Pit & Quarry, June 2014
recommended to reduce the fines currently going to the effluent treatment solution OBrien said settling tests were run to determine the settling and compaction rates as well as underflow densities for deep cone and or high rate thickeners that would remove the remaining solids in the effluent The McLanahan team ran filtration tests on the resulting thickener densities to find the optimal equipment combination Weve eliminated the downtime from having to shut down the operation to deal with the settling pond Jason Voss Stevens Creek Quarry to minimize capital costs and produce cakes that could be easily handled and used for reclamation Rich and Jason Voss selected a deep cone thickener over a traditional high rate thickener as the higher density underflow from the Deep Cone Thickener resulted in shorter press cycles as well as a lower total capital cost EQUIPMENT FOCUS WASHING CLASSIFYING Today where the 100 x 200 ft 305 x 609m settling pond once existed Stevens Creek now has a convenient area for stockpiling aggregate DeDiemar Material fed to the filter press is dewatered into cake that is 75 to 80 percent solids says the quarry has been able to increase its stockpile inventory area owing to the system which will allow the operation to expand its volume if needed Weve eliminated the downtime from having to shut down the operation to deal with the settling pond Jason Voss says Even though the filtering is done as batches its going while the You can trust Falvey Steel Castings for service quality and price For more than 50 years we have supplied some of the largest quarries in the world with high quality Manganese spare crusher parts Our experienced sales staff will assist you in maximizing your tons per hour while reducing your cost per ton Extensive Years in the quarries and foundries results in superior service to our customers We pride ourselves in being the best So CRUSH WITH THE BEST www falveysteel com 781 767 6210 www pitandquarry com June 2014 PIT QUARRY 13
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