The effect of leaching time and concentration of sulfuric acid on increasing nickel and cobalt content from ferronickel slag waste after alkaline fusion using sodium carbonate

Arryan Jibril R., Prinanda Doni Santoso, Agus Budi Prasetyo, Ahmad Maksum, Reza Miftahul Ulum, Johny Wahyuadi Soedarsono

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

Abstract

Ferronickel slag is a secondary product from nickel ore smelting that containing many valuable metals such as nickel, cobalt, iron, even rare earth elements. This research is conducted to become the solution to the environmental issues that happened because of this slag and the valuable metals that wasted because there is no further processing of the slag. In this experiment, ferronickel slag is first given an alkaline fusion using sodium carbonate to remove silica that has a big amount in the slag and followed by the hot water leaching to separate the silica. Then, the hydrometallurgy process is started using the sulfuric acid with various concentrations such as 0.2M, 0.4M, 0.6M and 0.8M with the various time that is 15, 30, 60, 90 and 120 minutes to get the most effective condition to dissolve the nickel. The sample and result of this experiment are characterized by Inductively Coupled Plasma process to know how much the nickel and cobalt dissolve and can be collected to become a new product. Sample characterization showed the presence of Ni 0.1013% and Co 0.0041% The result of this research is 0.2M H2SO4 and 15 minutes of leaching is the best condition to make the highest % of nickel extraction.

Original languageEnglish
Title of host publication4th International Tropical Renewable Energy Conference, i-TREC 2019
EditorsEny Kusrini, I. Gde Dharma Nugraha
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735420144
DOIs
Publication statusPublished - 3 Sep 2020
Event4th International Tropical Renewable Energy Conference 2019, i-TREC 2019 - Bali, Indonesia
Duration: 14 Aug 201916 Aug 2019

Publication series

NameAIP Conference Proceedings
Volume2255
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference4th International Tropical Renewable Energy Conference 2019, i-TREC 2019
CountryIndonesia
CityBali
Period14/08/1916/08/19

Keywords

  • Alkaline Fusion
  • Ferronickel Slag
  • HSO
  • Hydrometallurgy
  • NaCO

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