It can be seen from the above flotation steps that the whole sulfidation-xanthate flotation process of smithsonite is complicated. ... In this work, the C 7 H 5 NaO 6 S⋅2H 2 O activation mechanism during the sulfidation-dodecylamine flotation of smithsonite was investigated.
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, …
It can be seen from the above flotation steps that the whole sulfidation-xanthate flotation process of smithsonite is complicated. ... Characterization of zinc sulfide species on smithsonite surfaces during sulfidation processing: Effect of ammonia liquor. Journal of Industrial and Engineering Chemistry, Volume 61, 2018, pp. 19-27.
The process consists of selective sulfidation in a multihearth fluidized bed reactor, product comminution and physical separation via froth flotation, and downstream gas handling and treatment via ...
A flotation test was performed using a conventional rougher flotation process to investigate the floatability of the treated sludge (Fig. 2). Download : Download full-size image; Fig. 2. ... The results revealed that the stabilization and detoxification of heavy metals occurred during sulfidation, which favors the disposal of the tailing after ...
The conventional sulfidation-xanthate flotation process that consists of sulfidization with sodium sulfide, activation by heavy-metal ions, and collection with xanthate is not sufficiently efficient for treating …
The sample with smithsonite and cerussite as the main valuable metal minerals is a carbonate-hosted lead-zinc ore in the current study. Hydrothermal …
However, due to grinding of the sulfide product before flotation, there was serious metal entrainment, leading to low recovery percentage of nickel (about 50%). Obviously, the sulfidation process of laterite ore needs to be further explored. Temperature is expected to have a very important effect on the sulfidation process of …
When sodium sulfosalicylate was added, a more negative zeta potential was obtained during sulfidation flotation from pH 8–12. Herein, we showed using DMOL-3 models that the addition of sodium sulfosalicylate ions catalyzed the formation of ZnS, and made the sulfidation process simple and efficient.
Surface sulfidation flotation has been extensively studied, including screening sulfurizing reagents, characterizing sulfide films on smithsonite surfaces and promoting the sulfidation process of ...
The total concentration and leaching rates (R 2) of heavy metals in FT were much lower than those in NS, demonstrating that the hydrothermal sulfidation–flotation process was able to effectively ...
The "Na 2 S-Pb (II)-xanthate" process can be successfully used for the flotation of hemimorphite, increasing the recovery rate from 40% to 90%. PbS is generated when an ion exchange mechanism ...
In this paper, the effects of sodium sulfosalicylate on hemimorphite activation were studied. Sulfosalicylic acid ions enhanced the sulfidation-flotation process, which increased the flotation ...
Zheng et al. 33 employed sulfidation roasting and flotation process to recycle valuable metals from zinc leaching residues. The …
Combined with the flotation results, FTIR, Zeta potential, and XPS results, a schematic model is proposed in Fig. 7 to illustrate the effect of the vulcanization flotation process of smithsonite. During the vulcanization process using sodium thiocyanate, a layer of zinc sulfide precipitates on the surface of the zinc ore, thereby facilitating ...
Zheng et al. 28,29,30 employed sulfidation roasting and flotation process to recycle valuable metals from lead smelter slag and zinc leaching residues. The experimental results of zinc leaching ...
Among these, flotation is a highly efficient, important, and widely used method for the pretreatment of oxidized zinc ore during industrial production due to its low cost [2], [7]. In industrial flotation, oxidized zinc ore is processed by sulfidation followed by flotation with an amine or xanthate collector [2], [8].
The sulfidation process can directly influence the flotation separation efficiency of the smithsonite [12], [13]. Thus, it is very important to investigate the sulfidation process of smithsonite for enhancing its flotation recovery. Sodium sulfide (Na 2 S) is the most commonly sulfurizing agent applied to smithsonite flotation.
The effect of the addition of ammonium salt on the pH value and flotation effect when the dosage of NaBX is 1 × 10 −3 mol/L under different flotation conditions is shown in Table 1.The results showed that the pH value of the solution system during 7, and the best flotation efficiency was 51.36%, which is not conducive to the flotation of malachite in …
Yuan et al. suggested that mechanochemical sulfidation and flotation process might be used to recover lead from various kinds of leaded glass wastes, ... so that a liquid phase can be formed during the process. In fact, lead smelter slag was a high temperature solid–liquid mixture with good liquidity, when it was generated from lead …
This process is referred to as "sputtering" through the generation of negative and positive ions along with neutral fragments that are removed from the surface material [42]. TOF-SIMS is best suited for the analysis of surface materials. ... Lead ions significantly improve smithsonite recovery during sulfidation flotation. The depletion of ...
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 …
Therefore, the application of surface modifiers in improving the flotation recovery rate of copper oxide minerals during the sulfidation process is necessary. ... The catalytic sulfidation of CH 6 N 2 O 2 and Na 2 S·9H 2 O achieved a satisfactory sulfidation flotation of azurite. The surface topographical analyses revealed that the …
The sample with smithsonite and cerussite as the main valuable metal minerals is a carbonate-hosted lead-zinc ore in the current study. Hydrothermal sulfidation of oxidized zinc-lead ore was carried out with a particle size of 74 to 58 μm and the mole ratio of sulfur and zinc of 2.0 at 453 K (180 °C) for 240 minutes, and 73 pct zinc and 86 …
The sulfuration pretreatment is essential in enhancing the floatability of zinc oxide ore during the flotation process. The conventional vulcanizing agent employed in the sulfuration process, however, has proven to be ineffective and environmentally unfriendly. ... Behavior and effect of calcium during hydrothermal sulfidation and flotation of ...
These findings can provide theoretical support for improving the process during which the zinc recovery from refractory zinc oxide ores is achieved by xanthate flotation. ... Induced crystallization of Pb2+ on smithsonite surface during sulfidation-xanthate flotation. 2022, Colloids and Surfaces A: Physicochemical and …
The process consists of selective sulfidation in a multihearth fluidized bed reactor, product comminution and physical separation via froth flotation, and …
