Highlights Blending limestone skarn and monzonite ores may result in flotation 'poisoning'. Near-pro-rata flotation response for the Cu containing minerals is observed. There is considerable depression of the formerly clean molybdenite from the MZ ore. Surface contamination by Ca, Fe, Mg-containing hydrophilic species is observed. There is transfer of …
The application of sodium hexametaphosphate in seawater flotation at high pH provides an alternative to inhibit precipitation on molybdenite, thereby enhancing flotation …
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 depressed in the same step. The process was developed at the Climax mill.
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.
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 ...
Flotation and contact angle tests validate that STG enhances the hydrophilicity of chalcopyrite surfaces, leading to an 83.79% flotation separation efficiency for molybdenite.
This paper reviews the surface chemistry and floatability of molybdenite, usually by-product in Cu/Mo sulfide ores. Oil collectors are used to improve molybdenite flotation …
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 ...
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 ...
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 ...
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 ...
Sodium metabisulfite (MBS) was used in this study for selective flotation of chalcopyrite and molybdenite. Microflotation tests of single and mixed minerals were performed to assess the floatability of chalcopyrite and molybdenite. The results of microflotation of single minerals showed that MBS treatment significantly depressed the floatability of chalcopyrite and …
Molybdenite flotation in the bulk copper/molybdenum flotation circuit at Kennecott Utah Copper was studied by means of a combination of plant metallurgical surveys, laboratory flotation tests ...
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 the floatability of fine molybdenite particles decreased significantly when Ca 2+ ions and silica coexisted in the flotation pulp.
However, there is little research on the flotation behaviors of silicate minerals in molybdenite beneficiation. As gangue minerals, the flotation of silicate minerals might be activated inadvertently, which needs to be …
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.
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. The copper and molybdenum processing plant at the Sungun complex-Iran were selected as a case study.
In the mixed minerals flotation, HA can effectively depress the flotation of molybdenite while not affecting the flotation of talc under strong alkaline condition (pH 11).
The study of the flotation of copper and molybdenite ores indicates that the recovery of molybdenite and copper flotation is reduced in the coarse, fine and very fine size …
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.
As a common gangue mineral with natural hydrophobicity, talc is normally found in nickel sulfide ores, molybdenite ores and copper oxide ores [1,2,3].In fact, when talc particles are crushed and ground as flotation feed, the basal surface accounts for about 90% of the total surface of talc particles, and the basal face is hydrophobic [4, 5], which does not have …
Molybdenite particles used for adsorption isotherms and flotation were purchased from Fluka (purum powder). The Brunauer–Emmett–Tellet (BET) surface area was measured at 3.1 m 2 g −1.Using a Malvern Instrument Mastersizer, the apparent particle size distribution of the particulate sample was distributed between 0.4 and 30.2 μm with the …
Gangue minerals like talc and kaolinite can depress the flotation of molybdenite because Mg and Ca ions dissolved from their surfaces can precipitate on molybdenite as hydrophilic colloids. To achieve the best recovery of molybdenite, an appropriate range of …
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 out to evaluate the …
Semantic Scholar extracted view of "Flotation separation of molybdenite and talc by xanthan gum" by Chunhui Zhong et al. ... Talc is a naturally hydrophobic gangue mineral in most sulfide ores. However, talc has vast applications in the cosmetics, paper, ...
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 …
Redox potential (Eh) control plays a significant role during sulfide mineral flotation by influencing the reactions on the surface of the minerals and accordingly the flotation behaviour. 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 ...
1. Introduction. Molybdenite (MoS 2) is the main source of molybdenum which plays a significant role in the modern society with its principal use as a ferro-alloy in iron and steel industries (Dutta and Lodhari, 2018).Molybdenite is often associated with copper sulfides such as chalcopyrite (CuFeS 2) and chalcocite (Cu 2 S). Conventionally, the beneficiation of copper …
Talc has long been a problematic gangue mineral in sulfide ore flotation due to its natural hydrophobicity. The as-investigated anionic depressants which reacted with the Mg sites on the edge plane of talc always exhibited limited effects because the negatively charged talc particle at pH > 5.0 showed electrostatic resistance for the anion adsorption.
The samples were taken from the molybdenite flotation circuit at the copper-molybdenum processing complex of Sungun. The flotation circuit of the plant consists of two 8-cell rows for the rougher flotation stage. ... In this study, the metallurgical performance of typical copper sulfide minerals, molybdenite as well as gangue minerals (e.g ...
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. However, the selective and efficient removal of talc from molybdenite concentrates remains a challenging issue, and the underlying mechanisms of depression are poorly understood.
The low and highly variable flotation recovery of molybdenum may be a result of several factors, all related to the properties of the molybdenite (MoS 2) mineral.Molybdenite crystal structure consists of hexagonal layers of molybdenum atoms between two layers of sulphur atoms (Fig. 2).Strong covalent bonds act within S–Mo–S layers, but only weak van der …
Generally, froth flotation is the most widely used approach to separate valuable minerals from gangue minerals due to their different floatability [8], [9], ... The bulk Cu-Mo concentrate used for the flotation separation of molybdenite from copper sulfides in bench-scale flotation experiments was supplied by China Molybdenum Co., Ltd.
