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13 results on '"Benarioua, Younes"'

7. Etude de la récupération du zinc des résidus de lixiviation Recuperation study of zinc from leaching residues

Author

Benarioua Younes

Subjects
Engineering (General). Civil engineering (General), TA1-2040
Abstract

La présente étude a été menée dans le but de valoriser le zinc des résidus de lixiviation. Pour ce but, nous avons retenu la méthode goethite qui présente certains avantages. La concentration d'acide sulfurique, la température et le temps de traitement ceux sont les paramètres choisis lors de ce travail. L'effet de trois paramètres sélectionnés sur la dissolution du zinc des résidus de lixiviation a été étudié. Il est démontré que la teneur en zinc augmente avec l'augmentation des valeurs paramétriques. The present work has been conducted in the objective of valorising the zinc from leaching residues. For this purpose we have retained the goethite method which presented some advantages. The sulfuric acid concentration, temperature and time of treatment are those parameters chosen for this study. The effect of three selected parameters on dissolution of zinc from leaching residues was investigated. It is shown that when values parametric increases the content of zinc increase.

Published
2013
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8. Effect of the annealing temperature and the thickness of carburizing layer on the obtained chromium carbides

Author

BOUBAAYA, Rabah, BENARIOUA, Younes, and ALLAOUI, Omar

Subjects
Diffusion Precipitation, technology, industry, and agriculture
Abstract

Low carbon steel substrates were surfacehardened by carburizing in solid medium, and then thin layers of chromium weredeposited by electrolytic way. After chromium deposition, the samples wereexposed to isothermal annealing at temperatures between 500 and 1100 °C for 1and 2 hours duration. The obtained thin layers were characterized by X-raysdiffraction, optical microscopy and Vickers micro-hardness.The obtained results showed that chromium layersare transformed into chromium carbide by metastable phases of transition. At500 °C annealing temperature thin films retain their monophasic character Crα,and they almost keep the same hardness values. When temperature range isbetween 700 and 900 °C the incipient phase appears and is increased while thechromium mother phases decrease. After annealing at 1100 °C, the chromium layeris completely converted into chromium carbides that would be responsible forthe increase of the hardness and adhesion layer / substrate.

Published
2017

12. TREATMENT OF LEACHING RESIDUES FROM ZINC BY GOETHITE PROCESS.

Author

BENARIOUA, YOUNES

Subjects
LEACHING, GOETHITE, HYDROXIDE minerals, SULFURIC acid, IRON
Abstract

This work is to study the recovery of zinc from leaching residues zinc. Among the several process used for the dissolution of zinc belongs to the residues, we have retained the goethite method which presented some advantages. The sulfuric acid concentration, temperature and time of heating residues are those parameters. These last factors can be optimized in this study. [ABSTRACT FROM AUTHOR]

Published
2013

13. HARDNESS OF DIAMOND FILMS DEPOSITED ON WC-CO: APPLICATION OF MONOLAYERS MODELS.

Author

BENARIOUA, YOUNES, LESAGE, JACKY, and CHICOT, DIDIER

Subjects
THIN film research, WEAR resistance, MECHANICAL wear, INDENTATION (Materials science), DEFORMATIONS (Mechanics), HARDNESS
Abstract

Diamond coatings present extremely high hardness, good wear resistance and chemical inertness. Because of these excellent technological properties, diamond films are of interest for a large variety of applications. This study is to determine the absolute hardness of the diamond films. A series of classical Vickers indentation at several loads were applied at the surface of the specimen. The determination of the hardness of a thin diamond films necessitates the use of models for separating the influence of the substrate into the measurement. [ABSTRACT FROM AUTHOR]

Published
2013

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