Drill Rig Offers Active System Controls
Designed for a 5-in. hammer, the DI550 DTH drill rig is powered by a 324-kW engine and has a 24.4-m 3 compressor at 24 bar pressure. Cost-effective machine performance is enhanced, Sandvik said, by features such as active diesel RPM control, optimized diesel RPM level dur-ing drilling, and active control of the com-pressor running temperature.

For the operator, the rig’s control sys-tem uses simple icon displays and gives comprehensive service information, with the positive pressurized, air-conditioned ROPS/FOPS cab providing good visibility. The windshield comes with a strong safe-ty bar that is easy to open for cleaning. A low-maintenance dust collector comple-ments other features such as the engine compartment’s open layout, easy cooler cleaning, modular compressor control system and simplified electric system, the company states. A fast fuel-filling option and large fuel tank further cut downtime.

Redesigned Jaw Crusher
Sandvik launched its QJ341 tracked jaw crusher at the show, the machine having been redesigned from the previous model, the QJ340, to incorporate a power plant that meets the new engine-emission control regulations. Features retained from the ear-lier machine include a 1,200 × 750-mm (48 × 30-in.) feed opening, hydraulically adjustable CSS, high reduction ratios, crushing speed and productivity, reverse crushing action to relieve blockages, and an automatic central lubrication system.

New features added to the QJ341 include a load-control system for the feed-er drive, a level sensor fitted to the jaw and a speed wheel fitted to the main conveyor. Other new features include a choice of Stage 3A/Tier 3 or Stage 3B/Tier 4i engines, a user-friendly PLC control system and color screen allowing visual data out-put and control, more controlled maneu-verability, and the capability to work at 50°C ambient temperature without the need for a change of oil.

The QJ341 is designed for use in sur-face mining, aggregates production, quarrying and recycling, as is the UJ440i, one of Sandvik’s range of heavy mobile crushers. The engines used in these machines require the addition of urea or AdBlue solution, with the crush-ers having been designed to give higher efficiency to help offset the cost. In addition, the SCR system puts less wear on the engine, which will result in reduced maintenance, Sandvik said.

The UJ440i has a 1,200 × 800-mm (48 × 32-in.) jaw size, with production being monitored continuously by an ‘intel-ligent’ control system. A key feature, the company claims, is the use of direct drive between the engine and the crusher, help-ing to maximize the transfer of power.

Rammer: Four Large
Marking its return to Hillhead after a five-year brand absence, Rammer’s exhibit fea-tured four models from its ‘Large’ range of hydraulic hammers: the 3,540-kg Rammer 4099; a pair of 2,350-kg 3288 models, one in heavy duty, the other in hard rock configuration; and a 1,700-kg 2577. Designed around a new operating principle that can be matched to specific applica-tions, the 3288 and 4099 are suitable for carriers in the 27-40 mt and 35-60 mt operating weight classes, respectively.