The new QA452 from Sandvik Mobile Crushers and Screens is the latest evolution of the company’s QA Series products and three-deck Doublescreen technology.
According to Sandvik, its Doublescreen technology typically outperforms traditional screens by up to 30%, offering a tailored rock processing solution for quarry, recycling and mining industries.
This new three-deck tracked mobile plant has an independent screen angle adjustment and hydraulic screen separation. There are two triple deck inline screen boxes with equal size screen decks, each providing 9 cu m of screening area.
Screen enhancements include an 11% longer bottom screen deck to extract more fines. With an independent screen angle adjustment, the primary screen can be independently adjusted from the secondary screen, allowing operators to optimise their throughput, screening efficiency and product gradations.
The primary screen performs as a fines extractor, whilst the secondary screen performs as a grader. Two processes on one plant, resulting in exceptional flexibility, excellent separation, accurate grading and massive throughput.
Sandvik offers hybrid ‘e’ drive with electric plug-in, which enables users to choose the most economical and efficient energy source. The QA452 provides a lower environmental impact due to reduced fuel consumption, and the latest powerpack onboard delivers less operating noise and low emissions.
In addition, the hydraulic system has been improved to reduce energy wastage, and its 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).
The primary screen can also be hydraulically separated to gain better access for maintenance and screen media changes. The addition of a new oversize cross conveyor means greater oversize material extraction. This cross conveyor can also be reversed, to allow 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 mesh tensioning system. This leads to faster screen mesh tensioning and removal when users need uptime. Sandvik’s new range of WX rubber media combines the high accuracy of wire screens, but with the durability of rubber offering up to 10x longer wear life and up to 50% faster installation time compared to wire mesh.
Furthermore, the QA452 comes with Sandvik’s My Fleet telemetry system and seven-year data subscription as standard. This provides 24/7 fleet management, geo-fencing and remote support. For higher safety, several features have been incorporated to improve operator and onsite protection. Dust suppression spray bars, onboard water pump, safety pull cords and lighting mast are now fitted as standard for extra peace of mind.