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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 ...
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 ...
Gold and pyrite separation by flotation could possibly be achieved in this system due to the significant differences in hydropho- bicity found between gold and pyrite (Figs. 4 and 5). Fig. 6 shows the results of measurements of the electrophoretic mobility of pyrite as a function of pH for different conditions of superficial oxidation, in the ...
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 …
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 …
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%.
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 …
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 …
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 …
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 …
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 …
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 …
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 ...
2. The Extraction Processes of Gold-Pyrite Ore. The treatment principle of gold-pyrite ore is to separate the sulfide from the gangue and dissolve the gold in the …
Pyrrhotite floats best in acid circuits. The pH range for flotation for gold sulfide ores containing pyrite and arsenopyrite is generally between 7 and 9. Flotation …
Ore flotation results indicate that H 2 O 2 has the best selectivity for the As-S separation. When H 2 O 2 is used, the As content in pyrite concentrate decreases from 2.27% without addition of H 2 O 2 to 1.11% with H 2 O 2 dosage of 900 g/t, and the pyrite recovery is still high (86.58%). NaClO, KMnO 4, and K 2 Cr 2 O 7 have
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 …
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 …
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. Producing a pyrite concentrate with associated gold maximizes gold recovery.
Disodium carboxymethyl trithiocarbonate (D8) is an effective depressant for the flotation separation of stibnite and pyrite, but its inhibitory mechanism is still unclear. Hence, in this study, the flotation separation performance and inhibition mechanism of D8 were investigated through micro-flotation experiment, contact angle, infrared …
pyrite using a novel flotation reagent scheme: Insight from first-principles calculations LUO Yuan-jia ... (PGA) as the inhibitor was innovatively proposed and applied to separate copper-gold sulfide ore and pyrite in Hubei Province, China. In laboratory experiments, this new reagent system achieved a substantially better separation of ...
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 …
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 …
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 …
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 ...
Request PDF | The flotation separation of sphalerite from pyrite through a novel flotation reagent system of FeCl3-CuSO4-aminotriazolethione | To reduce the consumption of lime in mineral ...
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 …
DOI: 10.1016/S0301-7516(97)00018-5 Corpus ID: 98674614; Selective flotation of gold from pyrite under oxidizing conditions @article{Monte1997SelectiveFO, title={Selective flotation of gold from pyrite under oxidizing conditions}, author={Marisa Bezerra de Mello Monte and Fernando Antonio Freitas Lins and Jose F. L. de Oliveira}, …
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 …
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 …
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 …
