Pit & Quarry, April 2013

EQUIPMENT FOCUS CONVEYING MATERIAL HANDLING The TXI Streetman ES C operation uses a great deal of conveyor belting require strength without excessive weight projects that include highway surfacing concrete bridge decks highrise buildings masonry soil amendment and more The TXI Streetman ES C plant is located near Corsicana Texas which is about 65 miles south of Dallas Plant Manager Wynne Stallcop says many in the aggregate industry know about his plant but few truly understand our processes He describes the plant as a hybrid facility as it operates crushing and screening circuits but it also operates a kiln After shale is excavated crushed and screened into various sizes particles are fired in the rotary kiln at temperatures exceeding 2000 F At these extreme temperatures gasses form tiny air cells within the aggregate A hard vitreous membrane consisting mainly of silica and alumina surrounds each air cell The glowing red hot aggregate is then discharged into a cooling container followed by screening and storage in various product stockpiles Big problem Stallcop says that the plant has considerable conveyor belting due to the nature of its process We have more than 15000 ft or about three miles of belting We maintain about 3800 troughing idlers and those are just the 35 degree 5 in can idler rolls With the normal friction of the belt or with material buildup we were wearing out cans left and right I could literally have a team doing nothing else but replacing idler rolls during each shift he says adding that he started pressing his maintenance team for ideas on what could be done to extend idler life We needed idlers that would give us significantly more wear life because we wanted to reduce maintenance costs When idlers fail you have the potential of tearing up the belt and you have the downtime the housekeeping and all the other costly situations that occur when the belt is not running Stallcop says Local equipment dealer McCourt Sons recommended the facility try the use of Moxie Rolls which are de Atlas Copco Your full line hydraulic breaker source Need a breaker No matter the size we have what you need No matter which size you choose Atlas Copco hydraulic breakers have a higher powerto weight ratio and are more efficient than previous models SB line optimized for use on carriers in the 07 to 15 ton classes MB line designed for carrier weight classes from 10 to 32 tons HB line the heaviest breakers in the Atlas Copco range for use on carriers ranging from 22 to 140 tons Call your dealer today to learn how you can increase your productivity improve performance and decrease your total cost of ownership with the newest generation of hydraulic breakers from Atlas Copco 800 732 6762 www atlascopco us www pitandquarry com April 2013 PIT QUARRY 11