Reductive leaching of manganese oxide ore in aqueous,
Jan 01, 1999· 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 extraction could be achieved during autoclave digestion at,Leaching of manganese ore with aqueous sulphur,case of sea-bed nodules. The reaction between metal oxide and sulphur dioxide has been studied in detail by Miller and Wan (1983), Khalafalla and Pohlman (1981), and Raisoni and Dixit (1987). It has been observed that (i) the sulphurous acid leachingEffect of Manganese on Silver Leaching - 911 Metallurgist,Sep 07, 2016· (a) The silver is insoluble in nitric acid, in connection with which it is to be noted that MnO2 is also more or less insoluble in nitric acid. (b) If the oxides of manganese be removed by some solvent, such as hydrochloric or sulphurous acid, the silverA method of producing manganese dioxide,The invention relates to a method of underground leaching manganese ore, mainly oxide-carbonate, with the use of sulphurous acid, implemented through a system of injection and odajnyk wells. Combined waste processing methods of manganese ore // 2095453.leaching manganese with sulphurous acid,reduction leaching of low-grade manganese oxide ores [3,4]. Generally speaking, such ores can be treated either by reduction roasting followed by acid leaching or directly by reductive acid leaching using different reducing agents [5]. The reductants used for reduction roasting−acid leaching include coal, graphite or sulfur [6,7], pyrite [8],US1835474A - Leaching ore - Google Patents,US1835474A US434467A US43446730A US1835474A US 1835474 A US1835474 A US 1835474A US 434467 A US434467 A US 434467A US 43446730 A US43446730 A US 43446730A US 1835474 A US1835474 A US 1835474A Authority US United States Prior art keywords manganese solution chloride ore carbonate Prior art date 1930-03-08 Legal status (The legal status is an assumption and is not a
Process for extracting a manganese concentrate from,
A process for extracting a manganese concentrate, copper, nickel and cobalt from maritime manganese ore, containing said elements in admixture with iron, said process comprising the steps of finely grinding said ore, leaching said finely ground ore, in acidic aqueous suspension, with sulfur dioxide or sulfurous acid at a temperature of 90°-100,Extraction of metals from manganese nodules of the,May 01, 1988· A low grade manganese nodule sample from the central Indian Ocean basin was leached in aqueous SO 2 solution whereby the tetravalent oxide of manganese was rapidly reduced and extracted along with cobalt, nickel, zinc, iron and copper. The extraction of all these metal ions and particularly of iron and copper depended upon the actual amount of SO 2 present (in moles) per unitThe method of extraction of manganese from the mn,,The invention relates to a method of underground leaching manganese ore, mainly oxide-carbonate, with the use of sulphurous acid, implemented through a system of injection and odajnyk wells. Combined waste processing methods of manganese ore // 2095453.Oxidation kinetics of dithionate compound in the leaching,,Manganese dithionate (MnS2O6), formed in the leaching process of pyrolusite slurry with SO2, is a concern because of its ability to decrease the purity of MnSO4 (industrial raw material).,,
