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The addition of calcium ions was conducive to the flotation separation of chalcopyrite from arsenopyrite under low-alkalinity conditions, and the flotation recovery of arsenopyrite with the addition of 1 × 10 −2 mol/L calcium ions at pH 9 decreased to 47.72% while the recovery of chalcopyrite remained above 94%. 2)
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Floatability of arsenopyrite as a function of initial concentration of sodium isopropyl xanthate at various pH values. Recovery of arsenic as a function of pH in flotation of an arsenopyrite ore assaying 12.5% As (27.2% FeAsS) using 30 and 60 g/ ton sodium isopropyl xanthate and 70 g/ton frother.
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1. Introduction. Arsenic has toxicity and occurs mainly in the form of arsenopyrite in ore [1].It not only pollutes the atmosphere, but also causes health problems for humans and animals [2], [3].Especially during the separation of chalcopyrite, it is easily enriched in the concentrate and has a negative impact on the subsequent smelting [4], …
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The flotation separation efficiency of pyrite and arsenopyrite can be enhanced by low-temperature oxygen plasma pretreatment. In this study, the plasma modification …
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Only a few studies, to the best of our knowledge, focused on the separation of arsenopyrite and pyrite in an arsenopyrite-pyrite or an arsenopyrite-pyrite-quartz system.18,19) For example, Sirkeci (2000) carried out bench-scale flotation tests using hexyl thioethylamine as a collector in an arsenopyrite-pyrite-quartz system, and it was …
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A 2 kg/t hydrogen peroxide addition and 120 g/t PAX collector concentration gave the best separation efficiency with 63.1% pyrite and 5.1% arsenopyrite recovery into the flotation concentrate.
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Flotation experiments of chalcopyrite–arsenopyrite mixture were performed to demonstrate the selective separation of chalcopyrite from arsenopyrite using ferric chloride and ammonium chloride as depressant and activator, and the minerals were manually mixed in a 1:1 ratio as the flotation feed.
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DOI: 10.1016/S0301-7516(00)00023-5 Corpus ID: 97556968; The flotation separation of pyrite from arsenopyrite using hexyl thioethylamine as collector @article{Sirkeci2000TheFS, title={The flotation separation of pyrite from arsenopyrite using hexyl thioethylamine as collector}, author={Ayhan Ali Sirkeci}, …
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Semantic Scholar extracted view of "Insight into selective depression of sodium thioglycallate on arsenopyrite flotation: Adsorption mechanism and constructure" by Wenchao Dong et al. Skip to search form Skip to ... Low-Alkalinity flotation separation of antimony and arsenic minerals with modified polyacrylamide. Jiaqi Lu Wen-Juan Li +5 …
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At present, the most commonly used technology to separate copper-bearing ore from other ores is froth flotation (Liu et al. 2017), and separation of different ores is a common problem in flotation process.However, in the flotation separation of chalcopyrite and arsenopyrite, it is difficult to separate chalcopyrite and arsenopyrite because of …
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Flotation separation results of the pyrite–arsenopyrite artificial mixed minerals: (a) flotation separation of single-agent m-NBO pyrite and arsenopyrite concentrate; (b) …
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The arsenopyrite activated by copper ions have similar flotation properties to chalcopyrite. Polyaspartic acid (PASP) and calcium oxide (CaO) using as combination depressants for the selective separation of copper-activated arsenopyrite and chalcopyrite were carried out by micro-flotation experiments, contact angle measurements, surface …
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Currently, the depression of arsenopyrite during the flotation of base metal mineral sulfides is being continuously studied to reduce its presence in sulfide concentrates of …
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Separation of pyrite and arsenopyrite by flotation using xanthates presents difficulties due to the fact that xanthates adsorb onto both these minerals as dixanthogen, which is not cation selective. Therefore, a number of separation techniques have been employed by a number of authors to produce separate arsenopyrite and pyrite streams …
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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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ARSENOPYRITE SEPARATION FROM AURIFEROUS PYRITE BY SULPHONATE FLOTATION 151 Methyl isobutyl ketone, a frother, when added in the pulp, improved the flotation results. In this case, lower …
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To achieve the best separation, the pulp conditions were a pH of 8, 2.14 ·10 3 mol/l sodium ethyl xanthate and 250 mg/l of MAA depressant. These conditions resulted in an overall …
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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 …
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Four oxidants, NaClO, KMnO 4, K 2 Cr 2 O 7, and H 2 O 2, were used to promote the flotation separation of pyrite (FeS 2) from arsenopyrite (FeAsS). Ore flotation results …
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The selective action mechanism of sodium butyl xanthate (BX), ammonium salt (NH4+), and sodium m-nitrobenzoate (m-NBO) on pyrite and arsenopyrite was examined by experiments and quantum chemistry. The experiments show that under alkaline conditions, ammonium salt (NH4+) and m-NBO can have a strong inhibitory effect on arsenopyrite. …
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ABSTRACT. Four oxidants, NaClO, KMnO 4, K 2 Cr 2 O 7, and H 2 O 2, were used to promote the flotation separation of pyrite (FeS 2) from arsenopyrite (FeAsS).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 …
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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.
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The application of Fe³⁺ and NH4⁺ in the flotation separation of chalcopyrite and arsenopyrite were investigated by micro-flotation tests, infrared spectroscopy, local electrochemical ...
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2.2. Micro-flotation experiments. A small-scale mechanical agitation/flotation machine was used for the flotation experiments. The arsenopyrite sample (2 g) was mixed with deionized water (40 mL) and the pH was adjusted to the desired value by the addition of NaOH/H 2 SO 4, as measured by a pH meter (PHS-3C, …
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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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DOI: 10.1016/s1003-6326(22)66053-9 Corpus ID: 254318737; Interaction mechanism of ferrate(VI) with arsenopyrite surface and its effect on flotation separation of chalcopyrite from arsenopyrite
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The results showed no pyrite and arsenopyrite flotation at pH 11 until CuSO 4 (2.5 × 10 −5 ... the effect of calcium ions on surface properties of chalcopyrite and arsenopyrite and its response to flotation separation under low-alkalinity conditions were investigated by flotation tests, zeta potential measurements, solution chemistry ...
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The results showed that K2FeO4 strongly depressed arsenopyrite in a pH range of 4—11, and the flotation separation of chalcopyrite from arsenopyrite could be realized in the presence of 5×10 ...
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The aim of the study was to compare the effects and mechanism of tetrasodium pyrophosphate (TSPP) and sodium tripolyphosphate (STPP) as dispersants on the selective flotation of arsenopyrite from muscovite. The results of single-mineral flotation showed that the recovery of arsenopyrite was 81.4% when no dispersant was added. The …
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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 …
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The flotation separation of arsenopyrite from copper ores typically uses a mixture of sodium cyanide, lime, sodium hydrosulfide, sodium sulfite, and magnesiumammonium [4][5][6] [7]. However, there ...
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The flotation was performed for 2 min following a 5-min conditioning time for mineral–collector interaction. The floating and non-floating fractions were dewatered, dried and weighed for assessment. The flotation separation of arsenopyrite from pyrite was evaluated by two techniques, i.e. the Hallimond tube and bench flotation tests.
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The flotation separation and mechanism of dextrin on chalcopyrite and arsenopyrite surface were investigated using micro-flotation tests, zeta potential measurements, infrared spectroscopy, contact angle measurement and surface adsorption experiments. The micro-flotation test showed that dextrin had …
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DOI: 10.1016/j.seppur.2023.123155 Corpus ID: 255923356; Utilization of soluble starch as the depressant to flotation separation of pyrite from arsenopyrite @article{Ran2023UtilizationOS, title={Utilization of soluble starch as the depressant to flotation separation of pyrite from arsenopyrite}, author={Jincheng Ran and Yuepeng …
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DOI: 10.1016/J.SEPPUR.2019.04.007 Corpus ID: 132143489; Depression mechanism involving Fe3+ during arsenopyrite flotation @article{Yu2019DepressionMI, title={Depression mechanism involving Fe3+ during arsenopyrite flotation}, author={Li Yu and Quan Jun Liu and Shimei Li and Jiushuai Deng and Bin Luo and Hao Lai}, …
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