Researches on recycling of iron tailings in different fields have been studied over the years, such as using iron tailings to prepare concrete [6], iron tailings as cemented paste backfill for underground stopes [7, 8], recovering rare earth elements minerals [9], development a ceramic colorant for glazes [10], recovering TiO 2 [11], and as the ...

About 61% natural ilmenite recovery was observed in the flotation concentrate of a Humphrey Spiral concentrate while a 62% recovery of hematite was found in the flotation tailings.

In response to this challenge, several metallurgical technologies have been developed to recover Fe from LTLNO for high-value utilization [15], [16], [17].For example, Bai et al. proposed a mineral phase transformation technology to convert hematite into strongly magnetic magnetite with the iron grade and recovery of 52.00 % and 80.11 %, respectively [18].

and recover > 65 % iron bearing particles from the tailings. More importantly, the corresponding tail contained ~45% Fe. It was concluded that this novel process may be effectively used to recover iron values from low-grade hematite tailings. Key Words: Iron ore slime, Fe Recovery, HGMS,Yield & Noamundi 1. INTRODUCTION

The raw material (RM) used in this study was the roasted lead-zinc tailings, which was the cinder obtained from the oxidation roasting of the lead-zinc tailings in the Fankou lead and zinc mine (Lei et al., 2015).The main mineral in the RM is hematite, which was generated from the oxidation of pyrite in the lead-zinc tailings.

E. Darezereshki, A.K. Darban, M. Abdollahy, Synthesis of magnetite nanoparticles from iron ore tailings using a novel reduction-precipitation method, J. Alloys Compd., 749, …

The acid-leaching tailings of laterite nickel ore are a hazardous waste generated by the laterite nickel ore industry [1], [2], [3]. As global demand for nickel continues to rise and nickel sulfide resources decrease, the extraction of nickel resources from laterite nickel ores the main development trend of the global nickel industry in the coming years [4].

Recovery of iron from hazardous tailings using fluidized roasting coupling technology. Author links open overlay panel Zhidong Tang a b c, Peng Gao a b, Yanjun Li a b, ... The total iron content reached 10.60%, and the chief ferrous minerals in the tailings were hematite (Fe 2 O 3), magnetite (Fe 3 O 4) and carbonate (FeCO 3). (2)

1. Introduction. In the Sudbury area, up to 100 millions metric tonnes of pyrrhotite (Fe 1-x S) tailings have been disposed, with an estimated average grade around ~0.8 wt% Ni (Peek et al., 2011).Considering the constant remediation required to prevent acid mine drainage caused by pyrrhotite oxidation, the potential for recovering the Ni value has been considered …

During the processing of iron ores, a large quantity of low-grade tailings containing abundant iron values in fine particle size range is produced. A novel HGMS-Centrifuge process is proposed …

This study aimed to recover high-purity silica from hematite tailings (HTs) using superconducting high-gradient magnetic separation (S-HGMS) technology. This process involved converting silica into a silicone-rich concentrate and subsequently employing a fluorine-free mixed acid to leach the silicon-rich concentrate to remove impurities and ...

Rare earth (RE) and iron minerals in tailings exhibit fine embedded granularity and are closely associated with silicates, carbonates, and other lode minerals, which are difficult to be recycled. Studies of these tailings led to some new processes of ore dressing, involving grinding, RE flotation, strong magnetic separation, and positive iron flotation. In this closed circuit process, …

The research is aimed at study of the probable recovery of iron from the tailings of the Olcon mining company located in the north-western Arctic zone of Russia. Material composition of a sample from a tailings dump was analysed. The authors have developed a separation production technology to recover magnetite-hematite concentrate from the ...

The rapid depletion of high-grade rare earth elements (REE) resources implies that future supplies may be augmented with low-grade ores, tailings, and other unconventional resources to meet cut-off grades and, subsequently, supply demands. This paper presents an amalgamation of studies conducted on selected complex low-grade iron-oxide-silicate-rich …

The study aimed to evaluate the separation performance of a full-scale continuous centrifugal concentrator in the reconcentration of fine hematite from high-gradient magnetic …

Material composition of a sample from a tailings dump was analysed. The authors have developed a separation production technology to recover magnetite-hematite concentrate from …

A pilotscale experiment of the recovery iron ore tailings from Jiuquan Iron and Steel Corporation ... CO and H2 generated from biomass reduced the hematite in tailings particles from interior to ...

During the magnetization roasting, CO and H 2 generated from biomass reduced the hematite in tailings particles from interior to exterior, forming a loose structure with rich microfissures, facilitating the subsequent separation operations. This study offers a novel reference for applying biomass to exploit hematite minerals and shows the ...

Recovery of magnetite-hematite concentrate from iron ore ... concentrate with total iron content of 65.9% and recovers 91.0% of magnetite and 80.5% of hematite from the tailings containing 20.4% ...

It was also shown that hematite concentrate can be recovered from stockpiled tailings using the separation technology based on the use of spiral separation. The gravity …

The research is aimed at study of the probable recovery of iron from the tailings of the Olcon mining company located in the north-western Arctic zone of Russia. Material composition of a sample from a tailings dump was analysed. The authors have developed a separation production technology to recover magnetite-hematite concentrate from the ...

Several studies have utilized bioleaching techniques to extract REE from MTs. Reynier et al. [132] investigated the recovery of REEs from tailings collected at restored uranium mine sites in Ontario, Canada. They bioleached the tailings using a combination of native sulfur- and iron-oxidizing bacteria to solubilize the REEs, uranium, and thorium.

The research is aimed at study of the probable recovery of iron from the tailings of the Olcon mining company located in the north-western Arctic zone of Russia. Material composition of a sample from a tailings dump was analysed. The authors have developed a separation production technology to recover magnetite-hematite concentrate from the tailings. A processing flowsheet …

The iron tailings were obtained from a tailings pond in Dabaoshan, Guangdong, and the iron phase composition of raw ore was analysed, as shown in Table S2. The particle size composition of the iron tailings is shown in Table S3, and the main phase components were the haematite and limonite phases (including α-FeOOH and γ-FeOOH). The total ...

This study aimed to recover high-purity silica from hematite tailings (HTs) using superconducting high-gradient magnetic separation (S-HGMS) technology. This process involved converting silica into a silicone-rich concentrate and subsequently employing a fluorine-free mixed acid to leach the silicon-rich concentrate to remove impurities and ...

Iron ore tailings (IOTs) are a form of solid waste produced during the beneficiation process of iron ore concentrate. In this paper, iron recovery from IOTs was studied at different points during a process involving pre-concentration followed by direct reduction and magnetic separation. Then, slag-tailing concrete composite admixtures were prepared from high-silica …

Numerous pilot-scale tests using SMR have been conducted to recover iron from several typical refractory iron ores such as Hannan Mine iron ore, Donganshan iron ore, Ansteel tailings and Wufeng oolitic hematite in China, and have achieved some unprecedented results [5, 23, 25, 26]. For example, an iron concentrate containing 65.69% Fe with an ...

This work describes, at the molecular level, the differences in adsorption between etheramine and amidoamine N-[3-(dimethylamino)propyl]dodecanamide, explaining the behavior of this amidoamine, which allows its use, without a depressant, for the

The process presented an overall iron recovery around 84%. The resulting material could be used as a commercial pigment or be incorporated into steel-making iron pellets. ... This tailings, present quartz, hematite, goethite and kaolinite as the main mineralogical components (Carmignano et al., 2021). Indeed, IOT are associated with ...

The proposed technology allows recovering hematite concentrate with a hematite iron content of 54.5% and recovery of 75.4% from current tailings containing 5.2% of hematite iron.