Modification of Powder Properties by Liquid Additives

  • Additives are applied to dry, fine powders to achieve a wide range of objectives, including the reduction of energy consumption, refinement of particle size distributions, enhancement of product throughput or dosing behavior. These modifications often result in improvements in flowability, a reduction in agglomeration tendency, decreased frictional resistance, and the development of anti-stick properties. While numerous individual studies have investigated various additives across diverse processes, many results remain fragmented, and a comprehensive understanding of the mechanisms underlying the actions of different additives is still lacking. Consequently, the selection of suitable additives continues to rely predominantly on empirical knowledge. In this work, the addition of liquid additives from various substance classes to powders was investigated in greater detail. In particular, the effects of additive incorporation on the behavior of powders during interactions with other materials were examined—whether during the admixing ofAdditives are applied to dry, fine powders to achieve a wide range of objectives, including the reduction of energy consumption, refinement of particle size distributions, enhancement of product throughput or dosing behavior. These modifications often result in improvements in flowability, a reduction in agglomeration tendency, decreased frictional resistance, and the development of anti-stick properties. While numerous individual studies have investigated various additives across diverse processes, many results remain fragmented, and a comprehensive understanding of the mechanisms underlying the actions of different additives is still lacking. Consequently, the selection of suitable additives continues to rely predominantly on empirical knowledge. In this work, the addition of liquid additives from various substance classes to powders was investigated in greater detail. In particular, the effects of additive incorporation on the behavior of powders during interactions with other materials were examined—whether during the admixing of additives in different mixing systems or upon contact with various surfaces in the fluidized state, using a specially developed experimental setup. While simple geometries and varying process parameters can be tested in the experimental rig, practical testing of the additive products was also conducted in more complex systems. Simultaneously, other properties—e.g., changes in surface energy, dusting propensity, or agglomerate strength—were also studied. The results obtained aim to broaden the understanding of the effects of specific additive classes on products from different perspectives, thereby increasing the transparency and soundness of the additive selection process for diverse future applications.show moreshow less

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Metadaten
Author:Sofiia Dibrova, Sandra Breitung-FaesORCiD
ISBN:978-3-18-990143-6
ISSN:0083-5560
Parent Title (English):BOOK OF ABSTRACTS
Publisher:VDI Verlag GmbH
Place of publication:Düsseldorf
Document Type:conference proceeding (article)
Language:English
Date of first Publication:2025/09/23
Release Date:2025/10/23
Pagenumber:179
Konferenzangabe:PARTEC 2025, International Congress on Particle Technology; September 23 - 25, 2025, Nuremberg, Germany
institutes:Fakultät Verfahrenstechnik
Research Themes:Materialien & Produktionstechnik
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