TUNRA Bulk Solids

Australia

TUNRA Bulk Solids

Australia
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Roberts A.W.,University of Newcastle | Donohue T.J.,TUNRA Bulk Solids | Chen B.,TUNRA Bulk Solids | Munzenbercer P.,TUNRA Bulk Solids
Bulk Solids Handling | Year: 2016

The paper presents a theory, combined with design equations, to compute the loads on structural elements, in particular those of trestle legs of tubular construction supporting load-out belt conveyors, where the trestle legs are substantially buried in gravity reclaim stockpiles. The stress conditions, both active and passive, that arise during filling and reclaim are examined taking into account the position of the trestle supports with respect to the load out conveyor discharge during filling, and reclaim hoppers during draw-down. The theory examines the various loading conditions due to the stored bulk solids focusing on the determination of the lateral or bending load distribution on the trestle support legs. The compressive, in-plane shear traction loads which may influence the buckling effect in the buried legs are also examined.


Roberts A.W.,TUNRA Bulk Solids | Krull T.,TUNRA Bulk Solids | Williams K.C.,TUNRA Bulk Solids | Williams K.C.,University of Newcastle
Bulk Solids Handling | Year: 2014

The safe ocean transport of bulk cargoes on large bulk ships is vitally dependent on the stability of the cargo under the influence of the rolling pitching and yawing motion of the ship and the transmission of vibration from the ship's engine and propulsion machinery as well as wave motion induced whipping. Safety standards for ship transport are set by such bodies as the International Maritime Organisation with recommended tests for the assessment of bulk ores deemed suitable for safe ship transport. These test procedures are somewhat empirical and take no account of the well established and proven flow property tests, analysis and design methodologies widely accepted in field of bulk solids handling. These matters are discussed in this article. The stress states in loaded bulk cargoes are examined with respect to the establishment of maximum limits for surface rill angles as a function of a ship's roll angles.


Chen X.L.,University of Newcastle | Wheeler C.A.,Tunra Bulk Solids | Donohue T.J.,Tunra Bulk Solids | Roberts A.W.,Tunra Bulk Solids | Jones M.G.,Tunra Bulk Solids
Bulk Solids Handling | Year: 2012

This paper presents work undertaken to model dust emissions from belt conveyor transfer chutes. Several transfer chute configurations were investigated during the course of the project with the aim of analysing the performance of each usingscale model laboratory testing. The experimental work involved measuring the quantity of fugitive dust, in addition to the velocity of the entrained air at the exit of the chutes using Particle Image Velocimetry (PIV). Computational Fluid Dynamics (CFD) was then used to theoretically analyse the flow patterns of the granular material and entrained air in each of the transfer chute configurations. The predicted air velocities and flow patterns obtained from the simulations compared favourably with the experimental results, demonstrating that CFD can be used as an effective tool to model and evaluate the performance of transfer chute designs with regards to dust emission.

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