By A. Edilbert , R. Spaargaren, C. Geijs, J. Ruijgrok, G. Lodewijks, D. Schott – This paper aims to redesign a transfer chute as used in a Eurosilo system specifically for handling coal. The velocity of material vertically entering the chute was estimated at 15 to 34 m/s depending on the fill height of the silo. A three-stage approach was taken. First the existing situation with the highest velocity was modelled with DEM (Discrete Element Simulations), and the results of the wear profile on the existing chute were compared with practice. Secondly, three configurations were designed and the performance of these configurations in terms of wear volume were tested by simulation. Thirdly, and lastly, the performance of the configuration in terms of ensuring material flow through the chutes for a cohesive coal was evaluated. Based on the results of the simulation, two chute designs showed an improved performance where less wear was observed while securing flow through the chute. Continue reading Design of a High Speed Transfer Chute in a confined Space – A DEM Case Study
Martin Marietta Controls Damage & Spillage at Limestone Conveyor Drop Points
New Braunfels, TX, USA – The largest cement producer in the state of Texas has eliminated a source of fugitive material and equipment damage on one of its essential conveyor arteries transporting crushed limestone from a storage dome to two kilns through an underground tunnel. The Martin Marietta facility in New Braunfels adopted several technologies from Martin Engineering to mitigate the effect of drop forces from 8-inch minus rocks falling 20 feet onto the B-06 conveyor, including a rock box, impact cradle, settling zone and skirt sealing. Installed with a series of belt trackers to maintain proper alignment and a V-plow system to protect the tail pulley, the upgrades are helping the Hunter plant in New Braunfels avoid belt and idler damage, spillage and downtime.