Gold often coexists with pyrite as micron and submicron-inclusions and pyrite is therefore floated to maximize gold recovery in gold processing plants. In practice, different types of grinding media and a great range of pH and collector concentrations are used for pyrite flotation without scientific guidance.

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 this regard ...

The flotation of gold-bearing pyrite in Paddington, Harbour Lights, Fimiston, Oroya-Fimiston, Oroya-Mt Charlotte and Three Mile Hill in Western Australia takes place at neutral pH 7.0–7.2 (O'Connor and Dunne, 1991). Pyrite flotation plants at Agnes in South Africa, Snip Mine in Canada, Lancefield and Wiluna Gold Mine in Western Australia are ...

A selective collector in the flotation of elemental gold from sulfide minerals improves both gold grade and recovery. The typical collector, such as DTP, floats gold …

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

Differential flotation of the iron sulfides (Poling and Beattie, 1984), pyrite, pyrrhotite and arsenopyrite is a unique process in the gold industry. There is scope on …

Nevertheless, as this gold comes under the head of non-amalgamable gold, its physical state and the causes of its disinclination to unite with mercury may conveniently be considered here. In general, pyrites yields only a small proportion of its gold contents if it is run over the amalgamated plates, and if it is ground very fine in a pan with ...

The effects of clay minerals on gold flotation were investigated by comparing the flotation behaviour of gold in the high-clay-content ore and the clean ore. Fig. 1 shows the cumulative gold grade as a function of the cumulative gold recovery. ... and alkalescent (pH = 9.0) environment affecting pyrite flotation were investigated. The pyrite ...

The auriferous pyrite ore (80% passing 100 µm) used in this study was collected from the feed to the flotation circuit at No. 2 Gold Plant. Typical chemical and mineralogical compositions are shown in Table 1, Table 2.After filtration, approximately 500 kg of the material was dried at about 60 °C for 48 h, screened at 850 µm to break any …

The poor copper and gold flotation and poor pyrite rejection should be related to the reducing regrinding condition. Javadi Nooshabadi et al. (2013) proposed that hydrogen peroxide formed on fresh pyrite surfaces even in the absence of oxygen, and oxidized the pyrite surfaces. However, in this study, the oxidation of pyrite surfaces may …

Kinetics of semi-batch flotation behavior of a gold ore from North-Western Quebec, Canada was investigated with respect to fineness of grind (P 80). The gold was mostly assocd. with pyrite in native form as inclusions and was also in contact with pyrite along the boundaries of non-sulfide gangue.

1. Introduction. Pyrite and arsenopyrite are the most important mineral phases in sulphide refractory gold ores due to their associative property in hosting gold and concomitant effect on gold extraction processes (Arehart et al., 1993, Asamoah et al., 2018a, Asamoah et al., 2019c, McCarthy et al., 2018, Zhang et al., …

The recovery of gold associated with arsenopyrite and pyrrhotite has a similar response pattern from both collector and pH viewpoints as illustrated in Figures 8 and 9. It is sometimes desired to recover arsenopyrite away from pyrite. This is also an active area of flotation research and clearly the regulation of flotation pulp electrochemistry ...

Pyrite is separated from other minerals mainly by flotation. However, the hydrophilicity of pyrite is affected by many factors, causing it to easily enter the concentrate and consequently reduce the quality of concentrate. Highly efficient pyrite depressants can be selectively adsorbed on the surface of pyrite to improve its hydrophilicity, thereby …

Following flotation process, the flotation concentrate or tailings are redirected to the cyanidation circuit for gold extraction that may contain appreciable amounts of collector used in flotation, and also remained sulfide minerals, i.e., predominantly pyrite.

A case study of the separation of copper-gold sulfide ore from pyrite using a novel flotation reagent scheme: Insight from first-principles calculations [J]. Journal of Central South University ...

In copper-gold flotation plants, pyrite which is depressed in copper flotation is often floated subsequently with the addition of sodium sulfide (Na 2 S) to recover the associated gold. For the first time, this study investigated the role of Na 2 S responsible for the flotation of pyrite depressed in chalcopyrite flotation through flotation ...

Pyrite (FeS 2, iron disulfide), is the most abundant sulfide mineral and commonly associated with valuable minerals such as sphalerite, chalcopyrite, galena, …

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 …

Cyanide is a highly effective depressant for sulfide flotation, A c c e p t e d M a n u s c r i p t N o t C o p y e d i t e d such as pyrite, chalcopyrite, and sphalerite flotation [25]. Cyanide ...

Abstract. The practice of the flotation of pure gold and gold-bearing ores such as tellurides, aurostibite, kerogen, pyrite, pyrrhotite, copper-gold ores and mixed sulphides is reviewed. The factors which influence the choice of collectors, pH and Eh, are discussed as well as the application of differential flotation.

In copper-gold flotation plants, pyrite which is depressed in copper flotation is often floated subsequently with the addition of sodium sulfide (Na 2 S) to recover the associated gold. For the first time, this study investigated the role of Na 2 S responsible for the flotation of pyrite depressed in chalcopyrite flotation through flotation ...

In this work, different flotation–preoxidation–cyanidation methods are considered for treating a low-grade refractory gold ore. On the one hand, the results of selective flotation show that 22% and 31.1% of total Sb and As, respectively, remained in the final tailings and only about 28% of the total Au remained for further cyanidation …

In this work, the flotation response of a refractory gold (Au) ore containing arsenic (As) mainly in the form of arsenian pyrite is investigated to reject gold-barren sulphidic phases. The recovery of Au increased with an increase in CuSO 4 concentration to 0.3 kg/t, beyond which further increase in concentration yielded no significant recovery.

The flotation of auriferous pyrite in gold leach residues through traditional techniques is only possible after conditioning with sulphuric acid to overcome depression by cyanide and hydroxide ...

Copper ions are often added in the flotation of gold-bearing pyrite to activate pyrite so that high gold and pyrite recoveries can be achieved. However, the residual copper ions are problematic in subsequent cyanidation by consuming cyanide. There is a great need to replace copper ions by lead ions which are beneficial to cyanidation.

Gold associated with pyrite in Witwatersrand gold ores occurs mainly as minute inclusions and veinlets (a few microns in size) locked in the pyrite matrix (Anhaeusser et al., 1987). In general the flotation of gold associated with sulphides follows the same trend as the flotation of these sulphide minerals which are greatly affected by …

Copper sulphides are selectively floated from pyrite ores at high pH's in excess of 11. It is less clear how the free gold behaves under these conditions. In …

For sample 1 by flotation, 87.90 and 16.36 % recovery of gold and silver are obtained respectively in the concentrate for a gold head grade of 0.24 g/T, and less than 0.5 g/T of silver with a ...

The flotation of auriferous pyrite in gold leach residues through traditional techniques is only possible after conditioning with sulphuric acid to overcome depression …