Analysis of holding time variations to Ni and Fe content and morphology in nickel laterite limonitic reduction process by using coal-dolomite bed

Fakhreza Abdul*, Sungging Pintowantoro, Ridwan Bagus Yuwandono

*Corresponding author for this work

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

14 Citations (Scopus)

Abstract

With the depletion of nickel sulfide ore resources, the nickel laterit processing become an attention to fulfill nickel world demans. Reducing laterite nickel by using a low cost carbonaceous reductan has proved produces high grade ferronickel alloy. In this research, reduction was carried out to low grade laterite nickel (limonite) with 1.25% nikel content by using CO gas reductant formed by reaction between coal and dolomite. Reduction process preceded by forming brickets mixture from limonit ore, coal, and Na2SO4, then the brickets placed inside crucible bed together with dolomit and reduced at temperature 1400 °C with holding time variations 4, 6, and 8 hours. EDX, XRD, and SEM test were carried out to find out the Ni and nickel grade after reduced, the phases that formed, and the morphology brickets after reduced. The reduction results shows that the highest increase on nickel grade was obtained by 8 hours holding time increasing 5.84 % from initial grade, and the highest recovery was obtained by 6 hours holding time with recovery 88.51 %. While the higest increase on Fe grade was obtained by 4 hours holding time, and the highest recovery Fe was obtained by 4 hours holding time with recovery 85.41%.

Original languageEnglish
Title of host publicationProceedings of the 3rd International Conference on Materials and Metallurgical Engineering and Technology, ICOMMET 2017
Subtitle of host publicationAdvancing Innovation in Materials Science, Technology and Applications for Sustainable Future
EditorsMas Irfan P. Hidayat
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735416406
DOIs
Publication statusPublished - 3 Apr 2018
Event3rd International Conference on Materials and Metallurgical Engineering and Technology: Advancing Innovation in Materials Science, Technology and Applications for Sustainable Future, ICOMMET 2017 - Surabaya, Indonesia
Duration: 30 Oct 201731 Oct 2017

Publication series

NameAIP Conference Proceedings
Volume1945
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference3rd International Conference on Materials and Metallurgical Engineering and Technology: Advancing Innovation in Materials Science, Technology and Applications for Sustainable Future, ICOMMET 2017
Country/TerritoryIndonesia
CitySurabaya
Period30/10/1731/10/17

Keywords

  • Crucible Bed
  • Holding time
  • Nickel Limonitic
  • Reduction

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