Latest QA-Series evolution comprises enhanced triple-deck Doublescreen solution
SANDVIK Mobile Crushers and Screens have launched the new QA452 – the latest evolution of the Sandvik QA-Series products and three-deck Doublescreen technology, which, according to Sandvik, typically outperforms traditional screens by up to 30%, offering a tailored rock processing solution for the quarrying, mining, and recycling industries.
With a host of new innovations, Sandvik say they have engineered a first-of-its-kind tracked mobile plant with independent screen angle adjustment and hydraulic screen separation (patent pending). It features two triple-deck, in-line screenboxes with equal-size screen decks, each providing 9 cu m (100 sq ft) of screening area.
Screen enhancements include an 11% longer bottom screen deck to extract more fines. Featuring independent screen angle adjustment, the primary screen can be independently adjusted from the secondary screen, allowing operators to optimize throughput, screening efficiency, and product gradations.
The primary screen performs as a fines extractor, whilst the secondary screen performs as a grader, with the two processes on one plant said to offer exceptional flexibility, excellent separation, accurate grading, and huge throughput.
Equipped with Sandvik hybrid ‘e’ drive with electric plug-in, operators can choose the most economical and efficient energy source, whilst the QA452 delivers a lower environmental impact due to reduced fuel consumption and the latest onboard powerpack generates less operating noise and lower emissions.
Moreover, the hydraulic system has been enhanced to reduce energy wastage, and hydraulic oil change intervals have been extended from 2,000 to 4,000 hours, meaning up to 50% less hydraulic oil is consumed over 10,000 hours of machine usage (subject to oil sampling).
In addition, the primary screen can be hydraulically separated to gain better access for maintenance and screen media changes, whilst the addition of a new oversize cross-conveyor means greater oversize material extraction. The cross-conveyor can also be reversed, allowing the plant to function like a two-deck screen with oversize and mid-overs discharged together.
Each screen deck features end-tension screen media using Sandvik’s special mesh-tensioning system for faster screen adjustment and removal, whilst the company’s new range of WX rubber media combines the high accuracy of wire screens with the durability of rubber, offering up to 10 times longer wear life and up to 50% faster installation compared with wire mesh. Having equal size panels also means the screen media is interchangeable between decks.
The QA452 comes with a user-friendly PLC control system with sequential start/stop for speed and ease of set-up, as well as Sandvik’s My Fleet telemetry system and seven-year data subscription as standard. This offers fleet management, geo-fencing, and remote support 24 hours a day, seven days a week.
With safety being the number one priority, several features have been included as standard to improve operator and on-site protection, including dust-suppression spray bars, onboard water pump, safety pull cords, and a lighting mast. The QA452 also comes with Security+ extended warranty and service package for greater uptime and peace of mind.