Dissolution behaviour of a Turkish lateritic nickel ore

Girgin, İsmail; Obut, Abdullah; Üçyıldız, Ayşe

doi:10.1016/j.mineng.2010.10.009

Cited by 42 publications

(15 citation statements)

References 28 publications

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“…The most superficial layer and the base of the deposits have the lowest nickel contents (<0.8%), the first layer is mainly composed by hematite and the second one, the deposit base, corresponds to the rock weathering. The zones of limonites and saprolites and their transition are the ones which show greater potential for the nickel extraction due to their metallic content, lower than 1.5% of Ni, for limonites and higher to 1.5% in saprolites (Girgin et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…Countries like New Caledonia, Japan, Russia, USA, Brazil, Greece, Cuba, Indonesia, Phillipines, Dominican Republic, Australia, Guatemala, Co lombia, Yugoslavia, Venezuela and China have operations for the nickel extraction through pyrometallurgical route and hydrometallurgical route based on laterites of nickel (Dalvi et al, 2004). Laterites are the result of the land degradation promoted by climate changes and humidity exposition, among other geological factors (Rodríguez et al, 2009), in general the nickel content increases as increases the depth of deposit (Girgin et al, 2011). They can be classified in limonites or saprolites, based on the iron and magnesium ( Li, 1999;Dalvi et al, 2004;Oxley and Barcza, 2013) content and they are treated in a different ways, either by pyrometallurgical or hydrometallurgical processes.…”

Section: Introductionmentioning

confidence: 99%

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Thermodynamic analysis of the reduction process of Colombian lateritic nickel ore

et al. 2015

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ABSTRACT:The Colombian nickeliferous laterites are minerals used for the nickel extraction by hydrometallurgical and pyrometallurgical processes. In this work the thermodynamic behaviour of three Colombian lateritic mineral samples are described, with contents of 1.42%, 1.78% y 2.04% of nickel, when they are subjected to the calcination and reduction processes. The mineral was characterized using X Rays Diffraction and X Rays Fluorescence, giving evidence of the presence of mineralogical species such as nepouite (Ni 3 Si 2 O 5 (OH) 4 ), goethite (Fe 2 O 3 .H 2 O), silica (SiO 2 ), antigorite (Mg 3 Si 2 O 5 (OH) 4 ) and fosferite (Mg 2 SiO 4 ). The thermodynamic analysis was conducted using the software HSC Chemistry for Windows 5.1 and was focused in the quantitative determination of the chemical evolution of the mixture of these minerals with variable quantities of coal, in function of temperature. The results produced by the program showed, in the equilibrium, the feasibility of complete reduction of the nickel, and additionally, a considerable high percentage of reduction of iron oxides (up to 99%) using ratio C/O ≈1 at temperatures close to 1100 °C. RESUMEN: Análisis termodinámico del proceso de reducción de minerales lateríticos de níquel colombianos.Las lateritas niquelíferas colombianas son minerales utilizados para la extracción de níquel mediante procesos hidrometalúrgicos y pirometalúrgicos. En este trabajo se describe el comportamiento termodinámico de tres muestras de mineral laterítico colombiano, con contenidos de 1,42; 1,78 y 2,04% de níquel, respectivamente, cuando se someten a los procesos de calcinación y reducción. El mineral se caracterizó utilizando difracción de rayos X y fluorescencia de rayos X, poniendo de manifiesto la presencia de especies mineralógicas tales como nepouita (Ni 3 Si 2 O 5 (OH) 4 ), goethita (Fe 2 O 3 .H 2 O), sílice (SiO 2 ), antigorita (Mg 3 Si 2 O 5 (OH) 4 ) y fosferita (Mg 2 SiO 4 ). El aná-lisis termodinámico se realizó utilizando el software HSC Chemistry for Windows 5.1, y el estudio se centró en la determinación cuantitativa de la evolución química de mezclas de estos minerales con cantidades variables de carbón en función de la temperatura. Los resultados obtenidos con el programa muestran, en el equilibrio, la posibilidad de reducción completa del níquel y un elevado porcentaje de reducción de los óxidos de hierro (hasta 99%) empleando relaciones C/O ≈1 a temperaturas cercanas a los 1100 °C.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermodynamic analysis of the reduction process of Colombian lateritic nickel ore

et al. 2015

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“…Nilai D e dihitung dengan persamaan: (12) dengan m adalah nilai gradien garis lurus yang dibentuk dari pengaluran…”

Section: B Penentuan Energi Aktivasi Pelindianunclassified

Studi Kinetika Pelindian Bijih Nikel Limonit Dari Pulau Halmahera Dalam Larutan Asam Nitrat [Kinetics Study of Nickel Limonite Ore Leaching from Halmahera Island in Nitric Acid Solution]

Mubarok¹,

Fathoni²

2016

metal.

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IntisariSalah satu perkembangan terkini proses ekstraksi nikel dari bijih laterit dengan jalur hidrometalurgi adalah dengan menggunakan reagen pelindi yang dapat diregenerasi, seperti asam klorida dan asam nitrat. Meskipun keberhasilan proses pelindian bijih nikel laterit dalam asam nitrat telah dilaporkan, studi kinetika pelindian bijih nikel laterit dalam asam nitrat sedikit dipublikasikan. Dalam paper ini dipresentasikan hasil analisis kinetika pelindian bijih nikel laterit tipe limonit dari Pulau Halmahera dalam larutan asam nitrat pada tekanan atmosfer. Studi kinetika pelindian bertujuan untuk mengetahui pengendali laju reaksi, parameter kinetika (konstanta laju reaksi atau koefisien difusi), energi aktivasi reaksi dan persamaan kinetikanya. Kinetika pelindian dipelajari dengan menggunakan model shrinking core (SCM). Hasil analisis menunjukkan bahwa pengendali laju reaksi pada pelindian bijih limonit dari Pulau Halmahera dalam larutan asam nitrat adalah difusi melalui lapisan produk padat dengan koefisien difusi efektif (D e ) sebesar 2,1-8,55 x 10 -10 m 2 /s pada rentang suhu 65-95 °C serta energi aktivasi sebesar 46,78 kJ/mol.

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“…World nickel reserves comprise of sulfide and lateritic types of ores. While lateritic types of reserves comprise of 73% world's nickel resources, sulphide ores are preferred for nickel production [2]. Because of deperdition of sulfide reserves and in respect of traditional pyrometallurgical methods, production of nickel costs increase, laterite becomes available source [3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sodium Sulfate Addition on the Production of Ferronickel from Lateritic Ore

Parlak

Yıldız

2016

Acta Phys. Pol. A

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Lateritic nickel ore from Manisa -Çaldağ region was roasted to form ferronickel at 1200• C for 1 h with additions of metallurgical coke and sodium sulfate varying by weight 5-15% and 0-20%, respectively. Formed metallic part of roasted sample was separated from non-metallic part by magnet and examined by means of X-ray diffraction analysis and scanning electron microscopy. In spite of kamacite α-(Fe,Ni) formation, iron-rich silicate structure that causes iron losses was observed for samples roasted with only coke. Kamacite formation increased with increment of the coke percentage but iron-rich silicate structure remained almost same. With addition of sodium sulfate, elimination of iron-rich silicate phase was achieved and easily magnetizable metallic particles were obtained.

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Dissolution behaviour of a Turkish lateritic nickel ore

Cited by 42 publications

References 28 publications

Thermodynamic analysis of the reduction process of Colombian lateritic nickel ore

Thermodynamic analysis of the reduction process of Colombian lateritic nickel ore

Studi Kinetika Pelindian Bijih Nikel Limonit Dari Pulau Halmahera Dalam Larutan Asam Nitrat [Kinetics Study of Nickel Limonite Ore Leaching from Halmahera Island in Nitric Acid Solution]

Effect of Sodium Sulfate Addition on the Production of Ferronickel from Lateritic Ore

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