Effect of modified basicity in selective reduction process of limonitic nickel ore

Basicity is an important parameter in the smelting of nickel laterite to obtain low-temperature melting point and low-liquidus slag viscosity, resulting in less energy consumption and a more effective smelting process ferronickel production. Nevertheless, it is still less studied in selective reduct...

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Autores principales:	Fajar Nurjaman, Anton Sapto Handoko, Fathan Bahfie, Widi Astuti, Bambang Suharno
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Basicity Selective reduction Limonitic nickel ore Ferronickel Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/41cc5bb9e2c541c0aa7909ba8712f222
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spelling	oai:doaj.org-article:41cc5bb9e2c541c0aa7909ba8712f2222021-12-04T04:34:26ZEffect of modified basicity in selective reduction process of limonitic nickel ore2238-785410.1016/j.jmrt.2021.11.052https://doaj.org/article/41cc5bb9e2c541c0aa7909ba8712f2222021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2238785421013314https://doaj.org/toc/2238-7854Basicity is an important parameter in the smelting of nickel laterite to obtain low-temperature melting point and low-liquidus slag viscosity, resulting in less energy consumption and a more effective smelting process ferronickel production. Nevertheless, it is still less studied in selective reduction of nickel laterite. In this work, the effect of binary, ternary, and quaternary basicity limonitic nickel ore had been investigated clearly to reveal the appropriate basicity in the selective reduction process. The basicity was modified with the addition of CaO, MgO, SiO2, and Al2O3 in nickel laterite. The reduction process was conducted in a muffle furnace at 1150 °C for 60 min. It was continued with the magnetic separation process to separate concentrate and tailing. The appropriate basicity type in selective reduction of limonitic ore was 0.3 of ternary basicity (BT1) and 0.2 of quaternary basicity (BQ1), which had a similar nickel grade and recovery, i.e., 6.08% and 88.33%, respectively. At low basicity, the addition of CaO and SiO2 could suppress the metallization of iron through troilite and fayalite formation, respectively. Nevertheless, more CaO addition at high basicity could inhibit the ferronickel agglomeration due to the formation of high melting point structures, i.e., melilite. Modifying basicity with the addition of MgO and Al2O3 resulted in a negative effect in selective reduction due to the formation of a complex structure of forsterite and magnesioferrite (with an aluminum substitute), which was more difficult to reduce than magnetite.Fajar NurjamanAnton Sapto HandokoFathan BahfieWidi AstutiBambang SuharnoElsevierarticleBasicitySelective reductionLimonitic nickel oreFerronickelMining engineering. MetallurgyTN1-997ENJournal of Materials Research and Technology, Vol 15, Iss , Pp 6476-6490 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Basicity Selective reduction Limonitic nickel ore Ferronickel Mining engineering. Metallurgy TN1-997
spellingShingle	Basicity Selective reduction Limonitic nickel ore Ferronickel Mining engineering. Metallurgy TN1-997 Fajar Nurjaman Anton Sapto Handoko Fathan Bahfie Widi Astuti Bambang Suharno Effect of modified basicity in selective reduction process of limonitic nickel ore
description	Basicity is an important parameter in the smelting of nickel laterite to obtain low-temperature melting point and low-liquidus slag viscosity, resulting in less energy consumption and a more effective smelting process ferronickel production. Nevertheless, it is still less studied in selective reduction of nickel laterite. In this work, the effect of binary, ternary, and quaternary basicity limonitic nickel ore had been investigated clearly to reveal the appropriate basicity in the selective reduction process. The basicity was modified with the addition of CaO, MgO, SiO2, and Al2O3 in nickel laterite. The reduction process was conducted in a muffle furnace at 1150 °C for 60 min. It was continued with the magnetic separation process to separate concentrate and tailing. The appropriate basicity type in selective reduction of limonitic ore was 0.3 of ternary basicity (BT1) and 0.2 of quaternary basicity (BQ1), which had a similar nickel grade and recovery, i.e., 6.08% and 88.33%, respectively. At low basicity, the addition of CaO and SiO2 could suppress the metallization of iron through troilite and fayalite formation, respectively. Nevertheless, more CaO addition at high basicity could inhibit the ferronickel agglomeration due to the formation of high melting point structures, i.e., melilite. Modifying basicity with the addition of MgO and Al2O3 resulted in a negative effect in selective reduction due to the formation of a complex structure of forsterite and magnesioferrite (with an aluminum substitute), which was more difficult to reduce than magnetite.
format	article
author	Fajar Nurjaman Anton Sapto Handoko Fathan Bahfie Widi Astuti Bambang Suharno
author_facet	Fajar Nurjaman Anton Sapto Handoko Fathan Bahfie Widi Astuti Bambang Suharno
author_sort	Fajar Nurjaman
title	Effect of modified basicity in selective reduction process of limonitic nickel ore
title_short	Effect of modified basicity in selective reduction process of limonitic nickel ore
title_full	Effect of modified basicity in selective reduction process of limonitic nickel ore
title_fullStr	Effect of modified basicity in selective reduction process of limonitic nickel ore
title_full_unstemmed	Effect of modified basicity in selective reduction process of limonitic nickel ore
title_sort	effect of modified basicity in selective reduction process of limonitic nickel ore
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/41cc5bb9e2c541c0aa7909ba8712f222
work_keys_str_mv	AT fajarnurjaman effectofmodifiedbasicityinselectivereductionprocessoflimoniticnickelore AT antonsaptohandoko effectofmodifiedbasicityinselectivereductionprocessoflimoniticnickelore AT fathanbahfie effectofmodifiedbasicityinselectivereductionprocessoflimoniticnickelore AT widiastuti effectofmodifiedbasicityinselectivereductionprocessoflimoniticnickelore AT bambangsuharno effectofmodifiedbasicityinselectivereductionprocessoflimoniticnickelore
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Effect of modified basicity in selective reduction process of limonitic nickel ore

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