Mn was extracted from low-grade manganese dioxide ore by reductive leaching. • Electric field enhancement leaching process was developed. • The macroscopic kinetic equation was established, and the Ea was 19.68 kJ/mol.. The cycling of Fe 3 + and Fe 2 + ensure the high leaching efficiency of the process.
Enhanced leaching of manganese from low-grade pyrolusite using ball milling and electric field. Author links open overlay panel Zhenggang Luo a 1, Jiancheng Shu a 1, ... Recovery of pure MnSO 4 ·H 2 O by reductive leaching of manganese from pyrolusite ore by sulfuric acid and hydrogen peroxide. Int. J. Miner. Process., 100 (3) …
The sulfite leaching of an Italian manganese ore has been carried out to determine the feasibility of extracting manganese by percolation leaching. Aqueous SO 2 has been found to be an effective leachant for manganese dissolution owing to fast dissolution kinetics and low temperatures. Bench-scale experimental results have …
DOI: 10.1016/J.HYDROMET.2009.05.006 Corpus ID: 95248348; Kinetics of reductive leaching of manganese oxide ore with molasses in nitric acid solution @article{Lasheen2009KineticsOR, title={Kinetics of reductive leaching of manganese oxide ore with molasses in nitric acid solution}, author={Taysser A. Lasheen and Mona …
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 90.5% at sawdust and lactose respectively.
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.
For all systems tested, leaching efficiencies based on removal of manganese from ore ranged from 83 to 90 percent. Also included in phase 1 was a brief study of residue agglomeration. The purpose was to show that pellets having both good green and excellent fired strength can be made readily from the leached umber residue.
Application of statistical design in the leaching study of low-grade manganese ore using aqueous sulfur dioxide. Sulfur dioxide leaching studies on low-grade manganese ore were carried out at room temperature and atmospheric pressure. The experiments carried out using −150 μm particles aimed at determining….
Manganese leaching efficiency from WK ore is always higher than that from TG ore under the same leaching conditions. The mineral contents of the ores significantly affected the …
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.
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 conditions are, …
The pre-reduction of manganese ore using elemental sulfur under an inert atmosphere at temperatures above 600 °C is required for maximum MnO formation. …
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 …
Selective-reductive leaching of Mn from low-grade manganese ore using tannic acid as a reductant in sulfuric acid media was demonstrated. The results showed …
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 …
XPS diagram of manganese ore leaching slag; (a) the full spectrum of leaching slag, (b) Mn spectrum. Scanning electron microscopy (SEM) was performed on the leaching residue to analyze the microstructure of the manganese ore and the leaching residue. The result is shown in Fig. 6. In the scanning electron microscope image of the …
The leaching behavior of manganese from ferruginous manganese ore in sulphuric acid solution using sodium dithionite as a reducing agent was investigated. The optimum sulphuric acid concentration, leaching time, temperature, pulp density and agitation speed for leaching of manganese was determined. Complete manganese …
Key words: manganeseâˆ'zinc compound ore; hydrogen peroxide; sucrose; comprehensive utilization; manganese; zinc; leaching 1 Introduction With the continual …
A reductive leaching process for a low-grade manganese ore has been successfully demonstrated using a mixture of sulfuric acid and cane molasses as …
Current study investigates the SO 2 leaching of low-grade ferruginous manganese ores to selectively recover manganese as MnSO 4 and subsequently produce battery grade electrolytic manganese dioxide (EMD) from the purified MnSO 4.The effect of leaching process parameters such as leaching duration, temperature, and the SO 2 …
Aqueous SO 2 leaching studies of Nishikhal manganese ore containing 32.5% Mn and 16.5% Fe were carried out at atmospheric pressure and room temperature using H 2 SO 3.The variables considered were SO 2 concentration, solid-to-liquid ratio, sulphuric acid concentration and duration of leaching. Regression equations for …
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, …
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, H 2 SO 4 concentration, reaction temperature, and time on Mn leaching from the complex LGMO were studied. A leaching efficiency of ∼98% was achieved at a …
A 97.43% leaching ratio of manganese was obtained from the roasted ore, which was leached by a 1.5 mol/L concentration of sulfuric acid at a 50°C leaching temperature, 50 rpm stirring speed and a 10:1 liquid-to-solid ratio for 5 min. Compared to the conventional reductive roasting-acid methods, the proposed technique was performed at …
The leaching of manganese from manganiferous ore using whey or lactose in sulphuric acid solutions at 70 °C was investigated ( Veglio et al., 2000 ). Two experiments with different pulp densities (10% and 30% w / v) were studied, each including a variation …
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 …
Gravity Experiments of Manganese Ore Consequently, the acid leaching reduction method The test was performed by shaking table the possesses the advantages of energy conservation and sample preparation for the primary ore sample size of the one-step leaching process [12]. The research is -2 mm, -1 mm, -0.6 mm, -0.3 mm, and -0.1 mm, …
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 is …
Manganese ore-based wet flue gas desulfurization (MFGD) is a resourcing technology capable of simultaneously reutilization flue gas sulfur dioxide (SO2) and green, low-carbon manganese leaching.
Manganese oxide ore was used as the raw material in the leaching experiments. The roasted products were leached by 1 M H 2 SO 4 as well as deionized water. The leaching conditions were fixed according …
Manganese ore was also analyzed by thermal analysis to observe their thermal decomposition character. In this study, sulphuric acid (H 2 SO 4, 6 M) was deployed as leaching agent. The leaching process was performed at 90 °C for two hours with the addition of NH 4 OH to control pH. Recovery percentage of leaching process yielded of …
During leaching effects of pulp density, amount of acid, temperature, particle size of ore and reductant to ore ratio were studied. Almost total manganese extraction could be achieved under the following conditions: leaching time 8h, H2SO4 5% (v/v), pulp density 10% (w/v), temperature 950C and dried leaves to ore ratio 0.5.
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 …
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 …
manganese ore from the northwestern Cape as the sole source of manganese. However, the high iron content of these ores (10 to 12 per cent) meant that new tech- ... leaching of the reduced ore in spent electrolyte by the reverse-leaching technique to minimize the dissolution of iron, (c) purification of the leach liquor to remove all the ...
Meanwhile, a comprehensible understanding of the leaching kinetics is necessary for an efficient design of leaching manganese ore [17]. Previous research on the leaching efficiency of MnO 2 with Fe 2+ in H 2 SO 4 solution is controlled by chemical reaction with the apparent activation energy (E a) of 28 kJ·mol −1 [18].
Manganese extraction was 90.6% under the optimal conditions: roasting at 500 °C for 60 min with 104 μm of average ore size and 1.0% SO 2 (SO 2 / (SO 2 + N 2) gas flow, followed by leaching at 50 °C for 15 min with stirring rate of 200 rpm and liquid-to-solid ratio of 5. Only 3.8% of iron was leached.
