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Beneficial uses of spent foundry sands sustainable ,jan 26, 2021 beneficial uses for spent foundry sands. epas risk assessment for the beneficial uses of spent foundry sands found that that silica-based spent foundry sands produced by iron, steel and aluminum foundries can be safely reused to save energy, reduce the need to mine virgin materials, and reduce costs for both producers and end users. epa supports the use of silica-based spent foundry sands
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