Flotation Gangue Molybdenite

6 on the basal surface, and the presence of these micro-edges leads to the local hydrophilicity of molybdenite basal surface. Fig. 3. Diagram of crystal structure of molybdenite (2H polytype) (a ...

In the flotation of sulfide minerals, the separation of molybdenite and talc is a difficult problem. Talc is the main gangue mineral of molybdenite, it has good natural hydrophobicity and a ...

In the flotation of copper sulphides and molybdenite in the first circuit, pyrite as a sulphide gangue mineral has to be depressed and lime is added to increase flotation pH to depress pyrite when fresh water is used. ... Molybdenite flotation depends on the hydrophobic faces on which diesel adsorbs (Castro et al., 2016, ...

The flotation separation of fine-grained molybdenite from gangue minerals is always difficult due to the low efficiency of capturing fine particle by bubbles and the heterogeneous agglomeration ...

Similar to what has been shown in this present work on the depression of gangue, an investigation into the role of Ca 2+ ions on the surface properties of molybdenite in copper porphyries by Li et al. (2015) showed that …

All of the experimental results suggest that humic acids can be employed as a selective depressant for molybdenite during the flotation separation of molybdenite and talc under alkaline conditions ...

In particular, in the presence of many different kinds of silicate gangue in minerals, sodium silicate performs better than sodium carbonate in inhibiting gangue formation by flotation. ... Moreover, the molybdenite flotation recovery remained at a high level (above 86.5%) when the dosage of zinc sulfate was increased from 100 to 1600 mg/L. The ...

It is believed that the outcomes of this work could facilitate the optimization of fluidized-bed flotation in coarse gangue rejecting for sulfide ores. ... This study carried out fluidized-bed flotation of molybdenite ores under three particle size fractions and three bubble sizes, respectively. The effect of surface mineral exposure pattern ...

In industrial production, we always hope that we can flotation sulfide minerals such as molybdenite and inhibit gangue minerals such as talc. Therefore, an effective inhibitor is needed for the selective flotation separation of molybdenite from talc Artemisia sphaerocephala Krasch gum (ASKG) is a kind of colloid extracted from artemisia ...

Molybdenite (MoS2), a major resource for Mo, is often associated with some gangue minerals, such as kaolinite and quartz. The flotation separation of fine-grained molybdenite from gangue minerals ...

Similar to what has been shown in this present work on the depression of gangue, an investigation into the role of Ca2+ ions on the surface properties of molybdenite in copper porphyries by Li et al. (2015) showed that the floatability of fine molybdenite particles decreased significantly when Ca2+ ions and silica coexisted in the flotation pulp.

Talc is one of the most problematic gangue minerals for molybdenite flotation owing to its strong natural hydrophobicity. In this work, pullulan polysaccharide (PU) was evaluated as a potential ...

Talc is one of the most problematic gangue minerals for molybdenite flotation owing to its strong natural hydrophobicity. In this work, pullulan polysaccharide (PU) was evaluated as a potential depressant in the flotation separation of molybdenite from talc. Bench flotation tests of single mineral samples and multi-mineral samples were carried ...

In this study, the metallurgical performance of typical copper sulfide minerals, molybdenite as well as gangue minerals (e.g., pyrite, tennantite, and enargite) under different pH and Eh ...

Evaluation of Collectors for Molybdenite Flotation. Most primary-molybdenite producers use a selective-flotation process in which molybdenite is floated from the ore while other sulfide and non-sulfide gangue minerals are …

An important approach to achieve the effective recovery of poor floatability molybdenite is by exploring appropriate alternative collectors. Lu et al. investigated the adsorption of various divalent cations on the surface of molybdenite, providing a reliable theoretical basis for molybdenite flotation [22].Li et al. found that coal tar and dodecane (CTD) could effectively …

In order to separate the gangue minerals and impurities with the molybdenite, the Hallimond tube flotation was conducted under the condition of natural pH, kerosene 10 mg/L, MIBC dosage 10 mg/L, and flotation for 3 min using the sample produced by the pressurized water leaching. The results are shown in Figs. 7 and 8.

This molybdenum flotation circuit, based on 250-500 tons per 24 hours is designed for low-grade molybdenum ore having high-grade streaks and with pyrite-quartz gangue.It is also basically sound for many other friable sulphide ores, such as antimony, silver and even some lead ores. The basic ideas stressed in this moly flotation flowsheet are the importance of simplicity …

The standard flow sheet consists of bulk sulphide flotation of copper and molybdenite while depressing gangue and iron minerals in the rougher and cleaner circuits. Recovery of copper is by standard flotation reagents identified …

In this study, the metallurgical performance of typical copper sulfide minerals, molybdenite as well as gangue minerals (e.g., pyrite, tennantite, and enargite) under different pH and Eh ...

Froth flotation, a separation and concentration process based on the difference in the physicochemical properties of minerals to realize the selective separation of valuable minerals from gangue minerals, is deemed the most efficient and common recovery technology for most mineral resources [1], [2], [3].With the gradual improvement of production techniques for …

minerals Article The Interaction between Ca2+ and Molybdenite Edges and Its Effect on Molybdenum Flotation He Wan 1,2,*, Wei Yang 1,*, Weicheng Cao 2, Tingshu He 1, Yanying Liu 2, Jianbo Yang 3, Lin Guo 3 and Yongjun Peng 4 1 College of Materials and Mineral Resources, Xi'an University of Architecture and Technology, Xi'an 710055, China; [email protected]

Copper-molybdenum porphyry ores often contain copper sulfide minerals, molybdenite, pyrite, iron oxides, and gangue minerals. Due to the differences in the flotation properties of sulfide minerals and associated gangues, flotation is the most common method for processing copper-molybdenum sulfide ores.

Over the past several decades, many studies have been carried out to separate the hydrophobic gangue mineral talc from molybdenite by froth flotation and other techniques.

Commonly, the selective separation of molybdenite from copper sulfide concentrates (mainly composed of chalcopyrite and chalcocite), is the second stage of a froth flotation process, where the copper and the molybdenum were collectively separated from the gangue in a first stage.

Cations like Ca 2+ and Mg 2+ are reported to have negative effects on the flotation of molybdenite in alkaline solution, and dispersants and oil collectors need to be added to restore the flotation of molybdenite. In addition, effects of gangue minerals, particle size, and oil collectors and surfactants on molybdenite recovery are also ...

In this study, the metallurgical performance of typical copper sulfide minerals, molybdenite as well as gangue minerals (e.g., pyrite, tennantite, and enargite) under different pH and Eh conditions of the flotation cell were investigated. ... (molybdenite flotation circuit) and as a result the generation of fine and very fine particles, has led ...

The beneficiation of porphyry copper ores is mostly achieved by a two-step flotation process; that is, (i) bulk flotation to recover Cu and molybdenum (Mo) minerals from gangue minerals and (ii ...

Over the past several decades, many studies have been carried out to separate the hydrophobic gangue mineral talc from molybdenite by froth flotation and other techniques.