References of "Aatach, Mohamed"
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See detailProcess Oriented Characterisation of Copper Slag Processed by Flotation in View Metals Recovery
Aatach, Mohamed ULiege; Milen, Kadiyski; Stoilov, Viktor et al

in Proceedings of the 7th International Slag Valorisation Symposium: Shifting Gears to a Climate-neutral & Resource Efficient Society (in press)

Profound process oriented characterisation on samples collected during plant survey of the slag flotation plant belonging to Aurubis AD, Bulgaria has been realized in order to evaluate the form under ... [more ▼]

Profound process oriented characterisation on samples collected during plant survey of the slag flotation plant belonging to Aurubis AD, Bulgaria has been realized in order to evaluate the form under which Cu, Ni, Mo and Co bearing phases occurred and likewise their mineralogical composition. The slag subjected to flotation consisted in majority of fayalite, magnetite-iron oxides and a glass-resembling phase. Ni and Mo have been found to be closely associated to iron-bearing phases. The flotation tailings sample has been subjected to sulphation roasting followed by water leaching as a hydrometallurgical route to recover the remaining Cu, Mo, Ni and Co. Based on the various sulphation roasting process conditions (acid dosage, duration, temperature), copper, nickel and cobalt were brought in solution to a different extent. Sulphation roasting performed at 350 °C has secured the best extraction degree for Mo and Co, while maximum recovery of Ni and Cu has been documented when roasting was done at 150 °C and 450 °C respectively. EDS-SEM observations of various products do support the experimental findings. [less ▲]

Detailed reference viewed: 67 (13 ULiège)
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See detailCharacterisation and recovery of non-ferrous metals met in a copper-slag processed by flotation
Aatach, Mohamed ULiege; Kadiyski, Milen; Stoilov, Viktor et al

in XXX International Mineral Processing Congress, IMPC 2020 (2021)

Detailed process oriented characterisation on representative samples from plant survey of the slag flotation plant belonging to Aurubis, Bulgaria has been realised in order to evaluate the mineralogical ... [more ▼]

Detailed process oriented characterisation on representative samples from plant survey of the slag flotation plant belonging to Aurubis, Bulgaria has been realised in order to evaluate the mineralogical occurrences of Cu, Ni, Mo and Co bearing phases. The slag subjected to flotation consisted in majority of fayalite, magnetite-iron oxides and a glass-like phase. Ni and Mo have been found to be closely associated to magnetite and fayalite. The tailing from the slag flotation has been subjected to sulphation roasting followed by water leaching as a hydrometallurgical means to recover the remaining Cu, Mo, Ni and Co. Based on the various sulphation roasting conditions (acid dosage, duration, temperature) copper, nickel and cobalt were brought to solution to a different extent. Molybdenum was the most difficult to be rendered soluble due to its close association with iron, suspected to form an insoluble compound with it. Sulphation roasting performed at 350ºC has secured the best extraction degree for Cu, Mo and Co, while maximum recovery of Ni has been documented when roasting was done at 150°C. [less ▲]

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Peer Reviewed
See detailCharacterisation and recovery of non-ferrous metals met in a copper-slag processed by flotation
Aatach, Mohamed ULiege; Kadiyski, Milen; Stoilov, Viktor et al

in Proceedings of the XXX International Mineral Processing Congress (2020, October)

Detailed process oriented characterisation on representative samples from plant survey of the slag flotation plant belonging to Aurubis, Bulgaria has been realized in order to evaluate the mineralogical ... [more ▼]

Detailed process oriented characterisation on representative samples from plant survey of the slag flotation plant belonging to Aurubis, Bulgaria has been realized in order to evaluate the mineralogical occurrences of Cu, Ni, Mo and Co bearing phases. The slag subjected to flotation consisted in majority of fayalite, magnetite-iron oxides and a glass-like phase. Ni and Mo have been found to be closely associated to magnetite and fayalite. The tailing from the slag flotation has been subjected to sulphation roasting followed by water leaching as a hydrometallurgical means to recover the remaining Cu, Mo, Ni and Co. Based on the various sulphation roasting conditions (acid dosage, duration, temperature) copper, nickel and cobalt were brought to solution to a different extent. Molybdenum was the most difficult to be rendered soluble due to its close association with iron, suspected to form an insoluble compound with it. Sulphation roasting performed at 350ºC has secured the best extraction degree for Cu, Mo and Co, while maximum recovery of Ni has been documented when roasting was done at 150°C. [less ▲]

Detailed reference viewed: 30 (4 ULiège)
Full Text
Peer Reviewed
See detailCharacterisation and recovery of non-ferrous metals met in a copper-slag processed by flotation
Aatach, Mohamed ULiege; Kadiyski, Milen; Stoilov, Viktor et al

in Proceedings of the XXX International Mineral Processing Congress (2020, October)

Detailed process oriented characterisation on representative samples from plant survey of the slag flotation plant belonging to Aurubis, Bulgaria has been realized in order to evaluate the mineralogical ... [more ▼]

Detailed process oriented characterisation on representative samples from plant survey of the slag flotation plant belonging to Aurubis, Bulgaria has been realized in order to evaluate the mineralogical occurrences of Cu, Ni, Mo and Co bearing phases. The slag subjected to flotation consisted in majority of fayalite, magnetite-iron oxides and a glass-like phase. Ni and Mo have been found to be closely associated to magnetite and fayalite. The tailing from the slag flotation has been subjected to sulphation roasting followed by water leaching as a hydrometallurgical means to recover the remaining Cu, Mo, Ni and Co. Based on the various sulphation roasting conditions (acid dosage, duration, temperature) copper, nickel and cobalt were brought to solution to a different extent. Molybdenum was the most difficult to be rendered soluble due to its close association with iron, suspected to form an insoluble compound with it. Sulphation roasting performed at 350ºC has secured the best extraction degree for Cu, Mo and Co, while maximum recovery of Ni has been documented when roasting was done at 150°C. [less ▲]

Detailed reference viewed: 30 (4 ULiège)
See detailEtude de la réduction du volume de la purge par évaporation (Procédé BioLix)
Aatach, Mohamed ULiege; Lambert, Fanny ULiege; Bastin, David ULiege

Report (2019)

The BioLix process implies periodic bleeding of recycled solutions to avoid the effect of concentration of dissolved elements and to counterbalance the input of washing water into the circuit. These bleed ... [more ▼]

The BioLix process implies periodic bleeding of recycled solutions to avoid the effect of concentration of dissolved elements and to counterbalance the input of washing water into the circuit. These bleed contain metal sulphates of copper, zinc, aluminum, sodium and iron. They require special attention before disposal to comply with environmental standards in force. In this context, it is necessary to extract the sulphates associated with sodium present in the bleed prior their release. Selective crystallization would allow the recycling of these compounds for the BioLix process. In addition, a reduction by evaporation in the volumes of the bleed could allow a reduction in logistics costs. Therefore, the objectives pursued for the study set out in this report are the following: - To determine the activation conditions of the crystallization of sodium sulfate; - To determine the maximum reduction rate of the bleed volume and check the stability of the reduced solutions depending on the storage / transport temperature. [less ▲]

Detailed reference viewed: 36 (5 ULiège)
See detailEtude de la percolation du résidu fin en vue de sa mise en CET (Procédé BioLix)
Aatach, Mohamed ULiege; Bastin, David ULiege; Lambert, Fanny ULiege

Report (2019)

The BioLix process produces a final fine residue which must be landfilled in accordance with the current standards. At the end of the treatment, potentially mobilizable copper may still be present in the ... [more ▼]

The BioLix process produces a final fine residue which must be landfilled in accordance with the current standards. At the end of the treatment, potentially mobilizable copper may still be present in the fine fraction. However, landfilling in class II technical landfill centers (non-hazardous industrial waste) is only authorized if the copper contained in the produced percolate does not exceed 50 mg per kg of dry matter. In an attempt to meet this condition, various solid / liquid separation methods applied to a pulp of the BioLix type have been considered. More specifically, a study of the percolation of the fine residues obtained was carried out. [less ▲]

Detailed reference viewed: 28 (2 ULiège)
See detailEtude de la neutralisation de la purge par addition de Ca(OH)2 (Procédé BioLix)
Aatach, Mohamed ULiege; Lambert, Fanny ULiege; Bastin, David ULiege

Report (2019)

The BioLix process implies periodic bleeding of recycled solutions to avoid the effect of concentration of dissolved elements and to counterbalance the input of washing water into the circuit. These bleed ... [more ▼]

The BioLix process implies periodic bleeding of recycled solutions to avoid the effect of concentration of dissolved elements and to counterbalance the input of washing water into the circuit. These bleed contain metal sulphates of copper, zinc, aluminum, sodium and iron. The neutralisation by Ca(OH)2 addition to the bleed has been investigated as a way of complying environmental standards in force regarding the disposal of a liquid effluent. [less ▲]

Detailed reference viewed: 30 (3 ULiège)
See detailInfluence de l’ensemencement sur la précipitation du fer et de l’aluminium (Procédé BioLix)
Aatach, Mohamed ULiege; Lambert, Fanny ULiege; Bastin, David ULiege

Report (2018)

This report presents the results and discussions related to pressure oxidation leaching experiments on shredded polymetallic materials (BioLix process) with the aim to evaluate the influence of a seeding ... [more ▼]

This report presents the results and discussions related to pressure oxidation leaching experiments on shredded polymetallic materials (BioLix process) with the aim to evaluate the influence of a seeding on the precipitation of aluminium and iron. [less ▲]

Detailed reference viewed: 32 (3 ULiège)
See detailEffet de la dilution et de l'acidification de la solution de lixiviation sur la génération d'un précipité (Procédé BioLix)
Aatach, Mohamed ULiege; Lambert, Fanny ULiege; Bastin, David ULiege

Report (2018)

This reports presents the results and discussions on the stability of the pregnant leach solution produced through a pressure oxidation leaching (PLS) of polymetallic materials (BioLix Process). The ... [more ▼]

This reports presents the results and discussions on the stability of the pregnant leach solution produced through a pressure oxidation leaching (PLS) of polymetallic materials (BioLix Process). The effects of the dilution and the acidification of the PLS were investigated. [less ▲]

Detailed reference viewed: 24 (3 ULiège)
See detailEtude de l’agitation des réacteurs de lixiviation – détermination de la vitesse terminale de chute d’une particule type (Procédé BioLix)
Aatach, Mohamed ULiege; Lambert, Fanny ULiege; Bastin, David ULiege

Report (2018)

This report is on the determination of the terminal falling velocity of a particule similar to the one treated by the BioLix process both from a theoretical and experimental point of view.

Detailed reference viewed: 32 (8 ULiège)
See detailEpuration des chlorures présents dans les effluents liquides d'un procédé de lixiviation oxydante sous pression de matières polymétalliques
Aatach, Mohamed ULiege; Lambert, Fanny ULiege; Bastin, David ULiege

Report (2018)

This report presents the results and discussions of an investigation on the chloride purification of the liquid effluents produced by the BioLix Process.

Detailed reference viewed: 25 (3 ULiège)
See detailImpurities transfert during the pressure oxidation leaching of polymetallic materials through the BioLix Process
Aatach, Mohamed ULiege; Damm Martin, Gonzalo; Lambert, Fanny ULiege et al

Report (2018)

This report focuses on the transfer of impurities in the pregnant leach solution during the pressure oxidation leaching of polymetallic materials through the BioLix Process (identification, quantification ... [more ▼]

This report focuses on the transfer of impurities in the pregnant leach solution during the pressure oxidation leaching of polymetallic materials through the BioLix Process (identification, quantification, effects of the operating conditions). [less ▲]

Detailed reference viewed: 25 (2 ULiège)
See detailSpéciation de l'or en lixiviation oxydante sous pression de cartes électroniques (Procédé BioLix)
Aatach, Mohamed ULiege; Bastin, David ULiege; Lambert, Fanny ULiege

Report (2018)

This report focuses on the gold speciation related to the printed circuit boards processed by pressure oxidation leaching (BioLix Process).

Detailed reference viewed: 30 (2 ULiège)
See detailSur l'usage des ultrasons et des micro-ondes appliqués aux traitements chimiques
Aatach, Mohamed ULiege; Lambert, Fanny ULiege; Bastin, David ULiege

Report (2017)

This report offers an overview on the ultrasound and microwaves technologies applied to chemical processing (Setup characterization, chemical and physical effects, measurements, etc.).

Detailed reference viewed: 25 (4 ULiège)
See detailCémentation assistée par ultrasons - étude de faisabilité
Aatach, Mohamed ULiege; Bastin, David ULiege; Lambert, Fanny ULiege

Report (2017)

This report presents the results of a feasibility study on the use of ultrasound to alter metal cementation rate using a custom ultrasound setup.

Detailed reference viewed: 24 (6 ULiège)
See detailCaractérisation de panneaux LEDs
Aatach, Mohamed ULiege; Lambert, Fanny ULiege; Bastin, David ULiege

Report (2017)

The NOVA process was specifically developed to pre-treat low-grade Printed Circuit Board (PCB) concentrates. It generates three specific concentrates where the valuables metals are distributed as ... [more ▼]

The NOVA process was specifically developed to pre-treat low-grade Printed Circuit Board (PCB) concentrates. It generates three specific concentrates where the valuables metals are distributed as: - Precious metals (MP) in an electronic components concentrate (Cu and MP concentrate); - Cu in a pure Cu concentrate (i.e. with low leachable metals content) = depopulated PCB; - Sn in a Sn and MP concentrate. The objective of performing such metals separation is double: 1) It enables the recovery of Sn that is currently not valorised by the industrial smelting route; 2) It enables to concentrate the MP in specific outputs allowing a better economical valorisation. The heart of NOVA is the combination of mechanical activation and electrochemistry. The technology has been validated on post-shredding PCB coming from Waste Electrical and Electronic Equipment (WEEE) and End-of-Life (EOL) vehicles provided by Comet Traitements. During this validation at pilot scale, PM concentration factors of 5 and 15, respectively for Ag and Au, were observed. Note that the PM concentration factors are depending on EoL PCB characteristics (PCB design, WEEE category, step of the recycling process which PCB were sampled). The Nova process is currently running at pilot scale TRL7 (15kg/day, upscaling possible). [less ▲]

Detailed reference viewed: 30 (8 ULiège)
See detailUtilisation des ultrasons en hydrométallurgie
Aatach, Mohamed ULiege; Lambert, Fanny ULiege; Bastin, David ULiege

Report (2017)

Literature review on the application of ultrasound in hydrometallurgy.

Detailed reference viewed: 17 (4 ULiège)
See detailIntegration of Composites for Greener Engine - Rapport scientifique & technique
Aatach, Mohamed ULiege; Gaydardzhiev, Stoyan ULiege

Report (2016)

The project's objective is to achieve a greater integration of composite materials in the low-pressure compressor, major product of Techspace Aero. The recycling of composite materials is one of the main ... [more ▼]

The project's objective is to achieve a greater integration of composite materials in the low-pressure compressor, major product of Techspace Aero. The recycling of composite materials is one of the main parts of this project. The focus is on the review of technologies, reuse and resulting properties on the recycling of fibre reinforced polymers and the development of new processes for end-of-life aerospace grade advanced carbon fiber reinforced composite materials (electrodynamic and conventional fragmentation, physicochemical characterization, environmental impact assessment, etc.) [less ▲]

Detailed reference viewed: 152 (22 ULiège)
See detailIntegration of Composites for Greener Engine - Rapport scientifique & technique
Aatach, Mohamed ULiege; Gaydardzhiev, Stoyan ULiege

Report (2016)

The project's objective is to achieve a greater integration of composite materials in the low-pressure compressor, major product of Techspace Aero. The recycling of composite materials is one of the main ... [more ▼]

The project's objective is to achieve a greater integration of composite materials in the low-pressure compressor, major product of Techspace Aero. The recycling of composite materials is one of the main parts of this project. The focus is on the review of technologies, reuse and resulting properties on the recycling of fibre reinforced polymers and the development of new processes for end-of-life aerospace grade advanced carbon fiber reinforced composite materials (electrodynamic and conventional fragmentation, physicochemical characterization, environmental impact assessment, etc.) [less ▲]

Detailed reference viewed: 74 (18 ULiège)
See detailIntegration of Composites for Greener Engine - Rapport scientifique & technique
Aatach, Mohamed ULiege; Gaydardzhiev, Stoyan ULiege

Report (2015)

The project's objective is to achieve a greater integration of composite materials in the low-pressure compressor, major product of Techspace Aero. The recycling of composite materials is one of the main ... [more ▼]

The project's objective is to achieve a greater integration of composite materials in the low-pressure compressor, major product of Techspace Aero. The recycling of composite materials is one of the main parts of this project. The focus is on the review of technologies, reuse and resulting properties on the recycling of fibre reinforced polymers and the development of new processes for end-of-life aerospace grade advanced carbon fiber reinforced composite materials (electrodynamic and conventional fragmentation, physicochemical characterization, environmental impact assessment, etc.) [less ▲]

Detailed reference viewed: 45 (7 ULiège)