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Acid leaching is considered an appropriate method for the tungsten concentrate treatment. However, it is difficult to leach wolframite efficiently. To reveal the origin of this behavior, the leaching behaviors of scheelite and wolframite in treating a mixed scheelite–wolframite concentrate by hydrochloric acid and the leaching …
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The accumulation of Fe 2+ and Mn 2+ in HCl solution reduced the digestion efficiency of wolframite. The process of atomization-oxidative thermal decomposition is feasible for …
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The wolframite concentrate was provided by Jiangxi Tungsten Group Co., Ltd., China. The concentrate contains WO 3 69.50%, Fe 11.12%, and Mn 6.56% as the main compositions as presented in Table 1.The X-ray diffraction (XRD) pattern of the concentrate (Fig. 1) shows that it is with high content of wolframite [(Fe,Mn)WO 4] and …
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Studies on the recovery of tungsten from a composite barite–scheelite concentrate ore were conducted utilizing a soda–silicon roast-Na 2 CO 3 solution leach technique. Scheelite and barite mainly compose this ore with a slight trace of other impure components. A high tungsten recovery ratio is not achievable by physical separation …
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Vietnam was the second-largest producer of tungsten concentrate, with a share of about 5% (4300 t), while Russia ranked third, with about 3% (2200 t), followed by Mongolia ... A WHIMS …
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98.6% of tungsten was recovered from the wolframite concentrate of Igarapé Manteiga after fusion with sodium hydroxide (650 °C, 1 h) and leaching the fused mass with water. At …
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At optimum conditions, a tungsten concentrate having a grade of 30.85% WO 3 with 75.72% recovery was obtained. This concentrate was further upgraded by magnetic separation to 34.11% W0 3 with more ...
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The results of bench-scale flotation experiments showed that the WO3 recovery of wolframite concentrate with 180 g/t SHA was 10.05% higher than that with 360 g/t BHA and 300 g/t Pb(NO3)2.
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With most high-quality tungsten ores being exhausted, the enhancement of low-grade scheelite concentrates processing has attracted a great deal of attention. The objective of this study is to develop a method to maximize the recovery tungsten and molybdenum from a low-grade scheelite via a new acid leaching process followed by …
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DOI: 10.1016/S0304-386X(00)00126-2 Corpus ID: 93280495; Studies on the recovery of tungsten from a composite wolframite–scheelite concentrate @article{Srinivas2000StudiesOT, title={Studies on the recovery of tungsten from a composite wolframite–scheelite concentrate}, author={K. Srinivas and T. Sreenivas …
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The innovative technology of coleaching scheelite concentrates by a mixture of sulfuric acid and phosphoric acid is an environmentally friendly and low-cost technology.
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This work presents the results of the tungsten recovery from a wolframite concentrate (61.5% WO3) from Igarapé Manteiga (Rondônia — Brazil) after fusion with NaOH …
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The wolframite concentrate was provided by Jiangxi Tungsten Group Co., Ltd., China, and contained WO 3 69.50%, Fe 11.12%, and Mn 6.56% as the main compositions as presented in Table 1. ... Sustainable and efficient recovery of tungsten from wolframite in a sulfuric acid and phosphoric acid mixed system. ACS Sustain. …
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Semantic Scholar extracted view of "Sustainable and efficient extracting of tin and tungsten from wolframite – scheelite mixed ore with high tin content" by Ren Huichuan et al. ... Acid leaching is considered an appropriate method for the tungsten concentrate treatment. However, it is difficult to leach wolframite efficiently. ... Recovery of ...
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The natural tungsten-bearing minerals need to be treated by minerals beneficiation to obtain a tungsten concentrate of ... Recently, several novel laboratory processes have been proposed in order to increase the tungsten recovery and adapt the ... The reaction time varies from 0.5 h to 4 h, depending on the type of wolframite …
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Extraction of tungsten from wolframite ore (Fe, Mn)WO 4 was achieved using ammonium phosphate salt as flux. The supplied ore was predominantly composed of iron-rich …
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Industrial practice has shown that a tungsten recovery higher than 98% for sheelite concentrate and 99% for scheelite-wolframite mixed concentrate is obtained, under the conditions of NaOH/WO 3 mole ratio of 3.6–4.8, 160–170 °C, and it is suitable to treat almost any sort of tungsten ore concentrates, including low grade complex ...
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A beneficiation study indicated that beneficiating wolframite-scheelite mixed ore with approximately 40% WO 3 content can guarantee a higher metal recovery ratio, instead of producing standard tungsten concentrate which tin content was controlled less than 0.3% (Lv and Mao, 2018; Hu et al., 2018). However, some associated ores such as ...
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Currently, the recovery of tungsten from scheelite concentrates involves the use of strong acids, alkalis, and/or high temperatures (roasting). Deep Eutectic Solvents (DES) are …
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The main tungsten mineral resources with economic value are wolframite [(Fe,Mn)WO 4] and scheelite (CaWO 4) (Liu et al., 2019; Chen et al., 2017). For a long time, China's tungsten concentrate output has accounted for more than 80% of the world's tungsten concentrate output (USGS, 2021). Alkali digestion is a conventional process …
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The wolframite concentrate was provided by Jiangxi Tungsten Group Co., Ltd., China, and contained WO 3 69.50%, Fe 11.12%, and Mn 6.56% as the main compositions as presented in Table 1. The X-ray diffraction (XRD) pattern of the concentrate (Fig. 1) showed that it was with high content of wolframite [(Fe,Mn)WO 4 …
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A commercial wolframite concentrate (particle size less than 0.075 mm) was used in the present study, and its dry composition is shown in Table 1. Analytical grades of sodium carbonate and silica were used for the decomposition of the wolframite. ... Direct recovery of tungsten in the form of sodium tungstate can be as high as 96%. However, …
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1. Introduction. Tungsten has been listed as one of the critical raw materials in China, Europe and the United States due to its high economic importance and the fact that its supply is at risk [3], [5], [6], [7].The Chinese government implements quotas for the production and processing of tungsten concentrate, with an annual output of 130,000 …
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The results of bench-scale flotation experiments showed that the WO3 recovery of wolframite concentrate with 180 g/t SHA was 10.05% higher than that with 360 g/t BHA and 300 g/t Pb(NO3)2.
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After multiple exploratory experiments, we have determined a process for the plant involving crushing, grinding, flotation, and three magnetic separation to recover tungsten …
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Aiming to explore a sustainable process for tungsten extraction from wolframite concentrate, the digestion behavior and mechanism of wolframite in HCl solution at …
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Tungsten is a kind of important strategic metal as it is widely used in many fields such as machinery manufacturing, chemical industry, aerospace industry and national defense industry [].With the continued exploitation of high-grade tungsten resource, the content of impurity elements in tungsten ores becomes higher and higher [2, 3].For …
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Recovery of wolframite from tungsten mine tailings by the combination of shaking table and flotation with a novel "crab" structure sebacoyl hydroxamic acid. ... Wolframite concentrate conversion …
DetailsWe report results of efficiency of tungsten extraction from a wolframite concentrate (containing 61.5 wt % WO 3) from the mine of Igarapé Manteiga (state of Rondônia, …
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An Integrated Process for the Recovery of Tungsten and Tin from a Combined WOLFRAMITE-SCHEELITE-CASSITERITE Concentrate
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About 95.93% of tungsten could be leached under optimum conditions. Studies on the recovery of tungsten from a composite barite–scheelite concentrate ore were conducted utilizing a soda–silicon roast-Na2 CO 3 solution leach technique. Scheelite and barite mainly compose this ore with a slight trace of other impure components.
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Fine and very fine scheelite and wolframite recovery. ... a bulk Bi-pyrite concentrate with grade 3.0% Bi at recovery 85.2% and a tungsten concentrate with grade 38.2% WO 3 at recovery 89.3% were achieved. For a scheelite ore containing Cu and Zn sulphides, pyrite and abundant pyrrhotite, the process of pre-flotation of Cu, …
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The results show that under the conditions that the ratio of water to ore is 0.8, stirring rate is 500 r min−1 and the heating time is 2.0 h at 160 C, the recovery of tungsten reaches 98% for ...
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The high recovery of tungsten from low manganese wolframite (about 98%) can be obtained in 1.5–4.0 ... Sun et al. [25] showed that more than 97.57% of the tungsten from wolframite concentrate (33.57 wt% WO 3) could be recovered by use of pressure leaching at 160 ...
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The tungsten concentrate after iron removal mainly consists of wolframite and vein minerals. Therefore, we employed strong magnetic separator once again for wolframite concentration to enhance the recovery of tungsten slimes. Through strong magnetic separation, we obtained a tungsten concentrate with a WO 3 grade of …
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