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Fire Clay Brick The main chemical components: Al2O3 content is 30%-48%, SiO2 content is 50%-65%, and a small number of alkali metals, metal oxides, etc. Mineral composition is usually mullite, quartz and glass phase. Its refractoriness is 1580-1750 °C, refractoriness under load is 1250-1450 °C, with good thermal resistance and strong ability to resist acid slag. Features: 1. Low thermal conductivity, good thermal insulation performance.2. Long service life, easy operation, could be shaped freely3. Product specification: standard form, normal standard, shaped and special shaped bricks.4. Can be