Lightweight high alumina bricks
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Time：
2024-04-29
Lightweight high alumina bricks generally refer to various lightweight refractory products containing over 45% AlO3. Usually divided into two categories: one is ordinary lightweight high alumina bricks made from natural high alumina bauxite clinker as raw material; Another type is lightweight high alumina products made from fused or sintered alumina, also known as lightweight corundum bricks due to their main crystalline phase being corundum.
Light high alumina brick is generally produced by foam method. After grinding, clinker is mixed with binder (such as clay) and foaming agent to prepare slurry, poured and molded, and fired at 1350~1500C. The volume density of general lightweight high alumina bricks is 0.4-1.35 g/cm3, the porosity is 66%~73%, the compressive strength is 1.3-8.1 MPa, and the thermal conductivity is 0.291-0.582 W/(m+K) (350C). Lightweight high alumina bricks have high fire resistance and good thermal shock resistance, and are commonly used as high-temperature insulation layers in kilns. Lightweight high alumina bricks can be used for furnace linings in direct contact with flames, but are not suitable for situations where slag directly corrodes. Due to the good chemical stability of lightweight high alumina bricks in reducing atmospheres, kilns that use gases such as hydrogen and carbon monoxide as protective atmospheres generally use lightweight high alumina bricks as insulation linings. The usage temperature of lightweight high alumina bricks is 1350-1500C, and the usage temperature of high-purity products can reach 1650-1800C. According to Chinese standards, lightweight high alumina bricks are classified into several grades based on volumetric density, including LG-1.0, LG-0.9, LG-0.8, LG-0.7, LG-0.6, etc.
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Henan Yutai High Temperature New Material Technology Co., Ltd.
Company name: Henan Yutai High Temperature New Material Technology Co., Ltd.
Email: benzhao4202@gmail.com
WhatsAPP: +86 13393711201
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