Studies on Moisture Effects on Powder Flow and Mechanochemical Improvement of Powder Flowability

Advances in Sciences and Technology

Opaliński Ireneusz¹  Chutkowski Marcin¹  Przywara Mateusz¹  Leś Karolina¹  Stasiak Mateusz²  Olechowski Marcin³ 

[1] Department of Chemical and Process Engineering, Rzeszów University of Technology, al. Powstanców Warszawy 6, 35-959 Rzeszów, Poland;Institute of Agrophysics, Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland;TEREZ Performance Polymers Sp. z o.o. Rogoźnica 304, 36-060 Głogów Małopolski, Poland;

关键词: powder flow;    moisture content;    mechanochemistry;    dem;   

DOI  :  10.12913/22998624/135395

来源: DOAJ

【 摘 要 】

Recent findings on some unsolved powder rheology problems and new challenges regarding mechanochemical powder processing and flow modelling are presented. There is remarkable difference in rheology when processing moist powders in static or dynamic conditions. Despite of regular trends of shear stress changes with humidity found in the both cases, some exceptions revealed the significant impact of particles size and their hygroscopic nature as example. Mechanochemical methods of high-energy interactive mixing of highly cohesive powders doped with nano-sized solid admixture enabled their flowability to be improved considerably. Using statistical approach, more general routine is proposed that allow the optimal mixing parameters to be reliably predicted with limited number of experiments needed. Ability to flow of some hygroscopic powders was examined with DEM method and extreme sensitivity of model output to input particle properties was found. The common DEM routine towards powder flow prediction is therefore suggested to be replaced with approach featuring in using DEM method to identify some unknown powder flow factors.

【 授权许可】

Unknown