Reducing agents in the leaching of manganese ores: A …
Zhang et al. [5] used chemical pure sulfur as a reducing agent to treat low-grade manganese oxide ore through reduction roasting and sulfuric acid leaching. ...
Reductive leaching of manganese oxide ores using waste …
Manganese oxide ores from Gabon and Xiangxi were leached with waste tea as reductant in dilute sulfuric acid solution. The effects of waste tea dosage, concentration of sulfuric acid, liquid-to-solid ratio, leaching temperature and reaction time on leaching process were explored.
Reducing agents in the leaching of manganese ores: A comprehensive
In this research work, the reductive leaching of pyrolusite in a sulfuric acid medium with the aid of orange peel as a reductant was investigated.
Micellar mediated selective leaching of manganese nodule …
The factors that affected the sulfuric acid leaching of the manganese nodules in the presence of various surfactants were investigated. The effect of anionic (SDS-Sodium Dodecyl Sulphate), cationic (CTAB-Cetyl Trimethyl Ammonium Bromide) and nonionic (Triton-X 100) surfactant on the various metals extraction with respect to …
Leaching Kinetics of Manganese Oxides Obtained from …
The leaching of manganese oxides was carried out in aqueous sulfuric acid solutions containing molasses. Because the leaching extent of manganese oxides in sulfuric acid solutions was limited, molasses were used as the reductive agent to increase the leaching yield.
(PDF) Preparation of manganese sulfate from low-grade manganese …
Therefore, from an economic perspective, the sulfuric acid leaching of low-grade manganese ores for the production of manganese sulfate is an important process [8]. Recently, numerous studies on the leaching of low-grade manganese oxide ores for preparing pure manganese sulfate have been carried out using various reducing …
Manganese extraction by sulfur-based reduction …
Abstract In recent years, the comprehensive utilization of low-grade manganese oxide ores has received much attention due to the shortage of high-grade …
Augmenting metal leaching from copper anode slime by sulfuric acid …
Augmenting metal leaching from copper anode slime by sulfuric acid in the presence of manganese(IV) oxide and graphite. Author links open overlay panel Kurniawan Kurniawan a b, Jae-chun Lee a b, ... the reported studies on the sulfuric acid leaching with MnO 2 as oxidant only dealt with samples containing low concentration of …
Reducing agents in the leaching of manganese ores: A …
The reducing agents used for leaching are either pure inorganic or organic chemicals or sometimes new kinds of reducing agents such as agricultural and biomass wastes. The present review summarizes the process developed for extraction and …
Reductive leaching of manganese from low-grade manganese …
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 …
Reaction between manganese (IV) oxide and sulfuric acid
We get the oxygen moiety of the manganese dioxide suddenly oxidized to gaseous oxygen, while the manganese gets reduced from +4 to +2. The sulfuric acid is apparently unperturbed: its proton $ce{H+}$ and its $ce{SO4^{2-}}$ parts remain the same in terms of their oxidation states. What role does the sulfuric acid play here at all?
Kinetics of reduction leaching of manganese dioxide ore with Phytolacca
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 …
Banana peel reductant for leaching medium grade manganese …
In this investigation, manganese has been produced from medium grade manganese ore from Karangnunggal mine (West Java, Indonesia). The effects of weighed amount of banana peels on the structural and leaching properties have been studied.
Sulfuric Acid Leaching of Smelter Matte
The sulfuric acid-manganese dioxide leaching of lead smelter mattes and subsequent processing to recover the contained cobalt, nickel, and copper are included in the proposed flow diagram shown in figure 9. The matte leaching produces a cobalt, nickel, and copper containing liquor that is contaminated with arsenic and iron. ...
(PDF) Kinetics of reduction leaching of manganese dioxide …
The leaching kinetics of reductive leaching of manganese from manganese dioxide ores (MDO) in dilute sulfuric acid in the presence of Phytolacca americana powders (PAP) was investigated.
Preparation of manganese sulfate from low-grade …
We observed that sulfuric acid used as a leaching agent provides a similar leach- ing efficiency of manganese and superior selectivity against calcium compared to hydrochloric acid. The optimal leaching conditions in sul-
Recovery of pure MnSO4∙H2O by reductive leaching of manganese …
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.
Micellar mediated selective leaching of manganese nodule …
The present study evaluates the possibility of selective leaching of manganese from complex, manganese and iron oxy-hydroxide based sea bed nodule utilising micelles in high temperature acid dissolution process.Application of surfactants during acid leaching of manganese nodules are described based on results from …
Selective-Reductive Leaching of Manganese from Low-Grade …
Selective-reductive leaching of Mn from low-grade manganese ore using tannic acid as a reductant in sulfuric acid media was demonstrated. The results …
Recovery of pure MnSO4∙H2O by reductive leaching of manganese …
In the present work, a reductive leaching and recovery of manganese from pyrolusite manganese ore obtained from Morgan Chemical Company, Egypt in sulfuric acid solution in the presence of hydrogen peroxide as reducing agent was investigated.
Selective leaching of lithium from spent lithium-ion
Traditional hydrometallurgical methods for recovering spent lithium-ion batteries (LIBs) involve acid leaching to simultaneously extract all valuable metals into the leachate. These methods usually are followed by a series of separation steps such as precipitation, extraction, and stripping to separate the individual valuable metals. In this …
Leaching process and kinetics of manganese in low-grade
Manganese was extracted from leaching low-grade manganese ore in sulfuric acid medium. The effects of granule diameter, leaching time, liquid/solid ratio …
Preparation of manganese sulfate from low-grade manganese …
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 agents, sulfuric acid concentration, reaction temperature, and agitation rate on the leaching efficiency of manganese were …
Reductive leaching of manganese oxide ores using waste …
Manganese oxide ores from Gabon and Xiangxi were leached with waste tea as reductant in dilute sulfuric acid solution. The effects of waste tea dosage, concentration of sulfuric acid, liquid-to ...
Hydrometallurgical Process and Kinetics of Leaching …
The extraction of manganese from a semi-oxidized manganese ore was investigated with sucrose as the reducing agent in dilute sulfuric acid medium. The kinetics of leaching …
Reductive leaching of manganese from low-grade …
Manganese extraction from a low-grade ore was investigated using cane molasses as a reducing agent in dilute sulfuric acid medium. The effects of …
Effect of sulfuric acid concentration on the leaching efficiency.
In order to utilize low-grade manganese ore resources effectively, a hydrometallurgical process was developed for manganese extraction in dilute sulfuric acid medium, and …
Uranium processing
Sulfuric acid leaching circuits commonly employ either manganese dioxide or chlorate ion to oxidize the tetravalent uranium ion (U 4+) to the hexavalent uranyl ion (UO 2 2+). Typically, about 5 kilograms (11 pounds) of manganese dioxide or 1.5 kilograms of sodium chlorate per ton suffice to oxidize tetravalent uranium.
Extraction of Manganese by Leaching
The first phase of this study was conducted to examine the feasibility of extracting manganese from Georgia umber ore by means of a three-stage continuous …
(PDF) Simultaneous leaching of zinc sulphide concentrate and manganese …
The kinetics of simultaneous leaching of zinc sulphide concentrate and manganese ore in sulphuric acid has been studied in the temperature range of343 to 373 K.