A Complete Line of Wet & Dry Fine Screening, Fines Recovery and Dewatering Equipment

Derrick History

HI-G Dryer Fines Recovery System

Hydrocyclones

Vibrating Motors

DE-7200 VFD Centrifuge

HI-CAP Dewatering Screen

Sand Production Systems

Wet Fine Screening Repulp Screen

Wet Fine Screening Belt Scalper & Sieve Bend

Dry Fine Screening

Screen Technology

Full Scale Customer Testing Laboratory

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Table of ConTenTs

The Derrick Commitment

With the development of the first high speed vibrating screen machine by founder H. William Derrick Jr. in 1951, the primary commitment of the Derrick Corporation has been to design and manufacture rugged, dependable, high quality equipment to serve the process industries. By approaching each individual application as a new challenge to our design engineering and fabrication capabilities, Derrick continues to provide customers with state-of-the-art equipment to meet their ever-changing needs. Quality, innovation and reliability are our pledge today and for the future.

DerriCk HisTory

The hisTory of Derrick

Privately owned, Derrick Corporation was founded in 1951 by H. William Derrick Jr., affectionately known as The Chief throughout his business career. In 1947, he joined forces with his father-in-law, William L. Wettlaufer, an inventor who held a series of patents to manufacture high frequency therapeutic vibrators and slow speed vibrating screen machines. Together, they developed a high speed vibrator to shake testing sieves.

In order to develop and market this idea, Bill Derrick went out on his own, and in 1951 he teamed up with Messinger Bearing Co. to develop the first four bearing high speed screen vibrator. It was in this same year that Derrick Manufacturing Company was formed as a proprietorship. In 1952, Dick Vale, one of Bills cousins joined the company, followed shortly afterwards by his brother Bob Derrick in 1954. In 1955 the company relocated to 590 Duke Road, where today this original space is still a part of Derricks 334,000 ft2 (31,030 m2) facility.

During the first half of its existence, Derrick Manufacturing focused on applications in the mining, industrial, and chemical industries and built an impressive reputation for solving a wide variety of the most difficult fine screening and separation problems.

Another key development occurred in the mid-80s. Derrick sought out potential partners to assist in the development of high open area polyurethane screen surfaces. No partner was found as everyone thought Derricks expectations were impossible. Derrick developed this product on its own and today, Derricks high open area, long life polyurethane screen surfaces are unique in the world. With open area and capacity rivaling woven wire, Derrick urethane panels outlast woven wire by factors of 10 to 20.

With 3 generations of Derricks actively involved in the business, it is committed to the guiding principles and philosophy that have led to its success. Derrick is committed to providing customers with state-of-the-art equipment to meet their ever-changing needs. High quality, innovation and reliability are Derricks pledge today and for the future. A firm commitment to research and development enables Derrick to maintain its position as a leading innovator. Derrick also stands behind its commitment to a vertically integrated, in-house production system.

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Hi-G Dryer fines reCovery sysTem

Recoveryupto80%ofthesolids currentlyreportingtoyoursettling pondfacility

Recoverultrasandsandsilts

Greatlyreducepondcleaningefforts

Increasethelifeofyourcurrentsettling pondfacility

Drasticallyreducemaintenancecosts involvedwithcleaningsettlingponds

Allrecoveredsolidsareprovidedina consistentlystackableandconveyable format75to80%solids

Turnoncewastedmaterialintoa marketableproduct

Nocostlypolymers,flocculantsor chemicalsneeded

fines recovery sysTem

HI-G Dryer Fines Recovery System The generation of fine solids are by far the largest concern within the industry. The Derrick HI-G Dryer provides the most cost effective solution to handling these fines. This proven technology consists of a Derrick high G-force linear motion vibratory screen and a radial design cluster of Derrick 4 uni-body hydrocyclones. This combination provides the industry with unmatched performance and dependability.

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Hi-G Dryer fines reCovery sysTem

fines recovery sysTem PrinciPle of oPeraTion

Coarse Product

Screw Classifier To Settling Pond orFlocculation System

Derrick HI-G Dryer

RecoveredFines Product

CycloneFeed Pump

ScrewClassifierOverflow

The 4 hydrocyclones are mounted on a radial design manifold, fed by the wash plant discharge under a consistent pressure of 35 to 37 PSI. The centrifugal separation extracts the ultra fine sands and silts discharging them out the underflow. The fines are leaving the hydrocyclones at approximately 55 to 60% solids where they are fed to our high G-force dewatering screen. The HI-G Dryer dewatering unit is powered by two 2.5 HP electromechanical vibrators operating at 1,750 RPM with a stroke length of 0.19. The combination of stroke length and rotation speed create 7.3 Gs of acceleration on the screen surface, resulting in efficient separation of water from the fine solids. The dewatered fines are then discharged from the screening machine at 75 to 80% solids.

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4 hyDrocyclone

HyDroCyClones

4 Hydrocyclone Body

Body Ceramic Liner

Triangular Nut

Cone Tip

Drop-in Apex

Cone Tip Ceramic Liner

Underside of Round Desilter Manifold

4" Hydrocyclone

Cone Tip

Drop-in Apex

Triangular Nut

Ceramic LinerEU Polyurethane

4" Hydrocyclone

Cone Tip

Drop-in Apex

Triangular Nut

Ceramic LinerEU Polyurethane

4" Hydrocyclone

Cone Tip

Drop-in Apex

Triangular Nut

Ceramic LinerEU Polyurethane

4" Hydrocyclone

Cone Tip

Drop-in Apex

Triangular Nut

Ceramic LinerEU Polyurethane

4 HydrocycloneDerrick desilters are easier to operate and maintain, lasting more than twice as long as conventional desilters. The 4 hydrocyclone is manufactured from specially formulated EU polyurethane that has excellent resistance to heat and abrasion. Its unique lightweight uni-body design (one piece) eliminates excess parts and seams where excessive wear begins.

Two 4 cones are available offering different internal geometries with or without a ramp in the feed inlet. The circular pipe feed is smoothly reformed into a rectangular feed. This rectangular ramp feed enters the cone tangentially minimizing turbulence in the upper portion of the cone. This allows the solids to quickly move to the wall of the hydrocyclone providing consistent high performance recoveries. Extra long vortex finders prevent recoverable materials from short-circuiting out the overflow of the unit.

The ramp feed cone has a capacity of 80 GPM at 75 feet of head and is primarily used if the cone underflow is over a dewatering screen. Derrick hydrocyclones are available with ceramic inserts for extreme duty and provide unmatched, superior longevity. A tri-nut and drop-in apex provide the end user with complete control of the underflow (recovered solids) condition.

Round Manifold with 4 DesiltersDerrick round desilters are designed to efficiently remove silt sized solids (12-74 microns) from plant discharge slurries. Shut-off valves on each cone inlet permit individual cone removal and inspection without interrupting operation of the desilter. If oversized solids plug the underflow simply unscrew the replaceable wear section (bottom third) clean and replace. Service and replacement of the bottom cone section is made quick and easy by A.N.S.I. buttress threaded bottom sections. The apex is available in two styles: an adjustable tri-nut or fixed snap-on.

Key Features:

Availablein10,12,16,and20conemodelsUniformpressurebalanceoperationthroughrounddesignShut-offvalvesoneachconeinletVacuumbreakerconnectionLowcostpolyurethaneandceramicconeinsertsengineeredtominimizewearandmaintenanceAccessiblepressurizedsectionofmanifoldtoallowforlinermaintenance

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*Available certifications: UL (Class I, Division 1, Groups C and D), DEMKO/ATEX (Zone 1 EExd IIB T3) or ISO 9001:2000

W2 anD suPer G vibraTinG moTors

vibraTinG moTors

Proven to dramatically increase liquid/solids separation, Derrick vibrating motors produce superior conveyance due to their high G-force characteristics. Derrick vibrating motors are built with Derricks superior electrical components, which are renowned in the industry for durability. High performance and exceptional durability make the Derrick motors an asset to any aggregate facility.

W2 Motors*The W2 is the next generation of vibrating motors. Its continuous, internal oil-bath lubrication system ensures long life and robust maintenance-free operation. In addition to greatly extending the life of the motor, the hydrodynamic cushioning effect on bearing surfaces created by this unique lubrication system reduces friction, wear, heat, and sound. Sealed, continuous recirculation of lubricating oil maintains a fresh film of oil on all bearing surfaces at all times and prevents entry of contaminants. W2 motors carry a one-year warranty.

Super G Motors*Featuring permanently lubricated bearings that eliminate the need for a remote lubrication system, Derrick Super G motors reduce both repair costs and maintenance requirements. These grease-filled bearings also result in significantly lower sound output with a measured level of 81 dBA. Super G motors carry a two-year warranty.

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Super G

W2

De-7200 CenTrifuGe

De-7200 vfD (variable frequency Drive) cenTrifuGe

DE-7200 VFD CentrifugeThe DE-7200 VFD centrifuge offers the ultimate flexibility in system control, permitting it to handle a wide range of feed slurries. New technology has been combined with durability and reliability in a product that is easy to operate and fully adjustable. The result is a rugged yet technically advanced centrifuge designed for any application in virtually every environment.

Feed rates up to 500 GPM are achieved through innovative bowl and conveyor sections, redesigned discharge ports and a rugged drive system. The drive system consists of two explosion-proof inverter duty motors. A 150 HP motor drives the bowl and a 60 HP operates the conveyor.

Automatic load sensing and feed pump control enable automated performance optimization. The bowl assembly can be operated up to 3000 RPM, and the conveyor is capable of differential speeds from 1 to 90 RPM accommodating low levels of agitation and rapid solids removal. The operational methodology of the VFD requires the PLC to have complete control over the feed pump through a third AC drive. This enables feed pump control to be automatic or manual.

Advantages over a traditional belt press technology:

Extremelylowfootprintrequirements Doesnotrequireindoorinstallation Noadditionalchemicalsarerequiredpriortofeedingtheunit Nooperatorsarerequired Easieroperationfullyautomated Maintainsperformanceevenwithfeedfluctuations Minimalmaintenancerequirementsfewermovingparts Lessdowntimeandlowcostperton

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De-7200 CenTrifuGe

common floW sheeT oPTions WiTh Derrick TechnoloGy

ScrewClassifier

Sand ScrewFeed

ClassifiedWater

-500 Mesh Material

Derrick4 Hydrocyclones

DerrickHI-G Dryer

+200 MeshConcrete/Asphalt

Mason Sand 85% Solids

-200 MeshMaterial

-200 x 500 MeshApprox.

80% Solids

-500 Mesh x 0

DE-7200 CentrifugeDewatered

Fines

Effluent Feed

Proven in the FieldThe DE-7200 centrifuge is a proven alternative to cumbersome belt-presses or batch operated plate/frame presses. It now provides aggregate wash plant operators a high performance, low maintenance, operator free solution to handle by-product super fines. The centrifuge converts the pre-thickened solids from a clarifier, radial thickener or other solids consolidation equipment and dewaters them into a stackable and conveyable form at 75% solids ultimately eliminating the settling pond facility.

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Hi-Cap DewaTerinG sCreen

hi-caP DeWaTerinG screen

Dewateringprimarysandproducts toover90%solids

300TPHpermachine

Only10HPoperation

Over62sq.ft.ofavailablescreen surfacearea

Asphalt sand production Concrete sand production

HI-CAP Dewatering ScreenAchieving production rates of 300 TPH, per machine, our new proven technology delivers production sands (concrete, asphalt, mason etc.) to a superior dryness of more than 90% solids (by weight). This is accomplished by our W2 motors providing true high G-force linear motion coupled with high open area urethane screen surfaces. The HI-CAP machine offers more than 62 sq. ft. of screen surface area on a single unit. Nearly half of its urethane screen surface is open area, which is fundamentally critical for effective dewatering. The HI-CAP machine is typically fed by screw classifier product, tank classifier cell feed or large cyclone underflow.

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Hi-Cap DewaTerinG sCreen

linear moTion PrinciPle of oPeraTion

Asphalt sand production Brick sand production

A Derrick linear motion screen is equipped with two vibrating motors rotating in opposite directions. This dual motor configuration causes the screen frame to vibrate in a linear or straight-line motion perpendicular to the plane of the motors. Normally, the motors are positioned at a 50 angle with respect to the screen surface. This results in excellent forward conveyance of oversize particles, even when the screen frame is in an uphill position.

Depending upon the application, the screen frame can be positioned from +10 to -15. Maximum fluid capacity is achieved in the uphill position, causing the formation of a pool at the feed end of the machine. The head or pressure from the pool increases fluid throughput. The linear motion of the screen frame efficiently conveys the oversize particles out of the pool area where they are then dewatered and discharged.

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sanD proDuCTion sysTems

sanD ProDucTion sysTems

Sand Production SystemsClean aggregates specifications currently utilized within todays construction industry have set new standards for how these materials are generated. Derrick offers state-of-the-art flow sheets providing product quality in an efficient and cost effective system.

Our newly developed HI-CAP dewatering screen, coupled with unique cyclone and screening circuits can now provide unmatched cut-points currently being attempted by obsolete conventional hydraulic classifiers (tank and screw combinations). Specification sands such as concrete sand, asphalt sands, mason sands, AG-Lime and brick sands can now be produced and dewatered at dryness levels of 90-92% solids (by weight).

Depending on your needs, Derrick offers individual product units, multiple product generation modular systems, and complete turn-key packages.

Two Derrick MD 18 cyclones HI-CAP machine powered by two Derrick W2 motors

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sanD proDuCTion sysTems

sanD ProDucTion sysTems PrinciPle of oPeraTion

Specification Sands:

AG-Lime ConcreteSands AsphaltSands MasonSands BrickSands OtherSpecificationSands

Derrick high open area urethane screens (as fine as 75 microns) Materials consistently stackable and conveyable to stockpile

Sand Product

Sand ProductionSystem

Secondary orTercerary Screen

Primary Stone Product

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System Overflowto Ponds

CycloneFeed Pump

weT fine sCreeninG

rePulP WeT sizinG screen

Wash Trough

Spray Water

Oversize

Screen Panel

Undersize

Repulp ScreenThe Repulp wet sizing screen is the ideal machine for the production of a clean oversize material free of fines or undersize particles. As illustrated in the figure above, the Repulp screen is equipped with spray nozzles directed at one or more rubber-lined repulping or wash troughs. Highly efficient wet sizing and maximum removal of fines is accomplished by repulping and screening the material multiple times as it moves down the length of the screen surface. Spray water directed at the screen surface would result in accelerated wear and could also force oversize particles through the openings.

In fine wet sizing, undersize particles are transported through the screen openings by the fluid, normally water. Once all the water has passed through the screen surface, no more sizing takes place. Any remaining fines simply adhere to the oversize particles. The multiple repulping and rescreening steps possible with the repulp screen maximize the removal of fine particles. Multiple separation sizes or cut points are also possible by using a Repulp screen equipped with a split undersize hopper. A finer separation is made first, followed by a coarser separation.

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weT fine sCreeninG

belT scalPer anD sieve benD

Belt ScalperThe Derrick Belt Scalper utilizes a variable speed conveyor screen belt to transport solids off the machine without vibration. As solids loading increases, the variable speed motor allows the speed of the belt to be increased and additional fluid to be processed. The uphill pitch on the conveyor bed allows a fluid pool to form at the end of the belt scalper. The result is increased hydrostatic head which enables high flow rates to be easily processed. The Belt Scalper is intended to increase solids recovery from industrial and wastewater process flows and reduce wastewater treatment costs.

Sieve BendFar ahead of the competition, the Derrick Sieve Bend screen is designed to take advantage of Derricks unique urethane screen surfaces. The Derrick Sieve Bend screen features an adjustable angle design, open or full enclosures, and a variety of feed and outlet piping options.

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Belt Scalper Sieve Bend

Dry fine sCreeninG

Single Deck ScreenTwo Size Separation Capability

Double Deck Screenwith Hood Enclosures

sinGle anD Double Deck Dry screeninG machines

Dry Screening MachinesA wide assortment of single deck and double deck dry screening machines are available from Derrick. Each machine is custom engineered for the required duty and installation and comes complete with the appropriate feed box, product collection hoppers, and dust enclosure. The covers and doors on the dust enclosures, together with side openings on the vibrating screen frame, permit easy access for inspection or screen surface replacement. The lower deck screen surfaces on double deck machines can even be replaced without having to remove the upper deck screen surfaces. Compared with other types of vibrating screens, structural requirements are considerably less with Derrick screens since they transmit virtually no dynamic load to the surrounding support structure.

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Dry fine sCreeninG

Dry fine screeninG PrinciPle of oPeraTion

Scalp Screening

Feed

DischargeGrade Screening

Elliptical Screen Movement Conveys

Particle AccelerationSteep Screen Angle Thins Load Depth

Less Pitch Slows Depth

Shallow Angle Slows Load

Elliptical Screen Movement Retains

Highest Throughput of Fines in First Two Feet

Nearsize Screening Done Here

C.M.

The high frequency, low amplitude motion produced by Derricks complete line of vibrating motors produce a unique vertical-elliptical movement that quickly conveys oversize particles down the screen. This action produces a thin bed of particles, leading to increased capacity and efficiency. Single or multi-angle screen bed configurations are available, depending upon the separation goals and the amount of oversize and nearsize particles. If required, multiple cut points are easily obtained with various split hopper arrangements. Keep in mind that for high tonnage separations, it is usually more cost effective to use a combination of single and/or double deck Derrick screens than machines with three or more decks.

Derricks worldwide dry screening success has also been driven by its continuing development of advanced, non-blinding, screen surface technology. For example, materials with high moisture content that would normally blind other types of equipment are successfully screened using Derricks unique floating backing wire system.

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sCreen TeCHnoloGy

screen surfaces

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Phosphate Installation in RussiaUrethane Screens Sandwich (SWG) ScreensFloating Backing Wire Screens

High quality screen surfaces are vital to the performance of Derrick high speed screen ing machines. Derrick fabricates compatible screen panels for use on all models in its equipment line. A number of Derrick screen tensioning assemblies are also available. These greatly enhance the performance of our fine mesh and urethane screens.

Urethane ScreensWith openings as fine as 75 microns (200 mesh), the development of fine mesh, high open area, urethane screen surfaces is perhaps one of Derricks most notable contributions to the science of fine particle separations. With three to four times more effective open area than conventional urethane screens, Derrick fine mesh urethane screen surfaces will not blind with nearsize particles. And while all urethane screens are well known for their abrasion resistance, only Derrick urethane screen surfaces combine long life with capacity and performance rivaling that of conventional woven wire screens. Derrick urethane screen surfaces make all other screening technologies obsolete and old notions of low capacity, blinding, and high screen panel consumption can be discarded.

Floating Backing Wire The Floating Backing Wire system now makes it practical to screen materials that would otherwise be impossible to screen due to their tendency to blind or bridge the screen panel openings. The Floating Backing Wire system consists of trays holding narrow pieces of coarse woven wire just below the screen panel surface. As the screen frame vibrates, the Floating Backing Wire bounces up against the back of the screen panel and knocks loose any particles clinging to screen panel. Used successfully with damp solids and materials that tend to cling to the screen surface, Floating Backing Wire is the ideal solution for difficult screening problems.

Sandwich Screens The Sandwich Screen, which consists of two fine mesh screens supported by a coarser backing wire screen, is bound into a double fold, hook strip. Interference in the free openings is created by cross wires of the second screen. This layered effect prevents particles from lodging in the openings of the top sizing surface. The cut point is made by the combination of cross wires from both fine screen surfaces.

DerriCk CusTomer serviCe anD lab

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cusTomer service anD full-scale TesTinG lab

Sample Report

Wet Testing Lab Sieve Analysis RoomDry Testing Lab

Full-scale Testing Laboratory:

Testsconductedwithfull-scalemachinesWetanddrytestingfacilityNochargefortesting(sampleshippingcostsaretheonlyexpensetothecustomer)CustomerparticipationisrecommendedandencouragedTestsdetermineoptimumoperatingconditionsandproductspecificationsResultsobtainedinfull-scaletestsareduplicated in commercial plant (as long as test feed sample is representative)Uponcompletionoftestingyouwillbeprovidedfullanalysisincluding:sizeanalysis,mass balances, calculated efficiencies, operating parameters, along with stated objectives and comments (see Sample Report above)

We invite you to take advantage of our full-scale testing laboratory to determine the screening system best suited for your application. With our fully equipped facilities at your disposal, Derrick technicians will conduct complete screen tests on your product to determine optimum machine capabilities and efficiencies.

590DukeRoadBuffalo,NewYork14225Phone:(716)683.9010Fax:(716)683.4991

E-mail: info@derrickcorp.comwww.DerrickCorp.com

DC Agg CC - 2/3/2009 Copyright 2009 Derrick Corporation. All products indicated by trademark symbols are trademarked and/or registered by Derrick Corporation.

Derrick high frequency wet and dry screening equipment is recognized worldwide for its high capacity and superior separation efficiency. Well known for its unparalleled quality and serving a multitude of aggregate applications, Derrick Corporation stands ready to meet your particle separation requirements. Contact Derrick today and speak with one of our experienced product application engineers.

Derrick CorporationBuffalo Headquarters and Manufacturing Facility

Represented by:

conTacT informaTion