Dissolution behavior of Caldag lateritic nickel ore subjected to a sequential organic acid leaching method


KURŞUNOĞLU S., KAYA M.

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS, vol.22, no.11, pp.1131-1140, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 22 Issue: 11
  • Publication Date: 2015
  • Doi Number: 10.1007/s12613-015-1177-9
  • Title of Journal : INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
  • Page Numbers: pp.1131-1140

Abstract

The dissolution behavior of Caldag lateritic nickel ore subjected to a sequential organic acid leaching method was investigated. The effects of the type of organic acid, acid concentration, leaching time, and leaching temperature on the lateritic nickel ore were examined. Organic acids were used individually prior to sequential leaching. Citric acid was more effective than the other two acids for the selective leaching of nickel and cobalt. An increase in the citric acid concentration negligibly affected the dissolution of the metals, whereas temperature exhibited a strong beneficial effect. Oxalic acid was determined to be the most appropriate organic acid for the second leaching step. After 8 h (4 h + 4 h) of leaching with organic acids (0.5 M citric + 0.5 M oxalic) in sequence at 90A degrees C, 89.63% Ni, 82.89% Co, and 69.63% Fe were leached from the lateritic nickel ore. A sequential citric + oxalic acid leaching method could represent a viable alternative for the dissolution of metals from lateritic nickel ore.