Molybdenite is a natural mineral form of molybdenum disulfide (MoS 2) and the most important commercial source of molybdenum (Wills, 2011).Molybdenite exhibits a laminar crystalline structure (common 2H polytype) as shown in Fig. 1.As can be seen, the S Mo S layers are held together by weak van der Waals interactions and are capable of …

3 . 1. Introduction . The flotation separation of copper-molybdenum sulfides generally relies on the use of toxic and hazardous depressants such as cyanides, sodium sulfide/hydrosulfide, Noke's

The highest metallurgical and selective separation of Molybdenite from Mo-Cu concentrate were achieved at pH= 10.5 and ORP<-300 mV. Nitrogen aeration in the frothing stage caused that pulp potential became more reducing, resulting in decreasing Na2S consumption from 16kg/t to 6kg/t at a constant metallurgical efficiency in rougher flotation.

During the Cu–Mo ore flotation using an optimally dispersed microemulsion of the combined collector agent, a collective Cu–Mo concentrate was obtained with a …

It is difficult to separate chalcopyrite and molybdenite under natural conditions. Chalcopyrite and molybdenite can be separated efficiently by adding depressants in the pulp. In this paper, the depression mechanism of the inorganic and organic depressants in the separation of copper and molybdenum are thoroughly …

Abstract: Molybdenum sulfide is separated from a molybdenite-containing copper ore concentrate by subjecting an aqueous pulp of the concentrate to froth flotation in the presence of a collector for molybdenum sulfide and a Nokes-type (e.g., arsenic trioxide/sodium sulfide) depressant for copper sulfide, the aqueous pulp being aerated …

The potentials of more than −100 mV in the phases of copper concentration plants have created suitable conditions for the separation of copper sulfide and molybdenite minerals from gangue ...

A molybdenum (Mo) concentrate assaying 6.00% copper (Cu) and 19.01% Mo was magnetically sorted using a diamond-shaped steel rod medium mesh at a feed concentration of 20% and a pulp flow rate of 5 ...

Selective Cu-Mo separation was achieved by humic acids from pH 3 to 11. Humic acids adsorb onto molybdenite surface mainly via hydrophobic interaction. Humic acids (HA), a major component of humus or soil, was explored as a selective depressant for molybdenite during the flotation separation of molybdenite and chalcopyrite. …

Superconducting magnetic separation can effectively remove Cu from Mo concentrates. A non-magnetic product grading 0.46% Cu and 16.28% Mo was obtained from a Mo concentrate with a Cu content of 6.0% after a magnetic induction of 0.3 T and. magnetic induction of 5 T. In this process, the Cu removal rate was 92.33%.

Bench-scale flotation tests were carried out to research the flotation behavior of single molybdenite and chalcopyrite under different thermal pretreatment condition by using PBX (1 × 10 −5 mol/L) and MIBC (1 × 10-4 mol/L) as collector and frother, respectively. For these tests, the pH value of pulp was adjusted to 6 before flotation.

The optimum concentration of sodium sulfide for separation was 0.03 mol/L, which rejected 83% chalcopyrite and recovered 82% molybdenite in the single mineral flotation. Pulp potential measurements revealed that the dixanthogen and xanthate were decomposed and desorbed, respectively, from the mineral surface in a reducing …

Molybdenite is usually associated with chalcopyrite and other sulfide minerals, which troubles the efficient utilization of Mo resources.Flotation using various surfactants is a key technology to solve the problem. In this work, acetoacetamide (CSD2) is used as a novel depressant to realize the selective separation of molybdenite from …

and/or thermal treatment to depress copper sulfide minerals. The bulk copper/ molybdenumfeed generally varies from 0.2% Mo to 1.0% Mo, and with traditional reagents the single-stage rougher flotation recovery of molybdenite varies between 40% and 90% at a concentrate grade of 5% to 10% Mo. With ozone conditioning for copper depression, …

Separation of chalcopyrite from molybdenite is currently mainly carried out by flotation, but this process is costly because of the extensive use of inhibitors. This study briefly describes a 7.0T/100CGC low-temperature superconducting magnetic separator and discusses its separation principle as well as the effect of magnetic induction on …

Since molybdenite is a valuable mineral, high recovery and efficient separation with copper sulfide are more important [2]. The selective separation of sulfide minerals by froth flotation ...

Existing flotation practice for the separation of molybdenite from copper/molybdenum concentrates generally results in low Mo recovery and requires many stages offlotation. …

Molybdenum metallurgy is the technology for extracting metal molybdenum from molybdenum-containing ore raw materials. The molybdenite (MoS 2) has been used since the Middle Ages. As it looks like graphite, it was mistaken for abnormal graphite and used to make pencil lead. In 1778, Swedish chemist C. W. Scheler decomposed …

This study aims to investigate the effects of operational variables on concentrate grade, recovery, separation efficiency, and kinetic parameters of the copper flotation process. For this purpose, the effects of the pulp solids content, collector and frother dosage, and preparation and concentrate collection time were studied using a …

DOI: 10.1016/j.seppur.2023.124207 Corpus ID: 258972450; Collectorless flotation separation of molybdenite from complex sulfide minerals employing a bi-carbonyl depressant @article{Zhang2023CollectorlessFS, title={Collectorless flotation separation of molybdenite from complex sulfide minerals employing a bi-carbonyl depressant}, …

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. ... The pulp pH was adjusted to a desired value by dilute HCl or NaOH solutions. In the initial stage of the flotation, the depressant PAM-ATU, the …

A molybdenum (Mo) concentrate assaying 6.00% copper (Cu) and 19.01% Mo was magnetically sorted using a diamond-shaped steel rod medium mesh at a feed concentration of 20% and a pulp flow rate of 5 ...

Conventional separation of copper sulfide and molybdenite has been achieved with sulfide bulk flotation followed by selective molybdenite flotation with NaHS addition since NaHS works as a ...

This study briefly describes a 7.0T/100CGC low-temperature superconducting magnetic separator and discusses its separation principle as well as the effect of magnetic induction on chalcopyrite separation from molybdenite.

The separation of molybdenite and copper sulfide is achieved in the second stage through flotation. [8] In most scenarios, copper sulfides, such as …

EO was adopted as a novel pretreatment method for the separation of Cu-Mo sulfide.. Molybdenite could be efficient separated from the artificial mixed Cu-Mo sulfide. • Hydrophilic oxidation products were precipitated on chalcopyrite surface after EO.. Dissolution of oxidation products into the pulp made molybdenite keep good floatability.

1. Introduction. Copper and molybdenum is extensively applied in many fields, which plays an important role in national economy [1], [2].According to reports, porphyry Cu-Mo ores provide more than 50% copper and molybdenum production in the world, in which chalcopyrite mainly coexists with molybdenite [3], [4].Due to the increasing demand for …

Separation of Copper-Molybdenum Flotation Concentrate by Superconducting High-Gradient Magnetic Separation. Zekai Wang 1, Xindong Li 2,*, …

In the above sections, each of the rougher, cleaner, and scavenger flotation circuits of phases 1 and 2 of the Sungun copper concentration complex was investigated from the effect of pulp potential on the flotation of copper sulfide and molybdenite minerals, standpoint. In the following, the results and findings of these studies are …

However, the water contact angles of molybdenite surface changed hardly attributed to the rapid dissolution of oxidation products (e.g., MoO4²⁻ and SO4²⁻) into the pulp under alkaline ...

It is difficult to separate chalcopyrite and molybdenite under natural conditions. Chalcopyrite and molybdenite can be separated efficiently by adding …

Separating chalcopyrite and molybdenite is difficult owing to their similarly high floatability. Accordingly, this paper considers the depressant 2-Amino-5-mercapto-1,3,4-thiadiazole (AMT), in order to separate chalcopyrite and molybdenite and investigate the relevant mechanism of AMT depression.

Molybdenite is the main mineral for molybdenum extraction, which coexists with chalcopyrite in porphyry copper deposits. However, the separation of molybdenite from chalcopyrite by flotation uses large amounts of toxic depressants, causing financial, health and environmental concerns.

The varieties of copper sulphide depressants were introduced. The development and present situation of thioglycolic acid as an organic depressant for Cu-Mo separation were presented. The industrial experiment, in Dexing Copper Mine in 2000, showed that thioglycolic acid was a quality organic depressant, and could substitute Na 2S completely …

theoretically feasible to use magnetic separation to separate chalcopyrite from molybden-ite. The magnetic susceptibility of chalcopyrite is 0.840 310 6 m /kg, whereas that of molybdenite is 60.001 10 m3/kg. To obtain a better separation, a greater magnetic in-duction is required during magnetic separation because of the smaller …

This study aims to investigate the effects of operational variables on concentrate grade, recovery, separation efficiency, and kinetic parameters of the …

1. Introduction. Copper minerals and molybdenum minerals have closely paragenic relationships, and approximately half of molybdenum production comes from Cu-Mo sulfide ores as a by-product (Hirajima et al., 2014).Porphyry copper deposits are one of the primary resources for the extraction of copper and molybdenum, in which …

Molybdenum is critical for metallurgical and chemical industries. Molybdenite is the most important mineral resource for molybdenum, and it can be recovered as a byproduct from porphyry copper ores. Froth flotation, which is the most cost-effective way to separate Mo and Cu in industry, has been studied extensively.

In a few cases, the molybdenite is depressed by dextrin or starch, and the copper sulfide minerals are floated away from the molybdenite (Salter, 1964; Sutulov, 1970; Castro, 1979; Shirley, 1979). Existing flotation practice for the separation of molybdenite from copper/molybdenum concentrates generally results in low