July 6, 2011
By Aggregates Manager Staff
KPI-JCI, a division of Astec Mobile Screens, expects its new multi-frequency screen to revolutionize the screening industry. With the combination of both conventional and high-frequency screen movements integrated, the screen is able to maintain the higher production rates of a PEP screen at a lower angle, while handling higher moisture content materials. Coarser material requires more amplitude and less frequency, while finer material requires less amplitude and more frequency. The multi-frequency screen combines both theories. By working at a lower operating angle, the overall height of the screen is less — making it safer to work on and operate.
Large filter press
Jingjin Filter Press Co.’s filter presses, now available in North America through Tons Per Hour, Inc., are said to be able to replace belt presses in nearly every application, eliminate settling ponds, and recycle more water than alternative methods. The company says its filter presses offer a higher quality of filtrate than a belt press, dramatically dryer solids, reduced handling cost, and no operator is required. The units boast capacities of up to 23 cubic yards of solids per cycle; up to 4.5 cycles per hour. Return on investment when replacing a belt press is said to be one year.
Next generation of screening
Metso, which manufactures the only triple-deck elliptical banana screen designed for the construction market, announced the pending release of its new Ellipti-Flo screening system at ConExpo-Con/Agg. While the banana screens are said to offer 40 percent more production on the same footprint as a typical incline screen, the new unit is expected to produce an additional 30 percent of production compared to the banana screen. Designed to handle separation of traditionally challenging material such as wet, sticky feed, the system also has high-load, bearingless exciters.
Martin Engineering says its new EVO Conveyor Guards allow workers to do their jobs with reduced risk and greater efficiency, while helping to ensure plant compliance with safety standards and regulations. The guards are self-supporting and feature a rugged modular design that installs on supplied angle-iron structure, eliminating the need to attach them to conveyor equipment.
Fast acceleration, quick cycle times
Case Construction Equipment expanded its F Series wheel loader product line with a new size class — the 1021F and 1121F. The 1021F features a 296-horsepower engine, a 5.5-cubic-yard bucket, a dump height of 121 inches, and an operating weight of 53,500 pounds. The 1121F, rated at 320 horsepower, has a 6.25-cubic-yard bucket, a dump height of 126 inches, and an operating weight of 60,800 pounds. Both models are said to provide fast acceleration, quick cycle times, and high production. Four power modes — Economy, Standard, Max, and Auto — allow operators to match engine power to the application. The new Case engines feature variable-geometry turbochargers.
Available in push-pull configuration
The H Series 621H, 623H, and 627H Wheel Tractor-Scrapers from Caterpillar use Sequence Assist and Load Assist to automate many of the operator’s most demanding tasks. When combined with Cat Grade Control, the new systems are said to unburden veteran operators and help less-experienced operators reach high productivity levels quickly. The 621H offers a push-pull configuration for the first time, which enables two scrapers to work together when loading, rather than requiring a push tractor. Each of the three models will be available with engines that meet US EPA Tier 4 Interim and EU Stage IIIB emissions standards. The 621H is a single-engine, open-bowl machine; the 623H has an elevating scraper and a single engine; and the open-bowl 627H has twin engines — one on the tractor and one on the scraper — and all-wheel drive. Capacities are increased to 24 cubic yards for the 621H and 627H. The 623H bowl maintains a 23-cubic-yard capacity, but the elevator is said to be stronger, more powerful, and easier to adjust.
Faster tire changes
Titan Wheel Corp.’s new Accelerated Change Technology (ACT) wheel is designed to allow service technicians to change or rotate the rear tires on a haul truck in less time. The company says the system enhances safety, reduces service technician fatigue, and increases profitability by reducing tire maintenance downtime. The wheel features a two-piece lock ring that releases the tire assembly from the wheel, allowing the inner dual wheel to simply slip over the outer wheel. The ACT wheel is said to save nearly 50 percent of the time previously spent changing tires.
Built with customer collaboration
John Deere’s new 755K crawler loader was built from the ground up through customer collaboration with company engineers. The loader features productivity enhancements and a new Interim Tier 4-certified diesel engine. Its design, track systems, and comfortable cab are said to make the machine quiet, comfortable, and easy to operate. Additional features include a V-pattern or joystick transmission control option, a viscous-mounted cab for noise suppression, a sealed switch module with keyless start, security mode with auto shutdown, a diagnostic monitor that provides machine condition information, color-coded service points for easy identification, fluid sampling valves, hinged belly pans, and improved access to maintenance areas.
‘Smart’ hydraulic systems
LiuGong says its new generation of intelligent crawler excavators — the 915D, 925D, and 936D — feature a computer-aided power-control system (CAPC) for greater operating efficiency, lower fuel consumption, and overall reliability. The ‘smart’ hydraulic system offers on-demand breakout power. At the touch of a button, the power boost feature instantly increases the excavator’s digging force up to 10 percent for 10 seconds, then resets back to normal functions. The CAPC automatically matches the excavator’s hydraulic output flow to the application. The 925D and 936D feature a no-time-limit heavy lift system that, when activated, increases hydraulic pressure to the attachment cylinders while simultaneously reducing attachment speed for better control during lifting operation. The D-Series’ new rigid x-type crawler car bodies distribute load stress throughout the frame.
New Interim Tier 4 excavators
Kobelco Construction Machinery America says its three Mark 9 excavators — the 181-horsepower SK260-9, the 197-horsepower SK295-9, and the 269-horsepower SK350-9 — offer operating weights ranging from 59,524 to 80,909 pounds, with digging depths between 23 feet and 24 feet, 10 inches. The excavators feature Kobelco’s Intelligent Total Control System, a new Economy power mode, and a new ROPS/FOPS cab. The company developed a selective catalytic reduction emissions solution for the Tier 4 Interim compliant units. A rear-view camera with a color monitor, rear work lamps, and swing flashers boost safety and productivity. Several configurations are available, including a long-reach model. Standard, high and wide, and heavy-duty undercarriage options are available.