Selective precipitation of mixed nickel–cobalt hydroxide

Harvey, Richard F.; Hannah, Robert; Vaughan, James

doi:10.1016/j.hydromet.2010.10.003

Cited by 47 publications

(19 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the extraction of nickel can be achieved at 30°C. These results are in agreement with the finding of Harvey et al, 2011.…”

Section: Effect Of Temperature On Extractionsupporting

confidence: 94%

“…Therefore, the extraction of nickel can be achieved at 30°C. These results are in agreement with the finding of Harvey et al, 2011. n the 0.75 ined ming lcium the lurry acid ction f the with and ith a peed hing MHP with then seen eved time on of s the cess. n the tant.…”

Section: Effect Of Temperature On Extractionsupporting

confidence: 92%

“…Further, sulphide or hydroxide precipitation is conducted to achieve manganese, calcium, magnesium separation from nickel and cobalt. Hydroxide precipitation; however, is less selective towards manganese (Harvey et al, 2011).…”

Section: Introductionmentioning

confidence: 96%

See 2 more Smart Citations

Extraction of Nickel From a Mixed Nickel-Cobalt Hydroxide Precipitate

Kurşunoğlu¹

2019

Bilimsel Madencilik Dergisi

View full text Add to dashboard Cite

ÖZThe 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. ABSTRACTKarışık bir nikel-kobalt hidroksit çökeleğinden (MHP) nikel kazanımı tasarlanmış ve deneysel olarak araştırılmıştır. Nikel kazanımı için sülfürik asit miktarının, liç süresinin, liç sıcaklığının ve karıştırma hızının etkileri incelenmiştir. 0,75M sülfürik asit miktarında, 30°C liç sıcaklığında ve 400 rpm karıştırma hızı şartlarında, 60 dakika liç işleminden sonra %90'dan daha fazla nikel ve yaklaşık %80 kobalt çözeltiye alınmıştır. Araştırılan koşullar altında katı-çözelti karışımının pH değeri 1,23 olarak belirlenmiştir. Liç sıcaklığının ve karıştırma hızının MHP numunesinden nikel kazanımına faydalı etkilerinin olmadığı gözlemlenmiştir. Yeni MHP numunesi üzerinde yapılan XRD incelemeleri sonrasında elde edilen sonuç ve piklerin oldukça geniş olması numunenin amorfumsu katı yapıda olduğunu ortaya çıkartmıştır.

show abstract

“…Therefore, the extraction of nickel can be achieved at 30°C. These results are in agreement with the finding of Harvey et al, 2011.…”

Section: Effect Of Temperature On Extractionsupporting

confidence: 94%

Section: Effect Of Temperature On Extractionsupporting

confidence: 92%

See 1 more Smart Citation

Extraction of Nickel From a Mixed Nickel-Cobalt Hydroxide Precipitate

Kurşunoğlu¹

2019

Bilimsel Madencilik Dergisi

View full text Add to dashboard Cite

show abstract

“…Both cobalt and nickel are solubilised during pressure acid leaching and while cobalt is more valuable than nickel, the nickel:cobalt ratio in laterites tends to be greater than 10:1 making cobalt the most valuable constituent in the ore after nickel. Once in solution, separating aqueous divalent nickel from cobalt is not straightforward as both ions display similar properties and readily precipitate together as sulphides (Roy, 1961) or hydroxides (Harvey et al, 2011) as a mixed nickel-cobalt intermediate product.…”

Section: Processing Of Nickel-cobalt Laterite Orementioning

confidence: 99%

Properties of Lewatit® TP272, a commercial solvent impregnated cation exchange resin for cobalt recovery

Vaughan

Dieters

et al. 2016

Minerals Engineering

Self Cite

View full text Add to dashboard Cite

“…Following impurity precipitation, nickel and cobalt are usually recovered from the aqueous solution together by either mixed sulfide precipitation, or mixed hydroxide precipitation. Mixed hydroxide precipitation is a relatively recent large scale industrial technology achieved by pH adjustment using a basic chemical such as magnesia, lime, limestone or sodium hydroxide [1]. The mixed hydroxide precipitate (MHP) consists of mostly nickel hydroxide but also contains valuable cobalt hydroxides and various other impurities, the main one being manganese.…”

Section: Introductionmentioning

confidence: 99%

Effect of key parameters on the selective acid leach of nickel from mixed nickel-cobalt hydroxide

Byrne¹,

Hawker²,

Vaughan³

2017

AIP Conference Proceedings

Self Cite

View full text Add to dashboard Cite

Abstract. Mixed nickel-cobalt hydroxide precipitate (MHP) is a relatively recent intermediate product in primary nickel production. The material is now being produced on a large scale (approximately 60,000 t/y Ni as MHP) at facilities in Australia (Ravensthorpe, First Quantum Minerals) and Papua New Guinea (Ramu, MCC/Highlands Pacific). The University of Queensland Hydrometallurgy research group developed a new processing technology to refine MHP based on a selective acid leach. This process provides a streamlined route to obtaining a high purity nickel product compared with conventional leaching / solvent extraction processes. The selective leaching of nickel from MHP involves stabilising manganese and cobalt into the solid phase using an oxidant. This paper describes a batch reactor study investigating the timing of acid and oxidant addition on the rate and extent of nickel, cobalt, manganese leached from industrial MHP. For the conditions studied, it is concluded that the simultaneous addition of acid and oxidant provide the best process outcomes.

show abstract

Selective precipitation of mixed nickel–cobalt hydroxide

Cited by 47 publications

References 9 publications

Extraction of Nickel From a Mixed Nickel-Cobalt Hydroxide Precipitate

Extraction of Nickel From a Mixed Nickel-Cobalt Hydroxide Precipitate

Properties of Lewatit® TP272, a commercial solvent impregnated cation exchange resin for cobalt recovery

Effect of key parameters on the selective acid leach of nickel from mixed nickel-cobalt hydroxide

Contact Info

Product

Resources

About