Pit & Quarry, October 2017
CONVEYING MATERIAL HANDLING through town every two minutes or rail going through every hour The fact that the company did what it had to do to get limestone from New Windsor to Union Bridge in the best possible manner I give them a lot of credit for that HORIZONTAL CURVE A conventional conveyor remains in a straight line typically measuring between 100 ft and 1000 ft according to Beumer Group which partnered with Lehigh Hanson on its overland conveyor Lehigh Hansons key conveyor however is a horizontal curved trough conveyor measuring more than 21000 ft The most unique design feature on this is all of the steel we designed that is capable of going around a horizontal and a vertical curve says Brad Williams vice president of systems at Beumer Group And the design is a challenge Overall the Lehigh Hanson conveyor Lehigh Hansons key conveyor is a horizontal curved trough conveyor measuring more than 21000 ft dubbed conveyor No 4 features 27 vertical curves and five very long horizontal curves in order to get the arch shape Williams says Beumer first began design on the project in fall 2014 engineering and fabricating the structure Beumer also helped Lehigh Hanson to develop a route for the conveyor coming to the location in central Maryland by fall 2015 to begin construction While conveyor No 4 serves as the longest single connection between the New Windsor Quarry and Union Bridge Cement Plant Beumer installed a series of three traditional conveyors along with the one horizontal curve conveyor in order to bridge the two sites Beumer supplied three conveyors in addition to the overland conveyor Williams says Conveyor No 4 is the overland conveyor and the traditional conveyors are named conveyor No 2 conveyor No 3 and conveyor No 5 Conveyor No 2 a 54 in wide conventional conveyor stretches 880 ft and carries limestone from Lehigh Hansons Hazemag crusher to a transfer tower and then onto its overland conveyor Near that transfer tower conveyor No 3 serves as a 54 in wide 112 ft long emergency stack out conveyor This conveyor allows limestone to be conveyed to a stockpile in case the overland conveyor is down for maintenance or S4 PIT QUARRY October 2017 pitandquarry com PHOTO BY MEGAN SMALLEY A view of Lehigh Hansons Union Bridge Quarry with the cement plant in the distance
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