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Abstract. 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 ...
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 temperature of …
A leaching process was developed to extract manganese and metal values from manganese Alloga concentrate. The preferential leaching process was achieved through reductive leaching in dilute sulfuric acid medium with malonic acid as the reducing agent. Leaching parameters were optimized as 1.0 M H. 2. SO. 4
Additionally, the reported studies on the sulfuric acid leaching with MnO 2 as oxidant only dealt with samples containing low concentration of selenides/tellurides, and the leaching behavior of manganese from the oxidant is often ignored (Hait et al., 2002, Hait et al., 2004; Xiao et al., 2018, Xiao et al., 2019).
In this study, pyrolusite ore was leached with sulfuric acid using either sawdust or lactose as a reducing agent to convert the insoluble manganese dioxide (MnO 2 ) to soluble manganese oxide (MnO). Leaching of pyrolusite ore using sulfuric acid medium and in presence of sawdust as a reductant to produce manganese sulfate could be described by ...
May 19, 2016· The optimum leaching conditions to achieve almost complete leaching efficiency of Mn with Fe dissolution not exceeding 13% involved 0.5 M sulfuric acid and 0.25 M oxalic acid in a solid/liquid ratio of 1/15 at 85°C for 105 min using an ore size of -150 μm. The leaching behavior of the associated interesting metal values (Al, Cu and Zn) has ...
In this article, the sulfuric acid leaching of industrially produced waste LIBs scraps with 23.6% cobalt (Co), 3.6% lithium (Li) and 6.2% copper (Cu) was investigated. The industrially produced LIBs scraps were shown to provide higher Li and Co leaching extractions compared to dissolution of corresponding amount of pure LiCoO 2 .
W) and sulfuric acid concentration (C H) on the leaching efficiency of manganese were studied. The leaching efficiency of manganese based on the shrinking core model was found to be controlled by diffusion through the ash/inert layer composed of the associated minerals. The apparent activation energy is 15.18 kJ mol 1. The experimental ...
Mar 18, 2015· 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 …
Except in special circumstances, sulfuric acid is the leachant used; it is supplied in amounts sufficient to obtain a final leach liquor at about pH 1.5. Sulfuric acid leaching circuits commonly employ either manganese dioxide or chlorate ion to oxidize the tetravalent uranium ion (U 4+) to …
May 01, 2001· The sulfuric acid leaching of manganese nodules using hydrogen peroxide (H20z) as a reducing agent, developed by the United States Bureau of Mines (Allen et al., 1991), seems to be a promising process route. The leaching rate is very fast and metal extraction generally completes in about 5 minutes. The oxidation products of the hydrogen ...
Mar 17, 2017· In this investigation, manganese has been produced from medium grade manganese ore from Karangnunggal mine (West Java, Indonesia). The …
10%· Jan 03, 2020· Sulfuric acid (AR) with a concentration of 96% w/w and a density of 1.84 g/mL was used as the leaching agent in all experiments.Distilled water was used throughout the experiments for the solution preparation. The particle sizes of manganese-rich slag and pyrite both pass through sieve: 75–80 μm.
The leaching method again of the waste residue that the sulfuric acid leaching manganese carbonate ore that the present invention introduces produces, be by sulfuric acid leaching manganese carbonate ore produce waste residue be milled down to particle diameter≤180 order after and≤1.5mm cavings add in the lump withstand voltage, resistance to sulfuric acid and nitric acid corrosion reactor ...
A kinetic study of the leaching of manganese mining residue by sulfuric acid and potassium oxalate has been investigated. The effects of the reaction agitation speed, manganese ore particle size, acid concentration, oxalate concentration and temperature on manganese rate dissolved. The leaching rates are significantly influenced by the
Jul 01, 2016· 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 H) on the leaching efficiency of manganese were …
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 ...
Methods of recovering manganese in the form of manganese carbonate from ores containing manganese and iron while also removing substantially all of the iron contained in the sulfurous acid leach solution are disclosed.
sulfuric acid solution. The effect of parameters on the leaching efficiency of manganese was the primary focus. Exper-imental results indicate that manganese leaching efficiency of 97.57% was achieved under the optimal conditions: weight ratio of black locust to manganese dioxide ore (WT) of 4:10, ore particle size of 63 μm, 1.7 mol·L-1 H 2 SO4
Abstract: 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(SiO 4), calcite (CaCO 3), and -quartz (SiO 2). X-ray
Aug 30, 2013· Study of the Leaching of a Manganese Mining Residue by Na 2 SO 3 in Sulfuric Acid Solution - written by A. Alaoui, K. El Kacemi, S. Kitane A published on 2013/08/30 download full article with reference data and citations
Nov 16, 2020· Leaching of manganese was done with sulphuric acid. The effects of particle size, stirring speed, contact time, acid concentration, temperature and dosage of reductant were studied. Based on the experimental results, the recovery of manganese increased with decreasing particle size.
Nov 21, 2018· The kinetics of reductive leaching of manganese from iron-rich manganese dioxide ore (IRMDO) using bagasse pith as a reductant in the presence of sulfuric acid was investigated. The effects of reductant type, stirring speed, ore particle size, leaching temperature, sulfuric acid concentration and weight rati
This work presents a party results of a study on a method of tailings management manganese mine in operation, the deposit IMINI is the largest manganese deposit in Morocco. These residues from the treatment plant pyrolusite, have a relatively fine particle size (710 microns) and Mn content ranging from 31.6% to 39.2%. All these residues are removed and deposited near the mine.
May 28, 2017· Leach liquors resulting from an oxidative leach of copper matte with sulfuric acid and manganese dioxide contained (in grams per liter) 0.5 cobalt, 1.2 nickel, 33 copper, 35 manganese, 2.3 iron, and 0.29 arsenic. The nickel matte leach liquors contained (in grams per liter) 2.5 cobalt, 20 nickel, 28 copper, 50 manganese, 1.7 iron, and 7 arsenic.
Leaching tests with sulfuric acid of the powdered samples were conducted to define the efficiency of acid manganese extraction. The weighed amount of active paste was leached in sulfuric acid solution under agitation for 2 hours at 60 ºC. Different conditions of solid/liquid ratio (weight sample/ leaching solution) and sulfuric acid ...
Abstract Studies have been carried out to determine maximum extraction efficiency of Co, Ni, Cu and Mn from manganese deep ocean nodules in FeSO4–H2SO4–H2O solutions and to maximise Co, Ni, Cu and Mn concentrations in the resulting leach liquors. The leaching parameters such as sulphuric acid concentration, liquid-to-solid ratio, temperature, time and grain size of nodules were varied to ...
Jan 03, 2020· Sulfuric acid (AR) with a concentration of 96% w/w and a density of 1.84 g/mL was used as the leaching agent in all experiments.Distilled water was used throughout the experiments for the solution preparation. The particle sizes of manganese-rich …
Apr 23, 2019· The manganese recoveries were when tannic acid and oxalic acid used as reducing agent, using 1 M of sulfuric acid and 5% of pulp density at 30°C of leaching temperature, 150 rpm of shaker speed, atmospheric pressure, and 8 hours of leaching period.
Sulfuric acid (American spelling) or sulphuric acid (Commonwealth spelling), also known as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with the molecular formula H 2 SO 4.It is a colorless, odorless and viscous liquid that is miscible with water.. Pure sulfuric acid does not exist naturally on Earth due to its strong affinity to water vapor; for this ...