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1.1.1. Nomenclature, synonyms, trade names, molecular formulae, and relative molecular mass. Multiple agents are considered in this monograph as follows: the trivalent antimony compounds antimony(III) oxide (Sb 2 O 3) [antimony xide], antimony(III) chloride (SbCl 3), antimony(III) potassium tartrate (C 8 H 10 K 2 O 15 Sb 2 or the anhydrous …
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Antimony oxide ore beneficiation has become one of the world's largest mineral processing conundrums. In recent years, many experimental studies dealing with antimony oxide ore have been carried out, resulting in new technical achievements. Much attention has been paid to improving the mineral processing technology of antimony oxide based …
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It can be illustrated that the pre-oxidation of the gold ore by Mn-oxide oxidation controlled Au-extraction efficiency, and with the dissolution of 93.3 % As and 92.5 % Sb from the gold ore in the usage of Mn-oxide-assisted hydrochloric acid oxidation process, it obtains Au extraction ratio of 97.2 % by chlorination leaching.
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INTRODUCTION. Antimony (Sb) (atomic number 51; atomic mass 121.75 g/mol; density 6.684 g/cm 3; melting point 631°C) occurs naturally as a sulphide ore, stibnite (Sb 2 S 3) and valentinite (Sb 2 0 3).The traditional method of treating the ore is to roast it with charcoal or coke and collect the volatile oxide fume (Sb 4 O 6) from which pure …
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Arsenic pre-removal from antimony oxide powder by roasting with pyrite (FeS2) for decreasing arsenic transfer and pollution in the followed antimony smelting process. ABSTRACT Most of arsenic in the stibnite enters the antimony oxide powder after a traditional volatilization smelting/roasting process and further transfers into an arsenic …
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The optimum alkaline leaching conditions of 5% NaOH, temperature 90 to 95 °C in 90 min was obtained for leaching zinc from an oxide ore 17. The column leaching of low grade zinc oxide ore ...
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Environmentally Friendly Leaching. Keywords: hydrometallurgy; solvometallurgy; antimony; leaching; critical raw materials; deep . of Antimony from …
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The principal antimony ore exists in the form of ... The storage of plastic water bottles at higher temperatures increases antimony leaching, further contaminating the water contained within ... (III), Bi(III), Zn(II) Oxides, and Antimony Compounds from Metal Oxide Varistors. J. Sustain. Met. 2018; 4:194–204. doi: 10.1007/s40831-017-0156 …
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The process included three steps: 1) leaching of antimony from the refractory gold ore with sodium sulfide solution; 2) pressure oxidation of the leaching …
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This study investigated the leaching and electrowinning of antimony from a complex, high arsenic and gold-containing stibnite concentrate ore (As-Au-Sb ore) using slurry electrolysis (SE). The results indicated that the leaching efficiency of antimony was higher than 98%, and those of iron and arsenic were about 5.50% and 1.14%, respectively.
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This study investigated the leaching and electrowinning of antimony from a complex, high arsenic and gold-containing stibnite concentrate ore (As-Au-Sb ore) using slurry electrolysis (SE). The results indicated that the leaching efficiency of antimony was higher than 98%, and those of iron and arsenic were about 5.50% and 1.14%, …
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Zn Leaching Recovery Reference; Zinc oxide ore: Ultrasound Lixiviant: NH 3 –(NH 4) 2 SO 4: 600 W, 60 min, 30 °C: 83.33%: Zinc oxide ore: ... Zhang et al. optimized the leaching conditions of Pb from antimony and lead-rich oxidizing slag in HCl-NaCl media with the assistance of ultrasound. They found that the leaching percentage of Pb …
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Whether it is a single sulfide antimony ore or a sulfide-oxide mixed antimony ore, gravity separation can be used for sorting. Advantages: Gravity separation can effectively sort a large amount of ...
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Studies of oxide leaching antimony from refractory gold ore. March 2021. Thesis for: Bachelor degree. Advisor: Tian QingHua. Authors: Michael Kabangu Ngoie. …
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To shed light on the leaching of Sb from mine wastes containing stibnite, two series of experiments were conducted. In one experiment, polished slabs of a museum-grade stibnite and a mixed-sulfide ore sample containing 28% Sb were subjected to accelerated weathering at humidity and 31-35 o C for 37-44 days. After leaching with distilled …
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1. Antimony – general aspects. Antimony comes under group 15 of the periodic table with ground state electronic configuration [Kr]4d 10 5s 2 5p 3. 121 Sb (57.21% abundance) and 123 Sb (42.7% abundance) are the two stable isotopes of antimony. Antimony can possess different oxidation states (such as +5, +3, 0, −3 and −5), but …
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The process requires the use of hydrochloric acid as leaching solution when treating copper ores, which may be produced in the plant itself. The operation is very simple, using sulphuric acid and NaCl as raw materials. Our experiences have been done with solutions containing 36 grs. of hydrochloric acid per liter of solution in order to have …
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Raschman and Sminčáková (2012) reported that more than 90% antimony recov- Most of antimony produced from antimony-bearing ores is used as ery during 60 min leaching of a stibnite ore at 19 °C using an alkaline so- flame retardants, catalysts in plastics production, pigments in paints lution containing 1% Na2S and 1% NaOH (w/w) has been ...
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Indeed, antimony oxides are difficult to recover by froth flotation, especially due to their poor response to xanthate collectors (Lager and Forssberg, 1989a) and also …
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maximize gold dissolution, e.g., a ratio between 2 and 20 is ideal for a sul de gold ore12 and a ratio <1 is ideal for an oxide gold ore.5 fi Temperature appears to be less important: the gold ...
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Improved gold and silver extraction from a refractory antimony ore by pretreatment with alkaline sulphide leach. 2011 •. Haci Deveci, ibrahim alp. Download Free PDF. View PDF.
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Antimony is classified as a critical/strategic metal. Its primary production is predominated by China via pyrometallurgical routes such as volatilization roasting—reduction smelting or direct reduction smelting. The performance of most of the pyro-processes is very sensitive to concentrate type and grade. Therefore, technology …
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Fig. 1. Typical pyrometallurgical antimony production process using sulfide ore. Full size image. Antimony xide Production. There are four processes: (1) …
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Microwave digestion revealed that the PET plastic used by one brand contained 213±35 mgSb/kg plastic; leaching of all the antimony from this plastic into 0.5 L of water in a bottle could result in an antimony concentration of 376 ppb. Clearly, only a small fraction of the antimony in PET plastic bottles is released into the water.
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The leaching kinetics of antimony from refractory gold ore in alkaline sodium sulfide was investigated under ultrasound. The influence of factors such as stirring speed, temperature, the concentration of sodium hydroxide and sodium sulfide and particle size, was studied. The leaching kinetics has also been studied under convention and …
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Copper, arsenic and antimony react with alkaline or leaching agent, which may form a passivation layer on the surface of gold inhibiting the gold leaching. In order to control the loss of gold and remove Cu, As and Sb, it is necessary to know the dissolution efficiency of Cu, As, Sb and gold during oxidation pretreatment.
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In this study, the following leaching parameters were tested to optimize the gold recovery for the first time from an oxide ore using the response surface methodology: initial thiocyanate ...
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Jhunalyn Parantar. Sulphide ores of copper are insoluble in dilute sulphuric acid leaching solutions, but a very high extraction can be obtained if the copper ore is in the oxidized condition. The problem is to convert the …
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Ammoniacal thiosulfate leaching of refractory oxide gold ore. International Journal of Mineral Processing (2017) ... Accordingly, the optimized process results are determined as follows: the extraction rates of antimony and gold reach 94.15% and 3.37%, respectively, under Na 2 S concentration of 85.66 g/L, NaOH concentration of 45.5 g/L, ...
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