| difference | Alumina silicate fire brick | high alumina brick |
|---|---|---|
| Element | The main components are aluminum oxide (Al₂O₃) and silicate | The main component is alumina (Al₂O₃), the content of which is usually above 48%. |
| performance | Refractoriness, refractoriness under load, slag resistance, thermal shock resistance and other properties will vary depending on the specific chemical composition and manufacturing process. | High refractoriness, generally not less than 1770℃; load softening temperature is generally around 1400℃; good slag resistance; poor thermal shock resistance, generally only 3-5 times of water cooling |
| use | According to the specific chemical composition and physical properties, it can be used for lining of various high-temperature industrial furnaces, such as blast furnaces, hot blast furnaces, aluminum melting furnaces, etc. | Widely used in the lining construction of high-temperature industrial furnaces in the steel, cement, glass and other industries |
It should be noted that the term “high alumina brick” is sometimes used to refer to all refractory bricks containing a higher proportion of alumina, including some special high alumina bricks such as corundum bricks (alumina content greater than 95%). Therefore, when discussing specific high alumina bricks, it is best to provide more detailed chemical composition and performance indicators.