Rock Products

JUL 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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18 • ROCK products • July 2015 working in one of Great Lake Aggregates' other quarries a few years prior to this. "We were expe- riencing severe blinding; it was so bad that every 90 minutes the operation would shut down for 20-30 minutes to beat the blinded material out of the screen media with a hammer. The quarry switched to Flex-Mat 3 and never had a problem with blinding again." Another challenge faced by Sylvania Minerals was their overflowing settling ponds. Their initial solution was just to build another settling pond but the $100,000 price tag made exploring other options more appealing. In another area of the plant they installed Major Wire's HyperSlot screen media. It is a slotted screen media with unique alternating crimped and straight wires that result in an uneven sur- face with one straight wire followed by one crimped wire. The crimped wire causes the mate- rial to slow down giving the material more time to pass over the openings and also results in bet- ter fines removal. Since installing the HyperSlot screen media on the bottom deck, quarry personnel have noticed a 50 percent decrease in material entering the settling pond – down from the former 220 tph to only 110 tph. This change to HyperSlot screen media has allowed the quarry to delay the cre- ation of an additional settling pond while provid- ing another saleable product. s Information for this article courtesy of Gary Ped- erson, vice president of sales for Major Wire Indus- tries Ltd. in Candiac, Quebec, Canada. Great Lake Aggregates installed Flex-Mat 3 Tensioned Series D on both the top and middle screen decks to improve throughput and for its longer wear life. Great Lakes Aggregates' South Rockwood, Mich., facility produces nearly 1 million tpy of limestone. How to Beat Blinding

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