US3694147A - Process for the purification of molybdenum,
This invention relates to a novel process for the extraction or removal of impurities from molybdenum oxide concentrates and more particularly to a process involving leaching such concentrates with...CN103194623A - Method and device for purifying,The invention belongs to the technical field of purification and edulcoration of nonferrous metals, and particularly relates to a method and a device for purifying molybdenum concentrate. In the proposed method for purifying molybdenum concentrate, micro-wave heating, drying and deoiling, and micro-wave heating impurity denaturation are adopted to purify the molybdenum concentrate under a,Molybdenum Oxide Purification Process,28/08/2014· A process for purifying concentrates of molybdenum oxide containing a variety of naturally-occurring contaminating metals, such as potassium, copper, calcium, magnesium, iron, aluminum, lead, zinc, bismuth, and the like, as well as compounds thereof, by roasting the impure concentrate at an elevated temperature in an oxygen atmosphere to convert sub-oxides of molybdenum to molybdenumMolybdenum Disulfide Production Methods - Molybdenum,,Natural method is also called as molybdenum concentrate purification method, which is a method of removing high-quality molybdenum concentrates through physical and chemical action, removing impurities such as acid insoluble substances, SiO 2, Fe, Cu, Ca, And further refined to obtain nano-MoS 2.Molybdenum oxide purification process - Amax Inc.,A process for purifying concentrates of molybdenum oxide containing a variety of naturally-occurring contaminating metals, such as potassium, copper, calcium, magnesium, iron, aluminum, lead, zinc, bismuth, and the like, as well as compounds thereof, by roasting the impure concentrate at an elevated temperature in an oxygen atmosphere to convert sub-oxides of molybdenum to molybdenumUS4083921A - Purifying molybdenum flotation,Copper, iron, and lead impurities are removed from molybdenum flotation concentrates by mixing the feed concentrates with a nonvolatile chloride salt, heating the mixture to a temperature of from about 200° to 350° C for a time sufficient to activate the lead impurities in the concentrates so that they can be leached therefrom during the subsequent leach step, and leaching copper, iron, and lead impurities
US4604266A - Process for purifying molybdenum trioxide,
Processes are described for preparing pure ammonium molybdate from impure roasted molybdenum concentrates. An aqueous solution of nitric acid and ammonium nitrate is contacted with impure...CN103194623A - Method and device for purifying,The invention belongs to the technical field of purification and edulcoration of nonferrous metals, and particularly relates to a method and a device for purifying molybdenum concentrate. In the proposed method for purifying molybdenum concentrate, micro-wave heating, drying and deoiling, and micro-wave heating impurity denaturation are adopted to purify the molybdenum concentrate under a,General Rules for Deep Purification of Low-Grade,,Low-grade molybdenum concentrate is a typical resource to extract molybdenum, but it has long been used inefficiently due to its high contents of impurities such as Ca, Fe, Pb, and Cu. In this study, the deep purification of low-grade molybdenite concentrates have been investigated via both theory and experiments. E-pH calculation shows that acid system is beneficial to the leaching of,US4083921A - Purifying molybdenum flotation,Copper, iron, and lead impurities are removed from molybdenum flotation concentrates by mixing the feed concentrates with a nonvolatile chloride salt, heating the mixture to a temperature of from about 200° to 350° C for a time sufficient to activate the lead impurities in the concentrates so that they can be leached therefrom during the subsequent leach step, and leaching copper, iron, and,US4612172A - Purification of molybdenum - Google,The leached molybdenum trioxide is then water washed to remove residual impurities and the washed molybdenum trioxide is dissolved in ammonium hydroxide having an ammonium concentration sufficient to form an ammonium molybdate solution from which is crystallized the highly pure molybdenum compound. US4612172A - Purification of molybdenum - Google Patents Purification of molybdenumKinetics of copper dissolution in the purification of,,01/05/2013· In the processing of these ores, a bulk copper-molybdenum concentrate is produced, from which molybdenite is separated by differential flotation. However, complete separation of molybdenum from copper by flotation is difficult, and molybdenum concentrates produced by this route require a further step of chemical purification to reduce their copper content. This paper is concerned with a
Copper removal from molybdenite concentrate by
01/05/1998· The purification of molybdenite concentrates by this method is feasible, and the best results were obtained by leaching the concentrate with the stoichiometric concentration of H 2 SO 4 and 0.12 M Na 2 Cr 2 O 7 solution for 90 min at 100°C. Under these conditions, about 95% of the copper was dissolved with little dissolution of molybdenum. The kinetic study showed that the dissolution of,US4702895A - Purification of molybdenum - Google,US4702895A - Purification of molybdenum - Google Patents Purification of molybdenum Download PDF Info Publication number US4702895A. US4702895A US06/859,290 US85929086A US4702895A US 4702895 A US4702895 A US 4702895A US 85929086 A US85929086 A US 85929086A US 4702895 A US4702895 A US 4702895A Authority US United States Prior art keywords solutionMolybdenum Disulfide Production Processes - Molybdenum,,Purification method for molybdenum disulfide production and production processes are as follows: molybdenum concentrate (containing MoS 2 is 75%) heated by hydrochloric acid, hydrofluoric acid in the steam, stirred for several hours after repeated 3 to 4 times , remove the silicon, iron and other harmful impurities, so the MoS content is up to 97% or more. Finally, washed several times with,Molybdenum removal from copper ore concentrate by,01/01/2011· As a result of the many steps involved in the production of molybdenite concentrate the recovery of molybdenum is low. Furthermore, in most cases, it is necessary to use a final step, namely chemical purification of the molybdenite concentrate, to reduce the copper content to a level suitable for marketing. Common methods of chemical purification in industrial practice include the cyanide,Ammonium Molybdate Production Processes - Molybdenum,,Ammonium Molybdate Production Processes. Ammonium molybdate production processes are as following: First, roasted molybdenum concentrate to produce molybdenum trioxide, after ammonia leaching, purification, reacted with nitric acid, after separated,Purification process for technical grade molybdenum,As shown in the flow diagram comprising FIG. 1, the molybdenum disulfide concentrate, after the roasting step, is transferred in the form of a technical grade molybdenum oxide feed material to a mixer to which an aqueous acid solution is added to form a slurry. The concentration of the feed material in the slurry may range from as low as about 5% up to about 40% solids. Amounts less than about,
Copper removal from molybdenite concentrate by
01/05/1998· The purification of molybdenite concentrates by this method is feasible, and the best results were obtained by leaching the concentrate with the stoichiometric concentration of H 2 SO 4 and 0.12 M Na 2 Cr 2 O 7 solution for 90 min at 100°C. Under these conditions, about 95% of the copper was dissolved with little dissolution of molybdenum. The kinetic study showed that the dissolution of,Molybdenum removal from copper ore concentrate by,01/01/2011· As a result of the many steps involved in the production of molybdenite concentrate the recovery of molybdenum is low. Furthermore, in most cases, it is necessary to use a final step, namely chemical purification of the molybdenite concentrate, to reduce the copper content to a level suitable for marketing. Common methods of chemical purification in industrial practice include the cyanide,Method for purifying molybdenum - GTE Products,U.S. Pat. Nos. 3,848,049 and 3,829,550 disclose purification processes for molybdenum which involve leaching of molybdenum trioxide with dilute nitric acid. U.S. Pat. No. 3,694,147 discloses a process for purifying molybdenum trioxide of impurities such as lead, copper, iron, and zinc and some alkaline earths by leaching with an aqueous solution and an ammonium salt of the halide. U.S. Pat. No,Molybdenum extraction from molybdenite concentrate,01/05/2010· The commercial route for the extraction of molybdenum from its sulphide mineral molybdenite involves roasting of the concentrate, purification of the resultant calcine, either by distillation of MoO 3, or by a hydrometallurgical route, and, finally, hydrogen reduction of the trioxide to the metal. During roasting, much rhenium is lost due to volatilization and the SO 2 generated is aA novel technology for molybdenum extraction from,,01/10/2009· The commercial route for the extraction of molybdenum from its sulphide mineral molybdenite involves roasting of the concentrate, purification of the resultant calcine, either by distillation of MoO 3, or by a hydrometallurgical route, and, finally, hydrogen reduction of the trioxide to the metal. During roasting, much rhenium is lost due to volatilization and the SO 2 generated is aAmmonium Molybdate Production Processes - Molybdenum,,Ammonium Molybdate Production Processes. Ammonium molybdate production processes are as following: First, roasted molybdenum concentrate to produce molybdenum trioxide, after ammonia leaching, purification, reacted with nitric acid, after separated,
MOLYBDENUM CONCENTRATE SAFETY DATA SHEET
Acute inhalation of molybdenum concentrate dust or fume may produce irritation of the upper airways. Possible cancer hazard . May 5, 2015 Molybdenum Concentrate Page 2 of 6 due to the silica content. Full face piece SCBA and protective clothing are required for fire emergency response personnel due to the possibility of release of high concentrations of sulphur dioxide from burning concentrate,Molybdenum sulfide concentrate NIST® SRM® 333a |,Molybdenum sulfide concentrate NIST ® SRM ® 333a Synonym: Molybdenum disulfide, Molybdenum(IV) sulfide CAS Number 1317-33-5. Empirical Formula (Hill Notation) MoS 2. Molecular Weight 160.07 . MDL number MFCD00003470. PubChem Substance ID 329818750. NACRES NA.24process flow chart concentrate molybdenum production,,03/05/2013· Copper and Molybdenum – Behre Dolbear. mineral processing flow The study involved a site visit and a review of pre- production, current feasibility study on the Spinifex Ridge Molybdenum Project.… provisions and concentrate handling facilities at Port Hedland, for the MolyMines plant and flow chart, and of tailings treatment and impoundment facilities.,,,
