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Accompanying the removal of antimony, gold and silver recoveries improved with increases in the KOH concentrations (5 mol/L) and temperature (80°C), and a decrease in the particle size (5 μm).
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Especially for sulfide refractory gold ores, in order to recover gold, many oxidation pretreatment technologies were proposed including pyrometallurgical and hydrometallurgical processes, and a comprehensive summary of the respective pretreatment technologies is summarized in Table 1. ... Process flow-sheet for gold and antimony recovery from ...
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A two-stage roasting process, similar to that used for arsenic sulfide ores, can also volatilize antimony oxides and prevent adverse reactions such as the production of metallic antimony, which can coat the surface of gold particles (Nagy et al., 1966) or the formation of silver glasses in high-silver ores (Matsukawa and Sakai, 1956).
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Because of the rise in gold prices, some antimony ores should really be viewed as gold ores with antimony as a by-product. ... method to recover gold from primary sulfide gold ores,and studied the ...
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Antimony recovery from stibnite ore by FeCl 3 (adapted with modifications from Ye et al. 2019a). Different pre-treatment methods have been investigated on Sb-bearing refractory gold or silver ores/concentrates for precious metals leaching.
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While the abovementioned works focused on the bioleaching of high grade antimony ores aiming at maximizing its leaching, the current work investigated gold recovery from a more complex sulphide matrix, in which antimony was present as the minor minerals stibnite and gudmundite, in addition to pyrite and arsenopyrite.
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In this process, gold could be effectively recovered from the sulfide refractory gold ore with a recovery efficiency of 98.06%. ... and antimony. The particle size of gold is tiny, ...
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Depending on the content of gold and antimony, the ores can be classified into different groups . The selection of a suitable technology is determined by the predominant valuable compounds (gold or antimony) in the ore or concentrate. ... Abbruzzese C. Process flow-sheet for gold and antimony recovery from stibnite. Hydrometallurgy. 2000;57:187 ...
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In this field, most gold-bearing antimony ores belong to difficult-to-treat minerals, and the high gold content in these ores has a very high economic value [11]. The widely used extraction technique involves utilizing the nature of antimony to trap precious metals, which are collected from the molten state of antimony at high temperatures to ...
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The refractory gold ore samples were obtained from Yunnan province in china. 5 kg of gold ore was crushed and milled to 50.24 μm (D50). After milling, the gold ore is stirred evenly. The mineral composition and relative content of gold concentrate were obtained by optical microscopy, MLA, chemical analysis data and gravity concentration (Table 1).
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It can be seen from Eq. () that Sb 2 S 3 is deposited on the surface of gold particles, forming a dense product layer and hindering the diffusion of CN − and O 2 to the gold particles, leading to low leaching ratio [3, 4].Effect of Antimony on Pretreatment Process. The melting point of antimony compounds, generated in the roasting process of antimonial refractory gold ores, …
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A basic flowchart for the recovery of gold from its ore | Gulin … » More detailed! Antimony Recovery From Sulfur Ore And Impact Of Waste | … gold recovery from antimony ore stibnite; processing technology for antimony oxide ores; iron ore recovery machines in india; gold ore recovery and recycling; » More detailed! antimony processing plant
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Flotation offers a viable solution for extracting small amounts of sulfide gold ores as it can efficiently recover valuable metals even from low-grade or refractory ores. Extract gold from polymetallic gold ores. In addition to gold, such ores include copper, lead, zinc, tungsten, and antimony. This gold ore contains large sulfides (10%–20% ...
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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 cyanide diffusion or on the …
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Antimony was used as early as 4000 BC in containers, mirrors and bells. Stibnite, the major ore of antimony, was known and used in Biblical times as medicine and as a cosmetic for eyebrow painting. Antimony is from the Latin antimonium and stibnite is from the Latin stibium. Major Ores and Minerals Antimony is rarely found naturally as native ...
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Therefore, it is critical to develop effective pretreatment methods to remove harmful components such as arsenic and antimony from gold ore. In recent years, ... Improving gold recovery from a refractory ore via Na 2 SO 4 assisted roasting and alkaline Na 2 S leaching. Hydrometallurgy, 185 (2019), pp. 133-141.
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ABSTRACT The global reserve of antimony is gradually declining while its demand continuously grows, rendering antimony an increasingly scarce metal. Antimony has been highlighted as a critical raw material in the EU owing to its economic significance and high supply risk. Due to the dispersed uses and low antimony concentration of the main antimony end-use, …
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(3) Cyanidation suffers less adaptability to ores, which results in a low gold recovery w hen dealing with refractory gold ores. Pretreatment is an indispensable process in the treatment of
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As well, examples of refractory gold recovery with alkaline sulfide hydrometallurgy such as an arsenopyrite gold concentrate application, a chalcopyrite gold concentrate application, a pregrobbing gold ore application and a cyanide …
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At present, more than 35% of China's gold resources (with a total amount of more than 1,000 tons) are difficult to be exploited and smelted, and about 700 tons of gold ores with high arsenic, antimony or sulfur are difficult to be directly cyanide leached (Lei et al., 2016).However, as the gradual depletion of easy-to-treat gold ore reserves, the complex …
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chalcopyrite. These ores are often refractory, as the gold is encapsulated within the sulfide matrix. In order to recover the gold, the host matrix must be destroyed. Over the past 100 years, roasting or smelting has been the dominant method for oxidising sulfide bearing gold ores and concentrates. However, with the cost associated with treating SO
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et al, 2018). In refractory gold ores, the gold is highly encapsulated in the sulfide matrix and pre-treatment is an important process to recover gold from the sulfide minerals. The sulfide minerals interfere with recovery of gold thus it is imperative to remove the …
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Semantic Scholar extracted view of "Selective removal of antimony from refractory gold ores by ultrasound" by Ping Guo et al. Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo ... A review of the technologies for antimony recovery from refractory ores and metallurgical residues.
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The leaching rate of gold after antimony removal increased from 13.35% to 40.56% under conventional leaching. Moreover, the leaching rate of gold after antimony removal was improved to 68.90% by ultrasound. Ultrasound breaks up mineral particles and decomposes pyrite to expose antimony and gold to leachate.
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Until relatively recently biohydrometallurgy was largely confined to just two industrial applications: the processing of low-grade copper ores, 99 and the recovery of ultrafine gold particles from refractory ores that are resistant to cyanation. 100–102 The BIOX® 103 and Bacox™ processes 104 are examples of this and are estimated to ...
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In general, it is suitable for antimony containing refractory gold ores. The principle is that gold can be enriched into smelting product directly. The refractory gold ore with a high content of antimony (25.0–35.0% Sb, Au 30 g/t) is commonly used as an important raw material in the smelting of antimony . The melting products are antimony ...
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DOI: 10.1016/S0304-386X(00)00107-9 Corpus ID: 98163036; Process flow-sheet for gold and antimony recovery from stibnite @article{Ubaldini2000ProcessFF, title={Process flow-sheet for gold and antimony recovery from stibnite}, author={Stefano Ubaldini and Franc Vegli{`o} and Pietro Fornari and Carlo Abbruzzese}, journal={Hydrometallurgy}, year={2000}, volume={57}, …
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application to arsenic, antimony and mercury bearing ores, concentrates, by-products, and other materials. 1. Fundamental Alkaline Sulfide Hydrometallurgy ... A proprietary gold recovery process has been adopted to quantitatively and selectively recover gold from complex alkaline sulfide solutions containing a mixture of metals
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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.Changes in physicochemical properties of the calcines suggested that this reduced the sintering as well as facilitated the formation of pores and a water soluble …
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An 80 per cent gold recovery was made by the method of treatment described. It is generally known that antimony can be readily volatilized, and by roasting stibnite (Sb2S2) in an oxidizing atmosphere, antimony oxide can be …
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The raw antimony gold concentrate used for the tests was analyzed and the details were summarized in Table 1.This ore was leached in a Ф2000 × 2500 leaching tank and the resultant slurry was filter using a 250 m 2 pressure filter to obtain both solid (gold concentrate) and liquor (antimony leach solution, typical components seeing Table 2).
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Flotation test work on high throughput Ore B indicated that gold can also be concentrated to an extent by concentrating the sulphide component in the ore to mass pulls of 15 to 30 wt%, with gold recovery of 60 to 70%. Maximum Au, Ag and sulphide recoveries of 70%, 45% and 89%
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To avoid the adverse effects of antimony on the cyanide leaching process used for the recovery of gold from refractory gold ore, a cleaner production process was proposed that would selectively ...
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Another important use of antimony (approximately 6%) is as a catalyst in the production of PET polymers. Global end-uses are reported for the years 2008, 2010 (Dupont et al., 2016) and 2011 (BRGM ...
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In this study, A novel method for gold recovery from refractory gold ore was proposed with the purpose of improving recovery efficiency of gold and reducing environmental …
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To avoid the adverse effects of antimony on the cyanide leaching process used for the recovery of gold from refractory gold ore, a cleaner production process was proposed that would selectively ...
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