Wolframite concentrate conversion kinetics and mechanism …
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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Recovery of tungsten by liquid–liquid extraction from a …
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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Caustic decomposition of scheelite and scheelite-wolframite …
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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AN INTEGRATED PROCESS FOR THE RECOVERY OF TUNGSTEN …
This article presents results of the studies on development of viable process route for quantitative recovery of tungsten and tin values occurring together in the form of a multimineral concentrate of wolframite, scheelite, and cassiterite. The investigations were carried out using a tin–tungsten multimineral ore from Kyrgyzstan (Central Asia).
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A sustainable process for tungsten extraction from …
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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Sustainable and Efficient Recovery of Tungsten from Wolframite …
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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A sustainable process for tungsten extraction from …
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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Processing of Tungsten Preconcentrate from Low Grade Ore …
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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Wolframite Processing: Maximizing the Value of Tungsten …
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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Recovery of Tungsten by liquid-liquid Tungsten from …
We 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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Extraction of Tungsten from Wolframite Sample Using …
Extraction of tungsten from wolframite ore (Fe, Mn)WO4 was achieved using ammonium phosphate salt as flux. The supplied ore was predominantly composed of iron-rich endmember called ferberite (FeWO4) and other minor phases identified as quartz and elsmoreite. Fusion of the wolframite ore sample (ratio 1:25) yielded an unstable …
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Grade and recovery of scheelite, wolframite, and cassiterite …
Scheelite, wolframite, and cassiterite can be well collected in the roughing flotation with the recovery rate at 81.81%, 78.48%, and 68.86%. ... View in full-text. Context 3. ... synchronous ...
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Sustainable and efficient extracting of tin and tungsten from
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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A green process for arsenic removal and tungsten recovery from tungsten
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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A sustainable process for tungsten extraction from wolframite concentrate
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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(PDF) A Review of Tungsten Resources and Potential
WHIMS modeling on tungsten tailings predicted good wolframite recovery rates: approxi- mately 80% (90%) for new tailings and 65% (80%) for old tailings at 0.9 T (1.6 T) magnetic intensity [
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Sustainable and efficient extracting of tin and tungsten …
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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Leaching Behavior and Mechanism of Scheelite and Wolframite …
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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Materials Proceedings | Free Full-Text | Recovery of Tungsten …
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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A Fundamental Study on the Preparation of Sodium …
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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Wolframite concentrate conversion kinetics and mechanism …
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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Sustainable and efficient extracting of tin and tungsten …
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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Extracting tungsten from scheelite concentrate with …
The recovery of tungsten decreased to 93.8% at the lowest level of liquid/solid ratio of 0.6:1.0, ... Decomposing scheelite and scheelite–wolframite mixed concentrate by caustic soda digestion. J. Central South University of Technology, 10 (4) (2003), pp. 297-300.
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Froth Flotation of Tungsten Ore
For example, the high-intensity magnetic separator product grade is 6.9% WO3 and arsonic acid flotation gave a final concentrate grade of 50.94% WO3 with 95% recovery. Table 1 shows that flotation recovery is more effective in the size range of 60 to 0 µm. Advanced Flotation with Ramification-Carrier Flotation Process. Combined …
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An Integrated Process for the Recovery of Tungsten and Tin …
An Integrated Process for the Recovery of Tungsten and Tin from a Combined WOLFRAMITE-SCHEELITE-CASSITERITE Concentrate
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Extraction of Tungsten from Wolframite Sample Using …
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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Sustainable and Efficient Recovery of Tungsten from …
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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Decomposing scheelite and scheelite-wolframite mixed concentrate …
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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Optimization of tungsten leaching from low manganese wolframite …
In the present work, the pressure leaching of low-grade wolframite concentrate (33.61 wt% WO 3) with average particle size of 62 μm obtained from Chahpalang mine located in the Yazd province of Iran was studied. The Effects of temperature, time and Na 2 CO 3 /WO 3 weight ratio on tungsten leaching efficiency …
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AN INTEGRATED PROCESS FOR THE RECOVERY OF …
This article presents results of the studies on development of viable process route for quantitative recovery of tungsten and tin values occurring together in the form of a …
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