mobile crusher jaw for inch rock

mobile crusher jaw for inch rock

Leaching of manganese from low-grade manganese

2001-12-1  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 24 full factorial design, and regression equations for extraction of manganese, iron and aluminum were ...

More

Reductive leaching of manganese from low-grade

2008-8-1  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 as the H 2 SO 4 concentration and reaction time increase. Metal extraction from the manganese ore strongly depends on the reaction temperature.

More

Reductive leaching of manganese from low grade

2006-11-1  Manganese leaching from a low-grade ore (8.52% Mn) from Sinai was investigated by using hydrochloric acid in the presence and absence of hydrogen peroxide as a reducing agent. Sample characterization by XRD showed the presence of a variety of manganese minerals mainly cryptomelane, chalcophanite, pyrolusite, and crednerite.

More

Reductive leaching of manganese from low-grade

2010-1-1  Recently, Zhu and co-workers found that low-grade manganese dioxide ores can be reduced by biomass cornstalk roasting at temperature of 500 °C and the manganese can be leached from the roasted product using sulfuric acid as the leaching agent (Cheng et al., 2009).

More

Enhanced leaching of manganese from low-grade

2021-3-15  In this study, electric field and ball milling were used to leach Mn 2+ from low-grade pyrolusite (LGP). The effects of current density, reaction time, reaction temperature, ball-to-powder weight ratio, and ball milling time on the leaching efficiency of Mn 2+ from LGP as well as the leaching mechanism were systematically studied. The results showed that the combined use of electric field

More

Leaching of manganese from low-grade manganese

Abstract 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 aluminum were determined from the data.

More

Selective-Reductive Leaching of Manganese from Low

2019-7-31  Previous reports in low-grade manganese ore leaching are dominated by reductive leaching processes, which convert manganese dioxide (MnO 2) in low-grade ore to soluble species Mn 2+ in acidic condition based on reaction .

More

Reductive Acid Leaching of Low Grade Manganese Ores

2013-12-24  studies have been carried out for leaching of low grade manganese ore using sulphuric acid and oxalic acid [6,7], nitric acid [8], hydrochloric acid and citric acid [9] as

More

Enhanced leaching of manganese from low-grade

In this study, electric field and ball milling were used to leach Mn 2+ from low-grade pyrolusite (LGP). The effects of current density, reaction time, reaction temperature, ball-to-powder weight ratio, and ball milling time on the leaching efficiency of Mn 2+ from LGP as well as the leaching mechanism were systematically studied.

More

STATISTICAL STUDY ON LEACHING OF MANGANESE

2015-2-3  Leaching studies of low-grade Egyptian manganese ore containing 25.3% MnO 2, and 52.06 % Fe 2 O 3 using glucose as reductant in sulfuric acid medium. The experiments were designed according to 25 full factorial design, and regression equation for the extraction of Mn was determined as a function of H 2 SO 4 concentration (C), H 2 SO 4

More

Selective-Reductive Leaching of Manganese from Low

2019-7-31  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 characterization, and batch leaching studies at room temperature. The pH change in the liquid phase before and after leaching revealed that selectivity of manganese over iron was due to the hydrolysis of iron. The acidity in the

More

STATISTICAL STUDY ON LEACHING OF MANGANESE

2015-2-3  Leaching studies of low-grade Egyptian manganese ore containing 25.3% MnO 2, and 52.06 % Fe 2 O 3 using glucose as reductant in sulfuric acid medium. The experiments were designed according to 25 full factorial design, and regression equation for the extraction of Mn was determined as a function of H 2 SO 4 concentration (C), H 2 SO 4

More

Enhanced leaching of manganese from low-grade

In this study, electric field and ball milling were used to leach Mn 2+ from low-grade pyrolusite (LGP). The effects of current density, reaction time, reaction temperature, ball-to-powder weight ratio, and ball milling time on the leaching efficiency of Mn 2+ from LGP as well as the leaching mechanism were systematically studied. The results showed that the combined use of electric field and ...

More

Reductive Acid Leaching of Low Grade Manganese Ores

2013-12-24  Manganese recoveries from low-grade ores using organic acids as reducing agents were investigated in the present work. The acid leaching potential of both oxalic acid and citric acid were estimated. Manganese leaching amount were meas-

More

Selective-Reductive Leaching of Manganese from Low

Selective-Reductive Leaching of Manganese from Low-Grade Manganese Ore Using Tannic Acid as Reductant Erik Prasetyo1 Eti Purwaningsih1 Widi Astuti1 Received: 9

More

Reductive leaching of manganese from low-grade

2016-2-27  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 leaching ...

More

Reductive leaching of manganese from low-grade

Abstract Extraction of manganese from manganese dioxide ores was investigated using corncob as a reducing agent in dilute sulfuric acid medium. The effects of corncob amount, concentration of sulfuric acid, leaching temperature, reaction time and ore particle size were discussed. The leaching efficiency of manganese reached 92.8% while iron dissolved was 24.6% under the optimal condition which ...

More

Reductive Acid Leaching of Low Grade Manganese Ores

2014-6-19  Manganese recoveries from low-grade ores using organic acids as reducing agents were investigated in the present work. The acid leaching potential of both oxalic acid and citric acid were estimated. Manganese leaching amount were measured by using standard manganese curve and estimated by titration method. Effects of various acid concentrations on leaching efficiency were studied.

More

Hydrometallurgical leaching and kinetic modeling of

2020-1-17  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 leaching time of 2 h, banana peel amount of 4 g, leaching

More

Hydrometallurgical leaching and kinetic modeling of

2021-2-13  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 leaching time of 2 h, banana peel amount of 4 g, leaching

More

Leaching of manganese from low-grade manganese

Abstract 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 aluminum were determined from the data.

More

STATISTICAL STUDY ON LEACHING OF MANGANESE

2015-2-3  Leaching studies of low-grade Egyptian manganese ore containing 25.3% MnO 2, and 52.06 % Fe 2 O 3 using glucose as reductant in sulfuric acid medium. The experiments were designed according to 25 full factorial design, and regression equation for the extraction of Mn was determined as a function of H 2 SO 4 concentration (C), H 2 SO 4

More

Reductive leaching of manganese from low-grade

2016-2-27  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 leaching ...

More

Reductive leaching of manganese from low-grade

Abstract Extraction of manganese from manganese dioxide ores was investigated using corncob as a reducing agent in dilute sulfuric acid medium. The effects of corncob amount, concentration of sulfuric acid, leaching temperature, reaction time and ore particle size were discussed. The leaching efficiency of manganese reached 92.8% while iron dissolved was 24.6% under the optimal condition which ...

More

Kinetic Study of the Leaching of Low-Grade Manganese

2017-5-24  Abstract: 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.

More

Kinetic Study of the Leaching of Low-Grade

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 efficiency is strongly ...

More

Reductive Acid Leaching of Low Grade Manganese Ores

Manganese recoveries from low-grade ores using organic acids as reducing agents were investigated in the present work. The acid leaching potential of both oxalic acid and citric acid were estimated. Manganese leaching amount were measured by using standard manganese curve and estimated by titration method. Effects of various acid concentrations on leaching efficiency were studied.

More

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

Reductive leaching of manganese from low-grade pyrolusite ore in sulfuric acid using pyrolysis-pretreated sawdust as a reductant Ya-li Feng Shi-yuan Zhang Hao-ran Li 【摘要】: Manganese(Mn) leaching and recovery from low-grade pyrolusite ore were studied using sulfuric acid(H_2SO_4) as a leachant and pyrolysis-pretreated sawdust as a reductant.

More

A Comparative Study on Acid Leaching of Low Grade ...

A Comparative Study on Acid Leaching of Low Grade Manganese Ore Using Some Industrial Wastes as Reductants Adel A Ismail1*, Essam A. Ali2, Ibrahim, A. Ibrahim1 and Mohamed S Ahmed2

More

Manganese Extraction from Low-Grade Pyrolusite by

2018-7-11  A new method was studied for extracting manganese from low-grade pyrolusite with H2SO4 roasting and subsequent water leaching. The mechanism of roasting and optimal conditions for roasting, including the amounts of H2SO4 and H2O addition and the roasting temperature and time, were discussed. The results indicated that the pyrolusite roasting process in the temperature range of

More

Copyright © 2021.Company name All rights reserved. Sitemap