This investigation advances a novel mechanism for comprehending the impact of the surface dissolution processes on the flotation behaviour of smithsonite of …

The Flotation Separation Mechanism of Smithsonite from Calcite and Dolomite with Combined Collectors. by. Xiangxiang Chen. 1,2,†, Junzhi Bai. 3,†, …

The flotation recovery of smithsonite as a function of ODA dosage at various dissolved oxygen concentrations at pH 9.5 using 5 × 10 −4 mol/L Na 2 S as the sulfidization agent is presented in Fig. 2.Without sulfidization, even if a large amount of collector was added, the recovery of smithsonite was still less than 45 %, which …

Microflotation studies. Fig. 1 shows the flotation recoveries of smithsonite, calcite and quartz as a function of pH with 500 g/t Armac C and oleate collectors. The flotation of smithsonite with Armac C commences at pH 8. A rise in pH from 8 to 11.5 improves flotation and at an optimum pH of about 11 smithsonite recovery is 82%.

An example of industrial production is the flotation of bastnaesite from Mountain Pass ores. 61 In a flotation experiment of bastnaesite using sodium oleate, the maximum floatability occurred at pH 9, 73 while another study reported that the optimum pH value ranged from 4 to 8. 74 These different results may be due to differences in the …

The results show that KD-1 can significantly improve the separation effect during reverse flotation. When the dosage of KD-1 is 1500 g/t, the amount of collector can be saved, and the...

In this study, we systematically investigated the effect of Pb 2+ on the surface hydrophobicity and flotation behavior of sulfidized smithsonite in xanthate flotation. The smithsonite floatability was enhanced when Pb 2+ was present in the pulp after sulfidization, and the flotation recovery increased from 50.05% to 82.88%.

Flotation reagents are significant for modifying the interfacial characteristics of mineral grains to achieve the effective separation of minerals. Since the 1960s, when quantum chemistry was first introduced into the study of flotation reagents, many achievements have been made, although some controversial topics remain. The …

The adsorption of cupferron on the surface of smithsonite and calcite was determined using a UV 2600 analyzer (Shimadzu, Japan). The standard curve of the cupferron solution is shown in Fig. 3.The solution to be tested was prepared in accordance with the following steps: 2 g of mineral sample was added into the flotation cell together …

Flotation results using oleic acid revealed that the maximum recovery of 90% occurs at pH 9 and 500 g/t oleic acid. Also, the quartz and calcite recoveries reached 26% and 87%, respectively, in ...

With the exhaustion of zinc sulfide resources, nonsulfide deposits are increasing in economic importance. Smithsonite is a typical nonsulfide zinc mineral, commonly referred to as "zinc oxide" mineral [1,2,3,4].Many flotation methods employed for recovering zinc oxide minerals have been studied and applied, which involves pre …

Micro-flotation experiment results show that smithsonite starts floating after treatment with a low S concentration of 5 × 10 ⁻⁵ mol/L, while excellent flotation was obtained following ...

The surface modification of smithsonite with Pb ions is an effective method to improve the sulfidization-xanthate flotation process. In the present study, NH3·H2O was employed to enhance Pb ion ...

The mechanism and flotation performance of HAA during smithsonite flotation was investigated by total organic carbon (TOC) content studies, zeta potential measurements, Fourier-transform infrared ...

Fig. 2 shows the flotation recovery of smithsonite as a function of NaIX concentration in the absence or presence of different sodium sulfosalicylate concentrations using 1920 g/t Na 2 S·9H 2 O as a sulfidizing agent. The flotation recovery of smithsonite with 1920 g/t Na 2 S·9H 2 O as a sulfidizing agent was 17.39% at 29.76 g/t NaIX …

Under weak alkaline conditions, the flotation recovery of smithsonite was elevated from 36.7 % to 95.7 % with the presence of Trp (1.5 mol/L), achieving the best activation effect on smithsonite flotation. Mechanism studies revealed that amino acids reacted vigorously with Zn atoms on the surface of smithsonite with a reaction energy of −498. ...

Effectively strengthening the surface sulfidation is essential for recovering hemimorphite by froth flotation. In this work, inductively coupled plasma optical emission spectrometer (ICP-OES) measurements, Visual MINTEQ calculation, X-ray photoelectron spectroscopy (XPS) analysis, time of flight secondary ion mass spectrometry (ToF-SIMS) …

At the mixture ratio of Armac C:Armac T, 1:6, the collectors' consumption are decreased significantly and an optimal concentrate with 94.4% recovery and 42.3% Zn grade is …

Shi and co-workers [20] used anionic collector for flotation of smithsonite. According to their results, smithsonite showed high floatability using sodium oleate as collector between pH 7.0 and 8.0. By increasing pH, smithsonite flotation recovery decreased from 80% to about 30% at pH 9.5 [20].

Beneficiation of zinc from low-grade oxidized zinc ores has become the focus of recent studies. Sulfidation is an important process to recover zinc from oxidized zinc ores in flotation.Although some studies have reported on the sulfidation-flotation of smithsonite, the effect of sulfide ions on sulfide film thickness remains unknown when …

... Their small hydration ion radius enables them to act on the surface of smithsonite. Many researchers have studied the effect of Ca 2+ on the flotation of …

All tested amino acids including Trp, Phe, Gly, Ser, and Leu significantly improved the floatability of smithsonite. Under weak alkaline conditions, the flotation recovery of smithsonite was elevated from 36.7 % to 95.7 % with the presence of Trp (1.5 mol/L), achieving the best activation effect on smithsonite flotation. Mechanism studies

Although azurite is one of the most important copper oxide minerals, the recovery of this mineral via sulfidization-xanthate flotation is typically unsatisfactory. The present work demonstrated the enhanced sulfidization of azurite surfaces using ammonia phosphate ((NH4)3PO4) together with Na2S, based on micro-flotation experiments, …

Flotation Study of Smithsonite. The results with addition of ethylenediamine as activator on micro-flotation recovery rate of smithsonite was given in Fig. 2.It showed that the optimum concentration of ethylenediamine was 6 × 10 −3 mol/L, and the corresponding recovery rate was 91.07% with dodecylamine-hydrochloride being …

Flotation of smithsonite from tailing coming from a cerussite flotation circuit was investigated using Armac C and Armac T as alkyl amine acetate collectors.

Therefore, a sulfidization model involving coordination and flotation medium is needed to be considered to reflect the real process of cerussite flotation. In present study, basing on the coordination chemistry of mineral flotation, the sulfidization model of a PbS film forming on PbCO 3 surface was established using the density functional ...

•. A new component (PbS) formed on the smithsonite surface after lead ion activation. •. The formation of PbS promotes sodium butyl xanthate adsorption. •. Lead …

1. Introduction. Smithsonite (ZnCO 3) is one of the major sources of zinc oxide.As the primary source of zinc, sphalerite is steadily getting depleted. To meet the future zinc market demand, it is significant to process low grade oxidized zinc ores for a marketable product (Ejtemaei et al., 2011, Irannajad et al., 2009, Kashani and Rashchi, …

In this study, guar gum was successfully employed as depressant for calcite during the smithsonite flotation, and its function mechanism were studied by micro flotation, and X-ray photoelectron ...

The pure mineral micro-flotation experiment of the two minerals showed that the flotation recovery of smithsonite reached 92%, with the recovery of dolomite less than 20% when the NaOL/BHA molar ratio was set to be 2:1 [15]. However, with the further exploitation and exhaustion of resources, the difficulty of flotation brought by gangue ...