2012年11月1日 Through this study, 95% copper and 90% cobalt were shown to be leachable from a DRC copper–cobalt ore by ammonium roasting at the following optimal conditions: the
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In this work, we investigated the mechanism of enhanced vanadium extraction from shale ore by suspension oxidation roasting (SOR) by comparing the leaching behavior between traditional
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Roasting is a process of heating a sulfide ore to a high temperature in the presence of air. It is a step in the processing of certain ores. More specifically, roasting is often a metallurgical process involving gas–solid reactions at elevated temperatures with the goal of purifying the metal component(s). Often before roasting, the ore has already been partially purified, e.g. by froth flotation. The
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The papers in this volume give the reader focused information on the important extractive metallurgy unit operations of drying, roasting, and calcining
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A process is provided for extracting vanadium values from a vanadium-bearing ore in which a carbonaceous material is added to a salt roast mixture containing ore and an alkali metal salt,...
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2023年9月25日 It is to produce sodium salt soluble in water by roasting after adding an appropriate amount of sodium agents (such as Na 2 CO 3, NaCl, Na 2 SO 4, etc.) to the ores
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1992年12月1日 Thermodynamic analysis of a non-polluting process for the effective treatment of lean multimetallic sulphide ores is presented. The sulphide ore is roasted with sodium chloride in air. Metal...
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2019年6月7日 The dual effect of sodium-salt-assisted reductive roasting for iron recovery and chromium enrichment from lateritic iron ore was investigated. Iron oxides were reduced to
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Peterson et al. patented a blend of muriate of potash and sylvinite ore (sodium and potassium chloride) to recover lithium from its ores at 980–1100 °C. The reaction of this invention is an exchange reaction between the alkali metals of
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2021年3月29日 Abstract Nickel is mostly extracted from sulfide ores, however, laterite ores account for over 60 pct of all nickel resources in the world, and despite its predominance, there is no well-established process to extract nickel from such ores. Nickel in laterites is hosted in many different compounds such as oxides, hydroxides, and silicates minerals. The sulfation
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2022年5月3日 @article{Gao2022ACS, title={A Comparative Study of Extracting Vanadium from Vanadium Titano-Magnetite Ores: Calcium Salt Roasting Vs Sodium Salt Roasting}, author={Feng Gao and Hao Du and Shaona Wang and Bingxu Chen and Jianzhong Li and Yi Zhang and Meng Li and Biao Liu and Afolabi Uthmon Olayiwola}, journal={Mineral Processing
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2011年2月4日 To explicate the thermodynamics of the chromite ore lime-free roasting process, the thermodynamics of reactions involved in this process was calculated and the phrases of sinter with different roasting times were studied. The thermodynamics calculation shows that all the standard Gibbs free energy changes of the reactions to form Na2CrO4, Na2OFe2O3,
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2016年12月1日 Chromium has a wide range of applications including metals and alloys manufacturing, pigments, corrosion resistance coatings and leather tanning. The production of chromium chemicals is based on the oxidative alkali roasting of chromite ores, which leads to the formation of water-soluble alkali chromates. Previous investigations reported that when
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2022年5月3日 Salt-free roasting/acid leaching may oxidize and partially volatilize vanadium, making the subsequent acid leaching difficult [16]. The vanadium extraction rate is generally low due to the low ...
More2022年9月27日 In recent years, several methods have been reported to extract lithium (Li) from spodumene. However, the majority of them still require the transformation of the naturally occurring spodumene phase (α) to the more reactive crystalline phase (β) by calcination at 1100 °C. To address the economic drawbacks and high greenhouse gas emission of this phase
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Salt roasting-leaching (SRL) and Fluoride-enhanced direct leaching (FDL) are common method for V extraction. Sodium and calcium salts are used as additive to enhancing V leaching. Sodium roasting is an efficient method ( Yang et al., 2017 ) with a highly adaptability to all type V-bearing shale ore, and had a more obvious activation effect on V-bearing minerals.
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2015年2月16日 Effect of Additives on Phase Transformation of Nickel Laterite Ore During Low-Temperature Reduction Roasting Process Using Carbon Monoxide (Pages: 177-184) Shiwei Zhou , Bo Li , Yonggang Wei , Hua Wang , Chengyan Wang , Baozhong Ma ,
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2022年12月22日 The conventional process of lithium extraction from α-spodumene requires high-temperature calcination to transform α-spodumene into β-spodumene, and concentrated acid roasting followed by water leaching. This study proposed the direct preparation of water-soluble lithium salts from α-spodumene by roasting with different sulfates to avoid the use of
More2023年9月25日 It is to produce sodium salt soluble in water by roasting after adding an appropriate amount of sodium agents (such as Na 2 CO 3, NaCl, Na 2 SO 4, etc.) to the ores or concentrate. For example, in the process of wet extraction of vanadium, the vanadium slag is finely ground, and then the iron beads are removed by magnetic separation.
More2015年2月16日 Effect of Additives on Phase Transformation of Nickel Laterite Ore During Low-Temperature Reduction Roasting Process Using Carbon Monoxide (Pages: 177-184) Shiwei Zhou , Bo Li , Yonggang Wei , Hua Wang , Chengyan Wang , Baozhong Ma ,
More2016年12月1日 Chromium has a wide range of applications including metals and alloys manufacturing, pigments, corrosion resistance coatings and leather tanning. The production of chromium chemicals is based on the oxidative alkali roasting of chromite ores, which leads to the formation of water-soluble alkali chromates. Previous investigations reported that when
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2022年12月22日 The conventional process of lithium extraction from α-spodumene requires high-temperature calcination to transform α-spodumene into β-spodumene, and concentrated acid roasting followed by water leaching.
MoreSalt roasting-leaching (SRL) and Fluoride-enhanced direct leaching (FDL) are common method for V extraction. Sodium and calcium salts are used as additive to enhancing V leaching. Sodium roasting is an efficient method ( Yang et al., 2017 ) with a highly adaptability to all type V-bearing shale ore, and had a more obvious activation effect on V-bearing minerals.
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DOI: 10.1016/J.HYDROMET.2012.06.014 Corpus ID: 97633860; A study of recovery of copper and cobalt from copper–cobalt oxide ores by ammonium salt roasting @article{Zhang2012ASO, title={A study of recovery of copper and cobalt from copper–cobalt oxide ores by ammonium salt roasting}, author={Mingzhu Zhang and Guocai Zhu and Yuna Zhao and Xiujuan Feng},
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244 Salt roasting of sulphide ores Common gangue materials will not react in the chlori- nation process. The gangue in sulphide ores generally con- sists of oxides such as silica, alumina, calcia ...
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Mercury in Gold Processing. N. Ahern, in Gold Ore Processing (Second Edition), 2016 2.1 Oxidative Pretreatment. During roasting of gold ores and concentrates, mercury is released to the gas phase, with the extent of release dependent on the mineralogical composition of the roaster feed and on the roasting conditions (temperature, roasting atmosphere and roasting
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The dual effect of sodium-salt-assisted reductive roasting for iron recovery and chromium enrichment from lateritic iron ore was investigated. Iron oxides were reduced to metallic iron through reductive roasting, while Al- and Si-bearing components were transformed to sodium aluminosilicate and/or diaoyudaoite. Thus, direct reduced iron (DRI) was recovered by
More2023年1月15日 Lithium production in China mainly depends on hard rock lithium ores, which has a defect in resources, environment, and economy compared with extracting lithium from brine. This paper focuses on the research progress of extracting lithium from spodumene, lepidolite, petalite, and zinnwaldite by acid, alkali, salt roasting, and chlorination methods, and analyzes
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Keywords: chromite ore, oxidative roasting, molten salt phase, NaOH, KOH, chromium recovery 1. Introduction Le Chatelier, in the 19th century, first applied alkali roasting in oxidising conditions for the extraction of sodium chromate from chromite ores [1, 2].
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