In the Earth's crust, antimony (Sb) accumulates in ore deposits with stibnite as the most common Sb mineral. During weathering of the primary ores, Sb is released in the environment and forms secondary minerals. Although Sb bioavalaibility and transport mechanisms in soils, water, and sediments were investigated ([1] and ref. therein), only …
Selective arsenic-fixing roast of refractory gold concentrate. A novel pretreatment technique suitable for gold extraction from refractory ores was developed. The technique was based on selective arsenic fixing, using …
The association of gold and antimony in many ores provides additional complications in the gold extraction process. Improvements in mineralogical identification and understanding of the chemistry of the cyanidation process with antimony present are leading to improved treatment processes for antimonial gold ores. Updates from …
Orogenic antimony-gold deposits contribute significantly to the global antimony resource base. China's orogenic antimony-gold deposits are primarily in southern Tibet. Investigations indicate that antimony combines and migrates with sulfur hydroxides in ore-forming fluids. Previous research on fluid inclusions in orogenic …
Semantic Scholar extracted view of "pH-dependent release characteristics of antimony and arsenic from typical antimony-bearing ores." by Xingyun Hu et al.
The Stibnite-Yellow Pine district of central Idaho was mined from the early 1900s until the 1990s, extracting gold, antimony, tungsten, and mercury from veins and disseminated and replacement ores…
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.
The mineral assemblages were stibnite + pyrite + calcite + quartz ± minor scheelite in antimony ores. This study presents quantitative measurements of the trace element compositions of pyrite and stibnite from the Yangla antimony ores.
Perpetua Resources Corp., through its wholly owned subsidiaries, is focused on the exploration, site restoration and redevelopment of gold-antimony-silver deposits in the Stibnite-Yellow Pine ...
Therefore, the world's demand for antimony is increasing, and stibnite is also listed by the EU as a key raw material list in 2020 [2].
The two major ores of antimony, stibnite and jamesonite, are found with lead ores in nature [ 17 ], resulting in high concentrations of lead (0.1–5%) in crude antimony, very far from the commercial requirements of <0.2% [ 78 ].
Semantic Scholar extracted view of "Antimony transformation and mobilization from stibnite by an antimonite oxidizing bacterium Bosea sp. AS-1." by Li Xiang et al.
Antimony is not typically found in its pure form in nature, but it is commonly found as a component of certain minerals and ores. The primary source of antimony is the mineral stibnite, which is composed of antimony sulphide (Sb2S3).
Many minerals contain antimony; however, stibnite and antimonial lead ores are the main sources of the metal. Stibnite (Sb2S3) and its alteration oxide, stibiconite (Sb 3+ Sb 25+ O 6 (OH)), were the only minerals mined in Arkansas for this metal. Stibnite is steel-gray, has a relatively high specific gravity (4.6), and has a metallic luster. It often …
A gradual increase of Sb isotope ratios from the proximal to the distal parts was observed in stibnite ores. Rayleigh distillation models the systematic variation trend of the Sb isotope values, demonstrating that ore fluids are preferentially enriched in heavier Sb isotopes during the precipitation of isotopically light stibnite.
In this study, we demonstrate that a bacterial isolate Paraccocus versutus XT0.6 from the Xikuangshan antimony mine, the world largest antimony deposit, is capable of stibnite dissolution, oxidation of Sb (III), and formation of secondary Sb (V) bearing mineral. The isolate could oxidize dissolved Sb (III) aerobically and anaerobically.
Semantic Scholar extracted view of "Process flow-sheet for gold and antimony recovery from stibnite" by S. Ubaldini et al.
The main antimony products in international trade are stibnite and subordinate stibnite-berthierite and tetrahedrite ores and concentrates, antimony metal, antimony trioxide and antimonial lead.
Abstract. "Antimony resources are rich in china, its reserves and productions are ranking the first in the world. The Chinese antimony mineral resources are mainly existed in the form of three types, such as stibnite, antimony-gold ores andjamesonite. The antimonial dust that produced from lead smelting process is an important secondary ...
This Chapter describes Stibnite (abbrv. sbt), as seen with optical, reflected light microscopy. After summing up compositional data, main properties and optical parameters, the presentation follows a systematic scheme to facilitate consultation and comparison with other ores. The description comprises qualitative observations under …
The extraction of antimony from ores depends on the quality of the ore and composition of the ore. Most antimony is mined as the sulfide; lower grade ores are concentrated by froth flotation, while higher grade ores are heated to 500–600°C, the temperature at which stibnite melts and is separated from the gangue minerals.
The principal ore minerals of antimony are stibnite and jamesonite, but it can also be a byproduct of certain other minerals. Eighty percent of the world's antimony is produced from two types of deposits — carbonate replacement deposits and gold-antimony epithermal deposits.
Finally, an environment friendly process of removing and recovering antimony from antimonial refractory gold ores was proposed. This process provides a positive guidance for the extraction of antimony from antimonial refractory gold ores owing to high removal ratio of antimony and low production cost.
Natural variation in the isotopic composition of Sb in stibnites (Sb ores) was explored using multi-collector ICP-mass spectrometry (MC-ICP-MS). A method for isolating Sb (after acid digestion) without introducing artificial mass fractionation was developed, based on the use of a combination of cation exchange chromatography using Dowex …
In order to investigate the release process of antimony from stibnite under the leaching effect of rain and snow in Hunan Xikuangshan(XKS) mining area, some important environmental factors are selected: dissolved oxygen, Fe(III) and Pseudomonas sp. AO-1 (referred to as AO-1). The one-factor batch sequence experimental method is …
Stibnite (Sb 2 S 3) is the predominant ore mineral of antimony. The most important use of antimony metal is as a hardener in lead for storage batteries. The metal also finds applications in solders and other alloys. Antimony trioxide is the most important of the antimony compounds and is primarily used in flame-retardant formulations.
Some stibnite gold ores are more amenable to cyanidation when previously subjected to surface oxidation in the pulverulent condition, with the formation of a sulphate film, which on contact with water yields an insoluble basic sulphate. The oxidation may also open up the fissure planes, setting free the associated gold. This oxidation may be …
Antimony ores are dominated by antimony(III) minerals, the antimony(III) sulfide stibnite, and the antimony(III) oxide valentinite. These compounds of antimony are commonly found in ores of copper, silver, and lead.
Ores containing large quantities of sulphur, arsenic, or antimony may sometimes be roasted with advantage as a preliminary to fusion. Roasting is effected in shallow circular clay dishes, in a muffle, or in the crucibles in which the fusion is afterwards performed. The temperature must be kept low at first and the ore frequently stirred with …
