Aggregates Manager Digital Magazine
Issue link: http://read.dmtmag.com/i/248272
When oversized rock is introduced into the jaw, but is too large to fit into the chamber, it creates an interruption in crushing, which equals no production. Presizing material is vital to providing the proper feed and achieving high production. ing chamber, up to five times the normal crushing forces. As with any force that is generated, the energy must find a point of release, which is usually in the jaw base structure or in the shaft and bearings. Over time, this can cause damage, Lippert says. Excessive amounts of fine material also limit production because these fines are taking the place of otherwise crushable larger rock. Compaction can also be caused by improper use of the jaw die or plates. The corrugations of the jaw dies are crucial to the jaw performance, as the corrugations provide the expansion room needed as well as the leverage required to break the rock. Jaw dies should be flipped or replaced once the remaining corrugations get to about 20 percent of their beginning dimensions or irregular wear is detected. The wear of a jaw die should be gauged by the PHOENIX SmartWash™ Technology Pictured is a brandnew jaw die. Jaw dies should be flipped or replaced once the remaining corrugations get to about 20 percent of their beginning dimensions or irregular wear is detected. remaining corrugations at the bottom, not the overall weight of the jaw die itself. Aim for attrition crushing If the proper feed size is introduced into the jaw and the jaw die maintenance is performed as recommended, the result will be a higher output, and true attrition crushing will take place. Attrition crushing, or rock-on-rock crushing, helps with output gradations and improves wear cost for the producer, as more of the wear takes place on the rock rather than the jaw dies. As with all crushers, the maintenance of a crusher depends on how it is applied and taking a proactive approach to maintenance items like wear parts. Replacing wear parts before they VUE YOUR RESULTS THE LATEST IN LOADER SCALES NEW WEIGHLOG VUE Customizable Systems for Reliable Cost Effective Fines Dewatering 50905 Easy to Use 7'' Color Touchscreen Wheel Loader Scale and Reverse Camera. See your accumulated loads, target loads, customer name, material and more. Save Load Data to SD Card & USB Memory. Full Featured Scale for any Operation. JOIN US AT CONEXPO BOOTH # 64109 2402 Watterson Tr, Louisville, Kentucky 40299 p: 502.499.6198 f: 502.499.1079 phoenix@dewater.com www.dewater.com 40 AGGREGATES MANAGER February 2014 www.loupelectronics.com or call (877) 489-5687