EXTRACTION OF NICKEL FROM A MIXED NICKEL-COBALT HYDROXIDE PRECIPITATE

Year 2019, Volume: 58 Issue: 1, 45 - 52, 01.03.2019

Sait Kurşunoglu

https://doi.org/10.30797/madencilik.537644

Cited By: 3

Abstract

The extraction of nickel from a mixed nickel-cobalt hydroxide precipitate (MHP) was conceived

and experimentally explored. The effect of sulphuric acid concentration, leaching time, leaching

temperature and stirring speed on nickel extraction was investigated. After 60 min leaching time,

more than 90% of nickel and approximately 80% of cobalt were taken into the leach solution

under the following conditions: 0.75M sulphuric acid concentration, 30°C leaching temperature

and 400 rpm stirring speed. pH of the leach slurry was determined as 1.23 under the conditions

explored. It was observed that there is no beneficial effect of leaching temperature and stirring

speed on the extraction of nickel from the MHP sample. The XRD pattern of the fresh MHP

sample revealed the data and peak of the sample widening which is indicative of amorphous

solid structure.

Keywords

Nickelextraction, Mixed nickelcobalt hydroxide precipitate, Sulphuricacid, Amorphous solid structure

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