The study of Fairthorne et al. indicated that the flotation of chalcopyrite and pyrite at pH 7 increased with the concentration of O-isobutyl-Nethoxycarbonyl …
The FLOTATION PROCESS is one of the commonest methods of extracting the valuable minerals from certain classes of ores, and it is generally more efficient as regards the recovery of the minerals than any other process applicable to the treatment of similar types of ores. The metallic contents of the minerals are recovered from the …
The pyrite and arsenopyrite model mineral samples used in this study were obtained from GeoDiscoveries Australia. The chemical composition of the minerals using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) is shown in Table 1.XRD analysis of the as …
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 ...
XPS spectra for concentrate and tails samples of pyrite-rich Mount Isa copper ores (Grano, 1990) showing the presence of carbon in the pyrite (Binding Energy (eV), g-graphitic, c-carbonate). Test carried out under nitrogen purge conditioning at pH 8, in the absence of collector. ... Pyrite flotation recovery as a function of solution potential ...
Semantic Scholar extracted view of "Microwave roasting of flash flotation concentrate containing pyrite, arsenopyrite and carbonaceous matter" by R. Amankwah et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 220,368,211 papers from all fields of science ...
The Kokkola refinery operated by Outokumpu Oyj processed pyrite-pyrrhotite flotation concentrate recovered as a by-product from the Outokumpu copper mine for recovery of base metals between 1966 and 1987 (Palperi and Aaltonen Citation 1971; Sauni et al. Citation 2010). The pyrite-pyrrhotite concentrate graded 0.67% Co, ...
Investigation of the differential flotation characteristics between arsenopyrite and pyrite in a ore concentrate have been carried out on a laboratory Leeds flotation cell. Experimental results indicate that some limited separation between arsenopyrite and pyrite is possible by differential flotation under the conditions of high pH and low pulp redox potential. The …
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.
It is unknown whether high pH could still depress high-concentration pyrite in copper flotation. This research aimed to examine the ability of high pH to depress high …
Question: Solve this question precisely for me.a) A mining company uses 8 flotation tanks to produce a sulfide (pyrite andarsenopyrite) concentrate, the total mass pull of the operation is 18%, whichis equivalent to 28 m3/min of concentrate. The flotation feed used is 30%solids at F80% of 150 µm. The flotation concentrate ...
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., …
DOI: 10.1016/j.mineng.2022.107421 Corpus ID: 246617963; Differential flotation of pyrite and Arsenopyrite: Effect of pulp aeration and the critical importance of collector concentration
To effectively depress pyrite in copper flotation, a conventional approach is to substitute forged steel grinding media with high-chromium (HiCr) steel grinding media. …
Pyrite flotation was applied on the copper rougher tail using TomAmine at pH 10.5–11. A pyrite concentrate was produced assaying 50% S at 68% recovery.
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 …
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 …
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 …
Efficient depressants are needed to inhibit the floatability of pyrite in the flotation separation of coal and pyrite. Liu and Wu noted that the desulfurizing efficiency …
Depending on the flotation conditions, pyrite can be naturally floatable, accompanying valuable minerals in the flotation process, yielding a low-quality …
Moreover, increasing pyrite proportion resulted in an improvement of pyrite floatability, consequently diluting the flotation concentrate with a decreased Cu grade. The mechanisms responsible for the effect of pyrite proportion on chalcopyrite and pyrite flotation behaviour were investigated further below. 3.2.1.
Natural pH is recommended for gold flotation. Alternatively using soda ash for pH adjustment can reduce gold depression. Where gold is associated with pyrite in base metal ores where iron sulphides are depressed and report to the tailings, a separate tailings pyrite flotation concentrate should be considered.
In the flotation separation of galena-pyrite mixed concentrate, large amounts of lime (CaO) are used for the depression of pyrite. In this study, the negative effects of lime were reduced by using an efficient depressant Na 2 SO 3 + CaO reagent in the flotation separation of galena from pyrite.
The pyrite flotation results clearly demonstrate that different flotation domains exhibit significantly different pyrite recoveries. Overall, these values are similar to those obtained by Grano et al. (1990). ... The flotation concentrate obtained using the OD2 FGP orebody was further subjected to x-ray photoelectron spectroscopy (XPS) …
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%.
The present study therefore investigated microwave roasting of coarse flash flotation concentrate containing carbonaceous matter, pyrite and arsenopyrite. The release of carbon, sulphur and arsenic was monitored, and the changes in preg-robbing behaviour of the concentrate were also investigated.
The depression of pyrite flotation by polysaccharides is due to the selective adsorption of polysaccharides polymers on pyrite surface. Bulut et al. (2011) investigated the depression effect of starch on pyrite flotation and found that starch was effective at a low dosage (1.7 mg L −1) and more pronounced at alkaline pH (10) than natural pH ...
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. …
Galena, sphalerite, and pyrite are important metallic sulfide minerals and are often associated with one another. In the flotation separation of galena-pyrite mixed concentrate, large amounts of ...
Flotation of copper at different alkaline pH from 7upto 10 and using different Xanthates as collector vs. recovery of copper may give some clue. Minimum Pyrite obtained in copper concentrate is the starting point for further flotation …
1. Introduction. 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 …
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 …
The flotation concentrate is filtered, bagged, and sent to a smelter (Bried et al., 2000). There are six gold mines in the Australasian region that treat refractory gold ores. The largest of these is the Porgera Gold Mine in Papua New Guinea, where a pyrite–arsenopyrite flotation concentrate is pressure leached.
Flotation concentrates are an important resource for cobalt and base metals (Cu & Zn). NaNO 3 is an effective oxidant for pyritic flotation concentrate in H 2 SO 4 media.. NaNO 3 and temperature are the most significant factors affecting Co extraction.. Ultra-fine grinding improves the kinetics of metal extraction. • Cobalt extraction relies …
Flotation separation of the pyrite from these tailings will make it possible to produce a neutral tailings that could be used as a cover material for the tailings dam, …
By separating the pyrite from the tailings by flotation during the final years of operation of a plant, two fundamental aspects could be achieved: (1) a neutral tailings can be produced and used as a cover material for the dam containment wall, and (2) encapsulation of the pyrite concentrate with 2–3 m of fine material with little capacity to ...
Previous studies show that galena and sphalerite exhibit the stronger affinities for flotation collectors than pyrite (Feng et al., 2019, ... Fig. 3 b shows that the Pb recovery in the flotation concentrate increases to ~70% as the dosage of BX increases to 40 g/t and then remaines stable despite a further rise in the dosage of BX. At 40 g/t ...
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 ...
