Semantic Scholar extracted view of "Hydrometallurgical recovery of manganese, gold and silver from refractory Au-Ag ore by two-stage reductive acid and cyanidation leaching" by Zhang Kuifang et al.
Studies on the distribution of manganese-bearing rocks in the Birimian and their relationship with gold mineralization are still in progress. Both manganese and gold occur as stratabound lenses within volcano-sedimentary sequence. Evidence of pre- and post-tectonic mineralizations are present.
Request PDF | Enhancing Manganese Recovery from Low-Grade Ores by Using Mixed Culture of Indigenously Isolated Bacterial Strains | Conventional leaching methods for Manganese (Mn) recovery require ...
Emphasis was placed on alteration of iron and manganese minerals by electrooxidation and sulfurous acid leaching and on determination of the effect on silver extraction. The electrooxidation technique was developed by the Bureau of Mines for treatment of carbonaceous gold ore, cinnabar ore, and molybdenum-rhenium ore and …
Gold recovery from refractory gold ores with controlled roasting remained well below 80%. Na 2 SO 4 was added in an O 2-enriched single stage roasting of a refractory gold ore to improve its gold recovery.
Our diverse range of products include manganese ore, iron ore, ferromanganese, silicomanganese, coke and power. These products are extracted & manufactured by adhering to the best-in-class ...
An additional 42% of unleached gold could improve overall gold recovery from around 87% to approximately 91%. Assuming concentrate generation of 900 st/day, the value of the tellurium and gold ...
Stainless steel crude alloy recovery from direct smelting of low-grade chromite, nickel laterite and manganese ores was investigated.
A recovery of 98% for manganese and 85% for silver was attained for an ore analyzing 12.2% Mn and 1850 g/t Ag under the conditions of 0.8 mol/L H2O2, 0.8 mol/L H2SO4, 25 °C, 2 h of leaching time.
Recovery of manganese from low-grade pyrolusite was investigated by reductive leaching method using lignin as a reductant in the sulfuric acid medium.…
We designed and synthesized a novel linoleate hydroxamic acid (LHA) which demonstrated high selectivity and strong collecting capacity for the beneficiation of manganese ore by selective flotation. The performance of this LHA and oleic acid (OA) used for anionic froth flotation was compared, and the critical factors of rhodochrosite …
The leaching of gold, silver and their alloys in alkaline glycine–peroxide solutions and their adsorption on carbon. Hydrometallurgy 152, 193–203. Oraby, E.A., Eksteen, J.J., Tanda, B.C., 2017. Gold and copper leaching from gold-copper ores and concentrates using a synergistic lixiviant mixture of glycine and cyanide.
Bioleaching is a simple and effective technology for metal extraction from low-grade ores and mineral concentrates. Metal recovery from sulfide minerals is based on the activity of chemolithotrophic bacteria, mainly Thiobacillus ferrooxidans and T. thiooxidans, which convert insoluble metal sulfides into soluble metal sulfates. Non-sulfide ores ...
With the growth of the new energy industry, the requirements for manganese have increased significantly. In this paper, the method of manganese extraction from pyrolusite using ammonium sulfate …
A novel process was developed to markedly increase silver cyanidation performance from a refractory gold–silver ore in Beiya, Yunnan province, China. Before cyanidation, the process employs a pretreatment step that aims at liberating the silver grains by destroying the crystal lattices of manganese minerals.
Co-recovery of manganese from pyrolusite and gold from carbonaceous gold ore using fluidized roasting coupling technology
Semantic Scholar extracted view of "Dual lixiviant leaching process for extraction and recovery of gold from ores at room temperature" by Jiantao Zhang et al.
Gold is often found associated with the mineral quartz. It is sometimes associated with other minerals as well, including iron and manganese oxides, calcite, pyrite and other sulfides as well. It is not uncommon for prospectors, especially those who operate metal detectors, to find a rich gold bearing specimens of ore.
An additional 42% of unleached gold could improve overall gold recovery from around 87% to approximately 91%. Assuming concentrate generation of 900 st/day, the value of the tellurium and …
This review comprises of information about the recovery of manganese through leaching and carbothermic reduction routes. In industrial processes, various critical parameters such as ore size, temperature, pressure, gas atmosphere and ore composition etc. affect the reduction or recovery of Mn from ores. Authors have tried to bring those …
The ongoing depletion of gold and silver-containing ore deposits demands a shift towards the processing of more complex sources. Leaching of gold or s…
A novel process for the separation and recovery of value-added metals from manganese–silver ores by EDTA/EDTA–2Na and thiosulfate. Hydrometallurgy 2018, 178, 256–263.
Increasing demand for manganese and rapid depletion of high-grade manganese ores grow attention to other resources. However, environmental impacts and techno-economic issues are the main challenges regarding manganese extraction from low-grade ores. This study investigated the environmental impacts of manganese recovery from low-grade …
Gold recovery from refractory gold ores with controlled roasting remained well below 80%. Na 2 SO 4 was added in an O 2 -enriched single stage roasting of a refractory gold ore to improve its gold recovery.
A new study shows the recovery of gold from oxidized ore in glycine alkaline solution is 85.1% under the condition of strong oxidation of potassium permanganate [9].
Recent research on the comprehensive recovery and utilization of carbonaceous gold ores has found that the pretreatment of carbonaceous gold ores by reduction roasting (without oxygen atmosphere) cannot only recover gold but can also utilize carbonaceous matter and reduce the cost of waste gas treatment.
Precious metals such as gold and silver are recovered from difficult-to-treat ores, particularly those containing manganese, by lixiviating using an ammonium thiosulfate leach solution containing copper, sufficient ammonia to maintain a pH of at least 7.5, and at least 0.05% sulfite ion.
The present review summarizes the process developed for extraction and recovery of manganese from ores using different kinds of reducing agents. The parameters affecting the leaching of manganese and …
