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Sulfuric acid leaching of ocean manganese nodules using ...

May 01, 2001  The sulfuric acid leaching of manganese nodules using hydrogen peroxide (H20z) as a reducing agent, developed by the United States Bureau of Mines (Allen et al., 1991), seems to be a promising process route. The leaching rate is very fast and metal extraction generally completes in about 5 minutes. The oxidation products of the hydrogen ...

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Reductive leaching of manganese from low-grade manganese ...

Aug 01, 2008  A reductive leaching process for a low-grade manganese ore has been successfully demonstrated using a mixture of sulfuric acid and cane molasses as reductants. The results indicate that the leaching efficiencies of Mn, Fe and Al increase

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CN1884099A - Method for preparing manganese sulfate by ...

The invention discloses a new preparing method of manganese sulfate through manganese oxide in the manganese ore in the leaching manganese ore extracting and manufacturing technological domain, which comprises the following steps: grinding manganese ore; moulding ore paste through water; adding sulfuric acid and waste molasses in the ore paste; stirring at 40-100 deg.c to obtain leaching ...

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Initial Investigation into the Leaching of Manganese from ...

Han et al. 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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Leaching of Manganese from Marine Nodules at Room ...

sulfuric acid concentration is less important than Fe concentration in dissolving Mn. The Mn extraction rate increases with a higher agitation speed [13–15]. Jiang et al. [13] evaluated the kinetic aspects of manganese and silver extraction during leaching of pyrolusite in sulfuric acid

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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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Recovery of pure MnSO4∙H2O by reductive leaching of ...

Sep 14, 2011  Jiang et al., 2003, Jiang et al., 2004 studied the leaching of manganese ore by sulfuric acid solution in the presence of hydrogen peroxide. They found that hydrogen peroxide is critical to the simultaneous leaching of manganese at room temperature, and it plays a main role as a reducing agent for manganese dioxide.

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(PDF) Reductive leaching of manganese from low-grade ...

[Show full abstract] determined for 10g of manganese dioxide ore as corncob amount of 3g, ore size of 75μm, sulfuric acid concentration of 1.9mol/L, leaching temperature of 85°C for 60min. In a ...

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Hydrometallurgical Process and Kinetics of Leaching ...

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 time on the total Mn (TMn), MnO2 and MnCO3 leaching ...

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Reductive Dissolution of Manganese Ore in Sulfuric Acid in ...

The leaching efficiency of ~98% was achieved at 2h leaching time, 4 g banana peel amount, 120oC leaching temperature, 5 g manganese ore amount and 15 vol.% sulfuric acid concentration.

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Sulfuric acid leaching of ocean manganese nodules using ...

May 01, 2001  Sulfuric acid leaching of ocean manganese nodules was carried out using aromatic amines as reducing agents. Seven aromatic amines were tested and they were: aniline, o-phenylene diamine, o-aminobenzoic acid, o-nitroaniline, p-amino toluene, p-aminobenzene sulfonic acid and l

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CN1884099A - Method for preparing manganese sulfate by ...

The invention discloses a new preparing method of manganese sulfate through manganese oxide in the manganese ore in the leaching manganese ore extracting and manufacturing technological domain, which comprises the following steps: grinding manganese ore; moulding ore paste through water; adding sulfuric acid and waste molasses in the ore paste; stirring at 40-100 deg.c to obtain leaching ...

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Reductive-atmospheric leaching of manganese from ...

Apr 23, 2019  The manganese recoveries were 100% when tannic acid and oxalic acid used as reducing agent, using 1 M of sulfuric acid and 5% of pulp density at 30°C of leaching temperature, 150 rpm of shaker speed, atmospheric pressure, and 8 hours of leaching period.

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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. 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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Kinetics of manganese leaching from an iron-rich manganese ...

The kinetics of reductive leaching of manganese from iron-rich manganese dioxide ore (IRMDO) using bagasse pith as a reductant in the presence of sulfuric acid was investigated. The effects of reductant type, stirring speed, ore particle size, leaching temperature, sulfuric acid

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Leaching of Manganese from Marine Nodules at Room ...

sulfuric acid concentration is less important than Fe concentration in dissolving Mn. The Mn extraction rate increases with a higher agitation speed [13–15]. Jiang et al. [13] evaluated the kinetic aspects of manganese and silver extraction during leaching of pyrolusite in sulfuric acid

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(PDF) Reductive leaching of manganese from low-grade ...

[Show full abstract] determined for 10g of manganese dioxide ore as corncob amount of 3g, ore size of 75μm, sulfuric acid concentration of 1.9mol/L, leaching temperature of 85°C for 60min. In a ...

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Manganese - Wikipedia

This reduces all of the manganese ore to manganese oxide (MnO), which is a leachable form. The ore then travels through a grinding circuit to reduce the particle size of the ore to between 150 and 250 μm, increasing the surface area to aid leaching. The ore is then added to a leach tank of sulfuric acid and ferrous iron (Fe 2+) in a 1

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Banana peel reductant for leaching medium grade manganese ...

Mar 17, 2017  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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Kinetics of reduction leaching of manganese dioxide ore ...

W) and sulfuric acid concentration (C H) on the leaching efficiency of manganese were studied. The leaching efficiency of manganese based on the shrinking core model was found to be controlled by diffusion through the ash/inert layer composed of the associated minerals. The apparent activation energy is 15.18 kJ mol 1. The experimental ...

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Leaching of manganese from low grade manganese ore using ...

Leaching studies of low-grade Joda manganese ore containing 24.7% Mn and 28.4% Fe were carried out at high temperature and atmospheric pressure using oxalic acid as reductant in sulphuric acid

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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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Sulfuric Acid Leaching of Zinc and Manganese from Spent ...

Characteristics on the sulfuric acid leaching of zinc and manganese from the spent zinc-carbon battery powders obtained by cushing and magnetic separation, were investigated with the variation of ...

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Initial Investigation into the Leaching of Manganese from ...

Han et al. 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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Study of the Leaching of a Manganese Mining Residue by ...

Study of the Leaching of a Manganese Mining Residue by Na 2 SO 3 in Sulfuric Acid Solution - written by A. Alaoui, K. El Kacemi, S. Kitane A published on 2013/08/30 download full article with reference data and citations

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Reductive-atmospheric leaching of manganese from ...

Apr 23, 2019  The manganese recoveries were 100% when tannic acid and oxalic acid used as reducing agent, using 1 M of sulfuric acid and 5% of pulp density at 30°C of leaching temperature, 150 rpm of shaker speed, atmospheric pressure, and 8 hours of leaching period.

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Pressure Sulfuric Acid Leaching of Manganese-Rich Slag ...

The leaching slurry presented a good solid-liquid separation characteristic. The silicic acid formed during sulfuric acid leaching manganese silicates was converted to filterable dehydrated SiO2 particles which precipitated in the residue under the condition of higher temperature with higher pressure.

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Kinetics of manganese leaching from an iron-rich manganese ...

The kinetics of reductive leaching of manganese from iron-rich manganese dioxide ore (IRMDO) using bagasse pith as a reductant in the presence of sulfuric acid was investigated. The effects of reductant type, stirring speed, ore particle size, leaching temperature, sulfuric acid

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Reductive leaching of manganese from low-grade pyrolusite ...

Abstract. 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 ...

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Leaching of manganese from low grade manganese ore using ...

Leaching studies of low-grade Joda manganese ore containing 24.7% Mn and 28.4% Fe were carried out at high temperature and atmospheric pressure using oxalic acid as reductant in sulphuric acid

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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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Minerals Free Full-Text Leaching of Manganese from ...

Based on the results obtained from a previous study investigating the dissolution of Mn from marine nodules with the use of sulfuric acid and foundry slag, a second series of experiments was carried out using tailings produced from slag flotation. The proposed approach takes advantage of the Fe present in magnetite contained in these tailings and is believed to be cost-efficient.

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Kinetics of silver leaching from manganese-silver ...

Kinetics of silver leaching from a manganese-silver associated ore in sulfuric acid solution in the presence of H2O2 has been investigated in this article. It is found that sulfuric acid and hydrogen peroxide have significant effects on the leaching rate of silver. The reaction orders of H2SO4 and H2O2 were determined as 0.80 and 0.68, respectively.

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Dilute Sulfuric Acid Leaching of Manganese Nodules using ...

Pacific Ocean manganese nodules were leached in dilute sulfuric acid solutions using hydrogen peroxide as a reductant. High grade manganese nodules were crushed to minus 200 mesh, and treated to extract metals under the conditions, where pulp density was 1g/l, sulfuric acid concentration ranged from 3.5×10-3 to 3.5×10-2 mol/l, hydrogen peroxide concentration ranged from 1.7×10-3 to

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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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Reduction Leaching of Manganese Dioxide Ore Using Black ...

sulfuric acid solution. The effect of parameters on the leaching efficiency of manganese was the primary focus. Exper-imental results indicate that manganese leaching efficiency of 97.57% was achieved under the optimal conditions: weight ratio of black locust to manganese dioxide ore (WT) of 4:10, ore particle size of 63 μm, 1.7 molL-1 H 2 SO4

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Recovery of Manganese from Ferromanganese Slag by Leaching ...

Nov 16, 2020  Recovery of Manganese from Ferromanganese Slag by Leaching with Sulphuric Acid G.V.S. Sarma P. Ravi Shankar Raju K.V. Ramesh * G.M.J. Raju

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