Skip to main navigation Skip to search Skip to main content

High Purity Nickel Recovery from an Industrial Sidestream Using Concentration and Liquid-Liquid Extraction Techniques

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)
333 Downloads (Pure)

Abstract

This article outlines an alternative flowsheet for the purification of a multi-metal industrial sidestream (16.3 g/l Ni, 0.7 g/l Co, 0.6 g/l Ca and 1.6 g/l Mg) to allow high-purity nickel recovery. The methodology comprises an initial evaporation step to achieve Ca removal followed by impurity (Ca, Mg) and valuable (Co, Ni) element separation via two-step solvent extraction with organophosphorus extractants. Results indicate that > 80% of Ca is selectively removed as CaSO4 center dot 2H(2)O by evaporation with a concentration degree > 6. In the following treatment, 90% of residual Ca (0.6 g/l) can be selectively extracted with Na-D(2)EHPA. The subsequent solvent extraction step with Na-Cyanex 272 separates Co (> 99%) and Mg (> 95%). The resultant nickel sulfate solution (61.7 g/l Ni, 0.3 g/l Mg and Co 0.007 g/l) of > 99.5% purity can be directly integrated into state-of-the-art nickel recovery processes.

Original languageEnglish
Number of pages8
JournalJOM
DOIs
Publication statusPublished - 4 Dec 2019
MoE publication typeA1 Journal article-refereed

Funding

Open access funding provided by Aalto University. This work was supported financially by the BATCircle project (Grant No. 4853/31/2018) funded by Business Finland and the Chinese Scholar Council (CSC). The authors appreciate the use of facilities provided by the Academy of Finland's RawMatTERS Finland Infrastructure (RAMI-FIRI) based at Aalto University and also thank Hannu Revitzer for performing the ICP analyses. In addition, the Anhui Province Research and Development Innovation Project for Automotive Power Battery Efficient Recycling Systems is gratefully acknowledged.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

  1. SDG 13 - Climate Action
    SDG 13 Climate Action

Keywords

  • DIRECT SOLVENT-EXTRACTION
  • SODIUM-SALTS
  • SULFATE
  • PURIFICATION
  • COBALT
  • SEPARATION

Fingerprint

Dive into the research topics of 'High Purity Nickel Recovery from an Industrial Sidestream Using Concentration and Liquid-Liquid Extraction Techniques'. Together they form a unique fingerprint.

Cite this