Rock Products - The Leading Voice of the Aggregate Industries.

ConExpo-Con/Agg Revisited


Product Introductions By Manufacturers From All Over The World Were The Keys To Success for North America’s largest Construction-Equipment Show.

By Mark S. Kuhar and Josephine Smith

This is the first in a series of articles focusing on the equipment and technology seen at the ConExpo-Con/Agg show in
Las Vegas March 22-26. – Ed

This year’s ConExpo-Con/Agg 2011 show attracted nearly 120,000 registered attendees and the show was the global construction-industry gathering place for the year, and the largest gathering in North America since 2008 for the construction, construction materials and fluid power/power transmission/motion control industries. The show was held at the Las Vegas Convention Center.

Attendees said they were at the show to examine the newest equipment, product technologies and innovations to help them prepare for future business. Exhibitors cited the high quality of customers and reported strong purchases and sales leads to new as well as existing customers.

Following are some of the products and services exhibited at the show.

9-L Engine
Cummins QSL9 Tier 4 Final engine is capable of meeting near-zero emissions levels while retaining the higher output (up to 400 hp/298 kW) and faster engine response demonstrated by the Tier 4 Interim model. An ultra-clean after treatment system, combining the Cummins Compact Catalyst with Selective Catalytic Reduction (CCC-SCR) helps the newer model achieve 2014 EPA Tier 4 Final and EU Stage IV standards. The CCC-SCR system is specifically configured to provide a more compact and flexible equipment installation for Tier 4 Final. The CCC, previously used for ratings below 174 hp (130 kW), is scaled-up in size for the 9-liter platform. When combined with SCR, NOx reduction between aftertreatment and cooled Exhaust Gas Recirculation on the engine is precisely balanced. Furthermore, the QSL9 continues to equal the power productivity of higher-displacement engines with performance-enhancing systems such as Cummins Variable Geometry Turbocharger (VGT) and Xtra-High Pressure Injection (PI) fuel system. Cummins Inc., www.cummins.com

Excavators
Hitachi introduced a new crop of orange excavators at ConExpo-Con/Agg: the ZX290LC-5 and the ZX870LC-5. These two models represent the first two waves of Dash-5 Excavators to roll out this year. Models ZX250LC-5, ZX290LC-5, and ZX350LC-5 will be the first to arrive at dealers. Later this summer, ZX470LC-5, ZX670LC-5, and ZX850LC-5 will be launched. By incorporating customer-driven features, the excavators provide superior durability and productivity, while keeping operating costs low. Thanks to optimized hydraulics, the excavators have improved arm and bucket digging force, lift capacity, swing speed and torque, engine horsepower, and drawbar pull (varies by model). The ZX250–ZX350 Dash-5s have an extended frame housing the updated cooling components and Interim Tier 4 (IT4) engine. The IT4 Isuzu cooled EGR engine platform is less complex to maintain than selective catalytic reduction systems while delivering the productivity, fuel efficiency, and reliability customers have enjoyed with Tier 3 models. Hitachi, www.hitachiconstruction.com

Modular Screens
Major Wire’s new 1-ft. x 2-ft. (305 mm x 610 mm) Flex-Mat 3 Self-Cleaning Polyurethane Modular screen media panels fit virtually any flat-surface screen deck. Therefore, screening operations using traditional 1-ft. x 1-ft. and 1-ft. x 2-ft. polyurethane and rubber panels can increase their existing screening capacity and in-spec material throughput up to 50 percent. Screening operations can choose between snap-, step-, pin- and grooved-types in opening sizes of 30 mesh, or 0.020 inches, up to 1-1/2 in. (30 mesh, or 0.5 mm,to 38 mm). Each new Flex-Mat 3 Modular panel increases total screen media open area by 4.6 percent when compared to using two 1-ft. x 1-ft. panels to cover the same screen deck area. No screen box changes are necessary to switch to the larger panels. Major Wire Industries Limited, www.majorwire.cc.

Skid Steer Tire
Michelin unveiled their newest extension of its radial line for skid steers, the BibSteel Hard-Surface tire, at ConExpo-Con/Agg. The radial joins the Michelin BibSteel All-Terrain tire as part of the compact line offerings that deliver increased traction and durability. The hard-surface tire delivers all of the same features as the all-terrain tire with a tread design specifically suited to provide excellent performance and maneuverability. Three key benefits to the new radial are that it retains the proprietary rubber compound that delivers longevity, it has all-steel casing and crown plies for durability, and it features a rim guard and better sidewall impact and puncture resistance. The BibSteel Hard-Surface radial tire will be available in the second quarter of 2011 in sizes 10R16.5 (265/70R16.5) and 12R16.5 (305/70R16.5).
Michelin North America Inc., www.michelinag.com

Inclined Screens
Terex Simplicity DM Series Inclined Screens are built to fit existing structures and individual customer needs. The dual 140 mm mechanism is an exceptionally tough design, which provides long bearing life in heavy-duty applications and high-speed fine screening applications. Two and three deck models in sizes ranging from 6 ft. x 20 ft. to 8 ft. x 24 ft. are available and can be customized to customer needs. Single piece, continuously welded decks are Huck fastened to extra deep corner supports and rugged steel side plates for a box-type structural strength that is extremely durable. To add toughness to the entire screen, corner support ribs extend full height for extra rigidity in the side walls. Terex, www.terex.com

Tracked Excavators
The new Volvo Tier 4 Interim-certified EC340D, EC380D and EC480D tracked excavators are low on emissions and maintain high productivity. The three D-Series heavyweight machines, ranging in weight classes between 75,000 – 111,800 lbs., meet the strict requirements of new EPA emissions legislation. Built for heavy production duties, the D-Series deliver dependable power with high torque, along with lower emissions, fuel consumption and noise. These machines have a turbocharged, high pressure, direct injection Volvo diesel engine that offers maximum power of 279 hp (208 kW) for models EC340D and EC380D, and 343 hp (256 kW) for model EC480D. All three models feature an automatic idling system that reduces engine speed when the levers and pedals are not activated – aiding fuel efficiency and lowering external noise. Additionally, when only a single function is being used, the two-pump hydraulics system combines the flow of both pumps for quick cycle times and greater productivity. Volvo Construction Equipment, www.volvoce.com

Pelletizing Disc
The new Haver Pelletizing Disc efficiently converts wasteful fines into a transportable and marketable pelletized product. The fines are mixed inside the disc (up to 25 ft./7,500 mm in diameter) with a binder, such as bentonite, and an additive that adheres to the material. As the disc rotates at up to 10 rpm, the materials agglomerate into salable pellets consistently sized between 0.35 and 0.63 in. (9 and 16 mm) in diameter at up to 150 tph. According to W.S. Tyler, the Haver Pelletizing Disc minimizes recirculation loads typical of traditional pelletizing discs by up to 20 percent, and reduces energy costs up to 5 percent through its direct-drive technology. To achieve these large efficiency increases, the discs are engineered so operators can automatically adjust sidewall height between 22 and 35.4 in. (560 and 900 mm) during operation at a rate of 0.04 in. (1 mm) per second – a patented feature new to the industry. W.S. Tyler, www.wstyler.ca

Surface Crawler Drill Rigs
Atlas Copco’s new PowerROC series of surface crawler drill rigs utilize the COP logic drilling control system to adjust drilling parameters in real-time and help the operator continue drilling straight holes. More operational savings are provided by the hydraulic cylinder feed system, which employs a rigid aluminum feed beam with precise feed force for longer drill steel life. The PowerROC series of tophammer surface drilling rigs were designed for use in aggregate and limestone quarries, and construction applications. The T25, T30 and T35 address hole quality by means of the optional 3D hole inclination device located in the operator’s cabin. The instrument controls hole depth, as well as contributing to accurate alignment control while collaring. The PowerROC rigs use COP 1240, 1640 or 1840 rock drills to deliver 2-in. to 4-1/2-in. hole diameters at a maximum hole depth of 69 ft. (21 m) to 82 ft. (25 m).
Atlas Copco Construction & Mining, www.atlascopco.us

Earthmover Tires
The V-Steel Rock E-Premium (VREP) off road tire features trapezoidal blocks with circumferential grooves that maximize wear resistance while minimizing internal friction and uneven wear. The tire is specially designed for 100-ton class earthmovers. The VREP minimizes heat generation over a longer lifetime in heavy-duty mining operations. According to Bridgestone Americas Tire Operations, Off Road Division President Shawn Rasey, “The VREP tire gives you extended tire life resulting in a lower cost per hour and lower replacement costs.” Furthermore, the tire has an innovative lug arrangement that increases overall stability and riding comfort of the operator. The two-stage lug design helps to absorb the energy of shifting blocks, thus minimizing block wear. The VREP tire is currently available in size 27.00R49. Bridgestone Americas
Off Road Tire, www.bfor.com

Impact Crushers
The MR 110 Z EVO and MR 110 R EVO, and the MR 130 R EVO and MR 130 Z EVO models are part of the Kleemann EVO series of track-mounted, mobile impact crushers. According to the company, the new, highly efficient material flow concept of the EVO models eliminates all restriction to the flow of the material throughout the entire plant. For instance, system widths of the feeder troughs and grizzly improve material flow through the opening of the crusher. The independent and effective vibrating double-decker pre-screen improves the EVO models’ cost efficiency. Additionally, larger screening units allow EVO models to deliver higher overall tonnages of between 350 to 450 tph (MR 110 EVO and MR 130 EVO, respectively). Another great improvement to this line of impact crushers is the new touch screen control unit, which allows the operator to run crusher and diagnose faults with a user-friendly control screen.
Wirtgen America Inc., ­www.wirtgenamerica.com

Medium Heavy Duty Truck
The Mack Granite Medium Heavy Duty (MHD) truck is designed to meet the needs of customers who don’t need all the specs that Granite models provide to get the job done. Curtis Dorwart, Mack vocational products marketing manager states, “Our new Granite Medium Heavy Duty delivers just the right amount of Mack’s legendary strength, durability and reliability, along with valuable weight and cost savings.” The Granite MHD is available in both axle-forward and axle-back configurations. The truck is powered by a Cummins ISL9 EPA 2010-certified engine and is offered with an Eaton manual or Allison automatic transmission.
Mack Trucks Inc., www.macktrucks.com

Star Screen Insert
Now available in the U.S. market, the star screen insert allows Doppstadt SM 720 and 720K trommels to maintain high throughput. The trommels can quickly convert into a star screen by simply removing the existing drum and replacing it with the star screen insert. Wet, clumpy organic material with moisture content as high as 60 percent or more can continue to be processed, with throughput results as much as 50 percent higher than screening through a drum. The star screen insert allows customers to extend the flexibility of their existing SM 720 trommel throughout any season and conditions. The star shape of the shaft is elliptical, rather than conventionally round, which aids dramatically in shaft cleaning. Doppstadt will be releasing a star screen insert compatible with the SM 617 and SM 726 trommels later this year.
DoppstadtUS, www.doppstadtus.com