Study of graphite stoichiometry effect on the selective reduction of saprolite to percentage, recovery, and microstructure of nickel

Fathan Bahfie, Azwar Manaf, Widi Astuti, Fajar Nurjaman, Yepi Triapriani, Yayat Iman Supriyatna

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The selective reduction process and magnetic separation are the combination processes for separating nickel and iron. This process uses the addition of Na2SO4 and graphite. Those are the optimal of separation process to limit iron oxide because the reductanthas no volatiles. The stoichiometry of graphite plays an essential role because the carbon and energy needed are for the reduction. This experiment studied the effect of stoichiometry on the nickel grade, recovery, and grain size in the variation of graphite stoichiometry of 0.125, 1,and 1.5 with a reduction temperature of 1150 °C for 60 minutes and 10 % Na2SO4. XRD and XRF examined the mineralogical composition of the raw and reduced samples. The microstructure was analyzed by an optical microscope. The optimum result is in the 0.125 stoichiometry with nickel grade and recovery of 4.94 wt% and 86.18% and the grain size is large due to the amount of carbon is high.

Original languageEnglish
Title of host publicationAdvances in Metallurgy and Engineering Materials
Subtitle of host publicationCharacterizations and Innovation
EditorsJaka Fajar Fatriansyah, Deni Ferdian, Wahyuaji Narottama Putra, Akhmad Herman Yuwono, Donanta Dhaneswara, Nofrijon Sofyan
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735444669
DOIs
Publication statusPublished - 9 May 2023
EventInternational Meeting on Advances in Metallurgy and Materials 2020, i-MAMM 2020 - Virtual, Online
Duration: 16 Nov 202017 Nov 2020

Publication series

NameAIP Conference Proceedings
Volume2538
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

ConferenceInternational Meeting on Advances in Metallurgy and Materials 2020, i-MAMM 2020
CityVirtual, Online
Period16/11/2017/11/20

Fingerprint

Dive into the research topics of 'Study of graphite stoichiometry effect on the selective reduction of saprolite to percentage, recovery, and microstructure of nickel'. Together they form a unique fingerprint.

Cite this