspension bricks for heating furnaces are typically made from high-alumina materials with an Al₂O₃ content of 55% or higher. These bricks have a bulk density of approximately 2.34 g/cm³, a compressive strength exceeding 50 MPa, and exhibit a thermal expansion of around 0.05% after reheating at 1500°C. Suspension bricks are designed with a distinctive wave-like or serrated shape, featuring cross-sectional dimensions of 100 × 120 mm or 180 mm. Their length should surpass the thickness of the furnace lining, while ensuring that metal suspension components remain as far as possible from high-temperature zones or exposed areas. This design helps extend the service life of the bricks and simplifies maintenance and repair operations.

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High-Alumina Bricks: Tips for Identification

Tips for Identifying High-Alumina Bricks: 1. Examine the impurity ratio in the refractory brick. 2. Conduct a sintering test on high-alumina refractory bricks—this method is effective. 3. Weigh individual bricks; typically, high-alumina bricks come in multiple weights, and variations in weight often correlate with price differences. 4. Check the brick's color—good-quality refractory bricks are easy to distinguish by their hue. Generally, refractory bricks with higher aluminum content tend to have a bluish or whitish appearance. 5. Inspect the brick’s overall condition: Is the surface excessively rough, or does it show signs of chipping, missing edges, or unevenness?