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 …
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Request PDF | Extracting antimony from high arsenic and gold-containing stibnite ore using slurry electrolysis | This study investigated the leaching and electrowinning of antimony from a complex ...
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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 …
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1. Introduction. Arsenic is notoriously known as a highly toxic element present in the crust of the earth, directly or indirectly threatening human health and nature (Kyle et al., 2011).Arsenic is not only a problem during the mining of gold ores, but also can adversely affect operations and poses a health hazard to the personals of a factory …
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Typically, gold is encapsulated or finely disseminated in refractory gold ores and the direct cyanidation is not effective for gold extraction from these ores, even after the ore is ground to exceeding small particles (Nazari, 2017, Corrans and Angove, 1991).Especially for sulfide refractory gold ores, in order to recover gold, many …
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This study employed a two-stage leaching methods to selective extract arsenic and antimony from gold-bearing sludge. Arsenic was firstly removed through NaOH leaching, following by Na 2 S-NaOH leaching to remove antimony in the atmospheric conditions. The first step results show that more than 96% of arsenic can be removed …
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A method for extracting and separating Gold, Silver, Copper, Zinc and/or Lead from an Arsenic-containing ore, concentrate or tailings characterized in that the extraction is carried by roasting in the presence of a calcium-containing materialand at least one ofan alkali metal halide and alkaline metal halide. In the method, Arsenic remains …
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A method of extracting gold from arsenic gold ore concentrate, wherein increase the temperature of smelting chamber to 100-300° C. and then hold the temperature to remove the vapor and small quantity of dust in the arsenic gold ore concentrate; Under residual pressure≦50 Pa, increase the temperature of smelting …
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DOI: 10.1016/J.HYDROMET.2019.04.026 Corpus ID: 150110101; Extracting antimony from high arsenic and gold-containing stibnite ore using slurry electrolysis @article{Yonglu2019ExtractingAF, title={Extracting antimony from high arsenic and gold-containing stibnite ore using slurry electrolysis}, author={Zhang Yonglu and Chengya …
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Material and methods. A refractory gold ore from the Zancudo mine in Colombia were employed. The ASTM−100+ 200 mesh fractions (74–149 μm) of a …
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The association is caused by an atomic-scale attraction between gold and arsenic and the marriage is arranged by the structure of certain minerals. They found that when the minerals are enriched ...
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In this study, an additional stage in the processing of an arsenopyritic refractory gold ore was studied. Arsenic extraction in an alkaline pretreatment was …
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The improvement of the main method of removing arsenic from raw materials ... we conducted experiments to characterize the effects on gold extraction of ores using a range of sodium cyanide ...
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Results: 45% of gold extraction with a non-pre-treated sample; 86% after microwave roasting. Case 3 - A bromine-based solution was applied to extract gold from a sulphide gold ore (Sousa et al., 2018). ® Leaching solution: The leaching solution …
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The invention discloses a gold extraction agent for treating high-sulfur high-arsenic gold ore and a preparation method thereof, belonging to the technical field of gold extraction of gold ore, wherein the gold extraction agent comprises the following raw materials in parts by weight: 25-40 parts of sodium cyanate, 15-25 parts of dicyandiamide, 15-25 parts of …
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Therefore, high-sulfur and high-arsenic carbonaceous refractory gold ore cannot be treated effectively using cyanidation alone. In this study, an efficient and low-toxicity method for extracting gold from a high-sulfur and high-arsenic carbonaceous refractory gold ore was developed using a solution of bromate and ferric chloride. The …
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In this study, an efficient and low-toxicity method for extracting gold from a high-sulfur and high-arsenic carbonaceous refractory gold ore was developed using a solution of bromate and ferric ...
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Refractory gold ores are defined as minerals for which the cyanide-leaching recovery of gold is < 80%, even after fine grinding. High-arsenic refractory gold ores constitute the largest reserves but are the most difficult from which to extract gold. Gold leaching recoveries can often be as low as 50% (Yang, 2005). These poor results can be ...
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Gold has always been prized and coveted from ancient civilizations to modern society. While the quest for this precious metal may have changed over time, one thing has remained constant – the need for efficient methods of extracting gold from ore. Extracting gold from ore is a complex process that requires precision and expertise. …
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The improvement of the main method of removing arsenic from raw materials-oxidative roasting ref. [28]-aimed at preparing raw materials for the …
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Bioprocessing can be applied in gold recovery/extraction. These processes can be attractive for use on low-grade gold ores that are too expensive to process using conventional processes, and for ores that contain impurities which, in turn, contaminate conventional processing equipment (e.g. arsenic in gold ore).
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The invention discloses a gold extraction agent for treating high-sulfur high-arsenic gold ore and a preparation method thereof, belonging to the technical field of gold extraction of gold ore, wherein the gold extraction agent comprises the following raw materials in parts by weight: 25-40 parts of sodium cyanate, 15-25 parts of dicyandiamide, 15-25 parts of …
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The invention discloses a technology for extracting gold from a superfine carbonaceous gold ore containing arsenic sulfide. The gold extracting method is provided in a way of combining a complex technology. The technology is characterized in that gold losses caused by difficult dressing are avoided through the direct treatment of a primary ore; …
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New experimental results have been obtained on the behavior of arsenic and other associated metals (Re and others) under conditions of oxidative and reductive sintering. It has been established …
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Amalgamation is one of the oldest methods of extracting gold from its ores. The amalgamation of gold possibly dates from Roman times. ... For gold extraction the strength of cyanide solution ranges …
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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 …
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The gold in arsenic-bearing gold ores is closely symbiotic with arsenic-bearing minerals and pyrite, and gold is wrapped in fine particles, which is also the main reason for the refractory treatment of arsenic-bearing gold ores.. In order to improve the recovery rate of gold, it is necessary to remove arsenic from arsenic gold ores. …
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This study employed a two-stage leaching methods to selective extract arsenic and antimony from gold-bearing sludge. Arsenic was firstly removed through NaOH leaching, following by Na 2 S-NaOH leaching to remove antimony in the atmospheric conditions. The first step results show that more than 96% of arsenic can be removed …
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DOI: 10.1016/J.HYDROMET.2017.03.014 Corpus ID: 99624322; A selective process for extracting antimony from refractory gold ore @article{Yang2017ASP, title={A selective process for extracting antimony from refractory gold ore}, author={Tian-zu Yang and Rao Shuai and Wei-feng Liu and Duchao Zhang and Chen Lin}, journal={Hydrometallurgy}, …
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The invention discloses a method for extracting gold from copper-oxide oxidized gold ores. The method comprises the following steps: 1, carrying out ammonia-cyanide leaching on the copper-oxide oxidized gold ores to obtain an ore pulp; 2, adding hypochlorite into the ore pulp, and stirring to remove copper in order to obtain a copper removed ore …
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