Selective recovery of chromium from ferronickel slag via alkaline roasting followed by water leaching

Gu, Foquan; Zhang, Yuanbo; Peng, Zhiwei; Su, Zijian; Tang, Huarong; Tian, Weiguang; Liang, Guoshen; Rao, Mingjun; Li, Guanghui; Jiang, Tao

doi:10.1016/j.jhazmat.2019.04.002

Cited by 49 publications

(27 citation statements)

References 51 publications

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“…The pyro-hydrometallurgical process with the alkali roasting method is followed by leaching using water. The optimum percent extraction yield of 92.33 % under conditions of a roasting temperature of 600 °C for one hour, followed by washing water under conditions of research temperature at 50 °C for one hour at a ratio of 10 ml/g of liquid-solid [5].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Reverse leaching of magnesium from ferronickel slag using alkali solvent NaOH

Prasetyo

Darmawansyah

Mayangsari

et al. 2020

EEJET

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Проведено дослiдження з вилучення магнiю з феронiкелевого шлаку, обробленого зворотним вилуговуванням розчинами гiдроксиду натрiю (NaOH). Феронiкелевий шлак в основному складається з силiкату магнiю i силiкату залiза. Першим етапом дослiдження була пiдготовка феронiкелевого шлаку до подрiбнення за допомогою кульового млина до розмiру-200 меш. По-друге, прожарювання феронiкелевих шлакiв для видалення кристалiчної води i збiльшення пористостi для полегшення процесу вилуговування. Наступним кроком було зворотне вилуговування з використанням гiдроксиду натрiю (NaOH) для розчинення кремнезему. При розчиненнi кремнезему очiкувалося збiльшення вмiсту в залишку таких елементiв, як магнiй i залiзо. Змiнними в даному дослiдженнi з вилуговування феронiкелевого шлаку були час вилуговування, концентрацiя розчинника i температура вилуговування. Зворотне вилуговування феронiкелевого шлаку проводили зi змiною часу вiд 15 до 240 хвилин, температурою 30 °С, 70 °С i 100 °С, концентрацiями NaOH 9 М, 10 М i 11 М. Для вивчення вихiдних характеристик феронiкелевого шлаку i результатiв процесу вилуговування використовували рентгеноструктурний аналiз, рентгенофлуоресцентний аналiз i мас-спектрометрiю з iндуктивно-зв'язаною плазмою. Результати визначення характеристик зразкiв феронiкелевого шлаку методом рентгеноструктурного аналiзу показують, що в складi домiнуючих з'єднань присутнi форстерит (Mg 2 SiO 4), енстатiт (MgSiO 3) i фаялiт (Fe 2 SiO 4). Крiм того, результати також пiдтверджуються рентгенофлуоресцентним аналiзом i растровою електронною мiкроскопiєю. Кiлькiсний РФА аналiз показує, що феронiкелевий шлак мiстить 45,69 % SiO 2 , 29,32 % MgO i 16,5 % Fe 2 O 3. Результати растрової електронної мiкроскопiї показують, що Mg, Si, Fe i O зв'язуються разом, що вказує на присутнiсть силiкату магнiю i силiкату залiза. Найбiльший вiдсоток вилучення магнiю становить 73,10 % в умовах експериментальної температури 100 °С протягом 240 хвилин, концентрацiї розчинника 10 М i швидкостi перемiшування 300 об/хв. Збiльшення вiдсотка вилучення магнiю обумовлено розчиненням кремнезему в процесi вилуговування. Розчинення кремнезему пiдтверджується наявнiстю гiдроксиду магнiю i гiдроксиду залiза (II) в залишку, що показано рентгеноструктурним аналiзом. Це призвело до значного збiльшення вмiсту MgO в залишку до 42,8 %, як показав рентгенофлуоресцентний аналiз. Крiм того, растрова електронна мiкроскопiя показує, що Mg i O зв'язуються разом, що вказує на присутнiсть MgO. Також можна визначити, що MgO є домiнуючим Ключовi слова: феронiкель, шлак, форстерит, магнiй, кремнезем, вилуговування, зворотне вилуговування, гiдроксид натрiю, фiльтрат, залишок ,% вилучення

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The ferronickel slag is a byproduct of the smelting of nickel ores categorized as hazardous and poisonous to the environment [4]. The current use of ferronickel slag is only as construction material and most of its remaining slags are only piled around its environment [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Reverse leaching of magnesium from ferronickel slag using alkali solvent NaOH

Prasetyo

Darmawansyah

Mayangsari

et al. 2020

EEJET

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“…However, a few studies [1,4,[22][23][24][25] were focused on the metals' separation and recovery from steel slags, and several findings are summarized early [4]. In this context, the main objective of this work is to know EAF slag characteristics in order to facilitate recovering of the steel slag bearing SMs using an appropriate technology and their utilization for both eco-compatible and cost-effective uses.…”

Section: Introductionmentioning

confidence: 99%

New EAF Slag Characterization Methodology for Strategic Metal Recovery

et al. 2021

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The grown demand of current and future development of new technologies for high added value and strategic metals, such as molybdenum, vanadium, and chromium, and facing to the depletion of basic primary resources of these metals, the metal extraction and recovery from industrial by-products and wastes is a promising choice. Slag from the steelmaking sector contains a significant amount of metals; therefore, it must be considered to be an abundant secondary resource for several strategic materials, especially chromium. In this work, the generated slag from electric arc furnace (EAF) provided by the French steel industry was characterized by using multitude analytical techniques in order to determine the physico-chemical characteristics of the targeted slag. The revealed main crystallized phases are larnite (Ca2SiO4), magnetite (Fe3O4), srebrodolskite (Ca2Fe2O5), wüstite (FeO), maghemite (Fe2.6O3), hematite (Fe2O3), chromite [(Fe,Mg)Cr2O4], and quartz (SiO2). The collected slag sample contains about 34.1% iron (48.5% Fe2O3) and 3.5% chromium, whilst the vanadium contents is around 1500 ppm. The Mössbauer spectroscopy suggested that the non-magnetic fraction represents 42 wt% of the slag, while the remainder (58 wt%) is composed of magnetic components. The thermal treatment of steel slag up to 900 °C indicated that this solid is almost stable and few contained phases change their structures.

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“…Prior research studies to increase the value of the ferronickel slag have been carried out using pyrometallurgy process [12][13][14] hydrometallurgy process [15,16] as well as combination of both processes [17][18][19]. Generally, flotation process is a commercially pre-tratment that carried out prior pyrometallurgy or hydrometallurgy process to separate or upgrade the specific element.…”

Section: Introductionmentioning

confidence: 99%

“…Sodium silicate formation was also obtained from reduction of ferronickel slag using NaOH [13] and Na2SO4 [14] as additives. However, utilization of NaOH to form sodium silicate needs high quantity [18,23] and leads to high base condition which can affect the further treatments. Hydrometallurgy process by leaching to the ferronickel slag using NaOH solution can produce silicon leached solution.…”

Section: Introductionmentioning

confidence: 99%

Magnesium extraction of ferronickel slag processed by alkali fusion and hydrochloric acid leaching

Prasetyo

Khaerul

Mayangsari

et al. 2021

J min metall B Metall

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A research using ferronickel slag, the by-product of ferronickel production, as raw material for magnesium extraction has been carried out. It is essential to upgrade the value of ferronickel slag instead of used directly for reclamation materials. Moreover, accumulation due to increasing ferronickel demand as well as environmental contamination due to various potencially toxic elements contained in the ferronickel slag could be prevented. The general objective of this study is to utilize the ferronickel slag for magnesium materials. The specific objective is to determine the optimum conditions of magnesium extraction in the process of alkali fusion followed by hydrochloric acid leaching. A novel method for magnesium extraction from ferronickel slag was carried out through reducing silica content followed by acid leaching method. Alkali fusion of the mixture of ferronickel slag and Na2CO3 at 1000 ?C for 60 minutes followed by water leaching at 100 ?C for 60 minutes with solid to liquid percentage of 20 % were carried out to separate the silica. The leaching residue resulted from water leaching was then leached using hydrochloric aid solution to extract magnesium. The leaching temperature and time as well as the hycrochloric acid concentration were varied in the acid leaching process. Alkali fusion process proved can be generated the sodium silicate that can be separated in the water leaching to the leached solution. Meanwhile, the leaching residue was leached using hydrochloric acid to extract the magnesium. The highest magnesium extraction percentage is 82.67% that resulted from an optimum acid leaching condition with temperature of 80 ?C for 30 minutes using 2M HCl solution. Based on the kinetics study, the activation energy (Ea) for the leaching reaction of magnesium at atmospheric pressure between 32?C to 80?C is 9.44 kJ/mol and affected by diffusion and chemical reactions.

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Selective recovery of chromium from ferronickel slag via alkaline roasting followed by water leaching

Cited by 49 publications

References 51 publications

Reverse leaching of magnesium from ferronickel slag using alkali solvent NaOH

Reverse leaching of magnesium from ferronickel slag using alkali solvent NaOH

New EAF Slag Characterization Methodology for Strategic Metal Recovery

Magnesium extraction of ferronickel slag processed by alkali fusion and hydrochloric acid leaching

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