Establishing thE ProcEss MinEralogy of gold orEs
Gold in non-refractory sulfide ores can be recovered by whole-ore cyanidation, or some combination of flotation and cyanidation. Acceptable extraction of refractory gold can only be achieved by employing a pre-oxidation process prior to cyanide leaching. Antimony, bismuth sulfide and telluride gold ores: Antimony, bismuth sulfide andWeb
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Biooxidation-thiosulfate leaching of refractory gold concentrate
A process of biooxidation followed by thiosulfate leaching of gold from refractory gold concentrate was investigated. Mineralogical studies on the concentrate showed that very fine gold grains (<10 µm) were encapsulated in pyrite and arsenopyrite, while the proportion of monomer gold was only 21%. The gold-bearing sample was …Web
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Minerals | Free Full-Text | Automated Mineralogy and Diagnostic …
Obtaining detailed and precise information from a classified refractory gold ore has been a long-standing challenge in mineral processing and process mineralogy. Although the concept of diagnostic leaching has been extensively addressed in the literature, very little information is available linking this approach with current advanced …Web
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A review of the technologies for antimony recovery from refractory …
DOI: 10.1080/08827508.2022.2132946 Corpus ID: 252894617; A review of the technologies for antimony recovery from refractory ores and metallurgical residues @article{Ling2022ARO, title={A review of the technologies for antimony recovery from refractory ores and metallurgical residues}, author={Hongbin Ling and Annelies Malfliet …Web
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Process mineralogy characteristics of acid leaching residue
To provide a theoretical basis for a suitable process to extract gold from refractory gold concentrates, process mineralogy on the acid leaching residue of gold calcine was studied by chemical composition, X-ray diffraction, scanning electron microscopy-energy spectrum, and mineral dissociation analysis. The results showed that …Web
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Process Flow-Sheet for Gold and Antimony Recovery from Stibnite
Main parameters studied were: Na2S concentration, NaOH concentration, pulp density and temperature.After leaching, antimony has been recovered by …Web
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Improved gold and silver extraction from a refractory antimony ore …
The pretreatment of an antimonial refractory gold and silver ore was investigated using alkaline sulphide leaching.The ore assayed 20 g/t Au and 220 g/t Ag and contained predominantly quartz/clay and barite, and to a lesser extent, sulphides such as pyrite, stibnite, sphalerite, zinkenite (Pb 9 Sb 22 S 42) and andorite (Sb 3 PbAgS 6).The …Web
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Comprehensive Recovery of Valuable Metals From Spent
A large amount of spent magnesia–chrome refractories is produced every year from nonferrous metallurgy industry in China. These spent refractories contain not only Mg and Cr but also a large amount of Ag, Pb, Bi, Cu, Sb and other valuable metals. This study proposes a high-efficiency, low-cost and recyclable technology for the treatment of …Web
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Mineralogy and Pretreatment of a Refractory Gold …
The gravity–flotation combined beneficiation pretreatment process provided a feasible method for the refractory gold ore and ensured the effective recovery of gold. ... Tian, Q. Mineralogical characterization …Web
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Refractory gold reserves: Challenges and opportunities for a key …
Gold miners are facing a reserves crisis, and what is left in the ground is becoming more and more challenging to process.Refractory gold reserves, which require more sophisticated treatment methods in order to achieve oxide-ore recovery rates, correspond to 24 percent of current gold reserves and 22 percent of gold resources …Web
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A review of the technologies for antimony recovery from refractory …
Many countries will have to rely on recovering antimony from refractory ores and metallurgical residues. For the purpose of efficient and selective antimony …Web
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Selective alkaline leaching of antimony from Low-grade refractory …
In this study, on the basis of the occurrences analysis of gold and antimony in Sb-bearing refractory gold ore, the process parameters for extracting antimony by …Web
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Selective removal of antimony from refractory gold ores by ultrasound
In this study, ultrasound was used to intensify the removing process of antimony from the refractory gold ores. The effects of sodium sulfide concentration, sodium hydroxide concentration, temperature, time and ultrasonic power on the removal rate of antimony were studied in detail. The leaching of gold from the treated ore was also …Web
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Selective alkaline leaching of antimony from Low-grade refractory …
However, as the gradual depletion of easy-to-treat gold ore reserves, the complex structure refractory gold concentrates, with low-grade and embedded fine particle size, high-antimony and high-lead impurity content have become the main raw materials for gold extraction (Rusalev et al., 2018, Li et al., 2016).Web
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Processing of refractory gold ores
In whatever way a refractory ore is defined, economic methods must be found to improve gold recovery. During the last ten years, increasing attention has been given by operating companies, research organizations, and engineering and consulting companies to refractory ores, and quite a large number of possible processes have been developed ...Web
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Leaching Kinetics of Antimony from Refractory Gold Ore in …
The leaching kinetics of antimony from refractory gold ore in alkaline sodium sulfide was investigated under ultrasound. The influence of factors such as stirring speed, temperature, the concentration of sodium hydroxide and sodium sulfide and particle size, was studied. The leaching kinetics has also been studied under convention and …Web
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The lonely element Antimony | Periodic Table | ChemTalk
Sodium sulfide leaching can isolate antimony from refractory gold ore. This method works by extracting antimony in the form of sodium pyroantimonate. First, antimony leaches from the gold ore in a sodium sulfide solution. Then, the sodium thioantimonite-containing leaching solution goes through a pressure oxidation step to produce sodium ...Web
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Development of a Two-Stage Hydrometallurgical Process for …
A basic technological flow sheet diagram for processing the flotation gold–antimony concentrate from the Olimpiadinskoe deposit was developed, including …Web
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Pretreatment of a refractory arsenopyritic gold ore using hydroxyl …
Celep et al., 2011a, Celep et al., 2011b and Alp et al. (2014) increased silver and gold extraction, in a subsequent cyanidation from a refractory antimony ore, using an alkaline pretreatment with Na 2 S and NaOH (2011a), NaOH (2011b) and KOH (2014), achieving up to 94% silver extraction and 87% of the gold with 86% antimony removal …Web
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A review of the technologies for antimony recovery from refractory …
Many countries will have to rely on recovering antimony from refractory ores and metallurgical residues. For the purpose of efficient and selective antimony recovery with minimal economic cost and environmental impact, researchers proposed various innovative pyrometallurgical, hydrometallurgical, and electrochemical processes. ...Web
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Bio-oxidation of refractory gold ores containing stibnite and
Most of the works focused on antimony dissolution from high-grade sources. One example is the work of Torma and Gabra (1977), who studied the effect of the stibnite concentration (2%–14% (w/v)) in the ore on the antimony dissolution by At. ferrooxidans at pH 1.75 and 35 °C. The tests showed that the optimum concentration of antimony (1400 …Web
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Extraction of Gold from Refractory Gold-Bearing Ores by
Problems related to the effective processing of refractory gold ores containing carbon and arsenic are discussed. In the search for technologies for the extraction of gold from such ores, including those obtained from the Sayak-4 gold deposit, pyrometallurgical processing represents a possible direction. The results of an …Web
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A review on the negative impact of different elements during
The ongoing depletion of gold and silver-containing ore deposits demands a shift towards the processing of more complex sources. Leaching of gold or silver from these sources, which are named refractory and are typically low-grade, can be complicated due to one or more of the following effects: (1) kinetic or thermodynamic impediments on …Web
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A review of the technologies for antimony recovery from refractory …
Many countries will have to rely on recovering antimony from refractory ores and metallurgical residues. For the purpose of efficient and selective antimony recovery with minimal economic cost and ...Web
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Gold-bearing arsenopyrite and pyrite in refractory ores: analytical
Gold-bearing arsenopyrite and pyrite in refractory ores: analytical refinements and new understanding of gold mineralogy - Volume 71 Issue 2 ... Ashley, P.M., Creagh, C.J. and Ryan, C.G. (2000) Invisible gold in ore and mineral concentrates from the Hillgrove gold-antimony deposits, NSW, Australia ... Implications for ore genesis. Ore Geology ...Web
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A novel non-cyanide extraction method of gold for high As-Sb …
The As-Sb-S-bearing refractory gold ore generally expresses a similarly low Au-extraction performance because of Au-substances covered by the sulphide minerals. ... What is more, arsenic is a commonly associated metal of antimony which makes simultaneous processing critical. And gold extraction technology preferred to being non …Web
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Silver recovery aqueous techniques from diverse sources
The reaction of thiocarbazide with pentaerythritol tetrakis(3-mercaptopropionate) in the presence of mesoporous silica beads allows producing a composite sorbent (PTMF-SiO 2) with high affinity for silver.The high density of both N- and S-based reactive groups (about 5 mmol g −1) explains sorption capacities as high as 3 …Web
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Minerals | Free Full-Text | Clean Utilization of Limonite …
As a typical refractory iron ore, the utilization of limonite ore with conventional mineral processing methods has great limitations. In this study, suspension magnetization roasting technology was developed …Web
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Study on Pre-removal Antimony from Antimony–Gold
Antimony–gold concentrate is a refractory gold ore, and the direct cyanide leaching efficiency is very low . For antimony–gold concentrate with high antimony …Web
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Process flow-sheet for gold and antimony recovery from stibnite
A selective process for extracting antimony from refractory gold ore. Tian-zu Yang Rao Shuai Wei-feng Liu Du-chao Zhang Chen Lin. Materials Science. ... This paper details the hydrometallurgical method of processing of refractory gold antimony flotation concentrate. Investigation of feed material has been occurred. Mineralogical analyses …Web
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