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The depressive effect of tricarboxystarch on pyrite was more selective and effective than native starch. Excellent selective separation between pyrite and chalcopyrite can be achieved by adding tricarboxystarch to a low pH solution [37]. Flotation of pyrite was depressed more significantly than that of the chalcopyrite after H 2 O 2 treatment.
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The effect of calcium hypochlorite (Ca(ClO)2) on the flotation separation of covellite and pyrite with ammonium dibutyl dithiophophate (ADD) has been investigated through micro-flotation tests ...
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However, the challenge of separating chalcopyrite from pyrite effectively during flotation persists due to their similar flotation properties [10]. Furthermore, Cu 2+ ions released from chalcopyrite can inadvertently activate pyrite [11], [12]. To overcome this problem, the lime process with high alkalinity is widely employed in industrial ...
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The separation of tellurides from pyrite can be carried out by selective flotation. The selection and dosage of collectors and pulp pH are very important to produce one concentrate containing tellurides and free gold, and a further concentrate containing pyrite. ... Selective flotation of pyrite and gold tellurides 337 TABLE 3 Comparison of ...
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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 ...
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Effective methods for selective separation using flotation or flocculation of arsenopyrite from pyrite by biomodulation using Acidithiobacillus ferrooxidans are presented here. Adhesion of the bacterium to the surface of arsenopyrite was very slow compared to that to pyrite, resulting in a difference in surface modification of the …
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Arsenopyrite mineral surface oxidises faster compared with pyrite minerals.. Relatively low collector strength provides wider, narrow window for pyrite and arsenopyrite separation. • PAX displays superiority over DTP in separating pyrite and arsenopyrite with hydrogen (H2O2) addition.. Adsorption of H2O2 oxidised, hydrophilic collector species …
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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 …
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In flotation process, the hydrophilic substances and collectors compete for adsorption on the surface of minerals, thereby reducing the floatability of minerals. In this study, the effects of seawater on the flotation separation of …
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To effectively separte pyrite from chalcopyrite, tetrazine thione group and hydrocarbon chain were combined to synthesize tetrazine thione collectors. The flotation performance of tetrazine thione collectors on chalcopyrite and pyrite was investigated, and the influence of different hydrophobic groups on the flotation performance was …
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ABSTRACT Four oxidants, NaClO, KMnO4, K2Cr2O7, and H2O2, were used to promote the flotation separation of pyrite (FeS2) from arsenopyrite (FeAsS). Ore flotation results indicate that H2O2 has the best selectivity for the As-S separation. When H2O2 is used, the As content in pyrite concentrate decreases from 2.27% without …
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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
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Low pyrite flotation is achieved after regrinding in the presence of chalcopyrite. • High pyrite flotation is achieved after regrinding in the presence of chalcocite. • These phenomena are governed by the electrochemical activity of chalcopyrite and chalcocite. • Flotation and separation are less affected by primary grinding at …
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A satisfactory separation of chalcopyrite and pyrite was achieved at weakly alkaline condition (pH 8), at which the flotation recovery of chalcopyrite was 86.11% and that of pyrite was only 13.85%.
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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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The gold contained in copper ores is an important resource for the gold industry. In some cases, elemental gold is present and can be recovered by selective flotation. It has been reported that the gold …
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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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One of the more common classes of ores containing gold is when gold is associated with pyrite, pyrrhotite, and arsenopyrite. This is the area of gold recovery that has probably received the most research …
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Gold telluride ores are important gold refractory ores due to the presence of sulfides and other gangue materials. The classification and main physical properties of gold telluride ores were described, and possible treatment methods including flotation, leaching, and oxidation were reviewed. The results show that flotation procedures are much …
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The separation of arsenopyrite from pyrite has always been a complication due to the lack of green and high-efficiency flotation reagents. In this study, a macromolecular organic depressant soluble starch (SS) was introduced, and its application and depression mechanism in the selective flotation separation of arsenopyrite and …
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1. Background. The application of flotation on a reasonable scale within the gold-mining industry commenced in the early 1930s following the introduction of water-soluble flotation collectors (specifically xanthates and dithiophosphate collectors) that allowed differential flotation of sulfide minerals (Weinig and Carpenter, 1937; Rabone, …
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Natural arsenopyrite and pyrite samples used in this study were obtained from Yunnan Province, China. The elemental compositions of mineral samples are shown in Table 1.High-purity samples were manually selected and ground to −75 μm, of which the −75 + 38 μm particles were used for flotation tests, plasma modification pulp chemistry …
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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 …
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Pyrite flotation separation and encapsulation in tailings dams is proposed as a viable way to chemically stabilize tailings. Characterization of potential acid mine generation in tailings led to an innovative process in which acid-generating pyrite is separated by flotation from the coarse tailings and incorporated into the slime zone. …
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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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Bench-scale flotation tests confirmed the feasibility of selective separation of gold from pyrite by using hydrogen peroxide as an oxidizing agent and amyl xanthate …
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1. Introduction. Over 21 Mt copper were produced annually worldwide in 2021, Chalcopyrite is the major mineral for smelting copper, it is closely associated with pyrite [1].To obtain a copper concentrate for smelting, flotation separation of chalcopyrite and pyrite must be carried out [2].At present, xanthate is widely used as a collector in …
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This is the way to separate gold-pyrite ore in the future. #4 Flotation-Roasting-Cyanidation and Tailings Cyanidation Treatment. In process IV, we first treat the ore by flotation, then roast the flotation concentrate, and do cyanidation afterwards. ... Flotation of gold-bearing sulfides and cyanidation of flotation concentrates are the …
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The flotation separation test of the pyrite-arsenopyrite artificial mixed minerals was conducted using the combined depressants. Fig. 5 depicts that a pyrite concentrate, with a grade of 49.85 wt.% S and 3.84 wt.% As and a recovery of 50.73 % S and12.11 % As was obtained. In contrast, the obtained arsenopyrite contained 41.19 …
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