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All Journal Jurnal Rekayasa Proses
Putri, Yolanda Dwika
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Chemical Engineering, Chemistry & Bioengineering

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Reductive leaching of low-grade manganese ores from Way Kanan using corncob as reductant Putri, Yolanda Dwika; Lesmana, Donny; Ginting, Simparmin Br; Sujoto, Vincent Sutresno Hadi
Jurnal Rekayasa Proses Vol 17 No 1 (2023): Volume 17, Number 1, 2023
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.70372

Abstract

The processing of mining products in indonesia has not been utilized optimally. One of them is manganese ore. Way kanan is one of indonesia's potential manganese ore sites. The manganese leaching study used a -200 mesh way kanan manganese ore that was reacted with sulfuric acid at concentrations of 0.1 M, 0.5 M, and 1 M, as well as corncob as a reductant. To separate the dissolved iron in the leaching process, the manganese sulfate solution was purified with sodium hydroxide and then filtered to have a manganese sulfate solution free of iron. Manganese was precipitated using oxalic acid. The manganese oxalate precipitation was calcined at a temperature of 350 °c for two hours. The best manganese extraction obtained at 92.3% was at a sulfuric acid concentration of 1 M, a temperature of 80 °c, and a solution volume of 400 ml. Calcination of manganese oxalate converted the material into hausmannite (Mn3O4).
Co-Authors Donny Lesmana Simparmin br Ginting Sujoto, Vincent Sutresno Hadi