Volatilization behavior of impurities in molybdenum
Vacuum distillation is an ecofriendly and onestep approach to separate the impurities from molybdenum concentrate The purification of molybdenum concentrate is dependent on the distillation temperature, heating duration, and pressureThe removal of impurities in molybdenum concentrate has become a new challenge for enterprises due to the cancellation of pickling Whether impurity Removal Mechanism of Mineral Impurities in Molybdenum
Volatilization behavior of impurities in molybdenum concentrate
Volatilization behavior of impurities in molybdenum concentrate through vacuum distillation Molybdenum concentrate Material molybdenum concentrate was molybdenum concentrate potassium removal roasting potassium minerals ammonium molybdate Trans Nonferrous Met Soc China 33 (2023) 917−928 Release Release mechanism of impurity potassium in molybdenum
Concentrate Treatment Process ResearchGate
Abstract: The removal of impurities in molybdenum concentrate has become a new challenge for enterprises due to the cancellation of pickling Whether impurity minerals The potassium minerals in molybdenum concentrate are muscovite, orthoclase, anandite and illite, and the content of muscovite is several times higher than that of the other three Mineral phase and content of molybdenum concentrate
Volatilization behavior of impurities in molybdenum concentrate
DOI: 101016/jvacuum2022 Corpus ID: ; Volatilization behavior of impurities in molybdenum concentrate through vacuum distillation Abstract Lowgrade molybdenum concentrate is a typical resource to extract molybdenum, but it has long been used inefficiently due to its high contents of impu General Rules for Deep Purification of LowGrade Molybdenite
Oxidation roasting of molybdenite concentrate Semantic Scholar
The removal of impurities in molybdenum concentrate has become a new challenge for enterprises due to the cancellation of pickling Whether impurity Compared with traditional roasting, (NH 4) 6 Mo 7 O 24 ∙4H 2 O products prepared by microwave roasting molybdenum concentrate have fewer impurities and better crystallinity Author contribution statement Mengping Zhang: Methodology, Data Curation, Writing Original Draft Chenhui Liu: Conceptualization Xiongjin Zhu: SoftwarePreparation of ammonium molybdate by oxidation roasting of molybdenum
General Rules for Deep Purification of LowGrade Molybdenite Concentrates
Keywords Lowgrade molybdenite concentrate Impurities EpH Purification Introduction Molybdenum (Mo) is an essential element that is widely used in the steel industry, chemical industry, nonferrous metallurgy, and agriculture [1] By 2015, the global molybdenum production had reached 235,000 metric tons, which is sixteen timesStarting from the lowgrade molybdenite concentrate a refined molybdenite (978% MoS2) was made whose composition compares well with that of a technicalgrade MoS2 of the Climax Molybdenum CompanyVolatilization behavior of impurities in molybdenum concentrate
Application of Taguchi method for optimization of process
A new purification method for molybdenum disulfide via NaNO3–HCl–HNO3 synergistic leaching at 80 °C was developed The effects of the concentration of NaNO3, HCl, and HNO3, and liquid–solid ratio and the leaching time on the purification of molybdenum disulfide were investigated by orthogonal array design The Roasting Process As the material was low grade molybdenum concentrate,in addition, more talc and calcite were also contained In order to make the molybdenum concentrate fully roasted and oxidized, MnO 2 was chosen as the oxidant The influences of roasting temperature, roasting time and the quantity of oxidant were Study for Preparation of Industrial Ammonium Molybdate
Ammonia leaching of MoO3 concentrate: finding the reaction
In this study, the leaching kinetics of Mo from molybdenum trioxide concentrate was investigated in an alkaline mediumammonia solution The influence of temperature, time, pulp concentration, and particle size at various levels was studied on Mo dissolution rate Elemental analyses of solid and liquid specimens were achieved by X The appropriate mass ratio of Ca(OH) 2 to molybdenum concentrate is 1:1 When roasted at 650 °C for 90 min, the molybdenum retention rate and the sulfurfixing rate of lowgrade molybdenum concentrate reach 100% and 9292%, respectively, and the dissolution rate of molybdenum achieves 9912% with calcines being leached by Refining of a lowgrade molybdenite concentrate ScienceDirect
Selective dissolution of copper and iron from molybdenite concentrate
The kinetic study indicated that the impurities removal process was controlled by a mixed mechanism with a corresponding activation energy of 3577 kJ/mol at the Removal Mechanism of Mineral Impurities in Molybdenum Concentrate Treatment Process 2023, Minerals Separation of CopperMolybdenum Flotation Concentrate byI claim: 1 A method for preparing ammonium molybdate having low impurities of iron from an impure concentrate of molybdenum trioxide consisting of contacting said concentrate with from about 085 parts to about 3 parts by weight of an aqueous solution comprising about 2 to about 25 moles per liter nitric acid, 05 to 1 mole per liter of ammonium Process for purifying molybdenum trioxide GTE Products
Energy Consumption and Greenhouse Gas Emissions During
After a completed roasting process, the molybdenum concentrate (MoS 2) is converted into a roasted molybdenite concentrate (RMC), or technical grade molybdenum oxide, consisting more than 50% Mo, where 90% molybdenum is present in the form of MoO 3 and the rest is in the form of MoO 2 Most of the sulfur in the raw ore Pretreatment process of molybdenum calcine by roasting molybdenum concentrate ammonia alkali leaching acid precipitation ammonia solution purification process In the roasting process of molybdenum concentrate, resistance furnace is usually used for heat transfer, but the heating time is too long, production cost is high, energy Preparation of ammonium molybdate by oxidation roasting of molybdenum
Removal Mechanism of Mineral Impurities in Molybdenum Concentrate
The removal of impurities in molybdenum concentrate has become a new challenge for enterprises due to the cancellation of pickling Whether impurity minerals can be converted into soluble ions during roasting is important for the impurity removal by current water washing In this work, the interaction between various impurity elements in the treatment This paper proposes selective leaching of molybdenum from Mo/Cu complex bulk concentrates in a 5 M NaCl solution using the electrooxidation method Here, the effects of several Selective Leaching of Molybdenum from Bulk
Removal Mechanism of Mineral Impurities in Molybdenum Concentrate
The removal of impurities in molybdenum concentrate has become a new challenge for enterprises due to the cancellation of pickling Whether impurity minerals can be converted into soluble ions during roasting is important for the impurity removal by current water washing In this work, the interaction between various impurity elements in the treatment I claim: 1 A method for preparing ammonium molybdate having low impurities of iron from an impure concentrate of molybdenum trioxide consisting of contacting said concentrate with from about 085 parts to about 3 parts by weight of an aqueous solution comprising about 2 to about 27 moles per liter hydrochloric acid and about 15 to 2 moles per liter of Process for purifying molybdenum trioxide GTE Products
A novel simultaneous oxidizingvolatilizing process for
Thus, either the existing sublimation process or the new approach calls for highgrade molybdenite concentrates as raw materials However, highgrade molybdenum concentrates only comprise few impurities (below 10 wt%), which are too less to sustain the structure of roasted pellets Download : Download highres image (222KB)Molybdenum concentrates, as usually marketed, contain the mineral MoS 2,along with up to 10% silicious material as well as traces of iron, copper, and lead minerals The usual practice is to roast the concentrates with sufficiently low copper and lead levels to produce a calcine that is essentially MoO 3 containing low sulphur101016/jminpro200804002 DeepDyve
Spent catalyst: secondary source for molybdenum recovery
These catalytic processes generate huge quantity of spent catalyst With the increasing demand of metal values and environmental awareness, catalysts can serve as a secondary source for metal recovery Spent hydrorefining catalyst mainly consists of 10–20% MoO 3, 6–8% CaO, 0–12% V 2 O 5, 05–6% NiO, 10% S, 10–12% carbon and Environmentally achieving the flotation separation of chalcopyrite and galena is always a difficult problem due to the similar floatability of the two minerals To conquer the problem, maleic acid–acrylic acid copolymer (MA/AA), an ecofriendly reagent, was applied as a potential depressant for flotation separation of chalcopyrite from galena Minerals Free FullText Application of Maleic Acid&ndash
Prospects for involvement of lowgrade molybdenum and
The expediency of involving lowgrade concentrates and middlings in metallurgical processing is substantiated The possibility of efficient processing of lowgrade molybdenite (15–20% Mo) and scheelite (7–10% WO3) concentrates by hydrometallurgical and combined methods (with a preliminary roasting of scheelite concentrate) is shown