This study aims to synthesize nanoparticle collectors (NPCs) by emulsion polymerization to improve the abovesaid flotation desulfurization process. The …

Pilot-scale flotation tests were performed to evaluate the industrial separation feasibility of residue with ultrasonic pretreatment under continuous feed conditions. The flotation process is shown in Fig. 10, and the results are summarized in Table 7. Separation with ultrasonic pretreatment produced a sulfur concentrate assaying of 93.87 …

Vo1. 2, Characterization and Flotation of Sulfur from Chalcopyrite Concentrate Leaching 7 A sodium silicate dosage of 50 g/t increases the sulfur grade of the concentrate to 89% with a recovery of 91%. The grade of both copper and siliceous material has been reduced significantly, indicating a lesser amount of chalcopyrite and siliceous ...

One method for separating the elemental sulfur from the residue is to employ the hot flotation process to float the elemental sulfur (Faraz et al., 2014; Halfyard and Hawboldt, 2011; Liu et al., 2016; Sun et al., 2021; Wang et al., 2019). The addition of this flotation step adds to the cost of the sulfur removal process and the residues with ...

The characterization of the whole oxidation layer from the outmost part to deeper layers is therefore important to fully appreciate the influence of pyrite surface chemistry on the flotation performances. ... ore containing silver increases the efficiency of cyanidation by decreasing elemental sulfur content and by exposing sulfide surfaces ...

Zhang studied the flotation performance of a collophanite ore by employing sulfur–phosphorus mixed acid as a depressant, and found that the sulfur–phosphorus mixed acid could depress the apatite effectively; a concentrate with P 2 O 5 content of 28.4% and a corresponding recovery of 85% was obtained.

Introduction. Frash process, a solution mining method operated at an elevated temperature and pressure, has been the major process for producing elemental sulfur in the United States for many...

The flotation desulfurization process is simpler, less investment and higher utilization of resources. Therefore, flotation process is more suitable for high-sulfur bauxite desulfurization . In this study, the high-sulfur bauxite was used as raw materials and the flotation was applied to separating sulfur minerals from bauxite.

The complexity of the sulfur reduction to polysulfides indicates that a better understanding of the mechanism still needs more detailed characterization and studies. Due to the close Gibbs free energies, various polysulfide …

This study aimed to evaluate the feasibility of enhanced desulfurizing flotation of high sulfur coal via the sonoelectrochemical method. In the − 0.076 mm coal, optimal conditions include an anhydrous ethanol concentration of 2.1 mol/L, a sonoelectrolytic time of 20 min, current density at 15 × 10 −3 A/cm 2, and ultrasonic intensity at 1.2 ...

Read this article. Effective desulfurization of high-sulfur bauxite is one of the major problems in the alumina production industry. To overcome this, a novel …

Elemental sulfur produced by chloride leaching of sulfide ores or concentrates contains selenium and tellurium usually too high to be used in various industrial or agricultural uses. The sulfur in the leaching residue can be upgraded to 90% in grade by froth flotation and the sulfur concentration can be followed by sulfur purification and selenium and …

The main objective of this research is to upgrade the heating value of coal from the Achibo-Sombo-Dabaso area by minimizing the ash and sulfur content using froth flotation techniques, applying diesel oil as a collector and n-octanol as frother reagents. The selection of this reagent is based on the viscosity, low cost and high molecular …

In this study, a novel collector of sulfur-containing ionic liquid (SCIL) was synthesized by the inorganic anion (isobutyl xanthic acid) and organic cation (N-tetrabutyl quaternary ammonium salt) and it was used to remove pyrrhotite from magnetite by reverse flotation at the first time. The collecting performance of SCIL was studied by ...

Sulfur nanoparticles are very important application for anticancer, antibacterial, fertilizers, pharmaceuticals, fiber industries, modification of carbon nano tubes and synthesis of nano ...

Surface Characterization of Concentrated Jamesonite, in the Collectorless Flotation, in Acid, Neutral, and Alkaline Medium Download book PDF. ... in metal, on the surface of the particles, when it has a potential lower than + 80 mV and pH of 6.86. For example, sulfur is passivated at a potential from + 80 mV to + 470 mV, ...

Characterization and Flotation of Sulfur from Chalcopyrite Concentrate Leaching Residue. H. K. Lin. Mineral Industry Research Laboratory University of Alaska Fairbanks, …

The sieves production with the particle fraction of −74 + 38 μm was used in micro-flotation experiments and sulfur ions adsorption experiments,and the fraction finer than 5 μm was used in zeta potential measurement and XPS analysis. ... Furthermore, the characterization of sulfur-rich surface on smithsonite was determined by Na 2 S ...

This study was carried out with one of the physiochemical techniques of coal sample beneficiation using froth flotation technique for upgrading the quality of Achibo-Sombo-Dabaso coal, southwestern Ethiopia. ... The proximate and ultimate characterization studies show that the raw coal samples contain 11.81-20.27% …

This work successfully revealed the interfacial adsorption mechanism of DDTC on the four mineral phases in high-sulfur residue flotation using DFT calculation, interfacial characterization, and on-line …

The investigated result of sulfur content in raw coal samples is The fixed carbon for the treated coal samples obtained after benefi- ranging from 0.67% to 1.18% but after treatments, the sulfur content is ciation experiments is in the range of 44.47%–55.87% as shown in reduced to a range of 0.25%–0.33% as shown in Table 2.

Under the closed-circuit flotation flowsheet of "one roughing-two cleaning-three scavenging", aluminum concentrate with a yield of 85.91% and sulfur content of 0.56% were obtained using a ...

The fundamental aspects of the flotation of sulphide minerals both in the absence and presence of thiol collectors are discussed in relation to their crystal structure, surface …

Nowadays, the common reverse flotation collector in desulfurization of high-sulfur bauxite is xanthate, but it has unstable chemical properties, weak selectivity and some neurotoxicity[6]. In addition, it will decompose under acidic conditions, so the pulp pH needs to be adjusted to alkaline during xanthate desulfurization, which will produce a ...

ABSTRACT Effective desulfurization of high-sulfur bauxite is one of the major problems in the alumina production industry. To overcome this, a novel nanoparticle collector (NC) to improve the desulfurization performance during flotation process was synthesized via emulsion polymerization method, whereby lignin (natural polymer) was …

Mineral processing played only a small role in the elemental sulfur industry. When a sulfur ore was selected, a typical method was grinding the sulfur ore to about 28 mesh followed by froth flotation.

Bauxite is one of the main raw materials in the alumina industry. Fine high-sulfur bauxite flotation desulfurization is a great challenge presently. This study aims to synthesize nanoparticle collectors (NPCs) by emulsion polymerization to improve the abovesaid flotation desulfurization process. The physicochemical properties of high …

Diethyldithiocarbamate (DDTC) is employed in the sulfide ore flotation process due to its excellent collection performance. Herein, we investigated the interfacial adsorption behavior of DDTC on the four …

flotation schemes to process high-grade, coarse-grained ores. Because of the depletion of these easy-to-process ... chemically classified as sulphur-deficient and sulphur­ ... Characterization of oxidized sulphide surfaces has been undertaken to identify the chemical nature of the oxidation products. Electrochemical techniques,

Under optimized conditions of ultrasonic power, ultrasonic treatment time and solid weight, pilot-scale flotation produced a concentrate that the sulfur grade and …