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  • Acid Leaching - Metallurgist Mineral Processing

    2020-7-5  Final ACID Leaching Process. The final process decided upon was as follows: Ore crushed to about 4-mesh; leached 8 full days by counter-current; washed with three counter-current wash waters (or possibly four); solution, practically neutral during last 2 days of contact with ore, is sent through reduction towers, where it meets sulphur dioxide ...

  • Integrated acid leaching and biological sulfate

    Author: Marja Salo, Oleg Knauf, Jarno Mäkinen, Xiaosheng Yang, Pertti Koukkari
  • Improved recovery of valuable metals from spent

    Cited by: 3
  • Microwave-assisted reduction and leaching process of ...

    The time of acid leaching by microwave heating is only 60% that by conventional heating. The leaching ratios of Fe and Mg by microwave heating were 1.82 and 57.8 times than that by conventional heating. A novel microwave-assisted process for preparation of titania-rich materials using high level content of CaO and MgO Panzhihua ilmenite was ...

  • Kinetics of reduction leaching of manganese dioxide

    Cited by: 18
  • Insights into modified red mud for the selective

    Red mud (RM) is a solid waste rich in iron oxide, which has the potential to be utilized as the catalyst for selective catalytic reduction (SCR) of NO x.We pretreated the RM sample with the selective acid leaching method, after which 97.6 % of the alkali was neutralized, and only 8 % of the Fe 2 O 3 were leached out. Once leached, the RM samples were activated for the SCR reaction.

  • Manganese extraction by reduction acid leaching from

    2015-5-26  reduction leaching of low-grade manganese oxide ores [3,4]. Generally speaking, such ores can be treated either by reduction roasting followed by acid leaching or directly by reductive acid leaching using different reducing agents [5]. The reductants used for reduction roasting−acid leaching include coal, graphite or sulfur [6,7], pyrite [8],

  • (PDF) A review of chemical leaching of coal by acid

    Reduction of the aluminosilicate clay . ... like alkali and acid leaching or combined . method alkali and a cid leaching. Both s teps . are formed by mixing the coal with a chemical .

  • Up-grading of natural ilmenite ore by combining

    Rutile (TiO2) is heavily used in pigments and colorants, and the most abundant source of rutile is ilmenite. Upon oxidation of ilmenite, rutile can be formed with modest energy consumption; furthermore, after leaching, only a few byproducts are formed. Unfortunately, one drawback is the necessarily long oxidative process of typically used methods. In this study, we show that a fluidized bed ...

  • Ammonia/nitric Acid Leaching of Copper- Cobalt

    2017-8-27  Ammonia leaching has been successfully developed, and applied to leach copper, due to its numerous advantages on the process, exceptionally its selectivity. As reported in [3]; the process is more environment friendly than conventional acid heap leaching, which uses sulphuric acid to dissolve copper and cobalt. Reference [4]

  • Acid Leaching Zinc and Indium with Reduction Ferric ...

    Deng Z. et al. (2016) Acid Leaching Zinc and Indium with Reduction Ferric Simultaneously from Marmatite and High-Iron Neutral Leaching Residue. In: Alam S., Kim H., Neelameggham N.R., Ouchi T., Oosterhof H. (eds) Rare Metal Technology 2016.

  • Microwave-assisted reduction and leaching process of ...

    Abstract: The applications of microwave heating for carbothermic reduction and acid leaching of ilmenite were presented. The experiment results show that the time needed for ilmenite concentrate reduction by microwave heating was shortened to 50% that of the conventional heating.

  • Manganese extraction by reduction–acid leaching

    2020-6-4  Abstract The extraction of manganese from low-grade manganese oxide ores using CaS derived from CaSO 4 as reductant was investigated. The effects of mass ratio of CaS to ore, reduction temperature, reduction time, liquid to solid ratio (L/S ratio), stirring speed, leaching temperature, leaching time and H 2 SO 4 concentration on the leaching rates of Mn and Fe during the reduction–acid ...

  • A Low Grade Manganese Dioxide Ore Roasting Reduction ...

    The research of manganese dioxide after roasting reduction using sulfuric acid leaching characteristics,is a basic work for the efficient use of manganese ore resources.In our self-developed roasting reduction device,the manganese dioxide ore reduction rate is 94.67 ...

  • Kinetics of reduction leaching of manganese dioxide ore ...

    2017-2-21  Reduction leaching; Kinetics Abstract The leaching kinetics of reductive leaching of manganese from manganese dioxide ores (MDO) in dilute sulfuric acid in the presence of Phytolacca americana powder (PAP) was investigated. The effects of stirring speed, leaching temperature and leaching time, particle size, weight ratio of PAP to MDO (C

  • Effect of acid-leaching on carbon-supported copper ...

    Effect of acid-leaching on carbon-supported copper phthalocyanine tetrasulfonic acid tetrasodium salt (CuTSPc/C) for oxygen reduction reaction in alkaline electrolyte: active site studies Q. Zhang, T. Zhu, X. Qing, J. Qiao and S. Sun, RSC Adv. , 2015, 5 , 50344

  • Acid Leaching - Copper Ore Treatment Method

    2020-6-25  Acid Leaching Process Flowsheet. ... One of the important factors in percolation leaching is the size reduction necessary for copper recovery within reasonable time limits. It is self evident that the larger the size of particle that can be readily leached, the less the cost of crushing becomes and the smaller the particle the less time ...

  • Recovery of iron from zinc leaching residue by selective ...

    2013-1-7  After acid leaching, the leaching residue contains approximately 14.1% iron and 5.6% zinc. In the whole treatment process, about 68.4% iron and 86.4% zinc were recovered while only 13% iron entered into the zinc-enriched solution, which significantly decreased the subsequent iron precipitation burden before zinc recovery by electrowinning.

  • Selective leaching of zinc from zinc ferrite with hydrochloric ...

    2015-2-3  The disadvantages of the sulphuric acid leaching are that jarosite may be formed at pH b 2 during atmospheric pressure leaching, and that Pb is not leached (Baik and Fray, 2000). Hydrochloric acid has been found to be a very effective lixiviant for the leaching of zinc ferrite.

  • Hydrometallurgy - Journal - Elsevier

    2020-7-7  Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on case histories and operational difficulties.. Topics covered include: leaching of metal values by chemical reagents or bacterial action at ambient or elevated pressures and temperatures;

  • Phosphorus Removal of High Phosphorous Oolitic

    A process with acid leaching followed by hydrogen-based fluidized reduction and melt separation is presented for recovering DRI (direct reduced iron) from high-phosphorus oolitic hematite in this study, and the aim of this study is to provide theoretical and technical basis for economical and rational use of high phosphorus oolitic iron ores.

  • 锌冶炼高铁酸浸渣SO2还原浸出研究-Study on SO2 ...

    SO2还原浸出过程是赤铁矿法炼锌的重要工序,研究了SO2还原浸出过程中锌、铁、铜、砷、硅等元素的行为。结果显示,在110 ℃、终酸30 g/L的条件下浸出2 h,锌浸出率可达95%,并获得一种适合铜铅熔炼的浸出渣。;SO2 reduction leaching process is an ...

  • Synergistic effect of reduction leaching of manganese ...

    The reduction leaching of manganese anode slime and the oxidative decomposition of pyrite and arsenopyrite could be realized simultaneously by the synergistic action of the two ores. The effects of time, mass ratio of two ores, concentration of sulphuric acid and temperature on the leaching rate of manganese were investigated.

  • Reductive acid leaching of valuable metals from mixed ...

    2017-6-14  Briefly, equations 1-3 are for chemical reduction of LiCoO 2, equations 4-6 are for chemical reduction of MnO 2, and equations 7-9 are for chemical reduction of Mn 2 O 7. Table 1 presents the test conditions used in this work for various reductive acid leaching. To compare the difference in reductive acid leaching performance due to the change ...

  • Effect of Sodium Borate on the Preparation of TiN from ...

    2019-11-2  the impure TiN after magnetic separation and will thus hinder the purification of TiN by acid leaching. Therefore, the formation of MgAl2O4 should be inhibited during the reduction roasting process. Sodium roasting is a commonly used technique to convert acid-resistant substances to soluble substances in extractive metallurgy [16,17].

  • Acid Leaching - Copper Ore Treatment Method

    2020-6-25  Acid Leaching Process Flowsheet. ... One of the important factors in percolation leaching is the size reduction necessary for copper recovery within reasonable time limits. It is self evident that the larger the size of particle that can be readily leached, the less the cost of crushing becomes and the smaller the particle the less time ...

  • SKL 钢铁冶金新技术国家重点实验室

    Lei Guo, Yinhe Lin, Zongliang Zhang, Zhancheng Guo:Sticking resistance study of vanadium titano-megnitite reduction in a fluidized bed with coating methods and acid leaching method. Proceedings of the 11th International Conference on Fluidized Bed Technology, Chemical Industry Press, 2014, p 239-244.

  • Hydrometallurgy - Journal - Elsevier

    2020-7-7  Hydrometallurgy aims to compile studies on novel processes, process design, chemistry, modelling, control, economics and interfaces between unit operations, and to provide a forum for discussions on case histories and operational difficulties.. Topics covered include: leaching of metal values by chemical reagents or bacterial action at ambient or elevated pressures and temperatures;

  • 田磊-材料冶金化学学部

    2019-3-11  Kinetics of indium dissolution from sphalerite with high indium content in pressure acid leaching[J]. Rare Metals, 2017, 36(1): 69-76. (sci 收录) 7. L. Tian, T.A. Zhang, Y. Liu, G.Z. Lv, J. J. Tang. Variation law of gas holdup in the autoclave during pressure leaching

  • The leaching and adsorption behaviour of gold ores

    2020-5-28  OF LEACHING, PREG-ROBBING AND ADSORPTION ONTO ACTIVATED CARBON 175 7.1 OBJECTIVES OF THIS CHAPTER 175 7.2 BACKGROUND INFORMATION 175 7.3 MODELLING OF LEACHING 177 7.3 .1 Parameter determination for the leaching model 178 7.3.2 Application of the leaching model 178 7.3.2.1 New Celebration oxide ore 179 7.3.2.2 Telfer Oxide ore 180

  • Recovering Valuable Metals from Spent Lithium Ion

    2019-6-25  The traditional acid leaching process for releasing valuable metals from spent lithium-ion batteries (LIBs) is inefficient and inevitably consumes large amounts of reductants. In this study, a novel process, based on a reduction thermal treatment and reductant-free acid leaching, for recycling valuable metals from spent LIBs has been developed. First, a thermodynamics calculation was performed ...

  • Synergistic effect of reduction leaching of manganese ...

    The reduction leaching of manganese anode slime and the oxidative decomposition of pyrite and arsenopyrite could be realized simultaneously by the synergistic action of the two ores. The effects of time, mass ratio of two ores, concentration of sulphuric acid and temperature on the leaching rate of manganese were investigated.

  • Hydrometallurgical recycling of valuable metals from

    A reductant counts for much in the hydrometallurgical recycling of valuable metals from spent lithium-ion batteries (LIBs). There is limited information about SnCl 2 as a reductant with organic acid (maleic acid) to recover value metals from spent LiCoO 2 material. The leaching efficiencies were 98.67% and 97.59% for Li and Co with 1 mol L-1 of maleic acid and 0.3 mol L-1 of SnCl 2 at 60 ° C ...

  • Leaching and reduction in hydrometallurgy (Book,

    Get this from a library! Leaching and reduction in hydrometallurgy. [A R Burkin;] -- Electrochemical model for the leaching of uranium dioxide / MJ Nicol, CRS Needes, NP Finkelstein; Alkali pressure leaching of chromium (III) oxide and chromite mineral / CJ Farrow and AR Burkin; ...

  • Reduction Leaching of Manganese Dioxide Ore Using

    2015-7-29  Reduction Leaching of Manganese Dioxide Ore Using Black Locust as Reductant in Sulfuric Acid Solution Jianrong Xue*,**, Hong Zhong*†, Shuai Wang*,†, Changxin Li*, Jinzhong Li* and Fangfang Wu* *College of Chemistry and Chemical Engineering,

  • Uranium processing - Leaching Britannica

    Uranium processing - Uranium processing - Leaching: Roasted uranium ores are leached of their uranium values by both acidic and alkaline aqueous solutions. For the successful operation of all leaching systems, uranium must either be initially present in the more stable hexavalent state or be oxidized to that state in the leaching process. Acid leaching is commonly performed by agitating an ore ...

  • Microwave Acid Leaching of Beneficiated Ilmenite for the ...

    2012-12-19  and leaching and c) complete reduction of ilmenite followed by electric smelting and acid leaching. Becher process used successfully in Western Australia for the production of synthetic rutile involves the reduction of iron component of ilmenite to the

  • Reaction Behavior of Phosphorus in Coal-Based

    2017-5-9  The acid leaching or bio-leaching is used for the dephosphorization of high phosphorus-containing ... The reduction of apatite to phosphorus, the enrichment of phosphorus in reduced iron, the corresponding phase transformation, and the migration behavior of phosphorus were analyzed.

  • acid leaching - Traduction française – Linguee

    De très nombreux exemples de phrases traduites contenant "acid leaching" – Dictionnaire français-anglais et moteur de recherche de traductions françaises.

  • The leaching and adsorption behaviour of gold ores

    2020-5-28  OF LEACHING, PREG-ROBBING AND ADSORPTION ONTO ACTIVATED CARBON 175 7.1 OBJECTIVES OF THIS CHAPTER 175 7.2 BACKGROUND INFORMATION 175 7.3 MODELLING OF LEACHING 177 7.3 .1 Parameter determination for the leaching model 178 7.3.2 Application of the leaching model 178 7.3.2.1 New Celebration oxide ore 179 7.3.2.2 Telfer Oxide ore 180