May 1, 2012
Your complete guide to new and updated equipment and supplies in the aggregates industry.
By Kerry Clines, Senior Editor
Hydraulic, electric jaw plant
Metso says its new Lokotrack LT120 portable jaw crusher plant combines crushing performance and user-friendly design and is available in hydraulic- and electric-driven versions. The hydraulically operated version is powered by the new Caterpillar C13 engine; the electric-driven E-version can take energy from either an external power supply or from a 420-kV onboard diesel generator. The electrical system is said to be designed in such a way that it provides the same benefits in operation and maintenance as the hydraulic version.
The company says the plant is designed to be safe to operate, move, and service. The plant features a standard 8-cubic-yard or extended 12-cubic-yard feed hopper with sides that can be folded and locked hydraulically. All conveyors have emergency stop wires. Transport dimensions are: 52 feet, 6 inches in length; 9 feet, 10 inches in width; 12 feet, 10 inches in height; and a weight of 57 tons. The extended version weighs 63 tons.
The LT120 plant is built around Metso’s C120 jaw crusher, which features a long, aggressively directed stroke and a 75-inch fixed jaw die. A large 34-inch by 47-inch feed opening and aggressive cavity cross section are said to provide high performance and reduced ratio. The 200-horsepower jaw has an operating speed of 230 revolutions per minute, an operational weight of 57,300 pounds, a closed-side setting that ranges between 2 3/4 inches and 8 inches, and capacity ranges between 240 and 595 short tons per hour. The jaw is said to be easy to install because of its compact design, and it can be mounted in multiple ways onto an existing or new structure. Economy and low fuel consumption are secured by using flywheels of high inertia and optimal revolutions per minute. The jaw features optional composite flywheel guards for quick, safe access to all service points.
W.S. Tyler says its new F-Class vibrating screen minimizes structural vibration, delivers a consistent stroke, and, with the right media, virtually eliminates blinding and pegging. The screen features an advanced eccentric shaft design supported by four high-performance, double spherical roller bearings. According to the company, the double eccentric shaft creates a constant positive stroke that handles material spikes without losing momentum. As the eccentric shaft turns, the screen body is forced to follow the shaft movement. While it travels upward, the counterbalance weights move in the opposite direction, creating an equal force to that generated by the body. As a result, the forces cancel each other out, allowing multiple screens to be placed side by side, reducing investment in additional structures. The design is said to keep noise emissions low for a quieter system and reduced overall plant noise. The screen’s continual circular screening action produces a constant, optimized G-force. The unit can process up to 5,000 tons per hour.
Two-stage portable crusher
The new JCP 2238-38 two-stage portable crushing plant from Telsmith, an Astec Industries company, includes a J2238 jaw as the primary crusher and a C38 cone to complete final crushing after sorting through the included screen. The self-contained, electric-drive, portable crushing unit can be moved with minimal disconnection. The jaw features push-button hydraulic adjustment, automatic tramp iron relief, and remote control hydraulic chamber clearing, and can handle up to a 21-inch quarried stone feed. The company says the cone is capable of processing in excess of 250 tons per hour and comes with standard features such as hydraulic relief and clearing, dynamic adjust, and hydraulic lock for low maintenance with minimal disassembly and quick adjustment under load. The optional anti-spin system prevents head spin.
Tackles heavy applications
Kobelco Construction Machinery America has a new addition to its Mark 9 excavator family — the SK485. The new machine features upgraded intelligent hydraulics, a new Economy power mode that is said to deliver 15-percent better fuel efficiency, a Tier 4 Interim Hino engine equipped with cooled exhaust gas recirculation emission technology, a new ROPS/FOPS cab with a larger work environment, and a low engine cover and standard rearview camera for improved visibility. The 345-horsepower machine has an operating weight of 111,774 pounds and a dig depth of 25 feet, 7.5 inches. Additional features include swing flashers and step extensions.
High productivity, low fuel consumption
Terex Corp. says its new TA400 Generation 9 articulated truck is designed to keep productivity levels high, fuel consumption low, and cycle times short. The machine boasts a 444-horsepower Tier 4 Interim-compliant Scania DC13 engine with a maximum torque of 1,548 foot-pounds at 1,350 revolutions per minute and a fully automatic Allison transmission. Additional features include a maximum payload of 41.9 tons, a heaped capacity of 30.3 cubic yards, dual retarded systems, transmission retarder and exhaust brake, permanent 6 x 6 all-wheel drive, and equalizing rear suspension. The service points are designed for quick and easy access to reduce downtime. The electronic-assisted hood raise and fully tilting cab simplify access to major components and ground-level service points. The truck is equipped with computerized systems that communicate with each other through a CAN-bus system to ensure everything is running at peak efficiency.
Superior breakout, lifting forces
Volvo Construction Equipment says its new G-Series L60G, L70G, and L90G middle-weight wheel loaders feature loader arms with patented Torque Parallel linkage for superior breakout and lifting forces. The machines meet Tier 4 Interim emissions requirements and are fitted with a six-liter, six-cylinder, turbocharged V-ACT (Volvo Advanced Combustion Technology) off-highway diesel engine, which features cooled gas recirculation and a particulate filter with active regeneration. The loaders produce between 161 and 173 horsepower and provide high torque at low engine speeds. The L90G is said to feature a 23-percent increase in lifting force and 19-percent improvement in breakout force. The company says the machines come with advanced electronic monitoring diagnostics designed to prolong machine life, enhance uptime, and maximize productivity.
A new 300-ton-per-hour tracked mobile cone crusher from Kleemann, a Wirtgen company, is now available in North America. The Mobicone MCO 11 features a 44-inch-diameter cone crusher as its core for high-performance secondary or tertiary crushing. Its 15.7-cubic-yard feed hopper is designed for direct feed from a primary crusher or wheel loader, and can accept feed of up to 10 inches by 10 inches in size. A variable-speed drive controls material flow from hopper to crusher via a solid rubber belt that is 40 inches wide. It’s fed by a vibratory feeder with special wear sheets that helps prolong feed belt life. The feed conveyor can be retracted for servicing the cone or for transport. The crusher is driven by a 270-horsepower motor and is mounted on rubber supports to reduce vibration. A probe control ensures the crusher is choke-fed. An extra-wide discharge conveyor belt moves product to screen or stockpile, and can be elevated to increase stocking capacity. The unit is 55 feet, 9 inches in length; 11 feet, 2 inches in width; 105,800 pounds in weight; and feed height is 13 feet, 11 inches.
New screening approach
W.S. Tyler says its new Pro-Deck System takes a new approach to screening by implementing an analysis and modification strategy in processing operations to maximize screen productivity and minimize wear by selecting the appropriate type of screen media. This consultative approach is said to result in a fully optimized screening process for greater efficiency and productivity, as well as less unscheduled maintenance and extended screen life. Pro-Deck implements a customized approach and evaluates material characteristics, the current functioning of the plant, and final output qualities to determine the best mix of screen media for each individual operation. The system is said to help eliminate blinding, pegging, premature wear, and unscheduled downtime as well.
Sets new fuel standards
Case Construction Equipment says its new CX470C full-sized excavator sets new standards in fuel efficiency, productivity, improved serviceability, and operator comfort, while achieving Tier 4 Interim certification. The 362-horsepower machine is available in long undercarriage, retractable undercarriage, and mass excavator models with operating weights ranging from 105,300 to 108,600 pounds. It is designed for heavy loads and larger buckets up to 4.13 cubic yards in size. The excavator features Case Intelligent Hydraulic System technology that is said to reduce total fuel consumption and improve performance. The machine provides 5-percent faster cycle times and 6-percent more lift capacity than the previous model. With its standard arm length of 11 feet, 1 inch, the excavator has a maximum dig radius of 39 feet, 4 inches; a maximum dig depth of 25 feet, 4 inches; and a dump height of 25 feet, 5 inches. Standard arm digging force is 42,490 pound-feet; standard bucket digging force is 55,530 pound-feet.
Tier 4 final certification
Caterpillar Inc. says its new Tier 4 Final 777G off-highway truck offers next generation transmission control with its Advanced Productivity Electronic Control Strategy (APECS), which provides greater productivity at better fuel rates with torque shift management that allows the truck to carry more momentum up grades. The Tier 4 Final engine requires the use of ultra-low sulfur diesel fuel and low ash engine oil, but requires no additional maintenance or operator input. Additional features include enhanced braking and traction control, hydraulic oil-immersed disc brakes, a traction control system that differentiates between tire spin and high-speed turns, wider cab access with hand rails, 50-percent lower noise levels in the cab, and a combination of radar and cameras for enhanced safety and object detection. Maintenance is convenient with ground-level service centers for both electrical connections and fluid fill.
Decreases cost per ton
Buffalo Wire Works says its new Clean PFX screens are engineered to decrease cost per ton through effective use of available deck screening surface area, greater specification produced per unit time, increased screen life, newly innovated polyurethane strips, and wires that vibrate independently from one another at different frequencies preventing material build up. The screens are said to solve the toughest and most severe screening problems while maintaining materials in spec and reducing blinding and pegging. An extensive range of openings is available, and no modification of the crowned deck is required. The screens are available in several models for different applications — Clean PFX-M Series, Clean PFX-N Series, Clean PFX-L Series, Clean PFX-Harp, and Clean PFX-Clean Slot.
Lightweight, powerful breaker
Atlas Copco Construction Equipment says its new HB 4100 heavy hydraulic breaker has a service weight of only 9,039 pounds (designed for carriers in the 88,185- to 154,324-pound weight class), but is as powerful as much heavier breakers. Improvements to the breaker include a guide system that makes the breaker more stable and resilient, a new cover plate for the retaining bars that offers more protection in the lower part of the breaker, and increased wear protection at the bottom of the case. The breaker is suitable for secondary and primary rock breaking.
Maximizes haul truck capacity
Philippi-Hagenbuch says its line of Autogate Tailgates is designed specifically as an avenue to increase haul capacities by up to 20 percent, while also providing added safety and extended tire life. The line of tailgates includes models suited for both articulated and rigid frame trucks and is said to be effective for any material — hard and rocky or liquid. The company constructs each tailgate to the specific spec of each model.