When pure zinc oxide was added alone, the Zn leaching rate reached , which was 7% higher than that of SZO Lead oxide was added to pure zinc oxide, and the Zn leaching rate decreased by 0.4% compared to pure zinc oxide. When adding ferrous oxide to pure zinc oxide, the Zn leaching rate decreased by 1% compared to pure zinc oxide.
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The recovery of zinc from a flotation tailing using 17-different leaching agents, including inorganic and organic acids, alkaline solutions and chelating agents, was investigated. ... The beneficiation of lead–zinc oxide ores using flotation is rather hard compared to sulfides as oxides can dissolve and their surfaces become hydrated easily ...
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Flotation of the zinc oxide minerals smithsonite, ... However, unlike to lead flotation, the grade and recovery of zinc concentrates reduced slightly. As can be seen, the Pb and Zn grades of the tailings were high and varied between 4.03–4.79% Pb and 7.89–8.08% Zn. Replacing sodium sulfide with sodium metabisulfite did not yield any better ...
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It is generally known that oxidized minerals of lead, zinc and copper are more difficult to float than their sulfide counterparts. This fact is due to the higher solubilities of oxide minerals as well as the extensive hydration of oxide surfaces (Fuerstenau et al., 1987; Fuerstenau et al., 1985a).Therefore, oxidized lead minerals are frequently treated with sulfidizing agents …
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Zinc oxide minerals (primarily smithsonite and hemimorphite) are important sources of Zn. Flotation is the most widely used method of enriching zinc oxide minerals for mineral processing. Chelating reagents have received extensive attention for the flotation of zinc oxide ores because of their high selectivity and stability. This paper systematically summarizes …
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Conclusion The following conclusions were made as a result of this experimental study carried on lead-zinc flotation tailing: 1) Zinc oxide from the flotation tailings of mixed oxidesulfide lead-zinc ore was successfully recovered by direct hydrometallurgical route and heat treatment when Zn dissolution efficiency was considered. 83.1% Zn and ...
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Froth flotation is the most popular method for the recovery of zinc oxide minerals. However, easy to slime, complex composition, high solubility, and reagent control difficulty …
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In this study, a flotation tailing from Wulagen zinc mine in China (Zn grade < 1%) was processed using froth flotation with combinations of amines (OPA 10, OPA 1214, OPA 13, DDA) and Na2S to study the effects of these amines on the zinc recovery as well as their interactions with other reagents, aiming to screen out a proper reagent scheme ...
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The valuable metals copper and zinc were successfully recovered from a water-quenched lead smelting slag containing zinc in Gansu Province. This study focuses on the application of the direct reduction roasting-flotation process for extracting these metals from the slag phase. To comprehend the recovery principle of copper and zinc minerals in the slag …
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In this study, based on the experimental results obtained from the bench-scale laboratory studies, the selection of acid type for the recovery of zinc from a flotation tailing was investigated using the analytic hierarchy process (AHP). The utilization of AHP was supported by the use of ExpertChoice® 2000 software.
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Flotation of the low-grade zinc oxide ore was achieved after surface modification by sulfidation and reduction at high temperature. A flotation concentrate containing 32.1% Zn and …
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In practice, the commonly used method for the recovery of oxidized lead and zinc minerals from ores at present is flota-tion (Onal G. et al., 2005). The flotation of oxidized lead and zinc …
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The dosage of flotation reagents significantly affects the recovery rate and concentrate grade of zinc oxide. Through a series of experiments, we have determined the …
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The flotation of smithsonite from tailing which comes from the cerussite flotation circuit was investigated using Armac C and Armac T as amine collectors. The results indicated that the dosage of sodium sulfide, collector type, and desliming are the main affecting factors on the Zn grade and recovery of smithsonite flotation concentrate.
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The aim of this study is to investigate whether flotation recovery of Zn-Pb oxide minerals is possible with other than amines collectors, which do not require costly and troublesome sulphidation ...
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Within this framework, as the primary zinc sources are steadily becoming depleted, there is a clear recognition that the recovery of zinc from zinc flotation tailings is a viable alternative to supply the increasing needs of the industrial sector (Navidi Kashani and Rashchi, 2008).Presently, there is a growing discussion on recovering zinc from low-grade oxidized zinc tailings, which …
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Lab-scale experiments results show that the new process contributed to the flotation of the complex mixed sulfide-oxide lead and zinc ore regarding two aspects: (1) High alkaline process (pH=12± ...
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With the depletion of natural mineral resources, secondary resources such as zinc leaching residue (ZLR) should be processed to recover valuable metals. In this study, flotation recovery of lead (anglesite) in ZLR from a zinc smelting plant was investigated, and the mechanism studied by using Fourier-transform infrared (FTIR) spectroscopy measurements. …
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Copper-lead-zinc mixed ore in Tibet, China, is a complex and refractory polymetallic ore resource; thus, ascertaining its mineralogical properties is very important for comprehensive recovery of ...
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The sulphidisation method was patented in the early days of flotation to allow the flotation recovery of base-metal "oxide" minerals that weren't amenable to the more recently developed sulphide mineral flotation method. It is the conventional technique used for the flotation of oxidised ores with xanthates (Elizondo-Álvarez et al., 2020 ...
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For zinc-oxide ores, there is often no selectivity in terms of zinc recovery, and the flotation of oxidized zinc minerals is usually much more difficult than the flotation of corresponding sulfide ...
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A key factor of zinc recovery from the oxide–sulphide mixed ore is to realize the reduction volatilization of multiple zinc phases, specially ZnS. Download: Download high-res image (302KB ... High S content in the flotation products may reduce zinc recovery and a large amount of S entering the gas phase will lead to a high concentration of ...
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A new flowsheet was developed to recover the valuable minerals from oxide or oxide-sulfide ores of lead and zinc. The flowsheet consisted of flotation of sulfide minerals, desliming and ...
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Separating oxidized zinc minerals from flotation tailings is always a challenge. In this study, a flotation tailing from Wulagen zinc mine in China (Zn grade < 1%) was processed using froth …
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The sulfidization-amine flotation method is commonly used for the beneficiation of zinc oxide ores. Lanping zinc oxide ores contains 8.40% zinc, with the main mineral being smithsonite; additionally, they have a high mud content. Conventional sulfidization–ammonium flotation presents a low flotation index and unsatisfactory flotation froth. A new open-circuit …
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To increase zinc recovery in the concentrate, this investigation performed mineralogical characterization, dispersion studies, bench and pilot-scale flotation experiments and an industrial flotation trial.
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The recovery of lead from zinc leach residues (as PbSO 4) by flotation is of interest in the zinc plants. Therefore, at the first stage of the present study, anglesite flotation behavior and its surface characteristics have been investigated. ... Keywords: Oxide ores; Flotation collectors; Waste processing; Froth flotation; Mineral processing 1 ...
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The sulfidization-amine flotation method is commonly used for the beneficiation of zinc oxide ores. Lanping zinc oxide ores contains 8.40% zinc, with the main mineral being smithsonite ...
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to recover the zinc oxide minerals such as smithsonite, hemimorphite and calamine via froth flotation method (Rey, 1953; Nagano et al., 1974; Kiersznicki et al., 1981; Hos-seini and Forssberg, 2006; Irannajad et al, 2009; Ejtemaei et al, 2011). Flotation using chelating agents is another alternative for beneficiation of zinc oxide minerals (Rinelli
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Flotation of zinc oxide ore using cationic and cationic-anionic mixed collectors 155 Conclusion From two amine collectors used in this study, Armac T acts a little more selectively than Armac C and results in smithsonite concentrate with higher Zn grade while Armac C is effective in enhancing the recovery of Zn.
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Oxide lead–zinc ore sample containing 10.17% Pb, 10.98% Zn, 57 g/t Ag and 164 g/t Cd was subjected to this experimental study and taken from Kayseri located in the foothills of the Aladağ Mountains, Turkey.Preliminary flotation tests with the ore sample indicated that there was no selectivity in terms of zinc recovery; therefore studies were concentrated on producing …
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The hydrometallurgical route of zinc hydroxide and synthesis of nanocrystalline ZnO is a particularly attractive method to recover oxidized lead and zinc from lead-zinc flotation tailings.
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The hydrometallurgical route of zinc oxide is primarily based on zinc hydroxide or basic zinc carbonate [5, 6]. The common recovery method of oxidized lead and zinc minerals from lead-zinc ores at ...
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