Study of the Technology for Gold Recovery from Gravity-Flotation …

The content of sulfide minerals is 36.1%, the main sulfides are arsenopyrite (25.4%) and pyrite (10.7%). Microscopic examination of the combined gravity-flotation concentrate revealed ultrafine, fine and visible gold dust particles both in free form and in aggregations with waste rock. The particle size of Au in the product varies from 0.5 to ...

Effect of regrinding conditions on pyrite flotation in the …

Pyrite single mineral was used to simulate pyrite rougher flotation concentrate obtained at Telfer flotation plant which contains about 80% pyrite. Pyrite mineral was purchased from GEO Discoveries, Sydney and originated from Peru. The XRD spectrum of the pyrite sample is shown in Fig. 1. All of the peaks appeared in the spectrum are attributed ...

Selective depression of pyrite with a novel thiocarbonate in a pyrite …

Herein, a novel micromolecular organic reagent, sodium O-(2,3,4,5,6-pentahydroxyhexyl) carbonodithioate (SPHC), was synthesised and employed as a selective depressant for pyrite in the flotation separation of bulk galena/pyrite concentrate. Micro-flotation tests demonstrate that SPHC exhibits superior selectivity and depressing ability on pyrite.

Full article: Impact of Pyrite Textures Prevalence on Flotation

Depending on the flotation conditions, pyrite can be naturally floatable, accompanying valuable minerals in the flotation process, yielding a low-quality concentrate …

Effect of pyrite textures and composition on flotation …

Different pyrite textures may influence flotation by altering the electrochemical properties of pyrite and the ways it interacts with the pulp, or they can introduce naturally …

Molybdenum Ore Processing by Flotation

This molybdenum flotation circuit, based on 250-500 tons per 24 hours is designed for low-grade molybdenum ore having high-grade streaks and with pyrite-quartz gangue.It is also basically sound for many other friable sulphide ores, such as antimony, silver and even some lead ores. The basic ideas stressed in this moly flotation flowsheet are the importance of simplicity …

Flotation ofOk Tedi Pyrite

Its presence in the flotation concentrate is not entirely desirable since it lowers the grade ofthe final copper concentrate. Lime depression of the pyrite has been practiced with some ... pyrite flotation in the pH range of1 to 12, Fuerstenau etal. (1968) obtained two recovery peaks at pH values of 4 and 9. Also, in the flotation ofpyrite by ...

Effects of Pyrite Texture on Flotation Performance of …

A combined copper rougher concentrate was produced assaying 2.4% Cu at 5.1% recovery. Following the copper flotation stage, pyrite rougher flotation was performed at the same pH using 100 g/t TomAmine as collector. A pyrite rougher concentrate was produced assaying 28% S at 25% recovery and 29% mass pull.

Flotation of Gold and Gold-Bearing Ores

The demand for sulfuric acid initiated by the booming uranium industry during the late 1960s provided the catalyst for the installation of pyrite flotation plants on numerous gold mines in South Africa (Bushell, 1970, Broekman et al., 1987).After roasting the pyrite flotation concentrate to generate sulfur dioxide for the sulfuric acid plant, the remaining calcine was …

Evaluate the Depression of High-Concentration Pyrite in …

To effectively depress pyrite in copper flotation, a conventional approach is to substitute forged steel grinding media with high-chromium (HiCr) steel grinding media.

Hydrometallurgical processing of pyrite concentrates …

The chemical composition of the pyrite concentrate obtained during the enrichment of the ore from the Yoshlik deposit was determined using optical emission, atomic absorption, gravimetric, IR …

1 Froth Flotation – Fundamental Principles

several methods that are useful for examining froth flotation processes: (a) Ratio of Concentration, the weight of the feed relative to the weight of the concentrate, The Ratio of Concentration is F/C, where F is the total weight of the feed and C is the total weight of the concentrate.

Evaluate the Depression of High-Concentration Pyrite in …

As the pyrite feed grade increased from 5% to 25%, chalcopyrite flotation against pyrite was improved when 30 wt% Cr steel was used as the grinding media, but this improvement was not enough to maintain a high Cu concentrate grade due to a reduced Cu recovery and more pyrite recovered.

Critical importance of pH and collector type on the flotation …

In both lead and zinc circuits, pyrite is the main sulphide gangue mineral. It is critical to decrease the presence of iron (Fe) and Zn in the lead concentrate during the flotation of galena.

Evaluate the Depression of High-Concentration Pyrite in …

To effectively depress pyrite in copper flotation, a conventional approach is to substitute forged steel grinding media with high-chromium (HiCr) steel grinding media. It has …

A Brief Review of Auriferous Sulphide Flotation …

Keywords: Differential flotation, Grade engineering, Selectivity, Pyrite, Arsenopyrite 1 Introduction Froth flotation is an important step in concentrating

Froth Flotation of Chalcopyrite/Pyrite Ore: A …

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 …

Application and depression mechanism of sodium sulfite on galena-pyrite

In galena flotation from galena and pyrite mixed concentrate, Na 2 SO 3, and CaO were used as depressants for pyrite, and DDTC was used as a collector of galena. The chemical reagents used in single mineral flotation, including EX, Na 2 SO 3, terpineol, HCl, and NaOH, were all purchased from Sinopharm Chemical Reagent Co., Ltd. and were of ...

Nitric acid treatment of a pyrite rougher concentrate to …

Metallurgical results confirmed that it is possible to upgrade the Au:S values of a pyrite flotation concentrate by using a hydrometallurgical scheme for preparation before flotation. A 144% increase in Au:S value was obtained with 25% oxidation of the pyrite concentrate with a gold recovery of 56%.

A Brief Review of Auriferous Sulphide Flotation …

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 ...

Microwave roasting of flash flotation concentrate containing pyrite …

3.3. Conventional roasting of flotation concentrate. Roasting in the auriferous industry involves the heating of complex or refractory gold concentrates containing sulphides (mainly pyrite and arsenopyrite) and carbonaceous materials in air to produce volatile arsenic xide (As 2 O 3), sulphur dioxide (SO 2) and carbon dioxide (CO 2).The iron is also oxidised …

Optimized Bioleaching Pre-treatment of UG-2 PGM Flotation Concentrate …

The results showed a substantial extraction of base metals from UG-2 PGM flotation concentrate suggesting a potentially feasible option for industrial bioprocessing of PGM concentrates. To the best of the authors' knowledge, this is the first report on bioleaching of base metals from UG-2 flotation concentrates. ... pyrite bioleaching, M ...

Effect of pyrite content of feed and configuration of locked …

Since the size fraction below 44 µm in concentrate is found to be liberated without being locked with CP/PY particles (Fig. 9), the higher iron content below this size can be due to the flotation of free pyrite particles as a result of copper activation and/or entrainment phenomena, which is not too much different for two feed types as ...

Full article: Impact of Pyrite Textures Prevalence on Flotation

Depending on the flotation conditions, pyrite can be naturally floatable, accompanying valuable minerals in the flotation process, yielding a low-quality concentrate that hinders smelting operations (Finch, Rao, and Nesset Citation 2007; Mu, Peng, and Lauten Citation 2015; Wang and Forssberg Citation 1996; Young et al. Citation 2006). Once in ...

Hydrometallurgical processing of pyrite concentrates …

the ore of the Yoshlik deposit, it was revealed that pyrite flotation is required to enrich the ore. Without pyrite flotation, gold recovery is low from 52 to 68%, with the use of pyrite flotation, the recovery increase is up ... The pyrite concentrate obtained during the enrichment of porphyry copper ore from the Yoshlik deposit was chosen as ...

Recovery of pyrite from copper tailings by flotation

The results obtained both at laboratory and industrial scale showed that it is possible to produce concentrates with a pyrite grade over 90% and recoveries over 70% in a …

Assessing the depression of high-concentration pyrite in …

Such low Cu concentrate grades produced from the flotation of the ore with 25 % pyrite even at high pH indicated difficult pyrite depression when pyrite feed grade was high. To better visualise pyrite flotation behaviour, pyrite recovery and the mass of recovered pyrite from the flotation were plotted against pulp pH in Fig. 2 .

Green and efficient comprehensive utilization of pyrite concentrate…

Pyrite concentrates, which contain rich pyrite (FeS 2), are solid wastes or byproducts in nonferrous metal production processes, such as copper, lead, zinc, and coal treatment.Pyrite has been the mineral resource for sulfuric acid production in China [1], [2], [3], [4].However, the pyrite concentrate produced by polymetallic sulfide mines has a high content …

Copper and Pyrite Separation by Selective and …

A copper-pyrite mill in Canada uses the 12-cell No. 21 "Sub-A" Flotation Machine, shown above, for roughing, and a 2-cell No. 21 "Sub-A" Flotation Machine for cleaning to produce a fairly coarse pyrite concentrate …

Recovery of pyrite from copper tailings by flotation

Tailings that are generated in the copper concentrate production contain great amount of sulfide mineral, in particular pyrite. Pyrite in contact with water and oxygen might oxidize spontaneously ...

Differential flotation of pyrite and Arsenopyrite: Effect of …

In conclusion, a gold concentrate containing low sulfur (10.8%) with a gold recovery of greater than 95% is achievable from a two-stage flow sheet (collectorless flotation as the rougher stage and ...

The depression of pyrite in selective flotation by different …

Pyrite (FeS 2, iron disulfide), is the most abundant sulfide mineral and commonly associated with valuable minerals such as sphalerite, chalcopyrite, galena, gold as well as coal (Wang and Forssberg, 1991, Wang, 1995, Dimitrijevic et al., 1996, Jiang et al., 1998).Pyrite has very low economic significance and is usually removed from the valuable components by …

Recovery of high-grade copper concentrate from sulfur-rich …

The use of pyrite depressants is one way to remove pyrite from flotation concentrate (Ahmed Khoso et al., 2019, Khoso et al., 2019a).To date, inorganic reagents such as lime and cyanide are the most common depressants for pyrite flotation (Mu et al., 2020a, Mu et al., 2016c).Lime depressed pyrite by keeping the pH of the pulp in a very high alkaline condition …

Differential Flotation of Pyrite and Arsenopyrite: Effect …

downstream processing (e.g. pre-treatment, leaching, smelting). Mixed pyrite-arsenopyrite flotation concentrate, from a given refractory ore, is achieved conventionally with relative ease owing to ...

Solving the mystery of natural pyrite flotation

Tarnish on the Mountain copper pyrite tended to prevent flotation. Sulfuric acid was the most effective addition agent in removing the tarnish, and giving good recoveries of the …

Processing a bulk pyrite concentrate by flotation reagents

Keywords Flotation, pyrite, zeta-potential. arsenopyrite, gold, concentrate, reagents, modifiers, INTRODUCTION The traditional application of flotation is mainly to sulphide minerals [1,2]. The separation of pyrite from other sulphides, is usually achieved by carefully controlling the operating conditions and the addition of flotation reagents ...