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Vojnotehnički glasnik
2020, vol. 68, br. 1, str. 65-78
jezik rada: engleski
vrsta rada: pregledni članak
objavljeno: 02/02/2020
doi: 10.5937/vojtehg68-21152
Creative Commons License 4.0
Taloženje silicijum-dioksida u hidrometalurškim procesima
RWTH Aachen University, IME Process Metallurgy and Metal Recycling, Aachen, Federal Republic of Germany

e-adresa: sstopic@ime-aachen.de, bfriedrich@ime-aachen.de

Projekat

The research leading to these results received funding from the European Community's Seventh Framework Programme (Call identifier FP7-NMP-2012-LARGE-6) under Grant Agreement n°309373

Sažetak

Uvod/svrha: Rastvaranje obojenih metala iz oksidnih ruda, kao što su lateriti, boksiti sa visokim sadržajem silicijuma i eudialit, korišćenjem kiselina povezano je sa stvaranjem gela od silicijum-dioksida. Metode: Sličnost sa ponašanjem silicijum-dioksida u hidrometalurškim procesima, kao što su rastvaranje pri atmosferskom i visokom pritisku, taloženje, neutralizacija i filtriranje, od velikog je značaja za izvlačenje metala iz rastvora. Rezultati: Izbegavanje formiranja gela omogućeno je korišćenjem rastvaranja velikim koncentracijama kiselina ("suvo rastvaranje") i apsorpcijom ugljen-dioksida od olivina pri visokom pritisku u autoklavu. Zaključak: Priprema finog praha silicijum-dioksida iz olivina u vodenom rastvoru postignuto je na 175°C i 120 bara za 4 sata u autoklavu korišćenjem dodataka kao što su natrijumbikarbonat i oksalna kiselina.

Ključne reči

silicijum; hidrometalurgija; gel; silicijumdioksid

Reference

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