A process for beneficiation of low-grade manganese ore and …
In order to economically utilize low-grade manganese ores in Indonesia, a process is proposed to produce high-grade manganese concentrate and prepare …Web
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In order to economically utilize low-grade manganese ores in Indonesia, a process is proposed to produce high-grade manganese concentrate and prepare …Web
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Magnetic separation is an effective strategy for the upgrading of a variety of lean ores, including the beneficiation of low-grade manganese ores. This work reviews 24 studies on the magnetic separation of manganese …Web
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Increased demand for manganese alloys and compounds for various industries created a dire need of Manganese (Mn) ore beneficiation technology. Significant variability in ore grades and mineralogical characteristics impose challenges during selection of a proper beneficiation process to upgrade the low-grade manganese ores.Web
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1. Introduction. Manganese is a typical ferrous and strategic metal that is widely used in steel production, nonferrous metallurgy, dietary additives, medicine, batteries and fine chemicals [[1], [2], [3]].With the rapid consumption of rich manganese ore resources, low-grade ferruginous manganese ores have become indispensable …Web
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Characterization and calcination behavior of a low-grade manganese ore, as a part of Mn ferroalloys production, was studied by XRF, ex-situ XRD, in-situ XRD, and …Web
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In order to utilize low-grade manganese ore resources effectively, a hydrometallurgical process was developed for manganese extraction in dilute sulfuric acid medium, and the kinetics of leaching ...Web
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Manganese is an important industrial mineral and high-grade manganese ore deposits are constantly diminishing due to its widespread industrial use. Consequently, attempts are being made to develop economically feasible routes to upgrade low-grade manganese ores (LGMO).Web
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In this study, tartaric acid was identified as an efficient reductant for the reductive leaching of manganese from low-grade pyrolusite ore in an H 2 SO 4 solution. The effect of H 2 SO 4 concentration, tartaric acid concentration, time, and temperature on the leaching efficiency of low-grade pyrolusite ore was investigated. Evidently, when …Web
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The raw material used in this study was low-grade manganese clay with a grade of 6.1% Mn, and the main manganese mineral was pyrolusite. FeCl 2 ·4H 2 O and a dilute hydrochloric acid solution were selected as the most effective reductant and solvent, and the leaching efficiency of manganese and iron was greater than 92% and 70%, …Web
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Low-grade manganese carbonate ores (≤14%) becomes gradually the main resources for exploitation and applications in China according to national mineral resources survey [1, 2]. Therefore, the electrolytic deposition technique of rhodochrosite faces great challenges including low electrolysis efficiency, high-resource input and high-pollution ...Web
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The relation between the magnetic separation behavior and magnetic properties of a low-grade manganese ore was analyzed before and after treatment by direct reduction with coal. It was found that raw ore with an initial average grade of 10.39% Mn and consisting of diamagnetic and paramagnetic minerals can be concentrated by …Web
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Low grade manganese ore is beneficiated with hydrochloric acid as the leaching agent to obtain a manganese concentrate. After leaching by hydrochloric acid, the impurities of low-grade manganese ore are easily dissolved into the leach liquor, and high-grade manganese concentrate is left in the solid phase, in which more than 99% …Web
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Manganese alloys are important raw materials for steelmaking. However, selective mining of high-grade manganese ore resources has resulted in a scarcity of these high-grade Mn ores (Mn: >42; Mn/Fe: >5). The present research work is carried out to explore a new smelting reduction process to produce high-Mn/Fe synthetic Mn ore from …Web
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In this paper, a low-grade manganese ore in Yongzhou of Hunan Province in China, in which manganese mainly existed in the form of MnCO 3, was leached in sulfuric acid medium without reductants. The effects of grinding fineness, sulfuric acid concentration, liquid-to-solid ratio, agitation rate and leaching time on the leaching efficiency were ...Web
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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 ...Web
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XPS spectra of low-grade pyrolusite before and after microwave heating (A) and the best fit of Mn2p in raw pyrolusite (B); the best fit of Mn2p in microwave treated pyrolusite at 450°C for 10 min ...Web
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Manganese is a ferrous ore with growing significance in steel industries worldwide for the purpose of production of various alloys, thereby depriving low-and high-grade deposits and encouraging ...Web
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The hydrometallurgical strategy of extracting Mn from low-grade Mn ores has attracted attention for the production of electrolytic manganese metal (EMM). In this work, the reductive dissolution of low-grade MnO2 ores using toxic nitrocellulose acidic wastewater (NAW) as a reductant was investigated for the first time. Under the optimized …Web
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Manganese ferrite (MnFe 2 O 4) has been synthesized via solid state reaction route.The chemical reagents used in the present work were low grade manganese ore and chemical grade ferric oxide (Fe 2 ...Web
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The grade and leaching method causes a large amount of Mn-rich residue to be stockpiled. Due to the low-grade manganese ore, the electrolytic manganese …Web
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The raw material used in this study was low-grade manganese clay with a grade of 6.1% Mn, and the main manganese mineral was pyrolusite. FeCl 2 ·4H 2 O and a dilute hydrochloric acid solution were selected as the most effective reductant and solvent, and the leaching efficiency of manganese and iron was greater than 92% and 70%, …Web
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Low-grade ferruginous manganese ores with Mn < 34% and Mn/Fe < 2.5 needs to be upgraded to enrich their manganese content before using them in the manufacturing of ferroalloys [].V Singh et al. [] briefly reviewed the different methods used to upgrade manganese ore resources from various parts of the world.Owing to the similar …Web
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The selective reduction of low-grade manganese ore followed by magnetic separation was proposed to produce rich-manganese ore. The optimized parameters include a roasting temperature of 1050°C, a ...Web
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Manganese dioxide is typically reduced to a bivalent state before being extracted; here, sulfur is considered an efficient reductant and sulfur–based reduction has been industrialized in China. In this study, …Web
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The manganese content in the extractable ores differs from 20 to 60%, however, the rapid depletion of high-grade manganese deposits increased the usage of …Web
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Conclusions • The carbothermal reduction process of low-grade manganese ore applying microwave heating showed that the iron oxide... • Both the charcoal ratio …Web
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OF IRANIAN LOW-GRADE MANGANESE ORE. A. MEHDILO, M. IRANNAJAD *, M. R. HOJJATI- RAD. * Corresponding author: Department of Mining and Metallurgical Eng., Amirkabir University of Technology, Tehran ...Web
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Researchers have carried out some studies on the extraction of manganese oxides and manganese from low-grade manganese ore by an effective and economical process. Manganese ore can exist stably in an acidic or alkaline oxidizing environment [13], [14]. Therefore, the extraction of manganese is usually carried out under reducing …Web
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Low-grade ferruginous manganese ore was used to generate the MnSO 4 electrolyte suitable for the electrowinning of EMD. Bench-scale electrowinning test work was carried out to study the effect of variation in current density, electrolyte temperature, anode-to-cathode distance, feed Mn concentration and flow rate, electrolyte's initial pH, and ...Web
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This paper presents an innovative technology that has been developed for the smelting of Egyptian low-grade manganese ore to produce low-manganese pig iron …Web
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Low-grade manganese ores contain cryptomelane, romanechite, amorphous manganese hydroxides, birnessite, pyrolusite, hematite, quartz, kaolinite, illite (hydromuscovite), montmorillonite and …Web
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