Pit & Quarry, July 2015
CRUSHER SAFETY never know what were going to crush within reason Dallimore says When its on a tracked mobile unit they can be on one site one week and on a completely different site crushing completely different material the next week Concrete crushing typically involves handling plastics PVC and rebar and these present hazards to equipment These dont necessarily behave well in a crusher Smith says You have the potential to rip belts for stuff to get hung up at the bottom of the crusher Or it might block the discharge part of the crusher and you get buildup in that area Asphalt presents unique problems in a recycling application as well It can stick like chewing gum to discharge chutes and other components plugging up the machine over time Even a few days or a week of use can block up a crusher Smith says Every producer is encouraged when they start up a new plant to baby the plant for a period of time he says See how the equipment handles that material If they move it to a second location things like moisture index change The introduction of new material on a new site might require more frequent cleaning than before But even cleaning a crusher presents safety issues Ive read a story about a guy inside an impact crusher on a recycle job Smith says The door of the impactor was open and he was inside it cleaning off some of the asphalt buildup While in there he motioned the guy to turn the impactor a little bit When the guy did that the impactor came up to full speed and the guy got chewed up in a matter of seconds All the more reason to treat every task related to clearing a blocked crusher with extreme caution Some of these machines behave like Swiss watches They require a certain amount of oil Smith says We do a lot of things to safeguard and keep bad things from happening but you still need to find hire and train the right people We really need to do that P Q PIPEPLUS L Whatever your pumping and piping needs turn to industry leaders ISCO Industries and GIW Industries Nobody stocks or delivers more HDPE pipe and associated products than ISCO including a full line of mechanical connections and molded and fabricated fttings GIW leads the way in the design and manufacture of heavy duty centrifugal slurry pumps in many sizes models across multiple applications And both companies excel in professional consultation and service to tackle even the most challenging projects Make the call for TOTAL PIPINGAND PUMPING SOLUTIONS 1 800 345 ISCO www isco pipe com ISO 9001 2008 certifed quality management system www pitandquarry com July 2015 PIT QUARRY 43
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