TY  - CONF
A1  - Dibrova, Sofiia
A1  - Appoldt, Leon
A1  - Breitung-Faes, Sandra
T1  - Influence of additives on classification and transportation efficiency in fine powder handling
T2  - BOOK OF ABSTRACTS
N2  - In this study, the effect of additives on very fine limestone powder was investigated for a fine limestone powder with regard to construction and pharmaceutical applications. Three different additives were considered in an attempt to reduce the tendency towards agglomeration and caking, which are occuring effect, reducing process efficiency and stability. The selection of these additives was based on their performance in previous studies on the limestone and lactose material systems during dry grinding [1] – [3]. Instead of grinding especially separation and transport processes were taken into account. To test the efficiency of the additives used, the sieving capacity of the powders, the separation behavior in a zig-zag air classifier as well as the flow behavior in a vibratory feeder were tested. Here, only the results of the sieve analysis for the additive heptanoic acid are described since heptanoic acid showed the most significant effect compared to the other additives. Additionally, the results of the dynamic image analysis, laser diffraction spectroscopy and the flowability measurements are provided and will be discussed.

[1] P. Prziwara, S. Breitung-Faes, und A. Kwade, „Impact of grinding aids on dry grinding performance, bulk properties and surface energy“, Advanced Powder Technology, Bd. 29, Nr. 2, S. 416–425, Feb. 2018, doi: 10.1016/j.apt.2017.11.029.
[2] L. Miethke, P. Prziwara, J. H. Finke, und S. Breitung-Faes, „Opposing Effects of Additives in Dry Milling and Tableting of Organic Particles“, Pharmaceutics, Bd. 13, Nr. 9, S. 1434, Sep. 2021, doi: 10.3390/pharmaceutics13091434.
[3] P. Prziwara, L. D. Hamilton, S. Breitung-Faes, und A. Kwade, „Evaluation of the capturing of dry fine particles between grinding media by drop-weight tests“, Powder Technology, Bd. 363, S. 326–336, März 2020, doi: 10.1016/j.powtec.2020.01.012.
Y1  - 2023
UR  - https://opus4.kobv.de/opus4-ohm/frontdoor/index/index/docId/4274
UR  - https://nbn-resolving.org/urn:nbn:de:bvb:92-opus4-42745
SN  - 978-3-18-990139-9
SN  - 0083-5560
PB  - VDI Verlag GmbH
CY  - Düsseldorf
ER  -