DOI: 10.1016/S0301-7516(97)00018-5 Corpus ID: 98674614; Selective flotation of gold from pyrite under oxidizing conditions @article{Monte1997SelectiveFO, title={Selective flotation of gold from pyrite under oxidizing conditions}, author={Marisa Bezerra de Mello Monte and Fernando Antonio Freitas Lins and Jose F. L. de Oliveira}, …
The basic factors, principles and variables affecting froth flotation are enumerated in condensed form below: Ore. (a) Mineralogical character. (b) Fineness of grinding. (c) Method of grinding. Agents. (a) Principal flotation agent. ("Oil") α Character. β Quantity. (b) Minor agent. α Character. β Quantity. Water. (a) Quantity with respect to …
Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces in a mineral/water slurry. The particles with attached air bubbles are then carried to the surface and removed, while the particles that remain completely wetted stay in the liquid phase. …
Froth flotation is a three phase separation process for complex ores based on the manipulation of the difference in hydrophobicity of the solids. Suspended, hydrophobic metal-rich particles are contacted with, and subsequently combine to, air bubbles — whilst the more hydrophilic gangue particles sink and are recovered to the …
Froth flotation is a highly versatile method for physically separating particles based on differences in the ability of air bubbles to selectively adhere to specific mineral surfaces …
Even if more selective separation was achieved from the pyrite flotation (selectivity index∼5), 40% of sphalerite in the ore was transferred into the pyrite concentrate. In addition, the results of the collectorless tests indicated that more than 80% of the gold can be recovered, and higher selectivity indexes (up to 10) are achievable.
This thorough volume describes state-of-the-art research and practice in mineral froth flotation as known and practiced a century after its introduction. Recognized experts provide in-depth coverage on the historical aspects of flotation; flotation fundamentals; flotation chemistry; flotation cells, modeling, and simulation; and flotation plant …
In addition, Eric et al. [23] investigated the flotation performance of gold in porphyry copper-gold ore by first-order flotation kinetics, which indicated that an increase in flotation time of copper rougher stage cannot result in the increase in gold recovery and some gold particles can only be recovered by pyrite flotation. However, none of ...
1. also for beneficiation and separation of difficult-to-treat (refractory) gold ores. Flotation is also the best method for recovery of gold from base metal ores and gold-containing …
Notwithstanding, in the separation of gold bearing sulphides during froth flotation, a concentrate made up of both pyrite and arsenopyrite is obtained due to their similar characteristics and ...
Froth Flotation Froth flotation is one of the most versatile and flexible of all mineral separation processes. Reasonable ... and depresses pyrite. Frothers such as pine oil and Dowfroth 250 are used to create a froth capable of carrying or holding the mineral-laden bubbles. Frothers impart a temporary toughness to bubbles prolonging life until ...
Mineral, metal values, and by-products can be recovered by flotation separation. The economic aspect of the recovery of useful valuable minerals (such as gold), contributing to recycling meanwhile with environmental technology and wastewater treatment, was enlightened, for instance, of gold from arsenic-rich auriferous pyrite …
Gold-containing ore processing technology has been developed by using chemical, X-ray phase, mineralogical, X-ray fluorescence analyses. The results of experiments on the gold recovery from a concentrate with a particle size of 10 and 4 µm are presented, including options for direct cyanidation without preliminary oxygen oxidation, …
Fig. 1 shows the influence of sodium oleate concentration on the flotation recovery of calcite, dolomite, pyrite and chalcopyrite single minerals at pH 10. As can be seen, chalcopyrite floated readily with sodium oleate, followed by calcite, dolomite and pyrite. With 10 −4 M sodium oleate, over 90% of the chalcopyrite and calcite and about …
The depressing action of cyanide on pyrite during froth flotation is well known (Sutherland and Wark, 1955) and is widely exploited on many flotation plants to selectively separate copper minerals from pyrite.
The EIBXAC–pyrite complex (Fig. 9 (d)) exhibited characteristic pyrite-surface -CH 3, -CH 2, C O, C-O-C and C-S peaks at approximately 2942.61, 2926.98, 1753.72, 1218.33 and 913.1 cm −1, respectively, suggesting that EIBXAC was adsorbed on the pyrite surface, indicating that the electron cloud density shifted to the Fe atoms, and …
ADEDTC was a better collector for selective flotation separation of chalcopyrite from pyrite. The authors highlighted that the ability to donate electrons …
Gold concentration usually consists of gravity separation, flotation, cyanidation, or the combination of these processes. The choice among these processes depends on the mineralogical characterization and gold content of the ore. Recently, the recovery of gold using gravity methods has gained attention because of low cost and …
Froth flotation is the most important physicochemical pretreatment technique for processing low-grade sulfide ores. In other words, flotation separation can …
In order to investigate the effect of particle size on the flotation performance in the separation of copper-gold-lead, froth products of various size fractions were collected as a function of flotation time. The optimum dosage of potassium dichromate (K 2 Cr 2 O 7) and sodium diethyldithiocarbamate (DDTC) were determined …
In froth flotation separation, the first use of polysaccharides dates back to 1928 and has continued up to now [34].Although several polysaccharides have been recently synthesized and extensively used for pyrite depression in different mineral processing plants, no comprehensive review article has universally explored their …
At the same time, they invented modern froth flotation which is characterized by separating and enriching valuable sulfide minerals from ores by using froth to carry ore particles upward. In 1922, cyanide was used to suppress sphalerite and pyrite, and the selective flotation process was developed.
Notwithstanding, in the separation of gold bearing sulphides during froth flotation, a concentrate made up of both pyrite and arsenopyrite is obtained due to their similar characteristics and flotation response. Separation of gold predominated arsenopyrite minerals from less economical pyrite phase maximises
Froth Flotation 101 in Video. Previous. Next. ... With the recent developments in flotation reagents it is now possible to separate non-metallics. ... copper ores and lead-zinc ores, depression of the iron …
The difficulties of their flotation separation are: (1) ... research by Laskowski et al. [137] showed that froth-mineral adhesion must first overcome the energy barrier between mineral particles and froth to produce effective adhesion (i.e. the contact angle is greater than 0). The existence of an energy barrier is the primary obstacle to the ...
Copper sulphate is frequently helpful in accelerating the flotation of pyrite and arsenopyrite. In rare instances sulphuric acid may be necessary, but the use of it is limited to ores containing no lime. "Ammo …
The fundamental understanding of the improvement in selectivity with the addition of MTP in the flotation of elemental gold from pyrite is limited and is the subject of this paper.
In the present work an intense bibliographic search is developed, with updated information on the microscopic fundamentals that govern the behavior of flotation operations of chalcopyrite, the main copper mineral in nature. In particular, the effect caused by the presence of pyrite, a non-valuable mineral, but challenging for the …
Notwithstanding, in the separation of gold bearing sulphides during froth flotation, a concentrate made up of both pyrite and arsenopyrite is obtained due to their similar characteristics and ...
coarse. Some deposits contain up to 3% pyrite. Size of the gold contained in pyrite ranges from 0.01to 0.07 μm Hydrothermal This type contains a variety of ores, including(a) gold-pyrite ores, (b) gold-copper ores, (c) gold-polymetallic ores and (d) gold oxide ore, usually upper zone of sulphide zones. The pyrite content of the ore varies from
The paper is about the froth flotation process and its application. It is a metallurgical process for the extraction of metals in a pure state from their ores: especially for sulfide ores.
Conditions of operation of froth-flotation. Froth-flotation is in general effective only on ores ground to pass 0.3-mm. aperture or less and the agitation-froth and bubble-column processes are most effectively practiced when the bulk of the feed will pass a 0.074-mm. screen.
Han et al. [Citation 89] utilized LA as an effective depressant for separating pyrite from chalcopyrite in froth flotation (pH 8) when sodium butyl xanthate (SBX) was used as a collector. LA showed a satisfactory depression impact on pyrite particles, while chalcopyrite floatability was not affected ( Figure 5 ).
Froth flotation is a physicochemical separation process in which a mixture of fine mineral particles is mixed with water in a large tank (cell), and a swarm of small air bubbles …
Copper sulphide ore deposits are of great economic significance for copper extraction. In order to enrich copper sulphides, froth flotation at alkaline pH is typically applied to reject associated gangue minerals, in particular pyrite before the subsequent pyrometallurgical treatment to extract copper from copper sulphides [].The selective …