OPTIMIZATION OF FLOTATION OF THE QALEH ZARI MINE OXIDIZED COPPER ORE SAMPLE BY THE SEQUENTIAL SULFIDATION APPROACH USING THE RESPONSE SURFACE METHOD TECHNIQUE

Autor: Maleki, Hassan, Noaparast, Mohammad, Chehreghani, Sajjad, Saleh Mirmohammadi, Mir, Rezaei, Ali
Rok vydání: 2023
Předmět:
Zdroj: Rudarsko-geološko-naftni zbornik
Volume 38
Issue 1
ISSN: 1849-0409
0353-4529
DOI: 10.17794/rgn.2023.1.6
Popis: One of the main challenges in the copper oxide processing industry is the application of flotation to reduce operating costs. Sulfidation-flotation is a commonly employed approach for floating oxide minerals using sulfidizers in order to sulfide the mineral’s surface. In this research work, an oxidized sample from the Qaleh Zari copper mine was used which was a high grade with 5.4% of copper (malachite and azurite). The prepared sample was subjected to mineralogical studies, and the obtained results indicated that the sample was oxidized. Malachite and azurite were the predominant minerals of copper oxide, and the predominant waste minerals were quartz and iron oxides (hematite and magnetite). The addition of sodium sulfide and flotation in four consecutive steps was a successful approach to meet the proper recovery and grade. Sodium sulfide, amyl potassium xanthate, sodium sulfide preparation time, and pH were selected as operating parameters using a central composite design (CCD). Also, by measuring the zeta potential, the electric charge of malachite was determined in different conditions after adding chemicals. Finally, under optimal conditions, the consumptions of sodium sulfide and amyl potassium xanthate, sodium sulfide preparation time, and pH value were 6790 g/t, 736 g/t, 10 minutes, and 9, respectively. By applying the mentioned conditions, a concentrate with a grade of 22.13%Cu and 90.51% recovery was achieved.
U industriji oplemenjivanja odnosno prerade oksida bakra jedan od najvećih izazova jest smanjivanje operativnih troškova primjenom flotacije. Uobičajeno se u flotaciji oksidnih minerala površina minerala aktivira postupkom sulfidizacije. U ovome radu provedeno je istraživanje flotacije na uzorku oksidirane rude iz rudnika bakra Qalej Zari koja sadržava 5,4 % bakra (malahit i azurit). Pripremljeni uzorak podvrgnut je mineraloškim istraživanjima, a dobiveni rezultati pokazali su da je uzorak oksidiran. Od bakrovih oksida prevladavali su minerali malahit i azurit, a od jalovinskih minerala kvarc i željezni oksidi (hematit i magnetit). Aktivacija dodavanjem natrijeva sulfida te flotacija u četiri uzastopna koraka pokazali su se kao uspješan pristup za postizanje odgovarajućega iskorištenja i kvalitete. Za dizajn eksperimenta odabran je centralni kompozitni dizajn (CCD) s radnim parametrima: potrošnja aktivatora (natrijev sulfid), potrošnja kolektora (amilov kalijev ksantat), vrijeme aktivacije i pH. Također, mjerenjem zeta-potencijala određen je električni naboj malahita u različitim uvjetima nakon dodavanja kemikalija. Zaključno, u optimalnim uvjetima parametri su bili: potrošnja natrijeva sulfida 6790 g/t, amilova kalijeva ksantata 736 g/t, vrijeme aktivacije 10 minuta i pH vrijednost 9. Primjenom navedenih uvjeta dobiven je koncentrat sadržaja 22,13 % Cu i iskorištenja korisne komponente u koncentratu od 90,51 %.
Databáze: OpenAIRE
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