Waste foundry sand and its leachate .
01.10.2010· Depending on the binder and type of metal cast, the pH of spent foundry sand can vary from approximately 4–8 has been reported that some spent foundry sands can be corrosive to metal. 1.4. Applications of waste foundry sand. Metal casting foundries in the US disposed of approximately 9 million metric tons of waste foundry sand in landfills in 2000 (Winkler and Bol'shakov, 2000). Given .