Your complete guide to new and updated equipment and supplies in the aggregates industry.

By Kerry Clines, Senior Editor

Washes aggregate using less water

W.S. Tyler says its new Hydro-Clean washing unit cleans aggregate while reducing water consumption by up to 75 percent over traditional log washers. The unit uses high-pressure nozzles rotating at 90 revolutions per minute to spray up to 90-percent recycled water on material with pressures up to 2,900 pounds per square inch. Its compact size and weight allow it to operate at lower costs than traditional washing systems.

The washing unit removes silt and clay particles as small as 63 microns and can process up to 400 tons per hour, depending on model size and application, according to the company. Where a traditional washing system can require up to three screens along with a log washer or screw, the Hydro-Clean unit requires only one additional wash screen for discharged materials.

Dirty material is fed via a hopper to a vertical washing drum where high-pressure nozzles mounted at the top rotate and spray the material with water, breaking up agglomerates and cleaning the particles of stubborn material. As material travels down the drum cylinder, turbulence in the drum creates additional scrubbing and abrasive forces that enhance the cleaning process. The high-pressure streams of water are injected into areas of the rock that are difficult to reach, resulting in a cleaner product. Washed material exits onto a discharge conveyor that leads to a standard wash screen, which removes any remaining dirt or clay. The resulting dirty water flows through polyurethane screen mesh in the sides of the washing drum and is collected by a waste water pipe, which sends the water to a treatment system.

The Hydro-Clean uses very little water and power. According to the company, water consumption ranges from 27 to 211 gallons per minute, depending on application and model size; and power requirements are no higher than 300 horsepower (225 kW) on the largest model. The unit is available in four model sizes that produce 20 to 400 tons per hour, depending on the application.

Larger screening area

Sandvik says its new QE440 scalper boasts 40 percent more screening area than its predecessor the QE340. The machine’s two stockpiling conveyors are wider and higher, to handle increased production capacity and larger stockpiles. The unit features a total scalping area of 18 by 6 feet/16.5 by 6 feet, is capable of being fed by large crushers, and is fully tracked for on-site mobility. Other features include a heavy-duty crusher-type chassis, global aftermarket support with standard stock parts, fuel economy, low operating costs, and massive stockpiling capability.

Fuel efficient, meets emission standards

Doosan introduced three new crawler excavator models — the 14-ton DX140LCR with a reduced tail swing of just 4 feet, 10 inches and a 12-foot track length; the DX235LCR with near-zero tail swing of 5 feet, 6 inches and an operating weight of 53,572 pounds with standard boom, arm, and 1.2-cubic yard bucket; and the DX350LC with more engine horsepower yet good fuel efficiency. The DX350LC (pictured) also features a turbocharged 466-cubic inch engine; an operating weight of 77,603 pounds; 54,012 pounds of breakout force; a standard bucket capacity of 1.95 cubic yards; standard arm reach at ground level of 36 feet; a dig depth of 24 feet, 2 inches in an 8-foot level trench; and a lift capacity over front at a 20-foot radius of 27,540 pounds.

Load-sensing hydraulic system

Hyundai says its new HL770-9 wheel loader features a new load-sensing hydraulic system, fully automatic power shift transmission with variable shift control, multi-stage clutch cut-off, integrated payload system, auto-reversing cooling fan, large cab with improved visibility, air-ride seat with optional joystick steering, a 5.5-cubic yard bucket, and integrated rear-view backup camera. Serviceability has been improved with large, removable house doors designed for easy access to coolers and engine components. Access ladders have large steps with a 20-degree incline for safer access to the cab. The machine also features a GPS-capable satellite system (Hi-Mate) to keep the operator/fleet owner up to speed on all machine functions, fuel efficiency, and diagnostics through an online portal.