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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 …
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Pyrite is the world's most abundant sulphide mineral and can take many forms. It can be a highly problematic gangue species in base metal sulphide flotation. …
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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 …
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Pyrite depression in the flotation of copper ores is difficult due to the activation of Cu2+ ions on pyrite surface. In this study, the radical chain reaction involving the redox cycling of Cu(I/II) induced by sodium metabisulphite (MBS) was exploited to selectively depress the flotation of copper-activated pyrite at pH 8.0. Electrochemical …
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The artificial mixed-mineral experiment indicated that EIBXAC could improve the grade of the copper concentrate while maintaining the same recovery, it had higher efficiency and selectivity. ... Compared with the change in the recovery of pyrite flotation, when the dosage of ADD was 15 mg/L, the recovery of pyrite was 73.10%, which was …
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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 ...
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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 …
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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.
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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.
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Figure 2b represents chalcopyrite flotation against pyrite. As the pyrite feed grade increased from 5% to 25%, chalcopyrite flotation against pyrite was improved …
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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 …
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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.
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The tailings go to the hydrocyclone, where the pyrite in the underflow is separated by flotation or gravimetry. The concentrate thus obtained (called "acid …
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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 …
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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 ...
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Due to locked gold in pyrite particles and a high concentration of copper, gold recovery from the leaching of pyrite flotation concentrate is well below the industry standard of gold leaching with more than 90% gold recovery (Zheng et al., 2010, Burns et al., 2012). It has been proposed that an additional circuit consisting of regrinding the ...
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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%.
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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 …
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In this study, the surface modification of arsenopyrite and pyrite with low temperature oxygen plasma was developed as an effective approach to improve the flotation separation efficiency of minerals. The micro-flotation experiments results indicated that plasma pre-treatment can achieve selective flotation of arsenopyrite from …
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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 …
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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 …
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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 ...
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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 ...
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Keywords: Differential flotation, Grade engineering, Selectivity, Pyrite, Arsenopyrite 1 Introduction Froth flotation is an important step in concentrating
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Generally speaking, pyrite flotation is poor at alkaline pH (Aghazadeh, Kamal Mousavinezhad, and Gharabaghi Citation 2015; Hu, Sun, and Wang Citation 2009). ... This results in more pyrite flotation and a lower Cu concentrate grade accordingly. In flotation plants, the operators often have to sace Cu recovery to accommodate the …
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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 ranging from …
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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, ...
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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 ...
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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 …
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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 ...
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