Pengaruh Jenis Asam & Konsentrasi Asam Terhadap Persentase Ekstraksi Nikel Dari Bijih Nikel Laterit Pomalaa Sulawesi Tenggara

Authors

  • sayid muh aidil alkaf sayid zen teknik metalurgi
  • Emsal Yanuar

DOI:

https://doi.org/10.36761/hexagon.v5i1.3237

Keywords:

Leaching Of Nickel, Laterite Nickel, Preliminary & Final Characterization, Acid Type & Acid Concentration.

Abstract

Nickel Laterit is formed from the chemical weathering of rocks over a long period of time on subtropical surfaces. Usually, laterite nickel has relatively low grades but is abundant. In general, further processing is carried out by the hydrometallurgical method with a leach line. Leaching was carried out with 3 different solvent namely H2SO4, CH3COOH, and H3PO4. To determine nickel recovery from leaching, characterization was carried out using Atomic Absorption Spectropothometry (AAS), XRF to determine the initial nickel laterite content and XRD to determine the mineral composition contained in laterite minerals. The XRF results obtained a nickel content of 5,67% and showed a lo grade laterite mineral belonging to the saprolite type. The XRD results show that the phases present in calcination at 450?C are Hematite, Magadiite, and Quartz phasess while in Uncalcinate they form Hematite, Awaruite, and Geotithe phases. For testing Atomic Absorption Spectrophotometry, the results obtained from nickel extraction were affected by the type of acid and acid concentration with a prevalence of 48,21% (4 M) for Sulfuric Acid, 41,51% (4 M) for Phosphoric Acid, and 10,27% (4 M) in Acetic Acid. The results showed that the type of acid and acid concentration had a significant effect on the leaching of lowgrade nickel laterite obtained from Pomalaa, Southeast Sulawesi. For the type of acid, if the type of acid used is concentrated acid, the higher the proportion of nickel extraction obtained, while for the acid concentration, the higher the concentration of solvent used, the higher the yield of nickel extraction.

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Published

2024-01-31