https://www.umweltbundesamt.de/en/topics/increasing-the-recycling-of-precious-minor-metals
Precious and minor metals are playing an increasingly important role in the functionality of modern products and in future and environmental technologies....
minor metalsincreasingrecyclingpreciousumweltbundesamt
https://www.westfesi.com/index.php?c=show&id=162
553 Si:98.5%Min Fe:0.5%Max Al:0.5%Max Ca:0.30%Max441 Si:99%Min Fe:0.4%Max Al:0.4%Max Ca:0.10%Max3303 Si:99%Min Fe:0.3%Max Al:0.3%Max Ca:0.03%Max2202 Si:99%Min...
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