08

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.

10

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.

12

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.

12

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?

12

What are the weight and density requirements for fire-resistant bricks?

As a manufacturer of fire-resistant bricks, we’ve received numerous calls from customers asking: "How much do fire-resistant bricks weigh? What’s the weight of a firebrick?" The weight of a firebrick is determined by its bulk density, while the total weight of one ton of firebricks depends on both their individual bulk density and the number of bricks involved.

09

Process Measures for Repairing Surface Cracks on Blast Furnace Hot Blast Stove Shell

To assess the location, length, and depth of weld seams on the hot blast stove shell: First, use ultrasonic testing to identify the exact location, length, and depth of crack origins in each weld. Then, drill approximately 10–20 mm-long arrest holes at the ends of these crack origins. If the cracks are particularly long, they can be treated by dividing them into shorter segments.

09

Technical Requirements for High-Alumina Anchoring Bricks Used in Hot Furnaces

High-alumina anchor bricks are high-alumina refractory bricks designed with a specific shape, used to secure and connect by being installed on the steel structure of industrial kiln shells or furnace linings and embedded within the refractory material lining.