WAX
发表于 2025-3-25 05:51:13
Production of Tungsten by Pulse Current Reduction of CaWO4t electrochemical production of tungsten from CaWO. (scheelite) which is estimated as the seventy percent of the all tungsten reserves of the world. This paper investigates the application of pulse current in the electrochemical reduction of CaWO. pellets attached to a current collector. The electro
stress-test
发表于 2025-3-25 08:22:19
Kinetics of Extracting Vanadium from Stonecoal by Alkali Leaching ratio, the grinding fineness of stone coal, and stirring speed on the vanadium leaching rate was studied. The kinetics analysis for the process is presented by the shrinking core model. The results show that the vanadium leaching ratio of roasted stone coal can be beyond 75% at the 6% NaOH addition
小木槌
发表于 2025-3-25 12:12:56
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琐碎
发表于 2025-3-25 19:17:19
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Obsessed
发表于 2025-3-25 20:23:59
Adsorptive Recovery of Palladium and Platinum from Acidic Chloride Media Using Chemically Modified Ption capacities for gold(III), palladium(II) and platinum(IV) were evaluated as 3.30, 1.67 and 1.00 mol/kg, respectively. Those for palladium(II) and platinum(IV) are higher than those of simple quaternary ammonium chloride type of chemically modified persimmon tannin gel and commercially available anion exchange resin.
Deadpan
发表于 2025-3-26 01:23:38
Production of Tungsten by Pulse Current Reduction of CaWO4ith dilute hydrochloric acid solutions and characterized by X-ray diffraction and scanning electron microscopy. Examination of the results revealed that metallic tungsten was obtained by pulse current reduction.
debase
发表于 2025-3-26 06:59:53
Hydrometallurgical Extraction of Rare Earth Elements from Low Grade Mine Tailingsmove the unwanted Ca as Ca(NO.).. Analysis of the leach liquor reveals extraction ratios of between 75% and 100% for the heavy REE (e.g. Y, Eu, Dy, …) and below 40% from the light REEs (i.e. Ce, La). Full phosphorous extraction was also achieved.
魔鬼在游行
发表于 2025-3-26 10:05:20
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和平
发表于 2025-3-26 13:15:11
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Pelago
发表于 2025-3-26 19:51:01
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