Optimisation Of Process Parameters In High Energy Mixing As A Method Of Cohesive Powder Flowability Improvement

• Autorzy: Leś K. , Kowalski K. , Opaliński I.

Identyfikatory

DOI

10.1515/cpe-2015-0032

• Języki publikacji: EN

Abstrakty

EN

Flowability of fine, highly cohesive calcium carbonate powder was improved using high energy mixing (dry coating) method consisting in coating of CaCO3 particles with a small amount of Aerosil nanoparticles in a planetary ball mill. As measures of flowability theangle of repose and compressibility index were used. As process variables the mixing speed, mixing time, and the amount of Aerosil and amount of isopropanol were chosen. To obtain optimal values of the process variables, a Response Surface Methodology (RSM) based on Central Composite Rotatable Design (CCRD) was applied. To match the RSM requirements it was necessary to perform a total of 31 experimental tests needed to complete mathematical model equations. The equations that are second-order response functions representing the angle of repose and compressibility index wereexpressed as functions of all the process variables. Predicted values of the responses were found to be in a g ood agreement with experimental values. The models were presented as 3-D response surface plots from which the optimal values of the process variables could be correctly assigned. The proposed, mechanochemical method of powder treatment coupled with response surface methodology is a new, effective approach to flowability of cohesive powder improvement and powder processing optimisation.

Słowa kluczowe

EN

flowability; cohesive powder; dry coating; planetary ball mill; response surface methodology

PL

płynność; proszek spoisty; powłoka sucha; planetarny młyn kulowy

• Wydawca: Komitet Inżynierii Chemicznej i Procesowej Polskiej Akademii Nauk
• Czasopismo: Chemical and Process Engineering
• Rocznik: 2015
• Tom: Vol. 36, nr 4
• Strony: 449--460
• Opis fizyczny: Bibliogr. 26 poz., tab., rys.

Twórcy

autor

Leś K.

• Rzeszow University of Technology, Department of Chemical and Process Engineering, Powstańców Warszawy 6, 35-959 Rzeszow, Poland

autor

Kowalski K.

• Rzeszow University of Technology, Department of Chemical and Process Engineering, Powstańców Warszawy 6, 35-959 Rzeszow, Poland

autor

Opaliński I.

• Rzeszow University of Technology, Department of Chemical and Process Engineering, Powstańców Warszawy 6, 35-959 Rzeszow, Poland

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