آخرین محصولات
Reductive leaching of manganese from low-grade pyrolusite ...
Manganese (Mn) leaching and recovery from low-grade pyrolusite ore were studied using sulfuric acid (H 2 SO 4 ) as a leachant and pyrolysis-pretreated sawdust as a reductant. The effects of the dosage of pyrolysis-pretreated sawdust to pyrolusite ore, the concentration of sulfuric acid, the liquid/solid ratio, the leaching temperature, and the leaching time on manganese and iron leaching ...
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Recovery of Manganese from Spent Batteries Using Guar Meal ...
The reductive leaching of manganese from mixed zinc–carbon and alkaline battery powder using guar meal as a new reducing agent in a sulfuric acid medium was investigated. The effects of the sulfuric acid concentration, amount of guar meal, leaching temperature, leaching time, and stirring speed were tested. The optimal leaching conditions for −88 μm particles were determined …
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Process for making manganese - Elkem Metals, Company L. P.
Using the electrolytic process to make manganese metal, a source of manganomanganic oxide (Mn 3 O 4) is used in the sulfuric acid leach solution in conjunction with a reducing agent to convert the manganomanganic oxide into manganese sulfate for treatment in the electrolytic cell.Sources of manganomanganic oxide include sintered manganese ore, manganese ore having less than 7% …
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Acidic leaching and precipitation of zinc and manganese ...
The main objective of this study was to investigate the effects of reductive acidic leaching and further precipitation on the recovery of manganese and zinc from spent alkaline and zinc-carbon battery powders. Ascorbic acid (AA), citric acid (CA) and oxalic acid (OA) were tested as the reductants. S …
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Investigation of the leaching mechanism of NMC 811 (LiNi 0 ...
Abstract. This paper investigates the reactions involved when LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC 811), which is one of the most promising positive electrodes for the next generation of lithium-ion batteries, is leached by hydrochloric acid. This study shows that the leaching behaviour of lithium is quite different than those observed for nickel, cobalt and manganese contained in NMC 811 since ...
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(PDF) Manganese metallurgy review. Part I: Leaching of ...
Manganese metallurgy review. Part I: Leaching of ores/secondary materials and recovery of electrolytic/chemical manganese dioxide. Hydrometallurgy, 2007. Chu Cheng. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 36 Full PDFs related to this paper. Read Paper.
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Phase, Microstructure and Beneficiation of Manganese Ore ...
Siliceous Manganese Ore, Characterization, Leaching, Sawdust, Sulfuric Acid 1. Introduction Manganese is an important element with a number of uses in major industrial applications i.e. production of steel, preparation of dietary additives, fertilizers, dry cells, paint production, animal feeds, textile dyes, medicines and colorants for bricks.
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Kinetics of reduction leaching of manganese dioxide ore ...
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.
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(PDF) Preparation of manganese sulfate from low-grade ...
The optimal leaching conditions in sulfuric acid media were determined; under the optimal conditions, the leaching efficiencies of Mn and Ca were 92.42% and 9.61%, respectively. Moreover, the...
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Preparation of manganese sulfate from low-grade manganese ...
In this study, a method for preparing pure manganese sulfate from low-grade ores with a granule mean size of 0.47 mm by direct acid leaching was developed. The effects of the types of leaching agents, sulfuric acid concentration, reaction temperature, and agitation rate on the leaching efficiency of manganese were investigated. We observed that sulfuric acid used as a leaching agent provides a ...
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US5534234A - Recovery of manganese from leach solutions ...
Methods of recovering manganese in the form of manganese carbonate from ores containing manganese and iron while also removing substantially all of the iron contained in the sulfurous acid leach solution are disclosed.
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CN103757267B - The leaching method again of the waste ...
The leaching method again of the waste residue that the sulfuric acid leaching manganese carbonate ore that the present invention introduces produces, be by sulfuric acid leaching manganese carbonate ore produce waste residue be milled down to particle diameter≤180 order after and≤1.5mm cavings add in the lump withstand voltage, resistance to sulfuric acid and nitric acid corrosion reactor ...
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Manganese ore tailing: optimization of acid leaching ...
Manganese recovery from industrial ore processing waste by means of leaching with sulfuric acid was the objective of this study. Experimental conditions were optimized by multivariate experimental design approaches. In order to study the factors affecting leaching, a screening step was used involvin …
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leach tanks for leaching manganese
The extraction of manganese from a semi-oxidized manganese ore was investigated with sucrose as the reducing agent in dilute sulfuric acid medium. The kinetics of leaching manganese from the complex ore containing MnCO3 and MnO2 was also investigated. The effects of sucrose and sulfuric acid concentrations, leaching temperature and reaction ...
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SULPHURIC ACID LEACHING OF LOW/MEDIUM GRADE …
4.2 Leaching Studies for Manganese Nodules Leaching studies on manganese nodule were carried out by varyingparameters such as leaching time, hydrazine concentration, sulphuric acid concentration, leaching temperature and pulp density. The results are briefly discussed in the following sections: 98 D. Hariprasad et al./ JMM 49 (1) B (2013) 97 - 106
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LEACHING OF MANGANESE ORES USING CORNCOB AS …
Abstract: In this study, corncob was used as reductant for sulfuric acid leaching of manganese ore from Daweezi, Upper Mohmand Agency, Pakistan. X-ray diffraction of representative powdered samples revealed the presence of manganese silicate MnSiO(SiO 4), calcite (CaCO 3), and -quartz (SiO 2). X-ray
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Synergistic leaching mechanism of chloride ions for ...
In this study, manganese is extracted completely from manganese carbonate ores by means of leaching with sulfuric acid under the synergistic effect of chloride ions. It is demonstrated that the introducing of chloride ions shows a positive effect on manganese leaching and the leaching efficiency of manganese could reach 99.5% under the optimal leaching conditions.
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Kinetic Study of the Leaching of Low-Grade Manganese Ores ...
Abstract: The reductive leaching of manganese from a low-grade manganese oxide ore was investigated by using pretreated sawdust as the reductant in a sulfuric acid medium. The effects of stirring speed, liquid/solid ratio, sawdust/ore mass ratio, sulfuric acid concentration, reaction temperature, and time on the manganese extraction were examined.
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STUDI PELINDIAN MANGAN SECARA REDUKSI DENGAN …
The experimental results indicated that the leaching rate increases with the increases of the agitation, sulfuric acid concentration and with the decreases of solid/liquid mass ratio. The optimal condition for leaching manganese from manganese dioxide ores was determined as the agitation of 400 rpm and sulfuric acid concentration of 12%for 180 ...
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LEACHING OF ZINC AND MANGANESE FROM USED UP …
manganese is recovered. It was found that the rate of zinc leaching is higher than that of manganese and the rate of both reactions is increasing with temperature as well as with a decrease of the solid/liquid ratio. keywords: used up batteries, zinc, manganese, leaching, sulfuric acid _____ * Czestochowa University of Technology, Department of ...
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Sulfuric Acid Leaching of Smelter Matte
Leach liquors resulting from an oxidative leach of copper matte with sulfuric acid and manganese dioxide contained (in grams per liter) 0.5 cobalt, 1.2 nickel, 33 copper, 35 manganese, 2.3 iron, and 0.29 arsenic. The nickel matte leach liquors contained (in grams per liter) 2.5 cobalt, 20 nickel, 28 copper, 50 manganese, 1.7 iron, and 7 arsenic.
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KINETIC STUDY OF THE MANGANESE MINE TAILINGS …
A kinetic study of the leaching of manganese mining residue by sulfuric acid and potassium oxalate has been investigated. The effects of the reaction agitation speed, manganese ore particle size, acid concentration, oxalate concentration and temperature on manganese rate dissolved. The leaching rates are significantly influenced by the
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Initial Investigation into the Leaching of Manganese from ...
Han et al. [ 12] conducted reactor-based leaching tests of marine nodules with sulfuric acid, and observed that low levels of manganese recovery (1%) were obtained with H 2 SO 4 at room temperature (25 °C). They concluded that high temperature is required during the leaching of marine nodules in order to improve recovery, selectivity and kinetics.
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Pressure Sulfuric Acid Leaching of Manganese-Rich Slag ...
12%Sulfuric acid (AR) with a concentration of 96% w /w and a density of 1.84 g/mL was used as the leaching agent in all experiments. Distilled water was used throughout the experiments for the solution preparation. The particle sizes of manganese-rich slag and pyrite both pass through sieve: 75–80 μm. Reactor and Experimental Procedure
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Banana peel reductant for leaching medium grade manganese ...
In this investigation, manganese has been produced from medium grade manganese ore from Karangnunggal mine (West Java, Indonesia). The effects of weighed amount of banana peels on the structural and leaching properties have been studied. The material's properties have been characterized on the basis of the experimental data obtained using X-ray fluorescence (XRF), X-ray diffraction (XRD ...
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Effect of Key Parameters on the Selective Acid Leach of ...
of nickel from MHP involves stabilising manganese and cobalt into the solid phase using an oxidant. This paper describes a batch reactor study investigating the timing of acid and oxidant addition on the rate and extent of nickel, cobalt, manganese leached from industrial MHP. ... Leaching followed by oxidation (sulfuric acid addition followed ...
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Manganese ore tailing: Optimization of acid leaching ...
Manganese recovery from industrial ore processing waste by means of leaching with sulfuric acid was the objective of this study. Experimental conditions were optimized by multivariate experimental design approaches. In order to study the factors affecting leaching, a screening step was used involving a full
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A Comparative Study on Acid Leaching of Low Grade ...
Local pyrolusite ore from Om‐Bogma, Sinai, has been treated by sulfuric acid leaching process using either sawdust (C 6 H 10 O 5) n or lactose (C 12 H 22 O 11) as reducing agent to produce manganese sulfate. The manganese recoveries were 92.5 and …
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Beneficiation and Sulfuric Acid Leaching of Manganese Ore ...
The beneficiation of low-grade manganese ore is investigated using applied magnetics separation, multi-gravity separator, shaking table, flotation methods, and sulfuric acid leaching. The manganese content in the ore sampled from the Unagad deposit is 17.31%. The best option and high result among beneficiation experiments is the use of a multi-gravity...
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Micellar mediated selective leaching of manganese nodule ...
Application of surfactants during acid leaching of manganese nodules are described based on results from leaching studies. The factors that affected the sulfuric acid leaching of the manganese nodules in the presence of various surfactants were investigated.
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