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 …
Molybdenite Concentrate Copper Leaching. One embodiment provides leaching copper from the molybdenite concentrate with a leaching solution comprising ferric chloride, removing molybdenite from the leaching solution, introducing an acid into the leaching solution and introducing O2, O3, or a combination of both, into the leaching solution.
Typically, rougher molybdenite flotation and recovery from bulk copper/molybdenum concentrates involves the use of alkalisulfides, Nokes reagents, cyanides, oxidants, and/or thermal treatment to depress copper sulfide minerals. The bulk copper/molybdenum feed generally varies from 0.2% Mo to 1.0% Mo, and with …
Section snippets Molybdenite concentrate. 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 …
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 …
In order to reduce the copper content, molybdenite concentrates are generally leached with a ferric chloride solution (Brenda process) or cyanided, although …
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 ...
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 ...
Molybdenite is the most important molybdenum concentrate, which is mainly recovered as a by-product from porphyry copper deposits. Due to the low efficiency of purification processes such as flotation in the reduction of copper content of molybdenum concentrate to a standard level (i.e., less than 0.5 wt.%), further …
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. …
A technique for leaching molybdenum from low-grade roasted molybdenite concentrate was proposed by the aqueous solution containing sodium chlorate and sodium carbonate. The effect of molar ratio of sodium chlorate to molybdenum, leaching time, liquid–solid ratio, leaching temperature, sodium carbonate concentration and agitating …
About 94% of copper was removed at 80°C after 120 h of leaching with a residual copper content of 0.46% which meets the commercial requirements for …
tive leaching of molybdenite from molybdenite concentrates when the copper impurity is in the form of chalcopyrite. An additional goal was to economically reclaim copper, and the leaching kinetics of molybdenite have been investigated. Experimental The ore sample (Mo 35.40%, S 28.40%, Cu 7.90%, P 0.04%, As 0.10%, CaO 0.17%, SiO 2
3 was prepared from molybdenite concentrate through oxidation roasting in a microwave heating system and a resistance furnace, respectively. The phase transitions and morphology evolutions during oxidation roasting were characterized through X-ray diffraction and scanning electron microscopy. Results show that microwave thermal …
Semantic Scholar extracted view of "Copper leaching from chalcopyrite concentrate in Cu(II)/Fe(III) chloride system" by Jianming Lu et al. ... In this research work, the copper compound which exists in the form of sulfide in molybdenite concentrate (M1 and M2 samples) dissolved with a mixed solution of iron chlorides (FeCl3 and FeCl2), …
The Anaconda Minerals Company operates a molybdenite and copper producing mine and mill facility near Tonopah, Nevada. Included with the milling facility is a. Skip to content. Learn Mining & Metallurgy; Buy Process Equipment; Contact; Equipment. Gold Recovery. Gold Wash Plants; Gold Shaker Tables; Fine Gold Recovery; Crushers.
The effect of silver on the mesophilic bioleaching of the molybdenite concentrate was tested in the range of 0–1000 mg Ag l −1, added as AgNO 3.Selective results are shown in Fig. 1 as examples of changes over time in pH, redox potential, cell counts and the leaching of Cu, Mo, and Re with 0, 120, and 1000 mg l −1 Ag addition.. …
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 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...
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 219,885,252 papers from all fields of science. Search ...
The technology of molybdenum extraction from molybdenite concentrate by using potassium chlorate (KClO 3) or sodium chlorate (NaClO 3) has been investigated.The results show that leaching time, leaching temperature, agitation speed, oxidizer type, potassium or sodium chlorate, and hydrochloric acid concentration have significant …
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.
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 …
The process involves a sulfidation of the molybdenite concentrate with S 2 (g) at 380 °C followed by a leaching stage with H 2 SO 4 –NaCl–O 2. 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. Molybdenite dissolution was ...
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 results …
1. Introduction. Molybdenite (MoS 2) concentrates are commonly obtained as byproduct in the treatment of copper porphyry ores in which the molybdenite is a minor constituent.The conventional process to separate molybdenite from the bulk copper–molybdenum concentrate is differential flotation, which includes successive …
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 …
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 …
Introduction. Molybdenum (Mo) is an important metal that widely used in metallurgical industry (Romano et al., 2001). In nature, Mo normally exists in Mo-bearing minerals such as molybdenite (MoS 2), jordisite (amorphous MoS 2) and powellite (CaMoO 4) (Das et al., 2016), among which, MoS 2 is the primary source of Mo …
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 …
Abstract 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. ... pH, potential, pulp density, or addition of silver as catalyst. Optimal copper–iron dissolution is obtained using extreme thermophilic ...
Molybdenite in porphyry ores is a byproduct of copper concentrate, therefore it is more reasonable to establish both the grinding size and the flotation scheme for copper minerals. [8] Fig. 19 (a) [ 13 ] displays the average size by size recovery of molybdenum and copper for 18 months in the Bingham Canyon mine.
The present study experimentally investigated the novel process for the dis-solution of copper from the concentrate using FeCl3–FeCl2 leaching to upgrade the MoS2 …
leaching of molybdenum and recovery of copper from complex molybdenite concentrate is an effective separa- tion method. The diffusion control model can be used to describe …
This study evaluated silver-catalyzed bioleaching to solubilize copper from a chalcopyrite-bearing molybdenite concentrate with mesophilic (32 °C) and moderately thermophilic (45 °C) microbial consortia. The Cu content of the concentrate was 0.98% (wt/wt), with chalcopyrite as the major Cu-bearing mineral. The molybdenite phase (53.8% Mo) also …
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 …
It indicated that small amount of molybdenite accompanied in the copper concentrate was more easily oxidized compared with other sulfides. Combined with research results of two companies, it inspired us that molybdenite can react with metal sulfide to form molybdenum matte which can be separated from the melting matte by …