Results 11 to 20 of about 1,478 (213)

Wolframite Conversion in Treating a Mixed Wolframite–Scheelite Concentrate by Sulfuric Acid [PDF]

JOM, 2017
Complete wolframite conversion in sulfuric acid is significant for expanding the applicability of the sulfuric acid method for producing ammonium paratungstate. In this paper, the conversion of wolframite in treating a mixed wolframite–scheelite concentrate by sulfuric acid was studied systematically.
Leiting Shen, Xiaobin Li, Qiusheng Zhou, Zhihong Peng, Guihua Liu, Tiangui Qi, Pekka Taskinen   +6 more
openaire   +3 more sources

Influence of Microbubble on Fine Wolframite Flotation [PDF]

Minerals, 2021
The recovery of fine wolframite is low when using traditional flotation that does not use a microbubble. In this study, a microbubble was introduced into the fine wolframite flotation system; −20 μm wolframite was used as an experiment sample and octyl hydroxamic acid as the collector.
Penggang Wei, Liuyi Ren, Yimin Zhang, Shenxu Bao   +3 more
openaire   +2 more sources

Triplite and wolframite from a greisen-bordered veinlet in Eurajoki, SW Finland [PDF]

Bulletin of the Geological Society of Finland, 1969
Triplite and wolframite are described from a greisen-bordered veinlet associated with the local varieties of the Laitila rapakivi granite massif. The chemical analysis, unit cell dimensions and specific gravity are given for these minerals, and in ...
I. Haapala, P. Ojanperä
doaj   +2 more sources

Natural Wolframite Used as Cathode Photocatalyst for Improving the Performance of Microbial Fuel Cells

Applied Sciences, 2018
Developing simple and cheap electrocatalysts or photocatalysts for cathodes to increase the oxygen reduction process is a key factor for better utilization of microbial fuel cells (MFCs).
Junxian Shi, Anhuai Lu, Haibin Chu, Hongyu Wu, Hongrui Ding   +4 more
doaj   +2 more sources

A Fundamental Study on the Preparation of Sodium Tungstate from Wolframite via the Smelting Process

Metals
Tungsten is a high-value resource with a wide range of applications. The tungsten metal is produced via ammonium paratungstate, which is a multi-stage process including leaching, conversion, precipitation, calcination, and reduction.
Liqiang Xu, Baojun Zhao
doaj   +2 more sources

Thermal expansion of FeWO₄ (ferberite) and FeWO₄:Fe₂WO₆ (7:1): a comparative X-ray and neutron diffraction study. [PDF]

J Appl Crystallogr
Temperature‐dependent single‐crystal X‐ray, powder X‐ray and neutron diffraction measurements reveal the thermal expansion behavior of FeWO4 from 2 to 1123 K. Significant differences between natural ferberite and a FeWO4:Fe2WO6 composite highlight the influence of multiphase and microstructural effects on derived thermoelastic parameters.The thermal ...
Fabelo O, Cañadillas-Delgado L, Vie D, Matesanz E, Gonzalez-Platas J, Errandonea D.   +5 more
europepmc   +2 more sources

Thermodynamic activity of WO3 in wolframite

Bulletin of the South Ural State University. Series ‘Metallurgy’, 2015
Пашкеев Игорь Юльевич, канд. техн. наук, доцент кафедры физической химии, Южно-Уральский государственный университет, г. Челябинск; pashkeevii@susu.ac.ru.
M.V. Sudarikov, P.A. Tarasov
openaire   +3 more sources

High-Pressure Properties of Wolframite-Type ScNbO4 [PDF]

, 2022
In this work, we used Raman spectroscopic and optical absorption measurements and first-principles calculations to unravel the properties of wolframite-type ScNbO4 at ambient pressure and under high pressure.
Ouahrani, Tarik, Badawi, Michael, Muñoz, Alfonso, Errandonea Ponce, Daniel, Rodríguez Hernández, Plácida, Rao, Rekha, Garg, Alka B.   +6 more
core   +2 more sources

Enhancing Bidirectional Sulfur Conversion Through p-d Orbital Hybridization via Vacancy Engineering. [PDF]

Exploration (Beijing)
To effectively alleviate the severe shuttle effect and delayed redox kinetics of lithium–sulfur batteries, CoWO4−x/CNT composites with different oxygen vacancy concentrations were prepared. The p–d orbital hybridization caused by oxygen vacancy enhances the bidirectional sulfur conversion, and provides valuable insights for the development of highly ...
Chen Y, Li D, Chen Y, Wu X, Chen M, Du Y, Fu K, Yuan H, Wei S, Wang X, Shu H.   +10 more
europepmc   +2 more sources

An Electrocatalytic/Heterogeneous Catalytic Cascade for Selective Production of Propylene Oxide via Anodic H₂O₂ Generation. [PDF]

Angew Chem Int Ed Engl
This work demonstrates a cascade strategy for the selective synthesis of propylene oxide (PO) by coupling anodic H2O2 generation with TS‐1 catalyzed propylene epoxidation. By immobilizing TS‐1 on a gas diffusion layer, the system achieves high PO productivity with efficient H2O2 utilization, providing a safer and greener alternative to conventional PO ...
Chandra S, Shekhawat A, Koul A, Zerdoumi R, Li L, Schuhmann W.   +5 more
europepmc   +2 more sources