A rich manganese ore from Chalkidiki (Greece) was leached in aqueous SO 2 solutions at atmospheric pressure and ambient temperature to extract more than 95% Mn after 10 min. Process conditions, such as SO 2 concentration, time, pH, agitation rate, temperature and pulp density were investigated. Low impurities of iron in the pregnant …
Material. The low-grade manganese ore used in this study was obtained from Wan Yuan, Sichuan Province, China. The chemical composition and X-ray diffraction pattern are given in Table 1 and Fig. 2, respectively.The material is a typical low-grade manganese carbonate ore, and the mass fraction of manganese is only 17.83%.
The present study focuses on the leaching of MnO2 form manganese ore by acid leaching method using glucose as a reducing agent. The leached MnO2 was used to prepare nano LaxCa1-xMnO3 and LaxSr1 ...
Selective-reductive leaching of manganese from low-grade manganese ore using tannic acid as a reductant in acidic media was demonstrated by XRD, SEM-EDX …
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 medium.
Leaching of manganese ore using oxalic acid-producing microorganisms has been reported (Stone, 1987). Chemical leaching of Mn ore using oxalic acid may …
In the present investigation results on the use of dried leaves as a reductant for manganese ore leaching is reported. A complete flow-sheet consisting of steps such as reductive acid leaching, enrichment of leach solution by recycling, iron removal and crystallization has been developed for the preparation of manganese sulphate …
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 W) and sulfuric acid concentration (C …
1. Introduction. Manganese(Mn) is a national strategic resource and is widely used in various industrial applications, wherein 90 % of the Mn is applied in the iron and steel manufacturing process, and the rest is used in the production of fertilizers, non-ferrous metals, chemistry, glass and diet [1], [2], [3].With the gradual exhaustion of high-quality …
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 …
The present study focuses on the leaching of MnO2 form manganese ore by acid leaching method using glucose as a reducing agent. The leached MnO2 was used to prepare nano LaxCa1-xMnO3 and LaxSr1 ...
A fungal strain, Penicillium citrinum was isolated from top soil of Joda East manganese mine area, Tata Iron and Steel Company, Orissa to evaluate the growth kinetics and effect of various parameters on in-situ leaching ofManganese ore with P.citrinum. Bioleaching is technologically feasible for extraction of manganese from low grade ores (containing …
Manganese was extracted from leaching low-grade manganese ore in sulfuric acid medium. The effects of granule diameter, leaching time, liquid/solid ratio …
The increasing global demand for Mn necessitates cost-effective recovery methods applicable to low- and medium-grade ores. Reductive bioleaching has …
Manganese leaching and recovery from pyrolusite ore, was investigated by using H 2 SO 4 as a leachant and H 2 O 2 as a reducing agent. The effects of agitation, H 2 O 2 concentration, H 2 SO 4 concentration, liquid/solid mass ratio, leaching time and reaction temperature on manganese recovery were studied. The optimal leaching …
Abstract Manganese was extracted from leaching low-grade manganese ore in sulfuric acid medium. The effects of granule diameter, leaching time, liquid/solid ratio (V/W) and the concentration of sulfuric acid were investigated through orthogonal and single factor experiments. The experimental results showed that the optimal leaching condi-
The effect of reaction temperature on the leaching efficiency of Mn 2+ is shown in Fig. 1 b. The leaching efficiency of Mn 2+ increased from 29.56% to 71.84% as the temperature increased from 50 °C to 80 °C, and reached 73.46% at 90 °C. The leaching efficiency of Mn 2+ increased with reaction temperature because the thermal …
Direct leaching of manganese ore with hydrochloric acid. In our previous work, the direct leaching of low-grade manganese ore with hydrochloric acid has been studied in detail (Lv et al. 2019). This research is an extension of previous work. In this paper, a different low-grade manganese ore consisting mainly of calcite and pyrolusite …
enriched manganese ore were 58.83%, 26.57%, and 38.33%, respectively, when the grade of 0.074 mm fraction with 80% of manganese ore. As a result of the shaking table tests, the manganese content in the concentrate was 35.84% and, the metal recovery and yield were 50.57% and 24.43%, respectively, for the manganese ore fraction
The leaching of manganese (Mn) ore in sulphuric acid (H2SO4) under reductive conditions has been studied. The effects of leaching parameters such as ore/reductant mass ratio, acid concentration, ore particle size, solid/liquid ratio, leaching time and different reductant potential on the maximum recovery of manganese have been …
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(SiO4), calcite (CaCO3), and -quartz (SiO2). X-ray diffraction and energy dispersive spectroscopy …
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 medium. The experiments were designed according to 2 4 full factorial design, and regression equations for extraction of manganese, iron and …
The inefficient leaching of manganese is the main factor hindering the commercialization of the reduction process during manganese recovery using pyrite as the reducing agent. Hence, a new method for improving recovery efficiency and reducing the cost is required. This study uses microwave heating as a strengthening method to …
Manganese extraction from a low-grade ore was investigated using cane molasses as a reducing agent in dilute sulfuric acid medium. The effects of concentrations of cane molasses and sulfuric acid, leaching temperature as well as reaction time were discussed.The results showed that high manganese recovery with low Fe and Al …
The leaching efficiency of Xiangxi manganese oxide ore reached 99.8% under the optimal condition which was determined as follows: manganese oxide ore to waste tea mass ratio of 10:1, sulfuric acid ...
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 ...
The increasing global demand for Mn necessitates cost-effective recovery methods applicable to low- and medium-grade ores. Reductive bioleaching has emerged as a promising technique for Mn extraction from low-grade ores. This study aimed to simultaneously bioleach both Cu and Mn from low-grade ore obtained from Boleo, …
1. Introduction. Manganese is an irreplaceable material in the steel industry (Sun et al., 2020, Sahoo et al., 2001).At present, about 95% of the manganese produced every year is used in the steel industry as a unique deoxidizing and desulfurizing agent to improve the quality of steel (Jacob et al., 2020, Liu et al., 2019).With the depletion of …
In the present investigation results on the use of dried leaves as a reductant for manganese ore leaching is reported. A complete flow-sheet consisting of steps such as reductive acid leaching ...
The reductive leaching of manganese from a low-grade manganese oxide ore was investigated by using pretreated sawdust as …
Similar to the leaching of manganese ores, the reaction product of SO 2 was mainly sulfate with a proportion of dithionate (S 2 O 6 2−), depending on specific …
Reductive leaching of manganese from low-grade manganese ore using xanthan gum wastewater as reductant. Xi Xiao-la. Environmental Science, Chemistry. …
The maximum leaching efficiency of manganese can reach above 91% under the optimal experimental conditions. The experimental results demonstrated that lignin is a low cost, renewable and environmentally benign reductant for leaching low-grade manganese ore.
Manganese released from the piled manganese ore wastes is a great threat to the local ecosystem and human health. The mechanism and dynamic characteristics of manganese release from the manganese ore wastes were studied based on the static and dynamic experiments. The concentration of manganese in the …
oC and 70 oC actually shows a decrease in manganese recovery value. It can concluded that the increase of temperature in the non-reducing leaching of manganese ore does …
The reductive leaching of manganese oxide ore in aqueous methanol–sulphuric acid was investigated. Studies were conducted at low (30 and 70°C) and high (120–170°C) temperatures, using different acid (0.005–0.30 M H 2 SO 4) and methanol (0–50 vol%) concentrations.Results showed that satisfactory levels of …
Since the pH of the final solution of manganese sulfate was approximately 7.0 and the average recovery of manganese was 95.5%, the leaching of 0.1000 g of manganese ore waste with sulfuric acid produced 0.0972 g of a solid containing manganese sulfate and other elements such as Ca, Mg and K, which can be …
Mn contents of these ores ranged from 2 to 30 pct. Column-leaching of 11 ore samples containing primarily pyrolusite, psilomelane, and/or wad resulted in 73- to 97-pct Mn extraction, with an average extraction of 86 pct. Column leaching of three ore samples containing primarily manganese carbonates, two ore samples containing …
The reduction leaching process of manganese ore tailing: First, a 250 mL three-necked flask was immersed in a constant temperature water bath, and furnished with a mechanical stirring device, a thermometer, and a reflux condenser. The leaching agent (hydrochloric acid, HCl) was added to the three-necked flask and heated up to the …
Manganese was leached from a low-grade manganese ore (LGMO) using banana peel as the reductant in a dilute sulfuric acid medium. The effects of banana peel amount, H2SO4 concentration, reaction temperature, and time on Mn leaching from the complex LGMO were studied. A leaching efficiency of ∼98% was achieved at a …