Chemical Engineering & Technology
Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Recent Special Issues
Edited by: Bernd Epple
Edited by: Zuoliang Sha, Qiuxiang Yin and Jianxin Chen
Micro Flow Processes
Edited by: Volker Hessel and Qi Wang
Grinding and Dispersing
Edited by: Arno Kwade
Recently Published Articles
- Evaluation of Impact Velocity and Compression Force of Moist Zeolite 4A Granules at Breakage using an Equivalence Function
Peter Mueller, Sergej Aman and Juergen Tomas
Article first published online: 7 APR 2014 | DOI: 10.1002/ceat.201300792
The mechanical properties of granules must be known to avoid problems during processing and transportation. Moist spherical zeolite 4A granules were tested by compression at a constant loading velocity until primary breakage. The granules were rectilinearly accelerated and impacted to achieve breakage. Compressive breakage force and impact breakage velocity distributions were determined.
- CFD-Discrete Element Method Simulations Combined with Compression Experiments to Characterize Stirred-Media Mills
Stefan Beinert, Carsten Schilde, Greta Gronau and Arno Kwade
Article first published online: 7 APR 2014 | DOI: 10.1002/ceat.201300716
Micro-compression tests of single model aggregates and coupled CFD-discrete element method simulations are linked to improve the prediction of the dispersion progress in stirred-media mills. The dispersion efficiency is calculated by the stress energy distribution of an annular-gap mill and the breakage distribution of the particle system.
- Ultrafine Grinding of Limestone with Sodium Polyacrylates as Additives in Ordinary Portland Cement Mortar
Katja Ohenoja, Sandra Breitung-Faes, Päivö Kinnunen, Mirja Illikainen, Juha Saari, Arno Kwade and Jouko Niinimäki
Article first published online: 7 APR 2014 | DOI: 10.1002/ceat.201300707
Nano-grinding of limestone in a stirred media mill is an interesting method for nano-CaCO3 production. More energy-efficient grinding of CaCO3 can be achieved by adding sodium polyacrylate with a low polydispersion index as grinding aid. Original Portland cement mortar tests were performed with ground nano-CaCO3 particles. The heat of hydration is accelerated.
- Mechanochemistry in Technology: From Minerals to Nanomaterials and Drugs
Peter Baláž, Matej Baláž and Zdenka Bujňáková
Article first published online: 7 APR 2014 | DOI: 10.1002/ceat.201300669
Mechanochemical processing can effectively control and regulate the course of solid-state reactions. Possible applications of mechanochemistry in extractive metallurgy, materials engineering, and medicine are illustrated with several examples. Potential alterations of solid properties are described and the advantages and particularly attractive environmental aspects of these processes are explained.
- Progress and Challenges in Electrical Comminution by High-Voltage Pulses
Fengnian Shi, Emmy Manlapig and Weiran Zuo
Article first published online: 7 APR 2014 | DOI: 10.1002/ceat.201300660
Comminution consumes about one third of the energy used by the mining industry. Therefore, improved methods for mineral comminution are continually being sought. A particle pre-weakening characterization method by single-particle/single-pulse test has been developed. Challenges in terms of facilities scaling-up, circuit design, generation of cracks, and downstream effects are discussed.