Pit & Quarry, July 2017
CRUSHING ly crushed granite with an MC 110 jaw crusher in the cut Cameron says We backed it up against the shot highwall and crushed the stone That crusher run aggregate was dumped in a hopper and slid down an HDPE high density polyethylene pipe to a stationary plant where it was processed further ABANDONED IN LINE CRUSHERS In Hendersonville Harrison used its new MR 110 ZS EVO mobile impactor to The Harrison Quarry Division operates seven quarries plus a sand plant and aggregate sales yard all of which provide crushed stone and aggregate products process RAP instead of an in line crusher With Tennessee DOT Department of Transportation if we process the RAP to the right size and spec we can return a higher percentage of RAP back into the mixes Cameron says Weve tried inline crushers in our plants but nowadays the DOT allows more and more recycled asphalt into the mixes and in line crushers just cant keep up But if we run mobile impact crushers instead we can get better production at a lower per ton cost The DOT accepts up to 15 percent RAP in surface mixes and up to 30 percent in base mixes Cameron says In Tennessee we crush a 5 8 in minus RAP particle and in North Carolina we do 5 8 in minus and some 3 4 in minus for base mixes he says With a crusher inlet opening of 44 in the MR 110 can take nearly anything thrown at it Cameron adds and thats great for productivity If there is waste material at the plant or the customer brings in large slabs of asphalt you could not do anything with them with the in line crusher he says Youd have to pre crush it anyway so we might as well have the bigger crusher to start Both of Harrisons MR 110 Z impactors incorporate effective primary prescreening by means of a double deck screen incorporated in the feed system This prescreen removes fines ahead of the crushing circuit and either sorts them off to the side or reintroduces them to the crushed material IMPACT EVENT WHEN PURPOSE BUILT RELIABILITY MEETS BUDGET CONSCIOUS PERFORMANCE Allied Hy Ram hammers reflect almost 75 years of designed in value meeting pit and quarry needs for efficient reliable economical aggregate solutions Thoughtfully designed to work as an integral component of small medium and even large excavators minis and skid steer carriers Hy Ram hammers are easy to use Easy to maintain Easy on your bottom line For details visit an authorized Allied distributor or call 800 321 1046 THERES NO SUBSTITUTE FOR EXPERIENCE Visit Our New Website ALLIEDCP com 8003211046 26 PIT QUARRY July 2017 pitandquarry com
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