Acid refractory material

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A general term for those types of refractory material that contain a high proportion of silica; e.g., silica refractories (greater than 92% SiO2) and siliceous refractories (78% to 92% SiO2). The name derives from the fact that silica behaves chemically as an acid and at high temperatures reacts with bases such as lime or alkalies. Dodd
Source: Dictionary of Mining, Mineral, and Related Terms

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