Effect of binary basicity (CaO/SiO2) on selective reduction of lateritic nickel ore

Fajar Nurjaman, Khulud Saekhan, Fathan Bahfie, Widi Astuti, Bambang Suharno

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6 Citations (Scopus)


A selective reduction method is being developed in processing lateritic nickel ore to produce high nickel grade's ferronickel using low temperature or energy consumption. This research was carried out to study the effect of binary basicity (CaO/SiO2) in the selective reduction process. The lateritic nickel ore containing 1.38% Ni and 38.2% Fe was used in this study. The reduction was performed at 1150°C for 60 minutes in a muffle furnace with the addition of sodium sulfate (additives), bituminous coal (reductant), and calcium oxide (basicity modifier). The optimum nickel grade in the selective reduction of lateritic nickel ore was obtained from the 0.1 of binary basicity, which was 6.14 %Ni, due to the breakage of iron and nickel in magnesium silicate bond into metallic iron and nickel. Further increasing of binary basicity decreased the nickel grade of ferronickel due to the formation of a high melting point phase.

Original languageEnglish
Pages (from-to)91-97
Number of pages7
JournalPeriodico di Mineralogia
Issue number2
Publication statusPublished - 2021


  • Additive
  • Binary basicity
  • Lateritic nickel ore
  • Reductant
  • Selective reduction


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