Comparative study of alkali roasting and leaching of chromite ores and titaniferous minerals

Autor: L. Escudero-Castejon, Sergio Sanchez-Segado, Animesh Jha, S. Parirenyatwa, Yotamu Stephen Rainford Hara

Publikováno v: Hydrometallurgy. 165:213-226

Extraction of titanium and chromium oxides may be achieved via roasting the respective minerals with alkali at high temperatures, followed by water and organic acid leaching. In this study, sodium and potassium hydroxides are used as alkali for roast

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1e9585ab1e4e9f88051067753fdee4d4
https://doi.org/10.1016/j.hydromet.2015.08.002

A Cr6+-Free Extraction of Chromium Oxide from Chromite Ores Using Carbothermic Reduction in the Presence of Alkali

Autor: L. Escudero-Castejon, S. Parirenyatwa, Animesh Jha, Yotamu Stephen Rainford Hara, Sergio Sanchez-Segado

Publikováno v: The Minerals, Metals & Materials Series ISBN: 9783319510903

Oxidative alkali roasting of chromite is the state-of-the-art process for manufacturing chromium-containing chemicals, which involves dealing with serious environmental problems arising from handling Cr6+-containing wastes generated in this process.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d0c1986bcca13e259e042ff44dcd41a9
https://doi.org/10.1007/978-3-319-51091-0_16

Thermal Decomposition of the Froth Flotation Mineral Sulfide Concentrates Under Argon Atmosphere in the Presence and Absence of Carbon

Autor: Yotamu Stephen Rainford Hara

Publikováno v: Mineral Processing and Extractive Metallurgy Review. 36:26-38

Thermal decomposition of the mineral sulfide concentrates derived from froth flotation was studied in the temperature range between 1073 K and 1473 K. The experiments were carried out by heating the mineral sulfide concentrates under inert (argon) at

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::efbafaa2c7fc7ecf10e74e00afae4191
https://doi.org/10.1080/08827508.2013.867853

Investigation of Molten Salt Phase Formation during Alkali Roasting of Titaniferous Minerals with Sodium and Potassium Hydroxide

Autor: Sergio Sanchez-Segado, S. Parirenyatwa, L. Escudero-Castejon, Animesh Jha, Yotamu Stephen Rainford Hara

Publikováno v: Scopus-Elsevier
Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts 2016 ISBN: 9783319486253
Advances in Molten Slags, Fluxes, and Salts: Proceedings of the 10th International Conference on Molten Slags, Fluxes and Salts

The benefit of alkali roasting over existing processes is that it minimises waste and energy consumption compared with the current methods for the beneficiation of titaniferous minerals. Previous studies on the liquid phase formation during alkali ro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ce17700cf83a7ab8f08bc74990b2d89

Carbothermic reduction of Zambian sulphide concentrates in presence of lime

Autor: Yotamu Stephen Rainford Hara, Animesh Jha

Publikováno v: Mineral Processing and Extractive Metallurgy. 122:146-156

The investigation focuses on an alternative route to metallic phase extraction from complex Zambian copper–cobalt sulphide mineral concentrates, derived from the Copperbelt region. In the context of developing a novel process route for metal extrac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6b0271519897b2615ff2739088a8e70c
https://doi.org/10.1179/1743285513y.0000000041