A Model to Evaluate the Dustiness of Powders and Binary Powder Mixtures. Issue 1 (4th December 2017)

• Record Type: Journal Article
• Authors: Parey, Matthias; Schmidt, Eberhard
• Is Part Of: Chemical engineering & technology. Volume 41:Issue 1(2018)
• Page Start: 35
• Page End: 43
• Publication Date: 2017-12-04
• Subjects: Adhesion force -- Binary powder mixtures -- Corundum‐blended limestone -- Dust emission -- Powder handling; Chemical engineering -- Periodicals; Chemical processes -- Periodicals; 660.05
• DOI: 10.1002/ceat.201700204
• Languages: English
• ISSNs: 0930-7516

Abstract

Abstract: Dust emissions of powder handling processes lead to several problems with regard to health, environment, and product quality. Currently, there is no universal method to predict the character and extent of dust release. A model to evaluate the dustiness of powders and binary powder mixtures is introduced and discussed. Disperse characteristics, different particulate material compositions, and effective adhesive forces are considered as the leading factors affecting the dustiness. The outcome of the model allows comparing theoretical dust emissions from different designed powders and predicting the composition of the released dust. The model is demonstrated based on corundum‐blended limestone powder. The study also provides a comparison to experimental data. Abstract : No universal method to predict the character and extent of dust release is available to date. The auxiliary quantity activity is introduced as the ratio of the fines fraction of a powder and the adhesion forces binding it to the remaining powder. In this way, the inherent dustiness of various powders can be compared and the composition of the released dust of binary mixed powders may be predicted.