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Linear Motion Screen

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Derrick Linear Motion machines are designed for high volumetric capacity when fed slurry with a low percentage of oversize solids. This performance characteristic is achieved by the use of Derrick vibratory motors rotating in opposite directions creating high G-force, true linear motion causing forward, uphill conveyance of solids out of the fluid pool that forms near the feed end of the machine. Head or pressure from the liquid pool enhances the fluid throughput through the screen panels. The high G-force acceleration and uphill movement of the solids promotes the production of an oversize fraction that is consistently stackable and conveyable. When fitted with high G-force Derrick vibratory motors and fed thickened slurry, typically from hydrocylcone underflow, the Linear Motion machines perform a dewatering function that enhances the removal of free liquid from the oversize solids. Derrick HI-G® Dewatering machines utilize a combination of small diameter hydrocyclones mounted over a Linear Motion machine to recover and dewater solids as fine as 400 mesh (38 microns). Numerous HI-G Dewatering machines can be found operating in sand, aggregate, coal, concrete, graphite and other mining dewatering applications worldwide. Four sizes of Linear Motion machines are available to meet the variable screening capacity needs of the industrial minerals, precious metals, ferrous metals, non-ferrous metals, fertilizers, industrial wastewater and municipal wastewater industries. Abrasion resistant urethane coatings and sealed-for-life Derrick vibratory motors assure long-life, low maintenance operation. The machines’ versatile design allows for the use of both traditional wire and Derrick anti-blinding, high open area Polyweb® urethane screen panels. The combination of these features ensure outstanding wet screening and dewatering performance with minimal operator involvement