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This paper characterizes the crystalline phases present in waste foundry sands prepared based on a quartz sand matrix. The main component of the examined waste is quartz, which is accompanied by its polymorphic forms: tridymite and cristobalite. In addition to quartz, iron oxides such as magnetite, hematite and occasionally wüstite, and grains represented by metallic iron precipitation and Cu-Zn-Pb...
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