If you want a screening job done quickly and productively, you can’t go past the enormous power of the new Sandvik QE441 scalper.
This model is a step up from Sandvik’s flagship QE440 scalper and is the latest addition to the manufacturer’s premium range of mobile scalping screens distributed here by the Porter Group.
Stevenson Resources bought one recently from Porters for a specific job at its Drury Quarry at the pit’s new northern face.
Q&M paid a visit to the site where the new Sandvik QE441 was belting out three sizes of aggregate into neat heaps with the feeder Hyundai 50 tonne excavator just keeping up with it.
Already proven across a myriad of applications worldwide, the fines conveyor alone is designed to handle up to 900TPH. The QE441 will eat up the most robust of in-feed material and has been designed for large quarrying, mining and recycling applications. It can also work as a stand-alone unit feeding a primary crusher.
Steve Ellis, general manager, Stevenson Construction Material Aggregates, says the scalper was bought from Porters to scalp out unwanted fines – minus 100 or minus 65 depending on what screens are fitted.
“The plus 100 goes to the main primary plant and is used for a higher grade aggregate,” says Steve. “The -100 or -65 could be used as a lower cost sub base.”
Steve adds that the quarry is thrilled with the Sandvik QE441’s ruggedness and its production rate.
“Yes, the Sandvik QE441 is a big piece of equipment, but if you are putting -600/700 size rock through it all day it needs to be rugged, and it is capable of a through-put of between 400 to 500 tonne per hour. Plus, we want this scalper to last us for a few years and it is producing exactly what it is designed for.”
The quarry had already been using Sandvik cone crushers to supply its asphalt aggregate plant for almost two years, and has come to respect the brand.
The Drury Quarry’s primary excavator is also a Hyundai 120 tonne excavator from Porter.
“We have now done some 6500 hours on the excavator and have no regrets. The service has been great and we have experienced no breakdowns.”
Up close, the QE441 is an impressive piece of machinery, all the more outstanding in Sandvik racing red.
The design includes a heavy-duty I-beam chassis, apron feeder, reinforced hopper doors and impact bar lined overs conveyor.
Operator safety features include full size hydraulically folding catwalks and radio tracking and feeder control as standard; hydraulic hopper support legs to facilitate wheel loader feeding; incredible fuel efficiency, using just over 20 litres/hour; and a massive stockpiling capacity owing to extra length conveyors.
Feature improvements on the older QE440 include upgrades to the apron plate feeder, wear resistant hopper and radio remote controls, all of which are fitted as standard.
To improve the experience for operators, this model now includes Sandvik’s easy to use control system and user interface with sequential start, while two speed tracking reduces travel time between jobsites.
In short, the QE441 offers increased plant durability and operator comfort, without sacrificing on performance.
The cover photo and the ones with this article were taken last month when the scalper was in action on a freshly blasted section of the new, northern pit face at Drury Quarry. The Hyundai excavator dug and peeled away the loose bank of very clean greywacke and loaded it into the scalper, which created three piles – 100, 150 and rock for the main crusher. It had already put in 187 hours over a three week period.
Operator Kurt Temple says he’s very happy with his new piece of equipment.
“We struggle to stay up with its production and, as the section of the bank is dug out, we simply track the QE441 backwards closer to the material.”
The machine is expected to work on this upper, northern bench of the pit for another six months.
Meanwhile, Steve Ellis says the company has enjoyed a good commercial relationship with the Porter Group.
“And the backup service from them is very good. They supply services from a centre handy to both our Drury and Huntly quarries.
“And they are a private family company just like Stevenson.”