Home--->remove lead from molybdenite concentrate

  • PROCESS FOR THE REMOVAL OF LEAD FROM

    17-12-1974· I claim 1. The process for reducing the lead content of molybdenite concentrate which comprises heating the concentrate at a temperature between about 150°-450° C for a period of about 1/2 to 3 hours with from about .5-30 percent by weight of ammonium chloride, and leaching the treated concentrate with hydrochloric or nitric acid to convert lead in the concentrate to a soluble lead

    US3854930A Process for the removal of lead from

    concentrate lead percent molybdenite ammonium chloride Prior art date 1973-11-05 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired Lifetime Application number US00412584A Inventor D Kentro

    US3911076A Process for purifying molybdenite

    The molybdenite concentrates can be further leached with an acidic brine solution or hydrochloric acid solution to remove lead or iron impurities respectively, therefrom. Process for purifying...

    METHOD OF REDUCING LEAD FROM MOLYBDENITE

    The method of reducing lead from molybdenite concentrates such as application two stage recomminution,reflotation of rough concentrates and inhibition galena with Pnokes reactant and leaching molybdenite concentrates with FeCl3 HCl and CaCl2 mix liquior were described.

    Process for purifying molybdenite concentrates Brenda

    An improved process is disclosed for the treatment of molybdenite concentrate to remove impurities, such as copper and lead therefrom. According to this process, ferrous chloride liquor is introduced into a reactor which is made of a material that can withstand leaching with the use of ferric chloride at elevated temperatures and pressures.

    MOLYBDENITE CONCENTRATES IMOA

    Weighing and Sampling of Molybdenite Concentrates", ensuring the sample passes through a 100 mesh (ASTM) sieve (0.15 mm aperture), and mixed well prior to removal of the test portions to be assayed. The afore-mentioned procedure produces a hermetically sealed sample, the contents of which are to be assayed in their packed state, (point 4.4.2

    US3911076A Process for purifying molybdenite

    When the molybdenite concentrate contains nonoxidized metal impurities of such metals, The molybdenite concentrates can be further leached with an acidic brine solution or hydrochloric acid solution to remove lead or iron impurities respectively, therefrom. US3911076A Process for purifying molybdenite concentrates

    Separation of Rhenium from Lead-Rich Molybdenite

    Lead-rich molybdenite is a typical rhenium-bearing molybdenum resource in China, which has not been efficiently utilized due to its high contents of lead and gangue minerals. In this study, hydrochloric acid was used for preliminarily removing lead and calcite from a lead-rich molybdenite concentrate.

    Separation of Rhenium from Lead-Rich Molybdenite

    Lead-rich molybdenite is a typical rhenium-bearing molybdenum resource in China, which has not been efficiently utilized due to its high contents of lead Separation of Rhenium from Lead-Rich Molybdenite Concentrate via Hydrochloric Acid Leaching Followed by Oxidative Roasting Guanghui Li, Zhixiong You, Hu Sun,

    Molybdenum Processing IMOA

    Large rotary rakes move the molybdenite concentrate to promote the chemical reaction. Desulfurisation systems such as sulfuric acid plants or lime scrubbers remove sulfur dioxide from the effluent roaster gases. The resulting roasted molybdenite concentrate typically contains a minimum of 57% molybdenum, and less than 0.1% sulfur.

    Molybdenum: mining and processing-Metalpedia

    Large rotary rakes move the molybdenite concentrate to promote the chemical reaction. Desulfurisation systems such as sulfuric acid plants or lime scrubbers remove sulfur dioxide from the effluent roaster gases. The resulting technical mo oxide typically contains a minimum of 57% molybdenum, and less than 0.1% sulfur. Upgrading

    MOLYBDENUM CONCENTRATE SAFETY DATA SHEET

    May 5, 2015 Molybdenum Concentrate Page 3 of 6 Personal Precautions: Persons responding to an accidental release should wear coveralls or other protective clothing, gloves and a respirator (see also Section 8). Close-fitting safety goggles may be

    Removal of copper from molybdenite concentrate by

    Mixed mesophilic and extreme thermophilic bioleaching were evaluated to remove copper from the molybdenite concentrate. Bioleaching tests were carried out in

    Nitric acid leaching of molybdenite concentrates

    01-09-1980· Molybdenite (MoS 2) has been found to leach slowly in dilute (1–4 M) nitric acid at room temperature, to yield solutions of molybdic acid (H 2 MoO 4) and sulphuric acid.The solutions are supersaturated with respect to MoO 3 β 1 2 H 2 O, which is easily precipitated from the filtered pregnant solution as a fibrous crystalline solid having the consistency of paper pulp.

    Copper removal from molybdenite concentrate by

    01-05-1998· 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 recleaning steps in order to produce high-grade molybdenite concentrate.

    Molybdenum Wikipedia

    Molybdenum is a chemical element with the symbol Mo and atomic number 42. The name is from Neo-Latin molybdaenum, which is based on Ancient Greek Μόλυβδος molybdos, meaning lead, since its ores were confused with lead ores. Molybdenum minerals have been known throughout history, but the element was discovered (in the sense of differentiating it as a new

    US3674424A Process for purifying molybdenite

    impurities are removed from molybdenite concentrates by leaching the concentrates at a temperature of at least 70* c. with an aqueous solution containing at

    FR2525238A1 Process for purifying molybdenite

    improved process for treating a molybdenite concentrate to remove impurities such as copper and lead. ferrous chloride liqueur is introduced in a reactor 1 form of a material capable of resisting to leaching with use of ferric chloride at high temperatures and pressures. sodium or calcium chloride may also be added to the reactor which is then closed and subjected to

    Molybdenum: mining and processing-Metalpedia

    The resulting MoS2 concentrate usually contains 85%~92% MoS2 and small amounts of copper (less than 0.5 percent) if the molybdenum is recovered as a by-product of copper. Further treatment by acid leaching can be used to dissolve impurities like copper and lead if necessary.

    (PDF) Separation of Rhenium from Lead-Rich

    Separation of Rhenium from Lead-Rich Molybdenite Concentrate via Hydrochloric Acid Leaching Followed by Oxidative Roasting November 2016 Metals Open Access Metallurgy Journal 6(11):282

    Copper Removal from Molybdenite by Sulfidation

    Request PDF Copper Removal from Molybdenite by Sulfidation-Leaching Process Molybdenite (MoS2) concentrates are produced by differential flotation from bulk copper-molybdenum concentrates.

    Recovery of rhenium from a molybdenite roaster fume

    01-07-2015· Rhenium (Re) was recovered as high purity ammonium perrhenate (APR) from a scrub liquor produced by a pilot plant treating 2000 m 3 /h of a fume discharged from a molybdenite roaster. The hydrometallurgical process adopted incorporates first a neutralisation stage using lime to remove most of Mo, all Cu, As and other minor contaminants to produce a

    Removal of Copper from a Molybdenite Concentrate by

    Molybdenite (MoS2) in a mine co-exists with other metal sulphides and oxides, mainly copper sulphides. The quality of molybdenite concentrate is measured by the amount of copper in the concentrate

    Removal of copper from molybdenite concentrate by

    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.

    Molybdenum Wikipedia

    Molybdenum is a chemical element with the symbol Mo and atomic number 42. The name is from Neo-Latin molybdaenum, which is based on Ancient Greek Μόλυβδος molybdos, meaning lead, since its ores were confused with lead ores. Molybdenum minerals have been known throughout history, but the element was discovered (in the sense of differentiating it as a new

    Thermodynamic modeling of atmospheric

    01-12-2014· Hydrometallurgical leaching is a critical step in reducing the impurity content of molybdenite concentrates; the removal of copper by this method has been widely studied from an industrial perspective.

    METHOD OF REDUCING LEAD FROM MOLYBDENITE

    The method of reducing lead from molybdenite concentrates such as application two stage recomminution,reflotation of rough concentrates and inhibition galena with Pnokes reactant and leaching molybdenite concentrates with FeCl3 HCl and CaCl2 mix liquior were described.

    Purification of molybdenite concentrates

    2008 (English) Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE credits Student thesis Abstract [en] A molybdenite flotation concentrate was refined by selective removal of copper impurity with minimum dissolution of molybdenum in the concentrate.

    remove molybdenum by flotation BINQ Mining

    Copper, iron, and lead impurities are removed from molybdenum flotation concentrates by mixing the feed concentrates with a nonvolatile chloride salt, heating » More detailed utilization of municipal waste water for froth flotation of copper and

    Recovery of Molybdenum & Rhenium From

    Table of ContentsElectrooxidation Theory & PrinciplesEquipment and Operating ProcedureBipolar Cell DevelopmentLarge-Scale Electrooxidation TestsMolybdenum and Rhenium RecoveryConclusions As part of the goal to maximize minerals and metals recovery from primary domestic resources, design factors associated with minimizing current leakage in bipolar cell

    MOLYBDENUM CONCENTRATE SAFETY DATA SHEET

    persists, get medical advice/attention. DO NOT attempt to manually remove anything stuck to the eye. Skin Contact: Symptoms: Skin soiling, mild irritation. Wash gently and thoroughly with lukewarm, gently flowing water and non-abrasive soap for 5 minutes, or until product is removed.

    Separation of rhenium and molybdenum from

    The molybdenite concentrate is leached with nitric acid and subjected to solvent extraction to recover and separate rhenium and molybdenum from the leached liquor. The effects of pH and the chemicals' concentration on extraction characteristics of Mo and Re are investigated to define the best condition for selective extraction of these metals.

    Removal of copper and nickel from low grade

    Molybdenite concentrates produced by Uranium Corporation of India Ltd., Jadugoda contain excess copper and nickel as per specifications which need removal for quality production of molybdenic acid and ferromolybdenum. The influence of different process variables, such as leaching temperature, leaching period, concentration of leachant, namely cupric chloride, ferric

    The Metal Profile for Molybdenum ThoughtCo

    19-01-2020· Sublimation of the concentrate leads to molybdic oxide (MoO3), which, through a two-step hydrogen reduction process, produces molybdenum metal. In the first step, MoO3 is reduced to molybdenum dioxide (MoO2). Molybdenum dioxide is then pushed through hydrogen flowing tube or rotary furnaces at 1000-1100 C° (1832-2012 F°) to produce a metal powder.

    Phosphorus removal from molybdenite concentrates via

    Phosphorus removal from molybdenite concentrates via leaching Descripción del Articulo. In the process of copper -molybdenum separation is sometimes used reactive phosphorus pentasulfide P2S5 as copper depressant,which causes pollution problems in the final match molybdenite concentrates .

    Effects of pH and pulp potential on selective separation

    The final produced Cu- Mo concentrate in the Sungun plant contains 0.5% of Mo and 25% of Cu. In the molybdenite plant, Cu minerals are depressed by Na 2 S and molybdenite is floated with addition of diesel oil. However, a large amount of Na 2 S is required for reducing the pulp potential and selective flotation.

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