Rock Products

SEP 2015

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

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www.rockproducts.com ROCK products • September 2015 • 23 • Is your pulley system as well as its idlers square with the belt's center line? If not, readjust them. Also veri- fy that the conveyor frame is square, level and properly supported. • Is material starting to build up when in operation? If so, install scrapers or brushers to help clean the belt while it's in use. • In case of idler strands, you will want to check that everything is properly centered and aligned. Loaded Belt Not Tracking On rare occasions the belt will make good contact with idlers when empty but begins to malfunction when loaded. You will need to readjust the idlers for belt contact when loaded with weight. Another common problem is when the load chutes are off-center. Realign the load chutes if necessary and also ensure that they drop material in the same direction that the belt travels. Belt Stretching Excessively If your belt is overstretched when in use, you may perhaps have too much tension in your operation. Test that you have the right tension belt for the load travel. Aside from completely replacing the tension belts, some steps to counter this issue include: • Decreasing the load while increasing the speed of the drive motor. • Adjusting or applying soft start motor controls. • Inspecting to make sure that your counter weight and screw take-up are at adequate levels. • If applicable, decrease the angle of incline while increasing the tension rating and number of belt plies. Belt Stalls or Jerks If your belt is stalling or jerking, your slack slide tension is off. Increase your take-up position, and also look at your drive pulleys and adjust the lags if nec- essary. It may also help to put a snub pulley behind the drive pulley to help increase the belt wrap. If none of the above are problems you face, you may want to ensure that the Bad wear on a conveyor belt. Effects of off-center loading. mechanical fasteners are operating correctly. Damaged covers can also delay production, so you will need to check that you're using the right cover for your type of loads. • Spilled oil or grease can cause covers to swell or become soft. A major point of contamination is over-greased bearings. • Heat affects covers and causes them to crack. Chemical damage can also cause hardening and cracking. If cov- ers are not in use, store them indoors to prevent damage from UV rays and the elements. • Always ensure that you are using the right compound for your operation. This will help offset any potential costly setbacks. There are many effective solutions if you are experiencing mining conveyor equipment problems. If you experience production errors that have not been mentioned here, contact your equip- ment manufacturer for further trouble- shooting tips and advice. Information for this article courtesy of Applied Conveyor Technology Inc., which has distributed equipment to aggregate companies nationwide for almost 25 years. Visit them on the web at www. groupact.com.

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