After working in the high-temperature kiln industry for more than ten years, I have observed one thing: when many purchasing and technical personnel select integrated furnace bricks, the first thing they are most accustomed to asking is - 'What is the content of aluminum oxide (Al₂O₃)?' 68%, 75%, 80%...the higher the number, the more secure it seems. But to be honest, choosing a brick based on its Al₂O₃ content is like buying a car based only on its engine displacement. Large displacement does not necessarily mean stable running, and high content does not necessarily mean durability. Today we will talk about, in addition to the composition report, when choosing integrated furnace bricks in 2026, you should also look at several more critical indicators.

This article combines 2026 industry standards and practical application experience to sort out the key points of the entire process of high alumina brick selection to help you accurately avoid pitfalls and choose the right product. Combined with the needs of different working conditions, accurate high alumina brick selection recommendations are given, taking into account performance and cost, and adapting to various industrial scenarios. 1. General scenarios for medium and low temperatures (≤1200°C, low erosion): Priority is given to three-level ordinary sintered high-alumina bricks, which have outstanding cost performance and are suitable for hot blast stoves, chimney linings, and low-temperature sections of kilns to reduce procurement costs. 2. Medium-temperature conventional scenarios (1200-1400°C, large temperature fluctuations): Second-level ordinary sintered high-alumina bricks are recommended, with balanced performance and good thermal shock resistance. They are suitable for conventional working conditions such as ceramic kilns, cement rotary kilns, preheating zones, and cooling zones. 3. Medium-high temperature and high erosion scenarios (1300-1500°C, slag/flue gas erosion): Use low-pore high-alumina bricks, which have strong corrosion resistance and erosion resistance. They are suitable for core parts such as glass melting furnaces and blast furnaces to reduce the frequency of replacement. 4. Medium-temperature and high-wear scenarios (≤1300°C, acidic environment): Use phosphoric acid-bonded high-aluminum bricks, which are resistant to peeling and wear. They are suitable for chemical reactors and electric furnace tops, taking into account both construction efficiency and use effects. 5. Key high-temperature scenarios (≥1400℃): Use first-grade sintered high-alumina bricks with Al₂O₃ content ≥75%, high temperature resistance and high strength, suitable for boiler main furnaces and steel smelting core linings.