A Freeport-McMoRan Company
At both locations, the recovery of copper is the prime target; however, substantial quantities of molybdenum are also recovered. The molybdenum-containing mineral (molybdenite) is obtained from the ore at the mines by a series of crushing, grinding and flotation operations, which produce a concentrate consisting primarily of the molybdenite ...
Kinetics of Copper Removal from Sulfidized Molybdenite Concentrates …
Up to 65% of copper content of molybdenite concentrate was removed via bioleaching with a native strain of A. ferrooxidans in less than 15 days. Ferrous sulfate, sulfur or pyrite was added to ...
Recent progress on research of molybdenite flotation: A …
In a copper‑molybdenum processing plant, copper sulfide concentrate (such as chalcopyrite) is floated together with molybdenite in the first stage. [7] The separation of molybdenite and copper sulfide is achieved in the second stage through flotation. [8] In most scenarios, copper sulfides, such as chalcopyrite, are depressed using a depressant (e.g. …
Comprehensive Electrochemical-Chemical Study of Copper
The obtained results represented the probable molybdenite dissolution and the formation of various types of copper sulfide, iron chloride, and copper chloride complexes in …
Silver-catalyzed bioleaching of copper, molybdenum and …
Alkaline leaching of copper concentrate bearing molybdenite was investigated. Thermodynamic analysis of Mo-S-H2O and Cu-Fe-S-H2O indicates that alkaline leaching of copper concentrate is feasible ...
Investigation of Molybdenite Concentrate Roasting in …
The molybdenum concentrate used in the experiments is produced from copper ore and contains a significant amount of Cu. Since the behavior of Cu during roasting of MoS 2-based concentrate is also important, Mo-O-S and Cu-O-S systems were investigated together in the thermodynamic analysis.. In this part, all graphs are drawn with the FactSage program.
The selective leaching and separation of molybdenum from …
The leaching of the sulfidized molybdenite concentrate for 90 min at 100 °C dissolved 96% of the copper which yielded a final concentrate with less than 0.2% Cu.
The selective leaching and separation of molybdenum …
In recent years, there has been an increasing focus on the hydrometallurgical processing of molybdenite, with the decline of high-grade and easily handled molybdenum minerals. In this work, a novel method of selective extraction of complex molybdenite concentrate, which is characteristic of high-grade copper ore, has been in-vestigated.
Oxidation roasting of molybdenite concentrate
Semantic Scholar extracted view of "Oxidation roasting of molybdenite concentrate" by Lu Wang et al. ... The paper discusses methods of processing copper-containing molybdenite concentrates. A process flow diagram based on roasting with sodium chloride (or carbonate) and subsequent water leaching is … Expand. 2. 1 Excerpt;
Molybdenum removal from copper ore concentrate by
Molybdenum is commonly obtained as a byproduct from treatment of porphyry copper ores in which molybdenite is a minor constituent. The conventional separation process is differential flotation, which includes successive re-cleaning steps required to produce high-grade molybdenite concentrate [1], [2], [3].As a result of the many steps involved in the production …
Mesophilic and thermophilic bioleaching of copper from a …
DOI: 10.1016/J.MINPRO.2014.02.003 Corpus ID: 95624381; Mesophilic and thermophilic bioleaching of copper from a chalcopyrite-containing molybdenite concentrate @article{Abdollahi2014MesophilicAT, title={Mesophilic and thermophilic bioleaching of copper from a chalcopyrite-containing molybdenite concentrate}, author={Hadi Abdollahi and Sied …
Kinetics of copper dissolution in the purification of …
In this study, the selective dissolution of copper and iron from the molybdenite (MoS 2) concentrate consisting of chalcopyrite and pyrite by acidic sodium nitrate leaching …
Mesophilic and thermophilic bioleaching of copper from a …
Bioleaching at thermophilic temperatures (70 °C) yielded up to 75% Cu dissolution from the concentrate at 6% (w/v) pulp density, whereas the yields were about 27% at …
Comprehensive Electrochemical-Chemical Study of Copper
In this study, optimal conditions for maximum copper leaching (> 99%) were obtained at the concentration of HCl = 1 M, FeCl3 = 0.5 M, CuCl2 = 0.05 M, CaCl2 = 0.5 M at …
(PDF) Mesophilic and thermophilic bioleaching of copper …
With additional FeS2 (test 10), the concentration of Fed increased relatively slowly as the result of pyrite oxidation. 3.2. Bioleaching of 6% (w/v) molybdenite concentrate in 9 K medium formulation The bioleaching of Cu in 6% (w/v) molybdenite concentrate pulp was tested at three temperatures (Fig. 4).
The selective leaching and separation of molybdenum from …
In recent years, there has been an increasing focus on the hydrometallurgical processing of molybdenite, with the decline of high-grade and easily handled molybdenum minerals. In this work, a novel method of selective extraction of complex molybdenite concentrate, which is characteristic of high-grade copper ore, has been investigated. The …
COLUMN FLOTATION TO RECOVER MOLYBDENITE FROM RAKHA COPPER CONCENTRATE
COLUMN FLOTATION TO RECOVER MOLYBDENITE FROM RAKHA COPPER CONCENTRATE, INDIA. PART II: DEWATERING STUDIES AND THE CLEANER CIRCUIT @inproceedings{Rao1998COLUMNFT, title={COLUMN FLOTATION TO RECOVER MOLYBDENITE FROM RAKHA COPPER CONCENTRATE, INDIA. PART II: DEWATERING …
Separation of Copper-Molybdenum Flotation Concentrate …
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 chalcopyrite separation from …
Kinetics of pressure oxidative leaching of molybdenite concentrate …
By the subsequent ammonia leaching, 91.5% molybdenum was leached out from the calcine produced from oxidative roasting of the acid-leached concentrate, while only 79.3% Mo was leached from the ...
Kinetics of copper dissolution in the purification of …
Sulfidation leaching is effective for copper removal from molybdenite concentrates. •. Chalcopyrite copper in molybdenite concentrate was lowered to less than 0.2 …
Mesophilic and thermophilic bioleaching of copper from a …
The MoS 2-containing ore at the Sarcheshmeh Copper Complex also contains Cu-bearing minerals.The MoS 2-containing fraction is separated from Cu-sulfides with a rougher and seven sequential flotation cells in a four series bank.In this process, the molybdenite concentrate is moved to the next stage and the Cu-bearing tailing is diverted to the previous …
Selective copper–iron dissolution from a molybdenite concentrate …
The present research reports on the selective dissolution of copper and iron from a Chilean molybdenite concentrate using mesophilic, moderate and extreme thermophilic culture bacteria. From the resu...
Processing of Copper-Containing Molybdenite Concentrates by Roasting
The paper discusses methods of processing copper-containing molybdenite concentrates. A process flow diagram based on roasting with sodium chloride (or carbonate) and subsequent water leaching is presented. The chemistry of sulfide interaction with salt additives is described. The effect of the roasting temperature on copper and molybdenum distribution …
Copper removal from molybdenite concentrate by sodium …
Semantic Scholar extracted view of "Copper removal from molybdenite concentrate by sodium dichromate leaching" by M. C. Ruiz et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 221,614,655 papers from all fields of science. Search ...
Kinetics of pressure oxidative leaching of molybdenite concentrate …
The effect of parameters on pressure leaching of molybdenite concentrate was studied. Complete leaching of the molybdenite concentrates was achieved in less than one hour. Mechanism of the leaching reaction was determined. The amount of the reaction activation energy was calculated. The leaching precipitates were characterized by SEM and X-ray.
Comparison of the Effect of NaClO3 and H2O2 on the
The molybdenite concentrate obtained from the Sarcheshmeh copper complex (Sarcheshmeh, Iran) was used as the source of molybdenum. The chemical composition obtained by XRF is presented in Table 1. As it is seen, the concentrate contains 52% Mo and 35% sulfur. Therefore, the molybdenum percentage in each experiment could be calculated readily.
General Rules for Deep Purification of Low-Grade Molybdenite
The molybdenite concentrate comprises 43.55 wt% Mo, belonging to low-grade molybdenum ore. The rhenium in concentrate reaches 321 g/t, which demonstrate the great value for recovering Re. ... FeCl 2 +) are easy to dissolve in medium or acid water solution, while different complexes of copper–chlorine and lead–chlorine (CuCl, CuCl 2, PbCl 2 ...
Kinetics of Copper Removal from Sulfidized Molybdenite Concentrates …
Molybdenite concentrates produced from porphyry copper deposits contain copper as an impurity in variable quantities. To produce a high-grade molybdenite concentrate, a chemical purification method is normally practiced. In this paper, a new alternative for the copper elimination from molybdenite concentrates containing chalcopyrite by sulfidation of …
Selective copper dissolution during bioleaching of molybdenite concentrate
Copper content of the concentrate was 0.83 wt.% as chalcopyrite. The tests showed selective dissolution of copper (chalcopyrite) from molybdenite concentrate. Up to 65% of copper content of molybdenite concentrate was removed via bioleaching with a native strain of A. ferrooxidans in less than 15 days. Ferrous sulfate, sulfur or pyrite was ...
Molybdenite Concentrate Purification by a Continuous …
The basic design for an 80-t/day plant fed with 4 wt% copper molybdenite concentrate requires five backmixed reactors in series, each measuring 8 m3, operating at …