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

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

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

1 Citation (Scopus)

Abstract

Ferronickel slag is a by-product of nickel ore smelting that is categorized as hazardous and toxic waste to the environment that still contains valuable minerals such as nickel, iron, cobalt, and some rare earth elements. Further research is needed to become the solution of the environmental issues that this slag had caused and to find an alternative solution to the decrease in the world's minerals supply by re-using ferronickel slag. In this research, the ferronickel slag is first given alkaline fusion to create microcracks and to bind silica on the slag by mixing it with sodium carbonate and roast them at 1000°C and hold it for 60 min. Then followed by hot water leaching to separate silica from the slag at 100°C for 60 min. Next, the slag is leached by using 1,5 M sulfuric acid with the various temperature at room temperature, 50oC, 60°C, and 70°C with the various time that is 15, 30, 60, 90, and 120 minutes to get the most effective condition to dissolve the nickel and iron. The most effective condition to dissolve nickel and iron is expected at 70°C leaching temperature and 120 minutes of leaching. The result of this experiment is characterized by ICP (Inductively Coupled Plasma) to know how much nickel and iron had dissolved to the solution. The result of this research is 70°C leaching temperature and 120 minutes of leaching is the best condition to make the highest % of nickel and iron 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
  • leaching
  • sodium carbonate
  • sulfate acid

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