The first stage of the process achieves maximum removal of +30 mesh (600 micron) particles by feeding four Derrick Linear Motion scalping screens with the 100 mesh (150 micron) sand slurry supplied by a hydrocyclone stage. The oversize solids are conveyed to waste piles, while the undersize fraction is collected and used as feed in the 50 mesh (600 micron) separation. This separation is accomplished by successive screening stages of the oversize fractions until at least 90 percent of the final oversize fraction is between 30 and 50 mesh. The 30/50 frac sand is then fed to three Derrick Linear Motion dewatering machines to reduce moisture content in the 30/50 product to 16 to 20 percent. Click Here For Complete Article Text
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