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Derrick Linear Motion machines have a long history of performing in trash screening and wet scalping applications. They are designed for high volumetric capacity when fed dilute slurry with a low percentage of oversize solids. This performance characteristic is achieved by the use of Derrick Vibrators rotating in opposite directions creating high gforce, 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 gforce acceleration and uphill movement of the solids promotes the production of an Oversize fraction that is consistently stackable and conveyable.
Derrick® Dry Sizing machines have been providing the industrial minerals industry solutions for fine dry screening application for over 60 years. Traditional Derrick dry sizing machines have utilized high speed, low amplitude, vertical elliptical motion to solve countless difficult mineral sizing challenges. Derrickâs commitment to pioneering technology has resulted in the recent evolution of dry screening technology to include dry sizing machines designed to utilize true linear motion to achieve higher capacity with small floor footprints, to include dry sizing machines that utilize an alternate paralleltoflow screen panel tensioning system (âFronttoBackâ tensioning) to achieve higher capacity within the traditional Derrick machine footprint and to include a new series of Derrick Polyweb® urethane screen panels to provide long life, antiblinding surfaces. Numerous machines can be found worldwide screening silica sand, iron powder, nickel powder, crushed glass, coal, polyethylene pellets/resins and many other materials.
The development of fine mesh, high open area, urethane screen surfaces is perhaps one of Derrickâs most notable contributions to the science of fine particle separations for both wet and dry applications. While all urethane screen panels are well known for their abrasion resistance, only Derrick Polyweb screens combine long life with high open area, capacity, and performance rivaling that of conventional woven wire screens. Moreover, its antiblinding properties now make it feasible to screen materials previously considered difficult or even impossible to screen.
Noncontact level switches Ecophyspribor are the set of devices that intended for detection of presence or absence of liquid or bulk material inside the tested vessel on the definite level. The absence of contact between device components and tested material allows to use the Ecophyspribor level switches for control of vessels filled with: corrosive, abrasive, aggressive, toxic, biologyhazard materials; molted and cryogenic materials; foams, suspensions, slurries, powders, pulps, charges. Temperature and pressure inside the vessel can be of any value.
Derrick Corporation has once again redefined high capacity, high efficiency, fine particle wet screening with the introduction of the SuperStack®. With 8 decks operating in parallel and innovative FronttoBack (FTB) tensioning system, the SuperStack has a demonstrated capacity up to 3 times that of the best fine screens currently available. All of this added capacity comes with only a slight increase in the space required per machine, significantly reducing the total capital and installation cost as well as OPEX for any screening installation.
Derrick continues to develop new, innovative, high capacity screening equipment to advance gold processing. Our efforts focus on reducing operational expenditure (OPEX), development of new patented technologies, and minimizing maintenance and footprint to reduce environmental impact. All of which contribute to a favorable return on investment (ROI). These solutions include trash screens, urethane interstage screens, carbon sizing screens, dewatering screens, tails safety screens, and other processing stages.
