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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 …

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Study of the Leaching of a Manganese Mining Residue by ...

Aug 30, 2013· Typical studies on leaching of manganese ores with SO2 or sulfite salts are summarised in (Tab.1). Das et al.[14, 15] proposed a random nucleation equation for the kinetics of extraction of manganese from low-grade oxidised ores by FeSO4. Many studies have been carried out to leach manganese oxides and sulfide minerals simultaneously in an acid ...

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Phase, Microstructure and Beneficiation of Manganese Ore ...

Manganese extraction of 88.93 (wt%) was achieved for a leaching time of 60 minutes at 120°C using 5% (v/v) H2SO4 concentration for 10 g Mn ore and 5 g sawdust. The results demonstrate that sawdust is a low cost, renewable and non-hazardous reducing agent in comparison to other available reagents.

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Reductive Acid Leaching of Low Grade Manganese Ores

Our study on acid leaching of Manganese ore with Ox-alic acid and Citric acid gives a comparative data about leaching, which shows that oxalic acid has a better lea- ching potential than citric acid. Efficiency of acid leach- ing can be calculated by using standard graph as shown in . Figure 1. 3.1. Effect of Oxalic Acid on Manganese Leaching

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Agus Prasetya et al - Institute of Physics

on leaching of Kulon Progo low grade manganese ore were determined. 2. Materials and Method . The low grade manganese ore used in present study was supplied from the source in Kulon. P. rogo, Yogyakarta. First of all the ore were crushed and sieved with various sizes of -200 mesh and -70 until + 100 mesh.

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Selective In Situ Leach Mining of Manganese Ores

Oct 01, 2018· Potter et al. (1982) reported six U.S. locations with significant low grade manganese ore deposits. Pahlman and Khalafalla (1988) reported on SO2 leaching of manganese ores, including a number of samples from the above six deposits (Table 1). In addition to manganese mineralogy, Table 2 lists the principal gangue mineralogy.

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Kinetics on Co-extraction of Vanadium from Stone Coal and ...

The effects of ore distribution ratio,liquid to solid ratio,and leaching temperature on the co-leaching efficiency of vanadium and manganese are investigated. The research shows that some references and basis for the industrial comprehensive utilization of stone coal and low-grade pyrolusite will get the high efficient co-extraction of vanadium ...

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Initial Investigation into the Leaching of Manganese from ...

Kanungo, S.B. Rate process of the reduction leaching of manganese nodules in dilute HCl in presence of pyrite: Part II. Leaching behavior of manganese. Hydrometallurgy 1999, 52, 331–347. [Google Scholar] Zakeri, A.; Bafghi, M.S.; Shahriari, S. Dissolution of manganese dioxide ore in sulfuric acid in the presence of ferrous ion. Iran. J. Mater.

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(PDF) Hydrometallurgical Processing of Manganese Ores: A ...

Effects of the mass ratio of manganese ore to sawdust, roasting temperature and time, leaching temperature and time, leaching agent concentration and liquid-solid ratio were studied. 97.71% of ...

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Kinetic Study of the Leaching of Low-Grade Manganese Ores ...

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. It was found that the leaching …

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(PDF) A Comparative Study on Acid Leaching of Low Grade ...

Maximum manganese recovery 92.5% in leaching step was achieved at -100 mesh particle size, 90°C, 90 min, 30% acid concentration, 1.5 acid/MnO 2 stoichiometric ratio, 0.5 g/g sawdust/ore weight ratio, and 700 rpm agitation rate in sawdust case, while manganese recovery was 90.50% in lactose case, the optimum leaching conditions were; -100 mesh ...

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Reductive leaching of low-grade manganese ore with pre ...

Cornstalk is usually directly used as a reductant in reductive leaching manganese. However, low utilization of cornstalk makes low manganese dissolution ratio. In the research, pretreatment for cornstalk was proposed to improve manganese dissolution ratio. Cornstalk was preprocessed by a heated sulfuric acid solution (1.2 M of sulfuric acid concentration) for 10 min at 80°C.

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(PDF) Leaching of Manganese ore from Northeastern Vietnam ...

Part I: Leaching of ores/secondary materials and recovery of electrolytic/chemical manganese dioxide By Chu Cheng Saini-Eidukat, B., Marozas, D., Blake, R., and Adamson, N. (1993) Implications of rock mineralogy and texture on the feasibility of in situ leach mining of Mn-bearing iron formations of central Minnesota, USA.

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Characterization of Sumbawa manganese ore and recovery of ...

May 15, 2018· The aims of this research were to study the leaching process of manganese ore which originated from Sumbawa, Indonesia and its characterization. A high grade Indonesian manganese ore from Sumbawa, West of Nusa Tenggara was characterized by X-Ray Fluorescence (XRF). The result showed composition of 78.8 % Mn, 17.77% Fe and the rest …

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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 …

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SULPHURIC ACID LEACHING OF LOW/MEDIUM GRADE …

phases associated with various manganese ore samples were pyrolusite, quartz/silica [23, 37]. 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.

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KINETIC STUDY OF THE MANGANESE MINE TAILINGS …

leaching of manganic-ferrous ores containing tetravalent manganese using organic reductants, including sawdust [1], glucose, sucrose [2], lactose [3], glycerine [4]. Oxalic acid can also be used as a reducing agent for manganese extraction from manganese dioxide ore [5, 6]. Leaching of manganese ore

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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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Process for acid leaching of manganese oxide ores aided by ...

A method of processing manganese ore by adding the ore to an aqueous solution of acid and H 2 O 2 to form a leach pulp. The leach pulp is agitated for a predetermined time period a Process for acid leaching of manganese oxide ores aided by hydrogen peroxide - The United States of America, as Represented by the Secretary of the

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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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US2663618A - Leaching manganese ore - Google Patents

Leaching manganese ore Download PDF Info ... Prior art keywords ore column leaching ammonia wet 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.)

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Hydrometallurgical Processing of Manganese Ores: A Review

In the hydrometallurgical processing of manganese from its ore, the leach liquors often contain divalent ions such as iron,, copper, nickel, cobalt and zinc along with other manganese impurities which make manganese very difficult to separate. The processes employed for solu-

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LEACHING OF MANGANESE ORES USING CORNCOB AS …

Leaching of manganese ores using corncob as reductant in H 2 SO 4 solution 57 of reducing agents and acids (Pagnanelli et al., 2004). Coal is used as a reductant in traditional technology in order to convert manganese dioxide to manganese oxide which can be leached by sulfuric acid. This method produces smoke, dust, oxysulfide,

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Kinetic Study of the Leaching of Low-Grade Manganese Ores ...

Several authors have evaluated the use of cellulose as a reductant in manganese leaching [11 13,15]. Tang et al. [12] reported that the leaching efficiency of Xiangxi manganese oxide ore reached 99.8% under the optimal conditions: mass ratio …

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Leaching of manganese ore with aqueous sulphur dioxide ...

Leaching of manganese ore with aqueous sulphur dioxide solutions PRAFULLA R RAISONI and SHARAD G DIXIT Department of Chemical Technology, University of Bombay, Matunga, Bombay 400 019, India Abstract. Manganese can be easily leached from chemically inert manganese ore by aqueous solutions of SOz.

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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 (C6H10O5)n or lactose (C12H22O11) as reducing agent to produce manganese sulfate. The manganese recoveries were 92.5 and 90.5% at sawdust and lactose respectively. Un minerai de pyrolusite local d'Om-Bogma, au Sinai, a ete traite par un procede …

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Reduction Leaching of Manganese Dioxide Ore Using Black ...

the leaching of manganese dioxide ore, the experimental data were analyzed on the basis of the shrink ing core model [13,21]. If the reac-tion rate is controlled by inner diffusion, its rate equation is as fol-lows: (3) If the reaction is controlled by the surface reaction, the rate equa-

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Dual Leaching Method for Recovering Silver and …

After leaching an amount of manganese that would simulate the recovery in a heap or in situ leaching operation (65 to 95 pct), the material rema1n1ng in the column was rinsed with a 0.3-wt-pct-NaOH TABLE 1_ - Manganese ore characteri3ti~s' County and Manganese minerals2 Principal gangue minerals2 State

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Thermophilic bacterial leaching of manganese dioxide ...

Sep 01, 1992· Thermophilic bacterial leaching of low-grade manganese oxide ore was, demonstrated at 50°C and 70°C. A static culture system was used with cane molasses as the nutrient source. By employing batch cultures, with an acid wash to redissolve adsorbed Mn 2+ at completion of each batch, the bacterial reduction could be driven to completion.

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Study in reduction-roast leaching manganese from low-grade ...

The leaching recovery of manganese reached 90.2% under the optimal condition which was determined as manganese dioxide ore to cornstalk weight ratio of 10:3, roasting temperature of 500 °C for 80 min, leaching stirring speed of 400 r/min, sulfuric acid concentration of 3 mol/L, leaching temperature of 50 °C for 40 min.

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FUNGAL LEACHING OF MANGANESE ORE

FUNGAL LEACHING OF MANGANESE ORE C. Acharya, R.N. Kar, L.B. Sukla and Vibhuti N. Misra Regional Research Laboratory, Bhubaneswar-751 013. Email : [email protected] (Received 16 April 2004 ; in revised form 30 June 2004) ABSTRACT Bioleaching is technologically feasible for extraction of manganese from low grade ores (containing …

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Study on Adding Ammonium Hydrogen Fluoride to Improve ...

Selective-reductive leaching of manganese from low-grade manganese ore using tannic acid as a reductant in acidic media was demonstrated by …

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A Kinetic Study of the Leaching of Iron and Manganese from ...

A kinetic study of the leaching of iron and manganese from powdered tantalite-columbite ore by Hydrochloric Acid (HCl) and Sulphuric Acid (H 2 SO 4) solutions has been carried out. The effects of (a) particle size ranging from 63 to 250 μm (b) stirring speed ranging from 180 to 540 min -1 (c) acid concentration ranging from 4.0 to 10.0 M (d ...

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