However, gold–antimony ores often exhibit a refractory behavior due to the association of gold with sulfides, such as antimonite (Sb 2 S 3), pyrite (FeS 2), and arsenopyrite (FeAsS). The …
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, …
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 ...
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}, …
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 …
Recovery of gold from refractory ores requires a pretreatment to liberate the gold particles from the host mineral. In particular, in the case of stibnite (Sb 2 S 3), the antimony (Sb) forms stable compounds with sodium cyanide (NaCN) during the cyanidation process; as a consequence, cyanide consumption increases.Pretreatment is usually an oxidation step.
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.
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 ...
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).
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 …
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 ...
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
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).
(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
Invisible gold in ore and mineral concentrates from the Hillgrove gold-antimony deposits, NSW, Australia. Miner. Deposita. ... A review of the technologies for antimony recovery from refractory ores and metallurgical residues. 2024, Mineral Processing and Extractive Metallurgy Review.
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 …
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 ...
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.
The antimony content in crude antimony was 94.31%. Although this process with short flow could eliminate the low-concentration SO 2 pollution, the antimony recovery rate and the antimony content in crude antimony were low. In the treatment of high arsenic and gold-containing stibnite concentrate, the problem of arsenic alkali residue is still ...
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 ...
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 …
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, …
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
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.
by processing of gold, copper, and lead ores with high contents of antimony. Most of these residues are currently discarded or stockpiled, causing environmental concerns. ... overview of the existing attempts to recover antimony from secondary sources. The paper also discusses the possibility of waste valorization schemes to guarantee a more sus-
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).
Recovery of gold from refractory ores requires a pretreatment to liberate the gold particles from the host mineral. In particular, in the case of stibnite (Sb 2 S 3), the antimony (Sb) forms stable compounds with sodium cyanide (NaCN) during the cyanidation process; as a consequence, cyanide consumption increases. Pretreatment is usually an oxidation step. ...
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}, year={2017}, volume={169}, …
A novel eco-friendly synthetic gold lixiviant (Jinchan) was used to recover gold from gold ores. Ultrasound was used to improve gold leaching efficiency and recovery percentage. The differences between ultrasonic and conventional leaching were investigated by comparing the effects of temperature, ultrasonic power, pH variation, and Jinchan ...
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 ...
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 …
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% ...
Antimony can be removed successfully from antimonial refractory gold ores with Na 2 S–NaOH as leaching agents. However, many factors on the recovery of antimony from …