Recycling of iron from red mud by magnetic separation after co-roasting
A recycling process of iron from red mud by magnetic separation is proposed, in which iron oxide (Fe 2 O 3) in red mud transforms to magnetite (Fe 3 O 4) by anaerobic co-roasting with pyrite (FeS 2).TG-DTA and XRD results showed that hematite was reduced to magnetite by the thermo-decomposed compounds (iron monosulfide, …
Flotation separation of pyrite and chalcopyrite with …
The separation of chalcopyrite and pyite is not fully solved, and thus more efficient depressants are still needed in industry. This paper used potassium permanganate (KMnO 4) as a pyrite depressant to separate pyrite from chalcopyrite.Flotation and contact angle results indicated that pyrite could be depressed by KMnO 4 at pH 7, while KMnO …
Preparation of Metallic Iron Powder from Pyrite Cinder by
The reduction and magnetic separation procedure of pyrite cinder in the presence of a borax additive was performed for the preparation of reduced powder. The effects of borax dosage, reduction temperature, reduction time and grinding fineness were investigated. The results show that when pyrite cinder briquettes with 5% borax were …
Recovery of valuable elements from pyrite pyrolysis
The pyrolysis slag used in this study comes from Hunan, China, which is a solid product obtained by pyrolysis of sulfide concentrates. The main chemical components are shown in Table 1, and the XRD spectrum of the sample is shown in Fig. 1.As seen from Table 1 and Fig. 1, pyrrhotite (Fe 7 S 8) is the main iron-containing phase.The iron …
Selective separation of chalcopyrite and pyrite using a novel …
However, there are still many difficulties in separation of chalcopyrite and pyrite, because the copper ion has an activation effect on pyrite, while the iron ion has depression effect on chalcopyrite, which leads to poor separation of chalcopyrite and pyrite (Khoso et al., 2020). At present, separation of chalcopyrite and pyrite is mainly by a ...
Preparation and recovery of iron carbide from pyrite cinder …
of iron from pyrite cinder in magnetic separation, beca use the sa turat ion magn etiza tion of F e 3 O 4 (92e mu/g) is m uch lower than that of Fe 3 C
(PDF) Recovery of iron from waste slag of pyrite processing …
Zhang et al. [127] attempted to recover iron from the waste slag of pyrite processing using a reduction roasting magnetic separation method. The iron content of the concentrate was initially 57% ...
Iron removal from kaolinitic coal gangue via magnetic separation …
After magnetic separation, the Fe 2 O 3 content decreased from 5.58% for the raw gangue to 1.00% for the nonmagnetic products of gangues calcined for 60–120 min. Retention of the strongly magnetic magnetite, which was an intermediate product in the oxidation of pyrite to hematite, enabled the effective removal of iron from the gangue ...
Recovery of iron from pyrite cinder by suspension …
Using biochar as reductant, iron concentrate extracted from pyrite cinder as about 61% iron grade could be produced, and the recovery is over 90% under the condition of above 90% grinding particle ...
A green method for selective separation of molybdenite and pyrite …
The X-ray fluorescence (XRF) results reveal that the pyrite sample possesses an iron (Fe) grade of 49.06% and a sulfur (S) grade of 47.49% (as depicted in Table S1). ... Therefore, the EO pretreatment enabled the effective separation of pyrite and molybdenite. EO pretreatment suggested to an environmentally-friendly and low-carbon alternative ...
Recovery of iron from pyrite cinder by suspension …
Recovery of iron from pyrite cinder by suspension magnetization roasting-magnetic separation method: Process optimization and mechanism study | Semantic …
Polysaccharides-based pyrite depressants for green flotation separation …
In addition, during hydrometallurgical processes of non-ferrous metals, pyrite causes iron to enter the solution, ... The synergistic effect of lime (CaO) and TCSS caused a strong depression of pyrite through its flotation separation from chalcopyrite in a wide pH range of 7–12. The metallurgical responses showed that the combination of lime ...
Recovery of Iron from Pyrite Cinder with …
Reduction–magnetic separation has been proved as one of the most effective ways to separate iron mineral and gangue [15, 16]. The sodium salt is an effective additive [17] …
Minerals | Free Full-Text | Changing the Pulp Properties and …
The grinding process plays a crucial role in the floatability of mineral. The present study proposes a scheme to assist in the flotation separation of galena and pyrite by optimizing the choice of grinding media. The effects of grinding media (cast iron balls, steel balls containing 18% chromium, and steel balls containing 12% chromium) on the …
Effect of iron contamination from grinding media on the …
Process. 69 (2003) 87–100; Y. Peng, S. Grano, D. Fornasiero, J. Ralston, Control of grinding conditions in the flotation of galena and its separation from pyrite, Int. J. Miner. Process. 70 (2003) 67–82). In the current study, the effect of iron contamination on the flotation of galena and chalcopyrite on a particle size basis was investigated.
Minerals | Free Full-Text | Removal of Iron from Pyrite-Rich …
In the metallurgical extraction of rare earth elements (REEs), the ratio of contaminant ions to REEs in the leachate dictates the cost and operational efficiency of the downstream processes. The current study investigated the potential iron contamination removal from the feed to the hydrometallurgical process by calcination followed by …
Preparation of Metallic Iron Powder from Pyrite Cinder …
Keywords: pyrite cinder; carbothermic reduction; magnetic separation; metallic iron powder 1. Introduction Pyrite cinders are produced as a by-product of the sulfuric acid industry, containing ...
Removal of Iron from Pyrite-Rich Coal Refuse by …
due to their small particle size, are not efficiently removed [24]. These pyrite framboids are responsible for iron contamination in the PLS and are a common host to trace ele-ments, such as Pb, As, Cd, and REEs [24,25]. Because framboidal pyrite is fine-grained, and pyrites exhibit paramagnetic properties, traditional separation …
Activation mechanism of ammonium oxalate with pyrite in …
The activation properties of ammonium oxalate on the flotation of pyrite and arsenopyrite in the lime system were studied in this work. Single mineral flotation tests showed that the ammonium oxalate strongly activated pyrite in high alkalinity and high Ca 2+ system, whereas arsenopyrite was almost unaffected. In mineral mixtures tests, the …
Recovery of iron from pyrite cinder by suspension …
The results showed that the raw ore for PyC has an iron grade of 56.47%, and after SMR-magnetic separation, magnetic concentrate with an iron grade of 63.24% and an iron recovery of 95.05% could be achieved under conditions of a roasting …
Removal of Iron from Pyrite-Rich Coal Refuse by Calcination …
Removal of Iron from Pyrite-Rich Coal Refuse by Calcination and Magnetic Separation for Hydrometallurgical Extraction of Rare Earth Elements. / Gupta, Tushar; Nawab, Ahmad; Honaker, Rick. In: Minerals, Vol. 13, No. 3, 327, 03.2023. Research output: Contribution to journal › Article › peer-review
Recovery of iron from waste slag of pyrite …
The objectives of the present work are focused on: compare various options for recovery of iron from the waste slag and select the most advantageous option for …
The effect of PAX/CMC addition order on chlorite/pyrite separation
As both the carboxymethyl groups and hydroxyl groups of CMC can also interact with pyrite surface iron sites (Bicak et al., 2007), it is likely that PAX and CMC will compete for the same adsorption sites on pyrite surface. ... CMC can be used to depress chlorite in the flotation separation of pyrite and chlorite, but it also affects the ...
Recovery of Iron from Pyrite Cinder with …
the iron grade of pyrite cinder [13, 14]. Although the recovery rate of iron and separation efficiency of iron mineral and gangue are significantly improved, the sepa-ration efficiency is still insufficient. Reduction–magnetic separation has been proved as one of the most effective ways to separate iron mineral and gangue [15, 16].
Effect of microwave heating on magnetic separation of pyrite
The first application of the magnetic separation process on industrial minerals is to remove iron containing compounds and minerals such as hematite-limonite [5], taconite [6], pyrite (FeS2), and ...
Investigating the selectivity of a xanthate derivative for the
Separating chalcopyrite, an important copper-containing ore, from pyrite is an important mineral-processing objective. Herein, we report the synthesis of S-hydroxyethyl-O-isobutyl xanthate (HEIBX), a novel surfactant bearing both hydroxyl and thione groups, through the attachment of a hydroxyethyl group to sodium isobutyl …
Pyrite | Properties & Facts | Britannica
pyrite, a naturally occurring iron disulfide mineral. The name comes from the Greek word pyr, "fire," because pyrite emits sparks when struck by metal. Pyrite is called fool's gold; to the novice its colour is deceptively similar to that of a gold nugget. Nodules of pyrite have been found in prehistoric burial mounds, which suggests their ...
Recovery of iron from waste slag of pyrite …
Recovery of iron from waste slag of pyrite processing using reduction roasting magnetic separation method. G. F. Zhang*1,2, Q. R. Yang1, Y. D. Yang2, P. Wu2 and A. …
Preparation and characterization of cobalt-doped iron pyrite …
Transition metal doped pyrite (FeS2) thin films: structural properties and evaluation of optical band gap energies. Iron pyrite (FeS2) is a semiconductor comprised of earth-abundant elements and has the potential to be a low cost photovoltaic material with comparatively low toxicity. The properties of transition….
Froth Flotation of Chalcopyrite/Pyrite Ore: A Critical Review
Separation of pyrite and chalcopyrite in deionized water. Particle size −74 + 38 µm. pH = 8 fixed with HCl and NaOH. XFG-II microflotation cell. ... Pyrite, being the most abundant iron sulfide mineral, is commonly associated as a gangue mineral from base metals such as copper, lead, and zinc ...