The sources of arsenic and the various process options for treating arsenical gold ores and concentrates are briefly reviewedThe problem relating to the removal of arsenic from gaseous emissions ...
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This paper deals with the design and engineering of Dundee Sustainable Technology Inc's approach to removing arsenic from a refractory gold concentrate produced at a mining operation in Europe, combined with DST's Glasslock process to permanently stabilize the removed arsenic.
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Gold ores are considered refractory if gold extractions from a conventional cyanidation process are less than 80% even after fine grinding. 1) Arsenic-bearing refractory gold ore has stones extremely difficult to deal with. In the stones, gold is locked up in arsenic mineral matrix as the form of microscopic or submicroscopic lattice.
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In this paper, the removal of arsenic from arsenic-bearing gold ore through air oxidation and sodium hydroxide leaching with microwave irradiation was studied. Firstly, single-factor experiments were carried out.
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In this paper, the removal of arsenic from arsenic-bearing gold ore by air oxidation and sodium hydroxide leaching with the microwave irradiation was studied. Firstly, single factor experiments ...
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In this paper, the removal of arsenic from arsenic-bearing gold ore through air oxidation and sodium hydroxide leaching with microwave irradiation was studied. Firstly, single-factor experiments were carried out.
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Several different classes of process options for pretreating refractory ores are considered. These options include: roasting oxidation; wet chemical treatment; bacterial peroxidation; and other …
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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 experimental study of the Reducing …
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Arsenic removal from solid residues has been mainly based on leaching procedures, followed by precipitation steps, with the form of crystalline ferric arsenate (FeAsO 4 2H 2 O - scorodite). The phytoremediation technique has been used as an alternative approach for remediation of residues or contaminated soils from mining and smelting ...
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This paper discusses the removal of arsenic scorodite from the gold ore. Kinetic studies on the possibility of removal of arsenic in a compact shape of arsenic sulfide were carried out, which ...
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The aim of this study is to apply the alkaline leaching process for arsenic removal in a gold-bearing ore from Miraflores mine, located in Cerro Azul. An experimental reactor will be...
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Several different classes of process options for pretreating refractory ores are considered. These options include: roasting oxidation; wet chemical treatment; bacterial peroxidation; and other pre-treatments such as: eliminating arsenic in vacuum, volatile smelting, segregation of roasting, electrochem-ical oxidation.
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The study's purpose is to evaluate the effectiveness of an alkaline leaching process for arsenic removal. The ore underwent thorough characterisation, employing advanced techniques like fire...
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This paper deals with the design and engineering of Dundee Sustainable Technology Inc's approach to removing arsenic from a refractory gold concentrate produced at …
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The results showed that it is possible to remove arsenic without altering the subsequent release of gold (80%). The best conditions were: 0.1 M oxalic acid for 1 h and at 70 °C. Finally, it was observed that the concentration of As released into the subsequent thiosulfate leach decreases by 97.7% (from 640 to 15 mg/l), thereby conserving its ...
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In this paper, the removal of arsenic from arsenic-bearing gold ore by air oxidation and sodium hydroxide leaching with the microwave irradiation was studied. Firstly, single factor experiments ...
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Wet chlorination uses chlorine (or chlorine oxidant) to dispose of Arsenic-bearing refract-tory gold ore. It is an effective method for the carbon refractory gold ore and is used in preprocess of high arsenic gold ore. Beijing General Research …
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Arsenic removal from solid residues has been mainly based on leaching procedures, followed by precipitation steps, with the form of crystalline ferric arsenate (FeAsO …
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Arsenic has been commercially recovered from realgar and orpiment in China, Peru, and the Philippines, and from copper-gold ores in Chile. Minerals containing arsenic: Realgar, Getchell Mine, Potosi Mining District, Humboldt Co., Nevada (Sample 15952, New Mexico Bureau of Geology and Mineral Resources Mineral Museum, Gift of Monty Mortimer).
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The results showed that it is possible to remove arsenic without altering the subsequent release of gold (80%). The best conditions were: 0.1 M oxalic acid for 1 h and at …
WhatsApp: +86 18221755073
The aim of this study is to apply the alkaline leaching process for arsenic removal in a gold-bearing ore from Miraflores mine, located in Cerro Azul. An experimental reactor will be utilised to
WhatsApp: +86 18221755073
Wet chlorination uses chlorine (or chlorine oxidant) to dispose of Arsenic-bearing refract-tory gold ore. It is an effective method for the carbon refractory gold ore and is used in preprocess of high arsenic gold ore. Beijing General Research Institute of Mining and Metallurgy has studied a refractory gold ore bearing high arsenic in Guizhou.
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The study's purpose is to evaluate the effectiveness of an alkaline leaching process for arsenic removal. The ore underwent thorough characterisation, employing advanced techniques like fire...
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Gold recovery was proportional to arsenic extraction during the oxidative leach, with >90 pct Au extraction for arsenic extraction ≥ 89 pct. Silver extraction did not follow this trend and ranged from 47 to 62 pct. Cyanide consumption was 2.6 kg NaCN per metric ton of leach residue and 5.7 kg NaCN per metric ton for the untreated ore.
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Arsenic has been commercially recovered from realgar and orpiment (arsenic sulfide minerals) in China, Peru, and the Philippines, from cobalt-arsenide ores in Morocco, and from copper-gold ores in Chile2.
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There are many kinds of symbiotic and associated minerals of gold, and arsenic is one of them. The gold in arsenic-containing gold ores is often encapsulated as fine grains, which makes gold leaching difficult. Therefore, for arsenic-containing gold ores, arsenic removal is the key. So how to remove arsenic? Using the right pretreatment method is the key.
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2.1. Materials. The flotation concentrate of the gold-bearing pyrite-arsenopyrite sulfide ore was used in the experiments. The mineral composition of the ore concentrate was as follows: FeS 2 (48 wt%), FeAsS (35 wt%), ZnS, CuFeS 2, PbS, Au (135.2 g/t), and Ag (160 g/t).The contents of sulfidic sulfur (S S) and sulfidic arsenic (As S) in the ore concentrate were …
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The NaOH–Na2S alkaline leaching process provides a simple and highly efficient way to remove arsenic from high-arsenic dust, leaving residue as a suitable lead resource. Read more Article
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The results showed that it is possible to remove arsenic without altering the subsequent release of gold (80%). The best conditions were: 0.1 M oxalic acid for 1 h and at 70 °C.
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In Ecuador, particularly in the El Oro province, gold mining has been historically hampered by arsenic contamination in the ores. This research addresses the persistent issue of arsenic in gold ...
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