Georgia State University Research Foundation (USA)
Thiele Kaolin Company (USA)
Inventeur(s)
Elliott, W. Crawford
Gardner, Daniel Joseph
Riley, Ed
Malla, Prakash
Abrégé
Described herein are technologies for concentrating rare-earth elements from a heavy fraction of grit in gangue produced in kaolin mining. In some examples, grit is separated as a non-clay fraction of gangue produced in a kaolin mining operation. The grit is separated into a heavy mineral grit sub-fraction and a light mineral grit sub-fraction. Rare-earth elements, particularly heavy rare-earth elements, are thereafter extracted from the heavy mineral grit sub-fraction using various extraction technologies.
B03B 9/00 - Disposition générale d'un atelier de séparation, p.ex. schéma opératoire
B03B 5/30 - Lavage de matériaux en grains, en poudre ou en grumeaux; Séparation par voie humide en utilisant des plongeants et flottants avec emploi de liquides denses ou de suspensions
C22B 1/00 - Traitement préliminaire de minerais ou de débris ou déchets métalliques
C22B 59/00 - Obtention des métaux des terres rares
2.
Extracting rare-earth elements from a gangue heavy fraction
Georgia State University Research Foundation (USA)
Thiele Kaolin Company (USA)
Inventeur(s)
Elliott, W. Crawford
Gardner, Daniel Joseph
Malla, Prakash
Riley, Ed
Abrégé
Described herein are technologies for concentrating rare-earth elements from a heavy fraction of grit in gangue produced in kaolin mining. In some examples, grit is separated as a non-clay fraction of gangue produced in a kaolin mining operation. The grit is separated into a heavy mineral grit sub-fraction and a light mineral grit sub-fraction. Rare-earth elements, particularly heavy rare-earth elements, are thereafter extracted from the heavy mineral grit sub-fraction using various extraction technologies.
B03B 9/00 - Disposition générale d'un atelier de séparation, p.ex. schéma opératoire
C22B 59/00 - Obtention des métaux des terres rares
C22B 1/00 - Traitement préliminaire de minerais ou de débris ou déchets métalliques
B03B 5/30 - Lavage de matériaux en grains, en poudre ou en grumeaux; Séparation par voie humide en utilisant des plongeants et flottants avec emploi de liquides denses ou de suspensions
3.
Removal of stickies in the recycling of paper and paperboard
Removal of stickies from waste paper and paperboard is obtained with the use of a modified kaolin-based stickies removal composition. The modified kaolin-based stickies removal composition is produced by modifying the kaolin clay, separating the modified kaolin clay from the non-reactive kaolin clay, and then adding a nonionic surfactant to the modified kaolin-based particles. Removal of stickies is improved by the use of this modified kaolin-based stickies removal composition during the recycling of the waste paper and paperboard.
Removal of stickies from waste paper and paperboard is obtained with the use of a modified kaolin-based stickies removal composition. The modified kaolin-based stickies removal composition is produced by modifying the kaolin clay, separating the modified kaolin clay from the non-reactive kaolin clay, and then adding a nonionic surfactant to the modified kaolin-based particles. Removal of stickies is improved by the use of this modified kaolin-based stickies removal composition during the recycling of the waste paper and paperboard.
GEORGIA STATE UNIVERSITY RESEARCH FOUNDATION (USA)
THIELE KAOLIN COMPANY (USA)
Inventeur(s)
Elliott, W., Crawford
Gardner, Daniel, Joseph
Prakash, Malla
Riley, Ed
Abrégé
Described herein are technologies for concentrating rare-earth elements from a heavy fraction of grit in gangue produced in kaolin mining. In some examples, grit is separated as a non-clay fraction of gangue produced in a kaolin mining operation. The grit is separated into a heavy mineral grit sub-fraction and a light mineral grit sub-fraction. Rare-earth elements, particularly heavy rare-earth elements, are thereafter extracted from the heavy mineral grit sub-fraction using various extraction technologies.
Composite pigments are provided which comprise a mineral pigment (such as kaolin clay, titanium dioxide, talc, mica or a mixture of two or more of these mineral pigments) and calcium carbonate precipitated in-situ on the surfaces of the particles of the mineral pigment.
Composite pigments are provided which comprise a mineral pigment (such as kaolin clay, titanium dioxide, talc, mica or a mixture of two or more of these mineral pigments) and calcium carbonate precipitated in-situ on the surfaces of the particles of the mineral pigment.
Fluffy powders, such as calcined kaolin clays or air floated clays, can be compacted using a process which comprises applying increasing amounts of pressure to a powder moving through a confinement area. The compacted product has an improved bulk density and improved wet out and slurry incorporation times as compared to the non-compacted starting material feed.
Deinking of waste paper is obtained with the use of a hydrophobic kaolin-based deinking composition. The hydrophobic kaolin-based deinking composition is produced by hydrophobizing the kaolin clay and then blending the hydrophobic kaolin-based particles with a deinking surfactant. Separation and removal of ink is achieved either by washing deinking, flotation deinking or combination of these methods.
D21B 1/08 - Matières premières fibreuses ou leur traitement mécanique par division des matières premières en petites particules, p.ex. fibres par procédés à sec les matières premières étant des chiffons
Mineral pigments (such as kaolin clay) having a high surface area and particle size in the nano scale range are provided which are useful in paper coating and filling, ink jet coating formulations, paint compositions, and as a filler in rubbers, plastics and polymers. These pigments are manufactured by intensive wet milling of a mineral composition which may have undergone prior dry grinding and then optionally subjecting the wet milled mineral composition to an acid treatment.
C09C 3/04 - Traitement physique, p.ex. broyage, traitement par des vibrations ultrasoniques
C09C 3/06 - Traitement par des composés inorganiques
B82B 3/00 - Fabrication ou traitement des nanostructures par manipulation d’atomes ou de molécules, ou d’ensembles limités d’atomes ou de molécules un à un comme des unités individuelles
Mineral pigments (such as kaolin clay) having a high surface area and particle size in the nano scale range are provided which are useful in paper coating and filling, ink jet coating formulations, paint compositions, and as a filler in rubbers, plastics and polymers. These pigments are manufactured by intensive wet milling of a mineral composition which may have undergone prior dry grinding and then optionally subjecting the wet milled mineral composition to an acid treatment.
Fluffy powders, such as calcined kaolin clays or air floated clays, can be compacted using a process which comprises applying increasing amounts of pressure to a powder moving through a confinement area. The compacted product has an improved bulk density and improved wet out and slurry incorporation times as compared to the non-compacted starting material feed.
Fluffy powders, such as calcined kaolin clays or air floated clays, can be compacted using a process which comprises applying increasing amounts of pressure to a powder moving through a confinement area. The compacted product has an improved bulk density and improved wet out and slurry incorporation times as compared to the non-compacted starting material feed.
D21B 1/08 - Matières premières fibreuses ou leur traitement mécanique par division des matières premières en petites particules, p.ex. fibres par procédés à sec les matières premières étant des chiffons
