Pelindian Bijih Nikel Laterit Kadar Rendah Menggunakan Metode Atmospheric Acid Leaching Dalam Media Asam Klorida (Hcl)

Abstract

The Leaching of Low-GradeNickel Laterite Ore Using Atmospheric Acid Leaching Method in Hydrochloric Acid. Nickel laterite extraction using the hydrometallurgical method is more efficient in energy consumption with less exhaust gas than the pyrometallurgical method. This method causes the extraction of lowgrade nickel laterite ore using hydrometallurgy could be more effective. One of the hydrometallurgical methods to extract nickel from its ore is atmospheric acid leaching. This research aims to determine the percentage of nickel recovery through the leaching process, determine the most influenced leaching factor, and determine the optimum leaching condition. The main factors that influence the leaching process are temperature, acid concentration, and leaching time. Atomic adsorption spectroscopy was chosen to analyze the leaching solution. This research showed that the lowest recovery of nickel leaching was 9,40% of Ni, and the highest was 75,76% of Ni. Analysis of variance (ANOVA) was used to determine the most influenced factor of leaching. The most influenced factor was temperature (A), followed by acid concentration (B), duration (C), interaction of acid concentration-temperature

Extraction of Nickel from Morowali Laterite Ore with Nitric Acid

“…It happens because the longer stirring time causes the contact between the sample and the solvent to last longer so that the solubility increases; this indicates that with increasing time, the connection between the nickel laterite sample and the solvent in the leaching process becomes more optimum. As a result, the more optimal the contact of the sample with the solvent, the better the nickel metal-binding reaction by the solvent (Permana et al, 2020).…”

Pelindian Nikel Laterit Low-Grade Pomala Menggunakan Asam Organik Dan Asam Inorganik Pada Kondisi Atmosfir

“…Permana dkk., telah berhasil mengekstrak bijih nikel laterit kadar rendah menggunakan metode atmospheric acid leaching dalam media asam klorida. Hasil penelitian menunjukkan bahwa persentase perolehan nikel terendah adalah 9,40% Ni dan tertinggi 75,76% Ni [3]. Penelitian lainnya yang dilakukan oleh Gustiana dkk., memperlihatkan bahwa nikel dari bijih limonit Low-Grade Pomala telah berhasil diekstraksi menggunakan pelarut asam asetat [4].…”

“…Sementara itu, pada konsentrasi larutan 2M diperoleh nikel sebesar 0,900% dan 0,567%. Hasil ini tidak memperlihatkan hal yang sama dengan penilitian-penelitian sebelumnya yang dilakukan oleh Permana dkk, [3] dimana semakin tinggi temperatur proses pelindian menghasilkan persentase ekstraksi nikel yang tinggi pula. Peningkatan temperatur menyebabkan peningkatan persentase ekstraksi nikel disebabkan karena temperatur proses pelindian yang semakin tinggi akan menyebabkan pergerakan reaksi spesi yang berada dalam larutan semakin tinggi pula sehingga berpengaruh pada meningkatnya frekuensi tumbukan antara spesies yang menyebabkan tingginya produk reaksi yang terbentuk .…”