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Discrete element model of particle transport and premixing action in modified screw conveyors

Authors :
Pezo, Milada L.
Pezo, Lato
Jovanović, Aca
Terzić, Anja
Andrić, Ljubiša
Lončar, Biljana
Kojić, Predrag
Pezo, Milada L.
Pezo, Lato
Jovanović, Aca
Terzić, Anja
Andrić, Ljubiša
Lončar, Biljana
Kojić, Predrag
Source :
Powder Technology
Publication Year :
2018

Abstract

In this paper, five types of horizontal single-pitch screw conveyors with modified geometry, with three different lengths (400, 600 and 800 mm) were investigated for transport and auxiliary mixing action of two materials: natural zeolite and quartz aggregate (sand) with particle sizes 3, 4 and 5 mm. The geometry of the screw transporter is changed by welding three additional helices oriented in the same or the opposite direction from screw cutting edges, enabling the premixing of materials, during the transport. The proper mixing of the observed materials provides an adequate disposition of zeolite particles within the composite and prevents agglomeration and interference with cement hydration. Zeolite application as a binder in a building material is a possible solution to environmental pollution problems caused by cement production. The influences of screw length, particle diameter, the studied geometry variations of screw design, on the mixing performances of the screw conveyor-mixer during material transport were explored. All investigations were performed experimentally and numerically, by using Discrete Element Method (DEM). The experimental results and the results of the DEM investigation were used for the development of mathematical models for the prediction of mixing quality, which are presented in the form of second order polynomial and artificial neural network model.

Details

Database :
OAIster
Journal :
Powder Technology
Notes :
Powder Technology
Publication Type :
Electronic Resource
Accession number :
edsoai.on1363259720
Document Type :
Electronic Resource