Sodium Thiosulfate and Natural Sulfur: Novel Potential Additives for Selective Reduction of Limonitic Laterite Ore

Pintowantoro, Sungging; Widyartha, Akhmad Berryl; Setiyorini, Yuli; Abdul, Fakhreza

doi:10.1007/s40831-021-00352-4

Cited by 16 publications

(5 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reduction process was performed shortly after the crucible was entered into a modified muffle furnace at a temperature of 700 o C for two hours and continuous at 1400 o C for six hours [1]. After cooling, reduced briquettes were firstly crushed and followed by a dry magnetic separation with 500 Gauss [2]. Porosity Calculation was calculated by Eq.…”

Section: Methodsmentioning

confidence: 99%

“…Data from the Geological Center in 2016 states that Indonesia has a nickel resource potential of 5.7 billion tons of nickel ore and source rock of around 79 million tons with an average nickel content of 1.20% -3.25%. Many Nickel reserve locations were found from 2011-2015, increasing Indonesia's Nickel reserves [2]. The high investment in the mining sector, particularly nickel, has increased nickel ore production, thereby growing nickel ore exports.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Briquetting Pressure Roles in Selective Reduction Process of Limonitic Nickel Laterite

Abdul

Rare

Setiyorini

et al. 2023

KEM

Self Cite

View full text Add to dashboard Cite

Direct reduction is one of the methods used in nickel extraction from limonitic nickel laterite. Briquettes become an essential part of the direct reduction. This research examines the appropriate com-paction pressure of briquettes to achieve the optimum concentration, recovery of Ni and Fe, and selectivity factors also analyze the com-pounds formed. The briquettes were made at a pressure of 20 Kgf/cm2, 30 Kgf/cm2, 40 Kgf/cm2, and 50 Kgf/cm2. This study was performed out by mixing the prepared materials and then compact-ing them to form briquettes. Then, it was put into a crucible, and the coal-limestone bed mixture is added and put into the muffle fur-nace. Then, the direct reduction was started by heating at 700°C for 2 hours and continued at 1400°C for 6 hours. Next, it was continued with magnetic separation and weighing of the reduction products. The products were tested with SEM-EDX to determine the content. The products were tested with XRD to determine the compounds formed. The optimal results were obtained at variations of 30 Kgf/cm2 with a Ni content of 5.00% and Recovery of 86.76%.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Briquetting Pressure Roles in Selective Reduction Process of Limonitic Nickel Laterite

Abdul

Rare

Setiyorini

et al. 2023

KEM

Self Cite

View full text Add to dashboard Cite

show abstract

“…12,21 The sulfur in the liquid phase also reduced its surface tension for the transformation of metal ions. 17,24 Suitable additives were strategic for the solid reductive roasting of laterite.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Reductive roasting was performed in the solid-state (1000–1200 °C), where fine ferronickel grains were aggregated with the aid of additives such as NaCl, CaSO 4 , Na 2 CO 4 , CaF 2 , S, Na 2 SO 4 , Na 2 S, and Na 2 S 2 O 3 . ,− Its energy consumption could be reduced by 44% compared with the RKEF process, while also achieving adaptability to various laterites. − During roasting, the highly active alkali metal ions reacted with silicate minerals to release nickel and cobalt by destroying their molecular structure . This process avoided the formation of high-melting silicates and reduced the resistance of solid reaction. , With the presence of sulfide, a partial metal oxide was sulfureted to form the low melting point liquid phase, promoting the migration of metal particles and restraining the reduction of iron and increasing the nickel and cobalt grades of the final product. , The sulfur in the liquid phase also reduced its surface tension for the transformation of metal ions. , Suitable additives were strategic for the solid reductive roasting of laterite.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Selective Reduction of Laterite for the Highly Efficient Enrichment of Ni and Co by NaFeS₂ and Its Recycling

Chen,

Xiao,

Rao

et al. 2024

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

The substantial demand for nickel and cobalt in the power battery industry presents an opportunity to convert powdery Ni−Co−Fe alloys, derived from laterite ores via solid-state reduction followed by magnetic separation, into battery-grade nickel and cobalt feedstock. To enhance the carbothermic solid-state reduction of laterite ores for the coenrichment of Ni and Co, NaFeS 2 was synthesized and applied as the additive to achieve the selective reduction of Ni and Co oxides over Fe oxides and to reject the majority of iron oxides and gangues into the tailings via magnetic separation. A powdery Ni−Co−Fe alloy with Ni and Co grades of 13.74 and 1.19%, respectively, and the corresponding recoveries of 93.41 and 81.93% was obtained. The addition of NaFeS 2 accelerated the growth of alloy particles by promoting the formation of the micro-zone liquid phase. Potential pollution problems caused by Na and S elements in tailings can be addressed through hydrothermal treatment of tailings, and also allows for the recycling of NaFeS 2 .

show abstract

“…The contents of silicon dioxide and magnesium oxide in the ore are high, therefore it is considered as the typical garnierite. As discussed in the literature, reduction-roasting magnetic separation process, used for various types of laterite nickel ore has the advantages of short process, friendly environment and no pollution [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Migration and Aggregation Behavior of Nickel and Iron in Low Grade Laterite Ore with New Additives

Wang

Nie

et al. 2021

Metals

View full text Add to dashboard Cite

This study focused on the preparation of high-grade ferronickel concentrate, the behavior of efficient migration and the polymerization of ferronickel particles during reduction roasting, by adding calcium fluoride and a ferronickel concentrate to low-grade laterite ore from Yunnan. The effects of temperature, holding time, reductant content, ferronickel concentrate content and magnetic field intensity on the preparation of the ferronickel concentrate were studied and the optimum conditions were determined as follows: 30% ferronickel concentrate (metal Ni-4.68%, metal Fe-45.0%), 8% coal, 7% calcium fluoride, reduction temperature of 1250 °C, reduction time of 60 min and the intensity of magnetic separation is 150 mT. The proportion of nickel and iron in ferronickel concentrate was 88.7% (metal Ni-8.62%, metal Fe-80.1%), and the recovery efficiency of nickel and iron are 98.8% and 82.4%, respectively. X-ray diffraction and scanning electron microscopy indicated that ferronickel-concentrate, as an activating agent, improved the aggregation effect of ferronickel particles. The efficient migration and polymerization of ferronickel particles in the ore significantly increased the size of the ferronickel particles with additives, therefore a high-grade ferronickel concentrate was prepared, and the reduction and recovery efficiency of laterite nickel ore was improved.

show abstract

Sodium Thiosulfate and Natural Sulfur: Novel Potential Additives for Selective Reduction of Limonitic Laterite Ore

Cited by 16 publications

References 30 publications

Briquetting Pressure Roles in Selective Reduction Process of Limonitic Nickel Laterite

Briquetting Pressure Roles in Selective Reduction Process of Limonitic Nickel Laterite

Enhanced Selective Reduction of Laterite for the Highly Efficient Enrichment of Ni and Co by NaFeS₂ and Its Recycling

Migration and Aggregation Behavior of Nickel and Iron in Low Grade Laterite Ore with New Additives

Contact Info

Product

Resources

About

Sodium Thiosulfate and Natural Sulfur: Novel Potential Additives for Selective Reduction of Limonitic Laterite Ore

Cited by 16 publications

References 30 publications

Briquetting Pressure Roles in Selective Reduction Process of Limonitic Nickel Laterite

Briquetting Pressure Roles in Selective Reduction Process of Limonitic Nickel Laterite

Enhanced Selective Reduction of Laterite for the Highly Efficient Enrichment of Ni and Co by NaFeS2 and Its Recycling

Migration and Aggregation Behavior of Nickel and Iron in Low Grade Laterite Ore with New Additives

Contact Info

Product

Resources

About

Enhanced Selective Reduction of Laterite for the Highly Efficient Enrichment of Ni and Co by NaFeS₂ and Its Recycling