sulfidation process during flotation

    • Porphyry Copper Systems*

      2012-8-4 · Introduction PORPHYRY Cu systems are defined as large volumes (10−>100 km3) of hydrothermally altered rock centered on porphyry Cu stocks that may also contain skarn, carbonate-replacement, sediment-hosted, and high- and intermediate-sulfidation epi-thermal base and precious metal mineralization.

    • DETERMINATION OF THE CONTRIBUTIONS BY TRUE …

      2010-9-23 · AND ENTRAINMENT DURING THE FLOTATION PROCESS ABSTRACT by V.E. ROSS Senior Engineer Ore-dressing Division Mintek Private Bag X3015 RANDBURG 2125 SOUTH AFRICA A comparison is made of three methods for the determination of the contributions made by true flotation and the entrainment of mineral particles during the flotation process. ...

    • Sulfidation mechanism of ZnO roasted with pyrite ...

      2018-6-22 · Zheng et al. 33 employed sulfidation roasting and flotation process to recycle valuable metals from zinc leaching residues. The experimental results showed that a flotation concentrate with 39.13% ...

    • Hydrothermal Sulfidation and Flotation of Oxidized Zinc ...

      2014-2-11 · Hydrothermal sulfidation of oxidized zinc-lead ore was carried out with a particle size of 74 to 58 μ m 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 pct lead sulfidation fraction were achieved. Flotation of the unsulfided sample was ineffective, with less than 55 pct recovery of zinc ...

    • Low Sulphidation Epithermal Gold Deposits

      2015-7-23 · Low Sulphidation Epithermal Gold Deposits. Although they are a product of the same igneous system, low sulfidation epithermals gold deposits are very different from high sulfidation. In low sulfidation the main control for Gold deposition, is fluid …

    • Study on the sulfidation behavior of smithsonite | Request …

      During the sulfidation roasting process, pyrite was converted to loose and porous Fe3O4, whereas Zn2SiO4 was transformed into ZnS and SiO2 in situ. ... Sulfidation-flotation is commonly performed ...

    • Enhanced sulfidation xanthate flotation of malachite …

      2017-8-23 · The sulfidation process con- ... confirmed that ammonium ion can promote the sulfidation flotation of malachite based on flotation experiments. ... the solution system during 7, and the best ...

    • Effects of heating-sulfidation on the formation of zinc ...

      2021-8-1 · The process was performed at a Thermostatic Water Bath (HH-501) to control the sulfidation temperature for flotation. Subsequently, copper sulfate (2.0 × 10 −4 M) as activator and potassium isoamyl xanthate (2.0 × 10 −4 M) as collector were added successively at room temperature, and each reagent was conditioned for 3 min.

    • Flotation

      2016-1-11 · The FLOTATION PROCESS is one of the commonest methods of extracting the valuable minerals from certain classes of ores, and it is generally more efficient as regards the recovery of the minerals than any other process applicable to the …

    • Mechanochemical sulfidization of a mixed oxide-sulphide ...

      2019-6-28 · Also, the influence of sulfidization during the wet-milling process was examined on the separation efficiency and recovery of copper in detail. The results demonstrated that co-grinding with sulfur solely had the best flotation performance at the value of 0.5 wt.% and it was attributed to the possible existence of S-O bonding on copper oxides surfaces.

    • Metal Recovery from Sludge through the Combination of ...

      2012-1-1 · In addition, the sulfidation method has been employed for the recovery of heavy metals such as Cu, Pb and Zn from plating sludge and fly ashes [10-11]. Besides that this sulfidation process combined with flotation has been also studied for remediation of soil and sediments polluted with heavy metals such as Cd, Cu and Zn [12].

    • Sulfidation roasting of zinc leaching residue with pyrite …

      2020-5-10 · This study proposed a new process involving sulfidation roasting, magnetic separation and flotation to recover zinc and iron in ZLR. Through sulfidation roasting of ZLR with pyrite, zinc and iron were converted into ZnS and Fe3O4. The effects of pyrite dosage

    • Strengthening Sulfidation Flotation of Hemimorphite via ...

      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 hemimorphite, and the dosages of the sulfurizing reagent and metal ions are large. In this study, the sulfidation flotation (Pb2+ + Na2S + Pb2+ + xanthate) of hemimorphite was ...

    • Sulfidation mechanism of ZnO roasted with pyrite ...

      2018-6-22 · Zheng et al. 33 employed sulfidation roasting and flotation process to recycle valuable metals from zinc leaching residues. The experimental results showed that a flotation concentrate with 39.13% Zn, 6.93% Pb and 973.54 g/t Ag was obtained, and the recovery rates of Zn, Pb and Ag were 48.38%, 68.23% and 77.41%, respectively.

    • Sulfidation of Lead-Loaded Zeolite Microparticles and ...

      2019-5-26 · The possibility of recovering lead-loaded zeolite Y microparticles (PbY) by flotation after sulfidation was investigated using amyl xanthate (AMX) as the collector. The sulfidation process (by aqueous Na2S) was first studied as a function of the medium composition (Na2S concentration, pH), and the solid phases were characterized by various physicochemical techniques (X-ray photoelectron ...

    • Metal Recovery from Sludge through the Combination of ...

      2017-1-20 · sulfidation. For metal recovery, the synthetic metal sulfide can be enriched through subsequent flotation process. It is a novel way for the recovery of heavy metal from the sludge. In this study, the effects of liquid/solid ratio, mineralizer concentration, precursor concentration and dosage of sulfur on the sulfidation extent and floatation index

    • Sulfidation behavior and mechanism of zinc silicate ...

      Sulfosalicylic acid ions enhanced the sulfidation-flotation process, which increased the flotation recovery by 49.70%, and after lead ion assisted activation, the flotation recovery subsequently ...

    • Promotion of oxidation pretreatment on sulfidation of ...

      During the sulfidation process, the formation of copper disulfide and copper polysulfide is the key reason for facilitating the surface hydrophobicity (Feng et al., 2017). However, the floatability of copper oxide minerals would be depressed by the addition of excess sulfiding reagents ( Shen et al., 2019, Park et al., 2016, Han et al., 2021a ).

    • Characterization of sulfide film on smithsonite surface during …

      Flotation of sulfidation product . .... mal sulfidation procedure investigated in this u.s. Bureau of Mines ... flotation concentrate from the sulfidation product and. Read more Implementation of flotation and gravity separation, to process ...

    • Sulfidation behavior and mechanism of zinc silicate ...

      Sulfidation roasting followed by flotation is widely known as a possible generic technology for enriching valuable metals in low-grade Zn-Pb oxide ores. Zn 2 SiO 4 is the primary Zn phase in willemite. Zn 4 Si 2 O 7 (OH) 2 (H 2 O), the main Zn phase in hemimorphite, transforms into Zn2SiO4 at temperatures above 600 °C.

    • Enhanced sulfidation xanthate flotation of malachite using ...

      2017-5-18 · The sulfidation process converts the oxide mineral surface using Na 2 S, whereas the adsorption of S 2− with HS − ions on the oxide mineral surfaces generates a …

    • What is Sulfidation?

      2017-10-13 · Sulfidation is a chemical reaction, classified as type1 and type 2. Type 1 is caused at temperatures of 825°C to 950°C, and type 2 is caused at 700°C to 800°C. Generally sulfidation reactions occur on metals and alloys. Sulfur from airborne salts in some environments, and fuels in most cases, chemically react at high temperatures, with the ...

    • Characterization of sulfide film on smithsonite surface ...

      2019-6-1 · 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 the oxidized zinc ores start floating and achieve excellent flotation.

    • Sulfidation mechanism of cerussite in the presence of …

      2020-12-2 · LI et al [11] investigated the sulfidation roasting of a complex low-grade Pb-Zn oxide ore with sulphur. The results showed that the sulfidation extent of lead reached 98% under the optimum conditions. After flotation of the roasted ore, the flotation recovery of lead

    • Study on the sulfidation behavior of smithsonite

      Zinc extraction from low-grade mineral resources of oxidized zinc has recently become a focus of study. Sulfidation is an important process in oxidized ore flotation. In this study, the influence of sulfur ion adsorption on smithsonite surface was investigated with the use of zeta potential, inductively coupled plasma (ICP), scanning electron microscope (SEM), and X-ray photoelectron ...

    • Reaction behaviors of Pb and Zn sulfates during reduction ...

      2021-1-8 · To evaluate the feasibility of recovering Pb and Zn sulfides and Ag-containing minerals from Zn leaching residue by the process of reduction roasting followed by flotation, the reaction behaviors of Pb and Zn sulfates during this process were investigated.

    • Mechanism study on the sulfidation of ZnO with sulfur and ...

      2017-2-10 · 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 ...

    • The Behaviour of Gangue during the Flotation of a Sulfidic ...

      Mineral concentrators are becoming increasingly aware of the importance of the quality of water they feed into their milling and flotation circuits. It is speculated that different inorganic constituents of process water may yield different flotation results owing to electrolyte-reagent-mineral interactions occurring in the pulp phase. These interactions are said to be specific to ion type ...

    • Sulfidation behavior of ZnFe 2 O 4 roasted with pyrite ...

      The sulfidation products were zinc blende, wurtzite, magnetite and a fraction of zinc-bearing magnetite. These findings can provide theoretical support for controlling the process during which the recovery of Zn and Fe is achieved through the combined flotation-magnetic separation process.

    • (PDF) Quantitative evaluation of environmental risks of ...

      2013-3-26 · Floatation tailings (FT) are the main by-products of the hydrothermal sulfidation–flotation process. FT (FT1 and FT2) were obtained by treating two different neutralization sludges (NS) (NS1 and ...

    • Behavior and effect of calcium during hydrothermal ...

      2015-4-1 · During hydrothermal sulfidation and flotation of NS, the phase transition of calcium compounds might play a crucial role in the subsequent flotation for low metal recovery. During hydrothermal sulfidation, calcium minerals in NS were converted and further developed into bulk CaSO 4 crystals with many nano-ZnS crystals adhering on its surface.

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