Kuiken Group demonstrate the benefits of a closed circuit system with the Sandvik QI341 Prisec™ HSI Impactor
The Sandvik QI341 Prisec™ has proven to be an essential machine for recycling applications in the Netherlands following recent demonstrations by Kuiken Group.
Kuiken, who joined Sandvik Construction as a distributor for mobile crushing and screening products in 2012, are a renowned full service distribution company for the Netherlands, specialising in construction equipment for material handling and recycling.
They recently hosted a demonstration of the bestselling Sandvik Impactor, and its performance exceeded all expectations and received exceptional feedback.
The QI341 Prisec™ HSI Impactor complete with hanging screen system offers a closed circuit crushing system, which is more cost effective and efficient because the machine can produce a calibrated product without the need for further machines.
Additionally, its compact size and ease of mobility make it ideal for inner-city recycling sites where space is limited. The QI341 can be easily transported by a low loader, moved onto the next location and quickly set-up for the next crushing application.
The QI341 was fed 0-600mm recycled concrete material at a rate of 190-200mtph. The crushed product was being used primarily as recycled sub-base material for road construction. The steel bar present in the feed was also to be recycled after being discharged by the overband magnet.
The pre-screen process was completed through the highly efficient double deck pre-screen with a high operating speed and an aggressive throw for excellent separation. For this application, the customer utilised a 60mm punched plate on the top deck accompanied by 40mm square mesh for the bottom deck.
All remaining material was passed down into the crushing chamber to the Sandvik patented CI411 Prisec™ HSI Impact Crusher which operated at 630rpm shaft speed. The unique design of this crusher means it can work as either a primary or secondary machine with just the simple adjustment of the curtain shaft positions.
For this application the crusher chamber was in primary position with the first curtain at 180mm and second at 50-60mm. This curtain adjustment allowed the machine to achieve outstanding reduction ratios but also provided an innovative solution for crusher blockages as the curtains can be hydraulically raised allowing the blockage to pass.
The Impactor chamber also features a heavy duty four bar rotor system with a tip speed range of 30 - 37 metres per second. This can also be operated with 2 full and 2 half blow bars depending on the application. The bars are held in position by a very simple and easy to remove wedge system which allows very quick change out time.
The hanging screen system is a single deck, two bearing screen box which, for this application, featured a 55mm square mesh allowing the machine to put a sized product on the ground. The oversize product can be either returned or stockpiled using a hydraulically controlled slew ring system on the recirc conveyor
Since the demonstration of this QI341 Prisec™ HSI Impactor, it has continued to be a popular machine in the market due to its high performance and ability to produce a finished, calibrated product from just one machine.
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