11.25 Clay Processing - US EPA
rification point below 1100°C (2000°F). Shale is a laminated sedimentary rock that is formed by the consolidation of clay, mud, or silt. Common clay and shale are composed mainly of illite or chlorite, but also may contain kaolin and montmorillonite. Most domestic clay is mined by open-pit methods using various types of equipment, including
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