منزل •remove lead from molybdenite concentrate

remove lead from molybdenite concentrate

  • Selective dissolution of copper and iron from molybdenite concentrate ...

    Their study resulted in 98% copper and 98% lead, and 79% calcium impurities dissolution from the molybdenite with the mixed chloride solution. ... Copper removal from molybdenite concentrate by sodium dichromate leaching. Hydrometallurgy, 48 (1998), pp. 313-325, 10.1016/s0304-386x(98)00006-1.

  • Lead removal method - Union Oil Company of California

    The molybdenite concentrate of Example 1 is leached with Na 4 EDTA solution at 10 percent by weight solids, at a temperature of 90° C., under air at atmospheric pressure, for varying periods of time and at varying molar ratios of EDTA to lead. Solutions of calcium hydroxide and sodium molybdate are added at the beginning of certain tests, to ...

  • US4083921A - Purifying molybdenum flotation concentrates

    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, …

  • Molybdenum ore processing technical process_Yantai Jinyuan …

    Molybdenum concentrate is obtained after second or third stage re-grinding and Four ore five times cleaner flotation. In order to ensure the quality of molybdenum concentrate, the heavy metal minerals such as copper, lead and iron contained in molybdenum concentrate, calcium oxide and carbonaceous minerals need to be further separated.

  • PROCESS FOR THE REMOVAL OF LEAD FROM MOLYBDENITE

    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 …

  • remove lead from molybdenite concentrate - astasy.it

    Mo in the gravity lead concentrate can be selectively leached. The XRD patterns of the gravity lead concentrate and the leached residue are listed in Fig. 5. As observed from Fig. 5, the gravity lead concentrate ma inly c os ted fwu (PbM O 4), molybdenite (MoS 2), galena (PbS), pyrite (FeS 2), and quartz (SiO 2). The XRD pattern of the leached ...

  • Separation of Rhenium from Lead-Rich Molybdenite Concentrate …

    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. Oxidative roasting-ammonia leaching was then carried out for …

  • Copper Remove From Molybdenum Concentrate Processing

    Remove Molybdenum By Flotation - Binq Mining. · Molybdenum – Wikipedia, the free encyclopedia. Molybdenum has a body-centered cubic crystal structure …. a flotation process to recover molybdenite from ores; flotation remains the primary isolation process … To completely remove it from the solution, …

  • Kinetics of Copper Removal from Sulfidized Molybdenite …

    The sodium cyanide leaching process was used to remove copper and gold from molybdenite concentrates in Chuquicamata, Utah Copper, and San Manuel,[2] and hydrochloric acid leaching was also used to remove lead and bismuth from molybdenite concentrates.[1,3] One of the major disadvantages of cyanide RAFAEL PADILLA and MARIA C. RUIZ, Professors ...

  • Process for purifying molybdenite concentrates - Justia

    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.

  • copper remove from molybdenum concentrate processing

    19 feb 1985 an improved process is disclosed for the treatment of molybdenite concentrate to remove impurities, such as copper and lead therefrom. cesl process - teck resources limited another advantage of the cesl process is that bulk concentrates (eg. washing and filtration: a series of washing stages remove the dissolved copper from the ...

  • US3854930A - Process for the removal of lead from …

    concentrate lead percent molybdenite ammonium chloride Prior art date 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

  • Copper Remove From Molybdenum Concentrate Processing

    remove lead from molybdenite concentrate. US3911076A Process for purifying molybdenite ... A process for selectively removing oxidized metal impurities of one or more of the metals cobalt, zinc, nickel, and copper from a molybdenite concentrate comprises suspending the molybdenite concentrate in an aqueous solution containing at least about 10 grams per liter …

  • Moval Copper From Molybdenite Concentrate

    Copper Removal From Molybdenite Concentrate By Sodium . abstract molybdenite flotation concentrate was leached with sodium dichromatesulfuric acid solutions in order to remove the copper sulfide impurities. the experimental results indicated that the temperature has a large influence on the copper dissolution. the concentration of dichromate has also a pronounced …

  • Copper Removal from Molybdenite by Sulfidation-Leaching Process

    The process involves a sulfidation of the molybdenum concentrate with 82(g) at 380 °C followed by a leaching stage. H 2 SO 4-NaCl-O 2 leaching of a sulfidized concentrate containing 3.4% Cu for 90 min at 100°C produced a molybdenite concentrate with less than 0.2% Cu, which is appropriate for marketing. Molybdenite dissolution was negligible ...

  • Separation of Rhenium from Lead-Rich Molybdenite Concentrate …

    @inproceedings{Li2016SeparationOR, title={Separation of Rhenium from Lead-Rich Molybdenite Concentrate via Hydrochloric Acid Leaching Followed by Oxidative Roasting}, author={Guanghui Li and Zhixiong You and Hu Sun and Rong Sun and Zhiwei Peng and Yuanbo Zhang and Tao Jiang}, year={2016} }

  • US4500496A - Process for purifying molybdenite concentrates

    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.

  • 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.

  • 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 …

  • US4500496A - Process for purifying molybdenite …

    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.

  • Separation of Rhenium from Lead-Rich Molybdenite …

    Abstract: 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.

  • copper remove from molybdenum concentrate processing

    Copper removal from molybdenite concentrate by sodium . 01051998 1 IntroductionMolybdenite (MoS 2) concentrates are commonly obtained as byproduct in the treatment of copper porphyry ores in which the molybdenite is a minor constituentThe conventional process to separate molybdenite from the bulk copper–molybdenum …

  • US3674424A - Process for purifying molybdenite concentrates

    impurities are removed from molybdenite concentrates by leaching the concentrates at a temperature of at least 70* c. with an aqueous solution containing at least one alkali metal or alkaline earth metal chloride and at least one oxidising chloride selected from cupric and ferric chlorides. ... 239000012141 concentrate substances 0.000 title ...

  • Removal of copper from molybdenite concentrate by …

    Abstract Mixed mesophilic and extreme thermophilic bioleaching were evaluated to remove copper from the molybdenite concentrate. Bioleaching tests were carried out in shake flasks and in a 50-L bioreactor. The shake flask tests were performed with different inoculum size, solids density, pH, and temperature in order to identify optimum conditions. The highest amount of …

  • Kinetics of Copper Removal from Sulfidized Molybdenite …

    The sodium cyanide leaching process was used to remove copper and gold from molybdenite concentrates in Chuquicamata, Utah Copper, and San Manuel, and hydrochloric acid leaching was also used to remove lead and bismuth from molybdenite concentrates.[1,3] One of the major disadvantages of cyanide leaching is the low dissolution of chalcopyrite ...