AGGREGATE PROCESSING

Process Solutions FOR CRUSHED STONE, SAND & GRAVEL

DDC-SIZERSDDC-Sizers are an evolution of the Double Roll Crusher.

McLanahan Corporation has been manufacturing this low

profile, compact crusher for over 50 years, having first

introduced them to the brick and clay industry to handle wet,

sticky feeds. Use of slow

roll speeds allow the

material to be grabbed

more efficiently and

differential roll speeds

impart a self-cleaning

action on the rolls for

sticky feeds.

Tramp iron protection is provided via a torque controlled

coupling located between the motor and reducer. Direct

hydraulic drives are also available for extremely tough

applications to reduce shock loading. One roll is

adjustable to control product size as the rolls wear

over time.

Since the McLanahan DDC-Sizer incorporates heavy-

duty compact drives, anchoring the unit to the foundation is

not necessary. Therefore, it can be mounted on tracks and

rolled out from under hoppers or chutes for easier access

during normal maintenance or to remove a piece of

uncrushable material.

IMPACT FEEDER-BREAKERSImpact Feeder-Breakers are a new solution for in-pit

primary crushing. An easy to use, easy to move alternative

to traditional primary crushers, they can handle feed

sizes up to 48" (1200mm) with capacities to 1,200 STPH

(1090 MTPH), eliminating hydraulic rock breakers. Supplied

with either a skid or powered/non-powered crawlers,

expensive foundations are eliminated. Material is dumped

directly onto the drag chain and flight bars pull material into

ROLL CRUSHERSRoll Crushers are an ideal machine to minimize “fines”

generation and/or to handle wet, sticky materials that would

be impossible for traditional primary crushers to handle

efficiently. The combination of impact compression and

shearing action breaks the material along its own inherent

fracture planes. McLanahan Roll Crushers use innovative

tramp relief systems (no shear pins or gas cylinders) so that

you don’t have to stop production if uncrushable material is

in the feed.

AVAILABLE IN SINGLE, DOUBLE, TRIPLE AND QUAD ROLL CONFIGURATIONS DEPENDING UPON THE APPLICATION REQUIREMENTS.

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Crushing RockWe specialize in crushing low silica materials such as limestone, gypsum, trona, salt, coal and more.Our crushing equipment is designed to minimize “fines” generation while efficiently handling wet,sticky feeds. As a world-wide leader and innovator in the design and manufacture of this type of

equipment, you can rely on us to deliver the best in quality, service and experience.

the crushing chamber. Excess fines are minimized since

already-to-size or just-crushed material falls to the deck

and is pulled under the rotor.

Product sizes such as a nominal 12" (300mm) can be

achieved or the unit can be adjusted to make other products

such as rip-rap.

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ROTARY SCRUBBERSRotary Scrubbers can be used as a primary washing

device to remove loamy, soluble clay completely or

as a pre-washing device prior to crushing, screening and

additional washing equipment. These units can be fitted

with either single or

double shell screen

extensions to dewater

and separate materials.

COARSE MATERIAL SCREW WASHERSCoarse Material Screw

Washers are used to

remove light, loamy

clays, crusher dust

and other soluble

waste fractions from

feed materials. Each

Coarse Material Screw

is designed for your

application by adjusting the number of paddles (20, 40 or all)

and the operating slope. Rising current helps lift waste

fractions to the water surface where they are then floated

over the back weir.

AGGREGATE CONDITIONERSAggregate Conditioners are generally used as a

pre-washing device (prior to a Sand Classifying Tank or

Wash Screen) to improve the classifying ability of the tank

or for easier removal of waste fractions when screening.

While similar in appearance to Coarse Material Screw

Washers, they differ in processing technique. Aggregate

Conditioners do not have a weir overflow. All material and

water fed into the unit must be discharged out of the bottom

of the box, so it

is not practical to

discharge material

onto a conveyor.

Trommel Screens orTrommel Scrubbers offer an efficient way to remove soluble clayswhile screening materialat the same time.

LOG WASHERSLog Washers are designed to remove tough plastic clay,

soft rock or other friable waste. Using replaceable, abrasion

resistant paddles fixed to a twin shaft design ensures

that an aggressive washing action breaks down even the

toughest clay. We always

recommend that a wash

or rinse screen be used

after the Log Washer to

ensure the final removal

of any coatings.

The new standard of Log

Washers, the McLanahan

X-treme Log Washer, can

handle capacities up to 500 STPH using reinforced paddle

bases, larger drives and lower operating slopes.

Scrubbing RockConfused about how to clean your rock efficiently AND get the highest return on investment?

Dealing with a tough clay or do you have a water soluble crusher dust coating your rock? Let us work with you to determine the best solution using the most cost effective equipment and processing techniques. One type of equipment does not fit all applications, that’s why

we offer more choices than any other manufacturer.

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There are two basic styles of Fractionated Sand Plants

(Recipe & In-Line Blending) both pioneered in North

America by McLanahan personnel, that allow producers to

maximize yield and produce very accurate gradations in

primary and specialty products. Every grain of sand has the

potential to be used in a higher priced end product.

RECIPE SAND PLANTSThe Recipe Sand Plant is the most versatile method for

producing sand. Utilizing equipment, including Cyclones,

Hydrosizers™ and Dewatering Screens, the systems

produce discrete sand fractions for storage in bins. Based

upon the desired end

product, feeders at the

bottom of these bins

meter the exact quantity

to meet the most stringent

gradations. This type of

system allows you to

produce a myriad of

construction sands and/

or specialty sands.

SAND-MANAGER® CLASSIFYING TANKSSand-Manager® Classifying Tanks provide a simple method

to remove excess water, slimes or undesirable grain sizes

from natural or crushed sand feeds. By separating the sand

fractions and reblending them according to a computer

program, you can make multiple products simultaneously

from the same feed. Products from the Sand-Manager®

Classifying Tanks are dewatered with Fine Material Screw

Washers or Dewatering Screens. With low initial cost and

easy operation, this system

offers advantages to producers

primarily interested in making

concrete and mason sands.

Sand Pro

Advantages:Highest yields,

unlimited numberof products and

maximum return oninvestment.

There are many ways to make sand p Choosing between Classifying Tanks, Attr

Screw Washers, etc. can be difficult. However and experience to help you find the

IN-LINE BLENDING SAND PLANTSThe In-Line Blending Sand Plant offers the operator many of

the same advantages as the Recipe Sand Plant, but at a

reduced investment since storage bins are not required.

After the sand is fractionated, a PLC based algorithm

controls the ratios by which the fractions are blended

“on the fly”.

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SCREW WASHERSScrew Washers are an effective way to wash, dewater,

deslime and control the bottom end of the gradation. A

large pool area provides maximum retention of desirable

product sizes, while a rising current system floats off the

excess “fines”.

Advantages: Simple to operate, limited maintenance and low power consumption.

ULTRA SAND PLANTSSystems for natural and manufactured sands utilizing

Cyclones, Dewatering Screen(s), Sumps and Pumps are

designed to control the bottom end of the sand spec

while producing the driest possible product. Single and

multiple product and modular plants available.

Advantages: Improved yield, highest production rate,drier product and modular design.

SAND SEPARATOR SYSTEMSSeparator™ Systems retain more of the critical finer

fractions instead of sending them to settling ponds.

This retained tonnage moves across your scale as a

saleable product. In addition, sharper classification versus

conventional methods, such as Screws, can result in

improved sand equivalency (SE). The Separator™ is the original

controlled underflow Cyclone. In 1972, this technology was

patented with the

design and expertise

owned by McLanahan.

DEWATERING SCREENSDewatering Screens were introduced in the late 1970’s by

McLanahan personnel and quickly became the standard in

the mining industry. Dewatering screens offer multiple

advantages for construction and specialty aggregate

producers, including a dry “drip-free” product that other

types of equipment cannot provide. Dewatering Screens are

used in many applications including dewatering products

from Sand Classifying Tanks and Screws, or within a system

such as the Recipe Sand Plant.

ocessing

Advantages: High capacities,multiple products, betterstockpile management, low power consumption, low maintenance and

driest product.

products. Which one is best for you? ritioners, Scrubbers, Dewatering Screens,

r, you can rely upon our 100+ years of history e best solution for your application.

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COARSE MATERIAL SCREWSCoarse Material Screws are not only an effective way to

remove a light, loamy clay or crusher dust, they also remove

floating vegetation such as sticks and twigs.

LITES-OUT™

Lites-Out™ Systems – either as a stand-alone system or as

an add-on to your existing Sand Classifying Tank – will

remove lignite and other low gravity contaminants from

sand. This unique, gravity based process does not require

the addition of any chemicals or heavy media such as

Ferro-Silicon or Magnetite to achieve separation. This

same technology can be used for soil remediation and

construction debris applications.

ULTRA CLEAN ATTRITION SCRUBBERSThe Sand Stabilization Process (SSP) uses proven mineral

processing techniques to effectively deal with deleterious

materials affecting Durability

and SE’s. By creating an

environment of high shear,

coupled with state-of-the-art

dewatering and desliming

technologies, the process is

a significant improvement

over Screw/ Blade-mill based

processes which are a current

industry standard.

McLanahan uses proven technologies in innovativeways offering customized transportable (mobilesystems) for primary sand production, classification,fines recovery, environmental projects and effluenttreatment.

Mobile Systems

Contaminant RemovalIs your pit contaminated with lignite, coal or shale? Now, with our help, you can turn an undesirable pit into a money-maker, capture new markets and reduce complaints.

With conventional equipment or specialty systems such as the Lites-Out,™

we are able to solve any problem.

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Water Management

Fines RecoveryAs an innovator in the industry, we have developed the largest range of fines recovery equipment

available. Our customized systems recover usable product and reduce environmental liability.

ULTRA FINES RECOVERY PLANTSRecovery of +400 mesh (38 micron) “fines” as a conveyable, stackable product is cost-effective using theUltra Fines Recovery System (UFR). Featuring field provenequipment, this system provides the finest size fractionrecovery available without the use of chemicals.Installation costs are kept low due to the modular construction. Start-ups are faster with the integrateddesign.

Advantages: no chemical or polymers needed, modulardesign, non-plugging cyclones.

SEPARATOR SYSTEMSRecovery of +200/325 mesh (75/45 micron) material usingthe Separator™ System is the simplest, most cost-effective, way of recovering sellable “fines” fromwaste streams. Systems feature the original Separator™

(either single or multiple units) coupled with the rubber lined Pump to provide trouble free, low maintenance operation. Recovered material can be selec-tively blended back into Screws, road base mix or stock-piled as a stand alone product such as mortar, tile, cable

fill, flowable fill,AgLime, etc.

THICKENERSThe McLanahan designed High Rate Thickener is simple indesign and operation with specific benefits for today’s producers. After removing usable materials from the effluentstream, Thickeners recover immediately re-usable processwater adjacent to the plant site. The availability of water atthe point of use substantially reduces pumping HP. Becausethe volume of the Thickener’s effluent is small, there’s noneed for large settling ponds and process water ponds totake up valuable real estate and other resources. This, thenreduces water consumption and mitigates environmentalissues.

McLanahan is a leader in providing complete effluent treatment/water management solutions.

Additional Systems

Additional Products

AGGREGATE SWEEP SAMPLERHSS Sampling, a Division of McLanahan Corporation, hasbeen designing and supplying Sampling Systems world-wide since the mid-1960’s. HSS Aggregate Samplers willprovide you with:

• An automatic and economical way to easily, safely and

accurately collect samples from your moving conveyor belt

• Increase employee safety by eliminating the need for“grab” samples

• Save time and money by keeping your conveyor on the move

• Reduce out-of-spec product piles and increase accuracy of sampling analysis

OTHER SYSTEMS• Soil Remediation, lead shot and bottom ash separation

• Classifying in Millings Circuits to prevent over grinding in mineral sands, iron ore and coal

• Wash circuits for removal of reagents (e.g. Phosphateacid wash circuits)

Three Samplers Installed To Collect A Road Base Material.

Guards are recommended for safe operation of equipment. In some photos, safety guards may not be shown. PS-2102

AGGREGATE PROCESSING

PUMPSThe range of horizontal spindle, centrifugal slurry pumps are ruggedly designed for the most severe duties. Field replaceable, wet-end linings are available in premium rubber, white food grade rubber, nitrile and high chrome iron. Verticalconfiguration is available on special order, and vortex flow impellers are availablefor fibrous materials.

OTHER PRODUCTS• Stabilized Road Base Mixers• Pugmill Mixers

WORLD HEADQUARTERS 200 Wall Street, Hollidaysburg, PA 16648 USA Ph: +1 (814) 695 9807 Fax +1 (814) 695 6684 E-mail: sales@mclanahan.com

Tennessee 585 Airport Road, Gallatin, TN 37066 USA Ph: +1 (615) 451 4440 Fax +1 (615) 451 4461 Email: sales@mclanahan.com

Florida 2920 Barneys Pumps Place, Lakeland, FL 33812 USA Ph: +1 (863) 667 2090 Email: polymers@mclanahan.com

Iowa 800 First Avenue N.W., Cedar Rapids, IA 52405 USA Ph: +1 (319) 365 0441 Email: sales@mclanahan.com

Australia 16 Callistemon Close, Warabrook, NSW 2304 Australia Ph: +02 49 248 248 Fax +02 4926 2514 Email: sales@mclanahan.com.au

United Kingdom 11 Warren Rise, Frimley, Surrey, GU16 8SH UK Ph: +44 (0)7407 344757 Email: infoUK@mclanahan.com

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